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webkit / WebKit / 62cf60e80b9ad80df78f7a0cb26470abc296cd07 / . / Source / WebCore / html / canvas / WebGLRenderingContextBase.cpp
blob: c85a8f47b4ea25ca856a10acf93e2756f5a6be65 [file] [log] [blame]
/*
* Copyright (C) 2015-2017 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "WebGLRenderingContextBase.h"
#if ENABLE(WEBGL)
#include "ANGLEInstancedArrays.h"
#include "CachedImage.h"
#include "DOMWindow.h"
#include "DiagnosticLoggingClient.h"
#include "DiagnosticLoggingKeys.h"
#include "Document.h"
#include "EXTBlendMinMax.h"
#include "EXTFragDepth.h"
#include "EXTShaderTextureLOD.h"
#include "EXTTextureFilterAnisotropic.h"
#include "EXTsRGB.h"
#include "EventNames.h"
#include "Extensions3D.h"
#include "Frame.h"
#include "FrameLoader.h"
#include "FrameLoaderClient.h"
#include "FrameView.h"
#include "GraphicsContext.h"
#include "HTMLCanvasElement.h"
#include "HTMLImageElement.h"
#include "HTMLVideoElement.h"
#include "ImageBuffer.h"
#include "ImageData.h"
#include "InspectorInstrumentation.h"
#include "IntSize.h"
#include "JSExecState.h"
#include "Logging.h"
#include "NotImplemented.h"
#include "OESElementIndexUint.h"
#include "OESStandardDerivatives.h"
#include "OESTextureFloat.h"
#include "OESTextureFloatLinear.h"
#include "OESTextureHalfFloat.h"
#include "OESTextureHalfFloatLinear.h"
#include "OESVertexArrayObject.h"
#include "OffscreenCanvas.h"
#include "Page.h"
#include "RenderBox.h"
#include "RuntimeEnabledFeatures.h"
#include "Settings.h"
#include "WebGL2RenderingContext.h"
#include "WebGLActiveInfo.h"
#include "WebGLBuffer.h"
#include "WebGLCompressedTextureASTC.h"
#include "WebGLCompressedTextureATC.h"
#include "WebGLCompressedTexturePVRTC.h"
#include "WebGLCompressedTextureS3TC.h"
#include "WebGLContextAttributes.h"
#include "WebGLContextEvent.h"
#include "WebGLContextGroup.h"
#include "WebGLDebugRendererInfo.h"
#include "WebGLDebugShaders.h"
#include "WebGLDepthTexture.h"
#include "WebGLDrawBuffers.h"
#include "WebGLFramebuffer.h"
#include "WebGLLoseContext.h"
#include "WebGLProgram.h"
#include "WebGLRenderbuffer.h"
#include "WebGLRenderingContext.h"
#include "WebGLShader.h"
#include "WebGLShaderPrecisionFormat.h"
#include "WebGLTexture.h"
#include "WebGLUniformLocation.h"
#include <JavaScriptCore/ConsoleMessage.h>
#include <JavaScriptCore/JSCInlines.h>
#include <JavaScriptCore/ScriptCallStack.h>
#include <JavaScriptCore/ScriptCallStackFactory.h>
#include <JavaScriptCore/TypedArrayInlines.h>
#include <JavaScriptCore/Uint32Array.h>
#include <wtf/CheckedArithmetic.h>
#include <wtf/HashMap.h>
#include <wtf/HexNumber.h>
#include <wtf/IsoMallocInlines.h>
#include <wtf/Lock.h>
#include <wtf/StdLibExtras.h>
#include <wtf/UniqueArray.h>
#include <wtf/text/CString.h>
#include <wtf/text/StringBuilder.h>
namespace WebCore {
WTF_MAKE_ISO_ALLOCATED_IMPL(WebGLRenderingContextBase);
static const Seconds secondsBetweenRestoreAttempts { 1_s };
const int maxGLErrorsAllowedToConsole = 256;
static const Seconds checkContextLossHandlingDelay { 3_s };
namespace {
GC3Dint clamp(GC3Dint value, GC3Dint min, GC3Dint max)
{
if (value < min)
value = min;
if (value > max)
value = max;
return value;
}
// Return true if a character belongs to the ASCII subset as defined in
// GLSL ES 1.0 spec section 3.1.
bool validateCharacter(unsigned char c)
{
// Printing characters are valid except " $ ` @ \ ' DEL.
if (c >= 32 && c <= 126
&& c != '"' && c != '$' && c != '`' && c != '@' && c != '\\' && c != '\'')
return true;
// Horizontal tab, line feed, vertical tab, form feed, carriage return
// are also valid.
if (c >= 9 && c <= 13)
return true;
return false;
}
bool isPrefixReserved(const String& name)
{
if (name.startsWith("gl_") || name.startsWith("webgl_") || name.startsWith("_webgl_"))
return true;
return false;
}
// Strips comments from shader text. This allows non-ASCII characters
// to be used in comments without potentially breaking OpenGL
// implementations not expecting characters outside the GLSL ES set.
class StripComments {
public:
StripComments(const String& str)
: m_parseState(BeginningOfLine)
, m_sourceString(str)
, m_length(str.length())
, m_position(0)
{
parse();
}
String result()
{
return m_builder.toString();
}
private:
bool hasMoreCharacters() const
{
return (m_position < m_length);
}
void parse()
{
while (hasMoreCharacters()) {
process(current());
// process() might advance the position.
if (hasMoreCharacters())
advance();
}
}
void process(UChar);
bool peek(UChar& character) const
{
if (m_position + 1 >= m_length)
return false;
character = m_sourceString[m_position + 1];
return true;
}
UChar current() const
{
ASSERT_WITH_SECURITY_IMPLICATION(m_position < m_length);
return m_sourceString[m_position];
}
void advance()
{
++m_position;
}
bool isNewline(UChar character) const
{
// Don't attempt to canonicalize newline related characters.
return (character == '\n' || character == '\r');
}
void emit(UChar character)
{
m_builder.append(character);
}
enum ParseState {
// Have not seen an ASCII non-whitespace character yet on
// this line. Possible that we might see a preprocessor
// directive.
BeginningOfLine,
// Have seen at least one ASCII non-whitespace character
// on this line.
MiddleOfLine,
// Handling a preprocessor directive. Passes through all
// characters up to the end of the line. Disables comment
// processing.
InPreprocessorDirective,
// Handling a single-line comment. The comment text is
// replaced with a single space.
InSingleLineComment,
// Handling a multi-line comment. Newlines are passed
// through to preserve line numbers.
InMultiLineComment
};
ParseState m_parseState;
String m_sourceString;
unsigned m_length;
unsigned m_position;
StringBuilder m_builder;
};
void StripComments::process(UChar c)
{
if (isNewline(c)) {
// No matter what state we are in, pass through newlines
// so we preserve line numbers.
emit(c);
if (m_parseState != InMultiLineComment)
m_parseState = BeginningOfLine;
return;
}
UChar temp = 0;
switch (m_parseState) {
case BeginningOfLine:
if (WTF::isASCIISpace(c)) {
emit(c);
break;
}
if (c == '#') {
m_parseState = InPreprocessorDirective;
emit(c);
break;
}
// Transition to normal state and re-handle character.
m_parseState = MiddleOfLine;
process(c);
break;
case MiddleOfLine:
if (c == '/' && peek(temp)) {
if (temp == '/') {
m_parseState = InSingleLineComment;
emit(' ');
advance();
break;
}
if (temp == '*') {
m_parseState = InMultiLineComment;
// Emit the comment start in case the user has
// an unclosed comment and we want to later
// signal an error.
emit('/');
emit('*');
advance();
break;
}
}
emit(c);
break;
case InPreprocessorDirective:
// No matter what the character is, just pass it
// through. Do not parse comments in this state. This
// might not be the right thing to do long term, but it
// should handle the #error preprocessor directive.
emit(c);
break;
case InSingleLineComment:
// The newline code at the top of this function takes care
// of resetting our state when we get out of the
// single-line comment. Swallow all other characters.
break;
case InMultiLineComment:
if (c == '*' && peek(temp) && temp == '/') {
emit('*');
emit('/');
m_parseState = MiddleOfLine;
advance();
break;
}
// Swallow all other characters. Unclear whether we may
// want or need to just emit a space per character to try
// to preserve column numbers for debugging purposes.
break;
}
}
} // namespace anonymous
// Returns false if no clipping is necessary, i.e., x, y, width, height stay the same.
static bool clip2D(GC3Dint x, GC3Dint y, GC3Dsizei width, GC3Dsizei height,
GC3Dsizei sourceWidth, GC3Dsizei sourceHeight,
GC3Dint* clippedX, GC3Dint* clippedY, GC3Dsizei* clippedWidth, GC3Dsizei*clippedHeight)
{
ASSERT(clippedX && clippedY && clippedWidth && clippedHeight);
GC3Dint left = std::max(x, 0);
GC3Dint top = std::max(y, 0);
GC3Dint right = 0;
GC3Dint bottom = 0;
Checked<GC3Dint, RecordOverflow> checkedInputRight = Checked<GC3Dint>(x) + Checked<GC3Dsizei>(width);
Checked<GC3Dint, RecordOverflow> checkedInputBottom = Checked<GC3Dint>(y) + Checked<GC3Dsizei>(height);
if (!checkedInputRight.hasOverflowed() && !checkedInputBottom.hasOverflowed()) {
right = std::min(checkedInputRight.unsafeGet(), sourceWidth);
bottom = std::min(checkedInputBottom.unsafeGet(), sourceHeight);
}
if (left >= right || top >= bottom) {
*clippedX = 0;
*clippedY = 0;
*clippedWidth = 0;
*clippedHeight = 0;
return true;
}
*clippedX = left;
*clippedY = top;
*clippedWidth = right - left;
*clippedHeight = bottom - top;
return (*clippedX != x || *clippedY != y || *clippedWidth != width || *clippedHeight != height);
}
class WebGLRenderingContextLostCallback : public GraphicsContext3D::ContextLostCallback {
WTF_MAKE_FAST_ALLOCATED;
public:
explicit WebGLRenderingContextLostCallback(WebGLRenderingContextBase* cb) : m_context(cb) { }
virtual ~WebGLRenderingContextLostCallback() = default;
void onContextLost() override { m_context->forceLostContext(WebGLRenderingContext::RealLostContext); }
private:
WebGLRenderingContextBase* m_context;
};
class WebGLRenderingContextErrorMessageCallback : public GraphicsContext3D::ErrorMessageCallback {
WTF_MAKE_FAST_ALLOCATED;
public:
explicit WebGLRenderingContextErrorMessageCallback(WebGLRenderingContextBase* cb) : m_context(cb) { }
virtual ~WebGLRenderingContextErrorMessageCallback() = default;
void onErrorMessage(const String& message, GC3Dint) override
{
if (m_context->m_synthesizedErrorsToConsole)
m_context->printToConsole(MessageLevel::Error, message);
}
private:
WebGLRenderingContextBase* m_context;
};
class InspectorScopedShaderProgramHighlight {
public:
InspectorScopedShaderProgramHighlight(WebGLRenderingContextBase& context, WebGLProgram* program)
: m_context(context)
, m_program(program)
{
showHightlight();
}
~InspectorScopedShaderProgramHighlight()
{
hideHighlight();
}
private:
void showHightlight()
{
if (!m_program || LIKELY(!InspectorInstrumentation::isShaderProgramHighlighted(m_context, *m_program)))
return;
if (hasBufferBinding(GraphicsContext3D::FRAMEBUFFER_BINDING)) {
if (!hasBufferBinding(GraphicsContext3D::RENDERBUFFER_BINDING))
return;
if (hasFramebufferParameterAttachment(GraphicsContext3D::DEPTH_ATTACHMENT))
return;
if (hasFramebufferParameterAttachment(GraphicsContext3D::STENCIL_ATTACHMENT))
return;
#if ENABLE(WEBGL2)
if (hasFramebufferParameterAttachment(GraphicsContext3D::DEPTH_STENCIL_ATTACHMENT))
return;
#endif
}
saveBlendValue(GraphicsContext3D::BLEND_COLOR, m_savedBlend.color);
saveBlendValue(GraphicsContext3D::BLEND_EQUATION_RGB, m_savedBlend.equationRGB);
saveBlendValue(GraphicsContext3D::BLEND_EQUATION_ALPHA, m_savedBlend.equationAlpha);
saveBlendValue(GraphicsContext3D::BLEND_SRC_RGB, m_savedBlend.srcRGB);
saveBlendValue(GraphicsContext3D::BLEND_SRC_ALPHA, m_savedBlend.srcAlpha);
saveBlendValue(GraphicsContext3D::BLEND_DST_RGB, m_savedBlend.dstRGB);
saveBlendValue(GraphicsContext3D::BLEND_DST_ALPHA, m_savedBlend.dstAlpha);
saveBlendValue(GraphicsContext3D::BLEND, m_savedBlend.enabled);
static const GC3Dfloat red = 111.0 / 255.0;
static const GC3Dfloat green = 168.0 / 255.0;
static const GC3Dfloat blue = 220.0 / 255.0;
static const GC3Dfloat alpha = 2.0 / 3.0;
m_context.enable(GraphicsContext3D::BLEND);
m_context.blendColor(red, green, blue, alpha);
m_context.blendEquation(GraphicsContext3D::FUNC_ADD);
m_context.blendFunc(GraphicsContext3D::CONSTANT_COLOR, GraphicsContext3D::ONE_MINUS_SRC_ALPHA);
m_didApply = true;
}
void hideHighlight()
{
if (!m_didApply)
return;
if (!m_savedBlend.enabled)
m_context.disable(GraphicsContext3D::BLEND);
const RefPtr<Float32Array>& color = m_savedBlend.color;
m_context.blendColor(color->item(0), color->item(1), color->item(2), color->item(3));
m_context.blendEquationSeparate(m_savedBlend.equationRGB, m_savedBlend.equationAlpha);
m_context.blendFuncSeparate(m_savedBlend.srcRGB, m_savedBlend.dstRGB, m_savedBlend.srcAlpha, m_savedBlend.dstAlpha);
m_savedBlend.color = nullptr;
m_didApply = false;
}
template <typename T>
void saveBlendValue(GC3Denum attachment, T& destination)
{
WebGLAny param = m_context.getParameter(attachment);
if (WTF::holds_alternative<T>(param))
destination = WTF::get<T>(param);
}
bool hasBufferBinding(GC3Denum pname)
{
WebGLAny binding = m_context.getParameter(pname);
if (pname == GraphicsContext3D::FRAMEBUFFER_BINDING)
return WTF::holds_alternative<RefPtr<WebGLFramebuffer>>(binding) && WTF::get<RefPtr<WebGLFramebuffer>>(binding);
if (pname == GraphicsContext3D::RENDERBUFFER_BINDING)
return WTF::holds_alternative<RefPtr<WebGLRenderbuffer>>(binding) && WTF::get<RefPtr<WebGLRenderbuffer>>(binding);
return false;
}
bool hasFramebufferParameterAttachment(GC3Denum attachment)
{
WebGLAny attachmentParameter = m_context.getFramebufferAttachmentParameter(GraphicsContext3D::FRAMEBUFFER, attachment, GraphicsContext3D::FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE);
if (!WTF::holds_alternative<unsigned>(attachmentParameter))
return false;
if (WTF::get<unsigned>(attachmentParameter) != static_cast<unsigned>(GraphicsContext3D::RENDERBUFFER))
return false;
return true;
}
struct {
RefPtr<Float32Array> color;
unsigned equationRGB { 0 };
unsigned equationAlpha { 0 };
unsigned srcRGB { 0 };
unsigned srcAlpha { 0 };
unsigned dstRGB { 0 };
unsigned dstAlpha { 0 };
bool enabled { false };
} m_savedBlend;
WebGLRenderingContextBase& m_context;
WebGLProgram* m_program { nullptr };
bool m_didApply { false };
};
static bool isHighPerformanceContext(const RefPtr<GraphicsContext3D>& context)
{
return context->powerPreferenceUsedForCreation() == WebGLPowerPreference::HighPerformance;
}
std::unique_ptr<WebGLRenderingContextBase> WebGLRenderingContextBase::create(CanvasBase& canvas, WebGLContextAttributes& attributes, const String& type)
{
#if ENABLE(WEBGL2)
if (type == "webgl2" && !RuntimeEnabledFeatures::sharedFeatures().webGL2Enabled())
return nullptr;
#else
UNUSED_PARAM(type);
#endif
bool isPendingPolicyResolution = false;
HostWindow* hostWindow = nullptr;
auto* canvasElement = is<HTMLCanvasElement>(canvas) ? &downcast<HTMLCanvasElement>(canvas) : nullptr;
if (canvasElement) {
Document& document = canvasElement->document();
RefPtr<Frame> frame = document.frame();
if (!frame)
return nullptr;
// The FrameLoaderClient might block creation of a new WebGL context despite the page settings; in
// particular, if WebGL contexts were lost one or more times via the GL_ARB_robustness extension.
if (!frame->loader().client().allowWebGL(frame->settings().webGLEnabled())) {
canvasElement->dispatchEvent(WebGLContextEvent::create(eventNames().webglcontextcreationerrorEvent,
Event::CanBubble::No, Event::IsCancelable::Yes, "Web page was not allowed to create a WebGL context."));
return nullptr;
}
Document& topDocument = document.topDocument();
Page* page = topDocument.page();
bool forcingPendingPolicy = frame->settings().isForcePendingWebGLPolicy();
if (forcingPendingPolicy || (page && !topDocument.url().isLocalFile())) {
WebGLLoadPolicy policy = forcingPendingPolicy ? WebGLPendingCreation : page->mainFrame().loader().client().webGLPolicyForURL(topDocument.url());
if (policy == WebGLBlockCreation) {
LOG(WebGL, "The policy for this URL (%s) is to block WebGL.", topDocument.url().host().utf8().data());
return nullptr;
}
if (policy == WebGLPendingCreation) {
LOG(WebGL, "WebGL policy is pending. May need to be resolved later.");
isPendingPolicyResolution = true;
}
}
if (frame->settings().forceSoftwareWebGLRendering())
attributes.forceSoftwareRenderer = true;
if (frame->settings().forceWebGLUsesLowPower()) {
if (attributes.powerPreference == GraphicsContext3DPowerPreference::HighPerformance)
LOG(WebGL, "Overriding powerPreference from high-performance to low-power.");
attributes.powerPreference = GraphicsContext3DPowerPreference::LowPower;
}
if (page)
attributes.devicePixelRatio = page->deviceScaleFactor();
hostWindow = document.view()->root()->hostWindow();
}
attributes.noExtensions = true;
attributes.shareResources = false;
attributes.initialPowerPreference = attributes.powerPreference;
#if ENABLE(WEBGL2)
if (type == "webgl2")
attributes.isWebGL2 = true;
#endif
if (isPendingPolicyResolution) {
LOG(WebGL, "Create a WebGL context that looks real, but will require a policy resolution if used.");
std::unique_ptr<WebGLRenderingContextBase> renderingContext = nullptr;
#if ENABLE(WEBGL2)
if (type == "webgl2")
renderingContext = WebGL2RenderingContext::create(canvas, attributes);
else
#endif
renderingContext = WebGLRenderingContext::create(canvas, attributes);
renderingContext->suspendIfNeeded();
return renderingContext;
}
auto context = GraphicsContext3D::create(attributes, hostWindow);
if (!context || !context->makeContextCurrent()) {
if (canvasElement) {
canvasElement->dispatchEvent(WebGLContextEvent::create(eventNames().webglcontextcreationerrorEvent,
Event::CanBubble::No, Event::IsCancelable::Yes, "Could not create a WebGL context."));
}
return nullptr;
}
auto& extensions = context->getExtensions();
if (extensions.supports("GL_EXT_debug_marker"_s))
extensions.pushGroupMarkerEXT("WebGLRenderingContext"_s);
#if ENABLE(WEBGL2) && PLATFORM(MAC)
// glTexStorage() was only added to Core in OpenGL 4.2.
// However, according to https://developer.apple.com/opengl/capabilities/ all Apple GPUs support this extension.
if (attributes.isWebGL2 && !extensions.supports("GL_ARB_texture_storage"))
return nullptr;
#endif
std::unique_ptr<WebGLRenderingContextBase> renderingContext;
#if ENABLE(WEBGL2)
if (type == "webgl2")
renderingContext = WebGL2RenderingContext::create(canvas, context.releaseNonNull(), attributes);
else
#endif
renderingContext = WebGLRenderingContext::create(canvas, context.releaseNonNull(), attributes);
renderingContext->suspendIfNeeded();
return renderingContext;
}
WebGLRenderingContextBase::WebGLRenderingContextBase(CanvasBase& canvas, WebGLContextAttributes attributes)
: GPUBasedCanvasRenderingContext(canvas)
, m_dispatchContextLostEventTimer(*this, &WebGLRenderingContextBase::dispatchContextLostEvent)
, m_restoreTimer(*this, &WebGLRenderingContextBase::maybeRestoreContext)
, m_attributes(attributes)
, m_numGLErrorsToConsoleAllowed(maxGLErrorsAllowedToConsole)
, m_isPendingPolicyResolution(true)
, m_checkForContextLossHandlingTimer(*this, &WebGLRenderingContextBase::checkForContextLossHandling)
{
registerWithWebGLStateTracker();
m_checkForContextLossHandlingTimer.startOneShot(checkContextLossHandlingDelay);
}
WebGLRenderingContextBase::WebGLRenderingContextBase(CanvasBase& canvas, Ref<GraphicsContext3D>&& context, WebGLContextAttributes attributes)
: GPUBasedCanvasRenderingContext(canvas)
, m_context(WTFMove(context))
, m_dispatchContextLostEventTimer(*this, &WebGLRenderingContextBase::dispatchContextLostEvent)
, m_restoreTimer(*this, &WebGLRenderingContextBase::maybeRestoreContext)
, m_generatedImageCache(4)
, m_attributes(attributes)
, m_numGLErrorsToConsoleAllowed(maxGLErrorsAllowedToConsole)
, m_checkForContextLossHandlingTimer(*this, &WebGLRenderingContextBase::checkForContextLossHandling)
{
m_contextGroup = WebGLContextGroup::create();
m_contextGroup->addContext(*this);
m_context->addClient(*this);
m_context->getIntegerv(GraphicsContext3D::MAX_VIEWPORT_DIMS, m_maxViewportDims);
setupFlags();
initializeNewContext();
registerWithWebGLStateTracker();
m_checkForContextLossHandlingTimer.startOneShot(checkContextLossHandlingDelay);
addActivityStateChangeObserverIfNecessary();
}
WebGLCanvas WebGLRenderingContextBase::canvas()
{
auto& base = canvasBase();
if (is<OffscreenCanvas>(base))
return &downcast<OffscreenCanvas>(base);
return &downcast<HTMLCanvasElement>(base);
}
HTMLCanvasElement* WebGLRenderingContextBase::htmlCanvas()
{
auto& base = canvasBase();
if (!is<HTMLCanvasElement>(base))
return nullptr;
return &downcast<HTMLCanvasElement>(base);
}
OffscreenCanvas* WebGLRenderingContextBase::offscreenCanvas()
{
auto& base = canvasBase();
if (!is<OffscreenCanvas>(base))
return nullptr;
return &downcast<OffscreenCanvas>(base);
}
// We check for context loss handling after a few seconds to give the JS a chance to register the event listeners
// and to discard temporary GL contexts (e.g. feature detection).
void WebGLRenderingContextBase::checkForContextLossHandling()
{
auto canvas = htmlCanvas();
if (!canvas)
return;
if (!canvas->renderer())
return;
auto* page = canvas->document().page();
if (!page)
return;
bool handlesContextLoss = canvas->hasEventListeners(eventNames().webglcontextlostEvent) && canvas->hasEventListeners(eventNames().webglcontextrestoredEvent);
page->diagnosticLoggingClient().logDiagnosticMessage(DiagnosticLoggingKeys::pageHandlesWebGLContextLossKey(), handlesContextLoss ? DiagnosticLoggingKeys::yesKey() : DiagnosticLoggingKeys::noKey(), ShouldSample::No);
}
void WebGLRenderingContextBase::registerWithWebGLStateTracker()
{
auto canvas = htmlCanvas();
if (!canvas)
return;
auto* page = canvas->document().page();
if (!page)
return;
auto* tracker = page->webGLStateTracker();
if (!tracker)
return;
m_trackerToken = tracker->token(m_attributes.initialPowerPreference);
}
void WebGLRenderingContextBase::initializeNewContext()
{
ASSERT(!m_contextLost);
m_needsUpdate = true;
m_markedCanvasDirty = false;
m_activeTextureUnit = 0;
m_packAlignment = 4;
m_unpackAlignment = 4;
m_unpackFlipY = false;
m_unpackPremultiplyAlpha = false;
m_unpackColorspaceConversion = GraphicsContext3D::BROWSER_DEFAULT_WEBGL;
m_boundArrayBuffer = nullptr;
m_currentProgram = nullptr;
m_framebufferBinding = nullptr;
m_readFramebufferBinding = nullptr;
m_renderbufferBinding = nullptr;
m_depthMask = true;
m_stencilEnabled = false;
m_stencilMask = 0xFFFFFFFF;
m_stencilMaskBack = 0xFFFFFFFF;
m_stencilFuncRef = 0;
m_stencilFuncRefBack = 0;
m_stencilFuncMask = 0xFFFFFFFF;
m_stencilFuncMaskBack = 0xFFFFFFFF;
m_layerCleared = false;
m_numGLErrorsToConsoleAllowed = maxGLErrorsAllowedToConsole;
m_clearColor[0] = m_clearColor[1] = m_clearColor[2] = m_clearColor[3] = 0;
m_scissorEnabled = false;
m_clearDepth = 1;
m_clearStencil = 0;
m_colorMask[0] = m_colorMask[1] = m_colorMask[2] = m_colorMask[3] = true;
GC3Dint numCombinedTextureImageUnits = 0;
m_context->getIntegerv(GraphicsContext3D::MAX_COMBINED_TEXTURE_IMAGE_UNITS, &numCombinedTextureImageUnits);
m_textureUnits.clear();
m_textureUnits.resize(numCombinedTextureImageUnits);
for (GC3Dint i = 0; i < numCombinedTextureImageUnits; ++i)
m_unrenderableTextureUnits.add(i);
GC3Dint numVertexAttribs = 0;
m_context->getIntegerv(GraphicsContext3D::MAX_VERTEX_ATTRIBS, &numVertexAttribs);
m_maxVertexAttribs = numVertexAttribs;
m_maxTextureSize = 0;
m_context->getIntegerv(GraphicsContext3D::MAX_TEXTURE_SIZE, &m_maxTextureSize);
m_maxTextureLevel = WebGLTexture::computeLevelCount(m_maxTextureSize, m_maxTextureSize);
m_maxCubeMapTextureSize = 0;
m_context->getIntegerv(GraphicsContext3D::MAX_CUBE_MAP_TEXTURE_SIZE, &m_maxCubeMapTextureSize);
m_maxCubeMapTextureLevel = WebGLTexture::computeLevelCount(m_maxCubeMapTextureSize, m_maxCubeMapTextureSize);
m_maxRenderbufferSize = 0;
m_context->getIntegerv(GraphicsContext3D::MAX_RENDERBUFFER_SIZE, &m_maxRenderbufferSize);
// These two values from EXT_draw_buffers are lazily queried.
m_maxDrawBuffers = 0;
m_maxColorAttachments = 0;
m_backDrawBuffer = GraphicsContext3D::BACK;
m_drawBuffersWebGLRequirementsChecked = false;
m_drawBuffersSupported = false;
m_vertexAttribValue.resize(m_maxVertexAttribs);
if (!isGLES2NPOTStrict())
createFallbackBlackTextures1x1();
IntSize canvasSize = clampedCanvasSize();
m_context->reshape(canvasSize.width(), canvasSize.height());
m_context->viewport(0, 0, canvasSize.width(), canvasSize.height());
m_context->scissor(0, 0, canvasSize.width(), canvasSize.height());
m_context->setContextLostCallback(std::make_unique<WebGLRenderingContextLostCallback>(this));
m_context->setErrorMessageCallback(std::make_unique<WebGLRenderingContextErrorMessageCallback>(this));
}
void WebGLRenderingContextBase::setupFlags()
{
ASSERT(m_context);
auto canvas = htmlCanvas();
if (canvas) {
if (Page* page = canvas->document().page())
m_synthesizedErrorsToConsole = page->settings().webGLErrorsToConsoleEnabled();
}
m_isGLES2Compliant = m_context->isGLES2Compliant();
if (m_isGLES2Compliant) {
m_isGLES2NPOTStrict = !m_context->getExtensions().isEnabled("GL_OES_texture_npot");
m_isDepthStencilSupported = m_context->getExtensions().isEnabled("GL_OES_packed_depth_stencil");
} else {
m_isGLES2NPOTStrict = !m_context->getExtensions().isEnabled("GL_ARB_texture_non_power_of_two");
m_isDepthStencilSupported = m_context->getExtensions().isEnabled("GL_EXT_packed_depth_stencil");
}
m_isRobustnessEXTSupported = m_context->getExtensions().isEnabled("GL_EXT_robustness");
}
void WebGLRenderingContextBase::addCompressedTextureFormat(GC3Denum format)
{
if (!m_compressedTextureFormats.contains(format))
m_compressedTextureFormats.append(format);
}
void WebGLRenderingContextBase::addActivityStateChangeObserverIfNecessary()
{
// We are only interested in visibility changes for contexts
// that are using the high-performance GPU.
if (!isHighPerformanceContext(m_context))
return;
auto* canvas = htmlCanvas();
if (!canvas)
return;
auto* page = canvas->document().page();
if (!page)
return;
page->addActivityStateChangeObserver(*this);
// We won't get a state change right away, so
// make sure the context knows if it visible or not.
if (m_context)
m_context->setContextVisibility(page->isVisible());
}
void WebGLRenderingContextBase::removeActivityStateChangeObserver()
{
auto* canvas = htmlCanvas();
if (canvas) {
if (auto* page = canvas->document().page())
page->removeActivityStateChangeObserver(*this);
}
}
WebGLRenderingContextBase::~WebGLRenderingContextBase()
{
// Remove all references to WebGLObjects so if they are the last reference
// they will be freed before the last context is removed from the context group.
m_boundArrayBuffer = nullptr;
m_defaultVertexArrayObject = nullptr;
m_boundVertexArrayObject = nullptr;
m_vertexAttrib0Buffer = nullptr;
m_currentProgram = nullptr;
m_framebufferBinding = nullptr;
m_readFramebufferBinding = nullptr;
m_renderbufferBinding = nullptr;
for (auto& textureUnit : m_textureUnits) {
textureUnit.texture2DBinding = nullptr;
textureUnit.textureCubeMapBinding = nullptr;
}
m_blackTexture2D = nullptr;
m_blackTextureCubeMap = nullptr;
if (!m_isPendingPolicyResolution) {
detachAndRemoveAllObjects();
destroyGraphicsContext3D();
m_contextGroup->removeContext(*this);
}
{
LockHolder lock(WebGLProgram::instancesMutex());
for (auto& entry : WebGLProgram::instances(lock)) {
if (entry.value == this) {
// Don't remove any WebGLProgram from the instances list, as they may still exist.
// Only remove the association with a WebGL context.
entry.value = nullptr;
}
}
}
}
void WebGLRenderingContextBase::destroyGraphicsContext3D()
{
if (m_isPendingPolicyResolution)
return;
removeActivityStateChangeObserver();
if (m_context) {
m_context->removeClient(*this);
m_context->setContextLostCallback(nullptr);
m_context->setErrorMessageCallback(nullptr);
m_context = nullptr;
}
}
void WebGLRenderingContextBase::markContextChanged()
{
if (m_framebufferBinding)
return;
m_context->markContextChanged();
m_layerCleared = false;
auto* canvas = htmlCanvas();
if (!canvas)
return;
RenderBox* renderBox = canvas->renderBox();
if (isAccelerated() && renderBox && renderBox->hasAcceleratedCompositing()) {
m_markedCanvasDirty = true;
htmlCanvas()->clearCopiedImage();
renderBox->contentChanged(CanvasPixelsChanged);
} else {
if (!m_markedCanvasDirty) {
m_markedCanvasDirty = true;
canvas->didDraw(FloatRect(FloatPoint(0, 0), clampedCanvasSize()));
}
}
}
void WebGLRenderingContextBase::markContextChangedAndNotifyCanvasObserver()
{
markContextChanged();
if (!isAccelerated())
return;
auto* canvas = htmlCanvas();
if (!canvas)
return;
RenderBox* renderBox = canvas->renderBox();
if (renderBox && renderBox->hasAcceleratedCompositing())
canvas->notifyObserversCanvasChanged(FloatRect(FloatPoint(0, 0), clampedCanvasSize()));
}
bool WebGLRenderingContextBase::clearIfComposited(GC3Dbitfield mask)
{
if (isContextLostOrPending())
return false;
if (!m_context->layerComposited() || m_layerCleared
|| m_attributes.preserveDrawingBuffer || (mask && m_framebufferBinding)
|| m_preventBufferClearForInspector)
return false;
auto contextAttributes = getContextAttributes();
ASSERT(contextAttributes);
// Determine if it's possible to combine the clear the user asked for and this clear.
bool combinedClear = mask && !m_scissorEnabled;
m_context->disable(GraphicsContext3D::SCISSOR_TEST);
if (combinedClear && (mask & GraphicsContext3D::COLOR_BUFFER_BIT))
m_context->clearColor(m_colorMask[0] ? m_clearColor[0] : 0,
m_colorMask[1] ? m_clearColor[1] : 0,
m_colorMask[2] ? m_clearColor[2] : 0,
m_colorMask[3] ? m_clearColor[3] : 0);
else
m_context->clearColor(0, 0, 0, 0);
m_context->colorMask(true, true, true, true);
GC3Dbitfield clearMask = GraphicsContext3D::COLOR_BUFFER_BIT;
if (contextAttributes->depth) {
if (!combinedClear || !m_depthMask || !(mask & GraphicsContext3D::DEPTH_BUFFER_BIT))
m_context->clearDepth(1.0f);
clearMask |= GraphicsContext3D::DEPTH_BUFFER_BIT;
m_context->depthMask(true);
}
if (contextAttributes->stencil) {
if (combinedClear && (mask & GraphicsContext3D::STENCIL_BUFFER_BIT))
m_context->clearStencil(m_clearStencil & m_stencilMask);
else
m_context->clearStencil(0);
clearMask |= GraphicsContext3D::STENCIL_BUFFER_BIT;
m_context->stencilMaskSeparate(GraphicsContext3D::FRONT, 0xFFFFFFFF);
}
if (m_framebufferBinding)
m_context->bindFramebuffer(GraphicsContext3D::FRAMEBUFFER, 0);
m_context->clear(clearMask);
restoreStateAfterClear();
if (m_framebufferBinding)
m_context->bindFramebuffer(GraphicsContext3D::FRAMEBUFFER, objectOrZero(m_framebufferBinding.get()));
m_layerCleared = true;
return combinedClear;
}
void WebGLRenderingContextBase::restoreStateAfterClear()
{
// Restore the state that the context set.
if (m_scissorEnabled)
m_context->enable(GraphicsContext3D::SCISSOR_TEST);
m_context->clearColor(m_clearColor[0], m_clearColor[1],
m_clearColor[2], m_clearColor[3]);
m_context->colorMask(m_colorMask[0], m_colorMask[1],
m_colorMask[2], m_colorMask[3]);
m_context->clearDepth(m_clearDepth);
m_context->clearStencil(m_clearStencil);
m_context->stencilMaskSeparate(GraphicsContext3D::FRONT, m_stencilMask);
m_context->depthMask(m_depthMask);
}
void WebGLRenderingContextBase::markLayerComposited()
{
if (isContextLostOrPending())
return;
m_context->markLayerComposited();
}
void WebGLRenderingContextBase::paintRenderingResultsToCanvas()
{
if (isContextLostOrPending())
return;
auto* canvas = htmlCanvas();
if (!canvas)
return;
if (canvas->document().printing())
canvas->clearPresentationCopy();
// Until the canvas is written to by the application, the clear that
// happened after it was composited should be ignored by the compositor.
if (m_context->layerComposited() && !m_attributes.preserveDrawingBuffer) {
m_context->paintCompositedResultsToCanvas(canvas->buffer());
canvas->makePresentationCopy();
} else
canvas->clearPresentationCopy();
clearIfComposited();
if (!m_markedCanvasDirty && !m_layerCleared)
return;
canvas->clearCopiedImage();
m_markedCanvasDirty = false;
m_context->paintRenderingResultsToCanvas(canvas->buffer());
}
RefPtr<ImageData> WebGLRenderingContextBase::paintRenderingResultsToImageData()
{
if (isContextLostOrPending())
return nullptr;
clearIfComposited();
return m_context->paintRenderingResultsToImageData();
}
WebGLTexture::TextureExtensionFlag WebGLRenderingContextBase::textureExtensionFlags() const
{
return static_cast<WebGLTexture::TextureExtensionFlag>((m_oesTextureFloatLinear ? WebGLTexture::TextureExtensionFloatLinearEnabled : 0) | (m_oesTextureHalfFloatLinear ? WebGLTexture::TextureExtensionHalfFloatLinearEnabled : 0));
}
void WebGLRenderingContextBase::reshape(int width, int height)
{
if (isContextLostOrPending())
return;
// This is an approximation because at WebGLRenderingContext level we don't
// know if the underlying FBO uses textures or renderbuffers.
GC3Dint maxSize = std::min(m_maxTextureSize, m_maxRenderbufferSize);
GC3Dint maxWidth = std::min(maxSize, m_maxViewportDims[0]);
GC3Dint maxHeight = std::min(maxSize, m_maxViewportDims[1]);
width = clamp(width, 1, maxWidth);
height = clamp(height, 1, maxHeight);
if (m_needsUpdate) {
auto* canvas = htmlCanvas();
if (canvas) {
RenderBox* renderBox = htmlCanvas()->renderBox();
if (renderBox && renderBox->hasAcceleratedCompositing())
renderBox->contentChanged(CanvasChanged);
}
m_needsUpdate = false;
}
// We don't have to mark the canvas as dirty, since the newly created image buffer will also start off
// clear (and this matches what reshape will do).
m_context->reshape(width, height);
auto& textureUnit = m_textureUnits[m_activeTextureUnit];
m_context->bindTexture(GraphicsContext3D::TEXTURE_2D, objectOrZero(textureUnit.texture2DBinding.get()));
if (textureUnit.texture2DBinding && textureUnit.texture2DBinding->needToUseBlackTexture(textureExtensionFlags()))
m_unrenderableTextureUnits.add(m_activeTextureUnit);
m_context->bindRenderbuffer(GraphicsContext3D::RENDERBUFFER, objectOrZero(m_renderbufferBinding.get()));
if (m_framebufferBinding)
m_context->bindFramebuffer(GraphicsContext3D::FRAMEBUFFER, objectOrZero(m_framebufferBinding.get()));
}
int WebGLRenderingContextBase::drawingBufferWidth() const
{
if (isContextLost())
return 0;
if (m_isPendingPolicyResolution && !m_hasRequestedPolicyResolution)
return 0;
return m_context->getInternalFramebufferSize().width();
}
int WebGLRenderingContextBase::drawingBufferHeight() const
{
if (isContextLost())
return 0;
if (m_isPendingPolicyResolution && !m_hasRequestedPolicyResolution)
return 0;
return m_context->getInternalFramebufferSize().height();
}
unsigned WebGLRenderingContextBase::sizeInBytes(GC3Denum type)
{
switch (type) {
case GraphicsContext3D::BYTE:
return sizeof(GC3Dbyte);
case GraphicsContext3D::UNSIGNED_BYTE:
return sizeof(GC3Dubyte);
case GraphicsContext3D::SHORT:
return sizeof(GC3Dshort);
case GraphicsContext3D::UNSIGNED_SHORT:
return sizeof(GC3Dushort);
case GraphicsContext3D::INT:
return sizeof(GC3Dint);
case GraphicsContext3D::UNSIGNED_INT:
return sizeof(GC3Duint);
case GraphicsContext3D::FLOAT:
return sizeof(GC3Dfloat);
}
ASSERT_NOT_REACHED();
return 0;
}
void WebGLRenderingContextBase::activeTexture(GC3Denum texture)
{
if (isContextLostOrPending())
return;
if (texture - GraphicsContext3D::TEXTURE0 >= m_textureUnits.size()) {
synthesizeGLError(GraphicsContext3D::INVALID_ENUM, "activeTexture", "texture unit out of range");
return;
}
m_activeTextureUnit = texture - GraphicsContext3D::TEXTURE0;
m_context->activeTexture(texture);
}
void WebGLRenderingContextBase::attachShader(WebGLProgram* program, WebGLShader* shader)
{
if (isContextLostOrPending() || !validateWebGLObject("attachShader", program) || !validateWebGLObject("attachShader", shader))
return;
if (!program->attachShader(shader)) {
synthesizeGLError(GraphicsContext3D::INVALID_OPERATION, "attachShader", "shader attachment already has shader");
return;
}
m_context->attachShader(objectOrZero(program), objectOrZero(shader));
shader->onAttached();
}
void WebGLRenderingContextBase::bindAttribLocation(WebGLProgram* program, GC3Duint index, const String& name)
{
if (isContextLostOrPending() || !validateWebGLObject("bindAttribLocation", program))
return;
if (!validateLocationLength("bindAttribLocation", name))
return;
if (!validateString("bindAttribLocation", name))
return;
if (isPrefixReserved(name)) {
synthesizeGLError(GraphicsContext3D::INVALID_OPERATION, "bindAttribLocation", "reserved prefix");
return;
}
if (index >= m_maxVertexAttribs) {
synthesizeGLError(GraphicsContext3D::INVALID_VALUE, "bindAttribLocation", "index out of range");
return;
}
m_context->bindAttribLocation(objectOrZero(program), index, name);
}
bool WebGLRenderingContextBase::checkObjectToBeBound(const char* functionName, WebGLObject* object, bool& deleted)
{
deleted = false;
if (isContextLostOrPending())
return false;
if (object) {
if (!object->validate(contextGroup(), *this)) {
synthesizeGLError(GraphicsContext3D::INVALID_OPERATION, functionName, "object not from this context");
return false;
}
deleted = !object->object();
}
return true;
}
void WebGLRenderingContextBase::bindBuffer(GC3Denum target, WebGLBuffer* buffer)
{
bool deleted;
if (!checkObjectToBeBound("bindBuffer", buffer, deleted))
return;
if (deleted)
buffer = nullptr;
if (buffer && buffer->getTarget() && buffer->getTarget() != target) {
synthesizeGLError(GraphicsContext3D::INVALID_OPERATION, "bindBuffer", "buffers can not be used with multiple targets");
return;
}
if (target == GraphicsContext3D::ARRAY_BUFFER)
m_boundArrayBuffer = buffer;
else if (target == GraphicsContext3D::ELEMENT_ARRAY_BUFFER)
m_boundVertexArrayObject->setElementArrayBuffer(buffer);
else {
bool success = false;
#if ENABLE(WEBGL2)
if (isWebGL2()) {
success = true;
switch (target) {
case GraphicsContext3D::COPY_READ_BUFFER:
m_boundCopyReadBuffer = buffer;
break;
case GraphicsContext3D::COPY_WRITE_BUFFER:
m_boundCopyWriteBuffer = buffer;
break;
case GraphicsContext3D::PIXEL_PACK_BUFFER:
m_boundPixelPackBuffer = buffer;
break;
case GraphicsContext3D::PIXEL_UNPACK_BUFFER:
m_boundPixelUnpackBuffer = buffer;
break;
case GraphicsContext3D::TRANSFORM_FEEDBACK_BUFFER:
m_boundTransformFeedbackBuffer = buffer;
break;
case GraphicsContext3D::UNIFORM_BUFFER:
m_boundUniformBuffer = buffer;
break;
default:
success = false;
break;
}
}
#endif
if (!success) {
synthesizeGLError(GraphicsContext3D::INVALID_ENUM, "bindBuffer", "invalid target");
return;
}
}
m_context->bindBuffer(target, objectOrZero(buffer));
if (buffer)
buffer->setTarget(target, isWebGL2());
}
void WebGLRenderingContextBase::bindFramebuffer(GC3Denum target, WebGLFramebuffer* buffer)
{
bool deleted;
if (!checkObjectToBeBound("bindFramebuffer", buffer, deleted))
return;
if (deleted)
buffer = 0;
bool isWebGL2DrawFramebufferTarget = false;
#if ENABLE(WEBGL2)
isWebGL2DrawFramebufferTarget = isWebGL2() && target == GraphicsContext3D::DRAW_FRAMEBUFFER;
#endif
bool success = false;
if (target == GraphicsContext3D::FRAMEBUFFER || isWebGL2DrawFramebufferTarget) {
m_framebufferBinding = buffer;
success = true;
}
#if ENABLE(WEBGL2)
if (isWebGL2() && (target == GraphicsContext3D::FRAMEBUFFER || target == GraphicsContext3D::READ_FRAMEBUFFER)) {
m_readFramebufferBinding = buffer;
success = true;
}
#endif
if (!success) {
synthesizeGLError(GraphicsContext3D::INVALID_ENUM, "bindFramebuffer", "invalid target");
return;
}
m_context->bindFramebuffer(target, objectOrZero(buffer));
if (buffer)
buffer->setHasEverBeenBound();
applyStencilTest();
}
void WebGLRenderingContextBase::bindRenderbuffer(GC3Denum target, WebGLRenderbuffer* renderBuffer)
{
bool deleted;
if (!checkObjectToBeBound("bindRenderbuffer", renderBuffer, deleted))
return;
if (deleted)
renderBuffer = 0;
if (target != GraphicsContext3D::RENDERBUFFER) {
synthesizeGLError(GraphicsContext3D::INVALID_ENUM, "bindRenderbuffer", "invalid target");
return;
}
m_renderbufferBinding = renderBuffer;
m_context->bindRenderbuffer(target, objectOrZero(renderBuffer));
if (renderBuffer)
renderBuffer->setHasEverBeenBound();
}
void WebGLRenderingContextBase::bindTexture(GC3Denum target, WebGLTexture* texture)
{
bool deleted;
if (!checkObjectToBeBound("bindTexture", texture, deleted))
return;
if (deleted)
texture = nullptr;
if (texture && texture->getTarget() && texture->getTarget() != target) {
synthesizeGLError(GraphicsContext3D::INVALID_OPERATION, "bindTexture", "textures can not be used with multiple targets");
return;
}
GC3Dint maxLevel = 0;
auto& textureUnit = m_textureUnits[m_activeTextureUnit];
if (target == GraphicsContext3D::TEXTURE_2D) {
textureUnit.texture2DBinding = texture;
maxLevel = m_maxTextureLevel;
if (texture && texture->needToUseBlackTexture(textureExtensionFlags()))
m_unrenderableTextureUnits.add(m_activeTextureUnit);
else
m_unrenderableTextureUnits.remove(m_activeTextureUnit);
} else if (target == GraphicsContext3D::TEXTURE_CUBE_MAP) {
textureUnit.textureCubeMapBinding = texture;
maxLevel = m_maxCubeMapTextureLevel;
if (texture && texture->needToUseBlackTexture(textureExtensionFlags()))
m_unrenderableTextureUnits.add(m_activeTextureUnit);
else
m_unrenderableTextureUnits.remove(m_activeTextureUnit);
} else {
synthesizeGLError(GraphicsContext3D::INVALID_ENUM, "bindTexture", "invalid target");
return;
}
m_context->bindTexture(target, objectOrZero(texture));
if (texture)
texture->setTarget(target, maxLevel);
// Note: previously we used to automatically set the TEXTURE_WRAP_R
// repeat mode to CLAMP_TO_EDGE for cube map textures, because OpenGL
// ES 2.0 doesn't expose this flag (a bug in the specification) and
// otherwise the application has no control over the seams in this
// dimension. However, it appears that supporting this properly on all
// platforms is fairly involved (will require a HashMap from texture ID
// in all ports), and we have not had any complaints, so the logic has
// been removed.
}
void WebGLRenderingContextBase::blendColor(GC3Dfloat red, GC3Dfloat green, GC3Dfloat blue, GC3Dfloat alpha)
{
if (isContextLostOrPending())
return;
m_context->blendColor(red, green, blue, alpha);
}
void WebGLRenderingContextBase::blendEquation(GC3Denum mode)
{
if (isContextLostOrPending() || !validateBlendEquation("blendEquation", mode))
return;
m_context->blendEquation(mode);
}
void WebGLRenderingContextBase::blendEquationSeparate(GC3Denum modeRGB, GC3Denum modeAlpha)
{
if (isContextLostOrPending() || !validateBlendEquation("blendEquation", modeRGB) || !validateBlendEquation("blendEquation", modeAlpha))
return;
m_context->blendEquationSeparate(modeRGB, modeAlpha);
}
void WebGLRenderingContextBase::blendFunc(GC3Denum sfactor, GC3Denum dfactor)
{
if (isContextLostOrPending() || !validateBlendFuncFactors("blendFunc", sfactor, dfactor))
return;
m_context->blendFunc(sfactor, dfactor);
}
void WebGLRenderingContextBase::blendFuncSeparate(GC3Denum srcRGB, GC3Denum dstRGB, GC3Denum srcAlpha, GC3Denum dstAlpha)
{
// Note: Alpha does not have the same restrictions as RGB.
if (isContextLostOrPending() || !validateBlendFuncFactors("blendFunc", srcRGB, dstRGB))
return;
m_context->blendFuncSeparate(srcRGB, dstRGB, srcAlpha, dstAlpha);
}
void WebGLRenderingContextBase::bufferData(GC3Denum target, long long size, GC3Denum usage)
{
if (isContextLostOrPending())
return;
RefPtr<WebGLBuffer> buffer = validateBufferDataParameters("bufferData", target, usage);
if (!buffer)
return;
if (size < 0) {
synthesizeGLError(GraphicsContext3D::INVALID_VALUE, "bufferData", "size < 0");
return;
}
if (!size) {
synthesizeGLError(GraphicsContext3D::INVALID_VALUE, "bufferData", "size == 0");
return;
}
if (!buffer->associateBufferData(static_cast<GC3Dsizeiptr>(size))) {
synthesizeGLError(GraphicsContext3D::INVALID_VALUE, "bufferData", "invalid buffer");
return;
}
m_context->moveErrorsToSyntheticErrorList();
m_context->bufferData(target, static_cast<GC3Dsizeiptr>(size), usage);
if (m_context->moveErrorsToSyntheticErrorList()) {
// The bufferData function failed. Tell the buffer it doesn't have the data it thinks it does.
buffer->disassociateBufferData();
}
}
void WebGLRenderingContextBase::bufferData(GC3Denum target, Optional<BufferDataSource>&& data, GC3Denum usage)
{
if (isContextLostOrPending())
return;
if (!data) {
synthesizeGLError(GraphicsContext3D::INVALID_VALUE, "bufferData", "null data");
return;
}
RefPtr<WebGLBuffer> buffer = validateBufferDataParameters("bufferData", target, usage);
if (!buffer)
return;
WTF::visit([&](auto& data) {
if (!buffer->associateBufferData(data.get())) {
this->synthesizeGLError(GraphicsContext3D::INVALID_VALUE, "bufferData", "invalid buffer");
return;
}
m_context->moveErrorsToSyntheticErrorList();
m_context->bufferData(target, data->byteLength(), data->data(), usage);
if (m_context->moveErrorsToSyntheticErrorList()) {
// The bufferData function failed. Tell the buffer it doesn't have the data it thinks it does.
buffer->disassociateBufferData();
}
}, data.value());
}
void WebGLRenderingContextBase::bufferSubData(GC3Denum target, long long offset, Optional<BufferDataSource>&& data)
{
if (isContextLostOrPending())
return;
RefPtr<WebGLBuffer> buffer = validateBufferDataParameters("bufferSubData", target, GraphicsContext3D::STATIC_DRAW);
if (!buffer)
return;
if (offset < 0) {
synthesizeGLError(GraphicsContext3D::INVALID_VALUE, "bufferSubData", "offset < 0");
return;
}
if (!data)
return;
WTF::visit([&](auto& data) {
if (!buffer->associateBufferSubData(static_cast<GC3Dintptr>(offset), data.get())) {
this->synthesizeGLError(GraphicsContext3D::INVALID_VALUE, "bufferSubData", "offset out of range");
return;
}
m_context->moveErrorsToSyntheticErrorList();
m_context->bufferSubData(target, static_cast<GC3Dintptr>(offset), data->byteLength(), data->data());
if (m_context->moveErrorsToSyntheticErrorList()) {
// The bufferSubData function failed. Tell the buffer it doesn't have the data it thinks it does.
buffer->disassociateBufferData();
}
}, data.value());
}
GC3Denum WebGLRenderingContextBase::checkFramebufferStatus(GC3Denum target)
{
if (isContextLostOrPending())
return GraphicsContext3D::FRAMEBUFFER_UNSUPPORTED;
if (target != GraphicsContext3D::FRAMEBUFFER) {
#if ENABLE(WEBGL2)
if (isWebGL1() || (target != GraphicsContext3D::DRAW_FRAMEBUFFER && target != GraphicsContext3D::READ_FRAMEBUFFER)) {
#endif
synthesizeGLError(GraphicsContext3D::INVALID_ENUM, "checkFramebufferStatus", "invalid target");
return 0;
#if ENABLE(WEBGL2)
}
#endif
}
auto targetFramebuffer = (target == GraphicsContext3D::READ_FRAMEBUFFER) ? m_readFramebufferBinding : m_framebufferBinding;
if (!targetFramebuffer || !targetFramebuffer->object())
return GraphicsContext3D::FRAMEBUFFER_COMPLETE;
const char* reason = "framebuffer incomplete";
GC3Denum result = targetFramebuffer->checkStatus(&reason);
if (result != GraphicsContext3D::FRAMEBUFFER_COMPLETE) {
String str = "WebGL: checkFramebufferStatus:" + String(reason);
printToConsole(MessageLevel::Warning, str);
return result;
}
result = m_context->checkFramebufferStatus(target);
return result;
}
void WebGLRenderingContextBase::clearColor(GC3Dfloat r, GC3Dfloat g, GC3Dfloat b, GC3Dfloat a)
{
if (isContextLostOrPending())
return;
if (std::isnan(r))
r = 0;
if (std::isnan(g))
g = 0;
if (std::isnan(b))
b = 0;
if (std::isnan(a))
a = 1;
m_clearColor[0] = r;
m_clearColor[1] = g;
m_clearColor[2] = b;
m_clearColor[3] = a;
m_context->clearColor(r, g, b, a);
}
void WebGLRenderingContextBase::clearDepth(GC3Dfloat depth)
{
if (isContextLostOrPending())
return;
m_clearDepth = depth;
m_context->clearDepth(depth);
}
void WebGLRenderingContextBase::clearStencil(GC3Dint s)
{
if (isContextLostOrPending())
return;
m_clearStencil = s;
m_context->clearStencil(s);
}
void WebGLRenderingContextBase::colorMask(GC3Dboolean red, GC3Dboolean green, GC3Dboolean blue, GC3Dboolean alpha)
{
if (isContextLostOrPending())
return;
m_colorMask[0] = red;
m_colorMask[1] = green;
m_colorMask[2] = blue;
m_colorMask[3] = alpha;
m_context->colorMask(red, green, blue, alpha);
}
void WebGLRenderingContextBase::compileShader(WebGLShader* shader)
{
if (isContextLostOrPending() || !validateWebGLObject("compileShader", shader))
return;
m_context->compileShader(objectOrZero(shader));
GC3Dint value;
m_context->getShaderiv(objectOrZero(shader), GraphicsContext3D::COMPILE_STATUS, &value);
shader->setValid(value);
auto* canvas = htmlCanvas();
if (canvas && m_synthesizedErrorsToConsole && !value) {
Ref<Inspector::ScriptCallStack> stackTrace = Inspector::createScriptCallStack(JSExecState::currentState());
for (auto& error : getShaderInfoLog(shader).split('\n'))
canvas->document().addConsoleMessage(std::make_unique<Inspector::ConsoleMessage>(MessageSource::Rendering, MessageType::Log, MessageLevel::Error, "WebGL: " + error, stackTrace.copyRef()));
}
}
void WebGLRenderingContextBase::compressedTexImage2D(GC3Denum target, GC3Dint level, GC3Denum internalformat, GC3Dsizei width, GC3Dsizei height, GC3Dint border, ArrayBufferView& data)
{
if (isContextLostOrPending())
return;
if (!validateTexFuncLevel("compressedTexImage2D", target, level))
return;
if (!validateCompressedTexFormat(internalformat)) {
synthesizeGLError(GraphicsContext3D::INVALID_ENUM, "compressedTexImage2D", "invalid internalformat");
return;
}
if (border) {
synthesizeGLError(GraphicsContext3D::INVALID_VALUE, "compressedTexImage2D", "border not 0");
return;
}
if (!validateCompressedTexDimensions("compressedTexImage2D", target, level, width, height, internalformat))
return;
if (!validateCompressedTexFuncData("compressedTexImage2D", width, height, internalformat, data))
return;
auto tex = validateTextureBinding("compressedTexImage2D", target, true);
if (!tex)
return;
if (!validateNPOTTextureLevel(width, height, level, "compressedTexImage2D"))
return;
m_context->moveErrorsToSyntheticErrorList();
m_context->compressedTexImage2D(target, level, internalformat, width, height,
border, data.byteLength(), data.baseAddress());
if (m_context->moveErrorsToSyntheticErrorList()) {
// The compressedTexImage2D function failed. Tell the WebGLTexture it doesn't have the data for this level.
tex->markInvalid(target, level);
return;
}
tex->setLevelInfo(target, level, internalformat, width, height, GraphicsContext3D::UNSIGNED_BYTE);
tex->setCompressed();
}
void WebGLRenderingContextBase::compressedTexSubImage2D(GC3Denum target, GC3Dint level, GC3Dint xoffset, GC3Dint yoffset, GC3Dsizei width, GC3Dsizei height, GC3Denum format, ArrayBufferView& data)
{
if (isContextLostOrPending())
return;
if (!validateTexFuncLevel("compressedTexSubImage2D", target, level))
return;
if (!validateCompressedTexFormat(format)) {
synthesizeGLError(GraphicsContext3D::INVALID_ENUM, "compressedTexSubImage2D", "invalid format");
return;
}
if (!validateCompressedTexFuncData("compressedTexSubImage2D", width, height, format, data))
return;
auto tex = validateTextureBinding("compressedTexSubImage2D", target, true);
if (!tex)
return;
if (format != tex->getInternalFormat(target, level)) {
synthesizeGLError(GraphicsContext3D::INVALID_OPERATION, "compressedTexSubImage2D", "format does not match texture format");
return;
}
if (!validateCompressedTexSubDimensions("compressedTexSubImage2D", target, level, xoffset, yoffset, width, height, format, tex.get()))
return;
graphicsContext3D()->compressedTexSubImage2D(target, level, xoffset, yoffset, width, height, format, data.byteLength(), data.baseAddress());
tex->setCompressed();
}
bool WebGLRenderingContextBase::validateSettableTexInternalFormat(const char* functionName, GC3Denum internalFormat)
{
switch (internalFormat) {
case GraphicsContext3D::DEPTH_COMPONENT:
case GraphicsContext3D::DEPTH_STENCIL:
case GraphicsContext3D::DEPTH_COMPONENT16:
case GraphicsContext3D::DEPTH_COMPONENT24:
case GraphicsContext3D::DEPTH_COMPONENT32F:
case GraphicsContext3D::DEPTH24_STENCIL8:
case GraphicsContext3D::DEPTH32F_STENCIL8:
case GraphicsContext3D::STENCIL_INDEX8:
synthesizeGLError(GraphicsContext3D::INVALID_OPERATION, functionName, "format can not be set, only rendered to");
return false;
default:
return true;
}
}
void WebGLRenderingContextBase::copyTexSubImage2D(GC3Denum target, GC3Dint level, GC3Dint xoffset, GC3Dint yoffset, GC3Dint x, GC3Dint y, GC3Dsizei width, GC3Dsizei height)
{
if (isContextLostOrPending())
return;
if (!validateTexFuncLevel("copyTexSubImage2D", target, level))
return;
auto tex = validateTextureBinding("copyTexSubImage2D", target, true);
if (!tex)
return;
if (!validateSize("copyTexSubImage2D", xoffset, yoffset) || !validateSize("copyTexSubImage2D", width, height))
return;
// Before checking if it is in the range, check if overflow happens first.
if (xoffset + width < 0 || yoffset + height < 0) {
synthesizeGLError(GraphicsContext3D::INVALID_VALUE, "copyTexSubImage2D", "bad dimensions");
return;
}
if (xoffset + width > tex->getWidth(target, level) || yoffset + height > tex->getHeight(target, level)) {
synthesizeGLError(GraphicsContext3D::INVALID_VALUE, "copyTexSubImage2D", "rectangle out of range");
return;
}
GC3Denum internalFormat = tex->getInternalFormat(target, level);
if (!validateSettableTexInternalFormat("copyTexSubImage2D", internalFormat))
return;
if (!isTexInternalFormatColorBufferCombinationValid(internalFormat, getBoundFramebufferColorFormat())) {
synthesizeGLError(GraphicsContext3D::INVALID_OPERATION, "copyTexSubImage2D", "framebuffer is incompatible format");
return;
}
const char* reason = "framebuffer incomplete";
if (m_framebufferBinding && !m_framebufferBinding->onAccess(graphicsContext3D(), &reason)) {
synthesizeGLError(GraphicsContext3D::INVALID_FRAMEBUFFER_OPERATION, "copyTexSubImage2D", reason);
return;
}
clearIfComposited();
GC3Dint clippedX, clippedY;
GC3Dsizei clippedWidth, clippedHeight;
if (clip2D(x, y, width, height, getBoundFramebufferWidth(), getBoundFramebufferHeight(), &clippedX, &clippedY, &clippedWidth, &clippedHeight)) {
GC3Denum format;
GC3Denum type;
if (!GraphicsContext3D::possibleFormatAndTypeForInternalFormat(tex->getInternalFormat(target, level), format, type)) {
synthesizeGLError(GraphicsContext3D::INVALID_ENUM, "copyTexSubImage2D", "Texture has unknown internal format");
return;
}
UniqueArray<unsigned char> zero;
if (width && height) {
unsigned size;
GC3Denum error = m_context->computeImageSizeInBytes(format, type, width, height, m_unpackAlignment, &size, nullptr);
if (error != GraphicsContext3D::NO_ERROR) {
synthesizeGLError(error, "copyTexSubImage2D", "bad dimensions");
return;
}
zero = makeUniqueArray<unsigned char>(size);
if (!zero) {
synthesizeGLError(GraphicsContext3D::INVALID_VALUE, "copyTexSubImage2D", "out of memory");
return;
}
memset(zero.get(), 0, size);
}
m_context->texSubImage2D(target, level, xoffset, yoffset, width, height, format, type, zero.get());
if (clippedWidth > 0 && clippedHeight > 0)
m_context->copyTexSubImage2D(target, level, xoffset + clippedX - x, yoffset + clippedY - y, clippedX, clippedY, clippedWidth, clippedHeight);
} else
m_context->copyTexSubImage2D(target, level, xoffset, yoffset, x, y, width, height);
}
RefPtr<WebGLBuffer> WebGLRenderingContextBase::createBuffer()
{
if (isContextLostOrPending())
return nullptr;
auto buffer = WebGLBuffer::create(*this);
addSharedObject(buffer.get());
return buffer;
}
RefPtr<WebGLFramebuffer> WebGLRenderingContextBase::createFramebuffer()
{
if (isContextLostOrPending())
return nullptr;
auto buffer = WebGLFramebuffer::create(*this);
addContextObject(buffer.get());
return buffer;
}
RefPtr<WebGLTexture> WebGLRenderingContextBase::createTexture()
{
if (isContextLostOrPending())
return nullptr;
auto texture = WebGLTexture::create(*this);
addSharedObject(texture.get());
return texture;
}
RefPtr<WebGLProgram> WebGLRenderingContextBase::createProgram()
{
if (isContextLostOrPending())
return nullptr;
auto program = WebGLProgram::create(*this);
addSharedObject(program.get());
InspectorInstrumentation::didCreateProgram(*this, program.get());
return program;
}
RefPtr<WebGLRenderbuffer> WebGLRenderingContextBase::createRenderbuffer()
{
if (isContextLostOrPending())
return nullptr;
auto buffer = WebGLRenderbuffer::create(*this);
addSharedObject(buffer.get());
return buffer;
}
RefPtr<WebGLShader> WebGLRenderingContextBase::createShader(GC3Denum type)
{
if (isContextLostOrPending())
return nullptr;
if (type != GraphicsContext3D::VERTEX_SHADER && type != GraphicsContext3D::FRAGMENT_SHADER) {
synthesizeGLError(GraphicsContext3D::INVALID_ENUM, "createShader", "invalid shader type");
return nullptr;
}
auto shader = WebGLShader::create(*this, type);
addSharedObject(shader.get());
return shader;
}
void WebGLRenderingContextBase::cullFace(GC3Denum mode)
{
if (isContextLostOrPending())
return;
m_context->cullFace(mode);
}
bool WebGLRenderingContextBase::deleteObject(WebGLObject* object)
{
if (isContextLostOrPending() || !object)
return false;
if (!object->validate(contextGroup(), *this)) {
synthesizeGLError(GraphicsContext3D::INVALID_OPERATION, "delete", "object does not belong to this context");
return false;
}
if (object->isDeleted())
return false;
if (object->object())
// We need to pass in context here because we want
// things in this context unbound.
object->deleteObject(graphicsContext3D());
return true;
}
void WebGLRenderingContextBase::deleteBuffer(WebGLBuffer* buffer)
{
if (!deleteObject(buffer))
return;
if (m_boundArrayBuffer == buffer)
m_boundArrayBuffer = nullptr;
m_boundVertexArrayObject->unbindBuffer(*buffer);
}
void WebGLRenderingContextBase::deleteFramebuffer(WebGLFramebuffer* framebuffer)
{
if (!deleteObject(framebuffer))
return;
#if ENABLE(WEBGL2)
if (isWebGL2() && framebuffer == m_readFramebufferBinding) {
m_readFramebufferBinding = nullptr;
m_context->bindFramebuffer(GraphicsContext3D::READ_FRAMEBUFFER, 0);
}
#endif
if (framebuffer == m_framebufferBinding) {
m_framebufferBinding = nullptr;
#if ENABLE(WEBGL2)
if (isWebGL2())
m_context->bindFramebuffer(GraphicsContext3D::DRAW_FRAMEBUFFER, 0);
else
#endif
m_context->bindFramebuffer(GraphicsContext3D::FRAMEBUFFER, 0);
}
}
void WebGLRenderingContextBase::deleteProgram(WebGLProgram* program)
{
if (program)
InspectorInstrumentation::willDeleteProgram(*this, *program);
deleteObject(program);
// We don't reset m_currentProgram to 0 here because the deletion of the
// current program is delayed.
}
void WebGLRenderingContextBase::deleteRenderbuffer(WebGLRenderbuffer* renderbuffer)
{
if (!deleteObject(renderbuffer))
return;
if (renderbuffer == m_renderbufferBinding)
m_renderbufferBinding = nullptr;
if (m_framebufferBinding)
m_framebufferBinding->removeAttachmentFromBoundFramebuffer(renderbuffer);
}
void WebGLRenderingContextBase::deleteShader(WebGLShader* shader)
{
deleteObject(shader);
}
void WebGLRenderingContextBase::deleteTexture(WebGLTexture* texture)
{
if (!deleteObject(texture))
return;
unsigned current = 0;
for (auto& textureUnit : m_textureUnits) {
if (texture == textureUnit.texture2DBinding) {
textureUnit.texture2DBinding = nullptr;
m_unrenderableTextureUnits.remove(current);
}
if (texture == textureUnit.textureCubeMapBinding) {
textureUnit.textureCubeMapBinding = nullptr;
m_unrenderableTextureUnits.remove(current);
}
++current;
}
if (m_framebufferBinding)
m_framebufferBinding->removeAttachmentFromBoundFramebuffer(texture);
}
void WebGLRenderingContextBase::depthFunc(GC3Denum func)
{
if (isContextLostOrPending())
return;
m_context->depthFunc(func);
}
void WebGLRenderingContextBase::depthMask(GC3Dboolean flag)
{
if (isContextLostOrPending())
return;
m_depthMask = flag;
m_context->depthMask(flag);
}
void WebGLRenderingContextBase::depthRange(GC3Dfloat zNear, GC3Dfloat zFar)
{
if (isContextLostOrPending())
return;
if (zNear > zFar) {
synthesizeGLError(GraphicsContext3D::INVALID_OPERATION, "depthRange", "zNear > zFar");
return;
}
m_context->depthRange(zNear, zFar);
}
void WebGLRenderingContextBase::detachShader(WebGLProgram* program, WebGLShader* shader)
{
if (isContextLostOrPending() || !validateWebGLObject("detachShader", program) || !validateWebGLObject("detachShader", shader))
return;
if (!program->detachShader(shader)) {
synthesizeGLError(GraphicsContext3D::INVALID_OPERATION, "detachShader", "shader not attached");
return;
}
m_context->detachShader(objectOrZero(program), objectOrZero(shader));
shader->onDetached(graphicsContext3D());
}
void WebGLRenderingContextBase::disable(GC3Denum cap)
{
if (isContextLostOrPending() || !validateCapability("disable", cap))
return;
if (cap == GraphicsContext3D::STENCIL_TEST) {
m_stencilEnabled = false;
applyStencilTest();
return;
}
if (cap == GraphicsContext3D::SCISSOR_TEST)
m_scissorEnabled = false;
m_context->disable(cap);
}
void WebGLRenderingContextBase::disableVertexAttribArray(GC3Duint index)
{
if (isContextLostOrPending())
return;
if (index >= m_maxVertexAttribs) {
synthesizeGLError(GraphicsContext3D::INVALID_VALUE, "disableVertexAttribArray", "index out of range");
return;
}
WebGLVertexArrayObjectBase::VertexAttribState& state = m_boundVertexArrayObject->getVertexAttribState(index);
state.enabled = false;
if (index > 0 || isGLES2Compliant())
m_context->disableVertexAttribArray(index);
}
bool WebGLRenderingContextBase::validateNPOTTextureLevel(GC3Dsizei width, GC3Dsizei height, GC3Dint level, const char* functionName)
{
if (!isGLES2NPOTStrict() && level && WebGLTexture::isNPOT(width, height)) {
synthesizeGLError(GraphicsContext3D::INVALID_VALUE, functionName, "level > 0 not power of 2");
return false;
}
return true;
}
bool WebGLRenderingContextBase::validateElementArraySize(GC3Dsizei count, GC3Denum type, GC3Dintptr offset)
{
RefPtr<WebGLBuffer> elementArrayBuffer = m_boundVertexArrayObject->getElementArrayBuffer();
if (!elementArrayBuffer)
return false;
if (offset < 0)
return false;
if (type == GraphicsContext3D::UNSIGNED_INT) {
// For an unsigned int array, offset must be divisible by 4 for alignment reasons.
if (offset % 4)
return false;
// Make uoffset an element offset.
offset /= 4;
GC3Dsizeiptr n = elementArrayBuffer->byteLength() / 4;
if (offset > n || count > n - offset)
return false;
} else if (type == GraphicsContext3D::UNSIGNED_SHORT) {
// For an unsigned short array, offset must be divisible by 2 for alignment reasons.
if (offset % 2)
return false;
// Make uoffset an element offset.
offset /= 2;
GC3Dsizeiptr n = elementArrayBuffer->byteLength() / 2;
if (offset > n || count > n - offset)
return false;
} else if (type == GraphicsContext3D::UNSIGNED_BYTE) {
GC3Dsizeiptr n = elementArrayBuffer->byteLength();
if (offset > n || count > n - offset)
return false;
}
return true;
}
bool WebGLRenderingContextBase::validateIndexArrayPrecise(GC3Dsizei count, GC3Denum type, GC3Dintptr offset, unsigned& numElementsRequired)
{
ASSERT(count >= 0 && offset >= 0);
unsigned maxIndex = 0;
RefPtr<WebGLBuffer> elementArrayBuffer = m_boundVertexArrayObject->getElementArrayBuffer();
if (!elementArrayBuffer)
return false;
if (!count) {
numElementsRequired = 0;
return true;
}
auto buffer = elementArrayBuffer->elementArrayBuffer();
if (!buffer)
return false;
switch (type) {
case GraphicsContext3D::UNSIGNED_INT:
maxIndex = getMaxIndex<GC3Duint>(buffer, offset, count);
break;
case GraphicsContext3D::UNSIGNED_SHORT:
maxIndex = getMaxIndex<GC3Dushort>(buffer, offset, count);
break;
case GraphicsContext3D::UNSIGNED_BYTE:
maxIndex = getMaxIndex<GC3Dubyte>(buffer, offset, count);
break;
}
// Then set the maxiumum index in the index array and make sure it is valid.
auto checkedNumElementsRequired = checkedAddAndMultiply<unsigned>(maxIndex, 1, 1);
if (!checkedNumElementsRequired)
return false;
numElementsRequired = checkedNumElementsRequired.value();
return true;
}
bool WebGLRenderingContextBase::validateVertexAttributes(unsigned elementCount, unsigned primitiveCount)
{
if (!m_currentProgram)
return false;
// Look in each enabled vertex attrib and check if they've been bound to a buffer.
for (unsigned i = 0; i < m_maxVertexAttribs; ++i) {
if (!m_boundVertexArrayObject->getVertexAttribState(i).validateBinding())
return false;
}
if (!elementCount)
return true;
// Look in each consumed vertex attrib (by the current program).
bool sawNonInstancedAttrib = false;
bool sawEnabledAttrib = false;
int numActiveAttribLocations = m_currentProgram->numActiveAttribLocations();
for (int i = 0; i < numActiveAttribLocations; ++i) {
int loc = m_currentProgram->getActiveAttribLocation(i);
if (loc >= 0 && loc < static_cast<int>(m_maxVertexAttribs)) {
const WebGLVertexArrayObjectBase::VertexAttribState& state = m_boundVertexArrayObject->getVertexAttribState(loc);
if (state.enabled) {
sawEnabledAttrib = true;
// Avoid off-by-one errors in numElements computation.
// For the last element, we will only touch the data for the
// element and nothing beyond it.
int bytesRemaining = static_cast<int>(state.bufferBinding->byteLength() - state.offset);
if (bytesRemaining <= 0)
return false;
unsigned numElements = 0;
ASSERT(state.stride > 0);
if (bytesRemaining >= state.bytesPerElement)
numElements = 1 + (bytesRemaining - state.bytesPerElement) / state.stride;
unsigned instancesRequired = 0;
if (state.divisor) {
instancesRequired = ceil(static_cast<float>(primitiveCount) / state.divisor);
if (instancesRequired > numElements)
return false;
} else {
sawNonInstancedAttrib = true;
if (elementCount > numElements)
return false;
}
}
}
}
if (!sawNonInstancedAttrib && sawEnabledAttrib)
return false;
bool usingSimulatedArrayBuffer = m_currentProgram->isUsingVertexAttrib0();
// Guard against access into non-existent buffers.
if (elementCount && !sawEnabledAttrib && !usingSimulatedArrayBuffer)
return false;
if (elementCount && sawEnabledAttrib) {
if (!m_boundArrayBuffer && !m_boundVertexArrayObject->getElementArrayBuffer()) {
if (usingSimulatedArrayBuffer) {
auto& state = m_boundVertexArrayObject->getVertexAttribState(0);
if (state.enabled && state.isBound()) {
if (state.bufferBinding->getTarget() == GraphicsContext3D::ARRAY_BUFFER || state.bufferBinding->getTarget() == GraphicsContext3D::ELEMENT_ARRAY_BUFFER)
return !!state.bufferBinding->byteLength();
}
}
return false;
}
}
return true;
}
bool WebGLRenderingContextBase::validateWebGLObject(const char* functionName, WebGLObject* object)
{
if (!object || !object->object()) {
synthesizeGLError(GraphicsContext3D::INVALID_VALUE, functionName, "no object or object deleted");
return false;
}
if (!object->validate(contextGroup(), *this)) {
synthesizeGLError(GraphicsContext3D::INVALID_OPERATION, functionName, "object does not belong to this context");
return false;
}
return true;
}
bool WebGLRenderingContextBase::validateDrawArrays(const char* functionName, GC3Denum mode, GC3Dint first, GC3Dsizei count, GC3Dsizei primitiveCount)
{
if (isContextLostOrPending() || !validateDrawMode(functionName, mode))
return false;
if (!validateStencilSettings(functionName))
return false;
if (first < 0 || count < 0) {
synthesizeGLError(GraphicsContext3D::INVALID_VALUE, functionName, "first or count < 0");
return false;
}
if (!count) {
markContextChanged();
return false;
}
if (primitiveCount < 0) {
synthesizeGLError(GraphicsContext3D::INVALID_VALUE, functionName, "primcount < 0");
return false;
}
// Ensure we have a valid rendering state.
Checked<GC3Dint, RecordOverflow> checkedSum = Checked<GC3Dint, RecordOverflow>(first) + Checked<GC3Dint, RecordOverflow>(count);
Checked<GC3Dint, RecordOverflow> checkedPrimitiveCount(primitiveCount);
if (checkedSum.hasOverflowed() || checkedPrimitiveCount.hasOverflowed() || !validateVertexAttributes(checkedSum.unsafeGet(), checkedPrimitiveCount.unsafeGet())) {
synthesizeGLError(GraphicsContext3D::INVALID_OPERATION, functionName, "attempt to access out of bounds arrays");
return false;
}
if (!validateSimulatedVertexAttrib0(checkedSum.unsafeGet() - 1)) {
synthesizeGLError(GraphicsContext3D::INVALID_OPERATION, functionName, "attempt to access outside the bounds of the simulated vertexAttrib0 array");
return false;
}
const char* reason = "framebuffer incomplete";
if (m_framebufferBinding && !m_framebufferBinding->onAccess(graphicsContext3D(), &reason)) {
synthesizeGLError(GraphicsContext3D::INVALID_FRAMEBUFFER_OPERATION, functionName, reason);
return false;
}
return true;
}
bool WebGLRenderingContextBase::validateDrawElements(const char* functionName, GC3Denum mode, GC3Dsizei count, GC3Denum type, long long offset, unsigned& numElements, GC3Dsizei primitiveCount)
{
if (isContextLostOrPending() || !validateDrawMode(functionName, mode))
return false;
if (!validateStencilSettings(functionName))
return false;
switch (type) {
case GraphicsContext3D::UNSIGNED_BYTE:
case GraphicsContext3D::UNSIGNED_SHORT:
break;
case GraphicsContext3D::UNSIGNED_INT:
if (m_oesElementIndexUint || isWebGL2())
break;
synthesizeGLError(GraphicsContext3D::INVALID_ENUM, functionName, "invalid type");
return false;
default:
synthesizeGLError(GraphicsContext3D::INVALID_ENUM, functionName, "invalid type");
return false;
}
if (count < 0 || offset < 0) {
synthesizeGLError(GraphicsContext3D::INVALID_VALUE, functionName, "count or offset < 0");
return false;
}
if (!count) {
markContextChanged();
return false;
}
if (primitiveCount < 0) {
synthesizeGLError(GraphicsContext3D::INVALID_VALUE, functionName, "primcount < 0");
return false;
}
if (!m_boundVertexArrayObject->getElementArrayBuffer()) {
synthesizeGLError(GraphicsContext3D::INVALID_OPERATION, functionName, "no ELEMENT_ARRAY_BUFFER bound");
return false;
}
// Ensure we have a valid rendering state.
if (!validateElementArraySize(count, type, static_cast<GC3Dintptr>(offset))) {
synthesizeGLError(GraphicsContext3D::INVALID_OPERATION, functionName, "request out of bounds for current ELEMENT_ARRAY_BUFFER");
return false;
}
if (!count)
return false;
Checked<GC3Dint, RecordOverflow> checkedCount(count);
Checked<GC3Dint, RecordOverflow> checkedPrimitiveCount(primitiveCount);
if (checkedCount.hasOverflowed() || checkedPrimitiveCount.hasOverflowed()) {
synthesizeGLError(GraphicsContext3D::INVALID_OPERATION, functionName, "attempt to access out of bounds arrays");
return false;
}
if (!validateIndexArrayConservative(type, numElements) || !validateVertexAttributes(numElements, checkedPrimitiveCount.unsafeGet())) {
if (!validateIndexArrayPrecise(checkedCount.unsafeGet(), type, static_cast<GC3Dintptr>(offset), numElements) || !validateVertexAttributes(numElements, checkedPrimitiveCount.unsafeGet())) {
synthesizeGLError(GraphicsContext3D::INVALID_OPERATION, functionName, "attempt to access out of bounds arrays");
return false;
}
}
if (!validateSimulatedVertexAttrib0(numElements)) {
synthesizeGLError(GraphicsContext3D::INVALID_OPERATION, functionName, "attempt to access outside the bounds of the simulated vertexAttrib0 array");
return false;
}
const char* reason = "framebuffer incomplete";
if (m_framebufferBinding && !m_framebufferBinding->onAccess(graphicsContext3D(), &reason)) {
synthesizeGLError(GraphicsContext3D::INVALID_FRAMEBUFFER_OPERATION, functionName, reason);
return false;
}
return true;
}
void WebGLRenderingContextBase::drawArrays(GC3Denum mode, GC3Dint first, GC3Dsizei count)
{
if (!validateDrawArrays("drawArrays", mode, first, count, 0))
return;
if (m_currentProgram && InspectorInstrumentation::isShaderProgramDisabled(*this, *m_currentProgram))
return;
clearIfComposited();
bool vertexAttrib0Simulated = false;
if (!isGLES2Compliant()) {
auto simulateVertexAttrib0Status = simulateVertexAttrib0(first + count - 1);
if (!simulateVertexAttrib0Status) {
// We were unable to simulate the attribute buffer.
synthesizeGLError(GraphicsContext3D::INVALID_OPERATION, "drawArrays", "unable to simulate vertexAttrib0 array");
return;
}
vertexAttrib0Simulated = simulateVertexAttrib0Status.value();
}
bool usesFallbackTexture = false;
if (!isGLES2NPOTStrict())
usesFallbackTexture = checkTextureCompleteness("drawArrays", true);
{
InspectorScopedShaderProgramHighlight scopedHighlight(*this, m_currentProgram.get());
m_context->drawArrays(mode, first, count);
}
if (!isGLES2Compliant() && vertexAttrib0Simulated)
restoreStatesAfterVertexAttrib0Simulation();
if (usesFallbackTexture)
checkTextureCompleteness("drawArrays", false);
markContextChangedAndNotifyCanvasObserver();
}
#if USE(OPENGL) && ENABLE(WEBGL2)
static GC3Duint getRestartIndex(GC3Denum type)
{
switch (type) {
case GraphicsContext3D::UNSIGNED_BYTE:
return std::numeric_limits<GC3Dubyte>::max();
case GraphicsContext3D::UNSIGNED_SHORT:
return std::numeric_limits<GC3Dushort>::max();
case GraphicsContext3D::UNSIGNED_INT:
return std::numeric_limits<GC3Duint>::max();
}
return 0;
}
#endif
void WebGLRenderingContextBase::drawElements(GC3Denum mode, GC3Dsizei count, GC3Denum type, long long offset)
{
unsigned numElements = 0;
if (!validateDrawElements("drawElements", mode, count, type, offset, numElements, 0))
return;
if (m_currentProgram && InspectorInstrumentation::isShaderProgramDisabled(*this, *m_currentProgram))
return;
clearIfComposited();
bool vertexAttrib0Simulated = false;
if (!isGLES2Compliant()) {
if (!numElements)
validateIndexArrayPrecise(count, type, static_cast<GC3Dintptr>(offset), numElements);
auto simulateVertexAttrib0Status = simulateVertexAttrib0(numElements);
if (!simulateVertexAttrib0Status) {
// We were unable to simulate the attribute buffer.
synthesizeGLError(GraphicsContext3D::INVALID_OPERATION, "drawElements", "unable to simulate vertexAttrib0 array");
return;
}
vertexAttrib0Simulated = simulateVertexAttrib0Status.value();
}
bool usesFallbackTexture = false;
if (!isGLES2NPOTStrict())
usesFallbackTexture = checkTextureCompleteness("drawElements", true);
#if USE(OPENGL) && ENABLE(WEBGL2)
if (isWebGL2())
m_context->primitiveRestartIndex(getRestartIndex(type));
#endif
{
InspectorScopedShaderProgramHighlight scopedHighlight(*this, m_currentProgram.get());
m_context->drawElements(mode, count, type, static_cast<GC3Dintptr>(offset));
}
if (!isGLES2Compliant() && vertexAttrib0Simulated)
restoreStatesAfterVertexAttrib0Simulation();
if (usesFallbackTexture)
checkTextureCompleteness("drawElements", false);
markContextChangedAndNotifyCanvasObserver();
}
void WebGLRenderingContextBase::enable(GC3Denum cap)
{
if (isContextLostOrPending() || !validateCapability("enable", cap))
return;
if (cap == GraphicsContext3D::STENCIL_TEST) {
m_stencilEnabled = true;
applyStencilTest();
return;
}
if (cap == GraphicsContext3D::SCISSOR_TEST)
m_scissorEnabled = true;
m_context->enable(cap);
}
void WebGLRenderingContextBase::enableVertexAttribArray(GC3Duint index)
{
if (isContextLostOrPending())
return;
if (index >= m_maxVertexAttribs) {
synthesizeGLError(GraphicsContext3D::INVALID_VALUE, "enableVertexAttribArray", "index out of range");
return;
}
WebGLVertexArrayObjectBase::VertexAttribState& state = m_boundVertexArrayObject->getVertexAttribState(index);
state.enabled = true;
m_context->enableVertexAttribArray(index);
}
void WebGLRenderingContextBase::finish()
{
if (isContextLostOrPending())
return;
m_context->finish();
}
void WebGLRenderingContextBase::flush()
{
if (isContextLostOrPending())
return;
m_context->flush();
}
void WebGLRenderingContextBase::framebufferRenderbuffer(GC3Denum target, GC3Denum attachment, GC3Denum renderbuffertarget, WebGLRenderbuffer* buffer)
{
if (isContextLostOrPending() || !validateFramebufferFuncParameters("framebufferRenderbuffer", target, attachment))
return;
if (renderbuffertarget != GraphicsContext3D::RENDERBUFFER) {
synthesizeGLError(GraphicsContext3D::INVALID_ENUM, "framebufferRenderbuffer", "invalid target");
return;
}
if (buffer && !buffer->validate(contextGroup(), *this)) {
synthesizeGLError(GraphicsContext3D::INVALID_OPERATION, "framebufferRenderbuffer", "no buffer or buffer not from this context");
return;
}
auto targetFramebuffer = (target == GraphicsContext3D::READ_FRAMEBUFFER) ? m_readFramebufferBinding : m_framebufferBinding;
// Don't allow the default framebuffer to be mutated; all current
// implementations use an FBO internally in place of the default
// FBO.
if (!targetFramebuffer || !targetFramebuffer->object()) {
synthesizeGLError(GraphicsContext3D::INVALID_OPERATION, "framebufferRenderbuffer", "no framebuffer bound");
return;
}
Platform3DObject bufferObject = objectOrZero(buffer);
switch (attachment) {
case GraphicsContext3D::DEPTH_STENCIL_ATTACHMENT:
m_context->framebufferRenderbuffer(target, GraphicsContext3D::DEPTH_ATTACHMENT, renderbuffertarget, bufferObject);
m_context->framebufferRenderbuffer(target, GraphicsContext3D::STENCIL_ATTACHMENT, renderbuffertarget, bufferObject);
break;
default:
m_context->framebufferRenderbuffer(target, attachment, renderbuffertarget, bufferObject);
}
targetFramebuffer->setAttachmentForBoundFramebuffer(attachment, buffer);
applyStencilTest();
}
void WebGLRenderingContextBase::framebufferTexture2D(GC3Denum target, GC3Denum attachment, GC3Denum textarget, WebGLTexture* texture, GC3Dint level)
{
if (isContextLostOrPending() || !validateFramebufferFuncParameters("framebufferTexture2D", target, attachment))
return;
if (level && isWebGL1()) {
synthesizeGLError(GraphicsContext3D::INVALID_VALUE, "framebufferTexture2D", "level not 0");
return;
}
if (texture && !texture->validate(contextGroup(), *this)) {
synthesizeGLError(GraphicsContext3D::INVALID_OPERATION, "framebufferTexture2D", "no texture or texture not from this context");
return;
}
auto targetFramebuffer = (target == GraphicsContext3D::READ_FRAMEBUFFER) ? m_readFramebufferBinding : m_framebufferBinding;
// Don't allow the default framebuffer to be mutated; all current
// implementations use an FBO internally in place of the default
// FBO.
if (!targetFramebuffer || !targetFramebuffer->object()) {
synthesizeGLError(GraphicsContext3D::INVALID_OPERATION, "framebufferTexture2D", "no framebuffer bound");
return;
}
Platform3DObject textureObject = objectOrZero(texture);
switch (attachment) {
case GraphicsContext3D::DEPTH_STENCIL_ATTACHMENT:
m_context->framebufferTexture2D(target, GraphicsContext3D::DEPTH_ATTACHMENT, textarget, textureObject, level);
m_context->framebufferTexture2D(target, GraphicsContext3D::STENCIL_ATTACHMENT, textarget, textureObject, level);
break;
case GraphicsContext3D::DEPTH_ATTACHMENT:
m_context->framebufferTexture2D(target, attachment, textarget, textureObject, level);
break;
case GraphicsContext3D::STENCIL_ATTACHMENT:
m_context->framebufferTexture2D(target, attachment, textarget, textureObject, level);
break;
default:
m_context->framebufferTexture2D(target, attachment, textarget, textureObject, level);
}
targetFramebuffer->setAttachmentForBoundFramebuffer(attachment, textarget, texture, level);
applyStencilTest();
}
void WebGLRenderingContextBase::frontFace(GC3Denum mode)
{
if (isContextLostOrPending())
return;
m_context->frontFace(mode);
}
void WebGLRenderingContextBase::generateMipmap(GC3Denum target)
{
if (isContextLostOrPending())
return;
auto tex = validateTextureBinding("generateMipmap", target, false);
if (!tex)
return;
if (!tex->canGenerateMipmaps()) {
synthesizeGLError(GraphicsContext3D::INVALID_OPERATION, "generateMipmap", "level 0 not power of 2 or not all the same size");
return;
}
// FIXME: https://bugs.webkit.org/show_bug.cgi?id=123916. Compressed textures should be allowed in WebGL 2:
if (tex->isCompressed()) {
synthesizeGLError(GraphicsContext3D::INVALID_OPERATION, "generateMipmap", "trying to generate mipmaps from compressed texture");
return;
}
if (!validateSettableTexInternalFormat("generateMipmap", tex->getInternalFormat(target, 0)))
return;
// generateMipmap won't work properly if minFilter is not NEAREST_MIPMAP_LINEAR
// on Mac. Remove the hack once this driver bug is fixed.
#if OS(DARWIN)
bool needToResetMinFilter = false;
if (tex->getMinFilter() != GraphicsContext3D::NEAREST_MIPMAP_LINEAR) {
m_context->texParameteri(target, GraphicsContext3D::TEXTURE_MIN_FILTER, GraphicsContext3D::NEAREST_MIPMAP_LINEAR);
needToResetMinFilter = true;
}
#endif
m_context->generateMipmap(target);
#if OS(DARWIN)
if (needToResetMinFilter)
m_context->texParameteri(target, GraphicsContext3D::TEXTURE_MIN_FILTER, tex->getMinFilter());
#endif
tex->generateMipmapLevelInfo();
}
RefPtr<WebGLActiveInfo> WebGLRenderingContextBase::getActiveAttrib(WebGLProgram* program, GC3Duint index)
{
if (isContextLostOrPending() || !validateWebGLObject("getActiveAttrib", program))
return nullptr;
ActiveInfo info;
if (!m_context->getActiveAttrib(objectOrZero(program), index, info))
return nullptr;
LOG(WebGL, "Returning active attribute %d: %s", index, info.name.utf8().data());
return WebGLActiveInfo::create(info.name, info.type, info.size);
}
RefPtr<WebGLActiveInfo> WebGLRenderingContextBase::getActiveUniform(WebGLProgram* program, GC3Duint index)
{
if (isContextLostOrPending() || !validateWebGLObject("getActiveUniform", program))
return nullptr;
ActiveInfo info;
if (!m_context->getActiveUniform(objectOrZero(program), index, info))
return nullptr;
if (!isGLES2Compliant())
if (info.size > 1 && !info.name.endsWith("[0]"))
info.name.append("[0]");
LOG(WebGL, "Returning active uniform %d: %s", index, info.name.utf8().data());
return WebGLActiveInfo::create(info.name, info.type, info.size);
}
Optional<Vector<RefPtr<WebGLShader>>> WebGLRenderingContextBase::getAttachedShaders(WebGLProgram* program)
{
if (isContextLostOrPending() || !validateWebGLObject("getAttachedShaders", program))
return WTF::nullopt;
const GC3Denum shaderTypes[] = {
GraphicsContext3D::VERTEX_SHADER,
GraphicsContext3D::FRAGMENT_SHADER
};
Vector<RefPtr<WebGLShader>> shaderObjects;
for (auto shaderType : shaderTypes) {
RefPtr<WebGLShader> shader = program->getAttachedShader(shaderType);
if (shader)
shaderObjects.append(shader);
}
return shaderObjects;
}
GC3Dint WebGLRenderingContextBase::getAttribLocation(WebGLProgram* program, const String& name)
{
if (isContextLostOrPending() || !validateWebGLObject("getAttribLocation", program))
return -1;
if (!validateLocationLength("getAttribLocation", name))
return -1;
if (!validateString("getAttribLocation", name))
return -1;
if (isPrefixReserved(name))
return -1;
if (!program->getLinkStatus()) {
synthesizeGLError(GraphicsContext3D::INVALID_OPERATION, "getAttribLocation", "program not linked");
return -1;
}
return m_context->getAttribLocation(objectOrZero(program), name);
}
WebGLAny WebGLRenderingContextBase::getBufferParameter(GC3Denum target, GC3Denum pname)
{
if (isContextLostOrPending())
return nullptr;
bool valid = false;
if (target == GraphicsContext3D::ARRAY_BUFFER || target == GraphicsContext3D::ELEMENT_ARRAY_BUFFER)
valid = true;
#if ENABLE(WEBGL2)
if (isWebGL2()) {
switch (target) {
case GraphicsContext3D::COPY_READ_BUFFER:
case GraphicsContext3D::COPY_WRITE_BUFFER:
case GraphicsContext3D::PIXEL_PACK_BUFFER:
case GraphicsContext3D::PIXEL_UNPACK_BUFFER:
case GraphicsContext3D::TRANSFORM_FEEDBACK_BUFFER:
case GraphicsContext3D::UNIFORM_BUFFER:
valid = true;
}
}
#endif
if (!valid) {
synthesizeGLError(GraphicsContext3D::INVALID_ENUM, "getBufferParameter", "invalid target");
return nullptr;
}
if (pname != GraphicsContext3D::BUFFER_SIZE && pname != GraphicsContext3D::BUFFER_USAGE) {
synthesizeGLError(GraphicsContext3D::INVALID_ENUM, "getBufferParameter", "invalid parameter name");
return nullptr;
}
GC3Dint value = 0;
m_context->getBufferParameteriv(target, pname, &value);
if (pname == GraphicsContext3D::BUFFER_SIZE)
return value;
return static_cast<unsigned>(value);
}
Optional<WebGLContextAttributes> WebGLRenderingContextBase::getContextAttributes()
{
if (isContextLostOrPending())
return WTF::nullopt;
// Also, we need to enforce requested values of "false" for depth
// and stencil, regardless of the properties of the underlying
// GraphicsContext3D.
auto attributes = m_context->getContextAttributes();
if (!m_attributes.depth)
attributes.depth = false;
if (!m_attributes.stencil)
attributes.stencil = false;
return attributes;
}
GC3Denum WebGLRenderingContextBase::getError()
{
if (m_isPendingPolicyResolution)
return GraphicsContext3D::NO_ERROR;
return m_context->getError();
}
WebGLAny WebGLRenderingContextBase::getProgramParameter(WebGLProgram* program, GC3Denum pname)
{
if (isContextLostOrPending() || !validateWebGLObject("getProgramParameter", program))
return nullptr;
GC3Dint value = 0;
switch (pname) {
case GraphicsContext3D::DELETE_STATUS:
return program->isDeleted();
case GraphicsContext3D::VALIDATE_STATUS:
m_context->getProgramiv(objectOrZero(program), pname, &value);
return static_cast<bool>(value);
case GraphicsContext3D::LINK_STATUS:
return program->getLinkStatus();
case GraphicsContext3D::ATTACHED_SHADERS:
m_context->getProgramiv(objectOrZero(program), pname, &value);
return value;
case GraphicsContext3D::ACTIVE_ATTRIBUTES:
case GraphicsContext3D::ACTIVE_UNIFORMS:
#if USE(ANGLE)
m_context->getProgramiv(objectOrZero(program), pname, &value);
#else
m_context->getNonBuiltInActiveSymbolCount(objectOrZero(program), pname, &value);
#endif // USE(ANGLE)
return value;
default:
synthesizeGLError(GraphicsContext3D::INVALID_ENUM, "getProgramParameter", "invalid parameter name");
return nullptr;
}
}
String WebGLRenderingContextBase::getProgramInfoLog(WebGLProgram* program)
{
if (isContextLostOrPending() || !validateWebGLObject("getProgramInfoLog", program))
return String();
return ensureNotNull(m_context->getProgramInfoLog(objectOrZero(program)));
}
WebGLAny WebGLRenderingContextBase::getRenderbufferParameter(GC3Denum target, GC3Denum pname)
{
if (isContextLostOrPending())
return nullptr;
if (target != GraphicsContext3D::RENDERBUFFER) {
synthesizeGLError(GraphicsContext3D::INVALID_ENUM, "getRenderbufferParameter", "invalid target");
return nullptr;
}
if (!m_renderbufferBinding || !m_renderbufferBinding->object()) {
synthesizeGLError(GraphicsContext3D::INVALID_OPERATION, "getRenderbufferParameter", "no renderbuffer bound");
return nullptr;
}
if (m_renderbufferBinding->getInternalFormat() == GraphicsContext3D::DEPTH_STENCIL
&& !m_renderbufferBinding->isValid()) {
ASSERT(!isDepthStencilSupported());
int value = 0;
switch (pname) {
case GraphicsContext3D::RENDERBUFFER_WIDTH:
value = m_renderbufferBinding->getWidth();
break;
case GraphicsContext3D::RENDERBUFFER_HEIGHT:
value = m_renderbufferBinding->getHeight();
break;
case GraphicsContext3D::RENDERBUFFER_RED_SIZE:
case GraphicsContext3D::RENDERBUFFER_GREEN_SIZE:
case GraphicsContext3D::RENDERBUFFER_BLUE_SIZE:
case GraphicsContext3D::RENDERBUFFER_ALPHA_SIZE:
value = 0;
break;
case GraphicsContext3D::RENDERBUFFER_DEPTH_SIZE:
value = 24;
break;
case GraphicsContext3D::RENDERBUFFER_STENCIL_SIZE:
value = 8;
break;
case GraphicsContext3D::RENDERBUFFER_INTERNAL_FORMAT:
return m_renderbufferBinding->getInternalFormat();
default:
synthesizeGLError(GraphicsContext3D::INVALID_ENUM, "getRenderbufferParameter", "invalid parameter name");
return nullptr;
}
return value;
}
GC3Dint value = 0;
switch (pname) {
case GraphicsContext3D::RENDERBUFFER_WIDTH:
case GraphicsContext3D::RENDERBUFFER_HEIGHT:
case GraphicsContext3D::RENDERBUFFER_RED_SIZE:
case GraphicsContext3D::RENDERBUFFER_GREEN_SIZE:
case GraphicsContext3D::RENDERBUFFER_BLUE_SIZE:
case GraphicsContext3D::RENDERBUFFER_ALPHA_SIZE:
case GraphicsContext3D::RENDERBUFFER_DEPTH_SIZE:
case GraphicsContext3D::RENDERBUFFER_STENCIL_SIZE:
m_context->getRenderbufferParameteriv(target, pname, &value);
return value;
case GraphicsContext3D::RENDERBUFFER_INTERNAL_FORMAT:
return m_renderbufferBinding->getInternalFormat();
default:
synthesizeGLError(GraphicsContext3D::INVALID_ENUM, "getRenderbufferParameter", "invalid parameter name");
return nullptr;
}
}
WebGLAny WebGLRenderingContextBase::getShaderParameter(WebGLShader* shader, GC3Denum pname)
{
if (isContextLostOrPending() || !validateWebGLObject("getShaderParameter", shader))
return nullptr;
GC3Dint value = 0;
switch (pname) {
case GraphicsContext3D::DELETE_STATUS:
return shader->isDeleted();
case GraphicsContext3D::COMPILE_STATUS:
m_context->getShaderiv(objectOrZero(shader), pname, &value);
return static_cast<bool>(value);
case GraphicsContext3D::SHADER_TYPE:
m_context->getShaderiv(objectOrZero(shader), pname, &value);
return static_cast<unsigned>(value);
default:
synthesizeGLError(GraphicsContext3D::INVALID_ENUM, "getShaderParameter", "invalid parameter name");
return nullptr;
}
}
String WebGLRenderingContextBase::getShaderInfoLog(WebGLShader* shader)
{
if (isContextLostOrPending() || !validateWebGLObject("getShaderInfoLog", shader))
return String();
return ensureNotNull(m_context->getShaderInfoLog(objectOrZero(shader)));
}
RefPtr<WebGLShaderPrecisionFormat> WebGLRenderingContextBase::getShaderPrecisionFormat(GC3Denum shaderType, GC3Denum precisionType)
{
if (isContextLostOrPending())
return nullptr;
switch (shaderType) {
case GraphicsContext3D::VERTEX_SHADER:
case GraphicsContext3D::FRAGMENT_SHADER:
break;
default:
synthesizeGLError(GraphicsContext3D::INVALID_ENUM, "getShaderPrecisionFormat", "invalid shader type");
return nullptr;
}
switch (precisionType) {
case GraphicsContext3D::LOW_FLOAT:
case GraphicsContext3D::MEDIUM_FLOAT:
case GraphicsContext3D::HIGH_FLOAT:
case GraphicsContext3D::LOW_INT:
case GraphicsContext3D::MEDIUM_INT:
case GraphicsContext3D::HIGH_INT:
break;
default:
synthesizeGLError(GraphicsContext3D::INVALID_ENUM, "getShaderPrecisionFormat", "invalid precision type");
return nullptr;
}
GC3Dint range[2] = {0, 0};
GC3Dint precision = 0;
m_context->getShaderPrecisionFormat(shaderType, precisionType, range, &precision);
return WebGLShaderPrecisionFormat::create(range[0], range[1], precision);
}
String WebGLRenderingContextBase::getShaderSource(WebGLShader* shader)
{
if (isContextLostOrPending() || !validateWebGLObject("getShaderSource", shader))
return String();
return ensureNotNull(shader->getSource());
}
WebGLAny WebGLRenderingContextBase::getTexParameter(GC3Denum target, GC3Denum pname)
{
if (isContextLostOrPending())
return nullptr;
auto tex = validateTextureBinding("getTexParameter", target, false);
if (!tex)
return nullptr;
GC3Dint value = 0;
switch (pname) {
case GraphicsContext3D::TEXTURE_MAG_FILTER:
case GraphicsContext3D::TEXTURE_MIN_FILTER:
case GraphicsContext3D::TEXTURE_WRAP_S:
case GraphicsContext3D::TEXTURE_WRAP_T:
m_context->getTexParameteriv(target, pname, &value);
return static_cast<unsigned>(value);
case Extensions3D::TEXTURE_MAX_ANISOTROPY_EXT: // EXT_texture_filter_anisotropic
if (m_extTextureFilterAnisotropic) {
m_context->getTexParameteriv(target, pname, &value);
return static_cast<unsigned>(value);
}
synthesizeGLError(GraphicsContext3D::INVALID_ENUM, "getTexParameter", "invalid parameter name, EXT_texture_filter_anisotropic not enabled");
return nullptr;
default:
synthesizeGLError(GraphicsContext3D::INVALID_ENUM, "getTexParameter", "invalid parameter name");
return nullptr;
}
}
WebGLAny WebGLRenderingContextBase::getUniform(WebGLProgram* program, const WebGLUniformLocation* uniformLocation)
{
if (isContextLostOrPending() || !validateWebGLObject("getUniform", program))
return nullptr;
if (!uniformLocation || uniformLocation->program() != program) {
synthesizeGLError(GraphicsContext3D::INVALID_OPERATION, "getUniform", "no uniformlocation or not valid for this program");
return nullptr;
}
GC3Dint location = uniformLocation->location();
GC3Denum baseType;
unsigned length;
switch (uniformLocation->type()) {
case GraphicsContext3D::BOOL:
baseType = GraphicsContext3D::BOOL;
length = 1;
break;
case GraphicsContext3D::BOOL_VEC2:
baseType = GraphicsContext3D::BOOL;
length = 2;
break;
case GraphicsContext3D::BOOL_VEC3:
baseType = GraphicsContext3D::BOOL;
length = 3;
break;
case GraphicsContext3D::BOOL_VEC4:
baseType = GraphicsContext3D::BOOL;
length = 4;
break;
case GraphicsContext3D::INT:
baseType = GraphicsContext3D::INT;
length = 1;
break;
case GraphicsContext3D::INT_VEC2:
baseType = GraphicsContext3D::INT;
length = 2;
break;
case GraphicsContext3D::INT_VEC3:
baseType = GraphicsContext3D::INT;
length = 3;
break;
case GraphicsContext3D::INT_VEC4:
baseType = GraphicsContext3D::INT;
length = 4;
break;
case GraphicsContext3D::FLOAT:
baseType = GraphicsContext3D::FLOAT;
length = 1;
break;
case GraphicsContext3D::FLOAT_VEC2:
baseType = GraphicsContext3D::FLOAT;
length = 2;
break;
case GraphicsContext3D::FLOAT_VEC3:
baseType = GraphicsContext3D::FLOAT;
length = 3;
break;
case GraphicsContext3D::FLOAT_VEC4:
baseType = GraphicsContext3D::FLOAT;
length = 4;
break;
case GraphicsContext3D::FLOAT_MAT2:
baseType = GraphicsContext3D::FLOAT;
length = 4;
break;
case GraphicsContext3D::FLOAT_MAT3:
baseType = GraphicsContext3D::FLOAT;
length = 9;
break;
case GraphicsContext3D::FLOAT_MAT4:
baseType = GraphicsContext3D::FLOAT;
length = 16;
break;
case GraphicsContext3D::SAMPLER_2D:
case GraphicsContext3D::SAMPLER_CUBE:
baseType = GraphicsContext3D::INT;
length = 1;
break;
default:
// Can't handle this type
synthesizeGLError(GraphicsContext3D::INVALID_VALUE, "getUniform", "unhandled type");
return nullptr;
}
switch (baseType) {
case GraphicsContext3D::FLOAT: {
GC3Dfloat value[16] = {0};
if (m_isRobustnessEXTSupported)
m_context->getExtensions().getnUniformfvEXT(objectOrZero(program), location, 16 * sizeof(GC3Dfloat), value);
else
m_context->getUniformfv(objectOrZero(program), location, value);
if (length == 1)
return value[0];
return Float32Array::tryCreate(value, length);
}
case GraphicsContext3D::INT: {
GC3Dint value[4] = {0};
if (m_isRobustnessEXTSupported)
m_context->getExtensions().getnUniformivEXT(objectOrZero(program), location, 4 * sizeof(GC3Dint), value);
else
m_context->getUniformiv(objectOrZero(program), location, value);
if (length == 1)
return value[0];
return Int32Array::tryCreate(value, length);
}
case GraphicsContext3D::BOOL: {
GC3Dint value[4] = {0};
if (m_isRobustnessEXTSupported)
m_context->getExtensions().getnUniformivEXT(objectOrZero(program), location, 4 * sizeof(GC3Dint), value);
else
m_context->getUniformiv(objectOrZero(program), location, value);
if (length > 1) {
Vector<bool> vector(length);
for (unsigned j = 0; j < length; j++)
vector[j] = value[j];
return vector;
}
return static_cast<bool>(value[0]);
}
default:
notImplemented();
}
// If we get here, something went wrong in our unfortunately complex logic above
synthesizeGLError(GraphicsContext3D::INVALID_VALUE, "getUniform", "unknown error");
return nullptr;
}
RefPtr<WebGLUniformLocation> WebGLRenderingContextBase::getUniformLocation(WebGLProgram* program, const String& name)
{
if (isContextLostOrPending() || !validateWebGLObject("getUniformLocation", program))
return nullptr;
if (!validateLocationLength("getUniformLocation", name))
return nullptr;
if (!validateString("getUniformLocation", name))
return nullptr;
if (isPrefixReserved(name))
return nullptr;
if (!program->getLinkStatus()) {
synthesizeGLError(GraphicsContext3D::INVALID_OPERATION, "getUniformLocation", "program not linked");
return nullptr;
}
GC3Dint uniformLocation = m_context->getUniformLocation(objectOrZero(program), name);
if (uniformLocation == -1)
return nullptr;
GC3Dint activeUniforms = 0;
#if USE(ANGLE)
m_context->getProgramiv(objectOrZero(program), GraphicsContext3D::ACTIVE_UNIFORMS, &activeUniforms);
#else
m_context->getNonBuiltInActiveSymbolCount(objectOrZero(program), GraphicsContext3D::ACTIVE_UNIFORMS, &activeUniforms);
#endif
for (GC3Dint i = 0; i < activeUniforms; i++) {
ActiveInfo info;
if (!m_context->getActiveUniform(objectOrZero(program), i, info))
return nullptr;
// Strip "[0]" from the name if it's an array.
if (info.name.endsWith("[0]"))
info.name = info.name.left(info.name.length() - 3);
// If it's an array, we need to iterate through each element, appending "[index]" to the name.
for (GC3Dint index = 0; index < info.size; ++index) {
String uniformName = makeString(info.name, '[', index, ']');
if (name == uniformName || name == info.name)
return WebGLUniformLocation::create(program, uniformLocation, info.type);
}
}
return nullptr;
}
WebGLAny WebGLRenderingContextBase::getVertexAttrib(GC3Duint index, GC3Denum pname)
{
if (isContextLostOrPending())
return nullptr;
if (index >= m_maxVertexAttribs) {
synthesizeGLError(GraphicsContext3D::INVALID_VALUE, "getVertexAttrib", "index out of range");
return nullptr;
}
const WebGLVertexArrayObjectBase::VertexAttribState& state = m_boundVertexArrayObject->getVertexAttribState(index);
if ((isWebGL2() || m_angleInstancedArrays) && pname == GraphicsContext3D::VERTEX_ATTRIB_ARRAY_DIVISOR_ANGLE)
return state.divisor;
switch (pname) {
case GraphicsContext3D::VERTEX_ATTRIB_ARRAY_BUFFER_BINDING:
if ((!isGLES2Compliant() && !index && m_boundVertexArrayObject->getVertexAttribState(0).bufferBinding == m_vertexAttrib0Buffer)
|| !state.bufferBinding
|| !state.bufferBinding->object())
return nullptr;
return state.bufferBinding;
case GraphicsContext3D::VERTEX_ATTRIB_ARRAY_ENABLED:
return state.enabled;
case GraphicsContext3D::VERTEX_ATTRIB_ARRAY_NORMALIZED:
return state.normalized;
case GraphicsContext3D::VERTEX_ATTRIB_ARRAY_SIZE:
return state.size;
case GraphicsContext3D::VERTEX_ATTRIB_ARRAY_STRIDE:
return state.originalStride;
case GraphicsContext3D::VERTEX_ATTRIB_ARRAY_TYPE:
return state.type;
case GraphicsContext3D::CURRENT_VERTEX_ATTRIB:
return Float32Array::tryCreate(m_vertexAttribValue[index].value, 4);
default:
synthesizeGLError(GraphicsContext3D::INVALID_ENUM, "getVertexAttrib", "invalid parameter name");
return nullptr;
}
}
long long WebGLRenderingContextBase::getVertexAttribOffset(GC3Duint index, GC3Denum pname)
{
if (isContextLostOrPending())
return 0;
return m_context->getVertexAttribOffset(index, pname);
}
bool WebGLRenderingContextBase::extensionIsEnabled(const String& name)
{
#define CHECK_EXTENSION(variable, nameLiteral) \
if (equalIgnoringASCIICase(name, nameLiteral)) \
return variable != nullptr;
CHECK_EXTENSION(m_extFragDepth, "EXT_frag_depth");
CHECK_EXTENSION(m_extBlendMinMax, "EXT_blend_minmax");
CHECK_EXTENSION(m_extsRGB, "EXT_sRGB");
CHECK_EXTENSION(m_extTextureFilterAnisotropic, "EXT_texture_filter_anisotropic");
CHECK_EXTENSION(m_extTextureFilterAnisotropic, "WEBKIT_EXT_texture_filter_anisotropic");
CHECK_EXTENSION(m_extShaderTextureLOD, "EXT_shader_texture_lod");
CHECK_EXTENSION(m_oesTextureFloat, "OES_texture_float");
CHECK_EXTENSION(m_oesTextureFloatLinear, "OES_texture_float_linear");
CHECK_EXTENSION(m_oesTextureHalfFloat, "OES_texture_half_float");
CHECK_EXTENSION(m_oesTextureHalfFloatLinear, "OES_texture_half_float_linear");
CHECK_EXTENSION(m_oesStandardDerivatives, "OES_standard_derivatives");
CHECK_EXTENSION(m_oesVertexArrayObject, "OES_vertex_array_object");
CHECK_EXTENSION(m_oesElementIndexUint, "OES_element_index_uint");
CHECK_EXTENSION(m_webglLoseContext, "WEBGL_lose_context");
CHECK_EXTENSION(m_webglDebugRendererInfo, "WEBGL_debug_renderer_info");
CHECK_EXTENSION(m_webglDebugShaders, "WEBGL_debug_shaders");
CHECK_EXTENSION(m_webglCompressedTextureATC, "WEBKIT_WEBGL_compressed_texture_atc");
CHECK_EXTENSION(m_webglCompressedTexturePVRTC, "WEBKIT_WEBGL_compressed_texture_pvrtc");
CHECK_EXTENSION(m_webglCompressedTextureS3TC, "WEBGL_compressed_texture_s3tc");
CHECK_EXTENSION(m_webglDepthTexture, "WEBGL_depth_texture");
CHECK_EXTENSION(m_webglDrawBuffers, "WEBGL_draw_buffers");
CHECK_EXTENSION(m_angleInstancedArrays, "ANGLE_instanced_arrays");
return false;
}
GC3Dboolean WebGLRenderingContextBase::isBuffer(WebGLBuffer* buffer)
{
if (!buffer || isContextLostOrPending())
return 0;
if (!buffer->hasEverBeenBound())
return 0;
return m_context->isBuffer(buffer->object());
}
bool WebGLRenderingContextBase::isContextLost() const
{
return m_contextLost;
}
bool WebGLRenderingContextBase::isContextLostOrPending()
{
if (m_isPendingPolicyResolution && !m_hasRequestedPolicyResolution) {
LOG(WebGL, "Context is being used. Attempt to resolve the policy.");
auto* canvas = htmlCanvas();
if (canvas) {
Document& document = canvas->document().topDocument();
Page* page = document.page();
if (page && !document.url().isLocalFile())
page->mainFrame().loader().client().resolveWebGLPolicyForURL(document.url());
// FIXME: We don't currently do anything with the result from resolution. A more
// complete implementation might try to construct a real context, etc and proceed
// with normal operation.
// https://bugs.webkit.org/show_bug.cgi?id=129122
}
m_hasRequestedPolicyResolution = true;
}
return m_contextLost || m_isPendingPolicyResolution;
}
GC3Dboolean WebGLRenderingContextBase::isEnabled(GC3Denum cap)
{
if (isContextLostOrPending() || !validateCapability("isEnabled", cap))
return 0;
if (cap == GraphicsContext3D::STENCIL_TEST)
return m_stencilEnabled;
return m_context->isEnabled(cap);
}
GC3Dboolean WebGLRenderingContextBase::isFramebuffer(WebGLFramebuffer* framebuffer)
{
if (!framebuffer || isContextLostOrPending())
return 0;
if (!framebuffer->hasEverBeenBound())
return 0;
return m_context->isFramebuffer(framebuffer->object());
}
GC3Dboolean WebGLRenderingContextBase::isProgram(WebGLProgram* program)
{
if (!program || isContextLostOrPending())
return 0;
return m_context->isProgram(program->object());
}
GC3Dboolean WebGLRenderingContextBase::isRenderbuffer(WebGLRenderbuffer* renderbuffer)
{
if (!renderbuffer || isContextLostOrPending())
return 0;
if (!renderbuffer->hasEverBeenBound())
return 0;
return m_context->isRenderbuffer(renderbuffer->object());
}
GC3Dboolean WebGLRenderingContextBase::isShader(WebGLShader* shader)
{
if (!shader || isContextLostOrPending())
return 0;
return m_context->isShader(shader->object());
}
GC3Dboolean WebGLRenderingContextBase::isTexture(WebGLTexture* texture)
{
if (!texture || isContextLostOrPending())
return 0;
if (!texture->hasEverBeenBound())
return 0;
return m_context->isTexture(texture->object());
}
void WebGLRenderingContextBase::lineWidth(GC3Dfloat width)
{
if (isContextLostOrPending())
return;
m_context->lineWidth(width);
}
void WebGLRenderingContextBase::linkProgram(WebGLProgram* program)
{
if (!linkProgramWithoutInvalidatingAttribLocations(program))
return;
program->increaseLinkCount();
}
bool WebGLRenderingContextBase::linkProgramWithoutInvalidatingAttribLocations(WebGLProgram* program)
{
if (isContextLostOrPending() || !validateWebGLObject("linkProgram", program))
return false;
RefPtr<WebGLShader> vertexShader = program->getAttachedShader(GraphicsContext3D::VERTEX_SHADER);
RefPtr<WebGLShader> fragmentShader = program->getAttachedShader(GraphicsContext3D::FRAGMENT_SHADER);
if (!vertexShader || !vertexShader->isValid() || !fragmentShader || !fragmentShader->isValid()) {
program->setLinkStatus(false);
return false;
}
#if !USE(ANGLE)
if (!m_context->precisionsMatch(objectOrZero(vertexShader.get()), objectOrZero(fragmentShader.get()))
|| !m_context->checkVaryingsPacking(objectOrZero(vertexShader.get()), objectOrZero(fragmentShader.get()))) {
program->setLinkStatus(false);
return false;
}
#endif
m_context->linkProgram(objectOrZero(program));
return true;
}
void WebGLRenderingContextBase::pixelStorei(GC3Denum pname, GC3Dint param)
{
if (isContextLostOrPending())
return;
switch (pname) {
case GraphicsContext3D::UNPACK_FLIP_Y_WEBGL:
m_unpackFlipY = param;
break;
case GraphicsContext3D::UNPACK_PREMULTIPLY_ALPHA_WEBGL:
m_unpackPremultiplyAlpha = param;
break;
case GraphicsContext3D::UNPACK_COLORSPACE_CONVERSION_WEBGL:
if (param == GraphicsContext3D::BROWSER_DEFAULT_WEBGL || param == GraphicsContext3D::NONE)
m_unpackColorspaceConversion = static_cast<GC3Denum>(param);
else {
synthesizeGLError(GraphicsContext3D::INVALID_VALUE, "pixelStorei", "invalid parameter for UNPACK_COLORSPACE_CONVERSION_WEBGL");
return;
}
break;
case GraphicsContext3D::PACK_ALIGNMENT:
case GraphicsContext3D::UNPACK_ALIGNMENT:
if (param == 1 || param == 2 || param == 4 || param == 8) {
if (pname == GraphicsContext3D::PACK_ALIGNMENT)
m_packAlignment = param;
else // GraphicsContext3D::UNPACK_ALIGNMENT:
m_unpackAlignment = param;
m_context->pixelStorei(pname, param);
} else {
synthesizeGLError(GraphicsContext3D::INVALID_VALUE, "pixelStorei", "invalid parameter for alignment");
return;
}
break;
default:
synthesizeGLError(GraphicsContext3D::INVALID_ENUM, "pixelStorei", "invalid parameter name");
return;
}
}
void WebGLRenderingContextBase::polygonOffset(GC3Dfloat factor, GC3Dfloat units)
{
if (isContextLostOrPending())
return;
m_context->polygonOffset(factor, units);
}
enum class InternalFormatTheme {
None,
NormalizedFixedPoint,
Packed,
SignedNormalizedFixedPoint,
FloatingPoint,
SignedInteger,
UnsignedInteger
};
static InternalFormatTheme internalFormatTheme(GC3Denum internalFormat)
{
switch (internalFormat) {
case GraphicsContext3D::RGB:
case GraphicsContext3D::RGBA:
case GraphicsContext3D::LUMINANCE_ALPHA:
case GraphicsContext3D::LUMINANCE:
case GraphicsContext3D::ALPHA:
case GraphicsContext3D::R8:
case GraphicsContext3D::RG8:
case GraphicsContext3D::RGB8:
case GraphicsContext3D::SRGB8:
case GraphicsContext3D::RGBA8:
case GraphicsContext3D::SRGB8_ALPHA8:
case GraphicsContext3D::SRGB_ALPHA:
return InternalFormatTheme::NormalizedFixedPoint;
case GraphicsContext3D::RGB565:
case GraphicsContext3D::RGB5_A1:
case GraphicsContext3D::RGBA4:
case GraphicsContext3D::RGB9_E5:
case GraphicsContext3D::RGB10_A2:
case GraphicsContext3D::R11F_G11F_B10F:
case GraphicsContext3D::RGB10_A2UI:
return InternalFormatTheme::Packed;
case GraphicsContext3D::R8_SNORM:
case GraphicsContext3D::RG8_SNORM:
case GraphicsContext3D::RGB8_SNORM:
case GraphicsContext3D::RGBA8_SNORM:
return InternalFormatTheme::SignedNormalizedFixedPoint;
case GraphicsContext3D::R16F:
case GraphicsContext3D::R32F:
case GraphicsContext3D::RG16F:
case GraphicsContext3D::RG32F:
case GraphicsContext3D::RGB16F:
case GraphicsContext3D::RGB32F:
case GraphicsContext3D::RGBA16F:
case GraphicsContext3D::RGBA32F:
return InternalFormatTheme::FloatingPoint;
case GraphicsContext3D::R8I:
case GraphicsContext3D::R16I:
case GraphicsContext3D::R32I:
case GraphicsContext3D::RG8I:
case GraphicsContext3D::RG16I:
case GraphicsContext3D::RG32I:
case GraphicsContext3D::RGB8I:
case GraphicsContext3D::RGB16I:
case GraphicsContext3D::RGB32I:
case GraphicsContext3D::RGBA8I:
case GraphicsContext3D::RGBA16I:
case GraphicsContext3D::RGBA32I:
return InternalFormatTheme::SignedInteger;
case GraphicsContext3D::R8UI:
case GraphicsContext3D::R16UI:
case GraphicsContext3D::R32UI:
case GraphicsContext3D::RG8UI:
case GraphicsContext3D::RG16UI:
case GraphicsContext3D::RG32UI:
case GraphicsContext3D::RGB8UI:
case GraphicsContext3D::RGB16UI:
case GraphicsContext3D::RGB32UI:
case GraphicsContext3D::RGBA8UI:
case GraphicsContext3D::RGBA16UI:
case GraphicsContext3D::RGBA32UI:
return InternalFormatTheme::UnsignedInteger;
default:
return InternalFormatTheme::None;
}
}
static int numberOfComponentsForFormat(GC3Denum format)
{
switch (format) {
case GraphicsContext3D::RED:
case GraphicsContext3D::RED_INTEGER:
return 1;
case GraphicsContext3D::RG:
case GraphicsContext3D::RG_INTEGER:
return 2;
case GraphicsContext3D::RGB:
case GraphicsContext3D::RGB_INTEGER:
return 3;
case GraphicsContext3D::RGBA:
case GraphicsContext3D::RGBA_INTEGER:
return 4;
default:
return 0;
}
}
static int numberOfComponentsForInternalFormat(GC3Denum internalFormat)
{
switch (internalFormat) {
case GraphicsContext3D::LUMINANCE:
case GraphicsContext3D::ALPHA:
case GraphicsContext3D::R8:
case GraphicsContext3D::R8_SNORM:
case GraphicsContext3D::R16F:
case GraphicsContext3D::R32F:
case GraphicsContext3D::R8UI:
case GraphicsContext3D::R8I:
case GraphicsContext3D::R16UI:
case GraphicsContext3D::R16I:
case GraphicsContext3D::R32UI:
case GraphicsContext3D::R32I:
case GraphicsContext3D::DEPTH_COMPONENT16:
case GraphicsContext3D::DEPTH_COMPONENT24:
case GraphicsContext3D::DEPTH_COMPONENT32F:
return 1;
case GraphicsContext3D::RG8:
case GraphicsContext3D::LUMINANCE_ALPHA:
case GraphicsContext3D::RG8_SNORM:
case GraphicsContext3D::RG16F:
case GraphicsContext3D::RG32F:
case GraphicsContext3D::RG8UI:
case GraphicsContext3D::RG8I:
case GraphicsContext3D::RG16UI:
case GraphicsContext3D::RG16I:
case GraphicsContext3D::RG32UI:
case GraphicsContext3D::RG32I:
case GraphicsContext3D::DEPTH24_STENCIL8:
case GraphicsContext3D::DEPTH32F_STENCIL8:
return 2;
case GraphicsContext3D::RGB:
case GraphicsContext3D::RGB8:
case GraphicsContext3D::SRGB8:
case GraphicsContext3D::RGB565:
case GraphicsContext3D::RGB8_SNORM:
case GraphicsContext3D::R11F_G11F_B10F:
case GraphicsContext3D::RGB9_E5:
case GraphicsContext3D::RGB16F:
case GraphicsContext3D::RGB32F:
case GraphicsContext3D::RGB8UI:
case GraphicsContext3D::RGB8I:
case GraphicsContext3D::RGB16UI:
case GraphicsContext3D::RGB16I:
case GraphicsContext3D::RGB32UI:
case GraphicsContext3D::RGB32I:
return 3;
case GraphicsContext3D::RGBA:
case GraphicsContext3D::RGBA8:
case GraphicsContext3D::SRGB_ALPHA:
case GraphicsContext3D::SRGB8_ALPHA8:
case GraphicsContext3D::RGBA8_SNORM:
case GraphicsContext3D::RGB5_A1:
case GraphicsContext3D::RGBA4:
case GraphicsContext3D::RGB10_A2:
case GraphicsContext3D::RGBA16F:
case GraphicsContext3D::RGBA32F:
case GraphicsContext3D::RGBA8UI:
case GraphicsContext3D::RGBA8I:
case GraphicsContext3D::RGB10_A2UI:
case GraphicsContext3D::RGBA16UI:
case GraphicsContext3D::RGBA16I:
case GraphicsContext3D::RGBA32UI:
case GraphicsContext3D::RGBA32I:
return 4;
default:
return 0;
}
}
void WebGLRenderingContextBase::readPixels(GC3Dint x, GC3Dint y, GC3Dsizei width, GC3Dsizei height, GC3Denum format, GC3Denum type, ArrayBufferView& pixels)
{
if (isContextLostOrPending())
return;
// Due to WebGL's same-origin restrictions, it is not possible to
// taint the origin using the WebGL API.
ASSERT(canvasBase().originClean());
GC3Denum internalFormat = 0;
if (m_framebufferBinding) {
const char* reason = "framebuffer incomplete";
if (!m_framebufferBinding->onAccess(graphicsContext3D(), &reason)) {
synthesizeGLError(GraphicsContext3D::INVALID_FRAMEBUFFER_OPERATION, "readPixels", reason);
return;
}
// FIXME: readBuffer() should affect this
internalFormat = m_framebufferBinding->getColorBufferFormat();
} else {
if (m_attributes.alpha)
internalFormat = GraphicsContext3D::RGBA8;
else
internalFormat = GraphicsContext3D::RGB8;
}
if (!internalFormat) {
synthesizeGLError(GraphicsContext3D::INVALID_ENUM, "readPixels", "Incorrect internal format");
return;
}
if (isWebGL1()) {
switch (format) {
case GraphicsContext3D::ALPHA:
case GraphicsContext3D::RGB:
case GraphicsContext3D::RGBA:
break;
default:
synthesizeGLError(GraphicsContext3D::INVALID_ENUM, "readPixels", "invalid format");
return;
}
switch (type) {
case GraphicsContext3D::UNSIGNED_BYTE:
case GraphicsContext3D::UNSIGNED_SHORT_5_6_5:
case GraphicsContext3D::UNSIGNED_SHORT_4_4_4_4:
case GraphicsContext3D::UNSIGNED_SHORT_5_5_5_1:
break;
case GraphicsContext3D::FLOAT:
if (!m_oesTextureFloat && !m_oesTextureHalfFloat) {
synthesizeGLError(GraphicsContext3D::INVALID_ENUM, "readPixels", "invalid type");
return;
}
break;
default:
synthesizeGLError(GraphicsContext3D::INVALID_ENUM, "readPixels", "invalid type");
return;
}
if (format != GraphicsContext3D::RGBA || (type != GraphicsContext3D::UNSIGNED_BYTE && type != GraphicsContext3D::FLOAT)) {
synthesizeGLError(GraphicsContext3D::INVALID_OPERATION, "readPixels", "format not RGBA or type not UNSIGNED_BYTE|FLOAT");
return;
}
}
InternalFormatTheme internalFormatTheme = WebCore::internalFormatTheme(internalFormat);
int internalFormatComponentCount = numberOfComponentsForInternalFormat(internalFormat);
if (internalFormatTheme == InternalFormatTheme::None || !internalFormatComponentCount) {
synthesizeGLError(GraphicsContext3D::INVALID_ENUM, "readPixels", "Incorrect internal format");
return;
}
#define CHECK_COMPONENT_COUNT \
if (numberOfComponentsForFormat(format) < internalFormatComponentCount) { \
synthesizeGLError(GraphicsContext3D::INVALID_ENUM, "readPixels", "Not enough components in format"); \
return; \
}
#define INTERNAL_FORMAT_CHECK(typeMacro, pixelTypeMacro) \
if (type != GraphicsContext3D::typeMacro || pixels.getType() != JSC::pixelTypeMacro) { \
synthesizeGLError(GraphicsContext3D::INVALID_ENUM, "readPixels", "type does not match internal format"); \
return; \
} \
if (format != GraphicsContext3D::RED && format != GraphicsContext3D::RG && format != GraphicsContext3D::RGB && format != GraphicsContext3D::RGBA) { \
synthesizeGLError(GraphicsContext3D::INVALID_ENUM, "readPixels", "Unknown format"); \
return; \
} \
CHECK_COMPONENT_COUNT
#define INTERNAL_FORMAT_INTEGER_CHECK(typeMacro, pixelTypeMacro) \
if (type != GraphicsContext3D::typeMacro || pixels.getType() != JSC::pixelTypeMacro) { \
synthesizeGLError(GraphicsContext3D::INVALID_ENUM, "readPixels", "type does not match internal format"); \
return; \
} \
if (format != GraphicsContext3D::RED_INTEGER && format != GraphicsContext3D::RG_INTEGER && format != GraphicsContext3D::RGB_INTEGER && format != GraphicsContext3D::RGBA_INTEGER) { \
synthesizeGLError(GraphicsContext3D::INVALID_ENUM, "readPixels", "Unknown format"); \
return; \
} \
CHECK_COMPONENT_COUNT
#define CASE_PACKED_INTERNAL_FORMAT_CHECK(internalFormatMacro, formatMacro, type0Macro, pixelType0Macro, type1Macro, pixelType1Macro) case GraphicsContext3D::internalFormatMacro: \
if (!(type == GraphicsContext3D::type0Macro && pixels.getType() == JSC::pixelType0Macro) \
&& !(type == GraphicsContext3D::type1Macro && pixels.getType() == JSC::pixelType1Macro)) { \
synthesizeGLError(GraphicsContext3D::INVALID_ENUM, "readPixels", "type does not match internal format"); \
return; \
} \
if (format != GraphicsContext3D::formatMacro) { \
synthesizeGLError(GraphicsContext3D::INVALID_ENUM, "readPixels", "Invalid format"); \
return; \
} \
break;
switch (internalFormatTheme) {
case InternalFormatTheme::NormalizedFixedPoint:
if (type == GraphicsContext3D::FLOAT) {
INTERNAL_FORMAT_CHECK(FLOAT, TypeFloat32);
} else {
INTERNAL_FORMAT_CHECK(UNSIGNED_BYTE, TypeUint8);
}
break;
case InternalFormatTheme::SignedNormalizedFixedPoint:
INTERNAL_FORMAT_CHECK(BYTE, TypeInt8);
break;
case InternalFormatTheme::FloatingPoint:
INTERNAL_FORMAT_CHECK(FLOAT, TypeFloat32);
break;
case InternalFormatTheme::SignedInteger:
INTERNAL_FORMAT_INTEGER_CHECK(INT, TypeInt32);
break;
case InternalFormatTheme::UnsignedInteger:
INTERNAL_FORMAT_INTEGER_CHECK(UNSIGNED_INT, TypeUint32);
break;
case InternalFormatTheme::Packed:
switch (internalFormat) {
CASE_PACKED_INTERNAL_FORMAT_CHECK(RGB565 , RGB , UNSIGNED_SHORT_5_6_5 , TypeUint16, UNSIGNED_BYTE , TypeUint8 );
CASE_PACKED_INTERNAL_FORMAT_CHECK(RGB5_A1 , RGBA , UNSIGNED_SHORT_5_5_5_1 , TypeUint16, UNSIGNED_BYTE , TypeUint8 );
CASE_PACKED_INTERNAL_FORMAT_CHECK(RGBA4 , RGBA , UNSIGNED_SHORT_4_4_4_4 , TypeUint16, UNSIGNED_BYTE , TypeUint8 );
CASE_PACKED_INTERNAL_FORMAT_CHECK(RGB9_E5 , RGB , UNSIGNED_INT_5_9_9_9_REV , TypeUint32, UNSIGNED_INT_5_9_9_9_REV , TypeUint32 );
CASE_PACKED_INTERNAL_FORMAT_CHECK(RGB10_A2 , RGBA , UNSIGNED_INT_2_10_10_10_REV , TypeUint32, UNSIGNED_INT_2_10_10_10_REV, TypeUint32 );
CASE_PACKED_INTERNAL_FORMAT_CHECK(R11F_G11F_B10F, RGB , UNSIGNED_INT_10F_11F_11F_REV, TypeUint32, FLOAT , TypeFloat32);
CASE_PACKED_INTERNAL_FORMAT_CHECK(RGB10_A2UI , RGBA_INTEGER, UNSIGNED_INT_2_10_10_10_REV , TypeUint32, UNSIGNED_INT_2_10_10_10_REV, TypeUint32 );
}
break;
case InternalFormatTheme::None:
ASSERT_NOT_REACHED();
}
#undef CHECK_COMPONENT_COUNT
#undef INTERNAL_FORMAT_CHECK
#undef INTERNAL_FORMAT_INTEGER_CHECK
#undef CASE_PACKED_INTERNAL_FORMAT_CHECK
// Calculate array size, taking into consideration of PACK_ALIGNMENT.
unsigned totalBytesRequired = 0;
unsigned padding = 0;
if (!m_isRobustnessEXTSupported) {
GC3Denum error = m_context->computeImageSizeInBytes(format, type, width, height, m_packAlignment, &totalBytesRequired, &padding);
if (error != GraphicsContext3D::NO_ERROR) {
synthesizeGLError(error, "readPixels", "invalid dimensions");
return;
}
if (pixels.byteLength() < totalBytesRequired) {
synthesizeGLError(GraphicsContext3D::INVALID_OPERATION, "readPixels", "ArrayBufferView not large enough for dimensions");
return;
}
}
clearIfComposited();
void* data = pixels.baseAddress();
if (m_isRobustnessEXTSupported)
m_context->getExtensions().readnPixelsEXT(x, y, width, height, format, type, pixels.byteLength(), data);
else
m_context->readPixels(x, y, width, height, format, type, data);
}
void WebGLRenderingContextBase::releaseShaderCompiler()
{
if (isContextLostOrPending())
return;
m_context->releaseShaderCompiler();
}
void WebGLRenderingContextBase::sampleCoverage(GC3Dfloat value, GC3Dboolean invert)
{
if (isContextLostOrPending())
return;
m_context->sampleCoverage(value, invert);
}
void WebGLRenderingContextBase::scissor(GC3Dint x, GC3Dint y, GC3Dsizei width, GC3Dsizei height)
{
if (isContextLostOrPending())
return;
if (!validateSize("scissor", width, height))
return;
m_context->scissor(x, y, width, height);
}
void WebGLRenderingContextBase::shaderSource(WebGLShader* shader, const String& string)
{
if (isContextLostOrPending() || !validateWebGLObject("shaderSource", shader))
return;
String stringWithoutComments = StripComments(string).result();
if (!validateString("shaderSource", stringWithoutComments))
return;
shader->setSource(string);
m_context->shaderSource(objectOrZero(shader), stringWithoutComments);
}
void WebGLRenderingContextBase::stencilFunc(GC3Denum func, GC3Dint ref, GC3Duint mask)
{
if (isContextLostOrPending())
return;
if (!validateStencilFunc("stencilFunc", func))
return;
m_stencilFuncRef = ref;
m_stencilFuncRefBack = ref;
m_stencilFuncMask = mask;
m_stencilFuncMaskBack = mask;
m_context->stencilFunc(func, ref, mask);
}
void WebGLRenderingContextBase::stencilFuncSeparate(GC3Denum face, GC3Denum func, GC3Dint ref, GC3Duint mask)
{
if (isContextLostOrPending())
return;
if (!validateStencilFunc("stencilFuncSeparate", func))
return;
switch (face) {
case GraphicsContext3D::FRONT_AND_BACK:
m_stencilFuncRef = ref;
m_stencilFuncRefBack = ref;
m_stencilFuncMask = mask;
m_stencilFuncMaskBack = mask;
break;
case GraphicsContext3D::FRONT:
m_stencilFuncRef = ref;
m_stencilFuncMask = mask;
break;
case GraphicsContext3D::BACK:
m_stencilFuncRefBack = ref;
m_stencilFuncMaskBack = mask;
break;
default:
synthesizeGLError(GraphicsContext3D::INVALID_ENUM, "stencilFuncSeparate", "invalid face");
return;
}
m_context->stencilFuncSeparate(face, func, ref, mask);
}
void WebGLRenderingContextBase::stencilMask(GC3Duint mask)
{
if (isContextLostOrPending())
return;
m_stencilMask = mask;
m_stencilMaskBack = mask;
m_context->stencilMask(mask);
}
void WebGLRenderingContextBase::stencilMaskSeparate(GC3Denum face, GC3Duint mask)
{
if (isContextLostOrPending())
return;
switch (face) {
case GraphicsContext3D::FRONT_AND_BACK:
m_stencilMask = mask;
m_stencilMaskBack = mask;
break;
case GraphicsContext3D::FRONT:
m_stencilMask = mask;
break;
case GraphicsContext3D::BACK:
m_stencilMaskBack = mask;
break;
default:
synthesizeGLError(GraphicsContext3D::INVALID_ENUM, "stencilMaskSeparate", "invalid face");
return;
}
m_context->stencilMaskSeparate(face, mask);
}
void WebGLRenderingContextBase::stencilOp(GC3Denum fail, GC3Denum zfail, GC3Denum zpass)
{
if (isContextLostOrPending())
return;
m_context->stencilOp(fail, zfail, zpass);
}
void WebGLRenderingContextBase::stencilOpSeparate(GC3Denum face, GC3Denum fail, GC3Denum zfail, GC3Denum zpass)
{
if (isContextLostOrPending())
return;
m_context->stencilOpSeparate(face, fail, zfail, zpass);
}
void WebGLRenderingContextBase::texImage2DBase(GC3Denum target, GC3Dint level, GC3Denum internalFormat, GC3Dsizei width, GC3Dsizei height, GC3Dint border, GC3Denum format, GC3Denum type, const void* pixels)
{
// FIXME: For now we ignore any errors returned.
auto tex = validateTextureBinding("texImage2D", target, true);
ASSERT(validateTexFuncParameters("texImage2D", TexImage, target, level, internalFormat, width, height, border, format, type));
ASSERT(tex);
ASSERT(validateNPOTTextureLevel(width, height, level, "texImage2D"));
if (!pixels) {
if (!m_context->texImage2DResourceSafe(target, level, internalFormat, width, height, border, format, type, m_unpackAlignment))
return;
} else {
ASSERT(validateSettableTexInternalFormat("texImage2D", internalFormat));
m_context->moveErrorsToSyntheticErrorList();
m_context->texImage2D(target, level, internalFormat, width, height,
border, format, type, pixels);
if (m_context->moveErrorsToSyntheticErrorList()) {
// The texImage2D function failed. Tell the WebGLTexture it doesn't have the data for this level.
tex->markInvalid(target, level);
return;
}
}
tex->setLevelInfo(target, level, internalFormat, width, height, type);
}
void WebGLRenderingContextBase::texImage2DImpl(GC3Denum target, GC3Dint level, GC3Denum internalformat, GC3Denum format, GC3Denum type, Image* image, GraphicsContext3D::ImageHtmlDomSource domSource, bool flipY, bool premultiplyAlpha)
{
Vector<uint8_t> data;
GraphicsContext3D::ImageExtractor imageExtractor(image, domSource, premultiplyAlpha, m_unpackColorspaceConversion == GraphicsContext3D::NONE);
if (!imageExtractor.extractSucceeded()) {
synthesizeGLError(GraphicsContext3D::INVALID_VALUE, "texImage2D", "bad image data");
return;
}
GraphicsContext3D::DataFormat sourceDataFormat = imageExtractor.imageSourceFormat();
GraphicsContext3D::AlphaOp alphaOp = imageExtractor.imageAlphaOp();
const void* imagePixelData = imageExtractor.imagePixelData();
bool needConversion = true;
if (type == GraphicsContext3D::UNSIGNED_BYTE && sourceDataFormat == GraphicsContext3D::DataFormatRGBA8 && format == GraphicsContext3D::RGBA && alphaOp == GraphicsContext3D::AlphaDoNothing && !flipY)
needConversion = false;
else {
if (!m_context->packImageData(image, imagePixelData, format, type, flipY, alphaOp, sourceDataFormat, imageExtractor.imageWidth(), imageExtractor.imageHeight(), imageExtractor.imageSourceUnpackAlignment(), data)) {
synthesizeGLError(GraphicsContext3D::INVALID_VALUE, "texImage2D", "packImage error");
return;
}
}
if (m_unpackAlignment != 1)
m_context->pixelStorei(GraphicsContext3D::UNPACK_ALIGNMENT, 1);
texImage2DBase(target, level, internalformat, image->width(), image->height(), 0, format, type, needConversion ? data.data() : imagePixelData);
if (m_unpackAlignment != 1)
m_context->pixelStorei(GraphicsContext3D::UNPACK_ALIGNMENT, m_unpackAlignment);
}
bool WebGLRenderingContextBase::validateTexFunc(const char* functionName, TexFuncValidationFunctionType functionType, TexFuncValidationSourceType sourceType, GC3Denum target, GC3Dint level, GC3Denum internalFormat, GC3Dsizei width, GC3Dsizei height, GC3Dint border, GC3Denum format, GC3Denum type, GC3Dint xoffset, GC3Dint yoffset)
{
if (!validateTexFuncParameters(functionName, functionType, target, level, internalFormat, width, height, border, format, type))
return false;
auto texture = validateTextureBinding(functionName, target, true);
if (!texture)
return false;
if (functionType != TexSubImage) {
if (functionType == TexImage && texture->immutable()) {
synthesizeGLError(GraphicsContext3D::INVALID_OPERATION, functionName, "texStorage() called on this texture previously");
return false;
}
if (!validateNPOTTextureLevel(width, height, level, functionName))
return false;
// For SourceArrayBufferView, function validateTexFuncData() would handle whether to validate the SettableTexFormat
// by checking if the ArrayBufferView is null or not.
if (sourceType != SourceArrayBufferView) {
if (!validateSettableTexInternalFormat(functionName, internalFormat))
return false;
}
} else {
if (!validateSettableTexInternalFormat(functionName, internalFormat))
return false;
if (!validateSize(functionName, xoffset, yoffset))
return false;
// Before checking if it is in the range, check if overflow happens first.
if (xoffset + width < 0 || yoffset + height < 0) {
synthesizeGLError(GraphicsContext3D::INVALID_VALUE, functionName, "bad dimensions");
return false;
}
if (xoffset + width > texture->getWidth(target, level) || yoffset + height > texture->getHeight(target, level)) {
synthesizeGLError(GraphicsContext3D::INVALID_VALUE, functionName, "dimensions out of range");
return false;
}
if (texture->getInternalFormat(target, level) != internalFormat || (isWebGL1() && texture->getType(target, level) != type)) {
synthesizeGLError(GraphicsContext3D::INVALID_OPERATION, functionName, "type and format do not match texture");
return false;
}
}
return true;
}
void WebGLRenderingContextBase::texImage2D(GC3Denum target, GC3Dint level, GC3Denum internalFormat, GC3Dsizei width, GC3Dsizei height, GC3Dint border, GC3Denum format, GC3Denum type, RefPtr<ArrayBufferView>&& pixels)
{
if (isContextLostOrPending() || !validateTexFuncData("texImage2D", level, width, height, internalFormat, format, type, pixels.get(), NullAllowed)
|| !validateTexFunc("texImage2D", TexImage, SourceArrayBufferView, target, level, internalFormat, width, height, border, format, type, 0, 0))
return;
void* data = pixels ? pixels->baseAddress() : 0;
Vector<uint8_t> tempData;
bool changeUnpackAlignment = false;
if (data && (m_unpackFlipY || m_unpackPremultiplyAlpha)) {
if (!m_context->extractTextureData(width, height, format, type,
m_unpackAlignment,
m_unpackFlipY, m_unpackPremultiplyAlpha,
data,
tempData))
return;
data = tempData.data();
changeUnpackAlignment = true;
}
if (changeUnpackAlignment)
m_context->pixelStorei(GraphicsContext3D::UNPACK_ALIGNMENT, 1);
texImage2DBase(target, level, internalFormat, width, height, border, format, type, data);
if (changeUnpackAlignment)
m_context->pixelStorei(GraphicsContext3D::UNPACK_ALIGNMENT, m_unpackAlignment);
}
void WebGLRenderingContextBase::texSubImage2DImpl(GC3Denum target, GC3Dint level, GC3Dint xoffset, GC3Dint yoffset, GC3Denum format, GC3Denum type, Image* image, GraphicsContext3D::ImageHtmlDomSource domSource, bool flipY, bool premultiplyAlpha)
{
Vector<uint8_t> data;
GraphicsContext3D::ImageExtractor imageExtractor(image, domSource, premultiplyAlpha, m_unpackColorspaceConversion == GraphicsContext3D::NONE);
if (!imageExtractor.extractSucceeded()) {
synthesizeGLError(GraphicsContext3D::INVALID_VALUE, "texSubImage2D", "bad image");
return;
}
GraphicsContext3D::DataFormat sourceDataFormat = imageExtractor.imageSourceFormat();
GraphicsContext3D::AlphaOp alphaOp = imageExtractor.imageAlphaOp();
const void* imagePixelData = imageExtractor.imagePixelData();
bool needConversion = true;
if (type == GraphicsContext3D::UNSIGNED_BYTE && sourceDataFormat == GraphicsContext3D::DataFormatRGBA8 && format == GraphicsContext3D::RGBA && alphaOp == GraphicsContext3D::AlphaDoNothing && !flipY)
needConversion = false;
else {
if (!m_context->packImageData(image, imagePixelData, format, type, flipY, alphaOp, sourceDataFormat, imageExtractor.imageWidth(), imageExtractor.imageHeight(), imageExtractor.imageSourceUnpackAlignment(), data)) {
synthesizeGLError(GraphicsContext3D::INVALID_VALUE, "texImage2D", "bad image data");
return;
}
}
if (m_unpackAlignment != 1)
m_context->pixelStorei(GraphicsContext3D::UNPACK_ALIGNMENT, 1);
texSubImage2DBase(target, level, xoffset, yoffset, image->width(), image->height(), format, format, type, needConversion ? data.data() : imagePixelData);
if (m_unpackAlignment != 1)
m_context->pixelStorei(GraphicsContext3D::UNPACK_ALIGNMENT, m_unpackAlignment);
}
void WebGLRenderingContextBase::texSubImage2D(GC3Denum target, GC3Dint level, GC3Dint xoffset, GC3Dint yoffset, GC3Dsizei width, GC3Dsizei height, GC3Denum format, GC3Denum type, RefPtr<ArrayBufferView>&& pixels)
{
if (isContextLostOrPending())
return;
auto texture = validateTextureBinding("texSubImage2D", target, true);
if (!texture)
return;
GC3Denum internalFormat = texture->getInternalFormat(target, level);
if (!internalFormat) {
synthesizeGLError(GraphicsContext3D::INVALID_VALUE, "texSubImage2D", "invalid texture target or level");
return;
}
if (!validateTexFuncData("texSubImage2D", level, width, height, internalFormat, format, type, pixels.get(), NullNotAllowed))
return;
if (!validateTexFunc("texSubImage2D", TexSubImage, SourceArrayBufferView, target, level, internalFormat, width, height, 0, format, type, xoffset, yoffset))
return;
void* data = pixels->baseAddress();
Vector<uint8_t> tempData;
bool changeUnpackAlignment = false;
if (data && (m_unpackFlipY || m_unpackPremultiplyAlpha)) {
if (!m_context->extractTextureData(width, height, format, type, m_unpackAlignment, m_unpackFlipY, m_unpackPremultiplyAlpha, data, tempData))
return;
data = tempData.data();
changeUnpackAlignment = true;
}
if (changeUnpackAlignment)
m_context->pixelStorei(GraphicsContext3D::UNPACK_ALIGNMENT, 1);
texSubImage2DBase(target, level, xoffset, yoffset, width, height, internalFormat, format, type, data);
if (changeUnpackAlignment)
m_context->pixelStorei(GraphicsContext3D::UNPACK_ALIGNMENT, m_unpackAlignment);
}
ExceptionOr<void> WebGLRenderingContextBase::texSubImage2D(GC3Denum target, GC3Dint level, GC3Dint xoffset, GC3Dint yoffset, GC3Denum format, GC3Denum type, Optional<TexImageSource>&& source)
{
if (!source) {
synthesizeGLError(GraphicsContext3D::INVALID_VALUE, "texSubImage2D", "source is null");
return { };
}
if (isContextLostOrPending())
return { };
auto visitor = WTF::makeVisitor([&](const RefPtr<ImageBitmap>& bitmap) -> ExceptionOr<void> {
auto texture = validateTextureBinding("texSubImage2D", target, true);
if (!texture)
return { };
GC3Denum internalFormat = texture->getInternalFormat(target, level);
if (!internalFormat) {
synthesizeGLError(GraphicsContext3D::INVALID_VALUE, "texSubImage2D", "invalid texture target or level");
return { };
}
if (!validateTexFunc("texSubImage2D", TexSubImage, SourceImageBitmap, target, level, internalFormat, bitmap->width(), bitmap->height(), 0, format, type, xoffset, yoffset))
return { };
ImageBuffer* buffer = bitmap->buffer();
if (!buffer)
return { };
RefPtr<Image> image = buffer->copyImage(ImageBuffer::fastCopyImageMode());
if (image)
texSubImage2DImpl(target, level, xoffset, yoffset, format, type, image.get(), GraphicsContext3D::HtmlDomImage, m_unpackFlipY, m_unpackPremultiplyAlpha);
return { };
}, [&](const RefPtr<ImageData>& pixels) -> ExceptionOr<void> {
auto texture = validateTextureBinding("texSubImage2D", target, true);
if (!texture)
return { };
GC3Denum internalFormat = texture->getInternalFormat(target, level);
if (!internalFormat) {
synthesizeGLError(GraphicsContext3D::INVALID_VALUE, "texSubImage2D", "invalid texture target or level");
return { };
}
if (!validateTexFunc("texSubImage2D", TexSubImage, SourceImageData, target, level, internalFormat, pixels->width(), pixels->height(), 0, format, type, xoffset, yoffset))
return { };
Vector<uint8_t> data;
bool needConversion = true;
// The data from ImageData is always of format RGBA8.
// No conversion is needed if destination format is RGBA and type is USIGNED_BYTE and no Flip or Premultiply operation is required.
if (format == GraphicsContext3D::RGBA && type == GraphicsContext3D::UNSIGNED_BYTE && !m_unpackFlipY && !m_unpackPremultiplyAlpha)
needConversion = false;
else {
if (!m_context->extractImageData(pixels.get(), format, type, m_unpackFlipY, m_unpackPremultiplyAlpha, data)) {
synthesizeGLError(GraphicsContext3D::INVALID_VALUE, "texSubImage2D", "bad image data");
return { };
}
}
if (m_unpackAlignment != 1)
m_context->pixelStorei(GraphicsContext3D::UNPACK_ALIGNMENT, 1);
texSubImage2DBase(target, level, xoffset, yoffset, pixels->width(), pixels->height(), format, format, type, needConversion ? data.data() : pixels->data()->data());
if (m_unpackAlignment != 1)
m_context->pixelStorei(GraphicsContext3D::UNPACK_ALIGNMENT, m_unpackAlignment);
return { };
} , [&](const RefPtr<HTMLImageElement>& image) -> ExceptionOr<void> {
if (isContextLostOrPending())
return { };
auto validationResult = validateHTMLImageElement("texSubImage2D", image.get());
if (validationResult.hasException())
return validationResult.releaseException();
if (!validationResult.returnValue())
return { };
RefPtr<Image> imageForRender = image->cachedImage()->imageForRenderer(image->renderer());
if (!imageForRender)
return { };
if (imageForRender->isSVGImage())
imageForRender = drawImageIntoBuffer(*imageForRender, image->width(), image->height(), 1);
auto texture = validateTextureBinding("texSubImage2D", target, true);
if (!texture)
return { };
GC3Denum internalFormat = texture->getInternalFormat(target, level);
if (!internalFormat) {
synthesizeGLError(GraphicsContext3D::INVALID_VALUE, "texSubImage2D", "invalid texture target or level");
return { };
}
if (!imageForRender || !validateTexFunc("texSubImage2D", TexSubImage, SourceHTMLImageElement, target, level, internalFormat, imageForRender->width(), imageForRender->height(), 0, format, type, xoffset, yoffset))
return { };
texSubImage2DImpl(target, level, xoffset, yoffset, format, type, imageForRender.get(), GraphicsContext3D::HtmlDomImage, m_unpackFlipY, m_unpackPremultiplyAlpha);
return { };
}, [&](const RefPtr<HTMLCanvasElement>& canvas) -> ExceptionOr<void> {
if (isContextLostOrPending())
return { };
auto validationResult = validateHTMLCanvasElement("texSubImage2D", canvas.get());
if (validationResult.hasException())
return validationResult.releaseException();
if (!validationResult.returnValue())
return { };
auto texture = validateTextureBinding("texSubImage2D", target, true);
if (!texture)
return { };
GC3Denum internalFormat = texture->getInternalFormat(target, level);
if (!internalFormat) {
synthesizeGLError(GraphicsContext3D::INVALID_VALUE, "texSubImage2D", "invalid texture target or level");
return { };
}
if (!validateTexFunc("texSubImage2D", TexSubImage, SourceHTMLCanvasElement, target, level, internalFormat, canvas->width(), canvas->height(), 0, format, type, xoffset, yoffset))
return { };
RefPtr<ImageData> imageData = canvas->getImageData();
if (imageData)
texSubImage2D(target, level, xoffset, yoffset, format, type, TexImageSource(imageData.get()));
else
texSubImage2DImpl(target, level, xoffset, yoffset, format, type, canvas->copiedImage(), GraphicsContext3D::HtmlDomCanvas, m_unpackFlipY, m_unpackPremultiplyAlpha);
return { };
}
#if ENABLE(VIDEO)
, [&](const RefPtr<HTMLVideoElement>& video) -> ExceptionOr<void> {
if (isContextLostOrPending())
return { };
auto validationResult = validateHTMLVideoElement("texSubImage2D", video.get());
if (validationResult.hasException())
return validationResult.releaseException();
if (!validationResult.returnValue())
return { };
auto texture = validateTextureBinding("texSubImage2D", target, true);
if (!texture)
return { };
GC3Denum internalFormat = texture->getInternalFormat(target, level);
if (!internalFormat) {
synthesizeGLError(GraphicsContext3D::INVALID_VALUE, "texSubImage2D", "invalid texture target or level");
return { };
}
if (!validateTexFunc("texSubImage2D", TexSubImage, SourceHTMLVideoElement, target, level, internalFormat, video->videoWidth(), video->videoHeight(), 0, format, type, xoffset, yoffset))
return { };
RefPtr<Image> image = videoFrameToImage(video.get(), ImageBuffer::fastCopyImageMode());
if (!image)
return { };
texSubImage2DImpl(target, level, xoffset, yoffset, format, type, image.get(), GraphicsContext3D::HtmlDomVideo, m_unpackFlipY, m_unpackPremultiplyAlpha);
return { };
}
#endif
);
return WTF::visit(visitor, source.value());
}
bool WebGLRenderingContextBase::validateArrayBufferType(const char* functionName, GC3Denum type, Optional<JSC::TypedArrayType> arrayType)
{
#define TYPE_VALIDATION_CASE(arrayTypeMacro) if (arrayType && arrayType.value() != JSC::arrayTypeMacro) { \
synthesizeGLError(GraphicsContext3D::INVALID_OPERATION, functionName, "ArrayBufferView not " #arrayTypeMacro); \
return false; \
} \
break;
switch (type) {
case GraphicsContext3D::UNSIGNED_BYTE:
TYPE_VALIDATION_CASE(TypeUint8);
case GraphicsContext3D::BYTE:
TYPE_VALIDATION_CASE(TypeInt8);
case GraphicsContext3D::UNSIGNED_SHORT:
case GraphicsContext3D::UNSIGNED_SHORT_5_6_5:
case GraphicsContext3D::UNSIGNED_SHORT_4_4_4_4:
case GraphicsContext3D::UNSIGNED_SHORT_5_5_5_1:
TYPE_VALIDATION_CASE(TypeUint16);
case GraphicsContext3D::SHORT:
TYPE_VALIDATION_CASE(TypeInt16);
case GraphicsContext3D::UNSIGNED_INT_2_10_10_10_REV:
case GraphicsContext3D::UNSIGNED_INT_10F_11F_11F_REV:
case GraphicsContext3D::UNSIGNED_INT_5_9_9_9_REV:
case GraphicsContext3D::UNSIGNED_INT_24_8:
case GraphicsContext3D::UNSIGNED_INT:
TYPE_VALIDATION_CASE(TypeUint32);
case GraphicsContext3D::INT:
TYPE_VALIDATION_CASE(TypeInt32);
case GraphicsContext3D::FLOAT: // OES_texture_float
TYPE_VALIDATION_CASE(TypeFloat32);
case GraphicsContext3D::HALF_FLOAT_OES: // OES_texture_half_float
case GraphicsContext3D::HALF_FLOAT:
case GraphicsContext3D::FLOAT_32_UNSIGNED_INT_24_8_REV:
// As per the specification, ArrayBufferView should be null when
// OES_texture_half_float is enabled.
if (arrayType) {
synthesizeGLError(GraphicsContext3D::INVALID_OPERATION, functionName, "type HALF_FLOAT_OES but ArrayBufferView is not NULL");
return false;
}
break;
default:
ASSERT_NOT_REACHED();
return false;
}
#undef TYPE_VALIDATION_CASE
return true;
}
bool WebGLRenderingContextBase::validateTexFuncData(const char* functionName, GC3Dint level, GC3Dsizei width, GC3Dsizei height, GC3Denum internalFormat, GC3Denum format, GC3Denum type, ArrayBufferView* pixels, NullDisposition disposition)
{
if (!pixels) {
if (disposition == NullAllowed)
return true;
synthesizeGLError(GraphicsContext3D::INVALID_VALUE, functionName, "no pixels");
return false;
}
if (!validateTexFuncFormatAndType(functionName, internalFormat, format, type, level))
return false;
if (!validateSettableTexInternalFormat(functionName, internalFormat))
return false;
if (!validateArrayBufferType(functionName, type, pixels ? Optional<JSC::TypedArrayType>(pixels->getType()) : WTF::nullopt))
return false;
unsigned totalBytesRequired;
GC3Denum error = m_context->computeImageSizeInBytes(format, type, width, height, m_unpackAlignment, &totalBytesRequired, nullptr);
if (error != GraphicsContext3D::NO_ERROR) {
synthesizeGLError(error, functionName, "invalid texture dimensions");
return false;
}
if (pixels->byteLength() < totalBytesRequired) {
synthesizeGLError(GraphicsContext3D::INVALID_OPERATION, functionName, "ArrayBufferView not big enough for request");
return false;
}
return true;
}
bool WebGLRenderingContextBase::validateTexFuncParameters(const char* functionName,
TexFuncValidationFunctionType functionType,
GC3Denum target, GC3Dint level,
GC3Denum internalformat,
GC3Dsizei width, GC3Dsizei height, GC3Dint border,
GC3Denum format, GC3Denum type)
{
// We absolutely have to validate the format and type combination.
// The texImage2D entry points taking HTMLImage, etc. will produce
// temporary data based on this combination, so it must be legal.
if (!validateTexFuncFormatAndType(functionName, internalformat, format, type, level) || !validateTexFuncLevel(functionName, target, level))
return false;
if (width < 0 || height < 0) {
synthesizeGLError(GraphicsContext3D::INVALID_VALUE, functionName, "width or height < 0");
return false;
}
GC3Dint maxTextureSizeForLevel = pow(2.0, m_maxTextureLevel - 1 - level);
switch (target) {
case GraphicsContext3D::TEXTURE_2D:
if (width > maxTextureSizeForLevel || height > maxTextureSizeForLevel) {
synthesizeGLError(GraphicsContext3D::INVALID_VALUE, functionName, "width or height out of range");
return false;
}
break;
case GraphicsContext3D::TEXTURE_CUBE_MAP_POSITIVE_X:
case GraphicsContext3D::TEXTURE_CUBE_MAP_NEGATIVE_X:
case GraphicsContext3D::TEXTURE_CUBE_MAP_POSITIVE_Y:
case GraphicsContext3D::TEXTURE_CUBE_MAP_NEGATIVE_Y:
case GraphicsContext3D::TEXTURE_CUBE_MAP_POSITIVE_Z:
case GraphicsContext3D::TEXTURE_CUBE_MAP_NEGATIVE_Z:
if (functionType != TexSubImage && width != height) {
synthesizeGLError(GraphicsContext3D::INVALID_VALUE, functionName, "width != height for cube map");
return false;
}
// No need to check height here. For texImage width == height.
// For texSubImage that will be checked when checking yoffset + height is in range.
if (width > maxTextureSizeForLevel) {
synthesizeGLError(GraphicsContext3D::INVALID_VALUE, functionName, "width or height out of range for cube map");
return false;
}
break;
default:
synthesizeGLError(GraphicsContext3D::INVALID_ENUM, functionName, "invalid target");
return false;
}
if (border) {
synthesizeGLError(GraphicsContext3D::INVALID_VALUE, functionName, "border != 0");
return false;
}
return true;
}
bool WebGLRenderingContextBase::validateTexFuncFormatAndType(const char* functionName, GC3Denum internalFormat, GC3Denum format, GC3Denum type, GC3Dint level)
{
switch (format) {
case GraphicsContext3D::ALPHA:
case GraphicsContext3D::LUMINANCE:
case GraphicsContext3D::LUMINANCE_ALPHA:
case GraphicsContext3D::RGB:
case GraphicsContext3D::RGBA:
break;
case GraphicsContext3D::DEPTH_STENCIL:
case GraphicsContext3D::DEPTH_COMPONENT:
if (!m_webglDepthTexture && isWebGL1()) {
synthesizeGLError(GraphicsContext3D::INVALID_ENUM, functionName, "depth texture formats not enabled");
return false;
}
if (level > 0) {
synthesizeGLError(GraphicsContext3D::INVALID_OPERATION, functionName, "level must be 0 for depth formats");
return false;
}
break;
case Extensions3D::SRGB_EXT:
case Extensions3D::SRGB_ALPHA_EXT:
if (!m_extsRGB) {
synthesizeGLError(GraphicsContext3D::INVALID_ENUM, functionName, "sRGB texture formats not enabled");
return false;
}
break;
default:
#if ENABLE(WEBGL2)
if (!isWebGL1()) {
switch (format) {
case GraphicsContext3D::RED:
case GraphicsContext3D::RED_INTEGER:
case GraphicsContext3D::RG:
case GraphicsContext3D::RG_INTEGER:
case GraphicsContext3D::RGB_INTEGER:
case GraphicsContext3D::RGBA_INTEGER:
break;
default:
synthesizeGLError(GraphicsContext3D::INVALID_ENUM, functionName, "invalid texture format");
return false;
}
} else
#endif
{
synthesizeGLError(GraphicsContext3D::INVALID_ENUM, functionName, "invalid texture format");
return false;
}
}
switch (type) {
case GraphicsContext3D::UNSIGNED_BYTE:
case GraphicsContext3D::UNSIGNED_SHORT_5_6_5:
case GraphicsContext3D::UNSIGNED_SHORT_4_4_4_4:
case GraphicsContext3D::UNSIGNED_SHORT_5_5_5_1:
break;
case GraphicsContext3D::FLOAT:
if (!m_oesTextureFloat && isWebGL1()) {
synthesizeGLError(GraphicsContext3D::INVALID_ENUM, functionName, "invalid texture type");
return false;
}
break;
case GraphicsContext3D::HALF_FLOAT:
case GraphicsContext3D::HALF_FLOAT_OES:
if (!m_oesTextureHalfFloat && isWebGL1()) {
synthesizeGLError(GraphicsContext3D::INVALID_ENUM, functionName, "invalid texture type");
return false;
}
break;
case GraphicsContext3D::UNSIGNED_INT:
case GraphicsContext3D::UNSIGNED_INT_24_8:
case GraphicsContext3D::UNSIGNED_SHORT:
if (!m_webglDepthTexture && isWebGL1()) {
synthesizeGLError(GraphicsContext3D::INVALID_ENUM, functionName, "invalid texture type");
return false;
}
break;
default:
#if ENABLE(WEBGL2)
if (!isWebGL1()) {
switch (type) {
case GraphicsContext3D::BYTE:
case GraphicsContext3D::SHORT:
case GraphicsContext3D::INT:
case GraphicsContext3D::UNSIGNED_INT_2_10_10_10_REV:
case GraphicsContext3D::UNSIGNED_INT_10F_11F_11F_REV:
case GraphicsContext3D::UNSIGNED_INT_5_9_9_9_REV:
case GraphicsContext3D::FLOAT_32_UNSIGNED_INT_24_8_REV:
break;
default:
synthesizeGLError(GraphicsContext3D::INVALID_ENUM, functionName, "invalid texture type");
return false;
}
} else
#endif
{
synthesizeGLError(GraphicsContext3D::INVALID_ENUM, functionName, "invalid texture type");
return false;
}
}
// Verify that the combination of internalformat, format, and type is supported.
#define INTERNAL_FORMAT_CASE(internalFormatMacro, formatMacro, type0, type1, type2, type3, type4) case GraphicsContext3D::internalFormatMacro: \
if (format != GraphicsContext3D::formatMacro) { \
synthesizeGLError(GraphicsContext3D::INVALID_OPERATION, functionName, "invalid format for internalformat"); \
return false; \
} \
if (type != type0 && type != type1 && type != type2 && type != type3 && type != type4) { \
if (type != GraphicsContext3D::HALF_FLOAT_OES || (type0 != GraphicsContext3D::HALF_FLOAT && type1 != GraphicsContext3D::HALF_FLOAT && type2 != GraphicsContext3D::HALF_FLOAT && type3 != GraphicsContext3D::HALF_FLOAT)) { \
synthesizeGLError(GraphicsContext3D::INVALID_OPERATION, functionName, "invalid type for internalformat"); \
return false; \
} \
} \
break;
switch (internalFormat) {
INTERNAL_FORMAT_CASE(RGB , RGB , GraphicsContext3D::UNSIGNED_BYTE , GraphicsContext3D::UNSIGNED_SHORT_5_6_5 , GraphicsContext3D::HALF_FLOAT , GraphicsContext3D::FLOAT , 0 );
INTERNAL_FORMAT_CASE(RGBA , RGBA , GraphicsContext3D::UNSIGNED_BYTE , GraphicsContext3D::UNSIGNED_SHORT_4_4_4_4, GraphicsContext3D::UNSIGNED_SHORT_5_5_5_1 , GraphicsContext3D::HALF_FLOAT, GraphicsContext3D::FLOAT);
INTERNAL_FORMAT_CASE(LUMINANCE_ALPHA , LUMINANCE_ALPHA, GraphicsContext3D::UNSIGNED_BYTE , GraphicsContext3D::HALF_FLOAT , GraphicsContext3D::FLOAT , 0 , 0 );
INTERNAL_FORMAT_CASE(LUMINANCE , LUMINANCE , GraphicsContext3D::UNSIGNED_BYTE , GraphicsContext3D::HALF_FLOAT , GraphicsContext3D::FLOAT , 0 , 0 );
INTERNAL_FORMAT_CASE(ALPHA , ALPHA , GraphicsContext3D::UNSIGNED_BYTE , GraphicsContext3D::HALF_FLOAT , GraphicsContext3D::FLOAT , 0 , 0 );
INTERNAL_FORMAT_CASE(R8 , RED , GraphicsContext3D::UNSIGNED_BYTE , 0 , 0 , 0 , 0 );
INTERNAL_FORMAT_CASE(R8_SNORM , RED , GraphicsContext3D::BYTE , 0 , 0 , 0 , 0 );
INTERNAL_FORMAT_CASE(R16F , RED , GraphicsContext3D::HALF_FLOAT , GraphicsContext3D::FLOAT , 0 , 0 , 0 );
INTERNAL_FORMAT_CASE(R32F , RED , GraphicsContext3D::FLOAT , 0 , 0 , 0 , 0 );
INTERNAL_FORMAT_CASE(R8UI , RED_INTEGER , GraphicsContext3D::UNSIGNED_BYTE , 0 , 0 , 0 , 0 );
INTERNAL_FORMAT_CASE(R8I , RED_INTEGER , GraphicsContext3D::BYTE , 0 , 0 , 0 , 0 );
INTERNAL_FORMAT_CASE(R16UI , RED_INTEGER , GraphicsContext3D::UNSIGNED_SHORT , 0 , 0 , 0 , 0 );
INTERNAL_FORMAT_CASE(R16I , RED_INTEGER , GraphicsContext3D::SHORT , 0 , 0 , 0 , 0 );
INTERNAL_FORMAT_CASE(R32UI , RED_INTEGER , GraphicsContext3D::UNSIGNED_INT , 0 , 0 , 0 , 0 );
INTERNAL_FORMAT_CASE(R32I , RED_INTEGER , GraphicsContext3D::INT , 0 , 0 , 0 , 0 );
INTERNAL_FORMAT_CASE(RG8 , RG , GraphicsContext3D::UNSIGNED_BYTE , 0 , 0 , 0 , 0 );
INTERNAL_FORMAT_CASE(RG8_SNORM , RG , GraphicsContext3D::BYTE , 0 , 0 , 0 , 0 );
INTERNAL_FORMAT_CASE(RG16F , RG , GraphicsContext3D::HALF_FLOAT , GraphicsContext3D::FLOAT , 0 , 0 , 0 );
INTERNAL_FORMAT_CASE(RG32F , RG , GraphicsContext3D::FLOAT , 0 , 0 , 0 , 0 );
INTERNAL_FORMAT_CASE(RG8UI , RG_INTEGER , GraphicsContext3D::UNSIGNED_BYTE , 0 , 0 , 0 , 0 );
INTERNAL_FORMAT_CASE(RG8I , RG_INTEGER , GraphicsContext3D::BYTE , 0 , 0 , 0 , 0 );
INTERNAL_FORMAT_CASE(RG16UI , RG_INTEGER , GraphicsContext3D::UNSIGNED_SHORT , 0 , 0 , 0 , 0 );
INTERNAL_FORMAT_CASE(RG16I , RG_INTEGER , GraphicsContext3D::SHORT , 0 , 0 , 0 , 0 );
INTERNAL_FORMAT_CASE(RG32UI , RG_INTEGER , GraphicsContext3D::UNSIGNED_INT , 0 , 0 , 0 , 0 );
INTERNAL_FORMAT_CASE(RG32I , RG_INTEGER , GraphicsContext3D::INT , 0 , 0 , 0 , 0 );
INTERNAL_FORMAT_CASE(RGB8 , RGB , GraphicsContext3D::UNSIGNED_BYTE , 0 , 0 , 0 , 0 );
INTERNAL_FORMAT_CASE(SRGB8 , RGB , GraphicsContext3D::UNSIGNED_BYTE , 0 , 0 , 0 , 0 );
INTERNAL_FORMAT_CASE(RGB565 , RGB , GraphicsContext3D::UNSIGNED_BYTE , GraphicsContext3D::UNSIGNED_SHORT_5_6_5 , 0 , 0 , 0 );
INTERNAL_FORMAT_CASE(RGB8_SNORM , RGB , GraphicsContext3D::BYTE , 0 , 0 , 0 , 0 );
INTERNAL_FORMAT_CASE(R11F_G11F_B10F , RGB , GraphicsContext3D::UNSIGNED_INT_10F_11F_11F_REV , GraphicsContext3D::HALF_FLOAT , GraphicsContext3D::FLOAT , 0 , 0 );
INTERNAL_FORMAT_CASE(RGB9_E5 , RGB , GraphicsContext3D::UNSIGNED_INT_5_9_9_9_REV , GraphicsContext3D::HALF_FLOAT , GraphicsContext3D::FLOAT , 0 , 0 );
INTERNAL_FORMAT_CASE(RGB16F , RGB , GraphicsContext3D::HALF_FLOAT , GraphicsContext3D::FLOAT , 0 , 0 , 0 );
INTERNAL_FORMAT_CASE(RGB32F , RGB , GraphicsContext3D::FLOAT , 0 , 0 , 0 , 0 );
INTERNAL_FORMAT_CASE(RGB8UI , RGB_INTEGER , GraphicsContext3D::UNSIGNED_BYTE , 0 , 0 , 0 , 0 );
INTERNAL_FORMAT_CASE(RGB8I , RGB_INTEGER , GraphicsContext3D::BYTE , 0 , 0 , 0 , 0 );
INTERNAL_FORMAT_CASE(RGB16UI , RGB_INTEGER , GraphicsContext3D::UNSIGNED_SHORT , 0 , 0 , 0 , 0 );
INTERNAL_FORMAT_CASE(RGB16I , RGB_INTEGER , GraphicsContext3D::SHORT , 0 , 0 , 0 , 0 );
INTERNAL_FORMAT_CASE(RGB32UI , RGB_INTEGER , GraphicsContext3D::UNSIGNED_INT , 0 , 0 , 0 , 0 );
INTERNAL_FORMAT_CASE(RGB32I , RGB_INTEGER , GraphicsContext3D::INT , 0 , 0 , 0 , 0 );
INTERNAL_FORMAT_CASE(RGBA8 , RGBA , GraphicsContext3D::UNSIGNED_BYTE , 0 , 0 , 0 , 0 );
INTERNAL_FORMAT_CASE(SRGB8_ALPHA8 , RGBA , GraphicsContext3D::UNSIGNED_BYTE , 0 , 0 , 0 , 0 );
INTERNAL_FORMAT_CASE(RGBA8_SNORM , RGBA , GraphicsContext3D::BYTE , 0 , 0 , 0 , 0 );
INTERNAL_FORMAT_CASE(RGB5_A1 , RGBA , GraphicsContext3D::UNSIGNED_BYTE , GraphicsContext3D::UNSIGNED_SHORT_5_5_5_1, GraphicsContext3D::UNSIGNED_INT_2_10_10_10_REV , 0 , 0 );
INTERNAL_FORMAT_CASE(RGBA4 , RGBA , GraphicsContext3D::UNSIGNED_BYTE , GraphicsContext3D::UNSIGNED_SHORT_4_4_4_4, 0 , 0 , 0 );
INTERNAL_FORMAT_CASE(RGB10_A2 , RGBA , GraphicsContext3D::UNSIGNED_INT_2_10_10_10_REV , 0 , 0 , 0 , 0 );
INTERNAL_FORMAT_CASE(RGBA16F , RGBA , GraphicsContext3D::HALF_FLOAT , GraphicsContext3D::FLOAT , 0 , 0 , 0 );
INTERNAL_FORMAT_CASE(RGBA32F , RGBA , GraphicsContext3D::FLOAT , 0 , 0 , 0 , 0 );
INTERNAL_FORMAT_CASE(RGBA8UI , RGBA_INTEGER , GraphicsContext3D::UNSIGNED_BYTE , 0 , 0 , 0 , 0 );
INTERNAL_FORMAT_CASE(RGBA8I , RGBA_INTEGER , GraphicsContext3D::BYTE , 0 , 0 , 0 , 0 );
INTERNAL_FORMAT_CASE(RGB10_A2UI , RGBA_INTEGER , GraphicsContext3D::UNSIGNED_INT_2_10_10_10_REV , 0 , 0 , 0 , 0 );
INTERNAL_FORMAT_CASE(RGBA16UI , RGBA_INTEGER , GraphicsContext3D::UNSIGNED_SHORT , 0 , 0 , 0 , 0 );
INTERNAL_FORMAT_CASE(RGBA16I , RGBA_INTEGER , GraphicsContext3D::SHORT , 0 , 0 , 0 , 0 );
INTERNAL_FORMAT_CASE(RGBA32I , RGBA_INTEGER , GraphicsContext3D::INT , 0 , 0 , 0 , 0 );
INTERNAL_FORMAT_CASE(RGBA32UI , RGBA_INTEGER , GraphicsContext3D::UNSIGNED_INT , 0 , 0 , 0 , 0 );
INTERNAL_FORMAT_CASE(DEPTH_COMPONENT , DEPTH_COMPONENT, GraphicsContext3D::UNSIGNED_SHORT , GraphicsContext3D::UNSIGNED_INT , 0 , 0 , 0 );
INTERNAL_FORMAT_CASE(DEPTH_COMPONENT16 , DEPTH_COMPONENT, GraphicsContext3D::UNSIGNED_SHORT , GraphicsContext3D::UNSIGNED_INT , 0 , 0 , 0 );
INTERNAL_FORMAT_CASE(DEPTH_COMPONENT24 , DEPTH_COMPONENT, GraphicsContext3D::UNSIGNED_INT , 0 , 0 , 0 , 0 );
INTERNAL_FORMAT_CASE(DEPTH_COMPONENT32F, DEPTH_COMPONENT, GraphicsContext3D::FLOAT , 0 , 0 , 0 , 0 );
INTERNAL_FORMAT_CASE(DEPTH_STENCIL , DEPTH_STENCIL , GraphicsContext3D::UNSIGNED_INT_24_8 , 0 , 0 , 0 , 0 );
INTERNAL_FORMAT_CASE(DEPTH24_STENCIL8 , DEPTH_STENCIL , GraphicsContext3D::UNSIGNED_INT_24_8 , 0 , 0 , 0 , 0 );
INTERNAL_FORMAT_CASE(DEPTH32F_STENCIL8 , DEPTH_STENCIL , GraphicsContext3D::FLOAT_32_UNSIGNED_INT_24_8_REV, 0 , 0 , 0 , 0 );
case Extensions3D::SRGB_EXT:
if (format != internalFormat) {
synthesizeGLError(GraphicsContext3D::INVALID_OPERATION, functionName, "format and internalformat must match");
return false;
}
if (type != GraphicsContext3D::UNSIGNED_BYTE && type != GraphicsContext3D::UNSIGNED_SHORT_5_6_5 && type != GraphicsContext3D::FLOAT && type != GraphicsContext3D::HALF_FLOAT_OES && type != GraphicsContext3D::HALF_FLOAT) {
synthesizeGLError(GraphicsContext3D::INVALID_OPERATION, functionName, "invalid type for internal format");
return false;
}
break;
case Extensions3D::SRGB_ALPHA_EXT:
if (format != internalFormat) {
synthesizeGLError(GraphicsContext3D::INVALID_OPERATION, functionName, "format and internalformat must match");
return false;
}
if (type != GraphicsContext3D::UNSIGNED_BYTE && type != GraphicsContext3D::UNSIGNED_SHORT_4_4_4_4 && type != GraphicsContext3D::UNSIGNED_SHORT_5_5_5_1 && type != GraphicsContext3D::FLOAT && type != GraphicsContext3D::HALF_FLOAT_OES && type != GraphicsContext3D::HALF_FLOAT) {
synthesizeGLError(GraphicsContext3D::INVALID_OPERATION, functionName, "invalid type for internal format");
return false;
}
break;
default:
synthesizeGLError(GraphicsContext3D::INVALID_OPERATION, functionName, "Unknown internal format");
return false;
}
#undef INTERNAL_FORMAT_CASE
return true;
}
void WebGLRenderingContextBase::texSubImage2DBase(GC3Denum target, GC3Dint level, GC3Dint xoffset, GC3Dint yoffset, GC3Dsizei width, GC3Dsizei height, GC3Denum internalFormat, GC3Denum format, GC3Denum type, const void* pixels)
{
ASSERT(!isContextLost());
ASSERT(validateTexFuncParameters("texSubImage2D", TexSubImage, target, level, internalFormat, width, height, 0, format, type));
ASSERT(validateSize("texSubImage2D", xoffset, yoffset));
ASSERT(validateSettableTexInternalFormat("texSubImage2D", internalFormat));
auto tex = validateTextureBinding("texSubImage2D", target, true);
if (!tex) {
ASSERT_NOT_REACHED();
return;
}
ASSERT((xoffset + width) >= 0);
ASSERT((yoffset + height) >= 0);
ASSERT(tex->getWidth(target, level) >= (xoffset + width));
ASSERT(tex->getHeight(target, level) >= (yoffset + height));
ASSERT_UNUSED(internalFormat, tex->getInternalFormat(target, level) == internalFormat);
m_context->texSubImage2D(target, level, xoffset, yoffset, width, height, format, type, pixels);
}
void WebGLRenderingContextBase::copyTexImage2D(GC3Denum target, GC3Dint level, GC3Denum internalFormat, GC3Dint x, GC3Dint y, GC3Dsizei width, GC3Dsizei height, GC3Dint border)
{
if (isContextLostOrPending())
return;
if (!validateTexFuncParameters("copyTexImage2D", CopyTexImage, target, level, internalFormat, width, height, border, internalFormat, GraphicsContext3D::UNSIGNED_BYTE))
return;
if (!validateSettableTexInternalFormat("copyTexImage2D", internalFormat))
return;
auto tex = validateTextureBinding("copyTexImage2D", target, true);
if (!tex)
return;
if (!isTexInternalFormatColorBufferCombinationValid(internalFormat, getBoundFramebufferColorFormat())) {
synthesizeGLError(GraphicsContext3D::INVALID_OPERATION, "copyTexImage2D", "framebuffer is incompatible format");
return;
}
if (!isGLES2NPOTStrict() && level && WebGLTexture::isNPOT(width, height)) {
synthesizeGLError(GraphicsContext3D::INVALID_VALUE, "copyTexImage2D", "level > 0 not power of 2");
return;
}
const char* reason = "framebuffer incomplete";
if (m_framebufferBinding && !m_framebufferBinding->onAccess(graphicsContext3D(), &reason)) {
synthesizeGLError(GraphicsContext3D::INVALID_FRAMEBUFFER_OPERATION, "copyTexImage2D", reason);
return;
}
clearIfComposited();
GC3Dint clippedX, clippedY;
GC3Dsizei clippedWidth, clippedHeight;
if (clip2D(x, y, width, height, getBoundFramebufferWidth(), getBoundFramebufferHeight(), &clippedX, &clippedY, &clippedWidth, &clippedHeight)) {
m_context->texImage2DResourceSafe(target, level, internalFormat, width, height, border,
internalFormat, GraphicsContext3D::UNSIGNED_BYTE, m_unpackAlignment);
if (clippedWidth > 0 && clippedHeight > 0) {
m_context->copyTexSubImage2D(target, level, clippedX - x, clippedY - y,
clippedX, clippedY, clippedWidth, clippedHeight);
}
} else
m_context->copyTexImage2D(target, level, internalFormat, x, y, width, height, border);
// FIXME: if the framebuffer is not complete, none of the below should be executed.
tex->setLevelInfo(target, level, internalFormat, width, height, GraphicsContext3D::UNSIGNED_BYTE);
}
static bool isRGBFormat(GC3Denum internalFormat)
{
return internalFormat == GraphicsContext3D::RGB
|| internalFormat == GraphicsContext3D::RGBA
|| internalFormat == GraphicsContext3D::RGB8
|| internalFormat == GraphicsContext3D::RGBA8;
}
ExceptionOr<void> WebGLRenderingContextBase::texImage2D(GC3Denum target, GC3Dint level, GC3Denum internalformat, GC3Denum format, GC3Denum type, Optional<TexImageSource> source)
{
if (!source) {
synthesizeGLError(GraphicsContext3D::INVALID_VALUE, "texImage2D", "source is null");
return { };
}
auto visitor = WTF::makeVisitor([&](const RefPtr<ImageBitmap>& bitmap) -> ExceptionOr<void> {
if (isContextLostOrPending() || !validateTexFunc("texImage2D", TexImage, SourceImageBitmap, target, level, internalformat, bitmap->width(), bitmap->height(), 0, format, type, 0, 0))
return { };
ImageBuffer* buffer = bitmap->buffer();
if (!buffer)
return { };
auto texture = validateTextureBinding("texImage2D", target, true);
// If possible, copy from the bitmap directly to the texture
// via the GPU, without a read-back to system memory.
//
// FIXME: restriction of (RGB || RGBA)/UNSIGNED_BYTE should be lifted when
// ImageBuffer::copyToPlatformTexture implementations are fully functional.
if (texture
&& (format == GraphicsContext3D::RGB || format == GraphicsContext3D::RGBA)
&& type == GraphicsContext3D::UNSIGNED_BYTE) {
auto textureInternalFormat = texture->getInternalFormat(target, level);
if (isRGBFormat(textureInternalFormat) || !texture->isValid(target, level)) {
if (buffer->copyToPlatformTexture(*m_context.get(), target, texture->object(), internalformat, m_unpackPremultiplyAlpha, m_unpackFlipY)) {
texture->setLevelInfo(target, level, internalformat, bitmap->width(), bitmap->height(), type);
return { };
}
}
}
// Normal pure SW path.
RefPtr<Image> image = buffer->copyImage(ImageBuffer::fastCopyImageMode());
if (image)
texImage2DImpl(target, level, internalformat, format, type, image.get(), GraphicsContext3D::HtmlDomImage, m_unpackFlipY, m_unpackPremultiplyAlpha);
return { };
}, [&](const RefPtr<ImageData>& pixels) -> ExceptionOr<void> {
if (isContextLostOrPending() || !validateTexFunc("texImage2D", TexImage, SourceImageData, target, level, internalformat, pixels->width(), pixels->height(), 0, format, type, 0, 0))
return { };
Vector<uint8_t> data;
bool needConversion = true;
// The data from ImageData is always of format RGBA8.
// No conversion is needed if destination format is RGBA and type is USIGNED_BYTE and no Flip or Premultiply operation is required.
if (!m_unpackFlipY && !m_unpackPremultiplyAlpha && format == GraphicsContext3D::RGBA && type == GraphicsContext3D::UNSIGNED_BYTE)
needConversion = false;
else {
if (!m_context->extractImageData(pixels.get(), format, type, m_unpackFlipY, m_unpackPremultiplyAlpha, data)) {
synthesizeGLError(GraphicsContext3D::INVALID_VALUE, "texImage2D", "bad image data");
return { };
}
}
if (m_unpackAlignment != 1)
m_context->pixelStorei(GraphicsContext3D::UNPACK_ALIGNMENT, 1);
texImage2DBase(target, level, internalformat, pixels->width(), pixels->height(), 0, format, type, needConversion ? data.data() : pixels->data()->data());
if (m_unpackAlignment != 1)
m_context->pixelStorei(GraphicsContext3D::UNPACK_ALIGNMENT, m_unpackAlignment);
return { };
}, [&](const RefPtr<HTMLImageElement>& image) -> ExceptionOr<void> {
if (isContextLostOrPending())
return { };
auto validationResult = validateHTMLImageElement("texImage2D", image.get());
if (validationResult.hasException())
return validationResult.releaseException();
if (!validationResult.returnValue())
return { };
RefPtr<Image> imageForRender = image->cachedImage()->imageForRenderer(image->renderer());
if (!imageForRender)
return { };
if (imageForRender->isSVGImage())
imageForRender = drawImageIntoBuffer(*imageForRender, image->width(), image->height(), 1);
if (!imageForRender || !validateTexFunc("texImage2D", TexImage, SourceHTMLImageElement, target, level, internalformat, imageForRender->width(), imageForRender->height(), 0, format, type, 0, 0))
return { };
texImage2DImpl(target, level, internalformat, format, type, imageForRender.get(), GraphicsContext3D::HtmlDomImage, m_unpackFlipY, m_unpackPremultiplyAlpha);
return { };
}, [&](const RefPtr<HTMLCanvasElement>& canvas) -> ExceptionOr<void> {
if (isContextLostOrPending())
return { };
auto validationResult = validateHTMLCanvasElement("texImage2D", canvas.get());
if (validationResult.hasException())
return validationResult.releaseException();
if (!validationResult.returnValue())
return { };
if (!validateTexFunc("texImage2D", TexImage, SourceHTMLCanvasElement, target, level, internalformat, canvas->width(), canvas->height(), 0, format, type, 0, 0))
return { };
auto texture = validateTextureBinding("texImage2D", target, true);
// If possible, copy from the canvas element directly to the texture
// via the GPU, without a read-back to system memory.
//
// FIXME: restriction of (RGB || RGBA)/UNSIGNED_BYTE should be lifted when
// ImageBuffer::copyToPlatformTexture implementations are fully functional.
if (texture
&& (format == GraphicsContext3D::RGB || format == GraphicsContext3D::RGBA)
&& type == GraphicsContext3D::UNSIGNED_BYTE) {
auto textureInternalFormat = texture->getInternalFormat(target, level);
if (isRGBFormat(textureInternalFormat) || !texture->isValid(target, level)) {
ImageBuffer* buffer = canvas->buffer();
if (buffer && buffer->copyToPlatformTexture(*m_context.get(), target, texture->object(), internalformat, m_unpackPremultiplyAlpha, m_unpackFlipY)) {
texture->setLevelInfo(target, level, internalformat, canvas->width(), canvas->height(), type);
return { };
}
}
}
RefPtr<ImageData> imageData = canvas->getImageData();
if (imageData)
texImage2D(target, level, internalformat, format, type, TexImageSource(imageData.get()));
else
texImage2DImpl(target, level, internalformat, format, type, canvas->copiedImage(), GraphicsContext3D::HtmlDomCanvas, m_unpackFlipY, m_unpackPremultiplyAlpha);
return { };
}
#if ENABLE(VIDEO)
, [&](const RefPtr<HTMLVideoElement>& video) -> ExceptionOr<void> {
if (isContextLostOrPending())
return { };
auto validationResult = validateHTMLVideoElement("texImage2D", video.get());
if (validationResult.hasException())
return validationResult.releaseException();
if (!validationResult.returnValue())
return { };
if (!validateTexFunc("texImage2D", TexImage, SourceHTMLVideoElement, target, level, internalformat, video->videoWidth(), video->videoHeight(), 0, format, type, 0, 0))
return { };
// Go through the fast path doing a GPU-GPU textures copy without a readback to system memory if possible.
// Otherwise, it will fall back to the normal SW path.
// FIXME: The current restrictions require that format shoud be RGB or RGBA,
// type should be UNSIGNED_BYTE and level should be 0. It may be lifted in the future.
auto texture = validateTextureBinding("texImage2D", target, true);
if (GraphicsContext3D::TEXTURE_2D == target && texture
&& (format == GraphicsContext3D::RGB || format == GraphicsContext3D::RGBA)
&& type == GraphicsContext3D::UNSIGNED_BYTE
&& !level) {
auto textureInternalFormat = texture->getInternalFormat(target, level);
if (isRGBFormat(textureInternalFormat) || !texture->isValid(target, level)) {
if (video->copyVideoTextureToPlatformTexture(m_context.get(), texture->object(), target, level, internalformat, format, type, m_unpackPremultiplyAlpha, m_unpackFlipY)) {
texture->setLevelInfo(target, level, internalformat, video->videoWidth(), video->videoHeight(), type);
return { };
}
}
}
// Normal pure SW path.
RefPtr<Image> image = videoFrameToImage(video.get(), ImageBuffer::fastCopyImageMode());
if (!image)
return { };
texImage2DImpl(target, level, internalformat, format, type, image.get(), GraphicsContext3D::HtmlDomVideo, m_unpackFlipY, m_unpackPremultiplyAlpha);
return { };
}
#endif
);
return WTF::visit(visitor, source.value());
}
RefPtr<Image> WebGLRenderingContextBase::drawImageIntoBuffer(Image& image, int width, int height, int deviceScaleFactor)
{
IntSize size(width, height);
size.scale(deviceScaleFactor);
ImageBuffer* buf = m_generatedImageCache.imageBuffer(size);
if (!buf) {
synthesizeGLError(GraphicsContext3D::OUT_OF_MEMORY, "texImage2D", "out of memory");
return nullptr;
}
FloatRect srcRect(FloatPoint(), image.size());
FloatRect destRect(FloatPoint(), size);
buf->context().drawImage(image, destRect, srcRect);
return buf->copyImage(ImageBuffer::fastCopyImageMode());
}
#if ENABLE(VIDEO)
RefPtr<Image> WebGLRenderingContextBase::videoFrameToImage(HTMLVideoElement* video, BackingStoreCopy backingStoreCopy)
{
IntSize size(video->videoWidth(), video->videoHeight());
ImageBuffer* buf = m_generatedImageCache.imageBuffer(size);
if (!buf) {
synthesizeGLError(GraphicsContext3D::OUT_OF_MEMORY, "texImage2D", "out of memory");
return nullptr;
}
FloatRect destRect(0, 0, size.width(), size.height());
// FIXME: Turn this into a GPU-GPU texture copy instead of CPU readback.
video->paintCurrentFrameInContext(buf->context(), destRect);
return buf->copyImage(backingStoreCopy);
}
#endif
void WebGLRenderingContextBase::texParameter(GC3Denum target, GC3Denum pname, GC3Dfloat paramf, GC3Dint parami, bool isFloat)
{
if (isContextLostOrPending())
return;
auto tex = validateTextureBinding("texParameter", target, false);
if (!tex)
return;
switch (pname) {
case GraphicsContext3D::TEXTURE_MIN_FILTER:
case GraphicsContext3D::TEXTURE_MAG_FILTER:
break;
case GraphicsContext3D::TEXTURE_WRAP_S:
case GraphicsContext3D::TEXTURE_WRAP_T:
if ((isFloat && paramf != GraphicsContext3D::CLAMP_TO_EDGE && paramf != GraphicsContext3D::MIRRORED_REPEAT && paramf != GraphicsContext3D::REPEAT)
|| (!isFloat && parami != GraphicsContext3D::CLAMP_TO_EDGE && parami != GraphicsContext3D::MIRRORED_REPEAT && parami != GraphicsContext3D::REPEAT)) {
synthesizeGLError(GraphicsContext3D::INVALID_ENUM, "texParameter", "invalid parameter");
return;
}
break;
case Extensions3D::TEXTURE_MAX_ANISOTROPY_EXT: // EXT_texture_filter_anisotropic
if (!m_extTextureFilterAnisotropic) {
synthesizeGLError(GraphicsContext3D::INVALID_ENUM, "texParameter", "invalid parameter, EXT_texture_filter_anisotropic not enabled");
return;
}
break;
default:
synthesizeGLError(GraphicsContext3D::INVALID_ENUM, "texParameter", "invalid parameter name");
return;
}
if (isFloat) {
tex->setParameterf(pname, paramf);
m_context->texParameterf(target, pname, paramf);
} else {
tex->setParameteri(pname, parami);
m_context->texParameteri(target, pname, parami);
}
}
void WebGLRenderingContextBase::texParameterf(GC3Denum target, GC3Denum pname, GC3Dfloat param)
{
texParameter(target, pname, param, 0, true);
}
void WebGLRenderingContextBase::texParameteri(GC3Denum target, GC3Denum pname, GC3Dint param)
{
texParameter(target, pname, 0, param, false);
}
void WebGLRenderingContextBase::uniform1f(const WebGLUniformLocation* location, GC3Dfloat x)
{
if (isContextLostOrPending() || !location)
return;
if (location->program() != m_currentProgram) {
synthesizeGLError(GraphicsContext3D::INVALID_OPERATION, "uniform1f", "location not for current program");
return;
}
m_context->uniform1f(location->location(), x);
}
void WebGLRenderingContextBase::uniform2f(const WebGLUniformLocation* location, GC3Dfloat x, GC3Dfloat y)
{
if (isContextLostOrPending() || !location)
return;
if (location->program() != m_currentProgram) {
synthesizeGLError(GraphicsContext3D::INVALID_OPERATION, "uniform2f", "location not for current program");
return;
}
m_context->uniform2f(location->location(), x, y);
}
void WebGLRenderingContextBase::uniform3f(const WebGLUniformLocation* location, GC3Dfloat x, GC3Dfloat y, GC3Dfloat z)
{
if (isContextLostOrPending() || !location)
return;
if (location->program() != m_currentProgram) {
synthesizeGLError(GraphicsContext3D::INVALID_OPERATION, "uniform3f", "location not for current program");
return;
}
m_context->uniform3f(location->location(), x, y, z);
}
void WebGLRenderingContextBase::uniform4f(const WebGLUniformLocation* location, GC3Dfloat x, GC3Dfloat y, GC3Dfloat z, GC3Dfloat w)
{
if (isContextLostOrPending() || !location)
return;
if (location->program() != m_currentProgram) {
synthesizeGLError(GraphicsContext3D::INVALID_OPERATION, "uniform4f", "location not for current program");
return;
}
m_context->uniform4f(location->location(), x, y, z, w);
}
void WebGLRenderingContextBase::uniform1i(const WebGLUniformLocation* location, GC3Dint x)
{
if (isContextLostOrPending() || !location)
return;
if (location->program() != m_currentProgram) {
synthesizeGLError(GraphicsContext3D::INVALID_OPERATION, "uniform1i", "location not for current program");
return;
}
if ((location->type() == GraphicsContext3D::SAMPLER_2D || location->type() == GraphicsContext3D::SAMPLER_CUBE) && x >= (int)m_textureUnits.size()) {
synthesizeGLError(GraphicsContext3D::INVALID_VALUE, "uniform1i", "invalid texture unit");
return;
}
m_context->uniform1i(location->location(), x);
}
void WebGLRenderingContextBase::uniform2i(const WebGLUniformLocation* location, GC3Dint x, GC3Dint y)
{
if (isContextLostOrPending() || !location)
return;
if (location->program() != m_currentProgram) {
synthesizeGLError(GraphicsContext3D::INVALID_OPERATION, "uniform2i", "location not for current program");
return;
}
m_context->uniform2i(location->location(), x, y);
}
void WebGLRenderingContextBase::uniform3i(const WebGLUniformLocation* location, GC3Dint x, GC3Dint y, GC3Dint z)
{
if (isContextLostOrPending() || !location)
return;
if (location->program() != m_currentProgram) {
synthesizeGLError(GraphicsContext3D::INVALID_OPERATION, "uniform3i", "location not for current program");
return;
}
m_context->uniform3i(location->location(), x, y, z);
}
void WebGLRenderingContextBase::uniform4i(const WebGLUniformLocation* location, GC3Dint x, GC3Dint y, GC3Dint z, GC3Dint w)
{
if (isContextLostOrPending() || !location)
return;
if (location->program() != m_currentProgram) {
synthesizeGLError(GraphicsContext3D::INVALID_OPERATION, "uniform4i", "location not for current program");
return;
}
m_context->uniform4i(location->location(), x, y, z, w);
}
void WebGLRenderingContextBase::uniform1fv(const WebGLUniformLocation* location, Float32List&& v)
{
if (isContextLostOrPending() || !validateUniformParameters("uniform1fv", location, v, 1))
return;
m_context->uniform1fv(location->location(), v.length(), v.data());
}
void WebGLRenderingContextBase::uniform2fv(const WebGLUniformLocation* location, Float32List&& v)
{
if (isContextLostOrPending() || !validateUniformParameters("uniform2fv", location, v, 2))
return;
m_context->uniform2fv(location->location(), v.length() / 2, v.data());
}
void WebGLRenderingContextBase::uniform3fv(const WebGLUniformLocation* location, Float32List&& v)
{
if (isContextLostOrPending() || !validateUniformParameters("uniform3fv", location, v, 3))
return;
m_context->uniform3fv(location->location(), v.length() / 3, v.data());
}
void WebGLRenderingContextBase::uniform4fv(const WebGLUniformLocation* location, Float32List&& v)
{
if (isContextLostOrPending() || !validateUniformParameters("uniform4fv", location, v, 4))
return;
m_context->uniform4fv(location->location(), v.length() / 4, v.data());
}
void WebGLRenderingContextBase::uniform1iv(const WebGLUniformLocation* location, Int32List&& v)
{
if (isContextLostOrPending() || !validateUniformParameters("uniform1iv", location, v, 1))
return;
auto data = v.data();
auto length = v.length();
if (location->type() == GraphicsContext3D::SAMPLER_2D || location->type() == GraphicsContext3D::SAMPLER_CUBE) {
for (auto i = 0; i < length; ++i) {
if (data[i] >= static_cast<int>(m_textureUnits.size())) {
LOG(WebGL, "Texture unit size=%zu, v[%d]=%d. Location type = %04X.", m_textureUnits.size(), i, data[i], location->type());
synthesizeGLError(GraphicsContext3D::INVALID_VALUE, "uniform1iv", "invalid texture unit");
return;
}
}
}
m_context->uniform1iv(location->location(), length, data);
}
void WebGLRenderingContextBase::uniform2iv(const WebGLUniformLocation* location, Int32List&& v)
{
if (isContextLostOrPending() || !validateUniformParameters("uniform2iv", location, v, 2))
return;
m_context->uniform2iv(location->location(), v.length() / 2, v.data());
}
void WebGLRenderingContextBase::uniform3iv(const WebGLUniformLocation* location, Int32List&& v)
{
if (isContextLostOrPending() || !validateUniformParameters("uniform3iv", location, v, 3))
return;
m_context->uniform3iv(location->location(), v.length() / 3, v.data());
}
void WebGLRenderingContextBase::uniform4iv(const WebGLUniformLocation* location, Int32List&& v)
{
if (isContextLostOrPending() || !validateUniformParameters("uniform4iv", location, v, 4))
return;
m_context->uniform4iv(location->location(), v.length() / 4, v.data());
}
void WebGLRenderingContextBase::uniformMatrix2fv(const WebGLUniformLocation* location, GC3Dboolean transpose, Float32List&& v)
{
if (isContextLostOrPending() || !validateUniformMatrixParameters("uniformMatrix2fv", location, transpose, v, 4))
return;
m_context->uniformMatrix2fv(location->location(), v.length() / 4, transpose, v.data());
}
void WebGLRenderingContextBase::uniformMatrix3fv(const WebGLUniformLocation* location, GC3Dboolean transpose, Float32List&& v)
{
if (isContextLostOrPending() || !validateUniformMatrixParameters("uniformMatrix3fv", location, transpose, v, 9))
return;
m_context->uniformMatrix3fv(location->location(), v.length() / 9, transpose, v.data());
}
void WebGLRenderingContextBase::uniformMatrix4fv(const WebGLUniformLocation* location, GC3Dboolean transpose, Float32List&& v)
{
if (isContextLostOrPending() || !validateUniformMatrixParameters("uniformMatrix4fv", location, transpose, v, 16))
return;
m_context->uniformMatrix4fv(location->location(), v.length() / 16, transpose, v.data());
}
void WebGLRenderingContextBase::useProgram(WebGLProgram* program)
{
bool deleted;
if (!checkObjectToBeBound("useProgram", program, deleted))
return;
if (deleted)
program = 0;
if (program && !program->getLinkStatus()) {
synthesizeGLError(GraphicsContext3D::INVALID_OPERATION, "useProgram", "program not valid");
return;
}
if (m_currentProgram != program) {
if (m_currentProgram)
m_currentProgram->onDetached(graphicsContext3D());
m_currentProgram = program;
m_context->useProgram(objectOrZero(program));
if (program)
program->onAttached();
}
}
void WebGLRenderingContextBase::validateProgram(WebGLProgram* program)
{
if (isContextLostOrPending() || !validateWebGLObject("validateProgram", program))
return;
m_context->validateProgram(objectOrZero(program));
}
void WebGLRenderingContextBase::vertexAttrib1f(GC3Duint index, GC3Dfloat v0)
{
vertexAttribfImpl("vertexAttrib1f", index, 1, v0, 0.0f, 0.0f, 1.0f);
}
void WebGLRenderingContextBase::vertexAttrib2f(GC3Duint index, GC3Dfloat v0, GC3Dfloat v1)
{
vertexAttribfImpl("vertexAttrib2f", index, 2, v0, v1, 0.0f, 1.0f);
}
void WebGLRenderingContextBase::vertexAttrib3f(GC3Duint index, GC3Dfloat v0, GC3Dfloat v1, GC3Dfloat v2)
{
vertexAttribfImpl("vertexAttrib3f", index, 3, v0, v1, v2, 1.0f);
}
void WebGLRenderingContextBase::vertexAttrib4f(GC3Duint index, GC3Dfloat v0, GC3Dfloat v1, GC3Dfloat v2, GC3Dfloat v3)
{
vertexAttribfImpl("vertexAttrib4f", index, 4, v0, v1, v2, v3);
}
void WebGLRenderingContextBase::vertexAttrib1fv(GC3Duint index, Float32List&& v)
{
vertexAttribfvImpl("vertexAttrib1fv", index, WTFMove(v), 1);
}
void WebGLRenderingContextBase::vertexAttrib2fv(GC3Duint index, Float32List&& v)
{
vertexAttribfvImpl("vertexAttrib2fv", index, WTFMove(v), 2);
}
void WebGLRenderingContextBase::vertexAttrib3fv(GC3Duint index, Float32List&& v)
{
vertexAttribfvImpl("vertexAttrib3fv", index, WTFMove(v), 3);
}
void WebGLRenderingContextBase::vertexAttrib4fv(GC3Duint index, Float32List&& v)
{
vertexAttribfvImpl("vertexAttrib4fv", index, WTFMove(v), 4);
}
void WebGLRenderingContextBase::vertexAttribPointer(GC3Duint index, GC3Dint size, GC3Denum type, GC3Dboolean normalized, GC3Dsizei stride, long long offset)
{
if (isContextLostOrPending())
return;
switch (type) {
case GraphicsContext3D::BYTE:
case GraphicsContext3D::UNSIGNED_BYTE:
case GraphicsContext3D::SHORT:
case GraphicsContext3D::UNSIGNED_SHORT:
case GraphicsContext3D::FLOAT:
break;
default:
synthesizeGLError(GraphicsContext3D::INVALID_ENUM, "vertexAttribPointer", "invalid type");
return;
}
if (index >= m_maxVertexAttribs) {
synthesizeGLError(GraphicsContext3D::INVALID_VALUE, "vertexAttribPointer", "index out of range");
return;
}
if (size < 1 || size > 4) {
synthesizeGLError(GraphicsContext3D::INVALID_VALUE, "vertexAttribPointer", "bad size");
return;
}
if (stride < 0 || stride > 255) {
synthesizeGLError(GraphicsContext3D::INVALID_VALUE, "vertexAttribPointer", "bad stride");
return;
}
if (offset < 0 || offset > std::numeric_limits<int32_t>::max()) {
synthesizeGLError(GraphicsContext3D::INVALID_VALUE, "vertexAttribPointer", "bad offset");
return;
}
if (!m_boundArrayBuffer) {
synthesizeGLError(GraphicsContext3D::INVALID_OPERATION, "vertexAttribPointer", "no bound ARRAY_BUFFER");
return;
}
// Determine the number of elements the bound buffer can hold, given the offset, size, type and stride
auto typeSize = sizeInBytes(type);
if (!typeSize) {
synthesizeGLError(GraphicsContext3D::INVALID_ENUM, "vertexAttribPointer", "invalid type");
return;
}
if ((stride % typeSize) || (static_cast<GC3Dintptr>(offset) % typeSize)) {
synthesizeGLError(GraphicsContext3D::INVALID_OPERATION, "vertexAttribPointer", "stride or offset not valid for type");
return;
}
GC3Dsizei bytesPerElement = size * typeSize;
m_boundVertexArrayObject->setVertexAttribState(index, bytesPerElement, size, type, normalized, stride, static_cast<GC3Dintptr>(offset), *m_boundArrayBuffer);
m_context->vertexAttribPointer(index, size, type, normalized, stride, static_cast<GC3Dintptr>(offset));
}
void WebGLRenderingContextBase::viewport(GC3Dint x, GC3Dint y, GC3Dsizei width, GC3Dsizei height)
{
if (isContextLostOrPending())
return;
if (!validateSize("viewport", width, height))
return;
m_context->viewport(x, y, width, height);
}
void WebGLRenderingContextBase::forceLostContext(WebGLRenderingContextBase::LostContextMode mode)
{
if (isContextLostOrPending()) {
synthesizeGLError(GraphicsContext3D::INVALID_OPERATION, "loseContext", "context already lost");
return;
}
m_contextGroup->loseContextGroup(mode);
}
void WebGLRenderingContextBase::loseContextImpl(WebGLRenderingContextBase::LostContextMode mode)
{
if (isContextLost())
return;
m_contextLost = true;
m_contextLostMode = mode;
if (mode == RealLostContext) {
// Inform the embedder that a lost context was received. In response, the embedder might
// decide to take action such as asking the user for permission to use WebGL again.
auto* canvas = htmlCanvas();
if (canvas) {
if (RefPtr<Frame> frame = canvas->document().frame())
frame->loader().client().didLoseWebGLContext(m_context->getExtensions().getGraphicsResetStatusARB());
}
}
detachAndRemoveAllObjects();
// There is no direct way to clear errors from a GL implementation and
// looping until getError() becomes NO_ERROR might cause an infinite loop if
// the driver or context implementation had a bug. So, loop a reasonably
// large number of times to clear any existing errors.
for (int i = 0; i < 100; ++i) {
if (m_context->getError() == GraphicsContext3D::NO_ERROR)
break;
}
ConsoleDisplayPreference display = (mode == RealLostContext) ? DisplayInConsole: DontDisplayInConsole;
synthesizeGLError(GraphicsContext3D::CONTEXT_LOST_WEBGL, "loseContext", "context lost", display);
// Don't allow restoration unless the context lost event has both been
// dispatched and its default behavior prevented.
m_restoreAllowed = false;
// Always defer the dispatch of the context lost event, to implement
// the spec behavior of queueing a task.
m_dispatchContextLostEventTimer.startOneShot(0_s);
}
void WebGLRenderingContextBase::forceRestoreContext()
{
if (!isContextLostOrPending()) {
synthesizeGLError(GraphicsContext3D::INVALID_OPERATION, "restoreContext", "context not lost");
return;
}
if (!m_restoreAllowed) {
if (m_contextLostMode == SyntheticLostContext)
synthesizeGLError(GraphicsContext3D::INVALID_OPERATION, "restoreContext", "context restoration not allowed");
return;
}
if (!m_restoreTimer.isActive())
m_restoreTimer.startOneShot(0_s);
}
PlatformLayer* WebGLRenderingContextBase::platformLayer() const
{
return (!isContextLost() && !m_isPendingPolicyResolution) ? m_context->platformLayer() : 0;
}
void WebGLRenderingContextBase::removeSharedObject(WebGLSharedObject& object)
{
if (m_isPendingPolicyResolution)
return;
m_contextGroup->removeObject(object);
}
void WebGLRenderingContextBase::addSharedObject(WebGLSharedObject& object)
{
if (m_isPendingPolicyResolution)
return;
ASSERT(!isContextLost());
m_contextGroup->addObject(object);
}
void WebGLRenderingContextBase::removeContextObject(WebGLContextObject& object)
{
if (m_isPendingPolicyResolution)
return;
m_contextObjects.remove(&object);
}
void WebGLRenderingContextBase::addContextObject(WebGLContextObject& object)
{
if (m_isPendingPolicyResolution)
return;
ASSERT(!isContextLost());
m_contextObjects.add(&object);
}
void WebGLRenderingContextBase::detachAndRemoveAllObjects()
{
if (m_isPendingPolicyResolution)
return;
while (m_contextObjects.size() > 0) {
HashSet<WebGLContextObject*>::iterator it = m_contextObjects.begin();
(*it)->detachContext();
}
}
bool WebGLRenderingContextBase::hasPendingActivity() const
{
return false;
}
void WebGLRenderingContextBase::stop()
{
if (!isContextLost() && !m_isPendingPolicyResolution) {
forceLostContext(SyntheticLostContext);
destroyGraphicsContext3D();
}
}
const char* WebGLRenderingContextBase::activeDOMObjectName() const
{
return "WebGLRenderingContext";
}
bool WebGLRenderingContextBase::canSuspendForDocumentSuspension() const
{
// FIXME: We should try and do better here.
return false;
}
bool WebGLRenderingContextBase::getBooleanParameter(GC3Denum pname)
{
GC3Dboolean value = 0;
m_context->getBooleanv(pname, &value);
return value;
}
Vector<bool> WebGLRenderingContextBase::getBooleanArrayParameter(GC3Denum pname)
{
if (pname != GraphicsContext3D::COLOR_WRITEMASK) {
notImplemented();
return { };
}
GC3Dboolean value[4] = { 0 };
m_context->getBooleanv(pname, value);
Vector<bool> vector(4);
for (unsigned i = 0; i < 4; ++i)
vector[i] = value[i];
return vector;
}
float WebGLRenderingContextBase::getFloatParameter(GC3Denum pname)
{
GC3Dfloat value = 0;
m_context->getFloatv(pname, &value);
return value;
}
int WebGLRenderingContextBase::getIntParameter(GC3Denum pname)
{
GC3Dint value = 0;
m_context->getIntegerv(pname, &value);
return value;
}
unsigned WebGLRenderingContextBase::getUnsignedIntParameter(GC3Denum pname)
{
GC3Dint value = 0;
m_context->getIntegerv(pname, &value);
return value;
}
long long WebGLRenderingContextBase::getInt64Parameter(GC3Denum pname)
{
GC3Dint64 value = 0;
m_context->getInteger64v(pname, &value);
return value;
}
RefPtr<Float32Array> WebGLRenderingContextBase::getWebGLFloatArrayParameter(GC3Denum pname)
{
GC3Dfloat value[4] = {0};
m_context->getFloatv(pname, value);
unsigned length = 0;
switch (pname) {
case GraphicsContext3D::ALIASED_POINT_SIZE_RANGE:
case GraphicsContext3D::ALIASED_LINE_WIDTH_RANGE:
case GraphicsContext3D::DEPTH_RANGE:
length = 2;
break;
case GraphicsContext3D::BLEND_COLOR:
case GraphicsContext3D::COLOR_CLEAR_VALUE:
length = 4;
break;
default:
notImplemented();
}
return Float32Array::tryCreate(value, length);
}
RefPtr<Int32Array> WebGLRenderingContextBase::getWebGLIntArrayParameter(GC3Denum pname)
{
GC3Dint value[4] = {0};
m_context->getIntegerv(pname, value);
unsigned length = 0;
switch (pname) {
case GraphicsContext3D::MAX_VIEWPORT_DIMS:
length = 2;
break;
case GraphicsContext3D::SCISSOR_BOX:
case GraphicsContext3D::VIEWPORT:
length = 4;
break;
default:
notImplemented();
}
return Int32Array::tryCreate(value, length);
}
bool WebGLRenderingContextBase::checkTextureCompleteness(const char* functionName, bool prepareToDraw)
{
bool resetActiveUnit = false;
bool usesAtLeastOneBlackTexture = false;
WebGLTexture::TextureExtensionFlag extensions = textureExtensionFlags();
Vector<unsigned> noLongerUnrenderable;
for (unsigned badTexture : m_unrenderableTextureUnits) {
ASSERT(badTexture < m_textureUnits.size());
auto& textureUnit = m_textureUnits[badTexture];
bool needsToUseBlack2DTexture = textureUnit.texture2DBinding && textureUnit.texture2DBinding->needToUseBlackTexture(extensions);
bool needsToUseBlack3DTexture = textureUnit.textureCubeMapBinding && textureUnit.textureCubeMapBinding->needToUseBlackTexture(extensions);
if (!needsToUseBlack2DTexture && !needsToUseBlack3DTexture) {
noLongerUnrenderable.append(badTexture);
continue;
}
usesAtLeastOneBlackTexture = true;
if (badTexture != m_activeTextureUnit) {
m_context->activeTexture(badTexture + GraphicsContext3D::TEXTURE0);
resetActiveUnit = true;
} else if (resetActiveUnit) {
m_context->activeTexture(badTexture + GraphicsContext3D::TEXTURE0);
resetActiveUnit = false;
}
RefPtr<WebGLTexture> tex2D;
RefPtr<WebGLTexture> texCubeMap;
if (prepareToDraw) {
printToConsole(MessageLevel::Error, makeString("WebGL: ", functionName, ": texture bound to texture unit ", badTexture,
" is not renderable. It maybe non-power-of-2 and have incompatible texture filtering or is not 'texture complete',"
" or it is a float/half-float type with linear filtering and without the relevant float/half-float linear extension enabled."));
tex2D = m_blackTexture2D.get();
texCubeMap = m_blackTextureCubeMap.get();
} else {
tex2D = textureUnit.texture2DBinding.get();
texCubeMap = textureUnit.textureCubeMapBinding.get();
}
if (needsToUseBlack2DTexture)
m_context->bindTexture(GraphicsContext3D::TEXTURE_2D, objectOrZero(tex2D.get()));
if (needsToUseBlack3DTexture)
m_context->bindTexture(GraphicsContext3D::TEXTURE_CUBE_MAP, objectOrZero(texCubeMap.get()));
}
if (resetActiveUnit)
m_context->activeTexture(m_activeTextureUnit + GraphicsContext3D::TEXTURE0);
for (unsigned renderable : noLongerUnrenderable)
m_unrenderableTextureUnits.remove(renderable);
return usesAtLeastOneBlackTexture;
}
void WebGLRenderingContextBase::createFallbackBlackTextures1x1()
{
unsigned char black[] = {0, 0, 0, 255};
m_blackTexture2D = createTexture();
m_context->bindTexture(GraphicsContext3D::TEXTURE_2D, m_blackTexture2D->object());
m_context->texImage2D(GraphicsContext3D::TEXTURE_2D, 0, GraphicsContext3D::RGBA, 1, 1,
0, GraphicsContext3D::RGBA, GraphicsContext3D::UNSIGNED_BYTE, black);
m_context->bindTexture(GraphicsContext3D::TEXTURE_2D, 0);
m_blackTextureCubeMap = createTexture();
m_context->bindTexture(GraphicsContext3D::TEXTURE_CUBE_MAP, m_blackTextureCubeMap->object());
m_context->texImage2D(GraphicsContext3D::TEXTURE_CUBE_MAP_POSITIVE_X, 0, GraphicsContext3D::RGBA, 1, 1,
0, GraphicsContext3D::RGBA, GraphicsContext3D::UNSIGNED_BYTE, black);
m_context->texImage2D(GraphicsContext3D::TEXTURE_CUBE_MAP_NEGATIVE_X, 0, GraphicsContext3D::RGBA, 1, 1,
0, GraphicsContext3D::RGBA, GraphicsContext3D::UNSIGNED_BYTE, black);
m_context->texImage2D(GraphicsContext3D::TEXTURE_CUBE_MAP_POSITIVE_Y, 0, GraphicsContext3D::RGBA, 1, 1,
0, GraphicsContext3D::RGBA, GraphicsContext3D::UNSIGNED_BYTE, black);
m_context->texImage2D(GraphicsContext3D::TEXTURE_CUBE_MAP_NEGATIVE_Y, 0, GraphicsContext3D::RGBA, 1, 1,
0, GraphicsContext3D::RGBA, GraphicsContext3D::UNSIGNED_BYTE, black);
m_context->texImage2D(GraphicsContext3D::TEXTURE_CUBE_MAP_POSITIVE_Z, 0, GraphicsContext3D::RGBA, 1, 1,
0, GraphicsContext3D::RGBA, GraphicsContext3D::UNSIGNED_BYTE, black);
m_context->texImage2D(GraphicsContext3D::TEXTURE_CUBE_MAP_NEGATIVE_Z, 0, GraphicsContext3D::RGBA, 1, 1,
0, GraphicsContext3D::RGBA, GraphicsContext3D::UNSIGNED_BYTE, black);
m_context->bindTexture(GraphicsContext3D::TEXTURE_CUBE_MAP, 0);
}
bool WebGLRenderingContextBase::isTexInternalFormatColorBufferCombinationValid(GC3Denum texInternalFormat,
GC3Denum colorBufferFormat)
{
unsigned need = GraphicsContext3D::getChannelBitsByFormat(texInternalFormat);
unsigned have = GraphicsContext3D::getChannelBitsByFormat(colorBufferFormat);
return (need & have) == need;
}
GC3Denum WebGLRenderingContextBase::getBoundFramebufferColorFormat()
{
if (m_framebufferBinding && m_framebufferBinding->object())
return m_framebufferBinding->getColorBufferFormat();
if (m_attributes.alpha)
return GraphicsContext3D::RGBA;
return GraphicsContext3D::RGB;
}
int WebGLRenderingContextBase::getBoundFramebufferWidth()
{
if (m_framebufferBinding && m_framebufferBinding->object())
return m_framebufferBinding->getColorBufferWidth();
return m_context->getInternalFramebufferSize().width();
}
int WebGLRenderingContextBase::getBoundFramebufferHeight()
{
if (m_framebufferBinding && m_framebufferBinding->object())
return m_framebufferBinding->getColorBufferHeight();
return m_context->getInternalFramebufferSize().height();
}
RefPtr<WebGLTexture> WebGLRenderingContextBase::validateTextureBinding(const char* functionName, GC3Denum target, bool useSixEnumsForCubeMap)
{
RefPtr<WebGLTexture> texture;
switch (target) {
case GraphicsContext3D::TEXTURE_2D:
texture = m_textureUnits[m_activeTextureUnit].texture2DBinding;
break;
case GraphicsContext3D::TEXTURE_CUBE_MAP_POSITIVE_X:
case GraphicsContext3D::TEXTURE_CUBE_MAP_NEGATIVE_X:
case GraphicsContext3D::TEXTURE_CUBE_MAP_POSITIVE_Y:
case GraphicsContext3D::TEXTURE_CUBE_MAP_NEGATIVE_Y:
case GraphicsContext3D::TEXTURE_CUBE_MAP_POSITIVE_Z:
case GraphicsContext3D::TEXTURE_CUBE_MAP_NEGATIVE_Z:
if (!useSixEnumsForCubeMap) {
synthesizeGLError(GraphicsContext3D::INVALID_ENUM, functionName, "invalid texture target");
return nullptr;
}
texture = m_textureUnits[m_activeTextureUnit].textureCubeMapBinding;
break;
case GraphicsContext3D::TEXTURE_CUBE_MAP:
if (useSixEnumsForCubeMap) {
synthesizeGLError(GraphicsContext3D::INVALID_ENUM, functionName, "invalid texture target");
return nullptr;
}
texture = m_textureUnits[m_activeTextureUnit].textureCubeMapBinding;
break;
default:
synthesizeGLError(GraphicsContext3D::INVALID_ENUM, functionName, "invalid texture target");
return nullptr;
}
if (texture && texture->needToUseBlackTexture(textureExtensionFlags()))
m_unrenderableTextureUnits.add(m_activeTextureUnit);
if (!texture)
synthesizeGLError(GraphicsContext3D::INVALID_OPERATION, functionName, "no texture");
return texture;
}
bool WebGLRenderingContextBase::validateLocationLength(const char* functionName, const String& string)
{
const unsigned maxWebGLLocationLength = 256;
if (string.length() > maxWebGLLocationLength) {
synthesizeGLError(GraphicsContext3D::INVALID_VALUE, functionName, "location length > 256");
return false;
}
return true;
}
bool WebGLRenderingContextBase::validateSize(const char* functionName, GC3Dint x, GC3Dint y)
{
if (x < 0 || y < 0) {
synthesizeGLError(GraphicsContext3D::INVALID_VALUE, functionName, "size < 0");
return false;
}
return true;
}
bool WebGLRenderingContextBase::validateString(const char* functionName, const String& string)
{
for (size_t i = 0; i < string.length(); ++i) {
if (!validateCharacter(string[i])) {
synthesizeGLError(GraphicsContext3D::INVALID_VALUE, functionName, "string not ASCII");
return false;
}
}
return true;
}
bool WebGLRenderingContextBase::validateTexFuncLevel(const char* functionName, GC3Denum target, GC3Dint level)
{
if (level < 0) {
synthesizeGLError(GraphicsContext3D::INVALID_VALUE, functionName, "level < 0");
return false;
}
switch (target) {
case GraphicsContext3D::TEXTURE_2D:
if (level >= m_maxTextureLevel) {
synthesizeGLError(GraphicsContext3D::INVALID_VALUE, functionName, "level out of range");
return false;
}
break;
case GraphicsContext3D::TEXTURE_CUBE_MAP_POSITIVE_X:
case GraphicsContext3D::TEXTURE_CUBE_MAP_NEGATIVE_X:
case GraphicsContext3D::TEXTURE_CUBE_MAP_POSITIVE_Y:
case GraphicsContext3D::TEXTURE_CUBE_MAP_NEGATIVE_Y:
case GraphicsContext3D::TEXTURE_CUBE_MAP_POSITIVE_Z:
case GraphicsContext3D::TEXTURE_CUBE_MAP_NEGATIVE_Z:
if (level >= m_maxCubeMapTextureLevel) {
synthesizeGLError(GraphicsContext3D::INVALID_VALUE, functionName, "level out of range");
return false;
}
break;
}
// This function only checks if level is legal, so we return true and don't
// generate INVALID_ENUM if target is illegal.
return true;
}
bool WebGLRenderingContextBase::validateCompressedTexFormat(GC3Denum format)
{
return m_compressedTextureFormats.contains(format);
}
struct BlockParameters {
const int width;
const int height;
const int size;
};
static inline unsigned calculateBytesForASTC(GC3Dsizei width, GC3Dsizei height, const BlockParameters& parameters)
{
return ((width + parameters.width - 1) / parameters.width) * ((height + parameters.height - 1) / parameters.height) * parameters.size;
}
bool WebGLRenderingContextBase::validateCompressedTexFuncData(const char* functionName, GC3Dsizei width, GC3Dsizei height, GC3Denum format, ArrayBufferView& pixels)
{
if (width < 0 || height < 0) {
synthesizeGLError(GraphicsContext3D::INVALID_VALUE, functionName, "width or height < 0");
return false;
}
unsigned bytesRequired = 0;
// Block parameters for ASTC formats
const int kASTCBlockSize = 16;
static const BlockParameters ASTCParameters[] {
BlockParameters { 4, 4, kASTCBlockSize },
BlockParameters { 5, 4, kASTCBlockSize },
BlockParameters { 5, 5, kASTCBlockSize },
BlockParameters { 6, 5, kASTCBlockSize },
BlockParameters { 6, 6, kASTCBlockSize },
BlockParameters { 8, 5, kASTCBlockSize },
BlockParameters { 8, 6, kASTCBlockSize },
BlockParameters { 8, 8, kASTCBlockSize },
BlockParameters { 10, 5, kASTCBlockSize },
BlockParameters { 10, 6, kASTCBlockSize },
BlockParameters { 10, 8, kASTCBlockSize },
BlockParameters { 10, 10, kASTCBlockSize },
BlockParameters { 12, 10, kASTCBlockSize },
BlockParameters { 12, 12, kASTCBlockSize }
};
const GC3Denum ASTCEnumStartRGBA = Extensions3D::COMPRESSED_RGBA_ASTC_4x4_KHR;
const GC3Denum ASTCEnumStartSRGB8 = Extensions3D::COMPRESSED_SRGB8_ALPHA8_ASTC_4x4_KHR;
switch (format) {
case Extensions3D::COMPRESSED_RGB_S3TC_DXT1_EXT:
case Extensions3D::COMPRESSED_RGBA_S3TC_DXT1_EXT:
case Extensions3D::COMPRESSED_ATC_RGB_AMD:
{
const int kBlockSize = 8;
const int kBlockWidth = 4;
const int kBlockHeight = 4;
int numBlocksAcross = (width + kBlockWidth - 1) / kBlockWidth;
int numBlocksDown = (height + kBlockHeight - 1) / kBlockHeight;
bytesRequired = numBlocksAcross * numBlocksDown * kBlockSize;
}
break;
case Extensions3D::COMPRESSED_RGBA_S3TC_DXT3_EXT:
case Extensions3D::COMPRESSED_RGBA_S3TC_DXT5_EXT:
case Extensions3D::COMPRESSED_ATC_RGBA_EXPLICIT_ALPHA_AMD:
case Extensions3D::COMPRESSED_ATC_RGBA_INTERPOLATED_ALPHA_AMD:
{
const int kBlockSize = 16;
const int kBlockWidth = 4;
const int kBlockHeight = 4;
int numBlocksAcross = (width + kBlockWidth - 1) / kBlockWidth;
int numBlocksDown = (height + kBlockHeight - 1) / kBlockHeight;
bytesRequired = numBlocksAcross * numBlocksDown * kBlockSize;
}
break;
case Extensions3D::COMPRESSED_RGB_PVRTC_4BPPV1_IMG:
case Extensions3D::COMPRESSED_RGBA_PVRTC_4BPPV1_IMG:
{
const int kBlockSize = 8;
const int kBlockWidth = 8;
const int kBlockHeight = 8;
bytesRequired = (std::max(width, kBlockWidth) * std::max(height, kBlockHeight) * 4 + 7) / kBlockSize;
}
break;
case Extensions3D::COMPRESSED_RGB_PVRTC_2BPPV1_IMG:
case Extensions3D::COMPRESSED_RGBA_PVRTC_2BPPV1_IMG:
{
const int kBlockSize = 8;
const int kBlockWidth = 16;
const int kBlockHeight = 8;
bytesRequired = (std::max(width, kBlockWidth) * std::max(height, kBlockHeight) * 2 + 7) / kBlockSize;
}
break;
case Extensions3D::COMPRESSED_RGBA_ASTC_4x4_KHR:
case Extensions3D::COMPRESSED_RGBA_ASTC_5x4_KHR:
case Extensions3D::COMPRESSED_RGBA_ASTC_5x5_KHR:
case Extensions3D::COMPRESSED_RGBA_ASTC_6x5_KHR:
case Extensions3D::COMPRESSED_RGBA_ASTC_6x6_KHR:
case Extensions3D::COMPRESSED_RGBA_ASTC_8x5_KHR:
case Extensions3D::COMPRESSED_RGBA_ASTC_8x6_KHR:
case Extensions3D::COMPRESSED_RGBA_ASTC_8x8_KHR:
case Extensions3D::COMPRESSED_RGBA_ASTC_10x5_KHR:
case Extensions3D::COMPRESSED_RGBA_ASTC_10x6_KHR:
case Extensions3D::COMPRESSED_RGBA_ASTC_10x8_KHR:
case Extensions3D::COMPRESSED_RGBA_ASTC_10x10_KHR:
case Extensions3D::COMPRESSED_RGBA_ASTC_12x10_KHR:
case Extensions3D::COMPRESSED_RGBA_ASTC_12x12_KHR:
bytesRequired = calculateBytesForASTC(width, height, ASTCParameters[format - ASTCEnumStartRGBA]);
break;
case Extensions3D::COMPRESSED_SRGB8_ALPHA8_ASTC_4x4_KHR:
case Extensions3D::COMPRESSED_SRGB8_ALPHA8_ASTC_5x4_KHR:
case Extensions3D::COMPRESSED_SRGB8_ALPHA8_ASTC_5x5_KHR:
case Extensions3D::COMPRESSED_SRGB8_ALPHA8_ASTC_6x5_KHR:
case Extensions3D::COMPRESSED_SRGB8_ALPHA8_ASTC_6x6_KHR:
case Extensions3D::COMPRESSED_SRGB8_ALPHA8_ASTC_8x5_KHR:
case Extensions3D::COMPRESSED_SRGB8_ALPHA8_ASTC_8x6_KHR:
case Extensions3D::COMPRESSED_SRGB8_ALPHA8_ASTC_8x8_KHR:
case Extensions3D::COMPRESSED_SRGB8_ALPHA8_ASTC_10x5_KHR:
case Extensions3D::COMPRESSED_SRGB8_ALPHA8_ASTC_10x6_KHR:
case Extensions3D::COMPRESSED_SRGB8_ALPHA8_ASTC_10x8_KHR:
case Extensions3D::COMPRESSED_SRGB8_ALPHA8_ASTC_10x10_KHR:
case Extensions3D::COMPRESSED_SRGB8_ALPHA8_ASTC_12x10_KHR:
case Extensions3D::COMPRESSED_SRGB8_ALPHA8_ASTC_12x12_KHR:
bytesRequired = calculateBytesForASTC(width, height, ASTCParameters[format - ASTCEnumStartSRGB8]);
break;
default:
synthesizeGLError(GraphicsContext3D::INVALID_ENUM, functionName, "invalid format");
return false;
}
if (pixels.byteLength() != bytesRequired) {
synthesizeGLError(GraphicsContext3D::INVALID_VALUE, functionName, "length of ArrayBufferView is not correct for dimensions");
return false;
}
return true;
}
bool WebGLRenderingContextBase::validateCompressedTexDimensions(const char* functionName, GC3Denum target, GC3Dint level, GC3Dsizei width, GC3Dsizei height, GC3Denum format)
{
switch (format) {
case Extensions3D::COMPRESSED_RGB_S3TC_DXT1_EXT:
case Extensions3D::COMPRESSED_RGBA_S3TC_DXT1_EXT:
case Extensions3D::COMPRESSED_RGBA_S3TC_DXT3_EXT:
case Extensions3D::COMPRESSED_RGBA_S3TC_DXT5_EXT: {
const GC3Dsizei kBlockWidth = 4;
const GC3Dsizei kBlockHeight = 4;
const GC3Dint maxTextureSize = target ? m_maxTextureSize : m_maxCubeMapTextureSize;
const GC3Dsizei maxCompressedDimension = maxTextureSize >> level;
bool widthValid = (level && width == 1) || (level && width == 2) || (!(width % kBlockWidth) && width <= maxCompressedDimension);
bool heightValid = (level && height == 1) || (level && height == 2) || (!(height % kBlockHeight) && height <= maxCompressedDimension);
if (!widthValid || !heightValid) {
synthesizeGLError(GraphicsContext3D::INVALID_OPERATION, functionName, "width or height invalid for level");
return false;
}
return true;
}
case Extensions3D::COMPRESSED_RGB_PVRTC_4BPPV1_IMG:
case Extensions3D::COMPRESSED_RGB_PVRTC_2BPPV1_IMG:
case Extensions3D::COMPRESSED_RGBA_PVRTC_4BPPV1_IMG:
case Extensions3D::COMPRESSED_RGBA_PVRTC_2BPPV1_IMG:
// Height and width must be powers of 2.
if ((width & (width - 1)) || (height & (height - 1))) {
synthesizeGLError(GraphicsContext3D::INVALID_OPERATION, functionName, "width or height invalid for level");
return false;
}
return true;
case Extensions3D::COMPRESSED_RGBA_ASTC_4x4_KHR:
case Extensions3D::COMPRESSED_RGBA_ASTC_5x4_KHR:
case Extensions3D::COMPRESSED_RGBA_ASTC_5x5_KHR:
case Extensions3D::COMPRESSED_RGBA_ASTC_6x5_KHR:
case Extensions3D::COMPRESSED_RGBA_ASTC_6x6_KHR:
case Extensions3D::COMPRESSED_RGBA_ASTC_8x5_KHR:
case Extensions3D::COMPRESSED_RGBA_ASTC_8x6_KHR:
case Extensions3D::COMPRESSED_RGBA_ASTC_8x8_KHR:
case Extensions3D::COMPRESSED_RGBA_ASTC_10x5_KHR:
case Extensions3D::COMPRESSED_RGBA_ASTC_10x6_KHR:
case Extensions3D::COMPRESSED_RGBA_ASTC_10x8_KHR:
case Extensions3D::COMPRESSED_RGBA_ASTC_10x10_KHR:
case Extensions3D::COMPRESSED_RGBA_ASTC_12x10_KHR:
case Extensions3D::COMPRESSED_RGBA_ASTC_12x12_KHR:
case Extensions3D::COMPRESSED_SRGB8_ALPHA8_ASTC_4x4_KHR:
case Extensions3D::COMPRESSED_SRGB8_ALPHA8_ASTC_5x4_KHR:
case Extensions3D::COMPRESSED_SRGB8_ALPHA8_ASTC_5x5_KHR:
case Extensions3D::COMPRESSED_SRGB8_ALPHA8_ASTC_6x5_KHR:
case Extensions3D::COMPRESSED_SRGB8_ALPHA8_ASTC_6x6_KHR:
case Extensions3D::COMPRESSED_SRGB8_ALPHA8_ASTC_8x5_KHR:
case Extensions3D::COMPRESSED_SRGB8_ALPHA8_ASTC_8x6_KHR:
case Extensions3D::COMPRESSED_SRGB8_ALPHA8_ASTC_8x8_KHR:
case Extensions3D::COMPRESSED_SRGB8_ALPHA8_ASTC_10x5_KHR:
case Extensions3D::COMPRESSED_SRGB8_ALPHA8_ASTC_10x6_KHR:
case Extensions3D::COMPRESSED_SRGB8_ALPHA8_ASTC_10x8_KHR:
case Extensions3D::COMPRESSED_SRGB8_ALPHA8_ASTC_10x10_KHR:
case Extensions3D::COMPRESSED_SRGB8_ALPHA8_ASTC_12x10_KHR:
case Extensions3D::COMPRESSED_SRGB8_ALPHA8_ASTC_12x12_KHR:
// No height and width restrictions on ASTC.
return true;
default:
return false;
}
}
bool WebGLRenderingContextBase::validateCompressedTexSubDimensions(const char* functionName, GC3Denum target, GC3Dint level, GC3Dint xoffset, GC3Dint yoffset,
GC3Dsizei width, GC3Dsizei height, GC3Denum format, WebGLTexture* tex)
{
if (xoffset < 0 || yoffset < 0) {
synthesizeGLError(GraphicsContext3D::INVALID_VALUE, functionName, "xoffset or yoffset < 0");
return false;
}
switch (format) {
case Extensions3D::COMPRESSED_RGB_S3TC_DXT1_EXT:
case Extensions3D::COMPRESSED_RGBA_S3TC_DXT1_EXT:
case Extensions3D::COMPRESSED_RGBA_S3TC_DXT3_EXT:
case Extensions3D::COMPRESSED_RGBA_S3TC_DXT5_EXT: {
const int kBlockWidth = 4;
const int kBlockHeight = 4;
if ((xoffset % kBlockWidth) || (yoffset % kBlockHeight)) {
synthesizeGLError(GraphicsContext3D::INVALID_OPERATION, functionName, "xoffset or yoffset not multiple of 4");
return false;
}
if (width - xoffset > tex->getWidth(target, level)
|| height - yoffset > tex->getHeight(target, level)) {
synthesizeGLError(GraphicsContext3D::INVALID_OPERATION, functionName, "dimensions out of range");
return false;
}
return validateCompressedTexDimensions(functionName, target, level, width, height, format);
}
case Extensions3D::COMPRESSED_RGB_PVRTC_4BPPV1_IMG:
case Extensions3D::COMPRESSED_RGB_PVRTC_2BPPV1_IMG:
case Extensions3D::COMPRESSED_RGBA_PVRTC_4BPPV1_IMG:
case Extensions3D::COMPRESSED_RGBA_PVRTC_2BPPV1_IMG: {
if (xoffset || yoffset) {
synthesizeGLError(GraphicsContext3D::INVALID_OPERATION, functionName, "xoffset and yoffset must be zero");
return false;
}
if (width != tex->getWidth(target, level)
|| height != tex->getHeight(target, level)) {
synthesizeGLError(GraphicsContext3D::INVALID_OPERATION, functionName, "dimensions must match existing level");
return false;
}
return validateCompressedTexDimensions(functionName, target, level, width, height, format);
}
default:
return false;
}
}
bool WebGLRenderingContextBase::validateDrawMode(const char* functionName, GC3Denum mode)
{
switch (mode) {
case GraphicsContext3D::POINTS:
case GraphicsContext3D::LINE_STRIP:
case GraphicsContext3D::LINE_LOOP:
case GraphicsContext3D::LINES:
case GraphicsContext3D::TRIANGLE_STRIP:
case GraphicsContext3D::TRIANGLE_FAN:
case GraphicsContext3D::TRIANGLES:
return true;
default:
synthesizeGLError(GraphicsContext3D::INVALID_ENUM, functionName, "invalid draw mode");
return false;
}
}
bool WebGLRenderingContextBase::validateStencilSettings(const char* functionName)
{
if (m_stencilMask != m_stencilMaskBack || m_stencilFuncRef != m_stencilFuncRefBack || m_stencilFuncMask != m_stencilFuncMaskBack) {
synthesizeGLError(GraphicsContext3D::INVALID_OPERATION, functionName, "front and back stencils settings do not match");
return false;
}
return true;
}
bool WebGLRenderingContextBase::validateStencilFunc(const char* functionName, GC3Denum func)
{
switch (func) {
case GraphicsContext3D::NEVER:
case GraphicsContext3D::LESS:
case GraphicsContext3D::LEQUAL:
case GraphicsContext3D::GREATER:
case GraphicsContext3D::GEQUAL:
case GraphicsContext3D::EQUAL:
case GraphicsContext3D::NOTEQUAL:
case GraphicsContext3D::ALWAYS:
return true;
default:
synthesizeGLError(GraphicsContext3D::INVALID_ENUM, functionName, "invalid function");
return false;
}
}
void WebGLRenderingContextBase::printToConsole(MessageLevel level, const String& message)
{
if (!m_synthesizedErrorsToConsole || !m_numGLErrorsToConsoleAllowed)
return;
std::unique_ptr<Inspector::ConsoleMessage> consoleMessage;
// Error messages can occur during function calls, so show stack traces for them.
if (level == MessageLevel::Error) {
Ref<Inspector::ScriptCallStack> stackTrace = Inspector::createScriptCallStack(JSExecState::currentState());
consoleMessage = std::make_unique<Inspector::ConsoleMessage>(MessageSource::Rendering, MessageType::Log, level, message, WTFMove(stackTrace));
} else
consoleMessage = std::make_unique<Inspector::ConsoleMessage>(MessageSource::Rendering, MessageType::Log, level, message);
auto* canvas = htmlCanvas();
if (canvas)
canvas->document().addConsoleMessage(WTFMove(consoleMessage));
--m_numGLErrorsToConsoleAllowed;
if (!m_numGLErrorsToConsoleAllowed)
printToConsole(MessageLevel::Warning, "WebGL: too many errors, no more errors will be reported to the console for this context.");
}
bool WebGLRenderingContextBase::validateBlendFuncFactors(const char* functionName, GC3Denum src, GC3Denum dst)
{
if (((src == GraphicsContext3D::CONSTANT_COLOR || src == GraphicsContext3D::ONE_MINUS_CONSTANT_COLOR)
&& (dst == GraphicsContext3D::CONSTANT_ALPHA || dst == GraphicsContext3D::ONE_MINUS_CONSTANT_ALPHA))
|| ((dst == GraphicsContext3D::CONSTANT_COLOR || dst == GraphicsContext3D::ONE_MINUS_CONSTANT_COLOR)
&& (src == GraphicsContext3D::CONSTANT_ALPHA || src == GraphicsContext3D::ONE_MINUS_CONSTANT_ALPHA))) {
synthesizeGLError(GraphicsContext3D::INVALID_OPERATION, functionName, "incompatible src and dst");
return false;
}
return true;
}
bool WebGLRenderingContextBase::validateUniformParameters(const char* functionName, const WebGLUniformLocation* location, const Float32List& v, GC3Dsizei requiredMinSize)
{
return validateUniformMatrixParameters(functionName, location, false, v.data(), v.length(), requiredMinSize);
}
bool WebGLRenderingContextBase::validateUniformParameters(const char* functionName, const WebGLUniformLocation* location, const Int32List& v, GC3Dsizei requiredMinSize)
{
return validateUniformMatrixParameters(functionName, location, false, v.data(), v.length(), requiredMinSize);
}
bool WebGLRenderingContextBase::validateUniformParameters(const char* functionName, const WebGLUniformLocation* location, void* v, GC3Dsizei size, GC3Dsizei requiredMinSize)
{
return validateUniformMatrixParameters(functionName, location, false, v, size, requiredMinSize);
}
bool WebGLRenderingContextBase::validateUniformMatrixParameters(const char* functionName, const WebGLUniformLocation* location, GC3Dboolean transpose, const Float32List& v, GC3Dsizei requiredMinSize)
{
return validateUniformMatrixParameters(functionName, location, transpose, v.data(), v.length(), requiredMinSize);
}
bool WebGLRenderingContextBase::validateUniformMatrixParameters(const char* functionName, const WebGLUniformLocation* location, GC3Dboolean transpose, const void* v, GC3Dsizei size, GC3Dsizei requiredMinSize)
{
if (!location)
return false;
if (location->program() != m_currentProgram) {
synthesizeGLError(GraphicsContext3D::INVALID_OPERATION, functionName, "location is not from current program");
return false;
}
if (!v) {
synthesizeGLError(GraphicsContext3D::INVALID_VALUE, functionName, "no array");
return false;
}
if (transpose) {
synthesizeGLError(GraphicsContext3D::INVALID_VALUE, functionName, "transpose not FALSE");
return false;
}
if (size < requiredMinSize || (size % requiredMinSize)) {
synthesizeGLError(GraphicsContext3D::INVALID_VALUE, functionName, "invalid size");
return false;
}
return true;
}
WebGLBuffer* WebGLRenderingContextBase::validateBufferDataParameters(const char* functionName, GC3Denum target, GC3Denum usage)
{
Optional<WebGLBuffer*> buffer;
switch (target) {
case GraphicsContext3D::ELEMENT_ARRAY_BUFFER:
buffer = m_boundVertexArrayObject->getElementArrayBuffer();
break;
case GraphicsContext3D::ARRAY_BUFFER:
buffer = m_boundArrayBuffer.get();
break;
default:
#if ENABLE(WEBGL2)
if (isWebGL2()) {
switch (target) {
case GraphicsContext3D::COPY_READ_BUFFER:
buffer = m_boundCopyReadBuffer.get();
break;
case GraphicsContext3D::COPY_WRITE_BUFFER:
buffer = m_boundCopyWriteBuffer.get();
break;
case GraphicsContext3D::PIXEL_PACK_BUFFER:
buffer = m_boundPixelPackBuffer.get();
break;
case GraphicsContext3D::PIXEL_UNPACK_BUFFER:
buffer = m_boundPixelUnpackBuffer.get();
break;
case GraphicsContext3D::TRANSFORM_FEEDBACK_BUFFER:
buffer = m_boundTransformFeedbackBuffer.get();
break;
case GraphicsContext3D::UNIFORM_BUFFER:
buffer = m_boundUniformBuffer.get();
break;
}
if (buffer)
break;
}
#endif
synthesizeGLError(GraphicsContext3D::INVALID_ENUM, functionName, "invalid target");
return nullptr;
}
if (!buffer || !buffer.value()) {
synthesizeGLError(GraphicsContext3D::INVALID_OPERATION, functionName, "no buffer");
return nullptr;
}
switch (usage) {
case GraphicsContext3D::STREAM_DRAW:
case GraphicsContext3D::STATIC_DRAW:
case GraphicsContext3D::DYNAMIC_DRAW:
return buffer.value();
}
synthesizeGLError(GraphicsContext3D::INVALID_ENUM, functionName, "invalid usage");
return nullptr;
}
ExceptionOr<bool> WebGLRenderingContextBase::validateHTMLImageElement(const char* functionName, HTMLImageElement* image)
{
if (!image || !image->cachedImage()) {
synthesizeGLError(GraphicsContext3D::INVALID_VALUE, functionName, "no image");
return false;
}
const URL& url = image->cachedImage()->response().url();
if (url.isNull() || url.isEmpty() || !url.isValid()) {
synthesizeGLError(GraphicsContext3D::INVALID_VALUE, functionName, "invalid image");
return false;
}
if (wouldTaintOrigin(image))
return Exception { SecurityError };
return true;
}
ExceptionOr<bool> WebGLRenderingContextBase::validateHTMLCanvasElement(const char* functionName, HTMLCanvasElement* canvas)
{
if (!canvas || !canvas->buffer()) {
synthesizeGLError(GraphicsContext3D::INVALID_VALUE, functionName, "no canvas");
return false;
}
if (wouldTaintOrigin(canvas))
return Exception { SecurityError };
return true;
}
#if ENABLE(VIDEO)
ExceptionOr<bool> WebGLRenderingContextBase::validateHTMLVideoElement(const char* functionName, HTMLVideoElement* video)
{
if (!video || !video->videoWidth() || !video->videoHeight()) {
synthesizeGLError(GraphicsContext3D::INVALID_VALUE, functionName, "no video");
return false;
}
if (wouldTaintOrigin(video))
return Exception { SecurityError };
return true;
}
#endif
void WebGLRenderingContextBase::vertexAttribfImpl(const char* functionName, GC3Duint index, GC3Dsizei expectedSize, GC3Dfloat v0, GC3Dfloat v1, GC3Dfloat v2, GC3Dfloat v3)
{
if (isContextLostOrPending())
return;
if (index >= m_maxVertexAttribs) {
synthesizeGLError(GraphicsContext3D::INVALID_VALUE, functionName, "index out of range");
return;
}
// In GL, we skip setting vertexAttrib0 values.
if (index || isGLES2Compliant()) {
switch (expectedSize) {
case 1:
m_context->vertexAttrib1f(index, v0);
break;
case 2:
m_context->vertexAttrib2f(index, v0, v1);
break;
case 3:
m_context->vertexAttrib3f(index, v0, v1, v2);
break;
case 4:
m_context->vertexAttrib4f(index, v0, v1, v2, v3);
break;
}
}
VertexAttribValue& attribValue = m_vertexAttribValue[index];
attribValue.value[0] = v0;
attribValue.value[1] = v1;
attribValue.value[2] = v2;
attribValue.value[3] = v3;
}
void WebGLRenderingContextBase::vertexAttribfvImpl(const char* functionName, GC3Duint index, Float32List&& list, GC3Dsizei expectedSize)
{
if (isContextLostOrPending())
return;
auto data = list.data();
if (!data) {
synthesizeGLError(GraphicsContext3D::INVALID_VALUE, functionName, "no array");
return;
}
int size = list.length();
if (size < expectedSize) {
synthesizeGLError(GraphicsContext3D::INVALID_VALUE, functionName, "invalid size");
return;
}
if (index >= m_maxVertexAttribs) {
synthesizeGLError(GraphicsContext3D::INVALID_VALUE, functionName, "index out of range");
return;
}
// In GL, we skip setting vertexAttrib0 values.
if (index || isGLES2Compliant()) {
switch (expectedSize) {
case 1:
m_context->vertexAttrib1fv(index, data);
break;
case 2:
m_context->vertexAttrib2fv(index, data);
break;
case 3:
m_context->vertexAttrib3fv(index, data);
break;
case 4:
m_context->vertexAttrib4fv(index, data);
break;
}
}
VertexAttribValue& attribValue = m_vertexAttribValue[index];
attribValue.initValue();
for (int ii = 0; ii < expectedSize; ++ii)
attribValue.value[ii] = data[ii];
}
void WebGLRenderingContextBase::initVertexAttrib0()
{
WebGLVertexArrayObjectBase::VertexAttribState& state = m_boundVertexArrayObject->getVertexAttribState(0);
m_vertexAttrib0Buffer = createBuffer();
m_context->bindBuffer(GraphicsContext3D::ARRAY_BUFFER, m_vertexAttrib0Buffer->object());
m_context->bufferData(GraphicsContext3D::ARRAY_BUFFER, 0, GraphicsContext3D::DYNAMIC_DRAW);
m_context->vertexAttribPointer(0, 4, GraphicsContext3D::FLOAT, false, 0, 0);
state.bufferBinding = m_vertexAttrib0Buffer;
m_context->bindBuffer(GraphicsContext3D::ARRAY_BUFFER, 0);
m_context->enableVertexAttribArray(0);
m_vertexAttrib0BufferSize = 0;
m_vertexAttrib0BufferValue[0] = 0.0f;
m_vertexAttrib0BufferValue[1] = 0.0f;
m_vertexAttrib0BufferValue[2] = 0.0f;
m_vertexAttrib0BufferValue[3] = 1.0f;
m_forceAttrib0BufferRefill = false;
m_vertexAttrib0UsedBefore = false;
}
bool WebGLRenderingContextBase::validateSimulatedVertexAttrib0(GC3Duint numVertex)
{
if (!m_currentProgram)
return true;
bool usingVertexAttrib0 = m_currentProgram->isUsingVertexAttrib0();
if (!usingVertexAttrib0)
return true;
auto& state = m_boundVertexArrayObject->getVertexAttribState(0);
if (state.enabled)
return true;
auto bufferSize = checkedAddAndMultiply<GC3Duint>(numVertex, 1, 4);
if (!bufferSize)
return false;
Checked<GC3Dsizeiptr, RecordOverflow> bufferDataSize(bufferSize.value());
bufferDataSize *= Checked<GC3Dsizeiptr>(sizeof(GC3Dfloat));
return !bufferDataSize.hasOverflowed() && bufferDataSize.unsafeGet() > 0;
}
Optional<bool> WebGLRenderingContextBase::simulateVertexAttrib0(GC3Duint numVertex)
{
if (!m_currentProgram)
return false;
bool usingVertexAttrib0 = m_currentProgram->isUsingVertexAttrib0();
if (usingVertexAttrib0)
m_vertexAttrib0UsedBefore = true;
auto& state = m_boundVertexArrayObject->getVertexAttribState(0);
if (state.enabled && usingVertexAttrib0)
return false;
if (!usingVertexAttrib0 && !m_vertexAttrib0UsedBefore)
return false;
m_vertexAttrib0UsedBefore = true;
m_context->bindBuffer(GraphicsContext3D::ARRAY_BUFFER, m_vertexAttrib0Buffer->object());
// We know bufferSize and bufferDataSize won't overflow or go negative, thanks to validateSimulatedVertexAttrib0
GC3Duint bufferSize = (numVertex + 1) * 4;
GC3Dsizeiptr bufferDataSize = bufferSize * sizeof(GC3Dfloat);
if (bufferDataSize > m_vertexAttrib0BufferSize) {
m_context->moveErrorsToSyntheticErrorList();
m_context->bufferData(GraphicsContext3D::ARRAY_BUFFER, bufferDataSize, 0, GraphicsContext3D::DYNAMIC_DRAW);
if (m_context->getError() != GraphicsContext3D::NO_ERROR) {
// We were unable to create a buffer.
m_vertexAttrib0UsedBefore = false;
m_vertexAttrib0BufferSize = 0;
m_forceAttrib0BufferRefill = true;
return WTF::nullopt;
}
m_vertexAttrib0BufferSize = bufferDataSize;
m_forceAttrib0BufferRefill = true;
}
auto& attribValue = m_vertexAttribValue[0];
if (usingVertexAttrib0
&& (m_forceAttrib0BufferRefill
|| attribValue.value[0] != m_vertexAttrib0BufferValue[0]
|| attribValue.value[1] != m_vertexAttrib0BufferValue[1]
|| attribValue.value[2] != m_vertexAttrib0BufferValue[2]
|| attribValue.value[3] != m_vertexAttrib0BufferValue[3])) {
auto bufferData = makeUniqueArray<GC3Dfloat>(bufferSize);
for (GC3Duint ii = 0; ii < numVertex + 1; ++ii) {
bufferData[ii * 4] = attribValue.value[0];
bufferData[ii * 4 + 1] = attribValue.value[1];
bufferData[ii * 4 + 2] = attribValue.value[2];
bufferData[ii * 4 + 3] = attribValue.value[3];
}
m_vertexAttrib0BufferValue[0] = attribValue.value[0];
m_vertexAttrib0BufferValue[1] = attribValue.value[1];
m_vertexAttrib0BufferValue[2] = attribValue.value[2];
m_vertexAttrib0BufferValue[3] = attribValue.value[3];
m_forceAttrib0BufferRefill = false;
m_context->bufferSubData(GraphicsContext3D::ARRAY_BUFFER, 0, bufferDataSize, bufferData.get());
}
m_context->vertexAttribPointer(0, 4, GraphicsContext3D::FLOAT, 0, 0, 0);
return true;
}
void WebGLRenderingContextBase::restoreStatesAfterVertexAttrib0Simulation()
{
const WebGLVertexArrayObjectBase::VertexAttribState& state = m_boundVertexArrayObject->getVertexAttribState(0);
if (state.bufferBinding != m_vertexAttrib0Buffer) {
m_context->bindBuffer(GraphicsContext3D::ARRAY_BUFFER, objectOrZero(state.bufferBinding.get()));
m_context->vertexAttribPointer(0, state.size, state.type, state.normalized, state.originalStride, state.offset);
}
m_context->bindBuffer(GraphicsContext3D::ARRAY_BUFFER, objectOrZero(m_boundArrayBuffer.get()));
}
void WebGLRenderingContextBase::dispatchContextLostEvent()
{
auto* canvas = htmlCanvas();
if (!canvas)
return;
Ref<WebGLContextEvent> event = WebGLContextEvent::create(eventNames().webglcontextlostEvent, Event::CanBubble::No, Event::IsCancelable::Yes, emptyString());
canvas->dispatchEvent(event);
m_restoreAllowed = event->defaultPrevented();
if (m_contextLostMode == RealLostContext && m_restoreAllowed)
m_restoreTimer.startOneShot(0_s);
}
void WebGLRenderingContextBase::maybeRestoreContext()
{
ASSERT(m_contextLost);
if (!m_contextLost)
return;
// The rendering context is not restored unless the default behavior of the
// webglcontextlost event was prevented earlier.
//
// Because of the way m_restoreTimer is set up for real vs. synthetic lost
// context events, we don't have to worry about this test short-circuiting
// the retry loop for real context lost events.
if (!m_restoreAllowed)
return;
int contextLostReason = m_context->getExtensions().getGraphicsResetStatusARB();
switch (contextLostReason) {
case GraphicsContext3D::NO_ERROR:
// The GraphicsContext3D implementation might not fully
// support GL_ARB_robustness semantics yet. Alternatively, the
// WEBGL_lose_context extension might have been used to force
// a lost context.
break;
case Extensions3D::GUILTY_CONTEXT_RESET_ARB:
// The rendering context is not restored if this context was
// guilty of causing the graphics reset.
printToConsole(MessageLevel::Warning, "WARNING: WebGL content on the page caused the graphics card to reset; not restoring the context");
return;
case Extensions3D::INNOCENT_CONTEXT_RESET_ARB:
// Always allow the context to be restored.
break;
case Extensions3D::UNKNOWN_CONTEXT_RESET_ARB:
// Warn. Ideally, prompt the user telling them that WebGL
// content on the page might have caused the graphics card to
// reset and ask them whether they want to continue running
// the content. Only if they say "yes" should we start
// attempting to restore the context.
printToConsole(MessageLevel::Warning, "WARNING: WebGL content on the page might have caused the graphics card to reset");
break;
}
auto* canvas = htmlCanvas();
if (!canvas)
return;
RefPtr<Frame> frame = canvas->document().frame();
if (!frame)
return;
if (!frame->loader().client().allowWebGL(frame->settings().webGLEnabled()))
return;
RefPtr<FrameView> view = frame->view();
if (!view)
return;
RefPtr<ScrollView> root = view->root();
if (!root)
return;
HostWindow* hostWindow = root->hostWindow();
if (!hostWindow)
return;
RefPtr<GraphicsContext3D> context(GraphicsContext3D::create(m_attributes, hostWindow));
if (!context) {
if (m_contextLostMode == RealLostContext)
m_restoreTimer.startOneShot(secondsBetweenRestoreAttempts);
else
// This likely shouldn't happen but is the best way to report it to the WebGL app.
synthesizeGLError(GraphicsContext3D::INVALID_OPERATION, "", "error restoring context");
return;
}
m_context = context;
addActivityStateChangeObserverIfNecessary();
m_contextLost = false;
setupFlags();
initializeNewContext();
initializeVertexArrayObjects();
canvas->dispatchEvent(WebGLContextEvent::create(eventNames().webglcontextrestoredEvent, Event::CanBubble::No, Event::IsCancelable::Yes, emptyString()));
}
void WebGLRenderingContextBase::simulateContextChanged()
{
if (m_context)
m_context->simulateContextChanged();
}
String WebGLRenderingContextBase::ensureNotNull(const String& text) const
{
if (text.isNull())
return WTF::emptyString();
return text;
}
WebGLRenderingContextBase::LRUImageBufferCache::LRUImageBufferCache(int capacity)
: m_buffers(capacity)
{
}
ImageBuffer* WebGLRenderingContextBase::LRUImageBufferCache::imageBuffer(const IntSize& size)
{
size_t i;
for (i = 0; i < m_buffers.size(); ++i) {
ImageBuffer* buf = m_buffers[i].get();
if (!buf)
break;
if (buf->logicalSize() != size)
continue;
bubbleToFront(i);
buf->context().clearRect(FloatRect({ }, FloatSize(size)));
return buf;
}
// FIXME (149423): Should this ImageBuffer be unconditionally unaccelerated?
std::unique_ptr<ImageBuffer> temp = ImageBuffer::create(size, Unaccelerated);
if (!temp)
return nullptr;
ASSERT(m_buffers.size() > 0);
i = std::min(m_buffers.size() - 1, i);
m_buffers[i] = WTFMove(temp);
ImageBuffer* buf = m_buffers[i].get();
bubbleToFront(i);
return buf;
}
void WebGLRenderingContextBase::LRUImageBufferCache::bubbleToFront(size_t idx)
{
for (size_t i = idx; i > 0; --i)
m_buffers[i].swap(m_buffers[i-1]);
}
namespace {
String GetErrorString(GC3Denum error)
{
switch (error) {
case GraphicsContext3D::INVALID_ENUM:
return "INVALID_ENUM"_s;
case GraphicsContext3D::INVALID_VALUE:
return "INVALID_VALUE"_s;
case GraphicsContext3D::INVALID_OPERATION:
return "INVALID_OPERATION"_s;
case GraphicsContext3D::OUT_OF_MEMORY:
return "OUT_OF_MEMORY"_s;
case GraphicsContext3D::INVALID_FRAMEBUFFER_OPERATION:
return "INVALID_FRAMEBUFFER_OPERATION"_s;
case GraphicsContext3D::CONTEXT_LOST_WEBGL:
return "CONTEXT_LOST_WEBGL"_s;
default:
return makeString("WebGL ERROR(", hex(error, 4, Lowercase), ')');
}
}
} // namespace anonymous
void WebGLRenderingContextBase::synthesizeGLError(GC3Denum error, const char* functionName, const char* description, ConsoleDisplayPreference display)
{
if (m_synthesizedErrorsToConsole && display == DisplayInConsole) {
String str = "WebGL: " + GetErrorString(error) + ": " + String(functionName) + ": " + String(description);
printToConsole(MessageLevel::Error, str);
}
m_context->synthesizeGLError(error);
}
void WebGLRenderingContextBase::applyStencilTest()
{
bool haveStencilBuffer = false;
if (m_framebufferBinding)
haveStencilBuffer = m_framebufferBinding->hasStencilBuffer();
else {
auto attributes = getContextAttributes();
ASSERT(attributes);
haveStencilBuffer = attributes->stencil;
}
enableOrDisable(GraphicsContext3D::STENCIL_TEST, m_stencilEnabled && haveStencilBuffer);
}
void WebGLRenderingContextBase::enableOrDisable(GC3Denum capability, bool enable)
{
if (enable)
m_context->enable(capability);
else
m_context->disable(capability);
}
IntSize WebGLRenderingContextBase::clampedCanvasSize()
{
return IntSize(clamp(canvasBase().width(), 1, m_maxViewportDims[0]),
clamp(canvasBase().height(), 1, m_maxViewportDims[1]));
}
GC3Dint WebGLRenderingContextBase::getMaxDrawBuffers()
{
if (!supportsDrawBuffers())
return 0;
if (!m_maxDrawBuffers)
m_context->getIntegerv(Extensions3D::MAX_DRAW_BUFFERS_EXT, &m_maxDrawBuffers);
if (!m_maxColorAttachments)
m_context->getIntegerv(Extensions3D::MAX_COLOR_ATTACHMENTS_EXT, &m_maxColorAttachments);
// WEBGL_draw_buffers requires MAX_COLOR_ATTACHMENTS >= MAX_DRAW_BUFFERS.
return std::min(m_maxDrawBuffers, m_maxColorAttachments);
}
GC3Dint WebGLRenderingContextBase::getMaxColorAttachments()
{
if (!supportsDrawBuffers())
return 0;
if (!m_maxColorAttachments)
m_context->getIntegerv(Extensions3D::MAX_COLOR_ATTACHMENTS_EXT, &m_maxColorAttachments);
return m_maxColorAttachments;
}
void WebGLRenderingContextBase::setBackDrawBuffer(GC3Denum buf)
{
m_backDrawBuffer = buf;
}
void WebGLRenderingContextBase::restoreCurrentFramebuffer()
{
bindFramebuffer(GraphicsContext3D::FRAMEBUFFER, m_framebufferBinding.get());
}
void WebGLRenderingContextBase::restoreCurrentTexture2D()
{
auto texture = m_textureUnits[m_activeTextureUnit].texture2DBinding.get();
bindTexture(GraphicsContext3D::TEXTURE_2D, texture);
if (texture && texture->needToUseBlackTexture(textureExtensionFlags()))
m_unrenderableTextureUnits.add(m_activeTextureUnit);
}
bool WebGLRenderingContextBase::supportsDrawBuffers()
{
if (!m_drawBuffersWebGLRequirementsChecked) {
m_drawBuffersWebGLRequirementsChecked = true;
m_drawBuffersSupported = WebGLDrawBuffers::supported(*this);
}
return m_drawBuffersSupported;
}
void WebGLRenderingContextBase::drawArraysInstanced(GC3Denum mode, GC3Dint first, GC3Dsizei count, GC3Dsizei primcount)
{
if (!primcount) {
markContextChanged();
return;
}
if (!validateDrawArrays("drawArraysInstanced", mode, first, count, primcount))
return;
clearIfComposited();
bool vertexAttrib0Simulated = false;
if (!isGLES2Compliant()) {
auto simulateVertexAttrib0Status = simulateVertexAttrib0(first + count - 1);
if (!simulateVertexAttrib0Status) {
// We were unable to simulate the attribute buffer.
synthesizeGLError(GraphicsContext3D::INVALID_OPERATION, "drawArraysInstanced", "unable to simulate vertexAttrib0 array");
return;
}
vertexAttrib0Simulated = simulateVertexAttrib0Status.value();
}
if (!isGLES2NPOTStrict())
checkTextureCompleteness("drawArraysInstanced", true);
m_context->drawArraysInstanced(mode, first, count, primcount);
if (!isGLES2Compliant() && vertexAttrib0Simulated)
restoreStatesAfterVertexAttrib0Simulation();
if (!isGLES2NPOTStrict())
checkTextureCompleteness("drawArraysInstanced", false);
markContextChangedAndNotifyCanvasObserver();
}
void WebGLRenderingContextBase::drawElementsInstanced(GC3Denum mode, GC3Dsizei count, GC3Denum type, long long offset, GC3Dsizei primcount)
{
if (!primcount) {
markContextChanged();
return;
}
unsigned numElements = 0;
if (!validateDrawElements("drawElementsInstanced", mode, count, type, offset, numElements, primcount))
return;
clearIfComposited();
bool vertexAttrib0Simulated = false;
if (!isGLES2Compliant()) {
if (!numElements)
validateIndexArrayPrecise(count, type, static_cast<GC3Dintptr>(offset), numElements);
auto simulateVertexAttrib0Status = simulateVertexAttrib0(numElements);
if (!simulateVertexAttrib0Status) {
// We were unable to simulate the attribute buffer.
synthesizeGLError(GraphicsContext3D::INVALID_OPERATION, "drawArraysInstanced", "unable to simulate vertexAttrib0 array");
return;
}
vertexAttrib0Simulated = simulateVertexAttrib0Status.value();
}
if (!isGLES2NPOTStrict())
checkTextureCompleteness("drawElementsInstanced", true);
#if USE(OPENGL) && ENABLE(WEBGL2)
if (isWebGL2())
m_context->primitiveRestartIndex(getRestartIndex(type));
#endif
m_context->drawElementsInstanced(mode, count, type, static_cast<GC3Dintptr>(offset), primcount);
if (!isGLES2Compliant() && vertexAttrib0Simulated)
restoreStatesAfterVertexAttrib0Simulation();
if (!isGLES2NPOTStrict())
checkTextureCompleteness("drawElementsInstanced", false);
markContextChangedAndNotifyCanvasObserver();
}
void WebGLRenderingContextBase::vertexAttribDivisor(GC3Duint index, GC3Duint divisor)
{
if (isContextLostOrPending())
return;
if (index >= m_maxVertexAttribs) {
synthesizeGLError(GraphicsContext3D::INVALID_VALUE, "vertexAttribDivisor", "index out of range");
return;
}
m_boundVertexArrayObject->setVertexAttribDivisor(index, divisor);
m_context->vertexAttribDivisor(index, divisor);
}
bool WebGLRenderingContextBase::enableSupportedExtension(ASCIILiteral extensionNameLiteral)
{
ASSERT(m_context);
auto& extensions = m_context->getExtensions();
String extensionName { extensionNameLiteral };
if (!extensions.supports(extensionName))
return false;
extensions.ensureEnabled(extensionName);
return true;
}
void WebGLRenderingContextBase::activityStateDidChange(OptionSet<ActivityState::Flag> oldActivityState, OptionSet<ActivityState::Flag> newActivityState)
{
if (!m_context)
return;
auto changed = oldActivityState ^ newActivityState;
if (changed & ActivityState::IsVisible)
m_context->setContextVisibility(newActivityState.contains(ActivityState::IsVisible));
}
void WebGLRenderingContextBase::setFailNextGPUStatusCheck()
{
if (!m_context)
return;
m_context->setFailNextGPUStatusCheck();
}
void WebGLRenderingContextBase::didComposite()
{
if (UNLIKELY(callTracingActive()))
InspectorInstrumentation::didFinishRecordingCanvasFrame(*this);
}
void WebGLRenderingContextBase::forceContextLost()
{
forceLostContext(WebGLRenderingContextBase::RealLostContext);
}
void WebGLRenderingContextBase::recycleContext()
{
printToConsole(MessageLevel::Error, "There are too many active WebGL contexts on this page, the oldest context will be lost.");
// Using SyntheticLostContext means the developer won't be able to force the restoration
// of the context by calling preventDefault() in a "webglcontextlost" event handler.
forceLostContext(SyntheticLostContext);
destroyGraphicsContext3D();
}
void WebGLRenderingContextBase::dispatchContextChangedNotification()
{
auto* canvas = htmlCanvas();
if (!canvas)
return;
canvas->dispatchEvent(WebGLContextEvent::create(eventNames().webglcontextchangedEvent, Event::CanBubble::No, Event::IsCancelable::Yes, emptyString()));
}
} // namespace WebCore
#endif // ENABLE(WEBGL)