blob: f5e12f730f4812747237bf13c59d3b56b91161cb [file] [log] [blame]
/*
* Copyright (C) 2015-2020 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 "WebGLRenderingContext.h"
#if ENABLE(WEBGL)
#include "ANGLEInstancedArrays.h"
#include "CachedImage.h"
#include "EXTBlendMinMax.h"
#include "EXTColorBufferHalfFloat.h"
#include "EXTFloatBlend.h"
#include "EXTFragDepth.h"
#include "EXTShaderTextureLOD.h"
#include "EXTTextureCompressionBPTC.h"
#include "EXTTextureCompressionRGTC.h"
#include "EXTTextureFilterAnisotropic.h"
#include "EXTsRGB.h"
#include "HTMLCanvasElement.h"
#include "HTMLImageElement.h"
#include "HTMLVideoElement.h"
#include "ImageData.h"
#include "InspectorInstrumentation.h"
#include "KHRParallelShaderCompile.h"
#include "OESElementIndexUint.h"
#include "OESFBORenderMipmap.h"
#include "OESStandardDerivatives.h"
#include "OESTextureFloat.h"
#include "OESTextureFloatLinear.h"
#include "OESTextureHalfFloat.h"
#include "OESTextureHalfFloatLinear.h"
#include "OESVertexArrayObject.h"
#include "RenderBox.h"
#include "RuntimeEnabledFeatures.h"
#include "WebGLBuffer.h"
#include "WebGLColorBufferFloat.h"
#include "WebGLCompressedTextureASTC.h"
#include "WebGLCompressedTextureATC.h"
#include "WebGLCompressedTextureETC.h"
#include "WebGLCompressedTextureETC1.h"
#include "WebGLCompressedTexturePVRTC.h"
#include "WebGLCompressedTextureS3TC.h"
#include "WebGLCompressedTextureS3TCsRGB.h"
#include "WebGLDebugRendererInfo.h"
#include "WebGLDebugShaders.h"
#include "WebGLDepthTexture.h"
#include "WebGLDrawBuffers.h"
#include "WebGLFramebuffer.h"
#include "WebGLLoseContext.h"
#include "WebGLMultiDraw.h"
#include "WebGLProgram.h"
#include "WebGLRenderbuffer.h"
#include "WebGLSampler.h"
#include "WebGLTexture.h"
#include "WebGLTransformFeedback.h"
#include "WebGLVertexArrayObject.h"
#include "WebGLVertexArrayObjectOES.h"
#include <JavaScriptCore/GenericTypedArrayViewInlines.h>
#include <JavaScriptCore/HeapInlines.h>
#include <JavaScriptCore/JSCJSValueInlines.h>
#include <JavaScriptCore/JSCellInlines.h>
#include <JavaScriptCore/JSGenericTypedArrayViewInlines.h>
#include <wtf/IsoMallocInlines.h>
namespace WebCore {
WTF_MAKE_ISO_ALLOCATED_IMPL(WebGLRenderingContext);
std::unique_ptr<WebGLRenderingContext> WebGLRenderingContext::create(CanvasBase& canvas, GraphicsContextGLAttributes attributes)
{
auto renderingContext = std::unique_ptr<WebGLRenderingContext>(new WebGLRenderingContext(canvas, attributes));
// This context is pending policy resolution, so don't call initializeNewContext on it yet.
InspectorInstrumentation::didCreateCanvasRenderingContext(*renderingContext);
return renderingContext;
}
std::unique_ptr<WebGLRenderingContext> WebGLRenderingContext::create(CanvasBase& canvas, Ref<GraphicsContextGL>&& context, GraphicsContextGLAttributes attributes)
{
auto renderingContext = std::unique_ptr<WebGLRenderingContext>(new WebGLRenderingContext(canvas, WTFMove(context), attributes));
// This is virtual and can't be called in the constructor.
renderingContext->initializeNewContext();
InspectorInstrumentation::didCreateCanvasRenderingContext(*renderingContext);
return renderingContext;
}
WebGLRenderingContext::WebGLRenderingContext(CanvasBase& canvas, GraphicsContextGLAttributes attributes)
: WebGLRenderingContextBase(canvas, attributes)
{
}
WebGLRenderingContext::WebGLRenderingContext(CanvasBase& canvas, Ref<GraphicsContextGL>&& context, GraphicsContextGLAttributes attributes)
: WebGLRenderingContextBase(canvas, WTFMove(context), attributes)
{
if (isContextLost())
return;
}
void WebGLRenderingContext::initializeVertexArrayObjects()
{
#if !USE(ANGLE)
if (!isGLES2Compliant())
initVertexAttrib0();
#endif
m_defaultVertexArrayObject = WebGLVertexArrayObjectOES::create(*this, WebGLVertexArrayObjectOES::Type::Default);
addContextObject(*m_defaultVertexArrayObject);
m_boundVertexArrayObject = m_defaultVertexArrayObject;
}
WebGLExtension* WebGLRenderingContext::getExtension(const String& name)
{
if (isContextLostOrPending())
return nullptr;
#define ENABLE_IF_REQUESTED(type, variable, nameLiteral, canEnable) \
if (equalIgnoringASCIICase(name, nameLiteral ## _s)) { \
if (!variable) { \
variable = (canEnable) ? adoptRef(new type(*this)) : nullptr; \
if (variable != nullptr) \
InspectorInstrumentation::didEnableExtension(*this, name); \
} \
return variable.get(); \
}
ENABLE_IF_REQUESTED(ANGLEInstancedArrays, m_angleInstancedArrays, "ANGLE_instanced_arrays", ANGLEInstancedArrays::supported(*m_context));
ENABLE_IF_REQUESTED(EXTBlendMinMax, m_extBlendMinMax, "EXT_blend_minmax", EXTBlendMinMax::supported(*m_context));
ENABLE_IF_REQUESTED(EXTColorBufferHalfFloat, m_extColorBufferHalfFloat, "EXT_color_buffer_half_float", EXTColorBufferHalfFloat::supported(*m_context));
ENABLE_IF_REQUESTED(EXTFloatBlend, m_extFloatBlend, "EXT_float_blend", EXTFloatBlend::supported(*m_context));
ENABLE_IF_REQUESTED(EXTFragDepth, m_extFragDepth, "EXT_frag_depth", EXTFragDepth::supported(*m_context));
ENABLE_IF_REQUESTED(EXTShaderTextureLOD, m_extShaderTextureLOD, "EXT_shader_texture_lod", EXTShaderTextureLOD::supported(*m_context));
ENABLE_IF_REQUESTED(EXTTextureCompressionBPTC, m_extTextureCompressionBPTC, "EXT_texture_compression_bptc", EXTTextureCompressionBPTC::supported(*m_context));
ENABLE_IF_REQUESTED(EXTTextureCompressionRGTC, m_extTextureCompressionRGTC, "EXT_texture_compression_rgtc", EXTTextureCompressionRGTC::supported(*m_context));
ENABLE_IF_REQUESTED(EXTTextureFilterAnisotropic, m_extTextureFilterAnisotropic, "EXT_texture_filter_anisotropic", EXTTextureFilterAnisotropic::supported(*m_context));
ENABLE_IF_REQUESTED(EXTsRGB, m_extsRGB, "EXT_sRGB", EXTsRGB::supported(*m_context));
ENABLE_IF_REQUESTED(KHRParallelShaderCompile, m_khrParallelShaderCompile, "KHR_parallel_shader_compile", KHRParallelShaderCompile::supported(*m_context));
ENABLE_IF_REQUESTED(OESElementIndexUint, m_oesElementIndexUint, "OES_element_index_uint", OESElementIndexUint::supported(*m_context));
ENABLE_IF_REQUESTED(OESFBORenderMipmap, m_oesFBORenderMipmap, "OES_fbo_render_mipmap", OESFBORenderMipmap::supported(*m_context));
ENABLE_IF_REQUESTED(OESStandardDerivatives, m_oesStandardDerivatives, "OES_standard_derivatives", OESStandardDerivatives::supported(*m_context));
ENABLE_IF_REQUESTED(OESTextureFloat, m_oesTextureFloat, "OES_texture_float", OESTextureFloat::supported(*m_context));
ENABLE_IF_REQUESTED(OESTextureFloatLinear, m_oesTextureFloatLinear, "OES_texture_float_linear", OESTextureFloatLinear::supported(*m_context));
ENABLE_IF_REQUESTED(OESTextureHalfFloat, m_oesTextureHalfFloat, "OES_texture_half_float", OESTextureHalfFloat::supported(*m_context));
ENABLE_IF_REQUESTED(OESTextureHalfFloatLinear, m_oesTextureHalfFloatLinear, "OES_texture_half_float_linear", OESTextureHalfFloatLinear::supported(*m_context));
ENABLE_IF_REQUESTED(OESVertexArrayObject, m_oesVertexArrayObject, "OES_vertex_array_object", OESVertexArrayObject::supported(*m_context));
ENABLE_IF_REQUESTED(WebGLColorBufferFloat, m_webglColorBufferFloat, "WEBGL_color_buffer_float", WebGLColorBufferFloat::supported(*m_context));
ENABLE_IF_REQUESTED(WebGLCompressedTextureASTC, m_webglCompressedTextureASTC, "WEBGL_compressed_texture_astc", WebGLCompressedTextureASTC::supported(*m_context));
ENABLE_IF_REQUESTED(WebGLCompressedTextureATC, m_webglCompressedTextureATC, "WEBKIT_WEBGL_compressed_texture_atc", WebGLCompressedTextureATC::supported(*m_context));
ENABLE_IF_REQUESTED(WebGLCompressedTextureETC, m_webglCompressedTextureETC, "WEBGL_compressed_texture_etc", WebGLCompressedTextureETC::supported(*m_context));
ENABLE_IF_REQUESTED(WebGLCompressedTextureETC1, m_webglCompressedTextureETC1, "WEBGL_compressed_texture_etc1", WebGLCompressedTextureETC1::supported(*m_context));
ENABLE_IF_REQUESTED(WebGLCompressedTexturePVRTC, m_webglCompressedTexturePVRTC, "WEBGL_compressed_texture_pvrtc", WebGLCompressedTexturePVRTC::supported(*m_context));
ENABLE_IF_REQUESTED(WebGLCompressedTexturePVRTC, m_webglCompressedTexturePVRTC, "WEBKIT_WEBGL_compressed_texture_pvrtc", WebGLCompressedTexturePVRTC::supported(*m_context));
ENABLE_IF_REQUESTED(WebGLCompressedTextureS3TC, m_webglCompressedTextureS3TC, "WEBGL_compressed_texture_s3tc", WebGLCompressedTextureS3TC::supported(*m_context));
ENABLE_IF_REQUESTED(WebGLCompressedTextureS3TCsRGB, m_webglCompressedTextureS3TCsRGB, "WEBGL_compressed_texture_s3tc_srgb", WebGLCompressedTextureS3TCsRGB::supported(*m_context));
ENABLE_IF_REQUESTED(WebGLDebugRendererInfo, m_webglDebugRendererInfo, "WEBGL_debug_renderer_info", true);
ENABLE_IF_REQUESTED(WebGLDebugShaders, m_webglDebugShaders, "WEBGL_debug_shaders", WebGLDebugShaders::supported(*m_context));
ENABLE_IF_REQUESTED(WebGLDepthTexture, m_webglDepthTexture, "WEBGL_depth_texture", WebGLDepthTexture::supported(*m_context));
ENABLE_IF_REQUESTED(WebGLDrawBuffers, m_webglDrawBuffers, "WEBGL_draw_buffers", supportsDrawBuffers());
ENABLE_IF_REQUESTED(WebGLLoseContext, m_webglLoseContext, "WEBGL_lose_context", true);
ENABLE_IF_REQUESTED(WebGLMultiDraw, m_webglMultiDraw, "WEBGL_multi_draw", WebGLMultiDraw::supported(*m_context));
return nullptr;
}
std::optional<Vector<String>> WebGLRenderingContext::getSupportedExtensions()
{
if (isContextLost())
return std::nullopt;
Vector<String> result;
if (m_isPendingPolicyResolution)
return result;
#define APPEND_IF_SUPPORTED(nameLiteral, condition) \
if (condition) \
result.append(nameLiteral ## _s);
APPEND_IF_SUPPORTED("ANGLE_instanced_arrays", ANGLEInstancedArrays::supported(*m_context))
APPEND_IF_SUPPORTED("EXT_blend_minmax", EXTBlendMinMax::supported(*m_context))
APPEND_IF_SUPPORTED("EXT_color_buffer_half_float", EXTColorBufferHalfFloat::supported(*m_context))
APPEND_IF_SUPPORTED("EXT_float_blend", EXTFloatBlend::supported(*m_context))
APPEND_IF_SUPPORTED("EXT_frag_depth", EXTFragDepth::supported(*m_context))
APPEND_IF_SUPPORTED("EXT_shader_texture_lod", EXTShaderTextureLOD::supported(*m_context))
APPEND_IF_SUPPORTED("EXT_texture_compression_bptc", EXTTextureCompressionBPTC::supported(*m_context))
APPEND_IF_SUPPORTED("EXT_texture_compression_rgtc", EXTTextureCompressionRGTC::supported(*m_context))
APPEND_IF_SUPPORTED("EXT_texture_filter_anisotropic", EXTTextureFilterAnisotropic::supported(*m_context))
APPEND_IF_SUPPORTED("EXT_sRGB", EXTsRGB::supported(*m_context))
APPEND_IF_SUPPORTED("KHR_parallel_shader_compile", KHRParallelShaderCompile::supported(*m_context))
APPEND_IF_SUPPORTED("OES_element_index_uint", OESElementIndexUint::supported(*m_context))
APPEND_IF_SUPPORTED("OES_fbo_render_mipmap", OESFBORenderMipmap::supported(*m_context))
APPEND_IF_SUPPORTED("OES_standard_derivatives", OESStandardDerivatives::supported(*m_context))
APPEND_IF_SUPPORTED("OES_texture_float", OESTextureFloat::supported(*m_context))
APPEND_IF_SUPPORTED("OES_texture_float_linear", OESTextureFloatLinear::supported(*m_context))
APPEND_IF_SUPPORTED("OES_texture_half_float", OESTextureHalfFloat::supported(*m_context))
APPEND_IF_SUPPORTED("OES_texture_half_float_linear", OESTextureHalfFloatLinear::supported(*m_context))
APPEND_IF_SUPPORTED("OES_vertex_array_object", OESVertexArrayObject::supported(*m_context))
APPEND_IF_SUPPORTED("WEBGL_color_buffer_float", WebGLColorBufferFloat::supported(*m_context))
APPEND_IF_SUPPORTED("WEBGL_compressed_texture_astc", WebGLCompressedTextureASTC::supported(*m_context))
APPEND_IF_SUPPORTED("WEBKIT_WEBGL_compressed_texture_atc", WebGLCompressedTextureATC::supported(*m_context))
APPEND_IF_SUPPORTED("WEBGL_compressed_texture_etc", WebGLCompressedTextureETC::supported(*m_context))
APPEND_IF_SUPPORTED("WEBGL_compressed_texture_etc1", WebGLCompressedTextureETC1::supported(*m_context))
APPEND_IF_SUPPORTED("WEBGL_compressed_texture_pvrtc", WebGLCompressedTexturePVRTC::supported(*m_context))
APPEND_IF_SUPPORTED("WEBKIT_WEBGL_compressed_texture_pvrtc", WebGLCompressedTexturePVRTC::supported(*m_context))
APPEND_IF_SUPPORTED("WEBGL_compressed_texture_s3tc", WebGLCompressedTextureS3TC::supported(*m_context))
APPEND_IF_SUPPORTED("WEBGL_compressed_texture_s3tc_srgb", WebGLCompressedTextureS3TCsRGB::supported(*m_context))
APPEND_IF_SUPPORTED("WEBGL_debug_renderer_info", true)
APPEND_IF_SUPPORTED("WEBGL_debug_shaders", WebGLDebugShaders::supported(*m_context))
APPEND_IF_SUPPORTED("WEBGL_depth_texture", WebGLDepthTexture::supported(*m_context))
APPEND_IF_SUPPORTED("WEBGL_draw_buffers", supportsDrawBuffers())
APPEND_IF_SUPPORTED("WEBGL_lose_context", true)
APPEND_IF_SUPPORTED("WEBGL_multi_draw", WebGLMultiDraw::supported(*m_context))
return result;
}
WebGLAny WebGLRenderingContext::getFramebufferAttachmentParameter(GCGLenum target, GCGLenum attachment, GCGLenum pname)
{
if (isContextLostOrPending() || !validateFramebufferFuncParameters("getFramebufferAttachmentParameter", target, attachment))
return nullptr;
if (!m_framebufferBinding || !m_framebufferBinding->object()) {
synthesizeGLError(GraphicsContextGL::INVALID_OPERATION, "getFramebufferAttachmentParameter", "no framebuffer bound");
return nullptr;
}
#if ENABLE(WEBXR)
if (m_framebufferBinding->isOpaque()) {
synthesizeGLError(GraphicsContextGL::INVALID_OPERATION, "getFramebufferAttachmentParameter", "An opaque framebuffer's attachments cannot be inspected or changed");
return nullptr;
}
#endif
RefPtr object = m_framebufferBinding->getAttachmentObject(attachment);
if (!object) {
if (pname == GraphicsContextGL::FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE)
return static_cast<unsigned>(GraphicsContextGL::NONE);
// OpenGL ES 2.0 specifies INVALID_ENUM in this case, while desktop GL
// specifies INVALID_OPERATION.
synthesizeGLError(GraphicsContextGL::INVALID_ENUM, "getFramebufferAttachmentParameter", "invalid parameter name");
return nullptr;
}
if (object->isTexture()) {
switch (pname) {
case GraphicsContextGL::FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE:
return static_cast<unsigned>(GraphicsContextGL::TEXTURE);
case GraphicsContextGL::FRAMEBUFFER_ATTACHMENT_OBJECT_NAME:
return static_pointer_cast<WebGLTexture>(WTFMove(object));
case GraphicsContextGL::FRAMEBUFFER_ATTACHMENT_TEXTURE_LEVEL:
case GraphicsContextGL::FRAMEBUFFER_ATTACHMENT_TEXTURE_CUBE_MAP_FACE:
case GraphicsContextGL::FRAMEBUFFER_ATTACHMENT_COLOR_ENCODING_EXT:
return m_context->getFramebufferAttachmentParameteri(target, attachment, pname);
default:
synthesizeGLError(GraphicsContextGL::INVALID_ENUM, "getFramebufferAttachmentParameter", "invalid parameter name for texture attachment");
return nullptr;
}
} else {
ASSERT(object->isRenderbuffer());
switch (pname) {
case GraphicsContextGL::FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE:
return static_cast<unsigned>(GraphicsContextGL::RENDERBUFFER);
case GraphicsContextGL::FRAMEBUFFER_ATTACHMENT_OBJECT_NAME:
return static_pointer_cast<WebGLRenderbuffer>(WTFMove(object));
case GraphicsContextGL::FRAMEBUFFER_ATTACHMENT_COLOR_ENCODING_EXT: {
if (!m_extsRGB) {
synthesizeGLError(GraphicsContextGL::INVALID_ENUM, "getFramebufferAttachmentParameter", "invalid parameter name for renderbuffer attachment");
return nullptr;
}
RefPtr renderBuffer = static_pointer_cast<WebGLRenderbuffer>(WTFMove(object));
GCGLenum renderBufferFormat = renderBuffer->getInternalFormat();
ASSERT(renderBufferFormat != GraphicsContextGL::SRGB_EXT && renderBufferFormat != GraphicsContextGL::SRGB_ALPHA_EXT);
if (renderBufferFormat == GraphicsContextGL::SRGB8_ALPHA8_EXT)
return static_cast<unsigned>(GraphicsContextGL::SRGB_EXT);
return static_cast<unsigned>(GraphicsContextGL::LINEAR);
}
default:
synthesizeGLError(GraphicsContextGL::INVALID_ENUM, "getFramebufferAttachmentParameter", "invalid parameter name for renderbuffer attachment");
return nullptr;
}
}
}
GCGLint WebGLRenderingContext::getMaxDrawBuffers()
{
if (!supportsDrawBuffers())
return 0;
if (!m_maxDrawBuffers)
m_maxDrawBuffers = m_context->getInteger(GraphicsContextGL::MAX_DRAW_BUFFERS_EXT);
if (!m_maxColorAttachments)
m_maxColorAttachments = m_context->getInteger(GraphicsContextGL::MAX_COLOR_ATTACHMENTS_EXT);
// WEBGL_draw_buffers requires MAX_COLOR_ATTACHMENTS >= MAX_DRAW_BUFFERS.
return std::min(m_maxDrawBuffers, m_maxColorAttachments);
}
GCGLint WebGLRenderingContext::getMaxColorAttachments()
{
if (!supportsDrawBuffers())
return 0;
if (!m_maxColorAttachments)
m_maxColorAttachments = m_context->getInteger(GraphicsContextGL::MAX_COLOR_ATTACHMENTS_EXT);
return m_maxColorAttachments;
}
bool WebGLRenderingContext::validateIndexArrayConservative(GCGLenum type, unsigned& numElementsRequired)
{
// Performs conservative validation by caching a maximum index of
// the given type per element array buffer. If all of the bound
// array buffers have enough elements to satisfy that maximum
// index, skips the expensive per-draw-call iteration in
// validateIndexArrayPrecise.
RefPtr<WebGLBuffer> elementArrayBuffer = m_boundVertexArrayObject->getElementArrayBuffer();
if (!elementArrayBuffer)
return false;
GCGLsizeiptr numElements = elementArrayBuffer->byteLength();
// The case count==0 is already dealt with in drawElements before validateIndexArrayConservative.
if (!numElements)
return false;
auto buffer = elementArrayBuffer->elementArrayBuffer();
ASSERT(buffer);
std::optional<unsigned> maxIndex = elementArrayBuffer->getCachedMaxIndex(type);
if (!maxIndex) {
// Compute the maximum index in the entire buffer for the given type of index.
switch (type) {
case GraphicsContextGL::UNSIGNED_BYTE: {
const GCGLubyte* p = static_cast<const GCGLubyte*>(buffer->data());
for (GCGLsizeiptr i = 0; i < numElements; i++)
maxIndex = maxIndex ? std::max(maxIndex.value(), static_cast<unsigned>(p[i])) : static_cast<unsigned>(p[i]);
break;
}
case GraphicsContextGL::UNSIGNED_SHORT: {
numElements /= sizeof(GCGLushort);
const GCGLushort* p = static_cast<const GCGLushort*>(buffer->data());
for (GCGLsizeiptr i = 0; i < numElements; i++)
maxIndex = maxIndex ? std::max(maxIndex.value(), static_cast<unsigned>(p[i])) : static_cast<unsigned>(p[i]);
break;
}
case GraphicsContextGL::UNSIGNED_INT: {
if (!m_oesElementIndexUint)
return false;
numElements /= sizeof(GCGLuint);
const GCGLuint* p = static_cast<const GCGLuint*>(buffer->data());
for (GCGLsizeiptr i = 0; i < numElements; i++)
maxIndex = maxIndex ? std::max(maxIndex.value(), static_cast<unsigned>(p[i])) : static_cast<unsigned>(p[i]);
break;
}
default:
return false;
}
if (maxIndex)
elementArrayBuffer->setCachedMaxIndex(type, maxIndex.value());
}
if (!maxIndex)
return false;
// The number of required elements is one more than the maximum index that will be accessed.
auto checkedNumElementsRequired = checkedAddAndMultiply<unsigned>(maxIndex.value(), 1, 1);
if (!checkedNumElementsRequired)
return false;
numElementsRequired = checkedNumElementsRequired.value();
return true;
}
bool WebGLRenderingContext::validateBlendEquation(const char* functionName, GCGLenum mode)
{
switch (mode) {
case GraphicsContextGL::FUNC_ADD:
case GraphicsContextGL::FUNC_SUBTRACT:
case GraphicsContextGL::FUNC_REVERSE_SUBTRACT:
case GraphicsContextGL::MIN_EXT:
case GraphicsContextGL::MAX_EXT:
if ((mode == GraphicsContextGL::MIN_EXT || mode == GraphicsContextGL::MAX_EXT) && !m_extBlendMinMax) {
synthesizeGLError(GraphicsContextGL::INVALID_ENUM, functionName, "invalid mode");
return false;
}
return true;
break;
default:
synthesizeGLError(GraphicsContextGL::INVALID_ENUM, functionName, "invalid mode");
return false;
}
}
} // namespace WebCore
#endif // ENABLE(WEBGL)