| /* |
| * 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 "WebGLRenderingContext.h" |
| |
| #if ENABLE(WEBGL) |
| |
| #include "ANGLEInstancedArrays.h" |
| #include "CachedImage.h" |
| #include "EXTBlendMinMax.h" |
| #include "EXTFragDepth.h" |
| #include "EXTShaderTextureLOD.h" |
| #include "EXTTextureFilterAnisotropic.h" |
| #include "EXTsRGB.h" |
| #include "Extensions3D.h" |
| #include "HTMLCanvasElement.h" |
| #include "HTMLImageElement.h" |
| #include "HTMLVideoElement.h" |
| #include "ImageData.h" |
| #include "InspectorInstrumentation.h" |
| #include "OESElementIndexUint.h" |
| #include "OESStandardDerivatives.h" |
| #include "OESTextureFloat.h" |
| #include "OESTextureFloatLinear.h" |
| #include "OESTextureHalfFloat.h" |
| #include "OESTextureHalfFloatLinear.h" |
| #include "OESVertexArrayObject.h" |
| #include "RenderBox.h" |
| #include "WebGLCompressedTextureASTC.h" |
| #include "WebGLCompressedTextureATC.h" |
| #include "WebGLCompressedTexturePVRTC.h" |
| #include "WebGLCompressedTextureS3TC.h" |
| #include "WebGLDebugRendererInfo.h" |
| #include "WebGLDebugShaders.h" |
| #include "WebGLDepthTexture.h" |
| #include "WebGLDrawBuffers.h" |
| #include "WebGLLoseContext.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, GraphicsContext3DAttributes attributes) |
| { |
| auto renderingContext = std::unique_ptr<WebGLRenderingContext>(new WebGLRenderingContext(canvas, attributes)); |
| |
| InspectorInstrumentation::didCreateCanvasRenderingContext(*renderingContext); |
| |
| return renderingContext; |
| } |
| |
| std::unique_ptr<WebGLRenderingContext> WebGLRenderingContext::create(CanvasBase& canvas, Ref<GraphicsContext3D>&& context, GraphicsContext3DAttributes attributes) |
| { |
| auto renderingContext = std::unique_ptr<WebGLRenderingContext>(new WebGLRenderingContext(canvas, WTFMove(context), attributes)); |
| |
| InspectorInstrumentation::didCreateCanvasRenderingContext(*renderingContext); |
| |
| return renderingContext; |
| } |
| |
| WebGLRenderingContext::WebGLRenderingContext(CanvasBase& canvas, GraphicsContext3DAttributes attributes) |
| : WebGLRenderingContextBase(canvas, attributes) |
| { |
| } |
| |
| WebGLRenderingContext::WebGLRenderingContext(CanvasBase& canvas, Ref<GraphicsContext3D>&& context, GraphicsContext3DAttributes attributes) |
| : WebGLRenderingContextBase(canvas, WTFMove(context), attributes) |
| { |
| initializeVertexArrayObjects(); |
| } |
| |
| void WebGLRenderingContext::initializeVertexArrayObjects() |
| { |
| m_defaultVertexArrayObject = WebGLVertexArrayObjectOES::create(*this, WebGLVertexArrayObjectOES::Type::Default); |
| addContextObject(*m_defaultVertexArrayObject); |
| m_boundVertexArrayObject = m_defaultVertexArrayObject; |
| if (!isGLES2Compliant()) |
| initVertexAttrib0(); |
| } |
| |
| WebGLExtension* WebGLRenderingContext::getExtension(const String& name) |
| { |
| if (isContextLostOrPending()) |
| return nullptr; |
| |
| #define ENABLE_IF_REQUESTED(type, variable, nameLiteral, canEnable) \ |
| if (equalIgnoringASCIICase(name, nameLiteral)) { \ |
| if (!variable) { \ |
| variable = (canEnable) ? std::make_unique<type>(*this) : nullptr; \ |
| if (variable != nullptr) \ |
| InspectorInstrumentation::didEnableExtension(*this, name); \ |
| } \ |
| return variable.get(); \ |
| } |
| |
| ENABLE_IF_REQUESTED(EXTBlendMinMax, m_extBlendMinMax, "EXT_blend_minmax", enableSupportedExtension("GL_EXT_blend_minmax"_s)); |
| ENABLE_IF_REQUESTED(EXTsRGB, m_extsRGB, "EXT_sRGB", enableSupportedExtension("GL_EXT_sRGB"_s)); |
| ENABLE_IF_REQUESTED(EXTFragDepth, m_extFragDepth, "EXT_frag_depth", enableSupportedExtension("GL_EXT_frag_depth"_s)); |
| if (equalIgnoringASCIICase(name, "EXT_shader_texture_lod")) { |
| if (!m_extShaderTextureLOD) { |
| if (!(m_context->getExtensions().supports("GL_EXT_shader_texture_lod"_s) || m_context->getExtensions().supports("GL_ARB_shader_texture_lod"_s))) |
| m_extShaderTextureLOD = nullptr; |
| else { |
| m_context->getExtensions().ensureEnabled("GL_EXT_shader_texture_lod"_s); |
| m_extShaderTextureLOD = std::make_unique<EXTShaderTextureLOD>(*this); |
| InspectorInstrumentation::didEnableExtension(*this, name); |
| } |
| } |
| return m_extShaderTextureLOD.get(); |
| } |
| ENABLE_IF_REQUESTED(EXTTextureFilterAnisotropic, m_extTextureFilterAnisotropic, "EXT_texture_filter_anisotropic", enableSupportedExtension("GL_EXT_texture_filter_anisotropic"_s)); |
| ENABLE_IF_REQUESTED(EXTTextureFilterAnisotropic, m_extTextureFilterAnisotropic, "WEBKIT_EXT_texture_filter_anisotropic", enableSupportedExtension("GL_EXT_texture_filter_anisotropic"_s)); |
| ENABLE_IF_REQUESTED(OESStandardDerivatives, m_oesStandardDerivatives, "OES_standard_derivatives", enableSupportedExtension("GL_OES_standard_derivatives"_s)); |
| ENABLE_IF_REQUESTED(OESTextureFloat, m_oesTextureFloat, "OES_texture_float", enableSupportedExtension("GL_OES_texture_float"_s)); |
| ENABLE_IF_REQUESTED(OESTextureFloatLinear, m_oesTextureFloatLinear, "OES_texture_float_linear", enableSupportedExtension("GL_OES_texture_float_linear"_s)); |
| ENABLE_IF_REQUESTED(OESTextureHalfFloat, m_oesTextureHalfFloat, "OES_texture_half_float", enableSupportedExtension("GL_OES_texture_half_float"_s)); |
| ENABLE_IF_REQUESTED(OESTextureHalfFloatLinear, m_oesTextureHalfFloatLinear, "OES_texture_half_float_linear", enableSupportedExtension("GL_OES_texture_half_float_linear"_s)); |
| ENABLE_IF_REQUESTED(OESVertexArrayObject, m_oesVertexArrayObject, "OES_vertex_array_object", enableSupportedExtension("GL_OES_vertex_array_object"_s)); |
| ENABLE_IF_REQUESTED(OESElementIndexUint, m_oesElementIndexUint, "OES_element_index_uint", enableSupportedExtension("GL_OES_element_index_uint"_s)); |
| ENABLE_IF_REQUESTED(WebGLLoseContext, m_webglLoseContext, "WEBGL_lose_context", true); |
| ENABLE_IF_REQUESTED(WebGLCompressedTextureATC, m_webglCompressedTextureATC, "WEBKIT_WEBGL_compressed_texture_atc", WebGLCompressedTextureATC::supported(*this)); |
| ENABLE_IF_REQUESTED(WebGLCompressedTexturePVRTC, m_webglCompressedTexturePVRTC, "WEBKIT_WEBGL_compressed_texture_pvrtc", WebGLCompressedTexturePVRTC::supported(*this)); |
| ENABLE_IF_REQUESTED(WebGLCompressedTextureS3TC, m_webglCompressedTextureS3TC, "WEBGL_compressed_texture_s3tc", WebGLCompressedTextureS3TC::supported(*this)); |
| ENABLE_IF_REQUESTED(WebGLCompressedTextureASTC, m_webglCompressedTextureASTC, "WEBGL_compressed_texture_astc", WebGLCompressedTextureASTC::supported(*this)); |
| ENABLE_IF_REQUESTED(WebGLDepthTexture, m_webglDepthTexture, "WEBGL_depth_texture", WebGLDepthTexture::supported(*m_context)); |
| if (equalIgnoringASCIICase(name, "WEBGL_draw_buffers")) { |
| if (!m_webglDrawBuffers) { |
| if (!supportsDrawBuffers()) |
| m_webglDrawBuffers = nullptr; |
| else { |
| m_context->getExtensions().ensureEnabled("GL_EXT_draw_buffers"_s); |
| m_webglDrawBuffers = std::make_unique<WebGLDrawBuffers>(*this); |
| InspectorInstrumentation::didEnableExtension(*this, name); |
| } |
| } |
| return m_webglDrawBuffers.get(); |
| } |
| if (equalIgnoringASCIICase(name, "ANGLE_instanced_arrays")) { |
| if (!m_angleInstancedArrays) { |
| if (!ANGLEInstancedArrays::supported(*this)) |
| m_angleInstancedArrays = nullptr; |
| else { |
| m_context->getExtensions().ensureEnabled("GL_ANGLE_instanced_arrays"_s); |
| m_angleInstancedArrays = std::make_unique<ANGLEInstancedArrays>(*this); |
| InspectorInstrumentation::didEnableExtension(*this, name); |
| } |
| } |
| return m_angleInstancedArrays.get(); |
| } |
| ENABLE_IF_REQUESTED(WebGLDebugRendererInfo, m_webglDebugRendererInfo, "WEBGL_debug_renderer_info", true); |
| ENABLE_IF_REQUESTED(WebGLDebugShaders, m_webglDebugShaders, "WEBGL_debug_shaders", m_context->getExtensions().supports("GL_ANGLE_translated_shader_source"_s)); |
| return nullptr; |
| } |
| |
| Optional<Vector<String>> WebGLRenderingContext::getSupportedExtensions() |
| { |
| if (isContextLost()) |
| return WTF::nullopt; |
| |
| Vector<String> result; |
| |
| if (m_isPendingPolicyResolution) |
| return result; |
| |
| if (m_context->getExtensions().supports("GL_EXT_blend_minmax"_s)) |
| result.append("EXT_blend_minmax"_s); |
| if (m_context->getExtensions().supports("GL_EXT_sRGB"_s)) |
| result.append("EXT_sRGB"_s); |
| if (m_context->getExtensions().supports("GL_EXT_frag_depth"_s)) |
| result.append("EXT_frag_depth"_s); |
| if (m_context->getExtensions().supports("GL_OES_texture_float"_s)) |
| result.append("OES_texture_float"_s); |
| if (m_context->getExtensions().supports("GL_OES_texture_float_linear"_s)) |
| result.append("OES_texture_float_linear"_s); |
| if (m_context->getExtensions().supports("GL_OES_texture_half_float"_s)) |
| result.append("OES_texture_half_float"_s); |
| if (m_context->getExtensions().supports("GL_OES_texture_half_float_linear"_s)) |
| result.append("OES_texture_half_float_linear"_s); |
| if (m_context->getExtensions().supports("GL_OES_standard_derivatives"_s)) |
| result.append("OES_standard_derivatives"_s); |
| if (m_context->getExtensions().supports("GL_EXT_shader_texture_lod"_s) || m_context->getExtensions().supports("GL_ARB_shader_texture_lod"_s)) |
| result.append("EXT_shader_texture_lod"_s); |
| if (m_context->getExtensions().supports("GL_EXT_texture_filter_anisotropic"_s)) |
| result.append("EXT_texture_filter_anisotropic"_s); |
| if (m_context->getExtensions().supports("GL_OES_vertex_array_object"_s)) |
| result.append("OES_vertex_array_object"_s); |
| if (m_context->getExtensions().supports("GL_OES_element_index_uint"_s)) |
| result.append("OES_element_index_uint"_s); |
| result.append("WEBGL_lose_context"_s); |
| if (WebGLCompressedTextureATC::supported(*this)) |
| result.append("WEBKIT_WEBGL_compressed_texture_atc"_s); |
| if (WebGLCompressedTexturePVRTC::supported(*this)) |
| result.append("WEBKIT_WEBGL_compressed_texture_pvrtc"_s); |
| if (WebGLCompressedTextureS3TC::supported(*this)) |
| result.append("WEBGL_compressed_texture_s3tc"_s); |
| if (WebGLCompressedTextureASTC::supported(*this)) |
| result.append("WEBGL_compressed_texture_astc"_s); |
| if (WebGLDepthTexture::supported(*m_context)) |
| result.append("WEBGL_depth_texture"_s); |
| if (supportsDrawBuffers()) |
| result.append("WEBGL_draw_buffers"_s); |
| if (ANGLEInstancedArrays::supported(*this)) |
| result.append("ANGLE_instanced_arrays"_s); |
| if (m_context->getExtensions().supports("GL_ANGLE_translated_shader_source"_s)) |
| result.append("WEBGL_debug_shaders"_s); |
| result.append("WEBGL_debug_renderer_info"_s); |
| |
| return result; |
| } |
| |
| WebGLAny WebGLRenderingContext::getFramebufferAttachmentParameter(GC3Denum target, GC3Denum attachment, GC3Denum pname) |
| { |
| if (isContextLostOrPending() || !validateFramebufferFuncParameters("getFramebufferAttachmentParameter", target, attachment)) |
| return nullptr; |
| |
| if (!m_framebufferBinding || !m_framebufferBinding->object()) { |
| synthesizeGLError(GraphicsContext3D::INVALID_OPERATION, "getFramebufferAttachmentParameter", "no framebuffer bound"); |
| return nullptr; |
| } |
| |
| auto object = makeRefPtr(m_framebufferBinding->getAttachmentObject(attachment)); |
| if (!object) { |
| if (pname == GraphicsContext3D::FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE) |
| return static_cast<unsigned>(GraphicsContext3D::NONE); |
| // OpenGL ES 2.0 specifies INVALID_ENUM in this case, while desktop GL |
| // specifies INVALID_OPERATION. |
| synthesizeGLError(GraphicsContext3D::INVALID_ENUM, "getFramebufferAttachmentParameter", "invalid parameter name"); |
| return nullptr; |
| } |
| |
| if (object->isTexture()) { |
| switch (pname) { |
| case GraphicsContext3D::FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE: |
| return static_cast<unsigned>(GraphicsContext3D::TEXTURE); |
| case GraphicsContext3D::FRAMEBUFFER_ATTACHMENT_OBJECT_NAME: |
| return makeRefPtr(reinterpret_cast<WebGLTexture&>(*object)); |
| case GraphicsContext3D::FRAMEBUFFER_ATTACHMENT_TEXTURE_LEVEL: |
| case GraphicsContext3D::FRAMEBUFFER_ATTACHMENT_TEXTURE_CUBE_MAP_FACE: |
| case Extensions3D::FRAMEBUFFER_ATTACHMENT_COLOR_ENCODING_EXT: { |
| GC3Dint value = 0; |
| m_context->getFramebufferAttachmentParameteriv(target, attachment, pname, &value); |
| return value; |
| } |
| default: |
| synthesizeGLError(GraphicsContext3D::INVALID_ENUM, "getFramebufferAttachmentParameter", "invalid parameter name for texture attachment"); |
| return nullptr; |
| } |
| } else { |
| ASSERT(object->isRenderbuffer()); |
| switch (pname) { |
| case GraphicsContext3D::FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE: |
| return static_cast<unsigned>(GraphicsContext3D::RENDERBUFFER); |
| case GraphicsContext3D::FRAMEBUFFER_ATTACHMENT_OBJECT_NAME: |
| return makeRefPtr(reinterpret_cast<WebGLRenderbuffer&>(*object)); |
| case Extensions3D::FRAMEBUFFER_ATTACHMENT_COLOR_ENCODING_EXT: { |
| if (!m_extsRGB) { |
| synthesizeGLError(GraphicsContext3D::INVALID_ENUM, "getFramebufferAttachmentParameter", "invalid parameter name for renderbuffer attachment"); |
| return nullptr; |
| } |
| RefPtr<WebGLRenderbuffer> renderBuffer = reinterpret_cast<WebGLRenderbuffer*>(object.get()); |
| GC3Denum renderBufferFormat = renderBuffer->getInternalFormat(); |
| ASSERT(renderBufferFormat != Extensions3D::SRGB_EXT && renderBufferFormat != Extensions3D::SRGB_ALPHA_EXT); |
| if (renderBufferFormat == Extensions3D::SRGB8_ALPHA8_EXT) |
| return static_cast<unsigned>(Extensions3D::SRGB_EXT); |
| return static_cast<unsigned>(GraphicsContext3D::LINEAR); |
| } |
| default: |
| synthesizeGLError(GraphicsContext3D::INVALID_ENUM, "getFramebufferAttachmentParameter", "invalid parameter name for renderbuffer attachment"); |
| return nullptr; |
| } |
| } |
| } |
| |
| bool WebGLRenderingContext::validateFramebufferFuncParameters(const char* functionName, GC3Denum target, GC3Denum attachment) |
| { |
| if (target != GraphicsContext3D::FRAMEBUFFER) { |
| synthesizeGLError(GraphicsContext3D::INVALID_ENUM, functionName, "invalid target"); |
| return false; |
| } |
| // FIXME: Why does this return true unconditionally for COLOR_ATTACHMENT0, |
| // but false for other COLOR_ATTACHMENT values if m_webglDrawBuffers is false? |
| switch (attachment) { |
| case GraphicsContext3D::COLOR_ATTACHMENT0: |
| case GraphicsContext3D::DEPTH_ATTACHMENT: |
| case GraphicsContext3D::STENCIL_ATTACHMENT: |
| case GraphicsContext3D::DEPTH_STENCIL_ATTACHMENT: |
| return true; |
| default: |
| if (m_webglDrawBuffers |
| && attachment >= GraphicsContext3D::COLOR_ATTACHMENT0 |
| && attachment < static_cast<GC3Denum>(GraphicsContext3D::COLOR_ATTACHMENT0 + getMaxColorAttachments())) |
| return true; |
| synthesizeGLError(GraphicsContext3D::INVALID_ENUM, functionName, "invalid attachment"); |
| return false; |
| } |
| } |
| |
| void WebGLRenderingContext::renderbufferStorage(GC3Denum target, GC3Denum internalformat, GC3Dsizei width, GC3Dsizei height) |
| { |
| if (isContextLostOrPending()) |
| return; |
| if (target != GraphicsContext3D::RENDERBUFFER) { |
| synthesizeGLError(GraphicsContext3D::INVALID_ENUM, "renderbufferStorage", "invalid target"); |
| return; |
| } |
| if (!m_renderbufferBinding || !m_renderbufferBinding->object()) { |
| synthesizeGLError(GraphicsContext3D::INVALID_OPERATION, "renderbufferStorage", "no bound renderbuffer"); |
| return; |
| } |
| if (!validateSize("renderbufferStorage", width, height)) |
| return; |
| switch (internalformat) { |
| case GraphicsContext3D::DEPTH_COMPONENT16: |
| case GraphicsContext3D::RGBA4: |
| case GraphicsContext3D::RGB5_A1: |
| case GraphicsContext3D::RGB565: |
| case GraphicsContext3D::STENCIL_INDEX8: |
| case Extensions3D::SRGB8_ALPHA8_EXT: |
| if (internalformat == Extensions3D::SRGB8_ALPHA8_EXT && !m_extsRGB) { |
| synthesizeGLError(GraphicsContext3D::INVALID_ENUM, "renderbufferStorage", "invalid internalformat"); |
| return; |
| } |
| m_context->renderbufferStorage(target, internalformat, width, height); |
| m_renderbufferBinding->setInternalFormat(internalformat); |
| m_renderbufferBinding->setIsValid(true); |
| m_renderbufferBinding->setSize(width, height); |
| break; |
| case GraphicsContext3D::DEPTH_STENCIL: |
| if (isDepthStencilSupported()) |
| m_context->renderbufferStorage(target, Extensions3D::DEPTH24_STENCIL8, width, height); |
| m_renderbufferBinding->setSize(width, height); |
| m_renderbufferBinding->setIsValid(isDepthStencilSupported()); |
| m_renderbufferBinding->setInternalFormat(internalformat); |
| break; |
| default: |
| synthesizeGLError(GraphicsContext3D::INVALID_ENUM, "renderbufferStorage", "invalid internalformat"); |
| return; |
| } |
| applyStencilTest(); |
| } |
| |
| void WebGLRenderingContext::hint(GC3Denum target, GC3Denum mode) |
| { |
| if (isContextLostOrPending()) |
| return; |
| bool isValid = false; |
| switch (target) { |
| case GraphicsContext3D::GENERATE_MIPMAP_HINT: |
| isValid = true; |
| break; |
| case Extensions3D::FRAGMENT_SHADER_DERIVATIVE_HINT_OES: // OES_standard_derivatives |
| if (m_oesStandardDerivatives) |
| isValid = true; |
| break; |
| } |
| if (!isValid) { |
| synthesizeGLError(GraphicsContext3D::INVALID_ENUM, "hint", "invalid target"); |
| return; |
| } |
| m_context->hint(target, mode); |
| } |
| |
| void WebGLRenderingContext::clear(GC3Dbitfield mask) |
| { |
| if (isContextLostOrPending()) |
| return; |
| if (mask & ~(GraphicsContext3D::COLOR_BUFFER_BIT | GraphicsContext3D::DEPTH_BUFFER_BIT | GraphicsContext3D::STENCIL_BUFFER_BIT)) { |
| synthesizeGLError(GraphicsContext3D::INVALID_VALUE, "clear", "invalid mask"); |
| return; |
| } |
| const char* reason = "framebuffer incomplete"; |
| if (m_framebufferBinding && !m_framebufferBinding->onAccess(m_context.get(), &reason)) { |
| synthesizeGLError(GraphicsContext3D::INVALID_FRAMEBUFFER_OPERATION, "clear", reason); |
| return; |
| } |
| if (!clearIfComposited(mask)) |
| m_context->clear(mask); |
| markContextChangedAndNotifyCanvasObserver(); |
| } |
| |
| WebGLAny WebGLRenderingContext::getParameter(GC3Denum pname) |
| { |
| if (isContextLostOrPending()) |
| return nullptr; |
| |
| switch (pname) { |
| case GraphicsContext3D::ACTIVE_TEXTURE: |
| return getUnsignedIntParameter(pname); |
| case GraphicsContext3D::ALIASED_LINE_WIDTH_RANGE: |
| return getWebGLFloatArrayParameter(pname); |
| case GraphicsContext3D::ALIASED_POINT_SIZE_RANGE: |
| return getWebGLFloatArrayParameter(pname); |
| case GraphicsContext3D::ALPHA_BITS: |
| return getIntParameter(pname); |
| case GraphicsContext3D::ARRAY_BUFFER_BINDING: |
| return m_boundArrayBuffer; |
| case GraphicsContext3D::BLEND: |
| return getBooleanParameter(pname); |
| case GraphicsContext3D::BLEND_COLOR: |
| return getWebGLFloatArrayParameter(pname); |
| case GraphicsContext3D::BLEND_DST_ALPHA: |
| return getUnsignedIntParameter(pname); |
| case GraphicsContext3D::BLEND_DST_RGB: |
| return getUnsignedIntParameter(pname); |
| case GraphicsContext3D::BLEND_EQUATION_ALPHA: |
| return getUnsignedIntParameter(pname); |
| case GraphicsContext3D::BLEND_EQUATION_RGB: |
| return getUnsignedIntParameter(pname); |
| case GraphicsContext3D::BLEND_SRC_ALPHA: |
| return getUnsignedIntParameter(pname); |
| case GraphicsContext3D::BLEND_SRC_RGB: |
| return getUnsignedIntParameter(pname); |
| case GraphicsContext3D::BLUE_BITS: |
| return getIntParameter(pname); |
| case GraphicsContext3D::COLOR_CLEAR_VALUE: |
| return getWebGLFloatArrayParameter(pname); |
| case GraphicsContext3D::COLOR_WRITEMASK: |
| return getBooleanArrayParameter(pname); |
| case GraphicsContext3D::COMPRESSED_TEXTURE_FORMATS: |
| return Uint32Array::tryCreate(m_compressedTextureFormats.data(), m_compressedTextureFormats.size()); |
| case GraphicsContext3D::CULL_FACE: |
| return getBooleanParameter(pname); |
| case GraphicsContext3D::CULL_FACE_MODE: |
| return getUnsignedIntParameter(pname); |
| case GraphicsContext3D::CURRENT_PROGRAM: |
| return m_currentProgram; |
| case GraphicsContext3D::DEPTH_BITS: |
| if (!m_framebufferBinding && !m_attributes.depth) |
| return 0; |
| return getIntParameter(pname); |
| case GraphicsContext3D::DEPTH_CLEAR_VALUE: |
| return getFloatParameter(pname); |
| case GraphicsContext3D::DEPTH_FUNC: |
| return getUnsignedIntParameter(pname); |
| case GraphicsContext3D::DEPTH_RANGE: |
| return getWebGLFloatArrayParameter(pname); |
| case GraphicsContext3D::DEPTH_TEST: |
| return getBooleanParameter(pname); |
| case GraphicsContext3D::DEPTH_WRITEMASK: |
| return getBooleanParameter(pname); |
| case GraphicsContext3D::DITHER: |
| return getBooleanParameter(pname); |
| case GraphicsContext3D::ELEMENT_ARRAY_BUFFER_BINDING: |
| return makeRefPtr(m_boundVertexArrayObject->getElementArrayBuffer()); |
| case GraphicsContext3D::FRAMEBUFFER_BINDING: |
| return m_framebufferBinding; |
| case GraphicsContext3D::FRONT_FACE: |
| return getUnsignedIntParameter(pname); |
| case GraphicsContext3D::GENERATE_MIPMAP_HINT: |
| return getUnsignedIntParameter(pname); |
| case GraphicsContext3D::GREEN_BITS: |
| return getIntParameter(pname); |
| case GraphicsContext3D::IMPLEMENTATION_COLOR_READ_FORMAT: |
| return getIntParameter(pname); |
| case GraphicsContext3D::IMPLEMENTATION_COLOR_READ_TYPE: |
| return getIntParameter(pname); |
| case GraphicsContext3D::LINE_WIDTH: |
| return getFloatParameter(pname); |
| case GraphicsContext3D::MAX_COMBINED_TEXTURE_IMAGE_UNITS: |
| return getIntParameter(pname); |
| case GraphicsContext3D::MAX_CUBE_MAP_TEXTURE_SIZE: |
| return getIntParameter(pname); |
| case GraphicsContext3D::MAX_FRAGMENT_UNIFORM_VECTORS: |
| return getIntParameter(pname); |
| case GraphicsContext3D::MAX_RENDERBUFFER_SIZE: |
| return getIntParameter(pname); |
| case GraphicsContext3D::MAX_TEXTURE_IMAGE_UNITS: |
| return getIntParameter(pname); |
| case GraphicsContext3D::MAX_TEXTURE_SIZE: |
| return getIntParameter(pname); |
| case GraphicsContext3D::MAX_VARYING_VECTORS: |
| return getIntParameter(pname); |
| case GraphicsContext3D::MAX_VERTEX_ATTRIBS: |
| return getIntParameter(pname); |
| case GraphicsContext3D::MAX_VERTEX_TEXTURE_IMAGE_UNITS: |
| return getIntParameter(pname); |
| case GraphicsContext3D::MAX_VERTEX_UNIFORM_VECTORS: |
| return getIntParameter(pname); |
| case GraphicsContext3D::MAX_VIEWPORT_DIMS: |
| return getWebGLIntArrayParameter(pname); |
| case GraphicsContext3D::NUM_SHADER_BINARY_FORMATS: |
| return getIntParameter(pname); |
| case GraphicsContext3D::PACK_ALIGNMENT: |
| return getIntParameter(pname); |
| case GraphicsContext3D::POLYGON_OFFSET_FACTOR: |
| return getFloatParameter(pname); |
| case GraphicsContext3D::POLYGON_OFFSET_FILL: |
| return getBooleanParameter(pname); |
| case GraphicsContext3D::POLYGON_OFFSET_UNITS: |
| return getFloatParameter(pname); |
| case GraphicsContext3D::RED_BITS: |
| return getIntParameter(pname); |
| case GraphicsContext3D::RENDERBUFFER_BINDING: |
| return m_renderbufferBinding; |
| case GraphicsContext3D::RENDERER: |
| return "WebKit WebGL"_str; |
| case GraphicsContext3D::SAMPLE_BUFFERS: |
| return getIntParameter(pname); |
| case GraphicsContext3D::SAMPLE_COVERAGE_INVERT: |
| return getBooleanParameter(pname); |
| case GraphicsContext3D::SAMPLE_COVERAGE_VALUE: |
| return getFloatParameter(pname); |
| case GraphicsContext3D::SAMPLES: |
| return getIntParameter(pname); |
| case GraphicsContext3D::SCISSOR_BOX: |
| return getWebGLIntArrayParameter(pname); |
| case GraphicsContext3D::SCISSOR_TEST: |
| return getBooleanParameter(pname); |
| case GraphicsContext3D::SHADING_LANGUAGE_VERSION: |
| return "WebGL GLSL ES 1.0 (" + m_context->getString(GraphicsContext3D::SHADING_LANGUAGE_VERSION) + ")"; |
| case GraphicsContext3D::STENCIL_BACK_FAIL: |
| return getUnsignedIntParameter(pname); |
| case GraphicsContext3D::STENCIL_BACK_FUNC: |
| return getUnsignedIntParameter(pname); |
| case GraphicsContext3D::STENCIL_BACK_PASS_DEPTH_FAIL: |
| return getUnsignedIntParameter(pname); |
| case GraphicsContext3D::STENCIL_BACK_PASS_DEPTH_PASS: |
| return getUnsignedIntParameter(pname); |
| case GraphicsContext3D::STENCIL_BACK_REF: |
| return getIntParameter(pname); |
| case GraphicsContext3D::STENCIL_BACK_VALUE_MASK: |
| return getUnsignedIntParameter(pname); |
| case GraphicsContext3D::STENCIL_BACK_WRITEMASK: |
| return getUnsignedIntParameter(pname); |
| case GraphicsContext3D::STENCIL_BITS: |
| if (!m_framebufferBinding && !m_attributes.stencil) |
| return 0; |
| return getIntParameter(pname); |
| case GraphicsContext3D::STENCIL_CLEAR_VALUE: |
| return getIntParameter(pname); |
| case GraphicsContext3D::STENCIL_FAIL: |
| return getUnsignedIntParameter(pname); |
| case GraphicsContext3D::STENCIL_FUNC: |
| return getUnsignedIntParameter(pname); |
| case GraphicsContext3D::STENCIL_PASS_DEPTH_FAIL: |
| return getUnsignedIntParameter(pname); |
| case GraphicsContext3D::STENCIL_PASS_DEPTH_PASS: |
| return getUnsignedIntParameter(pname); |
| case GraphicsContext3D::STENCIL_REF: |
| return getIntParameter(pname); |
| case GraphicsContext3D::STENCIL_TEST: |
| return getBooleanParameter(pname); |
| case GraphicsContext3D::STENCIL_VALUE_MASK: |
| return getUnsignedIntParameter(pname); |
| case GraphicsContext3D::STENCIL_WRITEMASK: |
| return getUnsignedIntParameter(pname); |
| case GraphicsContext3D::SUBPIXEL_BITS: |
| return getIntParameter(pname); |
| case GraphicsContext3D::TEXTURE_BINDING_2D: |
| return m_textureUnits[m_activeTextureUnit].texture2DBinding; |
| case GraphicsContext3D::TEXTURE_BINDING_CUBE_MAP: |
| return m_textureUnits[m_activeTextureUnit].textureCubeMapBinding; |
| case GraphicsContext3D::UNPACK_ALIGNMENT: |
| return getIntParameter(pname); |
| case GraphicsContext3D::UNPACK_FLIP_Y_WEBGL: |
| return m_unpackFlipY; |
| case GraphicsContext3D::UNPACK_PREMULTIPLY_ALPHA_WEBGL: |
| return m_unpackPremultiplyAlpha; |
| case GraphicsContext3D::UNPACK_COLORSPACE_CONVERSION_WEBGL: |
| return m_unpackColorspaceConversion; |
| case GraphicsContext3D::VENDOR: |
| return "WebKit"_str; |
| case GraphicsContext3D::VERSION: |
| return "WebGL 1.0"_str; |
| case GraphicsContext3D::VIEWPORT: |
| return getWebGLIntArrayParameter(pname); |
| case Extensions3D::FRAGMENT_SHADER_DERIVATIVE_HINT_OES: // OES_standard_derivatives |
| if (m_oesStandardDerivatives) |
| return getUnsignedIntParameter(Extensions3D::FRAGMENT_SHADER_DERIVATIVE_HINT_OES); |
| synthesizeGLError(GraphicsContext3D::INVALID_ENUM, "getParameter", "invalid parameter name, OES_standard_derivatives not enabled"); |
| return nullptr; |
| case WebGLDebugRendererInfo::UNMASKED_RENDERER_WEBGL: |
| if (m_webglDebugRendererInfo) { |
| #if PLATFORM(IOS_FAMILY) |
| return "Apple GPU"_str; |
| #else |
| return m_context->getString(GraphicsContext3D::RENDERER); |
| #endif |
| } |
| synthesizeGLError(GraphicsContext3D::INVALID_ENUM, "getParameter", "invalid parameter name, WEBGL_debug_renderer_info not enabled"); |
| return nullptr; |
| case WebGLDebugRendererInfo::UNMASKED_VENDOR_WEBGL: |
| if (m_webglDebugRendererInfo) |
| return m_context->getString(GraphicsContext3D::VENDOR); |
| synthesizeGLError(GraphicsContext3D::INVALID_ENUM, "getParameter", "invalid parameter name, WEBGL_debug_renderer_info not enabled"); |
| return nullptr; |
| case Extensions3D::VERTEX_ARRAY_BINDING_OES: // OES_vertex_array_object |
| if (m_oesVertexArrayObject) { |
| if (m_boundVertexArrayObject->isDefaultObject()) |
| return nullptr; |
| return makeRefPtr(static_cast<WebGLVertexArrayObjectOES&>(*m_boundVertexArrayObject)); |
| } |
| synthesizeGLError(GraphicsContext3D::INVALID_ENUM, "getParameter", "invalid parameter name, OES_vertex_array_object not enabled"); |
| return nullptr; |
| case Extensions3D::MAX_TEXTURE_MAX_ANISOTROPY_EXT: // EXT_texture_filter_anisotropic |
| if (m_extTextureFilterAnisotropic) |
| return getUnsignedIntParameter(Extensions3D::MAX_TEXTURE_MAX_ANISOTROPY_EXT); |
| synthesizeGLError(GraphicsContext3D::INVALID_ENUM, "getParameter", "invalid parameter name, EXT_texture_filter_anisotropic not enabled"); |
| return nullptr; |
| case Extensions3D::MAX_COLOR_ATTACHMENTS_EXT: // EXT_draw_buffers BEGIN |
| if (m_webglDrawBuffers) |
| return getMaxColorAttachments(); |
| synthesizeGLError(GraphicsContext3D::INVALID_ENUM, "getParameter", "invalid parameter name, WEBGL_draw_buffers not enabled"); |
| return nullptr; |
| case Extensions3D::MAX_DRAW_BUFFERS_EXT: |
| if (m_webglDrawBuffers) |
| return getMaxDrawBuffers(); |
| synthesizeGLError(GraphicsContext3D::INVALID_ENUM, "getParameter", "invalid parameter name, WEBGL_draw_buffers not enabled"); |
| return nullptr; |
| default: |
| if (m_webglDrawBuffers |
| && pname >= Extensions3D::DRAW_BUFFER0_EXT |
| && pname < static_cast<GC3Denum>(Extensions3D::DRAW_BUFFER0_EXT + getMaxDrawBuffers())) { |
| GC3Dint value = GraphicsContext3D::NONE; |
| if (m_framebufferBinding) |
| value = m_framebufferBinding->getDrawBuffer(pname); |
| else // emulated backbuffer |
| value = m_backDrawBuffer; |
| return value; |
| } |
| synthesizeGLError(GraphicsContext3D::INVALID_ENUM, "getParameter", "invalid parameter name"); |
| return nullptr; |
| } |
| } |
| |
| GC3Dint WebGLRenderingContext::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 WebGLRenderingContext::getMaxColorAttachments() |
| { |
| if (!supportsDrawBuffers()) |
| return 0; |
| if (!m_maxColorAttachments) |
| m_context->getIntegerv(Extensions3D::MAX_COLOR_ATTACHMENTS_EXT, &m_maxColorAttachments); |
| return m_maxColorAttachments; |
| } |
| |
| bool WebGLRenderingContext::validateIndexArrayConservative(GC3Denum 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; |
| |
| GC3Dsizeiptr 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); |
| |
| 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 GraphicsContext3D::UNSIGNED_BYTE: { |
| const GC3Dubyte* p = static_cast<const GC3Dubyte*>(buffer->data()); |
| for (GC3Dsizeiptr i = 0; i < numElements; i++) |
| maxIndex = maxIndex ? std::max(maxIndex.value(), static_cast<unsigned>(p[i])) : static_cast<unsigned>(p[i]); |
| break; |
| } |
| case GraphicsContext3D::UNSIGNED_SHORT: { |
| numElements /= sizeof(GC3Dushort); |
| const GC3Dushort* p = static_cast<const GC3Dushort*>(buffer->data()); |
| for (GC3Dsizeiptr i = 0; i < numElements; i++) |
| maxIndex = maxIndex ? std::max(maxIndex.value(), static_cast<unsigned>(p[i])) : static_cast<unsigned>(p[i]); |
| break; |
| } |
| case GraphicsContext3D::UNSIGNED_INT: { |
| if (!m_oesElementIndexUint) |
| return false; |
| numElements /= sizeof(GC3Duint); |
| const GC3Duint* p = static_cast<const GC3Duint*>(buffer->data()); |
| for (GC3Dsizeiptr 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, GC3Denum mode) |
| { |
| switch (mode) { |
| case GraphicsContext3D::FUNC_ADD: |
| case GraphicsContext3D::FUNC_SUBTRACT: |
| case GraphicsContext3D::FUNC_REVERSE_SUBTRACT: |
| case Extensions3D::MIN_EXT: |
| case Extensions3D::MAX_EXT: |
| if ((mode == Extensions3D::MIN_EXT || mode == Extensions3D::MAX_EXT) && !m_extBlendMinMax) { |
| synthesizeGLError(GraphicsContext3D::INVALID_ENUM, functionName, "invalid mode"); |
| return false; |
| } |
| return true; |
| break; |
| default: |
| synthesizeGLError(GraphicsContext3D::INVALID_ENUM, functionName, "invalid mode"); |
| return false; |
| } |
| } |
| |
| bool WebGLRenderingContext::validateCapability(const char* functionName, GC3Denum cap) |
| { |
| switch (cap) { |
| case GraphicsContext3D::BLEND: |
| case GraphicsContext3D::CULL_FACE: |
| case GraphicsContext3D::DEPTH_TEST: |
| case GraphicsContext3D::DITHER: |
| case GraphicsContext3D::POLYGON_OFFSET_FILL: |
| case GraphicsContext3D::SAMPLE_ALPHA_TO_COVERAGE: |
| case GraphicsContext3D::SAMPLE_COVERAGE: |
| case GraphicsContext3D::SCISSOR_TEST: |
| case GraphicsContext3D::STENCIL_TEST: |
| return true; |
| default: |
| synthesizeGLError(GraphicsContext3D::INVALID_ENUM, functionName, "invalid capability"); |
| return false; |
| } |
| } |
| |
| } // namespace WebCore |
| |
| #endif // ENABLE(WEBGL) |
