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// Copyright 2015 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "modules/webgl/WebGL2RenderingContext.h"
#include "bindings/modules/v8/OffscreenCanvasRenderingContext2DOrWebGLRenderingContextOrWebGL2RenderingContext.h"
#include "bindings/modules/v8/RenderingContext.h"
#include "core/frame/LocalFrame.h"
#include "core/frame/Settings.h"
#include "core/loader/FrameLoader.h"
#include "core/loader/FrameLoaderClient.h"
#include "gpu/command_buffer/client/gles2_interface.h"
#include "modules/webgl/EXTColorBufferFloat.h"
#include "modules/webgl/EXTDisjointTimerQueryWebGL2.h"
#include "modules/webgl/EXTTextureFilterAnisotropic.h"
#include "modules/webgl/OESTextureFloatLinear.h"
#include "modules/webgl/WebGLCompressedTextureASTC.h"
#include "modules/webgl/WebGLCompressedTextureATC.h"
#include "modules/webgl/WebGLCompressedTextureETC.h"
#include "modules/webgl/WebGLCompressedTextureETC1.h"
#include "modules/webgl/WebGLCompressedTexturePVRTC.h"
#include "modules/webgl/WebGLCompressedTextureS3TC.h"
#include "modules/webgl/WebGLCompressedTextureS3TCsRGB.h"
#include "modules/webgl/WebGLContextAttributeHelpers.h"
#include "modules/webgl/WebGLContextEvent.h"
#include "modules/webgl/WebGLDebugRendererInfo.h"
#include "modules/webgl/WebGLDebugShaders.h"
#include "modules/webgl/WebGLGetBufferSubDataAsync.h"
#include "modules/webgl/WebGLLoseContext.h"
#include "platform/graphics/gpu/DrawingBuffer.h"
#include "public/platform/Platform.h"
#include "public/platform/WebGraphicsContext3DProvider.h"
#include <memory>
namespace blink {
// An helper function for the two create() methods. The return value is an
// indicate of whether the create() should return nullptr or not.
static bool shouldCreateContext(WebGraphicsContext3DProvider* contextProvider,
HTMLCanvasElement* canvas,
OffscreenCanvas* offscreenCanvas) {
if (!contextProvider) {
if (canvas) {
canvas->dispatchEvent(WebGLContextEvent::create(
EventTypeNames::webglcontextcreationerror, false, true,
"Failed to create a WebGL2 context."));
} else {
offscreenCanvas->dispatchEvent(WebGLContextEvent::create(
EventTypeNames::webglcontextcreationerror, false, true,
"Failed to create a WebGL2 context."));
}
return false;
}
gpu::gles2::GLES2Interface* gl = contextProvider->contextGL();
std::unique_ptr<Extensions3DUtil> extensionsUtil =
Extensions3DUtil::create(gl);
if (!extensionsUtil)
return false;
if (extensionsUtil->supportsExtension("GL_EXT_debug_marker")) {
String contextLabel(
String::format("WebGL2RenderingContext-%p", contextProvider));
gl->PushGroupMarkerEXT(0, contextLabel.ascii().data());
}
return true;
}
CanvasRenderingContext* WebGL2RenderingContext::Factory::create(
HTMLCanvasElement* canvas,
const CanvasContextCreationAttributes& attrs,
Document&) {
std::unique_ptr<WebGraphicsContext3DProvider> contextProvider(
createWebGraphicsContext3DProvider(canvas, attrs, 2));
if (!shouldCreateContext(contextProvider.get(), canvas, nullptr))
return nullptr;
WebGL2RenderingContext* renderingContext =
new WebGL2RenderingContext(canvas, std::move(contextProvider), attrs);
if (!renderingContext->drawingBuffer()) {
canvas->dispatchEvent(WebGLContextEvent::create(
EventTypeNames::webglcontextcreationerror, false, true,
"Could not create a WebGL2 context."));
return nullptr;
}
renderingContext->initializeNewContext();
renderingContext->registerContextExtensions();
return renderingContext;
}
CanvasRenderingContext* WebGL2RenderingContext::Factory::create(
ScriptState* scriptState,
OffscreenCanvas* offscreenCanvas,
const CanvasContextCreationAttributes& attrs) {
std::unique_ptr<WebGraphicsContext3DProvider> contextProvider(
createWebGraphicsContext3DProvider(scriptState, attrs, 2));
if (!shouldCreateContext(contextProvider.get(), nullptr, offscreenCanvas))
return nullptr;
WebGL2RenderingContext* renderingContext = new WebGL2RenderingContext(
offscreenCanvas, std::move(contextProvider), attrs);
if (!renderingContext->drawingBuffer()) {
offscreenCanvas->dispatchEvent(WebGLContextEvent::create(
EventTypeNames::webglcontextcreationerror, false, true,
"Could not create a WebGL2 context."));
return nullptr;
}
renderingContext->initializeNewContext();
renderingContext->registerContextExtensions();
return renderingContext;
}
void WebGL2RenderingContext::Factory::onError(HTMLCanvasElement* canvas,
const String& error) {
canvas->dispatchEvent(WebGLContextEvent::create(
EventTypeNames::webglcontextcreationerror, false, true, error));
}
WebGL2RenderingContext::WebGL2RenderingContext(
HTMLCanvasElement* passedCanvas,
std::unique_ptr<WebGraphicsContext3DProvider> contextProvider,
const CanvasContextCreationAttributes& requestedAttributes)
: WebGL2RenderingContextBase(passedCanvas,
std::move(contextProvider),
requestedAttributes) {}
WebGL2RenderingContext::WebGL2RenderingContext(
OffscreenCanvas* passedOffscreenCanvas,
std::unique_ptr<WebGraphicsContext3DProvider> contextProvider,
const CanvasContextCreationAttributes& requestedAttributes)
: WebGL2RenderingContextBase(passedOffscreenCanvas,
std::move(contextProvider),
requestedAttributes) {}
void WebGL2RenderingContext::setCanvasGetContextResult(
RenderingContext& result) {
result.setWebGL2RenderingContext(this);
}
void WebGL2RenderingContext::setOffscreenCanvasGetContextResult(
OffscreenRenderingContext& result) {
result.setWebGL2RenderingContext(this);
}
ImageBitmap* WebGL2RenderingContext::transferToImageBitmap(
ScriptState* scriptState) {
NOTIMPLEMENTED();
return nullptr;
}
void WebGL2RenderingContext::registerContextExtensions() {
// Register extensions.
registerExtension<EXTColorBufferFloat>(m_extColorBufferFloat);
registerExtension<EXTDisjointTimerQueryWebGL2>(m_extDisjointTimerQueryWebGL2);
registerExtension<EXTTextureFilterAnisotropic>(m_extTextureFilterAnisotropic);
registerExtension<OESTextureFloatLinear>(m_oesTextureFloatLinear);
registerExtension<WebGLCompressedTextureASTC>(m_webglCompressedTextureASTC);
registerExtension<WebGLCompressedTextureATC>(m_webglCompressedTextureATC);
registerExtension<WebGLCompressedTextureETC>(m_webglCompressedTextureETC);
registerExtension<WebGLCompressedTextureETC1>(m_webglCompressedTextureETC1);
registerExtension<WebGLCompressedTexturePVRTC>(m_webglCompressedTexturePVRTC);
registerExtension<WebGLCompressedTextureS3TC>(m_webglCompressedTextureS3TC);
registerExtension<WebGLCompressedTextureS3TCsRGB>(
m_webglCompressedTextureS3TCsRGB, DraftExtension);
registerExtension<WebGLDebugRendererInfo>(m_webglDebugRendererInfo);
registerExtension<WebGLDebugShaders>(m_webglDebugShaders);
registerExtension<WebGLGetBufferSubDataAsync>(m_webglGetBufferSubDataAsync,
DraftExtension);
registerExtension<WebGLLoseContext>(m_webglLoseContext);
}
DEFINE_TRACE(WebGL2RenderingContext) {
visitor->trace(m_extColorBufferFloat);
visitor->trace(m_extDisjointTimerQueryWebGL2);
visitor->trace(m_extTextureFilterAnisotropic);
visitor->trace(m_oesTextureFloatLinear);
visitor->trace(m_webglCompressedTextureASTC);
visitor->trace(m_webglCompressedTextureATC);
visitor->trace(m_webglCompressedTextureETC);
visitor->trace(m_webglCompressedTextureETC1);
visitor->trace(m_webglCompressedTexturePVRTC);
visitor->trace(m_webglCompressedTextureS3TC);
visitor->trace(m_webglCompressedTextureS3TCsRGB);
visitor->trace(m_webglDebugRendererInfo);
visitor->trace(m_webglDebugShaders);
visitor->trace(m_webglGetBufferSubDataAsync);
visitor->trace(m_webglLoseContext);
WebGL2RenderingContextBase::trace(visitor);
}
DEFINE_TRACE_WRAPPERS(WebGL2RenderingContext) {
// Extensions are managed by WebGL2RenderingContextBase.
WebGL2RenderingContextBase::traceWrappers(visitor);
}
} // namespace blink
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