Adding Blink bindings for WebGL 2

Source/core/html/canvas/WebGLRenderingContext.cpp

 /*
  * Copyright (C) 2009 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
@@ skipping 44 matching lines @@
 #include "core/html/canvas/WebGLLoseContext.h"
 #include "core/loader/FrameLoader.h"
 #include "core/loader/FrameLoaderClient.h"
 #include "core/rendering/RenderBox.h"
 #include "platform/CheckedInt.h"
 #include "platform/graphics/gpu/DrawingBuffer.h"
 #include "public/platform/Platform.h"
 
 namespace blink {
 
-static bool shouldFailContextCreationForTesting = false;
-
 PassOwnPtrWillBeRawPtr<WebGLRenderingContext> WebGLRenderingContext::create(HTMLCanvasElement* canvas, const CanvasContextCreationAttributes& attrs)
 {
-    Document& document = canvas->document();
-    LocalFrame* frame = document.frame();
-    if (!frame) {
-        canvas->dispatchEvent(WebGLContextEvent::create(EventTypeNames::webglcontextcreationerror, false, true, "Web page was not allowed to create a WebGL context."));
+    WebGLContextAttributes attributes = toWebGLContextAttributes(attrs);
+    OwnPtr<blink::WebGraphicsContext3D> context(createWebGraphicsContext3D(canvas, attributes, 1));
+    if (!context)
         return nullptr;
-    }
-    Settings* settings = frame->settings();
-
-    // 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(settings && settings->webGLEnabled())) {
-        canvas->dispatchEvent(WebGLContextEvent::create(EventTypeNames::webglcontextcreationerror, false, true, "Web page was not allowed to create a WebGL context."));
-        return nullptr;
-    }
-
-    WebGLContextAttributes attributes = toWebGLContextAttributes(attrs);
-    blink::WebGraphicsContext3D::Attributes wgc3dAttributes = toWebGraphicsContext3DAttributes(attributes, document.topDocument().url().string(), settings, 1);
-    blink::WebGLInfo glInfo;
-    OwnPtr<blink::WebGraphicsContext3D> context = adoptPtr(blink::Platform::current()->createOffscreenGraphicsContext3D(wgc3dAttributes, 0, &glInfo));
-    if (!context || shouldFailContextCreationForTesting) {
-        shouldFailContextCreationForTesting = false;
-        String statusMessage;
-        if (!glInfo.contextInfoCollectionFailure.isEmpty()) {
-            statusMessage.append("Could not create a WebGL context. ");
-            statusMessage.append(glInfo.contextInfoCollectionFailure);
-        } else {
-            statusMessage.append("Could not create a WebGL context");
-            if (!glInfo.vendorInfo.isEmpty()) {
-                statusMessage.append(" VendorInfo = ");
-                statusMessage.append(glInfo.vendorInfo);
-            } else {
-                statusMessage.append(" VendorInfo = Not Available");
-            }
-            if (!glInfo.rendererInfo.isEmpty()) {
-                statusMessage.append(", RendererInfo = ");
-                statusMessage.append(glInfo.rendererInfo);
-            } else {
-                statusMessage.append(", RendererInfo = Not Available");
-            }
-            if (!glInfo.driverVersion.isEmpty()) {
-                statusMessage.append(", DriverInfo = ");
-                statusMessage.append(glInfo.driverVersion);
-            } else {
-                statusMessage.append(", DriverInfo = Not Available");
-            }
-            statusMessage.append(".");
-        }
-        canvas->dispatchEvent(WebGLContextEvent::create(EventTypeNames::webglcontextcreationerror, false, true, statusMessage));
-        return nullptr;
-    }
-
     OwnPtr<Extensions3DUtil> extensionsUtil = Extensions3DUtil::create(context.get());
     if (!extensionsUtil)
         return nullptr;
     if (extensionsUtil->supportsExtension("GL_EXT_debug_marker")) {
         String contextLabel(String::format("WebGLRenderingContext-%p", context.get()));
         context->pushGroupMarkerEXT(contextLabel.ascii().data());
     }
 
     OwnPtrWillBeRawPtr<WebGLRenderingContext> renderingContext = adoptPtrWillBeNoop(new WebGLRenderingContext(canvas, context.release(), attributes));
     renderingContext->registerContextExtensions();
@@ skipping 67 matching lines @@
     visitor->trace(m_webglDebugShaders);
     visitor->trace(m_webglDrawBuffers);
     visitor->trace(m_webglCompressedTextureATC);
     visitor->trace(m_webglCompressedTextureETC1);
     visitor->trace(m_webglCompressedTexturePVRTC);
     visitor->trace(m_webglCompressedTextureS3TC);
     visitor->trace(m_webglDepthTexture);
     WebGLRenderingContextBase::trace(visitor);
 }
 
-void WebGLRenderingContext::forceNextWebGLContextCreationToFail()
-{
-    shouldFailContextCreationForTesting = true;
-}
-
 } // namespace blink