Disables software to accelerated canvas update on Linux AMD GPUs

third_party/WebKit/Source/core/html/HTMLCanvasElement.cpp

 /*
  * Copyright (C) 2004, 2006, 2007 Apple Inc. All rights reserved.
  * Copyright (C) 2007 Alp Toker <alp@atoker.com>
  * Copyright (C) 2010 Torch Mobile (Beijing) Co. Ltd. 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.
@@ skipping 56 matching lines @@
 #include "platform/Histogram.h"
 #include "platform/RuntimeEnabledFeatures.h"
 #include "platform/graphics/Canvas2DImageBufferSurface.h"
 #include "platform/graphics/CanvasMetrics.h"
 #include "platform/graphics/ExpensiveCanvasHeuristicParameters.h"
 #include "platform/graphics/ImageBuffer.h"
 #include "platform/graphics/RecordingImageBufferSurface.h"
 #include "platform/graphics/StaticBitmapImage.h"
 #include "platform/graphics/UnacceleratedImageBufferSurface.h"
 #include "platform/graphics/gpu/AcceleratedImageBufferSurface.h"
+#include "platform/graphics/gpu/SharedGpuContext.h"
 #include "platform/graphics/paint/PaintCanvas.h"
 #include "platform/image-encoders/ImageEncoderUtils.h"
 #include "platform/transforms/AffineTransform.h"
 #include "platform/wtf/CheckedNumeric.h"
 #include "platform/wtf/PtrUtil.h"
 #include "public/platform/Platform.h"
 #include "public/platform/WebTraceLocation.h"
 #include "v8/include/v8.h"
 
 namespace blink {
@@ skipping 1146 matching lines @@
 }
 
 void HTMLCanvasElement::DidMoveToNewDocument(Document& old_document) {
   ContextLifecycleObserver::SetContext(&GetDocument());
   PageVisibilityObserver::SetContext(GetDocument().GetPage());
   HTMLElement::DidMoveToNewDocument(old_document);
 }
 
 void HTMLCanvasElement::WillDrawImageTo2DContext(CanvasImageSource* source) {
   if (ExpensiveCanvasHeuristicParameters::kEnableAccelerationToAvoidReadbacks &&
+      SharedGpuContext::AllowSoftwareToAcceleratedCanvasUpgrade() &&
       source->IsAccelerated() && !Buffer()->IsAccelerated() &&
       ShouldAccelerate(kIgnoreResourceLimitCriteria)) {
     OpacityMode opacity_mode =
         context_->CreationAttributes().alpha() ? kNonOpaque : kOpaque;
     int msaa_sample_count = 0;
     std::unique_ptr<ImageBufferSurface> surface =
         CreateAcceleratedImageBufferSurface(opacity_mode, &msaa_sample_count);
     if (surface) {
       Buffer()->SetSurface(std::move(surface));
       SetNeedsCompositingUpdate();
@@ skipping 224 matching lines @@
     // Creates a placeholder layer first before Surface is created.
     surface_layer_bridge_->CreateSolidColorLayer();
   }
 }
 
 void HTMLCanvasElement::OnWebLayerReplaced() {
   SetNeedsCompositingUpdate();
 }
 
 }  // namespace blink