Initial implementation of display list backed 2D canvases

Source/platform/graphics/ImageBuffer.cpp

 /*
  * Copyright (c) 2008, Google Inc. All rights reserved.
  * Copyright (C) 2009 Dirk Schulze <krit@webkit.org>
  * 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:
  *
  *     * Redistributions of source code must retain the above copyright
@@ skipping 34 matching lines @@
 #include "platform/graphics/gpu/Extensions3DUtil.h"
 #include "platform/graphics/skia/NativeImageSkia.h"
 #include "platform/graphics/skia/SkiaUtils.h"
 #include "platform/image-encoders/skia/JPEGImageEncoder.h"
 #include "platform/image-encoders/skia/PNGImageEncoder.h"
 #include "platform/image-encoders/skia/WEBPImageEncoder.h"
 #include "public/platform/Platform.h"
 #include "public/platform/WebExternalTextureMailbox.h"
 #include "public/platform/WebGraphicsContext3D.h"
 #include "public/platform/WebGraphicsContext3DProvider.h"
+#include "third_party/skia/include/core/SkPicture.h"
 #include "third_party/skia/include/effects/SkTableColorFilter.h"
 #include "wtf/MathExtras.h"
 #include "wtf/text/Base64.h"
 #include "wtf/text/WTFString.h"
 
 using namespace std;
 
 namespace blink {
 
 PassOwnPtr<ImageBuffer> ImageBuffer::create(PassOwnPtr<ImageBufferSurface> surface)
 {
     if (!surface->isValid())
         return nullptr;
     return adoptPtr(new ImageBuffer(surface));
 }
 
 PassOwnPtr<ImageBuffer> ImageBuffer::create(const IntSize& size, OpacityMode opacityMode)
 {
     OwnPtr<ImageBufferSurface> surface = adoptPtr(new UnacceleratedImageBufferSurface(size, opacityMode));
     if (!surface->isValid())
         return nullptr;
     return adoptPtr(new ImageBuffer(surface.release()));
 }
 
 ImageBuffer::ImageBuffer(PassOwnPtr<ImageBufferSurface> surface)
     : m_surface(surface)
     , m_client(0)
 {
-    m_surface->setImageBuffer(this);
     if (m_surface->canvas()) {
         m_context = adoptPtr(new GraphicsContext(m_surface->canvas()));
         m_context->setCertainlyOpaque(m_surface->opacityMode() == Opaque);
         m_context->setAccelerated(m_surface->isAccelerated());
     }
+    m_surface->setImageBuffer(this);
 }
 
 ImageBuffer::~ImageBuffer()
 {
 }
 
 GraphicsContext* ImageBuffer::context() const
 {
     if (!isSurfaceValid())
         return 0;
@@ skipping 136 matching lines @@
     return drawingBuffer->copyToPlatformTexture(context3D, tex, GL_RGBA,
         GL_UNSIGNED_BYTE, 0, true, false, fromFrontBuffer);
 }
 
 void ImageBuffer::draw(GraphicsContext* context, const FloatRect& destRect, const FloatRect* srcPtr, CompositeOperator op)
 {
     if (!isSurfaceValid())
         return;
 
     FloatRect srcRect = srcPtr ? *srcPtr : FloatRect(FloatPoint(), size());
+    RefPtr<SkPicture> picture = m_surface->getPicture();
+    if (picture) {
+        context->drawPicture(picture.release(), destRect, srcRect, op, blink::WebBlendModeNormal);
+        return;
+    }
+
     SkBitmap bitmap = m_surface->bitmap();
     // For ImageBufferSurface that enables cachedBitmap, Use the cached Bitmap for CPU side usage
     // if it is available, otherwise generate and use it.
     if (!context->isAccelerated() && m_surface->isAccelerated() && m_surface->cachedBitmapEnabled() && isSurfaceValid()) {
         m_surface->updateCachedBitmapIfNeeded();
         bitmap = m_surface->cachedBitmap();
     }
 
     RefPtr<Image> image = BitmapImage::create(NativeImageSkia::create(drawNeedsCopy(m_context.get(), context) ? deepSkBitmapCopy(bitmap) : bitmap));
 
@@ skipping 160 matching lines @@
     if (!encodeImage(imageData, mimeType, quality, &encodedImage))
         return "data:,";
 
     Vector<char> base64Data;
     base64Encode(encodedImage, base64Data);
 
     return "data:" + mimeType + ";base64," + base64Data;
 }
 
 } // namespace blink