Fixing performance issue of creating imagebitmap from ImageData

third_party/WebKit/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 23 matching lines @@
 #include "platform/graphics/ImageBuffer.h"
 
 #include "GrContext.h"
 #include "platform/MIMETypeRegistry.h"
 #include "platform/geometry/IntRect.h"
 #include "platform/graphics/GraphicsContext.h"
 #include "platform/graphics/GraphicsTypes3D.h"
 #include "platform/graphics/ImageBufferClient.h"
 #include "platform/graphics/StaticBitmapImage.h"
 #include "platform/graphics/UnacceleratedImageBufferSurface.h"
+#include "platform/graphics/UnacceleratedSimpleImageBufferSurface.h"
 #include "platform/graphics/gpu/DrawingBuffer.h"
 #include "platform/graphics/gpu/Extensions3DUtil.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"
@@ skipping 14 matching lines @@
 }
 
 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()));
 }
 
+PassOwnPtr<ImageBuffer> ImageBuffer::createSimple(const IntSize& size, OpacityMode opacityMode)
+{
+    OwnPtr<ImageBufferSurface> surface(adoptPtr(new UnacceleratedSimpleImageBufferSurface(size, opacityMode)));
+    if (!surface->isValid())
+        return nullptr;
+    return adoptPtr(new ImageBuffer(surface.release()));
+}
+
 ImageBuffer::ImageBuffer(PassOwnPtr<ImageBufferSurface> surface)
     : m_snapshotState(InitialSnapshotState)
     , m_surface(surface)
     , m_client(0)
 {
     m_surface->setImageBuffer(this);
 }
 
 ImageBuffer::~ImageBuffer()
 {
@@ skipping 288 matching lines @@
     ASSERT(MIMETypeRegistry::isSupportedImageMIMETypeForEncoding(mimeType));
 
     Vector<char> encodedImage;
     if (!encodeImage(mimeType, quality, &encodedImage))
         return "data:,";
 
     return "data:" + mimeType + ";base64," + base64Encode(encodedImage);
 }
 
 } // namespace blink