Cancel GPU acceleration for 2D canvas when drawing very large images

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 420 matching lines @@
     }
 
     virtual ~UnacceleratedSurfaceFactory() { }
 };
 
 void ImageBuffer::disableAcceleration()
 {
     if (!isAccelerated())
         return;
 
-    // Get current frame.
-    SkImage* image = m_surface->newImageSnapshot(PreferNoAcceleration, SnapshotReasonPaint).get();
+    sk_sp<SkImage> image = m_surface->newImageSnapshot(PreferNoAcceleration, SnapshotReasonPaint);
+    // Using a GPU-backed image with RecordingImageBufferSurface
+    // will fail at playback time.
+    image = image->makeNonTextureImage();
 
     // Create and configure a recording (unaccelerated) surface.
     std::unique_ptr<RecordingImageBufferFallbackSurfaceFactory> surfaceFactory = wrapUnique(new UnacceleratedSurfaceFactory());
     std::unique_ptr<ImageBufferSurface> surface = wrapUnique(new RecordingImageBufferSurface(m_surface->size(), std::move(surfaceFactory), m_surface->getOpacityMode(), m_surface->colorSpace()));
-    surface->canvas()->drawImage(image, 0, 0);
+    surface->canvas()->drawImage(image.get(), 0, 0);
     surface->setImageBuffer(this);
-
-    // Replace the current surface with the new surface.
+    if (m_client)
+        m_client->restoreCanvasMatrixClipStack(surface->canvas());
     m_surface = std::move(surface);
 
     didDisableAcceleration();
 }
 
 bool ImageDataBuffer::encodeImage(const String& mimeType, const double& quality, Vector<unsigned char>* encodedImage) const
 {
     if (mimeType == "image/jpeg") {
         if (!JPEGImageEncoder::encode(*this, quality, encodedImage))
             return false;
@@ skipping 17 matching lines @@
     ASSERT(MIMETypeRegistry::isSupportedImageMIMETypeForEncoding(mimeType));
 
     Vector<unsigned char> result;
     if (!encodeImage(mimeType, quality, &result))
         return "data:,";
 
     return "data:" + mimeType + ";base64," + base64Encode(result);
 }
 
 } // namespace blink