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+// Copyright 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef CC_PLAYBACK_IMAGE_HIJACK_CANVAS_H_
+#define CC_PLAYBACK_IMAGE_HIJACK_CANVAS_H_
+
+#include "base/macros.h"
+#include "third_party/skia/include/core/SkCanvas.h"
+#include "third_party/skia/include/utils/SkNWayCanvas.h"
+
+namespace cc {
+
+class ImageDecodeController;
+
+// TODO(vmpstr): Convert this to SkCanvas override and plumb through the raster
+// pipeline.
+class ImageHijackCanvas : public SkNWayCanvas {
+ public:
+ ImageHijackCanvas(int width,
+ int height,
+ ImageDecodeController* image_decode_controller);
+
+ private:
+ // Ensure that pictures are unpacked by this canvas, instead of being
+ // forwarded to the raster canvas.
+ void onDrawPicture(const SkPicture* picture,
+ const SkMatrix* matrix,
+ const SkPaint* paint) override;
+
+ void onDrawImage(const SkImage* image,
+ SkScalar x,
+ SkScalar y,
+ const SkPaint* paint) override;
+ void onDrawImageRect(const SkImage* image,
+ const SkRect* src,
+ const SkRect& dst,
+ const SkPaint* paint,
+ SrcRectConstraint constraint) override;
+ void onDrawImageNine(const SkImage* image,
+ const SkIRect& center,
+ const SkRect& dst,
+ const SkPaint* paint) override;
+
+ ImageDecodeController* image_decode_controller_;
+
+ DISALLOW_COPY_AND_ASSIGN(ImageHijackCanvas);
+};
+
+} // namespace cc
+
+#endif // CC_PLAYBACK_IMAGE_HIJACK_CANVAS_H_