1 files changed, 53 insertions, 0 deletions
diff --git a/chromium/cc/resources/skpicture_content_layer_updater.h b/chromium/cc/resources/skpicture_content_layer_updater.h
new file mode 100644
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+++ b/chromium/cc/resources/skpicture_content_layer_updater.h
@@ -0,0 +1,53 @@
+// Copyright 2011 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_RESOURCES_SKPICTURE_CONTENT_LAYER_UPDATER_H_
+#define CC_RESOURCES_SKPICTURE_CONTENT_LAYER_UPDATER_H_
+
+#include "cc/resources/content_layer_updater.h"
+#include "third_party/skia/include/core/SkPicture.h"
+
+class SkCanvas;
+
+namespace cc {
+
+class LayerPainter;
+
+// This class records the content_rect into an SkPicture. Subclasses, provide
+// different implementations of tile updating based on this recorded picture.
+// The BitmapSkPictureContentLayerUpdater and
+// FrameBufferSkPictureContentLayerUpdater are two examples of such
+// implementations.
+class SkPictureContentLayerUpdater : public ContentLayerUpdater {
+ public:
+  virtual void SetOpaque(bool opaque) OVERRIDE;
+
+ protected:
+  SkPictureContentLayerUpdater(
+      scoped_ptr<LayerPainter> painter,
+      RenderingStatsInstrumentation* stats_instrumentation,
+      int layer_id);
+  virtual ~SkPictureContentLayerUpdater();
+
+  virtual void PrepareToUpdate(gfx::Rect content_rect,
+                               gfx::Size tile_size,
+                               float contents_width_scale,
+                               float contents_height_scale,
+                               gfx::Rect* resulting_opaque_rect) OVERRIDE;
+  void DrawPicture(SkCanvas* canvas);
+
+  bool layer_is_opaque() const { return layer_is_opaque_; }
+
+ private:
+  // Recording canvas.
+  SkPicture picture_;
+  // True when it is known that all output pixels will be opaque.
+  bool layer_is_opaque_;
+
+  DISALLOW_COPY_AND_ASSIGN(SkPictureContentLayerUpdater);
+};
+
+}  // namespace cc
+
+#endif  // CC_RESOURCES_SKPICTURE_CONTENT_LAYER_UPDATER_H_