1 files changed, 44 insertions, 0 deletions
diff --git a/cc/picture_pile_impl.h b/cc/picture_pile_impl.h
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+++ b/cc/picture_pile_impl.h
@@ -0,0 +1,44 @@
+// Copyright 2012 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_PICTURE_PILE_IMPL_H_
+#define CC_PICTURE_PILE_IMPL_H_
+
+#include "base/basictypes.h"
+#include "base/memory/ref_counted.h"
+#include "cc/cc_export.h"
+#include "cc/picture.h"
+#include "cc/scoped_ptr_vector.h"
+#include "ui/gfx/rect.h"
+
+namespace cc {
+class PicturePile;
+
+class CC_EXPORT PicturePileImpl : public base::RefCounted<PicturePileImpl> {
+public:
+  static scoped_refptr<PicturePileImpl> Create();
+
+  // Clone a paint-safe version of this picture.
+  scoped_refptr<PicturePileImpl> CloneForDrawing() const;
+
+  // Raster a subrect of this PicturePileImpl into the given canvas.
+  // It's only safe to call paint on a cloned version.
+  // It is assumed that contentsScale has already been applied to this canvas.
+  void Raster(SkCanvas* canvas, gfx::Rect rect);
+
+private:
+  friend class PicturePile;
+
+  PicturePileImpl();
+  ~PicturePileImpl();
+
+  std::vector<scoped_refptr<Picture> > pile_;
+
+  friend class base::RefCounted<PicturePileImpl>;
+  DISALLOW_COPY_AND_ASSIGN(PicturePileImpl);
+};
+
+}  // namespace cc
+
+#endif  // CC_PICTURE_PILE_IMPL_H_