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// Copyright (c) 2010 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 CHROME_BROWSER_RENDERER_HOST_BACKING_STORE_MAC_H_
#define CHROME_BROWSER_RENDERER_HOST_BACKING_STORE_MAC_H_
#include "base/basictypes.h"
#include "base/scoped_cftyperef.h"
#include "chrome/browser/renderer_host/backing_store.h"
class BackingStoreMac : public BackingStore {
public:
BackingStoreMac(RenderWidgetHost* widget, const gfx::Size& size);
virtual ~BackingStoreMac();
// A CGLayer that stores the contents of the backing store, cached in GPU
// memory if possible.
CGLayerRef cg_layer() { return cg_layer_; }
// A CGBitmapContext that stores the contents of the backing store if the
// corresponding Cocoa view has not been inserted into an NSWindow yet.
CGContextRef cg_bitmap() { return cg_bitmap_; }
// BackingStore implementation.
virtual void PaintToBackingStore(
RenderProcessHost* process,
TransportDIB::Id bitmap,
const gfx::Rect& bitmap_rect,
const std::vector<gfx::Rect>& copy_rects,
bool* painted_synchronously);
virtual bool CopyFromBackingStore(const gfx::Rect& rect,
skia::PlatformCanvas* output);
virtual void ScrollBackingStore(int dx, int dy,
const gfx::Rect& clip_rect,
const gfx::Size& view_size);
private:
// Creates a CGLayer associated with its owner view's window's graphics
// context, sized properly for the backing store. Returns NULL if the owner
// is not in a window with a CGContext. cg_layer_ is assigned this method's
// result.
CGLayerRef CreateCGLayer();
// Creates a CGBitmapContext sized properly for the backing store. The
// owner view need not be in a window. cg_bitmap_ is assigned this method's
// result.
CGContextRef CreateCGBitmapContext();
scoped_cftyperef<CGContextRef> cg_bitmap_;
scoped_cftyperef<CGLayerRef> cg_layer_;
DISALLOW_COPY_AND_ASSIGN(BackingStoreMac);
};
#endif // CHROME_BROWSER_RENDERER_HOST_BACKING_STORE_MAC_H_
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