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// Copyright (c) 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 CONTENT_RENDERER_BROWSER_PLUGIN_BROWSER_PLUGIN_BACKING_STORE_H__
#define CONTENT_RENDERER_BROWSER_PLUGIN_BROWSER_PLUGIN_BACKING_STORE_H__
#include <vector>
#include "base/memory/scoped_ptr.h"
#include "third_party/skia/include/core/SkBitmap.h"
#include "ui/gfx/size.h"
#include "ui/gfx/vector2d.h"
class SkCanvas;
class TransportDIB;
namespace gfx {
class Canvas;
class Point;
class Rect;
}
namespace content {
// The BrowserPluginBackingStore is a wrapper around an SkBitmap that is used
// in the software rendering path of the browser plugin. The backing store has
// two write operations:
// 1. PaintToBackingStore copies pixel regions to the bitmap.
// 2. ScrollBackingStore scrolls a region of the bitmap by dx, and dy.
// These are called in response to changes in the guest relayed via
// BrowserPluginMsg_UpdateRect. See BrowserPlugin::UpdateRect.
class BrowserPluginBackingStore {
public:
BrowserPluginBackingStore(const gfx::Size& size, float scale_factor);
virtual ~BrowserPluginBackingStore();
void PaintToBackingStore(
const gfx::Rect& bitmap_rect,
const std::vector<gfx::Rect>& copy_rects,
void* bitmap);
void ScrollBackingStore(const gfx::Vector2d& delta,
const gfx::Rect& clip_rect,
const gfx::Size& view_size);
void Clear(SkColor clear_color);
const gfx::Size& GetSize() const { return size_; }
const SkBitmap& GetBitmap() const { return bitmap_; }
float GetScaleFactor() const { return scale_factor_; }
private:
gfx::Size size_;
SkBitmap bitmap_;
scoped_ptr<SkCanvas> canvas_;
float scale_factor_;
DISALLOW_COPY_AND_ASSIGN(BrowserPluginBackingStore);
};
} // namespace content
#endif // CONTENT_RENDERER_BROWSER_PLUGIN_BROWSER_PLUGIN_BACKING_STORE_H__
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