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// 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_BITMAP_CONTENT_LAYER_UPDATER_H_
#define CC_RESOURCES_BITMAP_CONTENT_LAYER_UPDATER_H_
#include "cc/base/cc_export.h"
#include "cc/resources/content_layer_updater.h"
#include "skia/ext/refptr.h"
#include "third_party/skia/include/core/SkBitmap.h"
class SkCanvas;
namespace cc {
class LayerPainter;
class RenderingStatsInstrumenation;
// This class rasterizes the content_rect into a skia bitmap canvas. It then
// updates textures by copying from the canvas into the texture, using
// MapSubImage if possible.
class CC_EXPORT BitmapContentLayerUpdater : public ContentLayerUpdater {
public:
class Resource : public LayerUpdater::Resource {
public:
Resource(BitmapContentLayerUpdater* updater,
scoped_ptr<PrioritizedResource> resource);
virtual ~Resource();
virtual void Update(ResourceUpdateQueue* queue,
gfx::Rect source_rect,
gfx::Vector2d dest_offset,
bool partial_update) OVERRIDE;
private:
BitmapContentLayerUpdater* updater_;
DISALLOW_COPY_AND_ASSIGN(Resource);
};
static scoped_refptr<BitmapContentLayerUpdater> Create(
scoped_ptr<LayerPainter> painter,
RenderingStatsInstrumentation* stats_instrumenation,
int layer_id);
virtual scoped_ptr<LayerUpdater::Resource> CreateResource(
PrioritizedResourceManager* manager) OVERRIDE;
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 UpdateTexture(ResourceUpdateQueue* queue,
PrioritizedResource* resource,
gfx::Rect source_rect,
gfx::Vector2d dest_offset,
bool partial_update);
virtual void SetOpaque(bool opaque) OVERRIDE;
virtual void ReduceMemoryUsage() OVERRIDE;
protected:
BitmapContentLayerUpdater(
scoped_ptr<LayerPainter> painter,
RenderingStatsInstrumentation* stats_instrumenation,
int layer_id);
virtual ~BitmapContentLayerUpdater();
SkBitmap bitmap_backing_;
skia::RefPtr<SkCanvas> canvas_;
gfx::Size canvas_size_;
bool opaque_;
private:
DISALLOW_COPY_AND_ASSIGN(BitmapContentLayerUpdater);
};
} // namespace cc
#endif // CC_RESOURCES_BITMAP_CONTENT_LAYER_UPDATER_H_
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