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// Copyright 2013 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_PICTURE_PILE_BASE_H_
#define CC_RESOURCES_PICTURE_PILE_BASE_H_
#include <bitset>
#include <list>
#include <utility>
#include "base/containers/hash_tables.h"
#include "base/memory/ref_counted.h"
#include "cc/base/cc_export.h"
#include "cc/base/region.h"
#include "cc/base/tiling_data.h"
#include "cc/resources/picture.h"
#include "ui/gfx/size.h"
namespace base {
class Value;
}
namespace cc {
class CC_EXPORT PicturePileBase : public base::RefCounted<PicturePileBase> {
public:
PicturePileBase();
explicit PicturePileBase(const PicturePileBase* other);
PicturePileBase(const PicturePileBase* other, unsigned thread_index);
void SetTilingRect(const gfx::Rect& tiling_rect);
gfx::Rect tiling_rect() const { return tiling_.tiling_rect(); }
void SetMinContentsScale(float min_contents_scale);
// If non-empty, all pictures tiles inside this rect are recorded. There may
// be recordings outside this rect, but everything inside the rect is
// recorded.
gfx::Rect recorded_viewport() const { return recorded_viewport_; }
int num_tiles_x() const { return tiling_.num_tiles_x(); }
int num_tiles_y() const { return tiling_.num_tiles_y(); }
gfx::Rect tile_bounds(int x, int y) const { return tiling_.TileBounds(x, y); }
bool HasRecordingAt(int x, int y);
bool CanRaster(float contents_scale, const gfx::Rect& content_rect);
// If this pile contains any valid recordings. May have false positives.
bool HasRecordings() const { return has_any_recordings_; }
static void ComputeTileGridInfo(const gfx::Size& tile_grid_size,
SkTileGridFactory::TileGridInfo* info);
void SetTileGridSize(const gfx::Size& tile_grid_size);
TilingData& tiling() { return tiling_; }
scoped_ptr<base::Value> AsValue() const;
protected:
class CC_EXPORT PictureInfo {
public:
enum {
INVALIDATION_FRAMES_TRACKED = 32
};
PictureInfo();
~PictureInfo();
bool Invalidate(int frame_number);
bool NeedsRecording(int frame_number, int distance_to_visible);
PictureInfo CloneForThread(int thread_index) const;
void SetPicture(scoped_refptr<Picture> picture);
Picture* GetPicture() const;
float GetInvalidationFrequencyForTesting() const {
return GetInvalidationFrequency();
}
private:
void AdvanceInvalidationHistory(int frame_number);
float GetInvalidationFrequency() const;
int last_frame_number_;
scoped_refptr<Picture> picture_;
std::bitset<INVALIDATION_FRAMES_TRACKED> invalidation_history_;
};
typedef std::pair<int, int> PictureMapKey;
typedef base::hash_map<PictureMapKey, PictureInfo> PictureMap;
virtual ~PicturePileBase();
int buffer_pixels() const { return tiling_.border_texels(); }
void Clear();
gfx::Rect PaddedRect(const PictureMapKey& key);
gfx::Rect PadRect(const gfx::Rect& rect);
// An internal CanRaster check that goes to the picture_map rather than
// using the recorded_viewport hint.
bool CanRasterSlowTileCheck(const gfx::Rect& layer_rect) const;
// A picture pile is a tiled set of pictures. The picture map is a map of tile
// indices to picture infos.
PictureMap picture_map_;
TilingData tiling_;
gfx::Rect recorded_viewport_;
float min_contents_scale_;
SkTileGridFactory::TileGridInfo tile_grid_info_;
SkColor background_color_;
int slow_down_raster_scale_factor_for_debug_;
bool contents_opaque_;
bool contents_fill_bounds_completely_;
bool show_debug_picture_borders_;
bool clear_canvas_with_debug_color_;
// A hint about whether there are any recordings. This may be a false
// positive.
bool has_any_recordings_;
private:
void SetBufferPixels(int buffer_pixels);
friend class base::RefCounted<PicturePileBase>;
DISALLOW_COPY_AND_ASSIGN(PicturePileBase);
};
} // namespace cc
#endif // CC_RESOURCES_PICTURE_PILE_BASE_H_
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