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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_LAYER_TILING_DATA_H_
#define CC_RESOURCES_LAYER_TILING_DATA_H_
#include <utility>
#include "base/basictypes.h"
#include "base/memory/scoped_ptr.h"
#include "cc/base/cc_export.h"
#include "cc/base/hash_pair.h"
#include "cc/base/region.h"
#include "cc/base/scoped_ptr_hash_map.h"
#include "cc/base/tiling_data.h"
#include "ui/gfx/rect.h"
namespace cc {
class CC_EXPORT LayerTilingData {
public:
enum BorderTexelOption {
HAS_BORDER_TEXELS,
NO_BORDER_TEXELS
};
~LayerTilingData();
static scoped_ptr<LayerTilingData> Create(gfx::Size tile_size,
BorderTexelOption option);
bool has_empty_bounds() const { return tiling_data_.has_empty_bounds(); }
int num_tiles_x() const { return tiling_data_.num_tiles_x(); }
int num_tiles_y() const { return tiling_data_.num_tiles_y(); }
gfx::Rect tile_bounds(int i, int j) const {
return tiling_data_.TileBounds(i, j);
}
gfx::Vector2d texture_offset(int x_index, int y_index) const {
return tiling_data_.TextureOffset(x_index, y_index);
}
// Change the tile size. This may invalidate all the existing tiles.
void SetTileSize(gfx::Size size);
gfx::Size tile_size() const;
// Change the border texel setting. This may invalidate all existing tiles.
void SetBorderTexelOption(BorderTexelOption option);
bool has_border_texels() const { return !!tiling_data_.border_texels(); }
bool is_empty() const { return has_empty_bounds() || !tiles().size(); }
const LayerTilingData& operator=(const LayerTilingData&);
class Tile {
public:
Tile() : i_(-1), j_(-1) {}
virtual ~Tile() {}
int i() const { return i_; }
int j() const { return j_; }
void move_to(int i, int j) {
i_ = i;
j_ = j;
}
gfx::Rect opaque_rect() const { return opaque_rect_; }
void set_opaque_rect(gfx::Rect opaque_rect) { opaque_rect_ = opaque_rect; }
private:
int i_;
int j_;
gfx::Rect opaque_rect_;
DISALLOW_COPY_AND_ASSIGN(Tile);
};
typedef std::pair<int, int> TileMapKey;
typedef ScopedPtrHashMap<TileMapKey, Tile> TileMap;
void AddTile(scoped_ptr<Tile> tile, int i, int j);
scoped_ptr<Tile> TakeTile(int i, int j);
Tile* TileAt(int i, int j) const;
const TileMap& tiles() const { return tiles_; }
void SetBounds(gfx::Size size);
gfx::Size bounds() const { return tiling_data_.total_size(); }
void ContentRectToTileIndices(gfx::Rect rect,
int* left,
int* top,
int* right,
int* bottom) const;
gfx::Rect TileRect(const Tile* tile) const;
Region OpaqueRegionInContentRect(gfx::Rect rect) const;
void reset() { tiles_.clear(); }
protected:
LayerTilingData(gfx::Size tile_size, BorderTexelOption option);
TileMap tiles_;
TilingData tiling_data_;
DISALLOW_COPY(LayerTilingData);
};
} // namespace cc
#endif // CC_RESOURCES_LAYER_TILING_DATA_H_
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