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// Copyright 2014 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_TILES_TILING_SET_RASTER_QUEUE_REQUIRED_H_
#define CC_TILES_TILING_SET_RASTER_QUEUE_REQUIRED_H_
#include "cc/base/cc_export.h"
#include "cc/tiles/picture_layer_tiling_set.h"
#include "cc/tiles/raster_tile_priority_queue.h"
#include "cc/tiles/tile.h"
namespace cc {
// This queue only returns tiles that are required for either activation or
// draw, as specified by RasterTilePriorityQueue::Type passed in the
// constructor.
class CC_EXPORT TilingSetRasterQueueRequired {
public:
TilingSetRasterQueueRequired(PictureLayerTilingSet* tiling_set,
RasterTilePriorityQueue::Type type);
~TilingSetRasterQueueRequired();
const PrioritizedTile& Top() const;
void Pop();
bool IsEmpty() const;
private:
// This iterator will return all tiles that are in the NOW bin on the given
// tiling. The queue can then use these tiles and further filter them based on
// whether they are required or not.
class TilingIterator {
public:
TilingIterator();
explicit TilingIterator(PictureLayerTiling* tiling,
TilingData* tiling_data,
const gfx::Rect& rect);
~TilingIterator();
bool done() const { return !current_tile_.tile(); }
const PrioritizedTile& operator*() const { return current_tile_; }
TilingIterator& operator++();
private:
PictureLayerTiling* tiling_;
TilingData* tiling_data_;
PrioritizedTile current_tile_;
TilingData::Iterator visible_iterator_;
};
bool IsTileRequired(const PrioritizedTile& prioritized_tile) const;
TilingIterator iterator_;
RasterTilePriorityQueue::Type type_;
};
} // namespace cc
#endif // CC_TILES_TILING_SET_RASTER_QUEUE_REQUIRED_H_
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