| // 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. |
| |
| #include "cc/resources/tiling_set_raster_queue_required.h" |
| |
| #include <utility> |
| |
| #include "cc/resources/picture_layer_tiling_set.h" |
| #include "cc/resources/tile.h" |
| #include "cc/resources/tile_priority.h" |
| |
| namespace cc { |
| |
| TilingSetRasterQueueRequired::TilingSetRasterQueueRequired( |
| PictureLayerTilingSet* tiling_set, |
| RasterTilePriorityQueue::Type type) |
| : type_(type) { |
| DCHECK_NE(static_cast<int>(type), |
| static_cast<int>(RasterTilePriorityQueue::Type::ALL)); |
| |
| // Any type of required tile would only come from a high resolution tiling. |
| // The functions that determine this value is |
| // PictureLayerTiling::IsTileRequiredFor*, which all return false if the |
| // resolution is not HIGH_RESOLUTION. |
| PictureLayerTiling* tiling = |
| tiling_set->FindTilingWithResolution(HIGH_RESOLUTION); |
| // If we don't have a high res tiling, then this queue will yield no tiles. |
| // See PictureLayerImpl::CanHaveTilings for examples of when a HIGH_RESOLUTION |
| // tiling would not be generated. |
| if (!tiling) |
| return; |
| |
| iterator_ = TilingIterator(tiling, &tiling->tiling_data_); |
| while (!iterator_.done() && !IsTileRequired(*iterator_)) |
| ++iterator_; |
| } |
| |
| TilingSetRasterQueueRequired::~TilingSetRasterQueueRequired() { |
| } |
| |
| bool TilingSetRasterQueueRequired::IsEmpty() const { |
| return iterator_.done(); |
| } |
| |
| void TilingSetRasterQueueRequired::Pop() { |
| DCHECK(!IsEmpty()); |
| ++iterator_; |
| while (!iterator_.done() && !IsTileRequired(*iterator_)) |
| ++iterator_; |
| } |
| |
| Tile* TilingSetRasterQueueRequired::Top() { |
| DCHECK(!IsEmpty()); |
| return *iterator_; |
| } |
| |
| const Tile* TilingSetRasterQueueRequired::Top() const { |
| DCHECK(!IsEmpty()); |
| return *iterator_; |
| } |
| |
| bool TilingSetRasterQueueRequired::IsTileRequired(const Tile* tile) const { |
| return (type_ == RasterTilePriorityQueue::Type::REQUIRED_FOR_ACTIVATION && |
| tile->required_for_activation()) || |
| (type_ == RasterTilePriorityQueue::Type::REQUIRED_FOR_DRAW && |
| tile->required_for_draw()); |
| } |
| |
| TilingSetRasterQueueRequired::TilingIterator::TilingIterator() |
| : tiling_(nullptr), current_tile_(nullptr) { |
| } |
| |
| TilingSetRasterQueueRequired::TilingIterator::TilingIterator( |
| PictureLayerTiling* tiling, |
| TilingData* tiling_data) |
| : tiling_(tiling), tiling_data_(tiling_data), current_tile_(nullptr) { |
| if (!tiling_->has_visible_rect_tiles()) { |
| // Verify that if we would create the iterator, then it would be empty (ie |
| // it would return false when evaluated as a bool). |
| DCHECK(!TilingData::Iterator(tiling_data_, tiling->current_visible_rect(), |
| false)); |
| return; |
| } |
| |
| visible_iterator_ = |
| TilingData::Iterator(tiling_data_, tiling_->current_visible_rect(), |
| false /* include_borders */); |
| if (!visible_iterator_) |
| return; |
| |
| current_tile_ = |
| tiling_->TileAt(visible_iterator_.index_x(), visible_iterator_.index_y()); |
| |
| // If this is a valid tile, return it. Note that we have to use a tiling check |
| // for occlusion, since the tile's internal state has not yet been updated. |
| if (current_tile_ && current_tile_->NeedsRaster() && |
| !tiling_->IsTileOccluded(current_tile_)) { |
| tiling_->UpdateTileAndTwinPriority(current_tile_); |
| return; |
| } |
| ++(*this); |
| } |
| |
| TilingSetRasterQueueRequired::TilingIterator::~TilingIterator() { |
| } |
| |
| TilingSetRasterQueueRequired::TilingIterator& |
| TilingSetRasterQueueRequired::TilingIterator:: |
| operator++() { |
| while (true) { |
| ++visible_iterator_; |
| if (!visible_iterator_) { |
| current_tile_ = nullptr; |
| return *this; |
| } |
| std::pair<int, int> next_index = visible_iterator_.index(); |
| current_tile_ = tiling_->TileAt(next_index.first, next_index.second); |
| // If the tile doesn't exist or if it exists but doesn't need raster work, |
| // we can move on to the next tile. |
| if (!current_tile_ || !current_tile_->NeedsRaster()) |
| continue; |
| |
| // If the tile is occluded, we also can skip it. Note that we use the tiling |
| // check for occlusion, since tile's internal state has not yet been updated |
| // (by UpdateTileAndTwinPriority). The tiling check does not rely on tile's |
| // internal state (it is, in fact, used to determine the tile's state). |
| if (tiling_->IsTileOccluded(current_tile_)) |
| continue; |
| |
| // If we get here, that means we have a valid tile that needs raster and is |
| // in the NOW bin, which means that it can be required. |
| break; |
| } |
| |
| if (current_tile_) |
| tiling_->UpdateTileAndTwinPriority(current_tile_); |
| return *this; |
| } |
| |
| } // namespace cc |