| // Copyright 2013 The Flutter 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 FLUTTER_FLOW_RASTER_CACHE_KEY_H_ |
| #define FLUTTER_FLOW_RASTER_CACHE_KEY_H_ |
| |
| #include <unordered_map> |
| #include "flutter/flow/matrix_decomposition.h" |
| #include "flutter/fml/logging.h" |
| |
| namespace flutter { |
| |
| template <typename ID> |
| class RasterCacheKey { |
| public: |
| RasterCacheKey(ID id, const SkMatrix& ctm) : id_(id), matrix_(ctm) { |
| matrix_[SkMatrix::kMTransX] = SkScalarFraction(ctm.getTranslateX()); |
| matrix_[SkMatrix::kMTransY] = SkScalarFraction(ctm.getTranslateY()); |
| #ifndef SUPPORT_FRACTIONAL_TRANSLATION |
| FML_DCHECK(matrix_.getTranslateX() == 0 && matrix_.getTranslateY() == 0); |
| #endif |
| } |
| |
| ID id() const { return id_; } |
| const SkMatrix& matrix() const { return matrix_; } |
| |
| struct Hash { |
| uint32_t operator()(RasterCacheKey const& key) const { |
| return std::hash<ID>()(key.id_); |
| } |
| }; |
| |
| struct Equal { |
| constexpr bool operator()(const RasterCacheKey& lhs, |
| const RasterCacheKey& rhs) const { |
| return lhs.id_ == rhs.id_ && lhs.matrix_ == rhs.matrix_; |
| } |
| }; |
| |
| template <class Value> |
| using Map = std::unordered_map<RasterCacheKey, Value, Hash, Equal>; |
| |
| private: |
| ID id_; |
| |
| // ctm where only fractional (0-1) translations are preserved: |
| // matrix_ = ctm; |
| // matrix_[SkMatrix::kMTransX] = SkScalarFraction(ctm.getTranslateX()); |
| // matrix_[SkMatrix::kMTransY] = SkScalarFraction(ctm.getTranslateY()); |
| SkMatrix matrix_; |
| }; |
| |
| // The ID is the uint32_t picture uniqueID |
| using PictureRasterCacheKey = RasterCacheKey<uint32_t>; |
| |
| class Layer; |
| |
| // The ID is the uint64_t layer unique_id |
| using LayerRasterCacheKey = RasterCacheKey<uint64_t>; |
| |
| } // namespace flutter |
| |
| #endif // FLUTTER_FLOW_RASTER_CACHE_KEY_H_ |