| /* |
| * Copyright 2018 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| |
| #ifndef GrGradientBitmapCache_DEFINED |
| #define GrGradientBitmapCache_DEFINED |
| |
| #include "include/core/SkBitmap.h" |
| #include "include/private/SkColorData.h" |
| #include "include/private/base/SkMutex.h" |
| #include "include/private/base/SkNoncopyable.h" |
| |
| class GrGradientBitmapCache : SkNoncopyable { |
| public: |
| GrGradientBitmapCache(int maxEntries, int resolution); |
| ~GrGradientBitmapCache(); |
| |
| // Assumes colors are compatible with the specified alphaType (e.g. if it's premul then colors |
| // are already premultiplied). Thread safe. |
| void getGradient(const SkPMColor4f* colors, const SkScalar* positions, int count, |
| SkColorType colorType, SkAlphaType alphaType, SkBitmap* bitmap); |
| |
| private: |
| SkMutex fMutex; |
| |
| int fEntryCount; |
| const int fMaxEntries; |
| const int fResolution; |
| |
| struct Entry; |
| mutable Entry* fHead; |
| mutable Entry* fTail; |
| |
| inline Entry* release(Entry*) const; |
| inline void attachToHead(Entry*) const; |
| |
| bool find(const void* buffer, size_t len, SkBitmap*) const; |
| void add(const void* buffer, size_t len, const SkBitmap&); |
| |
| void fillGradient(const SkPMColor4f* colors, const SkScalar* positions, int count, |
| SkBitmap* bitmap); |
| |
| #ifdef SK_DEBUG |
| void validate() const; |
| #else |
| void validate() const {} |
| #endif |
| |
| class AutoValidate : SkNoncopyable { |
| public: |
| AutoValidate(const GrGradientBitmapCache* bc) : fBC(bc) { bc->validate(); } |
| ~AutoValidate() { fBC->validate(); } |
| private: |
| const GrGradientBitmapCache* fBC; |
| }; |
| }; |
| |
| #endif |