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| 1 /* |
| 2 * Copyright 2016 Google Inc. |
| 3 * |
| 4 * Use of this source code is governed by a BSD-style license that can be |
| 5 * found in the LICENSE file. |
| 6 */ |
| 7 |
| 8 #ifndef SkImageFilterCache_DEFINED |
| 9 #define SkImageFilterCache_DEFINED |
| 10 |
| 11 #include "SkMatrix.h" |
| 12 #include "SkRefCnt.h" |
| 13 |
| 14 struct SkIPoint; |
| 15 class SkSpecialImage; |
| 16 |
| 17 struct SkImageFilterCacheKey { |
| 18 SkImageFilterCacheKey(const uint32_t uniqueID, const SkMatrix& matrix, |
| 19 const SkIRect& clipBounds, uint32_t srcGenID, const SkIRect& srcSubset) |
| 20 : fUniqueID(uniqueID) |
| 21 , fMatrix(matrix) |
| 22 , fClipBounds(clipBounds) |
| 23 , fSrcGenID(srcGenID) |
| 24 , fSrcSubset(srcSubset) { |
| 25 // Assert that Key is tightly-packed, since it is hashed. |
| 26 static_assert(sizeof(SkImageFilterCacheKey) == sizeof(uint32_t) + sizeof
(SkMatrix) + |
| 27 sizeof(SkIRect) + sizeof(uint32_t) + 4 * si
zeof(int32_t), |
| 28 "image_filter_key_tight_packing"); |
| 29 fMatrix.getType(); // force initialization of type, so hashes match |
| 30 } |
| 31 |
| 32 uint32_t fUniqueID; |
| 33 SkMatrix fMatrix; |
| 34 SkIRect fClipBounds; |
| 35 uint32_t fSrcGenID; |
| 36 SkIRect fSrcSubset; |
| 37 |
| 38 bool operator==(const SkImageFilterCacheKey& other) const { |
| 39 return fUniqueID == other.fUniqueID && |
| 40 fMatrix == other.fMatrix && |
| 41 fClipBounds == other.fClipBounds && |
| 42 fSrcGenID == other.fSrcGenID && |
| 43 fSrcSubset == other.fSrcSubset; |
| 44 } |
| 45 }; |
| 46 |
| 47 // This cache maps from (filter's unique ID + CTM + clipBounds + src bitmap gene
ration ID) to |
| 48 // (result, offset). |
| 49 class SkImageFilterCache : public SkRefCnt { |
| 50 public: |
| 51 virtual ~SkImageFilterCache() {} |
| 52 static SkImageFilterCache* Create(size_t maxBytes); |
| 53 static SkImageFilterCache* Get(); |
| 54 virtual SkSpecialImage* get(const SkImageFilterCacheKey& key, SkIPoint* offs
et) const = 0; |
| 55 virtual void set(const SkImageFilterCacheKey& key, SkSpecialImage* image, |
| 56 const SkIPoint& offset) = 0; |
| 57 virtual void purge() = 0; |
| 58 virtual void purgeByKeys(const SkImageFilterCacheKey[], int) = 0; |
| 59 SkDEBUGCODE(virtual int count() const = 0;) |
| 60 }; |
| 61 |
| 62 #endif |
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