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 SkImageFilterCacheKey_DEFINED
9 #define SkImageFilterCacheKey_DEFINED
10 
11 struct SkImageFilter::Cache::Key {
KeyKey12     Key(const uint32_t uniqueID, const SkMatrix& matrix,
13         const SkIRect& clipBounds, uint32_t srcGenID, const SkIRect& srcSubset)
14         : fUniqueID(uniqueID)
15         , fMatrix(matrix)
16         , fClipBounds(clipBounds)
17         , fSrcGenID(srcGenID)
18         , fSrcSubset(srcSubset) {
19         // Assert that Key is tightly-packed, since it is hashed.
20         static_assert(sizeof(Key) == sizeof(uint32_t) + sizeof(SkMatrix) + sizeof(SkIRect) +
21                                      sizeof(uint32_t) + 4 * sizeof(int32_t),
22                                      "image_filter_key_tight_packing");
23         fMatrix.getType();  // force initialization of type, so hashes match
24     }
25 
26     uint32_t fUniqueID;
27     SkMatrix fMatrix;
28     SkIRect fClipBounds;
29     uint32_t fSrcGenID;
30     SkIRect fSrcSubset;
31 
32     bool operator==(const Key& other) const {
33         return fUniqueID == other.fUniqueID &&
34                fMatrix == other.fMatrix &&
35                fClipBounds == other.fClipBounds &&
36                fSrcGenID == other.fSrcGenID &&
37                fSrcSubset == other.fSrcSubset;
38     }
39 };
40 
41 #endif
42 
43