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1 /* | 1 /* |
2 * Copyright 2015 The Android Open Source Project | 2 * Copyright 2015 The Android Open Source Project |
3 * | 3 * |
4 * Use of this source code is governed by a BSD-style license that can be | 4 * Use of this source code is governed by a BSD-style license that can be |
5 * found in the LICENSE file. | 5 * found in the LICENSE file. |
6 */ | 6 */ |
7 | 7 |
8 #include "SkGifInterlaceIter.h" | 8 #include "SkGifInterlaceIter.h" |
9 | 9 |
10 static const uint8_t kStartingInterlaceYValues[] = { 0, 4, 2, 1 }; | 10 static const uint8_t kStartingInterlaceYValues[] = { 0, 4, 2, 1 }; |
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21 void SkGifInterlaceIter::prepareY() { | 21 void SkGifInterlaceIter::prepareY() { |
22 int32_t y = fCurrY + fDeltaY; | 22 int32_t y = fCurrY + fDeltaY; |
23 | 23 |
24 // Iterate through fStartYPtr until a valid row is found. | 24 // Iterate through fStartYPtr until a valid row is found. |
25 // This ensures that we do not move past the height of the small images. | 25 // This ensures that we do not move past the height of the small images. |
26 while (y >= fHeight) { | 26 while (y >= fHeight) { |
27 if (kStartingInterlaceYValues + | 27 if (kStartingInterlaceYValues + |
28 SK_ARRAY_COUNT(kStartingInterlaceYValues) == fStartYPtr) { | 28 SK_ARRAY_COUNT(kStartingInterlaceYValues) == fStartYPtr) { |
29 // Now we have iterated over the entire image. Forbid any | 29 // Now we have iterated over the entire image. Forbid any |
30 // subsequent calls to nextY(). | 30 // subsequent calls to nextY(). |
31 SkDEBUGCODE(fStartYPtr = NULL;) | 31 SkDEBUGCODE(fStartYPtr = nullptr;) |
32 SkDEBUGCODE(fDeltaYPtr = NULL;) | 32 SkDEBUGCODE(fDeltaYPtr = nullptr;) |
33 y = 0; | 33 y = 0; |
34 } else { | 34 } else { |
35 y = *fStartYPtr++; | 35 y = *fStartYPtr++; |
36 fDeltaY = *fDeltaYPtr++; | 36 fDeltaY = *fDeltaYPtr++; |
37 } | 37 } |
38 } | 38 } |
39 fCurrY = y; | 39 fCurrY = y; |
40 } | 40 } |
41 | 41 |
42 int32_t SkGifInterlaceIter::nextY() { | 42 int32_t SkGifInterlaceIter::nextY() { |
43 SkASSERT(fStartYPtr); | 43 SkASSERT(fStartYPtr); |
44 SkASSERT(fDeltaYPtr); | 44 SkASSERT(fDeltaYPtr); |
45 int32_t y = fCurrY; | 45 int32_t y = fCurrY; |
46 prepareY(); | 46 prepareY(); |
47 return y; | 47 return y; |
48 } | 48 } |
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