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1 /* | 1 /* |
2 * Copyright 2010 Google Inc. | 2 * Copyright 2010 Google Inc. |
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 "SkImageInfo.h" | 8 #include "SkImageInfo.h" |
9 #include "SkReadBuffer.h" | 9 #include "SkReadBuffer.h" |
10 #include "SkWriteBuffer.h" | 10 #include "SkWriteBuffer.h" |
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31 | 31 |
32 void SkImageInfo::flatten(SkWriteBuffer& buffer) const { | 32 void SkImageInfo::flatten(SkWriteBuffer& buffer) const { |
33 buffer.write32(fWidth); | 33 buffer.write32(fWidth); |
34 buffer.write32(fHeight); | 34 buffer.write32(fHeight); |
35 | 35 |
36 SkASSERT(0 == (fAlphaType & ~0xFF)); | 36 SkASSERT(0 == (fAlphaType & ~0xFF)); |
37 SkASSERT(0 == (fColorType & ~0xFF)); | 37 SkASSERT(0 == (fColorType & ~0xFF)); |
38 uint32_t packed = (fAlphaType << 8) | fColorType; | 38 uint32_t packed = (fAlphaType << 8) | fColorType; |
39 buffer.write32(packed); | 39 buffer.write32(packed); |
40 } | 40 } |
| 41 |
| 42 bool SkColorTypeValidateAlphaType(SkColorType colorType, SkAlphaType alphaType, |
| 43 SkAlphaType* canonical) { |
| 44 switch (colorType) { |
| 45 case kUnknown_SkColorType: |
| 46 alphaType = kIgnore_SkAlphaType; |
| 47 break; |
| 48 case kAlpha_8_SkColorType: |
| 49 if (kUnpremul_SkAlphaType == alphaType) { |
| 50 alphaType = kPremul_SkAlphaType; |
| 51 } |
| 52 // fall-through |
| 53 case kIndex_8_SkColorType: |
| 54 case kARGB_4444_SkColorType: |
| 55 case kRGBA_8888_SkColorType: |
| 56 case kBGRA_8888_SkColorType: |
| 57 if (kIgnore_SkAlphaType == alphaType) { |
| 58 return false; |
| 59 } |
| 60 break; |
| 61 case kRGB_565_SkColorType: |
| 62 alphaType = kOpaque_SkAlphaType; |
| 63 break; |
| 64 default: |
| 65 return false; |
| 66 } |
| 67 if (canonical) { |
| 68 *canonical = alphaType; |
| 69 } |
| 70 return true; |
| 71 } |
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