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1 | 1 |
2 /* | 2 /* |
3 * Copyright 2011 Google Inc. | 3 * Copyright 2011 Google Inc. |
4 * | 4 * |
5 * Use of this source code is governed by a BSD-style license that can be | 5 * Use of this source code is governed by a BSD-style license that can be |
6 * found in the LICENSE file. | 6 * found in the LICENSE file. |
7 */ | 7 */ |
8 #ifndef SkScaledBitmapSampler_DEFINED | 8 #ifndef SkScaledBitmapSampler_DEFINED |
9 #define SkScaledBitmapSampler_DEFINED | 9 #define SkScaledBitmapSampler_DEFINED |
10 | 10 |
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27 | 27 |
28 enum SrcConfig { | 28 enum SrcConfig { |
29 kGray, // 1 byte per pixel | 29 kGray, // 1 byte per pixel |
30 kIndex, // 1 byte per pixel | 30 kIndex, // 1 byte per pixel |
31 kRGB, // 3 bytes per pixel | 31 kRGB, // 3 bytes per pixel |
32 kRGBX, // 4 byes per pixel (ignore 4th) | 32 kRGBX, // 4 byes per pixel (ignore 4th) |
33 kRGBA, // 4 bytes per pixel | 33 kRGBA, // 4 bytes per pixel |
34 kRGB_565 // 2 bytes per pixel | 34 kRGB_565 // 2 bytes per pixel |
35 }; | 35 }; |
36 | 36 |
| 37 struct Options { |
| 38 bool fDither; |
| 39 bool fPremultiplyAlpha; |
| 40 bool fSkipZeros; |
| 41 explicit Options(const SkImageDecoder &dec) |
| 42 : fDither(dec.getDitherImage()) |
| 43 , fPremultiplyAlpha(!dec.getRequireUnpremultipliedColors()) |
| 44 , fSkipZeros(dec.getSkipWritingZeroes()) |
| 45 { } |
| 46 }; |
| 47 |
37 // Given a dst bitmap (with pixels already allocated) and a src-config, | 48 // Given a dst bitmap (with pixels already allocated) and a src-config, |
38 // prepares iterator to process the src colors and write them into dst. | 49 // prepares iterator to process the src colors and write them into dst. |
39 // Returns false if the request cannot be fulfulled. | 50 // Returns false if the request cannot be fulfulled. |
40 bool begin(SkBitmap* dst, SrcConfig sc, const SkImageDecoder& decoder, | 51 bool begin(SkBitmap* dst, SrcConfig sc, const SkImageDecoder& decoder, |
41 const SkPMColor* = NULL); | 52 const SkPMColor* = NULL); |
| 53 bool begin(SkBitmap* dst, SrcConfig sc, const Options& opts, |
| 54 const SkPMColor* = NULL); |
42 // call with row of src pixels, for y = 0...scaledHeight-1. | 55 // call with row of src pixels, for y = 0...scaledHeight-1. |
43 // returns true if the row had non-opaque alpha in it | 56 // returns true if the row had non-opaque alpha in it |
44 bool next(const uint8_t* SK_RESTRICT src); | 57 bool next(const uint8_t* SK_RESTRICT src); |
45 | 58 |
46 // Like next(), but specifies the y value of the source row, so the | 59 // Like next(), but specifies the y value of the source row, so the |
47 // rows can come in any order. If the row is not part of the output | 60 // rows can come in any order. If the row is not part of the output |
48 // sample, it will be skipped. Only sampleInterlaced OR next should | 61 // sample, it will be skipped. Only sampleInterlaced OR next should |
49 // be called for one SkScaledBitmapSampler. | 62 // be called for one SkScaledBitmapSampler. |
50 bool sampleInterlaced(const uint8_t* SK_RESTRICT src, int srcY); | 63 bool sampleInterlaced(const uint8_t* SK_RESTRICT src, int srcY); |
51 | 64 |
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85 // optional reference to the src colors if the src is a palette model | 98 // optional reference to the src colors if the src is a palette model |
86 const SkPMColor* fCTable; | 99 const SkPMColor* fCTable; |
87 | 100 |
88 #ifdef SK_DEBUG | 101 #ifdef SK_DEBUG |
89 // Helper class allowing a test to have access to fRowProc. | 102 // Helper class allowing a test to have access to fRowProc. |
90 friend class RowProcTester; | 103 friend class RowProcTester; |
91 #endif | 104 #endif |
92 }; | 105 }; |
93 | 106 |
94 #endif | 107 #endif |
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