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1 /* | 1 /* |
2 * Copyright 2016 Google Inc. | 2 * Copyright 2016 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 #ifndef GrColorSpaceXform_DEFINED | 8 #ifndef GrColorSpaceXform_DEFINED |
9 #define GrColorSpaceXform_DEFINED | 9 #define GrColorSpaceXform_DEFINED |
10 | 10 |
11 #include "SkImageInfo.h" | |
11 #include "SkRefCnt.h" | 12 #include "SkRefCnt.h" |
12 | 13 |
13 class SkColorSpace; | 14 class SkColorSpace; |
14 class SkMatrix44; | 15 class SkMatrix44; |
15 | 16 |
16 /** | 17 /** |
17 * Represents a color gamut transformation (as a 4x4 color matrix) | 18 * Represents a color gamut transformation (as a 4x4 color matrix) |
18 */ | 19 */ |
19 class GrColorSpaceXform : public SkRefCnt { | 20 class GrColorSpaceXform : public SkRefCnt { |
20 public: | 21 public: |
21 GrColorSpaceXform(const SkMatrix44& srcToDst); | 22 GrColorSpaceXform(const SkMatrix44& srcToDst, SkAlphaType srcAlphaType); |
22 | 23 |
23 static sk_sp<GrColorSpaceXform> Make(SkColorSpace* src, SkColorSpace* dst); | 24 static sk_sp<GrColorSpaceXform> Make(SkColorSpace* src, SkColorSpace* dst, |
25 SkAlphaType srcAlphaType); | |
24 | 26 |
25 const float* srcToDst() { return fSrcToDst; } | 27 const float* srcToDst() { return fSrcToDst; } |
28 SkAlphaType alphaType() const { return fSrcAlphaType; } | |
29 | |
30 /** | |
31 * GrGLSLFragmentProcessor::GenKey() must call this and include the returned value in its | |
bsalomon
2016/09/07 14:46:37
The GrGLSLFragmentProcessor::GenKey() thing is sor
| |
32 * computed key. | |
33 */ | |
34 static uint32_t XformKey(GrColorSpaceXform* xform) { | |
35 if (!xform) { | |
36 return 0; | |
37 } | |
38 // Code generation just depends on whether the alpha type is premul or n ot | |
39 return kPremul_SkAlphaType == xform->fSrcAlphaType ? 1 : 2; | |
40 } | |
26 | 41 |
27 private: | 42 private: |
28 // We store the column-major form of the srcToDst matrix, for easy uploading to uniforms | 43 // We store the column-major form of the srcToDst matrix, for easy uploading to uniforms |
29 float fSrcToDst[16]; | 44 float fSrcToDst[16]; |
45 | |
46 // Alpha type of the source. If it's premul, we need special handling | |
47 SkAlphaType fSrcAlphaType; | |
30 }; | 48 }; |
31 | 49 |
32 #endif | 50 #endif |
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