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| 1 /* | 1 /* |
| 2 * Copyright 2011 Google Inc. | 2 * Copyright 2011 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 #include "SkColorMatrix.h" | 7 #include "SkColorMatrix.h" |
| 8 | 8 |
| 9 // To detect if we need to apply clamping after applying a matrix, we check if | 9 // To detect if we need to apply clamping after applying a matrix, we check if |
| 10 // any output component might go outside of [0, 255] for any combination of | 10 // any output component might go outside of [0, 255] for any combination of |
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| 185 static const SkScalar kU2B = 1.772f; | 185 static const SkScalar kU2B = 1.772f; |
| 186 | 186 |
| 187 void SkColorMatrix::setYUV2RGB() { | 187 void SkColorMatrix::setYUV2RGB() { |
| 188 memset(fMat, 0, sizeof(fMat)); | 188 memset(fMat, 0, sizeof(fMat)); |
| 189 | 189 |
| 190 setrow(fMat + 0, 1, 0, kV2R); | 190 setrow(fMat + 0, 1, 0, kV2R); |
| 191 setrow(fMat + 5, 1, kU2G, kV2G); | 191 setrow(fMat + 5, 1, kU2G, kV2G); |
| 192 setrow(fMat + 10, 1, kU2B, 0); | 192 setrow(fMat + 10, 1, kU2B, 0); |
| 193 fMat[kA_Scale] = 1; | 193 fMat[kA_Scale] = 1; |
| 194 } | 194 } |
| 195 | |
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