bsalomon | f267c1e | 2016-02-01 13:16:14 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2014 Google Inc. |
| 3 | * |
| 4 | * Use of this source code is governed by a BSD-style license that can be |
| 5 | * found in the LICENSE file. |
| 6 | */ |
| 7 | |
| 8 | #ifndef GrYUVEffect_DEFINED |
| 9 | #define GrYUVEffect_DEFINED |
| 10 | |
| 11 | #include "SkImageInfo.h" |
| 12 | |
| 13 | class GrFragmentProcessor; |
| 14 | class GrTexture; |
| 15 | |
| 16 | namespace GrYUVEffect { |
| 17 | /** |
| 18 | * Creates an effect that performs color conversion from YUV to RGB. The input textures are |
| 19 | * assumed to be kA8_GrPixelConfig. |
| 20 | */ |
| 21 | const GrFragmentProcessor* CreateYUVToRGB(GrTexture* yTexture, GrTexture* uTexture, |
| 22 | GrTexture* vTexture, const SkISize sizes[3], |
| 23 | SkYUVColorSpace colorSpace); |
| 24 | |
| 25 | /** |
| 26 | * Creates a processor that performs color conversion from the passed in processor's RGB |
| 27 | * channels to Y, U ,and V channels. The output color is (y, u, v, a) where a is the passed in |
| 28 | * processor's alpha output. |
| 29 | */ |
| 30 | const GrFragmentProcessor* CreateRGBToYUV(const GrFragmentProcessor*, |
| 31 | SkYUVColorSpace colorSpace); |
| 32 | |
| 33 | /** |
| 34 | * Creates a processor that performs color conversion from the passed in processor's RGB |
| 35 | * channels to U and V channels. The output color is (u, v, 0, a) where a is the passed in |
| 36 | * processor's alpha output. |
| 37 | */ |
| 38 | const GrFragmentProcessor* CreateRGBToUV(const GrFragmentProcessor*, |
| 39 | SkYUVColorSpace colorSpace); |
| 40 | /** |
| 41 | * Creates a processor that performs color conversion from the passed in fragment processors's |
| 42 | * RGB channels to Y, U, or V (replicated across all four output color channels). The alpha |
| 43 | * output of the passed in fragment processor is ignored. |
| 44 | */ |
| 45 | const GrFragmentProcessor* CreateRGBToY(const GrFragmentProcessor*, SkYUVColorSpace colorSpace); |
| 46 | const GrFragmentProcessor* CreateRGBToU(const GrFragmentProcessor*, SkYUVColorSpace colorSpace); |
| 47 | const GrFragmentProcessor* CreateRGBToV(const GrFragmentProcessor*, SkYUVColorSpace colorSpace); |
| 48 | }; |
| 49 | |
| 50 | #endif |