| /* |
| * Copyright 2014 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #ifndef GrYUVEffect_DEFINED |
| #define GrYUVEffect_DEFINED |
| |
| #include "SkImageInfo.h" |
| |
| class GrFragmentProcessor; |
| class GrTexture; |
| |
| namespace GrYUVEffect { |
| /** |
| * Creates an effect that performs color conversion from YUV to RGB. The input textures are |
| * assumed to be kA8_GrPixelConfig. |
| */ |
| sk_sp<GrFragmentProcessor> MakeYUVToRGB(GrTexture* yTexture, GrTexture* uTexture, |
| GrTexture* vTexture, const SkISize sizes[3], |
| SkYUVColorSpace colorSpace); |
| |
| /** |
| * Creates a processor that performs color conversion from the passed in processor's RGB |
| * channels to Y, U ,and V channels. The output color is (y, u, v, a) where a is the passed in |
| * processor's alpha output. |
| */ |
| sk_sp<GrFragmentProcessor> MakeRGBToYUV(sk_sp<GrFragmentProcessor>, |
| SkYUVColorSpace colorSpace); |
| |
| /** |
| * Creates a processor that performs color conversion from the passed in processor's RGB |
| * channels to U and V channels. The output color is (u, v, 0, a) where a is the passed in |
| * processor's alpha output. |
| */ |
| sk_sp<GrFragmentProcessor> MakeRGBToUV(sk_sp<GrFragmentProcessor>, |
| SkYUVColorSpace colorSpace); |
| /** |
| * Creates a processor that performs color conversion from the passed in fragment processors's |
| * RGB channels to Y, U, or V (replicated across all four output color channels). The alpha |
| * output of the passed in fragment processor is ignored. |
| */ |
| sk_sp<GrFragmentProcessor> MakeRGBToY(sk_sp<GrFragmentProcessor>, SkYUVColorSpace colorSpace); |
| sk_sp<GrFragmentProcessor> MakeRGBToU(sk_sp<GrFragmentProcessor>, SkYUVColorSpace colorSpace); |
| sk_sp<GrFragmentProcessor> MakeRGBToV(sk_sp<GrFragmentProcessor>, SkYUVColorSpace colorSpace); |
| }; |
| |
| #endif |