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 GrTextureProxy; 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 sk_sp<GrFragmentProcessor> MakeYUVToRGB(sk_sp<GrTextureProxy> yProxy, 22 sk_sp<GrTextureProxy> uProxy, 23 sk_sp<GrTextureProxy> vProxy, const SkISize sizes[3], 24 SkYUVColorSpace colorSpace, bool nv12); 25 26 /** 27 * Creates a processor that performs color conversion from the passed in processor's RGB 28 * channels to Y, U ,and V channels. The output color is (y, u, v, a) where a is the passed in 29 * processor's alpha output. 30 */ 31 sk_sp<GrFragmentProcessor> MakeRGBToYUV(sk_sp<GrFragmentProcessor>, SkYUVColorSpace); 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 sk_sp<GrFragmentProcessor> MakeRGBToUV(sk_sp<GrFragmentProcessor>, SkYUVColorSpace); 39 /** 40 * Creates a processor that performs color conversion from the passed in fragment processors's 41 * RGB channels to Y, U, or V (replicated across all four output color channels). The alpha 42 * output of the passed in fragment processor is ignored. 43 */ 44 sk_sp<GrFragmentProcessor> MakeRGBToY(sk_sp<GrFragmentProcessor>, SkYUVColorSpace); 45 sk_sp<GrFragmentProcessor> MakeRGBToU(sk_sp<GrFragmentProcessor>, SkYUVColorSpace); 46 sk_sp<GrFragmentProcessor> MakeRGBToV(sk_sp<GrFragmentProcessor>, SkYUVColorSpace); 47 }; 48 49 #endif 50
