1 /* 2 * Copyright 2013 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 SkGpuBlurUtils_DEFINED 9 #define SkGpuBlurUtils_DEFINED 10 11 #if SK_SUPPORT_GPU 12 class GrTexture; 13 class GrContext; 14 #endif 15 16 struct SkRect; 17 18 namespace SkGpuBlurUtils { 19 20 #if SK_SUPPORT_GPU 21 /** 22 * Applies a 2D Gaussian blur to a given texture. 23 * @param context The GPU context 24 * @param srcTexture The source texture to be blurred. 25 * @param canClobberSrc If true, srcTexture may be overwritten, and 26 * may be returned as the result. 27 * @param rect The destination rectangle. 28 * @param cropToRect If true, do not sample any pixels outside the 29 * source rect. 30 * @param sigmaX The blur's standard deviation in X. 31 * @param sigmaY The blur's standard deviation in Y. 32 * @return the blurred texture, which may be srcTexture reffed, or a 33 * new texture. It is the caller's responsibility to unref this texture. 34 */ 35 GrTexture* GaussianBlur(GrContext* context, 36 GrTexture* srcTexture, 37 bool canClobberSrc, 38 const SkRect& rect, 39 bool cropToRect, 40 float sigmaX, 41 float sigmaY); 42 #endif 43 44 }; 45 46 #endif 47
