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 GrMatrixConvolutionEffect_DEFINED 9 #define GrMatrixConvolutionEffect_DEFINED 10 11 #include "GrSingleTextureEffect.h" 12 #include "GrTextureDomain.h" 13 14 // A little bit less than the minimum # uniforms required by DX9SM2 (32). 15 // Allows for a 5x5 kernel (or 25x1, for that matter). 16 #define MAX_KERNEL_SIZE 25 17 18 class GrGLMatrixConvolutionEffect; 19 20 class GrMatrixConvolutionEffect : public GrSingleTextureEffect { 21 public: 22 static GrFragmentProcessor* Create(GrTexture* texture, 23 const SkIRect& bounds, 24 const SkISize& kernelSize, 25 const SkScalar* kernel, 26 SkScalar gain, 27 SkScalar bias, 28 const SkIPoint& kernelOffset, 29 GrTextureDomain::Mode tileMode, 30 bool convolveAlpha) { 31 return SkNEW_ARGS(GrMatrixConvolutionEffect, (texture, 32 bounds, 33 kernelSize, 34 kernel, 35 gain, 36 bias, 37 kernelOffset, 38 tileMode, 39 convolveAlpha)); 40 } 41 42 static GrFragmentProcessor* CreateGaussian(GrTexture* texture, 43 const SkIRect& bounds, 44 const SkISize& kernelSize, 45 SkScalar gain, 46 SkScalar bias, 47 const SkIPoint& kernelOffset, 48 GrTextureDomain::Mode tileMode, 49 bool convolveAlpha, 50 SkScalar sigmaX, 51 SkScalar sigmaY); 52 53 virtual ~GrMatrixConvolutionEffect(); 54 55 virtual void getConstantColorComponents(GrColor* color, 56 uint32_t* validFlags) const SK_OVERRIDE { 57 // TODO: Try to do better? 58 *validFlags = 0; 59 } 60 61 static const char* Name() { return "MatrixConvolution"; } 62 const SkIRect& bounds() const { return fBounds; } 63 const SkISize& kernelSize() const { return fKernelSize; } 64 const float* kernelOffset() const { return fKernelOffset; } 65 const float* kernel() const { return fKernel; } 66 float gain() const { return fGain; } 67 float bias() const { return fBias; } 68 bool convolveAlpha() const { return fConvolveAlpha; } 69 const GrTextureDomain& domain() const { return fDomain; } 70 71 typedef GrGLMatrixConvolutionEffect GLProcessor; 72 73 virtual const GrBackendFragmentProcessorFactory& getFactory() const SK_OVERRIDE; 74 75 private: 76 GrMatrixConvolutionEffect(GrTexture*, 77 const SkIRect& bounds, 78 const SkISize& kernelSize, 79 const SkScalar* kernel, 80 SkScalar gain, 81 SkScalar bias, 82 const SkIPoint& kernelOffset, 83 GrTextureDomain::Mode tileMode, 84 bool convolveAlpha); 85 86 virtual bool onIsEqual(const GrProcessor&) const SK_OVERRIDE; 87 88 SkIRect fBounds; 89 SkISize fKernelSize; 90 float fKernel[MAX_KERNEL_SIZE]; 91 float fGain; 92 float fBias; 93 float fKernelOffset[2]; 94 bool fConvolveAlpha; 95 GrTextureDomain fDomain; 96 97 GR_DECLARE_FRAGMENT_PROCESSOR_TEST; 98 99 typedef GrSingleTextureEffect INHERITED; 100 }; 101 102 #endif 103
