/* * 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 GrMatrixConvolutionEffect_DEFINED #define GrMatrixConvolutionEffect_DEFINED #include "GrSingleTextureEffect.h" #include "GrTextureDomain.h" // A little bit less than the minimum # uniforms required by DX9SM2 (32). // Allows for a 5x5 kernel (or 25x1, for that matter). #define MAX_KERNEL_SIZE 25 class GrMatrixConvolutionEffect : public GrSingleTextureEffect { public: static sk_sp Make(sk_sp proxy, const SkIRect& bounds, const SkISize& kernelSize, const SkScalar* kernel, SkScalar gain, SkScalar bias, const SkIPoint& kernelOffset, GrTextureDomain::Mode tileMode, bool convolveAlpha) { return sk_sp( new GrMatrixConvolutionEffect(std::move(proxy), bounds, kernelSize, kernel, gain, bias, kernelOffset, tileMode, convolveAlpha)); } static sk_sp MakeGaussian(sk_sp proxy, const SkIRect& bounds, const SkISize& kernelSize, SkScalar gain, SkScalar bias, const SkIPoint& kernelOffset, GrTextureDomain::Mode tileMode, bool convolveAlpha, SkScalar sigmaX, SkScalar sigmaY); const SkIRect& bounds() const { return fBounds; } const SkISize& kernelSize() const { return fKernelSize; } const float* kernelOffset() const { return fKernelOffset; } const float* kernel() const { return fKernel; } float gain() const { return fGain; } float bias() const { return fBias; } bool convolveAlpha() const { return fConvolveAlpha; } const GrTextureDomain& domain() const { return fDomain; } const char* name() const override { return "MatrixConvolution"; } private: GrMatrixConvolutionEffect(sk_sp proxy, const SkIRect& bounds, const SkISize& kernelSize, const SkScalar* kernel, SkScalar gain, SkScalar bias, const SkIPoint& kernelOffset, GrTextureDomain::Mode tileMode, bool convolveAlpha); GrGLSLFragmentProcessor* onCreateGLSLInstance() const override; void onGetGLSLProcessorKey(const GrShaderCaps&, GrProcessorKeyBuilder*) const override; bool onIsEqual(const GrFragmentProcessor&) const override; SkIRect fBounds; SkISize fKernelSize; float fKernel[MAX_KERNEL_SIZE]; float fGain; float fBias; float fKernelOffset[2]; bool fConvolveAlpha; GrTextureDomain fDomain; GR_DECLARE_FRAGMENT_PROCESSOR_TEST; typedef GrSingleTextureEffect INHERITED; }; #endif