Line data    Source code

       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           0 : class GrMatrixConvolutionEffect : public GrSingleTextureEffect {
      19             : public:
      20           0 :     static sk_sp<GrFragmentProcessor> Make(GrResourceProvider* resourceProvider,
      21             :                                            sk_sp<GrTextureProxy> proxy,
      22             :                                            const SkIRect& bounds,
      23             :                                            const SkISize& kernelSize,
      24             :                                            const SkScalar* kernel,
      25             :                                            SkScalar gain,
      26             :                                            SkScalar bias,
      27             :                                            const SkIPoint& kernelOffset,
      28             :                                            GrTextureDomain::Mode tileMode,
      29             :                                            bool convolveAlpha) {
      30             :         return sk_sp<GrFragmentProcessor>(
      31           0 :             new GrMatrixConvolutionEffect(resourceProvider, std::move(proxy), bounds, kernelSize,
      32           0 :                                           kernel, gain, bias, kernelOffset, tileMode, convolveAlpha));
      33             :     }
      34             : 
      35             :     static sk_sp<GrFragmentProcessor> MakeGaussian(GrResourceProvider*,
      36             :                                                    sk_sp<GrTextureProxy> proxy,
      37             :                                                    const SkIRect& bounds,
      38             :                                                    const SkISize& kernelSize,
      39             :                                                    SkScalar gain,
      40             :                                                    SkScalar bias,
      41             :                                                    const SkIPoint& kernelOffset,
      42             :                                                    GrTextureDomain::Mode tileMode,
      43             :                                                    bool convolveAlpha,
      44             :                                                    SkScalar sigmaX,
      45             :                                                    SkScalar sigmaY);
      46             : 
      47             :     const SkIRect& bounds() const { return fBounds; }
      48           0 :     const SkISize& kernelSize() const { return fKernelSize; }
      49           0 :     const float* kernelOffset() const { return fKernelOffset; }
      50           0 :     const float* kernel() const { return fKernel; }
      51           0 :     float gain() const { return fGain; }
      52           0 :     float bias() const { return fBias; }
      53           0 :     bool convolveAlpha() const { return fConvolveAlpha; }
      54           0 :     const GrTextureDomain& domain() const { return fDomain; }
      55             : 
      56           0 :     const char* name() const override { return "MatrixConvolution"; }
      57             : 
      58             : private:
      59             :     GrMatrixConvolutionEffect(GrResourceProvider*,
      60             :                               sk_sp<GrTextureProxy> proxy,
      61             :                               const SkIRect& bounds,
      62             :                               const SkISize& kernelSize,
      63             :                               const SkScalar* kernel,
      64             :                               SkScalar gain,
      65             :                               SkScalar bias,
      66             :                               const SkIPoint& kernelOffset,
      67             :                               GrTextureDomain::Mode tileMode,
      68             :                               bool convolveAlpha);
      69             : 
      70             :     GrGLSLFragmentProcessor* onCreateGLSLInstance() const override;
      71             : 
      72             :     void onGetGLSLProcessorKey(const GrShaderCaps&, GrProcessorKeyBuilder*) const override;
      73             : 
      74             :     bool onIsEqual(const GrFragmentProcessor&) const override;
      75             : 
      76             :     SkIRect         fBounds;
      77             :     SkISize         fKernelSize;
      78             :     float           fKernel[MAX_KERNEL_SIZE];
      79             :     float           fGain;
      80             :     float           fBias;
      81             :     float           fKernelOffset[2];
      82             :     bool            fConvolveAlpha;
      83             :     GrTextureDomain fDomain;
      84             : 
      85             :     GR_DECLARE_FRAGMENT_PROCESSOR_TEST;
      86             : 
      87             :     typedef GrSingleTextureEffect INHERITED;
      88             : };
      89             : 
      90             : #endif