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1 /* | 1 /* |
2 * Copyright 2012 Google Inc. | 2 * Copyright 2012 Google Inc. |
3 * | 3 * |
4 * Use of this source code is governed by a BSD-style license that can be | 4 * Use of this source code is governed by a BSD-style license that can be |
5 * found in the LICENSE file. | 5 * found in the LICENSE file. |
6 */ | 6 */ |
7 | 7 |
8 #ifndef GrConvolutionEffect_DEFINED | 8 #ifndef GrConvolutionEffect_DEFINED |
9 #define GrConvolutionEffect_DEFINED | 9 #define GrConvolutionEffect_DEFINED |
10 | 10 |
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57 | 57 |
58 const float* bounds() const { return fBounds; } | 58 const float* bounds() const { return fBounds; } |
59 bool useBounds() const { return fUseBounds; } | 59 bool useBounds() const { return fUseBounds; } |
60 | 60 |
61 static const char* Name() { return "Convolution"; } | 61 static const char* Name() { return "Convolution"; } |
62 | 62 |
63 typedef GrGLConvolutionEffect GLProcessor; | 63 typedef GrGLConvolutionEffect GLProcessor; |
64 | 64 |
65 virtual const GrBackendFragmentProcessorFactory& getFactory() const SK_OVERR
IDE; | 65 virtual const GrBackendFragmentProcessorFactory& getFactory() const SK_OVERR
IDE; |
66 | 66 |
| 67 virtual void getConstantColorComponents(GrColor*, uint32_t* validFlags) cons
t { |
| 68 // If the texture was opaque we could know that the output color if we k
new the sum of the |
| 69 // kernel values. |
| 70 *validFlags = 0; |
| 71 } |
| 72 |
67 enum { | 73 enum { |
68 // This was decided based on the min allowed value for the max texture | 74 // This was decided based on the min allowed value for the max texture |
69 // samples per fragment program run in DX9SM2 (32). A sigma param of 4.0 | 75 // samples per fragment program run in DX9SM2 (32). A sigma param of 4.0 |
70 // on a blur filter gives a kernel width of 25 while a sigma of 5.0 | 76 // on a blur filter gives a kernel width of 25 while a sigma of 5.0 |
71 // would exceed a 32 wide kernel. | 77 // would exceed a 32 wide kernel. |
72 kMaxKernelRadius = 12, | 78 kMaxKernelRadius = 12, |
73 // With a C++11 we could have a constexpr version of WidthFromRadius() | 79 // With a C++11 we could have a constexpr version of WidthFromRadius() |
74 // and not have to duplicate this calculation. | 80 // and not have to duplicate this calculation. |
75 kMaxKernelWidth = 2 * kMaxKernelRadius + 1, | 81 kMaxKernelWidth = 2 * kMaxKernelRadius + 1, |
76 }; | 82 }; |
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90 | 96 |
91 /// Convolve with a Gaussian kernel | 97 /// Convolve with a Gaussian kernel |
92 GrConvolutionEffect(GrTexture*, Direction, | 98 GrConvolutionEffect(GrTexture*, Direction, |
93 int halfWidth, | 99 int halfWidth, |
94 float gaussianSigma, | 100 float gaussianSigma, |
95 bool useBounds, | 101 bool useBounds, |
96 float bounds[2]); | 102 float bounds[2]); |
97 | 103 |
98 virtual bool onIsEqual(const GrProcessor&) const SK_OVERRIDE; | 104 virtual bool onIsEqual(const GrProcessor&) const SK_OVERRIDE; |
99 | 105 |
100 virtual void onComputeInvariantOutput(InvariantOutput* inout) const { | |
101 // If the texture was opaque we could know that the output color if we k
new the sum of the | |
102 // kernel values. | |
103 inout->fValidFlags = 0; | |
104 inout->fIsSingleComponent = false; | |
105 } | |
106 | |
107 GR_DECLARE_FRAGMENT_PROCESSOR_TEST; | 106 GR_DECLARE_FRAGMENT_PROCESSOR_TEST; |
108 | 107 |
109 typedef Gr1DKernelEffect INHERITED; | 108 typedef Gr1DKernelEffect INHERITED; |
110 }; | 109 }; |
111 | 110 |
112 #endif | 111 #endif |
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