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1 /* | 1 /* |
2 * Copyright 2014 Google Inc. | 2 * Copyright 2014 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 #include "gl/builders/GrGLProgramBuilder.h" | 8 #include "gl/builders/GrGLProgramBuilder.h" |
9 #include "GrBicubicEffect.h" | 9 #include "GrBicubicEffect.h" |
10 | 10 #include "GrInvariantOutput.h" |
11 | 11 |
12 #define DS(x) SkDoubleToScalar(x) | 12 #define DS(x) SkDoubleToScalar(x) |
13 | 13 |
14 const SkScalar GrBicubicEffect::gMitchellCoefficients[16] = { | 14 const SkScalar GrBicubicEffect::gMitchellCoefficients[16] = { |
15 DS( 1.0 / 18.0), DS(-9.0 / 18.0), DS( 15.0 / 18.0), DS( -7.0 / 18.0), | 15 DS( 1.0 / 18.0), DS(-9.0 / 18.0), DS( 15.0 / 18.0), DS( -7.0 / 18.0), |
16 DS(16.0 / 18.0), DS( 0.0 / 18.0), DS(-36.0 / 18.0), DS( 21.0 / 18.0), | 16 DS(16.0 / 18.0), DS( 0.0 / 18.0), DS(-36.0 / 18.0), DS( 21.0 / 18.0), |
17 DS( 1.0 / 18.0), DS( 9.0 / 18.0), DS( 27.0 / 18.0), DS(-21.0 / 18.0), | 17 DS( 1.0 / 18.0), DS( 9.0 / 18.0), DS( 27.0 / 18.0), DS(-21.0 / 18.0), |
18 DS( 0.0 / 18.0), DS( 0.0 / 18.0), DS( -6.0 / 18.0), DS( 7.0 / 18.0), | 18 DS( 0.0 / 18.0), DS( 0.0 / 18.0), DS( -6.0 / 18.0), DS( 7.0 / 18.0), |
19 }; | 19 }; |
20 | 20 |
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161 const GrBackendFragmentProcessorFactory& GrBicubicEffect::getFactory() const { | 161 const GrBackendFragmentProcessorFactory& GrBicubicEffect::getFactory() const { |
162 return GrTBackendFragmentProcessorFactory<GrBicubicEffect>::getInstance(); | 162 return GrTBackendFragmentProcessorFactory<GrBicubicEffect>::getInstance(); |
163 } | 163 } |
164 | 164 |
165 bool GrBicubicEffect::onIsEqual(const GrFragmentProcessor& sBase) const { | 165 bool GrBicubicEffect::onIsEqual(const GrFragmentProcessor& sBase) const { |
166 const GrBicubicEffect& s = sBase.cast<GrBicubicEffect>(); | 166 const GrBicubicEffect& s = sBase.cast<GrBicubicEffect>(); |
167 return !memcmp(fCoefficients, s.coefficients(), 16) && | 167 return !memcmp(fCoefficients, s.coefficients(), 16) && |
168 fDomain == s.fDomain; | 168 fDomain == s.fDomain; |
169 } | 169 } |
170 | 170 |
171 void GrBicubicEffect::onComputeInvariantOutput(InvariantOutput* inout) const { | 171 void GrBicubicEffect::onComputeInvariantOutput(GrInvariantOutput* inout) const { |
172 // FIXME: Perhaps we can do better. | 172 // FIXME: Perhaps we can do better. |
173 inout->mulByUnknownAlpha(); | 173 inout->mulByUnknownAlpha(); |
174 } | 174 } |
175 | 175 |
176 GR_DEFINE_FRAGMENT_PROCESSOR_TEST(GrBicubicEffect); | 176 GR_DEFINE_FRAGMENT_PROCESSOR_TEST(GrBicubicEffect); |
177 | 177 |
178 GrFragmentProcessor* GrBicubicEffect::TestCreate(SkRandom* random, | 178 GrFragmentProcessor* GrBicubicEffect::TestCreate(SkRandom* random, |
179 GrContext* context, | 179 GrContext* context, |
180 const GrDrawTargetCaps&, | 180 const GrDrawTargetCaps&, |
181 GrTexture* textures[]) { | 181 GrTexture* textures[]) { |
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213 // Use bilerp to handle rotation or fractional translation. | 213 // Use bilerp to handle rotation or fractional translation. |
214 *filterMode = GrTextureParams::kBilerp_FilterMode; | 214 *filterMode = GrTextureParams::kBilerp_FilterMode; |
215 } | 215 } |
216 return false; | 216 return false; |
217 } | 217 } |
218 // When we use the bicubic filtering effect each sample is read from the tex
ture using | 218 // When we use the bicubic filtering effect each sample is read from the tex
ture using |
219 // nearest neighbor sampling. | 219 // nearest neighbor sampling. |
220 *filterMode = GrTextureParams::kNone_FilterMode; | 220 *filterMode = GrTextureParams::kNone_FilterMode; |
221 return true; | 221 return true; |
222 } | 222 } |
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