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1 /* | 1 /* |
2 * Copyright 2013 Google Inc. | 2 * Copyright 2013 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 GrBezierEffect_DEFINED | 8 #ifndef GrBezierEffect_DEFINED |
9 #define GrBezierEffect_DEFINED | 9 #define GrBezierEffect_DEFINED |
10 | 10 |
11 #include "GrDrawTargetCaps.h" | 11 #include "GrDrawTargetCaps.h" |
12 #include "GrProcessor.h" | 12 #include "GrProcessor.h" |
13 #include "GrGeometryProcessor.h" | 13 #include "GrGeometryProcessor.h" |
| 14 #include "GrInvariantOutput.h" |
14 #include "GrTypesPriv.h" | 15 #include "GrTypesPriv.h" |
15 | 16 |
16 /** | 17 /** |
17 * Shader is based off of Loop-Blinn Quadratic GPU Rendering | 18 * Shader is based off of Loop-Blinn Quadratic GPU Rendering |
18 * The output of this effect is a hairline edge for conics. | 19 * The output of this effect is a hairline edge for conics. |
19 * Conics specified by implicit equation K^2 - LM. | 20 * Conics specified by implicit equation K^2 - LM. |
20 * K, L, and M, are the first three values of the vertex attribute, | 21 * K, L, and M, are the first three values of the vertex attribute, |
21 * the fourth value is not used. Distance is calculated using a | 22 * the fourth value is not used. Distance is calculated using a |
22 * first order approximation from the taylor series. | 23 * first order approximation from the taylor series. |
23 * Coverage for AA is max(0, 1-distance). | 24 * Coverage for AA is max(0, 1-distance). |
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94 | 95 |
95 typedef GrGLConicEffect GLProcessor; | 96 typedef GrGLConicEffect GLProcessor; |
96 | 97 |
97 virtual const GrBackendGeometryProcessorFactory& getFactory() const SK_OVERR
IDE; | 98 virtual const GrBackendGeometryProcessorFactory& getFactory() const SK_OVERR
IDE; |
98 | 99 |
99 private: | 100 private: |
100 GrConicEffect(GrPrimitiveEdgeType); | 101 GrConicEffect(GrPrimitiveEdgeType); |
101 | 102 |
102 virtual bool onIsEqual(const GrGeometryProcessor& other) const SK_OVERRIDE; | 103 virtual bool onIsEqual(const GrGeometryProcessor& other) const SK_OVERRIDE; |
103 | 104 |
104 virtual void onComputeInvariantOutput(InvariantOutput* inout) const SK_OVERR
IDE { | 105 virtual void onComputeInvariantOutput(GrInvariantOutput* inout) const SK_OVE
RRIDE { |
105 inout->mulByUnknownAlpha(); | 106 inout->mulByUnknownAlpha(); |
106 } | 107 } |
107 | 108 |
108 GrPrimitiveEdgeType fEdgeType; | 109 GrPrimitiveEdgeType fEdgeType; |
109 const GrShaderVar& fInConicCoeffs; | 110 const GrShaderVar& fInConicCoeffs; |
110 | 111 |
111 GR_DECLARE_GEOMETRY_PROCESSOR_TEST; | 112 GR_DECLARE_GEOMETRY_PROCESSOR_TEST; |
112 | 113 |
113 typedef GrGeometryProcessor INHERITED; | 114 typedef GrGeometryProcessor INHERITED; |
114 }; | 115 }; |
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163 | 164 |
164 typedef GrGLQuadEffect GLProcessor; | 165 typedef GrGLQuadEffect GLProcessor; |
165 | 166 |
166 virtual const GrBackendGeometryProcessorFactory& getFactory() const SK_OVERR
IDE; | 167 virtual const GrBackendGeometryProcessorFactory& getFactory() const SK_OVERR
IDE; |
167 | 168 |
168 private: | 169 private: |
169 GrQuadEffect(GrPrimitiveEdgeType); | 170 GrQuadEffect(GrPrimitiveEdgeType); |
170 | 171 |
171 virtual bool onIsEqual(const GrGeometryProcessor& other) const SK_OVERRIDE; | 172 virtual bool onIsEqual(const GrGeometryProcessor& other) const SK_OVERRIDE; |
172 | 173 |
173 virtual void onComputeInvariantOutput(InvariantOutput* inout) const SK_OVERR
IDE { | 174 virtual void onComputeInvariantOutput(GrInvariantOutput* inout) const SK_OVE
RRIDE { |
174 inout->mulByUnknownAlpha(); | 175 inout->mulByUnknownAlpha(); |
175 } | 176 } |
176 | 177 |
177 GrPrimitiveEdgeType fEdgeType; | 178 GrPrimitiveEdgeType fEdgeType; |
178 const GrShaderVar& fInHairQuadEdge; | 179 const GrShaderVar& fInHairQuadEdge; |
179 | 180 |
180 GR_DECLARE_GEOMETRY_PROCESSOR_TEST; | 181 GR_DECLARE_GEOMETRY_PROCESSOR_TEST; |
181 | 182 |
182 typedef GrGeometryProcessor INHERITED; | 183 typedef GrGeometryProcessor INHERITED; |
183 }; | 184 }; |
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234 | 235 |
235 typedef GrGLCubicEffect GLProcessor; | 236 typedef GrGLCubicEffect GLProcessor; |
236 | 237 |
237 virtual const GrBackendGeometryProcessorFactory& getFactory() const SK_OVERR
IDE; | 238 virtual const GrBackendGeometryProcessorFactory& getFactory() const SK_OVERR
IDE; |
238 | 239 |
239 private: | 240 private: |
240 GrCubicEffect(GrPrimitiveEdgeType); | 241 GrCubicEffect(GrPrimitiveEdgeType); |
241 | 242 |
242 virtual bool onIsEqual(const GrGeometryProcessor& other) const SK_OVERRIDE; | 243 virtual bool onIsEqual(const GrGeometryProcessor& other) const SK_OVERRIDE; |
243 | 244 |
244 virtual void onComputeInvariantOutput(InvariantOutput* inout) const SK_OVERR
IDE { | 245 virtual void onComputeInvariantOutput(GrInvariantOutput* inout) const SK_OVE
RRIDE { |
245 inout->mulByUnknownAlpha(); | 246 inout->mulByUnknownAlpha(); |
246 } | 247 } |
247 | 248 |
248 GrPrimitiveEdgeType fEdgeType; | 249 GrPrimitiveEdgeType fEdgeType; |
249 const GrShaderVar& fInCubicCoeffs; | 250 const GrShaderVar& fInCubicCoeffs; |
250 | 251 |
251 GR_DECLARE_GEOMETRY_PROCESSOR_TEST; | 252 GR_DECLARE_GEOMETRY_PROCESSOR_TEST; |
252 | 253 |
253 typedef GrGeometryProcessor INHERITED; | 254 typedef GrGeometryProcessor INHERITED; |
254 }; | 255 }; |
255 | 256 |
256 #endif | 257 #endif |
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