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comparison: gfx/skia/trunk/src/gpu/effects/GrBezierEffect.cpp
gfx/skia/trunk/src/gpu/effects/GrBezierEffect.cpp
- branch
- TOR_BUG_3246
- changeset 7
- 129ffea94266
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| -1:000000000000 | 0:a6dfd91fe95c |
|---|---|
| 1 /* | |
| 2 * Copyright 2013 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 #include "GrBezierEffect.h" | |
| 9 | |
| 10 #include "gl/GrGLEffect.h" | |
| 11 #include "gl/GrGLSL.h" | |
| 12 #include "gl/GrGLVertexEffect.h" | |
| 13 #include "GrTBackendEffectFactory.h" | |
| 14 | |
| 15 class GrGLConicEffect : public GrGLVertexEffect { | |
| 16 public: | |
| 17 GrGLConicEffect(const GrBackendEffectFactory&, const GrDrawEffect&); | |
| 18 | |
| 19 virtual void emitCode(GrGLFullShaderBuilder* builder, | |
| 20 const GrDrawEffect& drawEffect, | |
| 21 EffectKey key, | |
| 22 const char* outputColor, | |
| 23 const char* inputColor, | |
| 24 const TransformedCoordsArray&, | |
| 25 const TextureSamplerArray&) SK_OVERRIDE; | |
| 26 | |
| 27 static inline EffectKey GenKey(const GrDrawEffect&, const GrGLCaps&); | |
| 28 | |
| 29 virtual void setData(const GrGLUniformManager&, const GrDrawEffect&) SK_OVERRIDE {} | |
| 30 | |
| 31 private: | |
| 32 GrEffectEdgeType fEdgeType; | |
| 33 | |
| 34 typedef GrGLVertexEffect INHERITED; | |
| 35 }; | |
| 36 | |
| 37 GrGLConicEffect::GrGLConicEffect(const GrBackendEffectFactory& factory, | |
| 38 const GrDrawEffect& drawEffect) | |
| 39 : INHERITED (factory) { | |
| 40 const GrConicEffect& ce = drawEffect.castEffect<GrConicEffect>(); | |
| 41 fEdgeType = ce.getEdgeType(); | |
| 42 } | |
| 43 | |
| 44 void GrGLConicEffect::emitCode(GrGLFullShaderBuilder* builder, | |
| 45 const GrDrawEffect& drawEffect, | |
| 46 EffectKey key, | |
| 47 const char* outputColor, | |
| 48 const char* inputColor, | |
| 49 const TransformedCoordsArray&, | |
| 50 const TextureSamplerArray& samplers) { | |
| 51 const char *vsName, *fsName; | |
| 52 | |
| 53 builder->addVarying(kVec4f_GrSLType, "ConicCoeffs", | |
| 54 &vsName, &fsName); | |
| 55 const SkString* attr0Name = | |
| 56 builder->getEffectAttributeName(drawEffect.getVertexAttribIndices()[0]); | |
| 57 builder->vsCodeAppendf("\t%s = %s;\n", vsName, attr0Name->c_str()); | |
| 58 | |
| 59 builder->fsCodeAppend("\t\tfloat edgeAlpha;\n"); | |
| 60 | |
| 61 switch (fEdgeType) { | |
| 62 case kHairlineAA_GrEffectEdgeType: { | |
| 63 SkAssertResult(builder->enableFeature( | |
| 64 GrGLShaderBuilder::kStandardDerivatives_GLSLFeature)); | |
| 65 builder->fsCodeAppendf("\t\tvec3 dklmdx = dFdx(%s.xyz);\n", fsName); | |
| 66 builder->fsCodeAppendf("\t\tvec3 dklmdy = dFdy(%s.xyz);\n", fsName); | |
| 67 builder->fsCodeAppendf("\t\tfloat dfdx =\n" | |
| 68 "\t\t\t2.0*%s.x*dklmdx.x - %s.y*dklmdx.z - %s.z*dklmdx.y;\n", | |
| 69 fsName, fsName, fsName); | |
| 70 builder->fsCodeAppendf("\t\tfloat dfdy =\n" | |
| 71 "\t\t\t2.0*%s.x*dklmdy.x - %s.y*dklmdy.z - %s.z*dklmdy.y;\n", | |
| 72 fsName, fsName, fsName); | |
| 73 builder->fsCodeAppend("\t\tvec2 gF = vec2(dfdx, dfdy);\n"); | |
| 74 builder->fsCodeAppend("\t\tfloat gFM = sqrt(dot(gF, gF));\n"); | |
| 75 builder->fsCodeAppendf("\t\tfloat func = %s.x*%s.x - %s.y*%s.z;\n", fsName, fsName, | |
| 76 fsName, fsName); | |
| 77 builder->fsCodeAppend("\t\tfunc = abs(func);\n"); | |
| 78 builder->fsCodeAppend("\t\tedgeAlpha = func / gFM;\n"); | |
| 79 builder->fsCodeAppend("\t\tedgeAlpha = max(1.0 - edgeAlpha, 0.0);\n"); | |
| 80 // Add line below for smooth cubic ramp | |
| 81 // builder->fsCodeAppend("\t\tedgeAlpha = edgeAlpha*edgeAlpha*(3.0-2.0*edgeAlpha);\n"); | |
| 82 break; | |
| 83 } | |
| 84 case kFillAA_GrEffectEdgeType: { | |
| 85 SkAssertResult(builder->enableFeature( | |
| 86 GrGLShaderBuilder::kStandardDerivatives_GLSLFeature)); | |
| 87 builder->fsCodeAppendf("\t\tvec3 dklmdx = dFdx(%s.xyz);\n", fsName); | |
| 88 builder->fsCodeAppendf("\t\tvec3 dklmdy = dFdy(%s.xyz);\n", fsName); | |
| 89 builder->fsCodeAppendf("\t\tfloat dfdx =\n" | |
| 90 "\t\t\t2.0*%s.x*dklmdx.x - %s.y*dklmdx.z - %s.z*dklmdx.y;\n", | |
| 91 fsName, fsName, fsName); | |
| 92 builder->fsCodeAppendf("\t\tfloat dfdy =\n" | |
| 93 "\t\t\t2.0*%s.x*dklmdy.x - %s.y*dklmdy.z - %s.z*dklmdy.y;\n", | |
| 94 fsName, fsName, fsName); | |
| 95 builder->fsCodeAppend("\t\tvec2 gF = vec2(dfdx, dfdy);\n"); | |
| 96 builder->fsCodeAppend("\t\tfloat gFM = sqrt(dot(gF, gF));\n"); | |
| 97 builder->fsCodeAppendf("\t\tfloat func = %s.x*%s.x - %s.y*%s.z;\n", fsName, fsName, | |
| 98 fsName, fsName); | |
| 99 builder->fsCodeAppend("\t\tedgeAlpha = func / gFM;\n"); | |
| 100 builder->fsCodeAppend("\t\tedgeAlpha = clamp(1.0 - edgeAlpha, 0.0, 1.0);\n"); | |
| 101 // Add line below for smooth cubic ramp | |
| 102 // builder->fsCodeAppend("\t\tedgeAlpha = edgeAlpha*edgeAlpha*(3.0-2.0*edgeAlpha);\n"); | |
| 103 break; | |
| 104 } | |
| 105 case kFillBW_GrEffectEdgeType: { | |
| 106 builder->fsCodeAppendf("\t\tedgeAlpha = %s.x*%s.x - %s.y*%s.z;\n", fsName, fsName, | |
| 107 fsName, fsName); | |
| 108 builder->fsCodeAppend("\t\tedgeAlpha = float(edgeAlpha < 0.0);\n"); | |
| 109 break; | |
| 110 } | |
| 111 default: | |
| 112 GrCrash("Shouldn't get here"); | |
| 113 } | |
| 114 | |
| 115 builder->fsCodeAppendf("\t%s = %s;\n", outputColor, | |
| 116 (GrGLSLExpr4(inputColor) * GrGLSLExpr1("edgeAlpha")).c_str()); | |
| 117 } | |
| 118 | |
| 119 GrGLEffect::EffectKey GrGLConicEffect::GenKey(const GrDrawEffect& drawEffect, const GrGLCaps&) { | |
| 120 const GrConicEffect& ce = drawEffect.castEffect<GrConicEffect>(); | |
| 121 return ce.isAntiAliased() ? (ce.isFilled() ? 0x0 : 0x1) : 0x2; | |
| 122 } | |
| 123 | |
| 124 ////////////////////////////////////////////////////////////////////////////// | |
| 125 | |
| 126 GrConicEffect::~GrConicEffect() {} | |
| 127 | |
| 128 const GrBackendEffectFactory& GrConicEffect::getFactory() const { | |
| 129 return GrTBackendEffectFactory<GrConicEffect>::getInstance(); | |
| 130 } | |
| 131 | |
| 132 GrConicEffect::GrConicEffect(GrEffectEdgeType edgeType) : GrVertexEffect() { | |
| 133 this->addVertexAttrib(kVec4f_GrSLType); | |
| 134 fEdgeType = edgeType; | |
| 135 } | |
| 136 | |
| 137 bool GrConicEffect::onIsEqual(const GrEffect& other) const { | |
| 138 const GrConicEffect& ce = CastEffect<GrConicEffect>(other); | |
| 139 return (ce.fEdgeType == fEdgeType); | |
| 140 } | |
| 141 | |
| 142 ////////////////////////////////////////////////////////////////////////////// | |
| 143 | |
| 144 GR_DEFINE_EFFECT_TEST(GrConicEffect); | |
| 145 | |
| 146 GrEffectRef* GrConicEffect::TestCreate(SkRandom* random, | |
| 147 GrContext*, | |
| 148 const GrDrawTargetCaps& caps, | |
| 149 GrTexture*[]) { | |
| 150 GrEffectRef* effect; | |
| 151 do { | |
| 152 GrEffectEdgeType edgeType = static_cast<GrEffectEdgeType>( | |
| 153 random->nextULessThan(kGrEffectEdgeTypeCnt)); | |
| 154 effect = GrConicEffect::Create(edgeType, caps); | |
| 155 } while (NULL == effect); | |
| 156 return effect; | |
| 157 } | |
| 158 | |
| 159 ////////////////////////////////////////////////////////////////////////////// | |
| 160 // Quad | |
| 161 ////////////////////////////////////////////////////////////////////////////// | |
| 162 | |
| 163 class GrGLQuadEffect : public GrGLVertexEffect { | |
| 164 public: | |
| 165 GrGLQuadEffect(const GrBackendEffectFactory&, const GrDrawEffect&); | |
| 166 | |
| 167 virtual void emitCode(GrGLFullShaderBuilder* builder, | |
| 168 const GrDrawEffect& drawEffect, | |
| 169 EffectKey key, | |
| 170 const char* outputColor, | |
| 171 const char* inputColor, | |
| 172 const TransformedCoordsArray&, | |
| 173 const TextureSamplerArray&) SK_OVERRIDE; | |
| 174 | |
| 175 static inline EffectKey GenKey(const GrDrawEffect&, const GrGLCaps&); | |
| 176 | |
| 177 virtual void setData(const GrGLUniformManager&, const GrDrawEffect&) SK_OVERRIDE {} | |
| 178 | |
| 179 private: | |
| 180 GrEffectEdgeType fEdgeType; | |
| 181 | |
| 182 typedef GrGLVertexEffect INHERITED; | |
| 183 }; | |
| 184 | |
| 185 GrGLQuadEffect::GrGLQuadEffect(const GrBackendEffectFactory& factory, | |
| 186 const GrDrawEffect& drawEffect) | |
| 187 : INHERITED (factory) { | |
| 188 const GrQuadEffect& ce = drawEffect.castEffect<GrQuadEffect>(); | |
| 189 fEdgeType = ce.getEdgeType(); | |
| 190 } | |
| 191 | |
| 192 void GrGLQuadEffect::emitCode(GrGLFullShaderBuilder* builder, | |
| 193 const GrDrawEffect& drawEffect, | |
| 194 EffectKey key, | |
| 195 const char* outputColor, | |
| 196 const char* inputColor, | |
| 197 const TransformedCoordsArray&, | |
| 198 const TextureSamplerArray& samplers) { | |
| 199 const char *vsName, *fsName; | |
| 200 | |
| 201 const SkString* attrName = | |
| 202 builder->getEffectAttributeName(drawEffect.getVertexAttribIndices()[0]); | |
| 203 builder->fsCodeAppendf("\t\tfloat edgeAlpha;\n"); | |
| 204 | |
| 205 builder->addVarying(kVec4f_GrSLType, "HairQuadEdge", &vsName, &fsName); | |
| 206 | |
| 207 switch (fEdgeType) { | |
| 208 case kHairlineAA_GrEffectEdgeType: { | |
| 209 SkAssertResult(builder->enableFeature( | |
| 210 GrGLShaderBuilder::kStandardDerivatives_GLSLFeature)); | |
| 211 builder->fsCodeAppendf("\t\tvec2 duvdx = dFdx(%s.xy);\n", fsName); | |
| 212 builder->fsCodeAppendf("\t\tvec2 duvdy = dFdy(%s.xy);\n", fsName); | |
| 213 builder->fsCodeAppendf("\t\tvec2 gF = vec2(2.0*%s.x*duvdx.x - duvdx.y,\n" | |
| 214 "\t\t 2.0*%s.x*duvdy.x - duvdy.y);\n", | |
| 215 fsName, fsName); | |
| 216 builder->fsCodeAppendf("\t\tedgeAlpha = (%s.x*%s.x - %s.y);\n", fsName, fsName, | |
| 217 fsName); | |
| 218 builder->fsCodeAppend("\t\tedgeAlpha = sqrt(edgeAlpha*edgeAlpha / dot(gF, gF));\n"); | |
| 219 builder->fsCodeAppend("\t\tedgeAlpha = max(1.0 - edgeAlpha, 0.0);\n"); | |
| 220 // Add line below for smooth cubic ramp | |
| 221 // builder->fsCodeAppend("\t\tedgeAlpha = edgeAlpha*edgeAlpha*(3.0-2.0*edgeAlpha);\n"); | |
| 222 break; | |
| 223 } | |
| 224 case kFillAA_GrEffectEdgeType: { | |
| 225 SkAssertResult(builder->enableFeature( | |
| 226 GrGLShaderBuilder::kStandardDerivatives_GLSLFeature)); | |
| 227 builder->fsCodeAppendf("\t\tvec2 duvdx = dFdx(%s.xy);\n", fsName); | |
| 228 builder->fsCodeAppendf("\t\tvec2 duvdy = dFdy(%s.xy);\n", fsName); | |
| 229 builder->fsCodeAppendf("\t\tvec2 gF = vec2(2.0*%s.x*duvdx.x - duvdx.y,\n" | |
| 230 "\t\t 2.0*%s.x*duvdy.x - duvdy.y);\n", | |
| 231 fsName, fsName); | |
| 232 builder->fsCodeAppendf("\t\tedgeAlpha = (%s.x*%s.x - %s.y);\n", fsName, fsName, | |
| 233 fsName); | |
| 234 builder->fsCodeAppend("\t\tedgeAlpha = edgeAlpha / sqrt(dot(gF, gF));\n"); | |
| 235 builder->fsCodeAppend("\t\tedgeAlpha = clamp(1.0 - edgeAlpha, 0.0, 1.0);\n"); | |
| 236 // Add line below for smooth cubic ramp | |
| 237 // builder->fsCodeAppend("\t\tedgeAlpha = edgeAlpha*edgeAlpha*(3.0-2.0*edgeAlpha);\n"); | |
| 238 break; | |
| 239 } | |
| 240 case kFillBW_GrEffectEdgeType: { | |
| 241 builder->fsCodeAppendf("\t\tedgeAlpha = (%s.x*%s.x - %s.y);\n", fsName, fsName, | |
| 242 fsName); | |
| 243 builder->fsCodeAppend("\t\tedgeAlpha = float(edgeAlpha < 0.0);\n"); | |
| 244 break; | |
| 245 } | |
| 246 default: | |
| 247 GrCrash("Shouldn't get here"); | |
| 248 } | |
| 249 | |
| 250 builder->fsCodeAppendf("\t%s = %s;\n", outputColor, | |
| 251 (GrGLSLExpr4(inputColor) * GrGLSLExpr1("edgeAlpha")).c_str()); | |
| 252 | |
| 253 | |
| 254 builder->vsCodeAppendf("\t%s = %s;\n", vsName, attrName->c_str()); | |
| 255 } | |
| 256 | |
| 257 GrGLEffect::EffectKey GrGLQuadEffect::GenKey(const GrDrawEffect& drawEffect, const GrGLCaps&) { | |
| 258 const GrQuadEffect& ce = drawEffect.castEffect<GrQuadEffect>(); | |
| 259 return ce.isAntiAliased() ? (ce.isFilled() ? 0x0 : 0x1) : 0x2; | |
| 260 } | |
| 261 | |
| 262 ////////////////////////////////////////////////////////////////////////////// | |
| 263 | |
| 264 GrQuadEffect::~GrQuadEffect() {} | |
| 265 | |
| 266 const GrBackendEffectFactory& GrQuadEffect::getFactory() const { | |
| 267 return GrTBackendEffectFactory<GrQuadEffect>::getInstance(); | |
| 268 } | |
| 269 | |
| 270 GrQuadEffect::GrQuadEffect(GrEffectEdgeType edgeType) : GrVertexEffect() { | |
| 271 this->addVertexAttrib(kVec4f_GrSLType); | |
| 272 fEdgeType = edgeType; | |
| 273 } | |
| 274 | |
| 275 bool GrQuadEffect::onIsEqual(const GrEffect& other) const { | |
| 276 const GrQuadEffect& ce = CastEffect<GrQuadEffect>(other); | |
| 277 return (ce.fEdgeType == fEdgeType); | |
| 278 } | |
| 279 | |
| 280 ////////////////////////////////////////////////////////////////////////////// | |
| 281 | |
| 282 GR_DEFINE_EFFECT_TEST(GrQuadEffect); | |
| 283 | |
| 284 GrEffectRef* GrQuadEffect::TestCreate(SkRandom* random, | |
| 285 GrContext*, | |
| 286 const GrDrawTargetCaps& caps, | |
| 287 GrTexture*[]) { | |
| 288 GrEffectRef* effect; | |
| 289 do { | |
| 290 GrEffectEdgeType edgeType = static_cast<GrEffectEdgeType>( | |
| 291 random->nextULessThan(kGrEffectEdgeTypeCnt)); | |
| 292 effect = GrQuadEffect::Create(edgeType, caps); | |
| 293 } while (NULL == effect); | |
| 294 return effect; | |
| 295 } | |
| 296 | |
| 297 ////////////////////////////////////////////////////////////////////////////// | |
| 298 // Cubic | |
| 299 ////////////////////////////////////////////////////////////////////////////// | |
| 300 | |
| 301 class GrGLCubicEffect : public GrGLVertexEffect { | |
| 302 public: | |
| 303 GrGLCubicEffect(const GrBackendEffectFactory&, const GrDrawEffect&); | |
| 304 | |
| 305 virtual void emitCode(GrGLFullShaderBuilder* builder, | |
| 306 const GrDrawEffect& drawEffect, | |
| 307 EffectKey key, | |
| 308 const char* outputColor, | |
| 309 const char* inputColor, | |
| 310 const TransformedCoordsArray&, | |
| 311 const TextureSamplerArray&) SK_OVERRIDE; | |
| 312 | |
| 313 static inline EffectKey GenKey(const GrDrawEffect&, const GrGLCaps&); | |
| 314 | |
| 315 virtual void setData(const GrGLUniformManager&, const GrDrawEffect&) SK_OVERRIDE {} | |
| 316 | |
| 317 private: | |
| 318 GrEffectEdgeType fEdgeType; | |
| 319 | |
| 320 typedef GrGLVertexEffect INHERITED; | |
| 321 }; | |
| 322 | |
| 323 GrGLCubicEffect::GrGLCubicEffect(const GrBackendEffectFactory& factory, | |
| 324 const GrDrawEffect& drawEffect) | |
| 325 : INHERITED (factory) { | |
| 326 const GrCubicEffect& ce = drawEffect.castEffect<GrCubicEffect>(); | |
| 327 fEdgeType = ce.getEdgeType(); | |
| 328 } | |
| 329 | |
| 330 void GrGLCubicEffect::emitCode(GrGLFullShaderBuilder* builder, | |
| 331 const GrDrawEffect& drawEffect, | |
| 332 EffectKey key, | |
| 333 const char* outputColor, | |
| 334 const char* inputColor, | |
| 335 const TransformedCoordsArray&, | |
| 336 const TextureSamplerArray& samplers) { | |
| 337 const char *vsName, *fsName; | |
| 338 | |
| 339 builder->addVarying(kVec4f_GrSLType, "CubicCoeffs", | |
| 340 &vsName, &fsName); | |
| 341 const SkString* attr0Name = | |
| 342 builder->getEffectAttributeName(drawEffect.getVertexAttribIndices()[0]); | |
| 343 builder->vsCodeAppendf("\t%s = %s;\n", vsName, attr0Name->c_str()); | |
| 344 | |
| 345 builder->fsCodeAppend("\t\tfloat edgeAlpha;\n"); | |
| 346 | |
| 347 switch (fEdgeType) { | |
| 348 case kHairlineAA_GrEffectEdgeType: { | |
| 349 SkAssertResult(builder->enableFeature( | |
| 350 GrGLShaderBuilder::kStandardDerivatives_GLSLFeature)); | |
| 351 builder->fsCodeAppendf("\t\tvec3 dklmdx = dFdx(%s.xyz);\n", fsName); | |
| 352 builder->fsCodeAppendf("\t\tvec3 dklmdy = dFdy(%s.xyz);\n", fsName); | |
| 353 builder->fsCodeAppendf("\t\tfloat dfdx =\n" | |
| 354 "\t\t3.0*%s.x*%s.x*dklmdx.x - %s.y*dklmdx.z - %s.z*dklmdx.y;\n", | |
| 355 fsName, fsName, fsName, fsName); | |
| 356 builder->fsCodeAppendf("\t\tfloat dfdy =\n" | |
| 357 "\t\t3.0*%s.x*%s.x*dklmdy.x - %s.y*dklmdy.z - %s.z*dklmdy.y;\n", | |
| 358 fsName, fsName, fsName, fsName); | |
| 359 builder->fsCodeAppend("\t\tvec2 gF = vec2(dfdx, dfdy);\n"); | |
| 360 builder->fsCodeAppend("\t\tfloat gFM = sqrt(dot(gF, gF));\n"); | |
| 361 builder->fsCodeAppendf("\t\tfloat func = %s.x*%s.x*%s.x - %s.y*%s.z;\n", | |
| 362 fsName, fsName, fsName, fsName, fsName); | |
| 363 builder->fsCodeAppend("\t\tfunc = abs(func);\n"); | |
| 364 builder->fsCodeAppend("\t\tedgeAlpha = func / gFM;\n"); | |
| 365 builder->fsCodeAppend("\t\tedgeAlpha = max(1.0 - edgeAlpha, 0.0);\n"); | |
| 366 // Add line below for smooth cubic ramp | |
| 367 // builder->fsCodeAppend("\t\tedgeAlpha = edgeAlpha*edgeAlpha*(3.0-2.0*edgeAlpha);\n"); | |
| 368 break; | |
| 369 } | |
| 370 case kFillAA_GrEffectEdgeType: { | |
| 371 SkAssertResult(builder->enableFeature( | |
| 372 GrGLShaderBuilder::kStandardDerivatives_GLSLFeature)); | |
| 373 builder->fsCodeAppendf("\t\tvec3 dklmdx = dFdx(%s.xyz);\n", fsName); | |
| 374 builder->fsCodeAppendf("\t\tvec3 dklmdy = dFdy(%s.xyz);\n", fsName); | |
| 375 builder->fsCodeAppendf("\t\tfloat dfdx =\n" | |
| 376 "\t\t3.0*%s.x*%s.x*dklmdx.x - %s.y*dklmdx.z - %s.z*dklmdx.y;\n", | |
| 377 fsName, fsName, fsName, fsName); | |
| 378 builder->fsCodeAppendf("\t\tfloat dfdy =\n" | |
| 379 "\t\t3.0*%s.x*%s.x*dklmdy.x - %s.y*dklmdy.z - %s.z*dklmdy.y;\n", | |
| 380 fsName, fsName, fsName, fsName); | |
| 381 builder->fsCodeAppend("\t\tvec2 gF = vec2(dfdx, dfdy);\n"); | |
| 382 builder->fsCodeAppend("\t\tfloat gFM = sqrt(dot(gF, gF));\n"); | |
| 383 builder->fsCodeAppendf("\t\tfloat func = %s.x*%s.x*%s.x - %s.y*%s.z;\n", | |
| 384 fsName, fsName, fsName, fsName, fsName); | |
| 385 builder->fsCodeAppend("\t\tedgeAlpha = func / gFM;\n"); | |
| 386 builder->fsCodeAppend("\t\tedgeAlpha = clamp(1.0 - edgeAlpha, 0.0, 1.0);\n"); | |
| 387 // Add line below for smooth cubic ramp | |
| 388 // builder->fsCodeAppend("\t\tedgeAlpha = edgeAlpha*edgeAlpha*(3.0-2.0*edgeAlpha);\n"); | |
| 389 break; | |
| 390 } | |
| 391 case kFillBW_GrEffectEdgeType: { | |
| 392 builder->fsCodeAppendf("\t\tedgeAlpha = %s.x*%s.x*%s.x - %s.y*%s.z;\n", | |
| 393 fsName, fsName, fsName, fsName, fsName); | |
| 394 builder->fsCodeAppend("\t\tedgeAlpha = float(edgeAlpha < 0.0);\n"); | |
| 395 break; | |
| 396 } | |
| 397 default: | |
| 398 GrCrash("Shouldn't get here"); | |
| 399 } | |
| 400 | |
| 401 builder->fsCodeAppendf("\t%s = %s;\n", outputColor, | |
| 402 (GrGLSLExpr4(inputColor) * GrGLSLExpr1("edgeAlpha")).c_str()); | |
| 403 } | |
| 404 | |
| 405 GrGLEffect::EffectKey GrGLCubicEffect::GenKey(const GrDrawEffect& drawEffect, const GrGLCaps&) { | |
| 406 const GrCubicEffect& ce = drawEffect.castEffect<GrCubicEffect>(); | |
| 407 return ce.isAntiAliased() ? (ce.isFilled() ? 0x0 : 0x1) : 0x2; | |
| 408 } | |
| 409 | |
| 410 ////////////////////////////////////////////////////////////////////////////// | |
| 411 | |
| 412 GrCubicEffect::~GrCubicEffect() {} | |
| 413 | |
| 414 const GrBackendEffectFactory& GrCubicEffect::getFactory() const { | |
| 415 return GrTBackendEffectFactory<GrCubicEffect>::getInstance(); | |
| 416 } | |
| 417 | |
| 418 GrCubicEffect::GrCubicEffect(GrEffectEdgeType edgeType) : GrVertexEffect() { | |
| 419 this->addVertexAttrib(kVec4f_GrSLType); | |
| 420 fEdgeType = edgeType; | |
| 421 } | |
| 422 | |
| 423 bool GrCubicEffect::onIsEqual(const GrEffect& other) const { | |
| 424 const GrCubicEffect& ce = CastEffect<GrCubicEffect>(other); | |
| 425 return (ce.fEdgeType == fEdgeType); | |
| 426 } | |
| 427 | |
| 428 ////////////////////////////////////////////////////////////////////////////// | |
| 429 | |
| 430 GR_DEFINE_EFFECT_TEST(GrCubicEffect); | |
| 431 | |
| 432 GrEffectRef* GrCubicEffect::TestCreate(SkRandom* random, | |
| 433 GrContext*, | |
| 434 const GrDrawTargetCaps& caps, | |
| 435 GrTexture*[]) { | |
| 436 GrEffectRef* effect; | |
| 437 do { | |
| 438 GrEffectEdgeType edgeType = static_cast<GrEffectEdgeType>( | |
| 439 random->nextULessThan(kGrEffectEdgeTypeCnt)); | |
| 440 effect = GrCubicEffect::Create(edgeType, caps); | |
| 441 } while (NULL == effect); | |
| 442 return effect; | |
| 443 } |
