| /* |
| * Copyright 2013 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #include "GrBezierEffect.h" |
| |
| #include "gl/GrGLEffect.h" |
| #include "gl/GrGLSL.h" |
| #include "GrTBackendEffectFactory.h" |
| |
| class GrGLConicEffect : public GrGLEffect { |
| public: |
| GrGLConicEffect(const GrBackendEffectFactory&, const GrDrawEffect&); |
| |
| virtual void emitCode(GrGLShaderBuilder* builder, |
| const GrDrawEffect& drawEffect, |
| EffectKey key, |
| const char* outputColor, |
| const char* inputColor, |
| const TextureSamplerArray&) SK_OVERRIDE; |
| |
| static inline EffectKey GenKey(const GrDrawEffect&, const GrGLCaps&); |
| |
| virtual void setData(const GrGLUniformManager&, const GrDrawEffect&) SK_OVERRIDE {} |
| |
| private: |
| GrBezierEdgeType fEdgeType; |
| |
| typedef GrGLEffect INHERITED; |
| }; |
| |
| GrGLConicEffect::GrGLConicEffect(const GrBackendEffectFactory& factory, |
| const GrDrawEffect& drawEffect) |
| : INHERITED (factory) { |
| const GrConicEffect& ce = drawEffect.castEffect<GrConicEffect>(); |
| fEdgeType = ce.getEdgeType(); |
| } |
| |
| void GrGLConicEffect::emitCode(GrGLShaderBuilder* builder, |
| const GrDrawEffect& drawEffect, |
| EffectKey key, |
| const char* outputColor, |
| const char* inputColor, |
| const TextureSamplerArray& samplers) { |
| const char *vsName, *fsName; |
| |
| builder->addVarying(kVec4f_GrSLType, "ConicCoeffs", |
| &vsName, &fsName); |
| const SkString* attr0Name = |
| builder->getEffectAttributeName(drawEffect.getVertexAttribIndices()[0]); |
| builder->vsCodeAppendf("\t%s = %s;\n", vsName, attr0Name->c_str()); |
| |
| builder->fsCodeAppend("\t\tfloat edgeAlpha;\n"); |
| |
| switch (fEdgeType) { |
| case kHairAA_GrBezierEdgeType: { |
| SkAssertResult(builder->enableFeature( |
| GrGLShaderBuilder::kStandardDerivatives_GLSLFeature)); |
| builder->fsCodeAppendf("\t\tvec3 dklmdx = dFdx(%s.xyz);\n", fsName); |
| builder->fsCodeAppendf("\t\tvec3 dklmdy = dFdy(%s.xyz);\n", fsName); |
| builder->fsCodeAppendf("\t\tfloat dfdx =\n" |
| "\t\t\t2.0*%s.x*dklmdx.x - %s.y*dklmdx.z - %s.z*dklmdx.y;\n", |
| fsName, fsName, fsName); |
| builder->fsCodeAppendf("\t\tfloat dfdy =\n" |
| "\t\t\t2.0*%s.x*dklmdy.x - %s.y*dklmdy.z - %s.z*dklmdy.y;\n", |
| fsName, fsName, fsName); |
| builder->fsCodeAppend("\t\tvec2 gF = vec2(dfdx, dfdy);\n"); |
| builder->fsCodeAppend("\t\tfloat gFM = sqrt(dot(gF, gF));\n"); |
| builder->fsCodeAppendf("\t\tfloat func = %s.x*%s.x - %s.y*%s.z;\n", fsName, fsName, |
| fsName, fsName); |
| builder->fsCodeAppend("\t\tfunc = abs(func);\n"); |
| builder->fsCodeAppend("\t\tedgeAlpha = func / gFM;\n"); |
| builder->fsCodeAppend("\t\tedgeAlpha = max(1.0 - edgeAlpha, 0.0);\n"); |
| // Add line below for smooth cubic ramp |
| // builder->fsCodeAppend("\t\tedgeAlpha = edgeAlpha*edgeAlpha*(3.0-2.0*edgeAlpha);\n"); |
| break; |
| } |
| case kFillAA_GrBezierEdgeType: { |
| SkAssertResult(builder->enableFeature( |
| GrGLShaderBuilder::kStandardDerivatives_GLSLFeature)); |
| builder->fsCodeAppendf("\t\tvec3 dklmdx = dFdx(%s.xyz);\n", fsName); |
| builder->fsCodeAppendf("\t\tvec3 dklmdy = dFdy(%s.xyz);\n", fsName); |
| builder->fsCodeAppendf("\t\tfloat dfdx =\n" |
| "\t\t\t2.0*%s.x*dklmdx.x - %s.y*dklmdx.z - %s.z*dklmdx.y;\n", |
| fsName, fsName, fsName); |
| builder->fsCodeAppendf("\t\tfloat dfdy =\n" |
| "\t\t\t2.0*%s.x*dklmdy.x - %s.y*dklmdy.z - %s.z*dklmdy.y;\n", |
| fsName, fsName, fsName); |
| builder->fsCodeAppend("\t\tvec2 gF = vec2(dfdx, dfdy);\n"); |
| builder->fsCodeAppend("\t\tfloat gFM = sqrt(dot(gF, gF));\n"); |
| builder->fsCodeAppendf("\t\tfloat func = %s.x*%s.x - %s.y*%s.z;\n", fsName, fsName, |
| fsName, fsName); |
| builder->fsCodeAppend("\t\tedgeAlpha = func / gFM;\n"); |
| builder->fsCodeAppend("\t\tedgeAlpha = clamp(1.0 - edgeAlpha, 0.0, 1.0);\n"); |
| // Add line below for smooth cubic ramp |
| // builder->fsCodeAppend("\t\tedgeAlpha = edgeAlpha*edgeAlpha*(3.0-2.0*edgeAlpha);\n"); |
| break; |
| } |
| case kFillNoAA_GrBezierEdgeType: { |
| builder->fsCodeAppendf("\t\tedgeAlpha = %s.x*%s.x - %s.y*%s.z;\n", fsName, fsName, |
| fsName, fsName); |
| builder->fsCodeAppend("\t\tedgeAlpha = float(edgeAlpha < 0.0);\n"); |
| break; |
| } |
| } |
| |
| SkString modulate; |
| GrGLSLModulatef<4>(&modulate, inputColor, "edgeAlpha"); |
| builder->fsCodeAppendf("\t%s = %s;\n", outputColor, modulate.c_str()); |
| } |
| |
| GrGLEffect::EffectKey GrGLConicEffect::GenKey(const GrDrawEffect& drawEffect, const GrGLCaps&) { |
| const GrConicEffect& ce = drawEffect.castEffect<GrConicEffect>(); |
| return ce.isAntiAliased() ? (ce.isFilled() ? 0x0 : 0x1) : 0x2; |
| } |
| |
| ////////////////////////////////////////////////////////////////////////////// |
| |
| GrConicEffect::~GrConicEffect() {} |
| |
| const GrBackendEffectFactory& GrConicEffect::getFactory() const { |
| return GrTBackendEffectFactory<GrConicEffect>::getInstance(); |
| } |
| |
| GrConicEffect::GrConicEffect(GrBezierEdgeType edgeType) : GrEffect() { |
| this->addVertexAttrib(kVec4f_GrSLType); |
| fEdgeType = edgeType; |
| } |
| |
| bool GrConicEffect::onIsEqual(const GrEffect& other) const { |
| const GrConicEffect& ce = CastEffect<GrConicEffect>(other); |
| return (ce.fEdgeType == fEdgeType); |
| } |
| |
| ////////////////////////////////////////////////////////////////////////////// |
| |
| GR_DEFINE_EFFECT_TEST(GrConicEffect); |
| |
| GrEffectRef* GrConicEffect::TestCreate(SkMWCRandom* random, |
| GrContext*, |
| const GrDrawTargetCaps& caps, |
| GrTexture*[]) { |
| const GrBezierEdgeType edgeType = static_cast<GrBezierEdgeType>(random->nextULessThan(3)); |
| return GrConicEffect::Create(edgeType, caps); |
| } |
| |
| ////////////////////////////////////////////////////////////////////////////// |
| // Quad |
| ////////////////////////////////////////////////////////////////////////////// |
| |
| class GrGLQuadEffect : public GrGLEffect { |
| public: |
| GrGLQuadEffect(const GrBackendEffectFactory&, const GrDrawEffect&); |
| |
| virtual void emitCode(GrGLShaderBuilder* builder, |
| const GrDrawEffect& drawEffect, |
| EffectKey key, |
| const char* outputColor, |
| const char* inputColor, |
| const TextureSamplerArray&) SK_OVERRIDE; |
| |
| static inline EffectKey GenKey(const GrDrawEffect&, const GrGLCaps&); |
| |
| virtual void setData(const GrGLUniformManager&, const GrDrawEffect&) SK_OVERRIDE {} |
| |
| private: |
| GrBezierEdgeType fEdgeType; |
| |
| typedef GrGLEffect INHERITED; |
| }; |
| |
| GrGLQuadEffect::GrGLQuadEffect(const GrBackendEffectFactory& factory, |
| const GrDrawEffect& drawEffect) |
| : INHERITED (factory) { |
| const GrQuadEffect& ce = drawEffect.castEffect<GrQuadEffect>(); |
| fEdgeType = ce.getEdgeType(); |
| } |
| |
| void GrGLQuadEffect::emitCode(GrGLShaderBuilder* builder, |
| const GrDrawEffect& drawEffect, |
| EffectKey key, |
| const char* outputColor, |
| const char* inputColor, |
| const TextureSamplerArray& samplers) { |
| const char *vsName, *fsName; |
| |
| const SkString* attrName = |
| builder->getEffectAttributeName(drawEffect.getVertexAttribIndices()[0]); |
| builder->fsCodeAppendf("\t\tfloat edgeAlpha;\n"); |
| |
| builder->addVarying(kVec4f_GrSLType, "HairQuadEdge", &vsName, &fsName); |
| |
| switch (fEdgeType) { |
| case kHairAA_GrBezierEdgeType: { |
| SkAssertResult(builder->enableFeature( |
| GrGLShaderBuilder::kStandardDerivatives_GLSLFeature)); |
| builder->fsCodeAppendf("\t\tvec2 duvdx = dFdx(%s.xy);\n", fsName); |
| builder->fsCodeAppendf("\t\tvec2 duvdy = dFdy(%s.xy);\n", fsName); |
| builder->fsCodeAppendf("\t\tvec2 gF = vec2(2.0*%s.x*duvdx.x - duvdx.y,\n" |
| "\t\t 2.0*%s.x*duvdy.x - duvdy.y);\n", |
| fsName, fsName); |
| builder->fsCodeAppendf("\t\tedgeAlpha = (%s.x*%s.x - %s.y);\n", fsName, fsName, |
| fsName); |
| builder->fsCodeAppend("\t\tedgeAlpha = sqrt(edgeAlpha*edgeAlpha / dot(gF, gF));\n"); |
| builder->fsCodeAppend("\t\tedgeAlpha = max(1.0 - edgeAlpha, 0.0);\n"); |
| // Add line below for smooth cubic ramp |
| // builder->fsCodeAppend("\t\tedgeAlpha = edgeAlpha*edgeAlpha*(3.0-2.0*edgeAlpha);\n"); |
| break; |
| } |
| case kFillAA_GrBezierEdgeType: { |
| SkAssertResult(builder->enableFeature( |
| GrGLShaderBuilder::kStandardDerivatives_GLSLFeature)); |
| builder->fsCodeAppendf("\t\tvec2 duvdx = dFdx(%s.xy);\n", fsName); |
| builder->fsCodeAppendf("\t\tvec2 duvdy = dFdy(%s.xy);\n", fsName); |
| builder->fsCodeAppendf("\t\tvec2 gF = vec2(2.0*%s.x*duvdx.x - duvdx.y,\n" |
| "\t\t 2.0*%s.x*duvdy.x - duvdy.y);\n", |
| fsName, fsName); |
| builder->fsCodeAppendf("\t\tedgeAlpha = (%s.x*%s.x - %s.y);\n", fsName, fsName, |
| fsName); |
| builder->fsCodeAppend("\t\tedgeAlpha = edgeAlpha / sqrt(dot(gF, gF));\n"); |
| builder->fsCodeAppend("\t\tedgeAlpha = clamp(1.0 - edgeAlpha, 0.0, 1.0);\n"); |
| // Add line below for smooth cubic ramp |
| // builder->fsCodeAppend("\t\tedgeAlpha = edgeAlpha*edgeAlpha*(3.0-2.0*edgeAlpha);\n"); |
| break; |
| } |
| case kFillNoAA_GrBezierEdgeType: { |
| builder->fsCodeAppendf("\t\tedgeAlpha = (%s.x*%s.x - %s.y);\n", fsName, fsName, |
| fsName); |
| builder->fsCodeAppend("\t\tedgeAlpha = float(edgeAlpha < 0.0);\n"); |
| break; |
| } |
| } |
| |
| SkString modulate; |
| GrGLSLModulatef<4>(&modulate, inputColor, "edgeAlpha"); |
| builder->fsCodeAppendf("\t%s = %s;\n", outputColor, modulate.c_str()); |
| |
| builder->vsCodeAppendf("\t%s = %s;\n", vsName, attrName->c_str()); |
| } |
| |
| GrGLEffect::EffectKey GrGLQuadEffect::GenKey(const GrDrawEffect& drawEffect, const GrGLCaps&) { |
| const GrQuadEffect& ce = drawEffect.castEffect<GrQuadEffect>(); |
| return ce.isAntiAliased() ? (ce.isFilled() ? 0x0 : 0x1) : 0x2; |
| } |
| |
| ////////////////////////////////////////////////////////////////////////////// |
| |
| GrQuadEffect::~GrQuadEffect() {} |
| |
| const GrBackendEffectFactory& GrQuadEffect::getFactory() const { |
| return GrTBackendEffectFactory<GrQuadEffect>::getInstance(); |
| } |
| |
| GrQuadEffect::GrQuadEffect(GrBezierEdgeType edgeType) : GrEffect() { |
| this->addVertexAttrib(kVec4f_GrSLType); |
| fEdgeType = edgeType; |
| } |
| |
| bool GrQuadEffect::onIsEqual(const GrEffect& other) const { |
| const GrQuadEffect& ce = CastEffect<GrQuadEffect>(other); |
| return (ce.fEdgeType == fEdgeType); |
| } |
| |
| ////////////////////////////////////////////////////////////////////////////// |
| |
| GR_DEFINE_EFFECT_TEST(GrQuadEffect); |
| |
| GrEffectRef* GrQuadEffect::TestCreate(SkMWCRandom* random, |
| GrContext*, |
| const GrDrawTargetCaps& caps, |
| GrTexture*[]) { |
| const GrBezierEdgeType edgeType = static_cast<GrBezierEdgeType>(random->nextULessThan(3)); |
| return GrQuadEffect::Create(edgeType, caps); |
| } |
| |
| ////////////////////////////////////////////////////////////////////////////// |
| // Cubic |
| ////////////////////////////////////////////////////////////////////////////// |
| |
| class GrGLCubicEffect : public GrGLEffect { |
| public: |
| GrGLCubicEffect(const GrBackendEffectFactory&, const GrDrawEffect&); |
| |
| virtual void emitCode(GrGLShaderBuilder* builder, |
| const GrDrawEffect& drawEffect, |
| EffectKey key, |
| const char* outputColor, |
| const char* inputColor, |
| const TextureSamplerArray&) SK_OVERRIDE; |
| |
| static inline EffectKey GenKey(const GrDrawEffect&, const GrGLCaps&); |
| |
| virtual void setData(const GrGLUniformManager&, const GrDrawEffect&) SK_OVERRIDE {} |
| |
| private: |
| GrBezierEdgeType fEdgeType; |
| |
| typedef GrGLEffect INHERITED; |
| }; |
| |
| GrGLCubicEffect::GrGLCubicEffect(const GrBackendEffectFactory& factory, |
| const GrDrawEffect& drawEffect) |
| : INHERITED (factory) { |
| const GrCubicEffect& ce = drawEffect.castEffect<GrCubicEffect>(); |
| fEdgeType = ce.getEdgeType(); |
| } |
| |
| void GrGLCubicEffect::emitCode(GrGLShaderBuilder* builder, |
| const GrDrawEffect& drawEffect, |
| EffectKey key, |
| const char* outputColor, |
| const char* inputColor, |
| const TextureSamplerArray& samplers) { |
| const char *vsName, *fsName; |
| |
| builder->addVarying(kVec4f_GrSLType, "CubicCoeffs", |
| &vsName, &fsName); |
| const SkString* attr0Name = |
| builder->getEffectAttributeName(drawEffect.getVertexAttribIndices()[0]); |
| builder->vsCodeAppendf("\t%s = %s;\n", vsName, attr0Name->c_str()); |
| |
| builder->fsCodeAppend("\t\tfloat edgeAlpha;\n"); |
| |
| switch (fEdgeType) { |
| case kHairAA_GrBezierEdgeType: { |
| SkAssertResult(builder->enableFeature( |
| GrGLShaderBuilder::kStandardDerivatives_GLSLFeature)); |
| builder->fsCodeAppendf("\t\tvec3 dklmdx = dFdx(%s.xyz);\n", fsName); |
| builder->fsCodeAppendf("\t\tvec3 dklmdy = dFdy(%s.xyz);\n", fsName); |
| builder->fsCodeAppendf("\t\tfloat dfdx =\n" |
| "\t\t3.0*%s.x*%s.x*dklmdx.x - %s.y*dklmdx.z - %s.z*dklmdx.y;\n", |
| fsName, fsName, fsName, fsName); |
| builder->fsCodeAppendf("\t\tfloat dfdy =\n" |
| "\t\t3.0*%s.x*%s.x*dklmdy.x - %s.y*dklmdy.z - %s.z*dklmdy.y;\n", |
| fsName, fsName, fsName, fsName); |
| builder->fsCodeAppend("\t\tvec2 gF = vec2(dfdx, dfdy);\n"); |
| builder->fsCodeAppend("\t\tfloat gFM = sqrt(dot(gF, gF));\n"); |
| builder->fsCodeAppendf("\t\tfloat func = %s.x*%s.x*%s.x - %s.y*%s.z;\n", |
| fsName, fsName, fsName, fsName, fsName); |
| builder->fsCodeAppend("\t\tfunc = abs(func);\n"); |
| builder->fsCodeAppend("\t\tedgeAlpha = func / gFM;\n"); |
| builder->fsCodeAppend("\t\tedgeAlpha = max(1.0 - edgeAlpha, 0.0);\n"); |
| // Add line below for smooth cubic ramp |
| // builder->fsCodeAppend("\t\tedgeAlpha = edgeAlpha*edgeAlpha*(3.0-2.0*edgeAlpha);\n"); |
| break; |
| } |
| case kFillAA_GrBezierEdgeType: { |
| SkAssertResult(builder->enableFeature( |
| GrGLShaderBuilder::kStandardDerivatives_GLSLFeature)); |
| builder->fsCodeAppendf("\t\tvec3 dklmdx = dFdx(%s.xyz);\n", fsName); |
| builder->fsCodeAppendf("\t\tvec3 dklmdy = dFdy(%s.xyz);\n", fsName); |
| builder->fsCodeAppendf("\t\tfloat dfdx =\n" |
| "\t\t3.0*%s.x*%s.x*dklmdx.x - %s.y*dklmdx.z - %s.z*dklmdx.y;\n", |
| fsName, fsName, fsName, fsName); |
| builder->fsCodeAppendf("\t\tfloat dfdy =\n" |
| "\t\t3.0*%s.x*%s.x*dklmdy.x - %s.y*dklmdy.z - %s.z*dklmdy.y;\n", |
| fsName, fsName, fsName, fsName); |
| builder->fsCodeAppend("\t\tvec2 gF = vec2(dfdx, dfdy);\n"); |
| builder->fsCodeAppend("\t\tfloat gFM = sqrt(dot(gF, gF));\n"); |
| builder->fsCodeAppendf("\t\tfloat func = %s.x*%s.x*%s.x - %s.y*%s.z;\n", |
| fsName, fsName, fsName, fsName, fsName); |
| builder->fsCodeAppend("\t\tedgeAlpha = func / gFM;\n"); |
| builder->fsCodeAppend("\t\tedgeAlpha = clamp(1.0 - edgeAlpha, 0.0, 1.0);\n"); |
| // Add line below for smooth cubic ramp |
| // builder->fsCodeAppend("\t\tedgeAlpha = edgeAlpha*edgeAlpha*(3.0-2.0*edgeAlpha);\n"); |
| break; |
| } |
| case kFillNoAA_GrBezierEdgeType: { |
| builder->fsCodeAppendf("\t\tedgeAlpha = %s.x*%s.x*%s.x - %s.y*%s.z;\n", |
| fsName, fsName, fsName, fsName, fsName); |
| builder->fsCodeAppend("\t\tedgeAlpha = float(edgeAlpha < 0.0);\n"); |
| break; |
| } |
| } |
| |
| SkString modulate; |
| GrGLSLModulatef<4>(&modulate, inputColor, "edgeAlpha"); |
| builder->fsCodeAppendf("\t%s = %s;\n", outputColor, modulate.c_str()); |
| } |
| |
| GrGLEffect::EffectKey GrGLCubicEffect::GenKey(const GrDrawEffect& drawEffect, const GrGLCaps&) { |
| const GrCubicEffect& ce = drawEffect.castEffect<GrCubicEffect>(); |
| return ce.isAntiAliased() ? (ce.isFilled() ? 0x0 : 0x1) : 0x2; |
| } |
| |
| ////////////////////////////////////////////////////////////////////////////// |
| |
| GrCubicEffect::~GrCubicEffect() {} |
| |
| const GrBackendEffectFactory& GrCubicEffect::getFactory() const { |
| return GrTBackendEffectFactory<GrCubicEffect>::getInstance(); |
| } |
| |
| GrCubicEffect::GrCubicEffect(GrBezierEdgeType edgeType) : GrEffect() { |
| this->addVertexAttrib(kVec4f_GrSLType); |
| fEdgeType = edgeType; |
| } |
| |
| bool GrCubicEffect::onIsEqual(const GrEffect& other) const { |
| const GrCubicEffect& ce = CastEffect<GrCubicEffect>(other); |
| return (ce.fEdgeType == fEdgeType); |
| } |
| |
| ////////////////////////////////////////////////////////////////////////////// |
| |
| GR_DEFINE_EFFECT_TEST(GrCubicEffect); |
| |
| GrEffectRef* GrCubicEffect::TestCreate(SkMWCRandom* random, |
| GrContext*, |
| const GrDrawTargetCaps& caps, |
| GrTexture*[]) { |
| const GrBezierEdgeType edgeType = static_cast<GrBezierEdgeType>(random->nextULessThan(3)); |
| return GrCubicEffect::Create(edgeType, caps); |
| } |