The Tor Browser: gfx/skia/trunk/src/gpu/effects/GrBezierEffect.cpp@6474c204b198 (annotated)

gfx/skia/trunk/src/gpu/effects/GrBezierEffect.cpp@6474c204b198 (annotated)

gfx/skia/trunk/src/gpu/effects/GrBezierEffect.cpp

Wed, 31 Dec 2014 06:09:35 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Wed, 31 Dec 2014 06:09:35 +0100
changeset 0: 6474c204b198
permissions: -rw-r--r--

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

 /*
  * 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 "gl/GrGLVertexEffect.h"
 #include "GrTBackendEffectFactory.h"
 class GrGLConicEffect : public GrGLVertexEffect {
 public:
     GrGLConicEffect(const GrBackendEffectFactory&, const GrDrawEffect&);
     virtual void emitCode(GrGLFullShaderBuilder* builder,
                           const GrDrawEffect& drawEffect,
                           EffectKey key,
                           const char* outputColor,
                           const char* inputColor,
                           const TransformedCoordsArray&,
                           const TextureSamplerArray&) SK_OVERRIDE;
     static inline EffectKey GenKey(const GrDrawEffect&, const GrGLCaps&);
     virtual void setData(const GrGLUniformManager&, const GrDrawEffect&) SK_OVERRIDE {}
 private:
     GrEffectEdgeType fEdgeType;
     typedef GrGLVertexEffect INHERITED;
 };
 GrGLConicEffect::GrGLConicEffect(const GrBackendEffectFactory& factory,
                                  const GrDrawEffect& drawEffect)
     : INHERITED (factory) {
     const GrConicEffect& ce = drawEffect.castEffect<GrConicEffect>();
     fEdgeType = ce.getEdgeType();
 }
 void GrGLConicEffect::emitCode(GrGLFullShaderBuilder* builder,
                                const GrDrawEffect& drawEffect,
                                EffectKey key,
                                const char* outputColor,
                                const char* inputColor,
                                const TransformedCoordsArray&,
                                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 kHairlineAA_GrEffectEdgeType: {
             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_GrEffectEdgeType: {
             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 kFillBW_GrEffectEdgeType: {
             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;
         }
         default:
             GrCrash("Shouldn't get here");
     }
     builder->fsCodeAppendf("\t%s = %s;\n", outputColor,
                            (GrGLSLExpr4(inputColor) * GrGLSLExpr1("edgeAlpha")).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(GrEffectEdgeType edgeType) : GrVertexEffect() {
     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(SkRandom* random,
                                              GrContext*,
                                              const GrDrawTargetCaps& caps,
                                              GrTexture*[]) {
     GrEffectRef* effect;
     do {
         GrEffectEdgeType edgeType = static_cast<GrEffectEdgeType>(
                                                     random->nextULessThan(kGrEffectEdgeTypeCnt));
         effect = GrConicEffect::Create(edgeType, caps);
     } while (NULL == effect);
     return effect;
 }
 //////////////////////////////////////////////////////////////////////////////
 // Quad
 //////////////////////////////////////////////////////////////////////////////
 class GrGLQuadEffect : public GrGLVertexEffect {
 public:
     GrGLQuadEffect(const GrBackendEffectFactory&, const GrDrawEffect&);
     virtual void emitCode(GrGLFullShaderBuilder* builder,
                           const GrDrawEffect& drawEffect,
                           EffectKey key,
                           const char* outputColor,
                           const char* inputColor,
                           const TransformedCoordsArray&,
                           const TextureSamplerArray&) SK_OVERRIDE;
     static inline EffectKey GenKey(const GrDrawEffect&, const GrGLCaps&);
     virtual void setData(const GrGLUniformManager&, const GrDrawEffect&) SK_OVERRIDE {}
 private:
     GrEffectEdgeType fEdgeType;
     typedef GrGLVertexEffect INHERITED;
 };
 GrGLQuadEffect::GrGLQuadEffect(const GrBackendEffectFactory& factory,
                                  const GrDrawEffect& drawEffect)
     : INHERITED (factory) {
     const GrQuadEffect& ce = drawEffect.castEffect<GrQuadEffect>();
     fEdgeType = ce.getEdgeType();
 }
 void GrGLQuadEffect::emitCode(GrGLFullShaderBuilder* builder,
                               const GrDrawEffect& drawEffect,
                               EffectKey key,
                               const char* outputColor,
                               const char* inputColor,
                               const TransformedCoordsArray&,
                               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 kHairlineAA_GrEffectEdgeType: {
             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_GrEffectEdgeType: {
             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 kFillBW_GrEffectEdgeType: {
             builder->fsCodeAppendf("\t\tedgeAlpha = (%s.x*%s.x - %s.y);\n", fsName, fsName,
                                    fsName);
             builder->fsCodeAppend("\t\tedgeAlpha = float(edgeAlpha < 0.0);\n");
             break;
         }
         default:
             GrCrash("Shouldn't get here");
     }
     builder->fsCodeAppendf("\t%s = %s;\n", outputColor,
                            (GrGLSLExpr4(inputColor) * GrGLSLExpr1("edgeAlpha")).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(GrEffectEdgeType edgeType) : GrVertexEffect() {
     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(SkRandom* random,
                                              GrContext*,
                                              const GrDrawTargetCaps& caps,
                                              GrTexture*[]) {
     GrEffectRef* effect;
     do {
         GrEffectEdgeType edgeType = static_cast<GrEffectEdgeType>(
                                                     random->nextULessThan(kGrEffectEdgeTypeCnt));
         effect = GrQuadEffect::Create(edgeType, caps);
     } while (NULL == effect);
     return effect;
 }
 //////////////////////////////////////////////////////////////////////////////
 // Cubic
 //////////////////////////////////////////////////////////////////////////////
 class GrGLCubicEffect : public GrGLVertexEffect {
 public:
     GrGLCubicEffect(const GrBackendEffectFactory&, const GrDrawEffect&);
     virtual void emitCode(GrGLFullShaderBuilder* builder,
                           const GrDrawEffect& drawEffect,
                           EffectKey key,
                           const char* outputColor,
                           const char* inputColor,
                           const TransformedCoordsArray&,
                           const TextureSamplerArray&) SK_OVERRIDE;
     static inline EffectKey GenKey(const GrDrawEffect&, const GrGLCaps&);
     virtual void setData(const GrGLUniformManager&, const GrDrawEffect&) SK_OVERRIDE {}
 private:
     GrEffectEdgeType fEdgeType;
     typedef GrGLVertexEffect INHERITED;
 };
 GrGLCubicEffect::GrGLCubicEffect(const GrBackendEffectFactory& factory,
                                  const GrDrawEffect& drawEffect)
     : INHERITED (factory) {
     const GrCubicEffect& ce = drawEffect.castEffect<GrCubicEffect>();
     fEdgeType = ce.getEdgeType();
 }
 void GrGLCubicEffect::emitCode(GrGLFullShaderBuilder* builder,
                                const GrDrawEffect& drawEffect,
                                EffectKey key,
                                const char* outputColor,
                                const char* inputColor,
                                const TransformedCoordsArray&,
                                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 kHairlineAA_GrEffectEdgeType: {
             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_GrEffectEdgeType: {
             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 kFillBW_GrEffectEdgeType: {
             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;
         }
         default:
             GrCrash("Shouldn't get here");
     }
     builder->fsCodeAppendf("\t%s = %s;\n", outputColor,
                            (GrGLSLExpr4(inputColor) * GrGLSLExpr1("edgeAlpha")).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(GrEffectEdgeType edgeType) : GrVertexEffect() {
     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(SkRandom* random,
                                              GrContext*,
                                              const GrDrawTargetCaps& caps,
                                              GrTexture*[]) {
     GrEffectRef* effect;
     do {
         GrEffectEdgeType edgeType = static_cast<GrEffectEdgeType>(
                                                     random->nextULessThan(kGrEffectEdgeTypeCnt));
         effect = GrCubicEffect::Create(edgeType, caps);
     } while (NULL == effect);
     return effect;
 }

The Tor Browser / annotate

gfx/skia/trunk/src/gpu/effects/GrBezierEffect.cpp@6474c204b198 (annotated)

gfx/skia/trunk/src/gpu/effects/GrBezierEffect.cpp