Potentially optimize some GrGLEffects for known input color values

src/gpu/effects/GrBezierEffect.cpp

 /*
  * 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 GrGLSLExpr4& 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:
     GrBezierEdgeType 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 GrGLSLExpr4& 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());
 
@@ skipping 45 matching lines @@
         }
         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;
         }
     }
 
     builder->fsCodeAppendf("\t%s = %s;\n", outputColor,
-                           (GrGLSLExpr4(inputColor) * GrGLSLExpr1("edgeAlpha")).c_str());
+                           (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() {}
@@ skipping 29 matching lines @@
 //////////////////////////////////////////////////////////////////////////////
 
 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 GrGLSLExpr4& 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:
     GrBezierEdgeType 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 GrGLSLExpr4& 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);
 
@@ skipping 32 matching lines @@
         }
         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;
         }
     }
 
     builder->fsCodeAppendf("\t%s = %s;\n", outputColor,
-                           (GrGLSLExpr4(inputColor) * GrGLSLExpr1("edgeAlpha")).c_str());
+                           (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;
 }
 
@@ skipping 32 matching lines @@
 //////////////////////////////////////////////////////////////////////////////
 
 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 GrGLSLExpr4& 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:
     GrBezierEdgeType 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 GrGLSLExpr4& 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());
 
@@ skipping 45 matching lines @@
         }
         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;
         }
     }
 
     builder->fsCodeAppendf("\t%s = %s;\n", outputColor,
-                           (GrGLSLExpr4(inputColor) * GrGLSLExpr1("edgeAlpha")).c_str());
+                           (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() {}
@@ skipping 16 matching lines @@
 
 GR_DEFINE_EFFECT_TEST(GrCubicEffect);
 
 GrEffectRef* GrCubicEffect::TestCreate(SkRandom* random,
                                              GrContext*,
                                              const GrDrawTargetCaps& caps,
                                              GrTexture*[]) {
     const GrBezierEdgeType edgeType = static_cast<GrBezierEdgeType>(random->nextULessThan(3));
     return GrCubicEffect::Create(edgeType, caps);
 }