Adds local coords to GrEffect system.

src/gpu/effects/GrTextureDomainEffect.cpp

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "GrTextureDomainEffect.h"
 #include "GrSimpleTextureEffect.h"
 #include "GrTBackendEffectFactory.h"
 #include "gl/GrGLEffect.h"
 #include "gl/GrGLEffectMatrix.h"
 #include "SkFloatingPoint.h"
 
 class GrGLTextureDomainEffect : public GrGLEffect {
 public:
-    GrGLTextureDomainEffect(const GrBackendEffectFactory&, const GrEffectRef&);
+    GrGLTextureDomainEffect(const GrBackendEffectFactory&, const GrDrawEffect&);
 
     virtual void emitCode(GrGLShaderBuilder*,
-                          const GrEffectStage&,
+                          const GrDrawEffect&,
                           EffectKey,
-                          const char* vertexCoords,
                           const char* outputColor,
                           const char* inputColor,
                           const TextureSamplerArray&) SK_OVERRIDE;
 
-    virtual void setData(const GrGLUniformManager&, const GrEffectStage&) SK_OVERRIDE;
+    virtual void setData(const GrGLUniformManager&, const GrDrawEffect&) SK_OVERRIDE;
 
-    static inline EffectKey GenKey(const GrEffectStage&, const GrGLCaps&);
+    static inline EffectKey GenKey(const GrDrawEffect&, const GrGLCaps&);
 
 private:
     GrGLUniformManager::UniformHandle fNameUni;
     GrGLEffectMatrix                  fEffectMatrix;
     GrGLfloat                         fPrevDomain[4];
 
     typedef GrGLEffect INHERITED;
 };
 
 GrGLTextureDomainEffect::GrGLTextureDomainEffect(const GrBackendEffectFactory& factory,
-                                                 const GrEffectRef&)
+                                                 const GrDrawEffect& drawEffect)
     : INHERITED(factory)
-    , fNameUni(GrGLUniformManager::kInvalidUniformHandle) {
+    , fNameUni(GrGLUniformManager::kInvalidUniformHandle)
+    , fEffectMatrix(drawEffect.castEffect<GrTextureDomainEffect>().coordsType()) {
     fPrevDomain[0] = SK_FloatNaN;
 }
 
 void GrGLTextureDomainEffect::emitCode(GrGLShaderBuilder* builder,
-                                       const GrEffectStage& stage,
+                                       const GrDrawEffect& drawEffect,
                                        EffectKey key,
-                                       const char* vertexCoords,
                                        const char* outputColor,
                                        const char* inputColor,
                                        const TextureSamplerArray& samplers) {
-    const GrTextureDomainEffect& effect = GetEffectFromStage<GrTextureDomainEffect>(stage);
+    const GrTextureDomainEffect& texDom = drawEffect.castEffect<GrTextureDomainEffect>();
 
     const char* coords;
-    fEffectMatrix.emitCodeMakeFSCoords2D(builder, key, vertexCoords, &coords);
+    fEffectMatrix.emitCodeMakeFSCoords2D(builder, key, &coords);
     const char* domain;
     fNameUni = builder->addUniform(GrGLShaderBuilder::kFragment_ShaderType,
                                     kVec4f_GrSLType, "TexDom", &domain);
-    if (GrTextureDomainEffect::kClamp_WrapMode == effect.wrapMode()) {
+    if (GrTextureDomainEffect::kClamp_WrapMode == texDom.wrapMode()) {
 
         builder->fsCodeAppendf("\tvec2 clampCoord = clamp(%s, %s.xy, %s.zw);\n",
                                 coords, domain, domain);
 
         builder->fsCodeAppendf("\t%s = ", outputColor);
         builder->appendTextureLookupAndModulate(GrGLShaderBuilder::kFragment_ShaderType,
                                                 inputColor,
                                                 samplers[0],
                                                 "clampCoord");
         builder->fsCodeAppend(";\n");
     } else {
-        GrAssert(GrTextureDomainEffect::kDecal_WrapMode == effect.wrapMode());
+        GrAssert(GrTextureDomainEffect::kDecal_WrapMode == texDom.wrapMode());
 
         if (kImagination_GrGLVendor == builder->ctxInfo().vendor()) {
             // On the NexusS and GalaxyNexus, the other path (with the 'any'
             // call) causes the compilation error "Calls to any function that
             // may require a gradient calculation inside a conditional block
             // may return undefined results". This appears to be an issue with
             // the 'any' call since even the simple "result=black; if (any())
             // result=white;" code fails to compile.
             builder->fsCodeAppend("\tvec4 outside = vec4(0.0, 0.0, 0.0, 0.0);\n");
             builder->fsCodeAppend("\tvec4 inside = ");
@@ skipping 16 matching lines @@
             builder->fsCodeAppendf("\t%s = any(outside) ? vec4(0.0, 0.0, 0.0, 0.0) : ", outputColor);
             builder->appendTextureLookupAndModulate(GrGLShaderBuilder::kFragment_ShaderType,
                                                     inputColor,
                                                     samplers[0],
                                                     coords);
             builder->fsCodeAppend(";\n");
         }
     }
 }
 
-void GrGLTextureDomainEffect::setData(const GrGLUniformManager& uman, const GrEffectStage& stage) {
-    const GrTextureDomainEffect& effect = GetEffectFromStage<GrTextureDomainEffect>(stage);
-    const GrRect& domain = effect.domain();
+void GrGLTextureDomainEffect::setData(const GrGLUniformManager& uman,
+                                      const GrDrawEffect& drawEffect) {
+    const GrTextureDomainEffect& texDom = drawEffect.castEffect<GrTextureDomainEffect>();
+    const GrRect& domain = texDom.domain();
 
     float values[4] = {
         SkScalarToFloat(domain.left()),
         SkScalarToFloat(domain.top()),
         SkScalarToFloat(domain.right()),
         SkScalarToFloat(domain.bottom())
     };
     // vertical flip if necessary
-    if (kBottomLeft_GrSurfaceOrigin == effect.texture(0)->origin()) {
+    if (kBottomLeft_GrSurfaceOrigin == texDom.texture(0)->origin()) {
         values[1] = 1.0f - values[1];
         values[3] = 1.0f - values[3];
         // The top and bottom were just flipped, so correct the ordering
         // of elements so that values = (l, t, r, b).
         SkTSwap(values[1], values[3]);
     }
     if (0 != memcmp(values, fPrevDomain, 4 * sizeof(GrGLfloat))) {
         uman.set4fv(fNameUni, 0, 1, values);
     }
     fEffectMatrix.setData(uman,
-                          effect.getMatrix(),
-                          stage.getCoordChangeMatrix(),
-                          effect.texture(0));
+                          texDom.getMatrix(),
+                          drawEffect,
+                          texDom.texture(0));
 }
 
-GrGLEffect::EffectKey GrGLTextureDomainEffect::GenKey(const GrEffectStage& stage, const GrGLCaps&) {
-    const GrTextureDomainEffect& effect = GetEffectFromStage<GrTextureDomainEffect>(stage);
-    EffectKey key = effect.wrapMode();
+GrGLEffect::EffectKey GrGLTextureDomainEffect::GenKey(const GrDrawEffect& drawEffect,
+                                                      const GrGLCaps&) {
+    const GrTextureDomainEffect& texDom = drawEffect.castEffect<GrTextureDomainEffect>();
+    EffectKey key = texDom.wrapMode();
     key <<= GrGLEffectMatrix::kKeyBits;
-    EffectKey matrixKey = GrGLEffectMatrix::GenKey(effect.getMatrix(),
-                                                   stage.getCoordChangeMatrix(),
-                                                   effect.texture(0));
+    EffectKey matrixKey = GrGLEffectMatrix::GenKey(texDom.getMatrix(),
+                                                   drawEffect,
+                                                   texDom.coordsType(),
+                                                   texDom.texture(0));
     return key | matrixKey;
 }
 
 
 ///////////////////////////////////////////////////////////////////////////////
 
 GrEffectRef* GrTextureDomainEffect::Create(GrTexture* texture,
                                            const SkMatrix& matrix,
                                            const GrRect& domain,
                                            WrapMode wrapMode,
-                                           bool bilerp) {
+                                           bool bilerp,
+                                           CoordsType coordsType) {
     static const SkRect kFullRect = {0, 0, SK_Scalar1, SK_Scalar1};
     if (kClamp_WrapMode == wrapMode && domain.contains(kFullRect)) {
         return GrSimpleTextureEffect::Create(texture, matrix, bilerp);
     } else {
         SkRect clippedDomain;
         // We don't currently handle domains that are empty or don't intersect the texture.
         // It is OK if the domain rect is a line or point, but it should not be inverted. We do not
         // handle rects that do not intersect the [0..1]x[0..1] rect.
         GrAssert(domain.fLeft <= domain.fRight);
         GrAssert(domain.fTop <= domain.fBottom);
         clippedDomain.fLeft = SkMaxScalar(domain.fLeft, kFullRect.fLeft);
         clippedDomain.fRight = SkMinScalar(domain.fRight, kFullRect.fRight);
         clippedDomain.fTop = SkMaxScalar(domain.fTop, kFullRect.fTop);
         clippedDomain.fBottom = SkMinScalar(domain.fBottom, kFullRect.fBottom);
         GrAssert(clippedDomain.fLeft <= clippedDomain.fRight);
         GrAssert(clippedDomain.fTop <= clippedDomain.fBottom);
 
         AutoEffectUnref effect(SkNEW_ARGS(GrTextureDomainEffect, (texture,
                                                                   matrix,
                                                                   clippedDomain,
                                                                   wrapMode,
-                                                                  bilerp)));
+                                                                  bilerp,
+                                                                  coordsType)));
         return CreateEffectRef(effect);
 
     }
 }
 
 GrTextureDomainEffect::GrTextureDomainEffect(GrTexture* texture,
                                              const SkMatrix& matrix,
                                              const GrRect& domain,
                                              WrapMode wrapMode,
-                                             bool bilerp)
-    : GrSingleTextureEffect(texture, matrix, bilerp)
+                                             bool bilerp,
+                                             CoordsType coordsType)
+    : GrSingleTextureEffect(texture, matrix, bilerp, coordsType)
     , fWrapMode(wrapMode)
     , fTextureDomain(domain) {
 }
 
 GrTextureDomainEffect::~GrTextureDomainEffect() {
 
 }
 
 const GrBackendEffectFactory& GrTextureDomainEffect::getFactory() const {
     return GrTBackendEffectFactory<GrTextureDomainEffect>::getInstance();
 }
 
 bool GrTextureDomainEffect::onIsEqual(const GrEffect& sBase) const {
     const GrTextureDomainEffect& s = CastEffect<GrTextureDomainEffect>(sBase);
-    return this->hasSameTextureParamsAndMatrix(s) && this->fTextureDomain == s.fTextureDomain;
+    return this->hasSameTextureParamsMatrixAndCoordsType(s) &&
+           this->fTextureDomain == s.fTextureDomain;
 }
 
 void GrTextureDomainEffect::getConstantColorComponents(GrColor* color, uint32_t* validFlags) const {
     if (kDecal_WrapMode == fWrapMode) {
         *validFlags = 0;
     } else {
         this->updateConstantColorComponentsForModulation(color, validFlags);
     }
 }
 
 ///////////////////////////////////////////////////////////////////////////////
 
 GR_DEFINE_EFFECT_TEST(GrTextureDomainEffect);
 
 GrEffectRef* GrTextureDomainEffect::TestCreate(SkMWCRandom* random,
                                                GrContext*,
                                                GrTexture* textures[]) {
     int texIdx = random->nextBool() ? GrEffectUnitTest::kSkiaPMTextureIdx :
                                       GrEffectUnitTest::kAlphaTextureIdx;
     GrRect domain;
     domain.fLeft = random->nextUScalar1();
     domain.fRight = random->nextRangeScalar(domain.fLeft, SK_Scalar1);
     domain.fTop = random->nextUScalar1();
     domain.fBottom = random->nextRangeScalar(domain.fTop, SK_Scalar1);
     WrapMode wrapMode = random->nextBool() ? kClamp_WrapMode : kDecal_WrapMode;
     const SkMatrix& matrix = GrEffectUnitTest::TestMatrix(random);
-    return GrTextureDomainEffect::Create(textures[texIdx], matrix, domain, wrapMode);
+    bool bilerp = random->nextBool();
+    CoordsType coords = random->nextBool() ? kLocal_CoordsType : kPosition_CoordsType;
+    return GrTextureDomainEffect::Create(textures[texIdx],
+                                         matrix,
+                                         domain,
+                                         wrapMode,
+                                         bilerp,
+                                         coords);
 }