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      1 /*
      2  * Copyright 2012 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 "GrSimpleTextureEffect.h"
      9 #include "gl/GrGLEffect.h"
     10 #include "gl/GrGLEffectMatrix.h"
     11 #include "gl/GrGLSL.h"
     12 #include "gl/GrGLTexture.h"
     13 #include "GrTBackendEffectFactory.h"
     14 #include "GrTexture.h"
     15 
     16 class GrGLSimpleTextureEffect : public GrGLEffect {
     17 public:
     18     GrGLSimpleTextureEffect(const GrBackendEffectFactory& factory, const GrEffectRef&)
     19     : INHERITED (factory) {}
     20 
     21     virtual void emitCode(GrGLShaderBuilder* builder,
     22                           const GrEffectStage&,
     23                           EffectKey key,
     24                           const char* vertexCoords,
     25                           const char* outputColor,
     26                           const char* inputColor,
     27                           const TextureSamplerArray& samplers) SK_OVERRIDE {
     28         const char* coordName;
     29         GrSLType coordType = fEffectMatrix.emitCode(builder, key, vertexCoords, &coordName);
     30         builder->fFSCode.appendf("\t%s = ", outputColor);
     31         builder->appendTextureLookupAndModulate(&builder->fFSCode,
     32                                                 inputColor,
     33                                                 samplers[0],
     34                                                 coordName,
     35                                                 coordType);
     36         builder->fFSCode.append(";\n");
     37     }
     38 
     39     static inline EffectKey GenKey(const GrEffectStage& stage, const GrGLCaps&) {
     40         const GrSimpleTextureEffect& ste = GetEffectFromStage<GrSimpleTextureEffect>(stage);
     41         return GrGLEffectMatrix::GenKey(ste.getMatrix(),
     42                                         stage.getCoordChangeMatrix(),
     43                                         ste.texture(0));
     44     }
     45 
     46     virtual void setData(const GrGLUniformManager& uman, const GrEffectStage& stage) SK_OVERRIDE {
     47         const GrSimpleTextureEffect& ste = GetEffectFromStage<GrSimpleTextureEffect>(stage);
     48         fEffectMatrix.setData(uman, ste.getMatrix(), stage.getCoordChangeMatrix(), ste.texture(0));
     49     }
     50 
     51 private:
     52     GrGLEffectMatrix fEffectMatrix;
     53     typedef GrGLEffect INHERITED;
     54 };
     55 
     56 ///////////////////////////////////////////////////////////////////////////////
     57 
     58 void GrSimpleTextureEffect::getConstantColorComponents(GrColor* color, uint32_t* validFlags) const {
     59     this->updateConstantColorComponentsForModulation(color, validFlags);
     60 }
     61 
     62 const GrBackendEffectFactory& GrSimpleTextureEffect::getFactory() const {
     63     return GrTBackendEffectFactory<GrSimpleTextureEffect>::getInstance();
     64 }
     65 
     66 ///////////////////////////////////////////////////////////////////////////////
     67 
     68 GR_DEFINE_EFFECT_TEST(GrSimpleTextureEffect);
     69 
     70 GrEffectRef* GrSimpleTextureEffect::TestCreate(SkRandom* random,
     71                                                GrContext* context,
     72                                                GrTexture* textures[]) {
     73     int texIdx = random->nextBool() ? GrEffectUnitTest::kSkiaPMTextureIdx :
     74                                       GrEffectUnitTest::kAlphaTextureIdx;
     75     const SkMatrix& matrix = GrEffectUnitTest::TestMatrix(random);
     76     return GrSimpleTextureEffect::Create(textures[texIdx], matrix);
     77 }
     78