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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/GrGLSL.h"
     11 #include "gl/GrGLTexture.h"
     12 #include "GrTBackendEffectFactory.h"
     13 #include "GrTexture.h"
     14 
     15 class GrGLSimpleTextureEffect : public GrGLEffect {
     16 public:
     17     GrGLSimpleTextureEffect(const GrBackendEffectFactory& factory, const GrDrawEffect&)
     18         : INHERITED (factory) {
     19     }
     20 
     21     virtual void emitCode(GrGLShaderBuilder* builder,
     22                           const GrDrawEffect& drawEffect,
     23                           EffectKey key,
     24                           const char* outputColor,
     25                           const char* inputColor,
     26                           const TransformedCoordsArray& coords,
     27                           const TextureSamplerArray& samplers) SK_OVERRIDE {
     28         builder->fsCodeAppendf("\t%s = ", outputColor);
     29         builder->fsAppendTextureLookupAndModulate(inputColor,
     30                                                   samplers[0],
     31                                                   coords[0].c_str(),
     32                                                   coords[0].type());
     33         builder->fsCodeAppend(";\n");
     34     }
     35 
     36 private:
     37     typedef GrGLEffect INHERITED;
     38 };
     39 
     40 ///////////////////////////////////////////////////////////////////////////////
     41 
     42 void GrSimpleTextureEffect::getConstantColorComponents(GrColor* color, uint32_t* validFlags) const {
     43     this->updateConstantColorComponentsForModulation(color, validFlags);
     44 }
     45 
     46 const GrBackendEffectFactory& GrSimpleTextureEffect::getFactory() const {
     47     return GrTBackendEffectFactory<GrSimpleTextureEffect>::getInstance();
     48 }
     49 
     50 ///////////////////////////////////////////////////////////////////////////////
     51 
     52 GR_DEFINE_EFFECT_TEST(GrSimpleTextureEffect);
     53 
     54 GrEffectRef* GrSimpleTextureEffect::TestCreate(SkRandom* random,
     55                                                GrContext*,
     56                                                const GrDrawTargetCaps&,
     57                                                GrTexture* textures[]) {
     58     int texIdx = random->nextBool() ? GrEffectUnitTest::kSkiaPMTextureIdx :
     59                                       GrEffectUnitTest::kAlphaTextureIdx;
     60     static const SkShader::TileMode kTileModes[] = {
     61         SkShader::kClamp_TileMode,
     62         SkShader::kRepeat_TileMode,
     63         SkShader::kMirror_TileMode,
     64     };
     65     SkShader::TileMode tileModes[] = {
     66         kTileModes[random->nextULessThan(SK_ARRAY_COUNT(kTileModes))],
     67         kTileModes[random->nextULessThan(SK_ARRAY_COUNT(kTileModes))],
     68     };
     69     GrTextureParams params(tileModes, random->nextBool() ? GrTextureParams::kBilerp_FilterMode :
     70                                                            GrTextureParams::kNone_FilterMode);
     71 
     72     static const GrCoordSet kCoordSets[] = {
     73         kLocal_GrCoordSet,
     74         kPosition_GrCoordSet
     75     };
     76     GrCoordSet coordSet = kCoordSets[random->nextULessThan(SK_ARRAY_COUNT(kCoordSets))];
     77 
     78     const SkMatrix& matrix = GrEffectUnitTest::TestMatrix(random);
     79     return GrSimpleTextureEffect::Create(textures[texIdx], matrix, coordSet);
     80 }
     81