src/third_party/skia/src/gpu/effects/GrSimpleTextureEffect.cpp

   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 "gl/builders/GrGLProgramBuilder.h"
   9 #include "GrSimpleTextureEffect.h"
  10 #include "gl/GrGLProcessor.h"
  11 #include "gl/GrGLSL.h"
  12 #include "gl/GrGLTexture.h"
  13 #include "GrTBackendProcessorFactory.h"
  14 #include "GrTexture.h"
  15
  16 class GrGLSimpleTextureEffect : public GrGLFragmentProcessor {
  17 public:
  18     GrGLSimpleTextureEffect(const GrBackendProcessorFactory& factory, const GrProcessor&)
  19         : INHERITED (factory) {
  20     }
  21
  22     virtual void emitCode(GrGLProgramBuilder* builder,
  23                           const GrFragmentProcessor& fp,
  24                           const GrProcessorKey& key,
  25                           const char* outputColor,
  26                           const char* inputColor,
  27                           const TransformedCoordsArray& coords,
  28                           const TextureSamplerArray& samplers) SK_OVERRIDE {
  29         GrGLFragmentShaderBuilder* fsBuilder = builder->getFragmentShaderBuilder();
  30         fsBuilder->codeAppendf("\t%s = ", outputColor);
  31         fsBuilder->appendTextureLookupAndModulate(inputColor,
  32                                                   samplers[0],
  33                                                   coords[0].c_str(),
  34                                                   coords[0].getType());
  35         fsBuilder->codeAppend(";\n");
  36     }
  37
  38 private:
  39     typedef GrGLFragmentProcessor INHERITED;
  40 };
  41
  42 ///////////////////////////////////////////////////////////////////////////////
  43
  44 void GrSimpleTextureEffect::getConstantColorComponents(GrColor* color, uint32_t* validFlags) const {
  45     this->updateConstantColorComponentsForModulation(color, validFlags);
  46 }
  47
  48 const GrBackendFragmentProcessorFactory& GrSimpleTextureEffect::getFactory() const {
  49     return GrTBackendFragmentProcessorFactory<GrSimpleTextureEffect>::getInstance();
  50 }
  51
  52 ///////////////////////////////////////////////////////////////////////////////
  53
  54 GR_DEFINE_FRAGMENT_PROCESSOR_TEST(GrSimpleTextureEffect);
  55
  56 GrFragmentProcessor* GrSimpleTextureEffect::TestCreate(SkRandom* random,
  57                                                        GrContext*,
  58                                                        const GrDrawTargetCaps&,
  59                                                        GrTexture* textures[]) {
  60     int texIdx = random->nextBool() ? GrProcessorUnitTest::kSkiaPMTextureIdx :
  61                                       GrProcessorUnitTest::kAlphaTextureIdx;
  62     static const SkShader::TileMode kTileModes[] = {
  63         SkShader::kClamp_TileMode,
  64         SkShader::kRepeat_TileMode,
  65         SkShader::kMirror_TileMode,
  66     };
  67     SkShader::TileMode tileModes[] = {
  68         kTileModes[random->nextULessThan(SK_ARRAY_COUNT(kTileModes))],
  69         kTileModes[random->nextULessThan(SK_ARRAY_COUNT(kTileModes))],
  70     };
  71     GrTextureParams params(tileModes, random->nextBool() ? GrTextureParams::kBilerp_FilterMode :
  72                                                            GrTextureParams::kNone_FilterMode);
  73
  74     static const GrCoordSet kCoordSets[] = {
  75         kLocal_GrCoordSet,
  76         kPosition_GrCoordSet
  77     };
  78     GrCoordSet coordSet = kCoordSets[random->nextULessThan(SK_ARRAY_COUNT(kCoordSets))];
  79
  80     const SkMatrix& matrix = GrProcessorUnitTest::TestMatrix(random);
  81     return GrSimpleTextureEffect::Create(textures[texIdx], matrix, coordSet);
  82 }