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 "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 }