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
15class GrGLSimpleTextureEffect : public GrGLEffect {
16public:
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
36private:
37    typedef GrGLEffect INHERITED;
38};
39
40///////////////////////////////////////////////////////////////////////////////
41
42void GrSimpleTextureEffect::getConstantColorComponents(GrColor* color, uint32_t* validFlags) const {
43    this->updateConstantColorComponentsForModulation(color, validFlags);
44}
45
46const GrBackendEffectFactory& GrSimpleTextureEffect::getFactory() const {
47    return GrTBackendEffectFactory<GrSimpleTextureEffect>::getInstance();
48}
49
50///////////////////////////////////////////////////////////////////////////////
51
52GR_DEFINE_EFFECT_TEST(GrSimpleTextureEffect);
53
54GrEffectRef* 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