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1 /* | |
2 * Copyright 2012 Google Inc. | |
bsalomon
2013/09/23 14:13:48
2013
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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 "GrCustomCoordsTextureEffect.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 GrGLCustomCoordsTextureEffect : public GrGLEffect { | |
17 public: | |
18 GrGLCustomCoordsTextureEffect(const GrBackendEffectFactory& factory, const G rDrawEffect& drawEffect) | |
19 : INHERITED (factory) {} | |
20 | |
21 virtual void emitCode(GrGLShaderBuilder* builder, | |
22 const GrDrawEffect& drawEffect, | |
23 EffectKey key, | |
24 const char* outputColor, | |
25 const char* inputColor, | |
26 const TextureSamplerArray& samplers) SK_OVERRIDE { | |
27 const GrCustomCoordsTextureEffect& cte = drawEffect.castEffect<GrCustomC oordsTextureEffect>(); | |
28 GrGLShaderBuilder::VertexBuilder* vertexBuilder = builder->getVertexBuil der(); | |
29 SkASSERT(NULL != vertexBuilder); | |
30 SkASSERT(1 == cte.numVertexAttribs()); | |
31 | |
32 SkString fsCoordName; | |
33 const char* vsVaryingName; | |
34 const char* fsVaryingNamePtr; | |
35 vertexBuilder->addVarying(kVec2f_GrSLType, "textureCoords", &vsVaryingNa me, &fsVaryingNamePtr); | |
36 fsCoordName = fsVaryingNamePtr; | |
37 | |
38 const char* attrName = | |
39 vertexBuilder->getEffectAttributeName(drawEffect.getVertexAttribIndi ces()[0])->c_str(); | |
40 vertexBuilder->vsCodeAppendf("\t%s = %s;\n", vsVaryingName, attrName); | |
41 | |
42 builder->fsCodeAppendf("\t%s = ", outputColor); | |
43 builder->fsAppendTextureLookupAndModulate(inputColor, | |
44 samplers[0], | |
45 fsCoordName.c_str(), | |
46 kVec2f_GrSLType); | |
47 builder->fsCodeAppend(";\n"); | |
48 } | |
49 | |
50 static inline EffectKey GenKey(const GrDrawEffect& drawEffect, const GrGLCap s&) { | |
51 return 1 << GrGLEffectMatrix::kKeyBits; | |
52 } | |
53 | |
54 virtual void setData(const GrGLUniformManager& uman, | |
55 const GrDrawEffect& drawEffect) SK_OVERRIDE {} | |
56 | |
57 private: | |
58 typedef GrGLEffect INHERITED; | |
59 }; | |
60 | |
61 /////////////////////////////////////////////////////////////////////////////// | |
62 | |
63 GrCustomCoordsTextureEffect::GrCustomCoordsTextureEffect(GrTexture* texture, | |
64 const GrTextureParams& params) | |
65 : fTextureAccess(texture, params) { | |
66 this->addTextureAccess(&fTextureAccess); | |
67 this->addVertexAttrib(kVec2f_GrSLType); | |
68 } | |
69 | |
70 bool GrCustomCoordsTextureEffect::onIsEqual(const GrEffect& other) const { | |
71 const GrCustomCoordsTextureEffect& cte = CastEffect<GrCustomCoordsTextureEff ect>(other); | |
72 return fTextureAccess == cte.fTextureAccess; | |
73 } | |
74 | |
75 void GrCustomCoordsTextureEffect::getConstantColorComponents(GrColor* color, | |
76 uint32_t* validFlag s) const { | |
77 if ((*validFlags & kA_GrColorComponentFlag) && 0xFF == GrColorUnpackA(*color ) && | |
78 GrPixelConfigIsOpaque(this->texture(0)->config())) { | |
79 *validFlags = kA_GrColorComponentFlag; | |
80 } else { | |
81 *validFlags = 0; | |
82 } | |
83 } | |
84 | |
85 const GrBackendEffectFactory& GrCustomCoordsTextureEffect::getFactory() const { | |
86 return GrTBackendEffectFactory<GrCustomCoordsTextureEffect>::getInstance(); | |
87 } | |
88 | |
89 /////////////////////////////////////////////////////////////////////////////// | |
90 | |
91 GR_DEFINE_EFFECT_TEST(GrCustomCoordsTextureEffect); | |
92 | |
93 GrEffectRef* GrCustomCoordsTextureEffect::TestCreate(SkRandom* random, | |
94 GrContext*, | |
bsalomon
2013/09/23 14:13:48
can you align the wrapped params with "SkRandom ra
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95 const GrDrawTargetCaps&, | |
96 GrTexture* textures[]) { | |
97 int texIdx = random->nextBool() ? GrEffectUnitTest::kSkiaPMTextureIdx : | |
98 GrEffectUnitTest::kAlphaTextureIdx; | |
99 static const SkShader::TileMode kTileModes[] = { | |
100 SkShader::kClamp_TileMode, | |
101 SkShader::kRepeat_TileMode, | |
102 SkShader::kMirror_TileMode, | |
103 }; | |
104 SkShader::TileMode tileModes[] = { | |
105 kTileModes[random->nextULessThan(SK_ARRAY_COUNT(kTileModes))], | |
106 kTileModes[random->nextULessThan(SK_ARRAY_COUNT(kTileModes))], | |
107 }; | |
108 GrTextureParams params(tileModes, random->nextBool() ? GrTextureParams::kBil erp_FilterMode : | |
109 GrTextureParams::kNon e_FilterMode); | |
110 | |
111 return GrCustomCoordsTextureEffect::Create(textures[texIdx], params); | |
112 } | |
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