1 /*
2 * Copyright 2013 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 "GrCustomCoordsTextureEffect.h"
9 #include "gl/builders/GrGLFullProgramBuilder.h"
10 #include "gl/GrGLProcessor.h"
11 #include "gl/GrGLSL.h"
12 #include "gl/GrGLTexture.h"
13 #include "gl/GrGLGeometryProcessor.h"
14 #include "GrTBackendProcessorFactory.h"
15 #include "GrTexture.h"
16
17 class GrGLCustomCoordsTextureEffect : public GrGLGeometryProcessor {
18 public:
GrGLCustomCoordsTextureEffect(const GrBackendProcessorFactory & factory,const GrProcessor &)19 GrGLCustomCoordsTextureEffect(const GrBackendProcessorFactory& factory, const GrProcessor&)
20 : INHERITED (factory) {}
21
emitCode(GrGLFullProgramBuilder * builder,const GrGeometryProcessor & geometryProcessor,const GrProcessorKey & key,const char * outputColor,const char * inputColor,const TransformedCoordsArray &,const TextureSamplerArray & samplers)22 virtual void emitCode(GrGLFullProgramBuilder* builder,
23 const GrGeometryProcessor& geometryProcessor,
24 const GrProcessorKey& key,
25 const char* outputColor,
26 const char* inputColor,
27 const TransformedCoordsArray&,
28 const TextureSamplerArray& samplers) SK_OVERRIDE {
29 const GrCustomCoordsTextureEffect& customCoordsTextureEffect =
30 geometryProcessor.cast<GrCustomCoordsTextureEffect>();
31 SkASSERT(1 == customCoordsTextureEffect.getVertexAttribs().count());
32
33 SkString fsCoordName;
34 const char* vsVaryingName;
35 const char* fsVaryingNamePtr;
36 builder->addVarying(kVec2f_GrSLType, "textureCoords", &vsVaryingName, &fsVaryingNamePtr);
37 fsCoordName = fsVaryingNamePtr;
38
39 GrGLVertexShaderBuilder* vsBuilder = builder->getVertexShaderBuilder();
40 const GrShaderVar& inTextureCoords = customCoordsTextureEffect.inTextureCoords();
41 vsBuilder->codeAppendf("\t%s = %s;\n", vsVaryingName, inTextureCoords.c_str());
42
43 GrGLProcessorFragmentShaderBuilder* fsBuilder = builder->getFragmentShaderBuilder();
44 fsBuilder->codeAppendf("\t%s = ", outputColor);
45 fsBuilder->appendTextureLookupAndModulate(inputColor,
46 samplers[0],
47 fsCoordName.c_str(),
48 kVec2f_GrSLType);
49 fsBuilder->codeAppend(";\n");
50 }
51
setData(const GrGLProgramDataManager &,const GrProcessor &)52 virtual void setData(const GrGLProgramDataManager&,
53 const GrProcessor&) SK_OVERRIDE {}
54
55 private:
56 typedef GrGLGeometryProcessor INHERITED;
57 };
58
59 ///////////////////////////////////////////////////////////////////////////////
60
GrCustomCoordsTextureEffect(GrTexture * texture,const GrTextureParams & params)61 GrCustomCoordsTextureEffect::GrCustomCoordsTextureEffect(GrTexture* texture,
62 const GrTextureParams& params)
63 : fTextureAccess(texture, params)
64 , fInTextureCoords(this->addVertexAttrib(GrShaderVar("inTextureCoords",
65 kVec2f_GrSLType,
66 GrShaderVar::kAttribute_TypeModifier))) {
67 this->addTextureAccess(&fTextureAccess);
68 }
69
onIsEqual(const GrProcessor & other) const70 bool GrCustomCoordsTextureEffect::onIsEqual(const GrProcessor& other) const {
71 const GrCustomCoordsTextureEffect& cte = other.cast<GrCustomCoordsTextureEffect>();
72 return fTextureAccess == cte.fTextureAccess;
73 }
74
getConstantColorComponents(GrColor * color,uint32_t * validFlags) const75 void GrCustomCoordsTextureEffect::getConstantColorComponents(GrColor* color,
76 uint32_t* validFlags) 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
getFactory() const85 const GrBackendGeometryProcessorFactory& GrCustomCoordsTextureEffect::getFactory() const {
86 return GrTBackendGeometryProcessorFactory<GrCustomCoordsTextureEffect>::getInstance();
87 }
88
89 ///////////////////////////////////////////////////////////////////////////////
90
91 GR_DEFINE_GEOMETRY_PROCESSOR_TEST(GrCustomCoordsTextureEffect);
92
TestCreate(SkRandom * random,GrContext *,const GrDrawTargetCaps &,GrTexture * textures[])93 GrGeometryProcessor* GrCustomCoordsTextureEffect::TestCreate(SkRandom* random,
94 GrContext*,
95 const GrDrawTargetCaps&,
96 GrTexture* textures[]) {
97 int texIdx = random->nextBool() ? GrProcessorUnitTest::kSkiaPMTextureIdx :
98 GrProcessorUnitTest::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::kBilerp_FilterMode :
109 GrTextureParams::kNone_FilterMode);
110
111 return GrCustomCoordsTextureEffect::Create(textures[texIdx], params);
112 }
113