| /* |
| * Copyright 2013 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #include "GrCustomCoordsTextureEffect.h" |
| #include "gl/builders/GrGLFullProgramBuilder.h" |
| #include "gl/GrGLProcessor.h" |
| #include "gl/GrGLSL.h" |
| #include "gl/GrGLTexture.h" |
| #include "gl/GrGLGeometryProcessor.h" |
| #include "GrTBackendProcessorFactory.h" |
| #include "GrTexture.h" |
| |
| class GrGLCustomCoordsTextureEffect : public GrGLGeometryProcessor { |
| public: |
| GrGLCustomCoordsTextureEffect(const GrBackendProcessorFactory& factory, const GrProcessor&) |
| : INHERITED (factory) {} |
| |
| virtual void emitCode(GrGLFullProgramBuilder* builder, |
| const GrGeometryProcessor& geometryProcessor, |
| const GrProcessorKey& key, |
| const char* outputColor, |
| const char* inputColor, |
| const TransformedCoordsArray&, |
| const TextureSamplerArray& samplers) SK_OVERRIDE { |
| const GrCustomCoordsTextureEffect& customCoordsTextureEffect = |
| geometryProcessor.cast<GrCustomCoordsTextureEffect>(); |
| SkASSERT(1 == customCoordsTextureEffect.getVertexAttribs().count()); |
| |
| SkString fsCoordName; |
| const char* vsVaryingName; |
| const char* fsVaryingNamePtr; |
| builder->addVarying(kVec2f_GrSLType, "textureCoords", &vsVaryingName, &fsVaryingNamePtr); |
| fsCoordName = fsVaryingNamePtr; |
| |
| GrGLVertexShaderBuilder* vsBuilder = builder->getVertexShaderBuilder(); |
| const GrShaderVar& inTextureCoords = customCoordsTextureEffect.inTextureCoords(); |
| vsBuilder->codeAppendf("\t%s = %s;\n", vsVaryingName, inTextureCoords.c_str()); |
| |
| GrGLProcessorFragmentShaderBuilder* fsBuilder = builder->getFragmentShaderBuilder(); |
| fsBuilder->codeAppendf("\t%s = ", outputColor); |
| fsBuilder->appendTextureLookupAndModulate(inputColor, |
| samplers[0], |
| fsCoordName.c_str(), |
| kVec2f_GrSLType); |
| fsBuilder->codeAppend(";\n"); |
| } |
| |
| virtual void setData(const GrGLProgramDataManager&, |
| const GrProcessor&) SK_OVERRIDE {} |
| |
| private: |
| typedef GrGLGeometryProcessor INHERITED; |
| }; |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| GrCustomCoordsTextureEffect::GrCustomCoordsTextureEffect(GrTexture* texture, |
| const GrTextureParams& params) |
| : fTextureAccess(texture, params) |
| , fInTextureCoords(this->addVertexAttrib(GrShaderVar("inTextureCoords", |
| kVec2f_GrSLType, |
| GrShaderVar::kAttribute_TypeModifier))) { |
| this->addTextureAccess(&fTextureAccess); |
| } |
| |
| bool GrCustomCoordsTextureEffect::onIsEqual(const GrProcessor& other) const { |
| const GrCustomCoordsTextureEffect& cte = other.cast<GrCustomCoordsTextureEffect>(); |
| return fTextureAccess == cte.fTextureAccess; |
| } |
| |
| void GrCustomCoordsTextureEffect::getConstantColorComponents(GrColor* color, |
| uint32_t* validFlags) const { |
| if ((*validFlags & kA_GrColorComponentFlag) && 0xFF == GrColorUnpackA(*color) && |
| GrPixelConfigIsOpaque(this->texture(0)->config())) { |
| *validFlags = kA_GrColorComponentFlag; |
| } else { |
| *validFlags = 0; |
| } |
| } |
| |
| const GrBackendGeometryProcessorFactory& GrCustomCoordsTextureEffect::getFactory() const { |
| return GrTBackendGeometryProcessorFactory<GrCustomCoordsTextureEffect>::getInstance(); |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| GR_DEFINE_GEOMETRY_PROCESSOR_TEST(GrCustomCoordsTextureEffect); |
| |
| GrGeometryProcessor* GrCustomCoordsTextureEffect::TestCreate(SkRandom* random, |
| GrContext*, |
| const GrDrawTargetCaps&, |
| GrTexture* textures[]) { |
| int texIdx = random->nextBool() ? GrProcessorUnitTest::kSkiaPMTextureIdx : |
| GrProcessorUnitTest::kAlphaTextureIdx; |
| static const SkShader::TileMode kTileModes[] = { |
| SkShader::kClamp_TileMode, |
| SkShader::kRepeat_TileMode, |
| SkShader::kMirror_TileMode, |
| }; |
| SkShader::TileMode tileModes[] = { |
| kTileModes[random->nextULessThan(SK_ARRAY_COUNT(kTileModes))], |
| kTileModes[random->nextULessThan(SK_ARRAY_COUNT(kTileModes))], |
| }; |
| GrTextureParams params(tileModes, random->nextBool() ? GrTextureParams::kBilerp_FilterMode : |
| GrTextureParams::kNone_FilterMode); |
| |
| return GrCustomCoordsTextureEffect::Create(textures[texIdx], params); |
| } |