| /* |
| * Copyright 2014 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #include "GrSwizzle.h" |
| #include "glsl/GrGLSLShaderBuilder.h" |
| #include "glsl/GrGLSLCaps.h" |
| #include "glsl/GrGLSLShaderVar.h" |
| #include "glsl/GrGLSLSampler.h" |
| #include "glsl/GrGLSLProgramBuilder.h" |
| |
| GrGLSLShaderBuilder::GrGLSLShaderBuilder(GrGLSLProgramBuilder* program) |
| : fProgramBuilder(program) |
| , fInputs(GrGLSLProgramBuilder::kVarsPerBlock) |
| , fOutputs(GrGLSLProgramBuilder::kVarsPerBlock) |
| , fFeaturesAddedMask(0) |
| , fCodeIndex(kCode) |
| , fFinalized(false) { |
| // We push back some dummy pointers which will later become our header |
| for (int i = 0; i <= kCode; i++) { |
| fShaderStrings.push_back(); |
| fCompilerStrings.push_back(nullptr); |
| fCompilerStringLengths.push_back(0); |
| } |
| |
| this->main() = "void main() {"; |
| } |
| |
| void GrGLSLShaderBuilder::declAppend(const GrGLSLShaderVar& var) { |
| SkString tempDecl; |
| var.appendDecl(fProgramBuilder->glslCaps(), &tempDecl); |
| this->codeAppendf("%s;", tempDecl.c_str()); |
| } |
| |
| void GrGLSLShaderBuilder::appendPrecisionModifier(GrSLPrecision precision) { |
| if (fProgramBuilder->glslCaps()->usesPrecisionModifiers()) { |
| this->codeAppendf("%s ", GrGLSLPrecisionString(precision)); |
| } |
| } |
| |
| void GrGLSLShaderBuilder::emitFunction(GrSLType returnType, |
| const char* name, |
| int argCnt, |
| const GrGLSLShaderVar* args, |
| const char* body, |
| SkString* outName) { |
| this->functions().append(GrGLSLTypeString(returnType)); |
| fProgramBuilder->nameVariable(outName, '\0', name); |
| this->functions().appendf(" %s", outName->c_str()); |
| this->functions().append("("); |
| for (int i = 0; i < argCnt; ++i) { |
| args[i].appendDecl(fProgramBuilder->glslCaps(), &this->functions()); |
| if (i < argCnt - 1) { |
| this->functions().append(", "); |
| } |
| } |
| this->functions().append(") {\n"); |
| this->functions().append(body); |
| this->functions().append("}\n\n"); |
| } |
| |
| void GrGLSLShaderBuilder::appendTextureLookup(SkString* out, |
| SamplerHandle samplerHandle, |
| const char* coordName, |
| GrSLType varyingType) const { |
| const GrGLSLCaps* glslCaps = fProgramBuilder->glslCaps(); |
| const GrGLSLSampler& sampler = fProgramBuilder->getSampler(samplerHandle); |
| GrSLType samplerType = sampler.type(); |
| if (samplerType == kSampler2DRect_GrSLType) { |
| if (varyingType == kVec2f_GrSLType) { |
| out->appendf("%s(%s, textureSize(%s) * %s)", |
| GrGLSLTexture2DFunctionName(varyingType, samplerType, |
| glslCaps->generation()), |
| sampler.getSamplerNameForTexture2D(), |
| sampler.getSamplerNameForTexture2D(), |
| coordName); |
| } else { |
| out->appendf("%s(%s, vec3(textureSize(%s) * %s.xy, %s.z))", |
| GrGLSLTexture2DFunctionName(varyingType, samplerType, |
| glslCaps->generation()), |
| sampler.getSamplerNameForTexture2D(), |
| sampler.getSamplerNameForTexture2D(), |
| coordName, |
| coordName); |
| } |
| } else { |
| out->appendf("%s(%s, %s)", |
| GrGLSLTexture2DFunctionName(varyingType, samplerType, glslCaps->generation()), |
| sampler.getSamplerNameForTexture2D(), |
| coordName); |
| } |
| |
| this->appendTextureSwizzle(out, sampler.config()); |
| } |
| |
| void GrGLSLShaderBuilder::appendTextureLookup(SamplerHandle samplerHandle, |
| const char* coordName, |
| GrSLType varyingType) { |
| this->appendTextureLookup(&this->code(), samplerHandle, coordName, varyingType); |
| } |
| |
| void GrGLSLShaderBuilder::appendTextureLookupAndModulate(const char* modulation, |
| SamplerHandle samplerHandle, |
| const char* coordName, |
| GrSLType varyingType) { |
| SkString lookup; |
| this->appendTextureLookup(&lookup, samplerHandle, coordName, varyingType); |
| this->codeAppend((GrGLSLExpr4(modulation) * GrGLSLExpr4(lookup)).c_str()); |
| } |
| |
| void GrGLSLShaderBuilder::appendTexelFetch(SkString* out, |
| SamplerHandle samplerHandle, |
| const char* coordExpr) const { |
| const GrGLSLSampler& sampler = fProgramBuilder->getSampler(samplerHandle); |
| SkASSERT(fProgramBuilder->glslCaps()->texelFetchSupport()); |
| SkASSERT(GrSLTypeIsSamplerType(sampler.type())); |
| |
| out->appendf("texelFetch(%s, %s)", sampler.getSamplerNameForTexelFetch(), coordExpr); |
| |
| this->appendTextureSwizzle(out, sampler.config()); |
| } |
| |
| void GrGLSLShaderBuilder::appendTexelFetch(SamplerHandle samplerHandle, const char* coordExpr) { |
| this->appendTexelFetch(&this->code(), samplerHandle, coordExpr); |
| } |
| |
| void GrGLSLShaderBuilder::appendTextureSwizzle(SkString* out, GrPixelConfig config) const { |
| const GrSwizzle& configSwizzle = fProgramBuilder->glslCaps()->configTextureSwizzle(config); |
| |
| if (configSwizzle != GrSwizzle::RGBA()) { |
| out->appendf(".%s", configSwizzle.c_str()); |
| } |
| } |
| |
| bool GrGLSLShaderBuilder::addFeature(uint32_t featureBit, const char* extensionName) { |
| if (featureBit & fFeaturesAddedMask) { |
| return false; |
| } |
| this->extensions().appendf("#extension %s: require\n", extensionName); |
| fFeaturesAddedMask |= featureBit; |
| return true; |
| } |
| |
| void GrGLSLShaderBuilder::appendDecls(const VarArray& vars, SkString* out) const { |
| for (int i = 0; i < vars.count(); ++i) { |
| vars[i].appendDecl(fProgramBuilder->glslCaps(), out); |
| out->append(";\n"); |
| } |
| } |
| |
| void GrGLSLShaderBuilder::addLayoutQualifier(const char* param, InterfaceQualifier interface) { |
| SkASSERT(fProgramBuilder->glslCaps()->generation() >= k330_GrGLSLGeneration || |
| fProgramBuilder->glslCaps()->mustEnableAdvBlendEqs()); |
| fLayoutParams[interface].push_back() = param; |
| } |
| |
| void GrGLSLShaderBuilder::compileAndAppendLayoutQualifiers() { |
| static const char* interfaceQualifierNames[] = { |
| "out" |
| }; |
| |
| for (int interface = 0; interface <= kLastInterfaceQualifier; ++interface) { |
| const SkTArray<SkString>& params = fLayoutParams[interface]; |
| if (params.empty()) { |
| continue; |
| } |
| this->layoutQualifiers().appendf("layout(%s", params[0].c_str()); |
| for (int i = 1; i < params.count(); ++i) { |
| this->layoutQualifiers().appendf(", %s", params[i].c_str()); |
| } |
| this->layoutQualifiers().appendf(") %s;\n", interfaceQualifierNames[interface]); |
| } |
| |
| GR_STATIC_ASSERT(0 == GrGLSLShaderBuilder::kOut_InterfaceQualifier); |
| GR_STATIC_ASSERT(SK_ARRAY_COUNT(interfaceQualifierNames) == kLastInterfaceQualifier + 1); |
| } |
| |
| void GrGLSLShaderBuilder::finalize(uint32_t visibility) { |
| SkASSERT(!fFinalized); |
| this->versionDecl() = fProgramBuilder->glslCaps()->versionDeclString(); |
| this->compileAndAppendLayoutQualifiers(); |
| SkASSERT(visibility); |
| fProgramBuilder->appendUniformDecls((GrShaderFlags) visibility, &this->uniforms()); |
| this->appendDecls(fInputs, &this->inputs()); |
| this->appendDecls(fOutputs, &this->outputs()); |
| this->onFinalize(); |
| // append the 'footer' to code |
| this->code().append("}"); |
| |
| for (int i = 0; i <= fCodeIndex; i++) { |
| fCompilerStrings[i] = fShaderStrings[i].c_str(); |
| fCompilerStringLengths[i] = (int)fShaderStrings[i].size(); |
| } |
| |
| fFinalized = true; |
| } |