void GrGLCubicEffect::onEmitCode(EmitArgs& args, GrGPArgs* gpArgs) { GrGLVertexBuilder* vsBuilder = args.fPB->getVertexShaderBuilder(); const GrCubicEffect& gp = args.fGP.cast<GrCubicEffect>(); const CubicBatchTracker& local = args.fBT.cast<CubicBatchTracker>(); // emit attributes vsBuilder->emitAttributes(gp); GrGLVertToFrag v(kVec4f_GrSLType); args.fPB->addVarying("CubicCoeffs", &v, kHigh_GrSLPrecision); vsBuilder->codeAppendf("%s = %s;", v.vsOut(), gp.inCubicCoeffs()->fName); // Setup pass through color this->setupColorPassThrough(args.fPB, local.fInputColorType, args.fOutputColor, NULL, &fColorUniform); // Setup position this->setupPosition(args.fPB, gpArgs, gp.inPosition()->fName, gp.viewMatrix()); // emit transforms with position this->emitTransforms(args.fPB, gpArgs->fPositionVar, gp.inPosition()->fName, args.fTransformsIn, args.fTransformsOut); GrGLFragmentBuilder* fsBuilder = args.fPB->getFragmentShaderBuilder(); GrGLShaderVar edgeAlpha("edgeAlpha", kFloat_GrSLType, 0, kHigh_GrSLPrecision); GrGLShaderVar dklmdx("dklmdx", kVec3f_GrSLType, 0, kHigh_GrSLPrecision); GrGLShaderVar dklmdy("dklmdy", kVec3f_GrSLType, 0, kHigh_GrSLPrecision); GrGLShaderVar dfdx("dfdx", kFloat_GrSLType, 0, kHigh_GrSLPrecision); GrGLShaderVar dfdy("dfdy", kFloat_GrSLType, 0, kHigh_GrSLPrecision); GrGLShaderVar gF("gF", kVec2f_GrSLType, 0, kHigh_GrSLPrecision); GrGLShaderVar gFM("gFM", kFloat_GrSLType, 0, kHigh_GrSLPrecision); GrGLShaderVar func("func", kFloat_GrSLType, 0, kHigh_GrSLPrecision); fsBuilder->declAppend(edgeAlpha); fsBuilder->declAppend(dklmdx); fsBuilder->declAppend(dklmdy); fsBuilder->declAppend(dfdx); fsBuilder->declAppend(dfdy); fsBuilder->declAppend(gF); fsBuilder->declAppend(gFM); fsBuilder->declAppend(func); switch (fEdgeType) { case kHairlineAA_GrProcessorEdgeType: { SkAssertResult(fsBuilder->enableFeature( GrGLFragmentShaderBuilder::kStandardDerivatives_GLSLFeature)); fsBuilder->codeAppendf("%s = dFdx(%s.xyz);", dklmdx.c_str(), v.fsIn()); fsBuilder->codeAppendf("%s = dFdy(%s.xyz);", dklmdy.c_str(), v.fsIn()); fsBuilder->codeAppendf("%s = 3.0 * %s.x * %s.x * %s.x - %s.y * %s.z - %s.z * %s.y;", dfdx.c_str(), v.fsIn(), v.fsIn(), dklmdx.c_str(), v.fsIn(), dklmdx.c_str(), v.fsIn(), dklmdx.c_str()); fsBuilder->codeAppendf("%s = 3.0 * %s.x * %s.x * %s.x - %s.y * %s.z - %s.z * %s.y;", dfdy.c_str(), v.fsIn(), v.fsIn(), dklmdy.c_str(), v.fsIn(), dklmdy.c_str(), v.fsIn(), dklmdy.c_str()); fsBuilder->codeAppendf("%s = vec2(%s, %s);", gF.c_str(), dfdx.c_str(), dfdy.c_str()); fsBuilder->codeAppendf("%s = sqrt(dot(%s, %s));", gFM.c_str(), gF.c_str(), gF.c_str()); fsBuilder->codeAppendf("%s = %s.x * %s.x * %s.x - %s.y * %s.z;", func.c_str(), v.fsIn(), v.fsIn(), v.fsIn(), v.fsIn(), v.fsIn()); fsBuilder->codeAppendf("%s = abs(%s);", func.c_str(), func.c_str()); fsBuilder->codeAppendf("%s = %s / %s;", edgeAlpha.c_str(), func.c_str(), gFM.c_str()); fsBuilder->codeAppendf("%s = max(1.0 - %s, 0.0);", edgeAlpha.c_str(), edgeAlpha.c_str()); // Add line below for smooth cubic ramp // fsBuilder->codeAppendf("%s = %s * %s * (3.0 - 2.0 * %s);", // edgeAlpha.c_str(), edgeAlpha.c_str(), edgeAlpha.c_str(), // edgeAlpha.c_str()); break; } case kFillAA_GrProcessorEdgeType: { SkAssertResult(fsBuilder->enableFeature( GrGLFragmentShaderBuilder::kStandardDerivatives_GLSLFeature)); fsBuilder->codeAppendf("%s = dFdx(%s.xyz);", dklmdx.c_str(), v.fsIn()); fsBuilder->codeAppendf("%s = dFdy(%s.xyz);", dklmdy.c_str(), v.fsIn()); fsBuilder->codeAppendf("%s =" "3.0 * %s.x * %s.x * %s.x - %s.y * %s.z - %s.z * %s.y;", dfdx.c_str(), v.fsIn(), v.fsIn(), dklmdx.c_str(), v.fsIn(), dklmdx.c_str(), v.fsIn(), dklmdx.c_str()); fsBuilder->codeAppendf("%s = 3.0 * %s.x * %s.x * %s.x - %s.y * %s.z - %s.z * %s.y;", dfdy.c_str(), v.fsIn(), v.fsIn(), dklmdy.c_str(), v.fsIn(), dklmdy.c_str(), v.fsIn(), dklmdy.c_str()); fsBuilder->codeAppendf("%s = vec2(%s, %s);", gF.c_str(), dfdx.c_str(), dfdy.c_str()); fsBuilder->codeAppendf("%s = sqrt(dot(%s, %s));", gFM.c_str(), gF.c_str(), gF.c_str()); fsBuilder->codeAppendf("%s = %s.x * %s.x * %s.x - %s.y * %s.z;", func.c_str(), v.fsIn(), v.fsIn(), v.fsIn(), v.fsIn(), v.fsIn()); fsBuilder->codeAppendf("%s = %s / %s;", edgeAlpha.c_str(), func.c_str(), gFM.c_str()); fsBuilder->codeAppendf("%s = clamp(1.0 - %s, 0.0, 1.0);", edgeAlpha.c_str(), edgeAlpha.c_str()); // Add line below for smooth cubic ramp // fsBuilder->codeAppendf("%s = %s * %s * (3.0 - 2.0 * %s);", // edgeAlpha.c_str(), edgeAlpha.c_str(), edgeAlpha.c_str(), // edgeAlpha.c_str()); break; } case kFillBW_GrProcessorEdgeType: { fsBuilder->codeAppendf("%s = %s.x * %s.x * %s.x - %s.y * %s.z;", edgeAlpha.c_str(), v.fsIn(), v.fsIn(), v.fsIn(), v.fsIn(), v.fsIn()); fsBuilder->codeAppendf("%s = float(%s < 0.0);", edgeAlpha.c_str(), edgeAlpha.c_str()); break; } default: SkFAIL("Shouldn't get here"); } fsBuilder->codeAppendf("%s = vec4(%s);", args.fOutputCoverage, edgeAlpha.c_str()); }