virtual void emitCode(EmitArgs& args) override {
SkXfermode::Mode mode = args.fFp.cast<ModeColorFilterEffect>().mode();
SkASSERT(SkXfermode::kDst_Mode != mode);
const char* colorFilterColorUniName = nullptr;
if (args.fFp.cast<ModeColorFilterEffect>().willUseFilterColor()) {
fFilterColorUni = args.fBuilder->addUniform(
GrGLProgramBuilder::kFragment_Visibility,
kVec4f_GrSLType, kDefault_GrSLPrecision,
"FilterColor",
&colorFilterColorUniName);
}
GrGLSLExpr4 filter =
color_filter_expression(mode, GrGLSLExpr4(colorFilterColorUniName),
GrGLSLExpr4(args.fInputColor));
args.fBuilder->getFragmentShaderBuilder()->
codeAppendf("\t%s = %s;\n", args.fOutputColor, filter.c_str());
}
void ModeColorFilterEffect::onComputeInvariantOutput(GrInvariantOutput* inout) const {
float inputColor[4];
GrColorToRGBAFloat(inout->color(), inputColor);
float filterColor[4];
GrColorToRGBAFloat(fColor, filterColor);
MaskedColorExpr result =
color_filter_expression(fMode,
MaskedColorExpr(filterColor, kRGBA_GrColorComponentFlags),
MaskedColorExpr(inputColor, inout->validFlags()));
// Check if we will use the input color
SkXfermode::Coeff dstCoeff;
SkXfermode::Coeff srcCoeff;
SkAssertResult(SkXfermode::ModeAsCoeff(fMode, &srcCoeff, &dstCoeff));
GrInvariantOutput::ReadInput readInput = GrInvariantOutput::kWill_ReadInput;
// These could be calculated from the blend equation with template trickery..
if (SkXfermode::kZero_Coeff == dstCoeff &&
!GrBlendCoeffRefsDst(sk_blend_to_grblend(srcCoeff))) {
readInput = GrInvariantOutput::kWillNot_ReadInput;
}
inout->setToOther(result.getValidComponents(), result.getColor(), readInput);
}
virtual void emitCode(GrGLFPBuilder* builder,
const GrFragmentProcessor& fp,
const char* outputColor,
const char* inputColor,
const TransformedCoordsArray&,
const TextureSamplerArray&) override {
SkXfermode::Mode mode = fp.cast<ModeColorFilterEffect>().mode();
SkASSERT(SkXfermode::kDst_Mode != mode);
const char* colorFilterColorUniName = NULL;
if (fp.cast<ModeColorFilterEffect>().willUseFilterColor()) {
fFilterColorUni = builder->addUniform(GrGLProgramBuilder::kFragment_Visibility,
kVec4f_GrSLType, kDefault_GrSLPrecision,
"FilterColor",
&colorFilterColorUniName);
}
GrGLSLExpr4 filter =
color_filter_expression(mode, GrGLSLExpr4(colorFilterColorUniName),
GrGLSLExpr4(inputColor));
builder->getFragmentShaderBuilder()->
codeAppendf("\t%s = %s;\n", outputColor, filter.c_str());
}
