GrXferProcessor* PDLCDXferProcessor::Create(SkXfermode::Mode xfermode,
const GrProcOptInfo& colorPOI) {
if (SkXfermode::kSrcOver_Mode != xfermode) {
return NULL;
}
if (kRGBA_GrColorComponentFlags != colorPOI.validFlags()) {
return NULL;
}
GrColor blendConstant = GrUnPreMulColor(colorPOI.color());
uint8_t alpha = GrColorUnpackA(blendConstant);
blendConstant |= (0xff << GrColor_SHIFT_A);
return SkNEW_ARGS(PDLCDXferProcessor, (blendConstant, alpha));
}
GrXferProcessor*
GrPorterDuffXPFactory::onCreateXferProcessor(const GrDrawTargetCaps& caps,
const GrProcOptInfo& colorPOI,
const GrProcOptInfo& covPOI,
const GrDeviceCoordTexture* dstCopy) const {
if (!covPOI.isFourChannelOutput()) {
return PorterDuffXferProcessor::Create(fSrcCoeff, fDstCoeff, 0, dstCopy,
this->willReadDstColor(caps, colorPOI, covPOI));
} else {
if (this->supportsRGBCoverage(colorPOI.color(), colorPOI.validFlags())) {
SkASSERT(kRGBA_GrColorComponentFlags == colorPOI.validFlags());
GrColor blendConstant = GrUnPreMulColor(colorPOI.color());
return PorterDuffXferProcessor::Create(kConstC_GrBlendCoeff, kISC_GrBlendCoeff,
blendConstant, dstCopy,
this->willReadDstColor(caps, colorPOI, covPOI));
} else {
return NULL;
}
}
}