bool GrDrawTarget::srcAlphaWillBeOne(GrVertexLayout layout) const {
const GrDrawState& drawState = this->getDrawState();
// Check if per-vertex or constant color may have partial alpha
if ((layout & kColor_VertexLayoutBit) ||
0xff != GrColorUnpackA(drawState.getColor())) {
return false;
}
// Check if color filter could introduce an alpha
// (TODO: Consider being more aggressive with regards to detecting 0xff
// final alpha from color filter).
if (SkXfermode::kDst_Mode != drawState.getColorFilterMode()) {
return false;
}
// Check if a color stage could create a partial alpha
for (int s = 0; s < drawState.getFirstCoverageStage(); ++s) {
if (StageWillBeUsed(s, layout, this->getDrawState())) {
GrAssert(NULL != drawState.getTexture(s));
GrPixelConfig config = drawState.getTexture(s)->config();
if (!GrPixelConfigIsOpaque(config)) {
return false;
}
}
}
return true;
}
bool GrDrawTarget::srcAlphaWillBeOne() const {
const GrVertexLayout& layout = this->getGeomSrc().fVertexLayout;
// Check if per-vertex or constant color may have partial alpha
if ((layout & kColor_VertexLayoutBit) ||
0xff != GrColorUnpackA(fCurrDrawState.fColor)) {
return false;
}
// Check if color filter could introduce an alpha
// (TODO: Consider being more aggressive with regards to detecting 0xff
// final alpha from color filter).
if (SkXfermode::kDst_Mode != fCurrDrawState.fColorFilterXfermode) {
return false;
}
// Check if a color stage could create a partial alpha
for (int s = 0; s < fCurrDrawState.fFirstCoverageStage; ++s) {
if (StageWillBeUsed(s, layout, fCurrDrawState)) {
GrAssert(NULL != fCurrDrawState.fTextures[s]);
GrPixelConfig config = fCurrDrawState.fTextures[s]->config();
if (!GrPixelConfigIsOpaque(config)) {
return false;
}
}
}
return true;
}
void GrAlphaThresholdFragmentProcessor::onComputeInvariantOutput(GrInvariantOutput* inout) const {
if (GrPixelConfigIsAlphaOnly(this->texture(0)->config())) {
inout->mulByUnknownSingleComponent();
} else if (GrPixelConfigIsOpaque(this->texture(0)->config()) && fOuterThreshold >= 1.f) {
inout->mulByUnknownOpaqueFourComponents();
} else {
inout->mulByUnknownFourComponents();
}
}
void GrBitmapTextGeoProc::onGetInvariantOutputCoverage(GrInitInvariantOutput* out) const {
if (kARGB_GrMaskFormat != fMaskFormat) {
if (GrPixelConfigIsAlphaOnly(this->texture(0)->config())) {
out->setUnknownSingleComponent();
} else if (GrPixelConfigIsOpaque(this->texture(0)->config())) {
out->setUnknownOpaqueFourComponents();
out->setUsingLCDCoverage();
} else {
out->setUnknownFourComponents();
out->setUsingLCDCoverage();
}
} else {
out->setKnownSingleComponent(0xff);
}
}
bool isOpaque() const override {
return GrPixelConfigIsOpaque(fTexture->config()) || fAlphaType == kOpaque_SkAlphaType;
}
bool SkImage_Gpu::isOpaque() const {
return GrPixelConfigIsOpaque(fTexture->config()) || fAlphaType == kOpaque_SkAlphaType;
}
