Exemple #1
0
void GrPorterDuffXPFactory::getInvariantBlendedColor(const GrProcOptInfo& colorPOI,
                                                     InvariantBlendedColor* blendedColor) const {
    // Find the blended color info based on the formula that does not have coverage.
    BlendFormula colorFormula = gBlendTable[colorPOI.isOpaque()][0][fXfermode];
    if (colorFormula.usesDstColor()) {
        blendedColor->fWillBlendWithDst = true;
        blendedColor->fKnownColorFlags = kNone_GrColorComponentFlags;
        return;
    }

    blendedColor->fWillBlendWithDst = false;

    SkASSERT(kAdd_GrBlendEquation == colorFormula.fBlendEquation);

    switch (colorFormula.fSrcCoeff) {
        case kZero_GrBlendCoeff:
            blendedColor->fKnownColor = 0;
            blendedColor->fKnownColorFlags = kRGBA_GrColorComponentFlags;
            return;

        case kOne_GrBlendCoeff:
            blendedColor->fKnownColor = colorPOI.color();
            blendedColor->fKnownColorFlags = colorPOI.validFlags();
            return;

        default:
            blendedColor->fKnownColorFlags = kNone_GrColorComponentFlags;
            return;
    }
}