#define COVERAGE_DST_COEFF_ZERO_FORMULA(SRC_COEFF) \
INIT_BLEND_FORMULA(BlendFormula::kModulate_OutputType, \
BlendFormula::kCoverage_OutputType, \
kAdd_GrBlendEquation, SRC_COEFF, kIS2A_GrBlendCoeff)
/**
* This table outlines the blend formulas we will use with each xfermode, with and without coverage,
* with and without an opaque input color. Optimization properties are deduced at compile time so we
* can make runtime decisions quickly. RGB coverage is not supported.
*/
static const BlendFormula gBlendTable[2][2][SkXfermode::kLastCoeffMode + 1] = {
/*>> No coverage, input color unknown <<*/ {{
/* clear */ DST_CLEAR_FORMULA,
/* src */ COEFF_FORMULA( kOne_GrBlendCoeff, kZero_GrBlendCoeff),
/* dst */ NO_DST_WRITE_FORMULA,
/* src-over */ COEFF_FORMULA( kOne_GrBlendCoeff, kISA_GrBlendCoeff),
/* dst-over */ COEFF_FORMULA( kIDA_GrBlendCoeff, kOne_GrBlendCoeff),
/* src-in */ COEFF_FORMULA( kDA_GrBlendCoeff, kZero_GrBlendCoeff),
/* dst-in */ COEFF_FORMULA( kZero_GrBlendCoeff, kSA_GrBlendCoeff),
/* src-out */ COEFF_FORMULA( kIDA_GrBlendCoeff, kZero_GrBlendCoeff),
/* dst-out */ COEFF_FORMULA( kZero_GrBlendCoeff, kISA_GrBlendCoeff),
/* src-atop */ COEFF_FORMULA( kDA_GrBlendCoeff, kISA_GrBlendCoeff),
/* dst-atop */ COEFF_FORMULA( kIDA_GrBlendCoeff, kSA_GrBlendCoeff),
/* xor */ COEFF_FORMULA( kIDA_GrBlendCoeff, kISA_GrBlendCoeff),
/* plus */ COEFF_FORMULA( kOne_GrBlendCoeff, kOne_GrBlendCoeff),
/* modulate */ COEFF_FORMULA( kZero_GrBlendCoeff, kSC_GrBlendCoeff),
/* screen */ COEFF_FORMULA( kOne_GrBlendCoeff, kISC_GrBlendCoeff),
}, /*>> Has coverage, input color unknown <<*/ {
////////////////////////////////////////////////////////////////////////////////////////////////
// SrcOver Global functions
////////////////////////////////////////////////////////////////////////////////////////////////
const GrXferProcessor& GrPorterDuffXPFactory::SimpleSrcOverXP() {
static BlendFormula gSrcOverBlendFormula = COEFF_FORMULA(kOne_GrBlendCoeff,
kISA_GrBlendCoeff);
static PorterDuffXferProcessor gSrcOverXP(gSrcOverBlendFormula);
return gSrcOverXP;
}
