diff options
Diffstat (limited to 'src/core/Sk4pxXfermode.h')
| -rw-r--r-- | src/core/Sk4pxXfermode.h | 60 |
1 files changed, 51 insertions, 9 deletions
diff --git a/src/core/Sk4pxXfermode.h b/src/core/Sk4pxXfermode.h index b4ebd850e3..09490dc990 100644 --- a/src/core/Sk4pxXfermode.h +++ b/src/core/Sk4pxXfermode.h @@ -60,6 +60,44 @@ XFERMODE(Exclusion) { return (s - p) + (d - p.zeroAlphas()); } +XFERMODE(HardLight) { + auto alphas = SrcOver::Xfer(s,d); + + auto sa = s.alphas(), + da = d.alphas(); + + auto isDark = s < (sa-s); + + auto dark = s*d << 1, + lite = sa*da - ((da-d)*(sa-s) << 1), + both = s*da.inv() + d*sa.inv(); + + // TODO: do isDark in 16-bit so we only have to div255() once. + auto colors = isDark.thenElse((dark + both).div255(), + (lite + both).div255()); + return alphas.zeroColors() + colors.zeroAlphas(); +} +XFERMODE(Overlay) { return HardLight::Xfer(d,s); } + +XFERMODE(Darken) { + auto sda = s.approxMulDiv255(d.alphas()), + dsa = d.approxMulDiv255(s.alphas()); + auto srcover = s + (d - dsa), + dstover = d + (s - sda); + auto alphas = srcover, + colors = (sda < dsa).thenElse(srcover, dstover); + return alphas.zeroColors() + colors.zeroAlphas(); +} +XFERMODE(Lighten) { + auto sda = s.approxMulDiv255(d.alphas()), + dsa = d.approxMulDiv255(s.alphas()); + auto srcover = s + (d - dsa), + dstover = d + (s - sda); + auto alphas = srcover, + colors = (sda < dsa).thenElse(dstover, srcover); + return alphas.zeroColors() + colors.zeroAlphas(); +} + #undef XFERMODE // A reasonable fallback mode for doing AA is to simply apply the transfermode first, @@ -71,17 +109,15 @@ static Sk4px xfer_aa(const Sk4px& s, const Sk4px& d, const Sk4px& aa) { } // For some transfermodes we specialize AA, either for correctness or performance. -#ifndef SK_NO_SPECIALIZED_AA_XFERMODES - #define XFERMODE_AA(Name) \ - template <> Sk4px xfer_aa<Name>(const Sk4px& s, const Sk4px& d, const Sk4px& aa) +#define XFERMODE_AA(Name) \ + template <> Sk4px xfer_aa<Name>(const Sk4px& s, const Sk4px& d, const Sk4px& aa) - // Plus' clamp needs to happen after AA. skia:3852 - XFERMODE_AA(Plus) { // [ clamp( (1-AA)D + (AA)(S+D) ) == clamp(D + AA*S) ] - return d.saturatedAdd(s.approxMulDiv255(aa)); - } +// Plus' clamp needs to happen after AA. skia:3852 +XFERMODE_AA(Plus) { // [ clamp( (1-AA)D + (AA)(S+D) ) == clamp(D + AA*S) ] + return d.saturatedAdd(s.approxMulDiv255(aa)); +} - #undef XFERMODE_AA -#endif +#undef XFERMODE_AA template <typename ProcType> class SkT4pxXfermode : public SkProcCoeffXfermode { @@ -130,6 +166,12 @@ static SkProcCoeffXfermode* SkCreate4pxXfermode(const ProcCoeff& rec, SkXfermode case SkXfermode::kMultiply_Mode: return SkT4pxXfermode<Multiply>::Create(rec); case SkXfermode::kDifference_Mode: return SkT4pxXfermode<Difference>::Create(rec); case SkXfermode::kExclusion_Mode: return SkT4pxXfermode<Exclusion>::Create(rec); +#if !defined(SK_SUPPORT_LEGACY_XFERMODES) // For staging in Chrome (layout tests). + case SkXfermode::kHardLight_Mode: return SkT4pxXfermode<HardLight>::Create(rec); + case SkXfermode::kOverlay_Mode: return SkT4pxXfermode<Overlay>::Create(rec); + case SkXfermode::kDarken_Mode: return SkT4pxXfermode<Darken>::Create(rec); + case SkXfermode::kLighten_Mode: return SkT4pxXfermode<Lighten>::Create(rec); +#endif default: break; } #endif |