static uint16_t lighten_modeproc16_255(SkPMColor src, uint16_t dst) {
SkASSERT(require_255(src));
unsigned r = SkMax32(SkPacked32ToR16(src), SkGetPackedR16(dst));
unsigned g = SkMax32(SkPacked32ToG16(src), SkGetPackedG16(dst));
unsigned b = SkMax32(SkPacked32ToB16(src), SkGetPackedB16(dst));
return SkPackRGB16(r, g, b);
}
static uint16_t srcatop_modeproc16(SkPMColor src, uint16_t dst) {
unsigned isa = 255 - SkGetPackedA32(src);
return SkPackRGB16(
SkPacked32ToR16(src) + SkAlphaMulAlpha(SkGetPackedR16(dst), isa),
SkPacked32ToG16(src) + SkAlphaMulAlpha(SkGetPackedG16(dst), isa),
SkPacked32ToB16(src) + SkAlphaMulAlpha(SkGetPackedB16(dst), isa));
}
static inline U16CPU SkBlend3216(SkPMColor src, U16CPU dst, unsigned scale) {
SkASSERT(scale <= 32);
scale <<= 3;
return SkPackRGB16(SkAlphaBlend(SkPacked32ToR16(src), SkGetPackedR16(dst), scale),
SkAlphaBlend(SkPacked32ToG16(src), SkGetPackedG16(dst), scale),
SkAlphaBlend(SkPacked32ToB16(src), SkGetPackedB16(dst), scale));
}
static inline void D16_S32A_Blend_Pixel_helper(uint16_t* dst, SkPMColor sc,
unsigned src_scale) {
uint16_t dc = *dst;
unsigned sa = SkGetPackedA32(sc);
unsigned dr, dg, db;
if (255 == sa) {
dr = SkAlphaBlend(SkPacked32ToR16(sc), SkGetPackedR16(dc), src_scale);
dg = SkAlphaBlend(SkPacked32ToG16(sc), SkGetPackedG16(dc), src_scale);
db = SkAlphaBlend(SkPacked32ToB16(sc), SkGetPackedB16(dc), src_scale);
} else {
unsigned dst_scale = 255 - SkAlphaMul(sa, src_scale);
dr = (SkPacked32ToR16(sc) * src_scale + SkGetPackedR16(dc) * dst_scale) >> 8;
dg = (SkPacked32ToG16(sc) * src_scale + SkGetPackedG16(dc) * dst_scale) >> 8;
db = (SkPacked32ToB16(sc) * src_scale + SkGetPackedB16(dc) * dst_scale) >> 8;
}
*dst = SkPackRGB16(dr, dg, db);
}
