void SkRGB16_Black_Blitter::blitMask(const SkMask& mask,
const SkIRect& clip) {
if (mask.fFormat == SkMask::kBW_Format) {
SkRGB16_Black_BlitBW(fDevice, mask, clip);
} else {
uint16_t* SK_RESTRICT device = fDevice.getAddr16(clip.fLeft, clip.fTop);
const uint8_t* SK_RESTRICT alpha = mask.getAddr8(clip.fLeft, clip.fTop);
unsigned width = clip.width();
unsigned height = clip.height();
size_t deviceRB = fDevice.rowBytes() - (width << 1);
unsigned maskRB = mask.fRowBytes - width;
SkASSERT((int)height > 0);
SkASSERT((int)width > 0);
SkASSERT((int)deviceRB >= 0);
SkASSERT((int)maskRB >= 0);
do {
unsigned w = width;
do {
unsigned aa = *alpha++;
*device = SkAlphaMulRGB16(*device, SkAlpha255To256(255 - aa));
device += 1;
} while (--w != 0);
device = (uint16_t*)((char*)device + deviceRB);
alpha += maskRB;
} while (--height != 0);
}
}
virtual void filterSpan16(const uint16_t shader[], int count,
uint16_t result[]) {
// all mul components are the same
unsigned scale = SkAlpha255To256(SkColorGetR(fMul));
if (count > 0) {
do {
*result++ = SkAlphaMulRGB16(*shader++, scale);
} while (--count > 0);
}
}