virtual void blitRect(int x, int y, int width, int height) {
SkASSERT(width > 0 && height > 0);
SK_RESTRICT SkPMColor* dst = fDevice->getAddr32(x, y);
const SK_RESTRICT SkPMColor16* src = fSource->getAddr16(x - fLeft,
y - fTop);
unsigned dstRB = fDevice->rowBytes();
unsigned srcRB = fSource->rowBytes();
SK_RESTRICT SkPMColor* buffer = fBuffer;
SkColorFilter* colorFilter = fColorFilter;
SkXfermode* xfermode = fXfermode;
do {
fillbuffer(buffer, src, width);
if (NULL != colorFilter) {
colorFilter->filterSpan(buffer, width, buffer);
}
if (NULL != xfermode) {
xfermode->xfer32(dst, buffer, width, NULL);
} else {
fProc32(dst, buffer, width, fAlpha);
}
dst = (SK_RESTRICT SkPMColor*)((char*)dst + dstRB);
src = (const SK_RESTRICT SkPMColor16*)((const char*)src + srcRB);
} while (--height != 0);
}
