static void convertToIndex666(const SkBitmap& src, SkBitmap* dst) { SkColorTable* ctable = new SkColorTable(216); SkPMColor* colors = ctable->lockColors(); // rrr ggg bbb for (int r = 0; r < 6; r++) { int rr = conv6ToByte(r); for (int g = 0; g < 6; g++) { int gg = conv6ToByte(g); for (int b = 0; b < 6; b++) { int bb = conv6ToByte(b); *colors++ = SkPreMultiplyARGB(0xFF, rr, gg, bb); } } } ctable->unlockColors(true); dst->setConfig(SkBitmap::kIndex8_Config, src.width(), src.height()); dst->allocPixels(ctable); ctable->unref(); SkAutoLockPixels alps(src); SkAutoLockPixels alpd(*dst); for (int y = 0; y < src.height(); y++) { const SkPMColor* srcP = src.getAddr32(0, y); uint8_t* dstP = dst->getAddr8(0, y); for (int x = src.width() - 1; x >= 0; --x) { *dstP++ = compute666Index(*srcP++); } } }
static void convertToIndex666(const SkBitmap& src, SkBitmap* dst, SkAlphaType aType) { SkPMColor storage[216]; SkPMColor* colors = storage; // rrr ggg bbb for (int r = 0; r < 6; r++) { int rr = conv6ToByte(r); for (int g = 0; g < 6; g++) { int gg = conv6ToByte(g); for (int b = 0; b < 6; b++) { int bb = conv6ToByte(b); *colors++ = SkPreMultiplyARGB(0xFF, rr, gg, bb); } } } SkColorTable* ctable = new SkColorTable(storage, 216); dst->allocPixels(SkImageInfo::Make(src.width(), src.height(), kIndex_8_SkColorType, aType), NULL, ctable); ctable->unref(); SkAutoLockPixels alps(src); SkAutoLockPixels alpd(*dst); for (int y = 0; y < src.height(); y++) { const SkPMColor* srcP = src.getAddr32(0, y); uint8_t* dstP = dst->getAddr8(0, y); for (int x = src.width() - 1; x >= 0; --x) { *dstP++ = compute666Index(*srcP++); } } }