static void copyFT2LCD16(const SkGlyph& glyph, const FT_Bitmap& bitmap,
int lcdIsBGR, bool lcdIsVert, const uint8_t* tableR,
const uint8_t* tableG, const uint8_t* tableB) {
if (lcdIsVert) {
SkASSERT(3 * glyph.fHeight == bitmap.rows);
} else {
SkASSERT(glyph.fHeight == bitmap.rows);
}
uint16_t* dst = reinterpret_cast<uint16_t*>(glyph.fImage);
const size_t dstRB = glyph.rowBytes();
const int width = glyph.fWidth;
const uint8_t* src = bitmap.buffer;
switch (bitmap.pixel_mode) {
case FT_PIXEL_MODE_MONO: {
for (int y = 0; y < glyph.fHeight; ++y) {
for (int x = 0; x < width; ++x) {
dst[x] = -bittst(src, x);
}
dst = (uint16_t*)((char*)dst + dstRB);
src += bitmap.pitch;
}
} break;
case FT_PIXEL_MODE_GRAY: {
for (int y = 0; y < glyph.fHeight; ++y) {
for (int x = 0; x < width; ++x) {
dst[x] = grayToRGB16(src[x]);
}
dst = (uint16_t*)((char*)dst + dstRB);
src += bitmap.pitch;
}
} break;
default: {
SkASSERT(lcdIsVert || (glyph.fWidth * 3 == bitmap.width));
for (int y = 0; y < glyph.fHeight; y++) {
if (lcdIsVert) { // vertical stripes
const uint8_t* srcR = src;
const uint8_t* srcG = srcR + bitmap.pitch;
const uint8_t* srcB = srcG + bitmap.pitch;
if (lcdIsBGR) {
SkTSwap(srcR, srcB);
}
for (int x = 0; x < width; x++) {
dst[x] = packTriple(sk_apply_lut_if<APPLY_PREBLEND>(*srcR++, tableR),
sk_apply_lut_if<APPLY_PREBLEND>(*srcG++, tableG),
sk_apply_lut_if<APPLY_PREBLEND>(*srcB++, tableB));
}
src += 3 * bitmap.pitch;
} else { // horizontal stripes
const uint8_t* triple = src;
if (lcdIsBGR) {
for (int x = 0; x < width; x++) {
dst[x] = packTriple(sk_apply_lut_if<APPLY_PREBLEND>(triple[2], tableR),
sk_apply_lut_if<APPLY_PREBLEND>(triple[1], tableG),
sk_apply_lut_if<APPLY_PREBLEND>(triple[0], tableB));
triple += 3;
}
} else {
for (int x = 0; x < width; x++) {
dst[x] = packTriple(sk_apply_lut_if<APPLY_PREBLEND>(triple[0], tableR),
sk_apply_lut_if<APPLY_PREBLEND>(triple[1], tableG),
sk_apply_lut_if<APPLY_PREBLEND>(triple[2], tableB));
triple += 3;
}
}
src += bitmap.pitch;
}
dst = (uint16_t*)((char*)dst + dstRB);
}
} break;
}
}
static void copyFT2LCD16(const FT_Bitmap& bitmap, const SkMask& mask, int lcdIsBGR,
const uint8_t* tableR, const uint8_t* tableG, const uint8_t* tableB)
{
SkASSERT(SkMask::kLCD16_Format == mask.fFormat);
if (FT_PIXEL_MODE_LCD != bitmap.pixel_mode) {
SkASSERT(mask.fBounds.width() == static_cast<int>(bitmap.width));
}
if (FT_PIXEL_MODE_LCD_V != bitmap.pixel_mode) {
SkASSERT(mask.fBounds.height() == static_cast<int>(bitmap.rows));
}
const uint8_t* src = bitmap.buffer;
uint16_t* dst = reinterpret_cast<uint16_t*>(mask.fImage);
const size_t dstRB = mask.fRowBytes;
const int width = mask.fBounds.width();
const int height = mask.fBounds.height();
switch (bitmap.pixel_mode) {
case FT_PIXEL_MODE_MONO:
for (int y = height; y --> 0;) {
for (int x = 0; x < width; ++x) {
dst[x] = -bittst(src, x);
}
dst = (uint16_t*)((char*)dst + dstRB);
src += bitmap.pitch;
}
break;
case FT_PIXEL_MODE_GRAY:
for (int y = height; y --> 0;) {
for (int x = 0; x < width; ++x) {
dst[x] = grayToRGB16(src[x]);
}
dst = (uint16_t*)((char*)dst + dstRB);
src += bitmap.pitch;
}
break;
case FT_PIXEL_MODE_LCD:
SkASSERT(3 * mask.fBounds.width() == static_cast<int>(bitmap.width));
for (int y = height; y --> 0;) {
const uint8_t* triple = src;
if (lcdIsBGR) {
for (int x = 0; x < width; x++) {
dst[x] = packTriple(sk_apply_lut_if<APPLY_PREBLEND>(triple[2], tableR),
sk_apply_lut_if<APPLY_PREBLEND>(triple[1], tableG),
sk_apply_lut_if<APPLY_PREBLEND>(triple[0], tableB));
triple += 3;
}
} else {
for (int x = 0; x < width; x++) {
dst[x] = packTriple(sk_apply_lut_if<APPLY_PREBLEND>(triple[0], tableR),
sk_apply_lut_if<APPLY_PREBLEND>(triple[1], tableG),
sk_apply_lut_if<APPLY_PREBLEND>(triple[2], tableB));
triple += 3;
}
}
src += bitmap.pitch;
dst = (uint16_t*)((char*)dst + dstRB);
}
break;
case FT_PIXEL_MODE_LCD_V:
SkASSERT(3 * mask.fBounds.height() == static_cast<int>(bitmap.rows));
for (int y = height; y --> 0;) {
const uint8_t* srcR = src;
const uint8_t* srcG = srcR + bitmap.pitch;
const uint8_t* srcB = srcG + bitmap.pitch;
if (lcdIsBGR) {
SkTSwap(srcR, srcB);
}
for (int x = 0; x < width; x++) {
dst[x] = packTriple(sk_apply_lut_if<APPLY_PREBLEND>(*srcR++, tableR),
sk_apply_lut_if<APPLY_PREBLEND>(*srcG++, tableG),
sk_apply_lut_if<APPLY_PREBLEND>(*srcB++, tableB));
}
src += 3 * bitmap.pitch;
dst = (uint16_t*)((char*)dst + dstRB);
}
break;
default:
SkDEBUGF(("FT_Pixel_Mode %d", bitmap.pixel_mode));
SkDEBUGFAIL("unsupported FT_Pixel_Mode for LCD16");
break;
}
}
