AuroraMiddleware/skia2
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

promote embedded bitmaps for lcd16

Browse Source 
git-svn-id: http://skia.googlecode.com/svn/trunk@1679 2bbb7eff-a529-9590-31e7-b0007b416f81
This commit is contained in:
reed@google.com 2011-06-23 13:17:30 +00:00
parent 3c1412f717
commit 73824072a9
1 changed files with 49 additions and 14 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

63
src/ports/SkFontHost_FreeType.cpp
View File

@ -1004,23 +1004,56 @@ static uint16_t packTriple(unsigned r, unsigned g, unsigned b) {
return SkPackRGB16(r >> 3, g >> 2, b >> 3);
}
static uint16_t grayToRGB16(U8CPU gray) {
SkASSERT(gray <= 255);
return SkPackRGB16(gray >> 3, gray >> 2, gray >> 3);
}
static int bittst(const uint8_t data[], int bitOffset) {
SkASSERT(bitOffset >= 0);
int lowBit = data[bitOffset >> 3] >> (1 << (~bitOffset & 7));
return lowBit & 1;
}
static void copyFT2LCD16(const SkGlyph& glyph, const FT_Bitmap& bitmap) {
SkASSERT(glyph.fWidth * 3 == bitmap.width - 6);
SkASSERT(glyph.fHeight == bitmap.rows);
const uint8_t* src = bitmap.buffer + 3;
uint16_t* dst = reinterpret_cast<uint16_t*>(glyph.fImage);
size_t dstRB = glyph.rowBytes();
int width = glyph.fWidth;
const size_t dstRB = glyph.rowBytes();
const int width = glyph.fWidth;
const uint8_t* src = bitmap.buffer;
for (int y = 0; y < glyph.fHeight; y++) {
const uint8_t* triple = src;
for (int x = 0; x < width; x++) {
dst[x] = packTriple(triple[0], triple[1], triple[2]);
triple += 3;
}
src += bitmap.pitch;
dst = (uint16_t*)((char*)dst + dstRB);
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(glyph.fWidth * 3 == bitmap.width - 6);
src += 3;
for (int y = 0; y < glyph.fHeight; y++) {
const uint8_t* triple = src;
for (int x = 0; x < width; x++) {
dst[x] = packTriple(triple[0], triple[1], triple[2]);
triple += 3;
}
src += bitmap.pitch;
dst = (uint16_t*)((char*)dst + dstRB);
}
} break;
}
}
@ -1159,8 +1192,10 @@ void SkScalerContext_FreeType::generateImage(const SkGlyph& glyph) {
src += fFace->glyph->bitmap.pitch;
dst += glyph.rowBytes();
}
} else if (SkMask::kLCD16_Format == glyph.fMaskFormat) {
copyFT2LCD16(glyph, fFace->glyph->bitmap);
} else {
SkASSERT(!"unknown glyph bitmap transform needed");
SkASSERT(!"unknown glyph bitmap transform needed");
}
if (lcdRenderMode)