void decompose_ft_bitmap_gray8(const FT_Bitmap& bitmap,
int x, int y,
bool flip_y,
Rasterizer& ras,
Scanline& sl,
ScanlineStorage& storage)
{
int i, j;
const int8u* buf = (const int8u*)bitmap.buffer;
int pitch = bitmap.pitch;
sl.reset(x, x + bitmap.width);
storage.prepare(bitmap.width + 2);
if(flip_y)
{
buf += bitmap.pitch * (bitmap.rows - 1);
y += bitmap.rows;
pitch = -pitch;
}
for(i = 0; i < bitmap.rows; i++)
{
sl.reset_spans();
const int8u* p = buf;
for(j = 0; j < bitmap.width; j++)
{
if(*p) sl.add_cell(x + j, ras.apply_gamma(*p));
++p;
}
buf += pitch;
if(sl.num_spans())
{
sl.finalize(y - i - 1);
storage.render(sl);
}
}
}
void decompose_ft_bitmap_mono(const FT_Bitmap& bitmap,
int x, int y,
bool flip_y,
Scanline& sl,
ScanlineStorage& storage)
{
int i;
const int8u* buf = (const int8u*)bitmap.buffer;
int pitch = bitmap.pitch;
sl.reset(x, x + bitmap.width);
storage.prepare(bitmap.width + 2);
if(flip_y)
{
buf += bitmap.pitch * (bitmap.rows - 1);
y += bitmap.rows;
pitch = -pitch;
}
for(i = 0; i < bitmap.rows; i++)
{
sl.reset_spans();
bitset_iterator bits(buf, 0);
int j;
for(j = 0; j < bitmap.width; j++)
{
if(bits.bit()) sl.add_cell(x + j, cover_full);
++bits;
}
buf += pitch;
if(sl.num_spans())
{
sl.finalize(y - i - 1);
storage.render(sl);
}
}
}