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* src/raster/ftraster.c: removing dynamically generated "count_table", 

and replace it with a constant array of bytes
This commit is contained in:
David Turner 2007-01-04 18:50:12 +00:00
parent 8a2c7f8fb8
commit 38d1002b8a
2 changed files with 27 additions and 22 deletions
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3
ChangeLog
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@ -1,5 +1,8 @@
2007-01-04 David Turner <david@freetype.org>
* src/raster/ftraster.c: removing dynamically generated "count_table",
and replace it with a constant array of bytes
* src/raster/ftraster.c, src/smooth/ftgrays.c: small optimization, the
rasterizers now uses the render pool to store their state during scanline
convertion. this saves about 6 KB of heap space for each FT_Library instance

46
src/raster/ftraster.c
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@ -498,8 +498,6 @@
TBand band_stack[16]; /* band stack used for sub-banding */
Int band_top; /* band stack top */
Int* count_table;
#ifdef FT_RASTER_OPTION_ANTI_ALIASING
Byte* grays;
@ -528,8 +526,6 @@
long buffer_size;
void* memory;
PWorker worker;
Int count_table[256]; /* Look-up table used to quickly count */
/* set bits in a gray 2x2 cell */
Byte grays[5];
Short gray_width;
@ -547,6 +543,27 @@
#endif /* FT_STATIC_RASTER */
static const char count_table[256] =
{
0 , 1 , 1 , 2 , 1 , 2 , 2 , 3 , 1 , 2 , 2 , 3 , 2 , 3 , 3 , 4,
1 , 2 , 2 , 3 , 2 , 3 , 3 , 4 , 2 , 3 , 3 , 4 , 3 , 4 , 4 , 5,
1 , 2 , 2 , 3 , 2 , 3 , 3 , 4 , 2 , 3 , 3 , 4 , 3 , 4 , 4 , 5,
2 , 3 , 3 , 4 , 3 , 4 , 4 , 5 , 3 , 4 , 4 , 5 , 4 , 5 , 5 , 6,
1 , 2 , 2 , 3 , 2 , 3 , 3 , 4 , 2 , 3 , 3 , 4 , 3 , 4 , 4 , 5,
2 , 3 , 3 , 4 , 3 , 4 , 4 , 5 , 3 , 4 , 4 , 5 , 4 , 5 , 5 , 6,
2 , 3 , 3 , 4 , 3 , 4 , 4 , 5 , 3 , 4 , 4 , 5 , 4 , 5 , 5 , 6,
3 , 4 , 4 , 5 , 4 , 5 , 5 , 6 , 4 , 5 , 5 , 6 , 5 , 6 , 6 , 7,
1 , 2 , 2 , 3 , 2 , 3 , 3 , 4 , 2 , 3 , 3 , 4 , 3 , 4 , 4 , 5,
2 , 3 , 3 , 4 , 3 , 4 , 4 , 5 , 3 , 4 , 4 , 5 , 4 , 5 , 5 , 6,
2 , 3 , 3 , 4 , 3 , 4 , 4 , 5 , 3 , 4 , 4 , 5 , 4 , 5 , 5 , 6,
3 , 4 , 4 , 5 , 4 , 5 , 5 , 6 , 4 , 5 , 5 , 6 , 5 , 6 , 6 , 7,
2 , 3 , 3 , 4 , 3 , 4 , 4 , 5 , 3 , 4 , 4 , 5 , 4 , 5 , 5 , 6,
3 , 4 , 4 , 5 , 4 , 5 , 5 , 6 , 4 , 5 , 5 , 6 , 5 , 6 , 6 , 7,
3 , 4 , 4 , 5 , 4 , 5 , 5 , 6 , 4 , 5 , 5 , 6 , 5 , 6 , 6 , 7,
4 , 5 , 5 , 6 , 5 , 6 , 6 , 7 , 5 , 6 , 6 , 7 , 6 , 7 , 7 , 8 };
/*************************************************************************/
/*************************************************************************/
/** **/
@ -2494,7 +2511,7 @@
{
Int c1, c2;
PByte pix, bit, bit2;
Int* count = ras.count_table;
char* count = (char*)count_table;
Byte* grays;
@ -3155,24 +3172,10 @@
static void
ft_black_init( PRaster raster )
{
FT_UInt n;
FT_ULong c;
/* setup count table */
for ( n = 0; n < 256; n++ )
{
c = ( n & 0x55 ) + ( ( n & 0xAA ) >> 1 );
c = ( ( c << 6 ) & 0x3000 ) |
( ( c << 4 ) & 0x0300 ) |
( ( c << 2 ) & 0x0030 ) |
(c & 0x0003 );
raster->count_table[n] = (UInt)c;
}
FT_UNUSED( raster );
#ifdef FT_RASTER_OPTION_ANTI_ALIASING
FT_UInt n;
/* set default 5-levels gray palette */
for ( n = 0; n < 5; n++ )
@ -3335,7 +3338,6 @@
ras.outline = *outline;
ras.target = *target_map;
worker->count_table = raster->count_table;
worker->buff = (PLong) raster->buffer;
worker->sizeBuff = worker->buff + raster->buffer_size/sizeof(Long);
#ifdef FT_RASTER_OPTION_ANTI_ALIASING