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* src/smooth/ftgrays.c: small optimization, the rasterizer now 

uses the render pool to store its state during its operation,
        this saves about 4 KB of heap for each FT_Library instance
This commit is contained in:
David Turner 2007-01-04 18:00:14 +00:00
parent 8a6c44e673
commit 91bd5ddf17
2 changed files with 63 additions and 28 deletions
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4
ChangeLog
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@ -1,5 +1,9 @@
2007-01-04 David Turner <david@freetype.org>
* src/smooth/ftgrays.c: small optimization, the rasterizer now
uses the render pool to store its state during its operation,
this saves about 4 KB of heap for each FT_Library instance
* src/sfnt/sfobjs.c, src/sfnt/ttkern.c, src/sfnt/ttkern.h,
src/sfnt/ttmtx.c, src/sfnt/ttsbit.c, src/sfnt/ttsbit.h,
src/truetype/ttpload.c, include/freetype/config/ftoption.h:

87
src/smooth/ftgrays.c
View File

@ -169,13 +169,13 @@
#ifndef FT_STATIC_RASTER
#define RAS_ARG PRaster raster
#define RAS_ARG_ PRaster raster,
#define RAS_ARG PWorker worker
#define RAS_ARG_ PWorker worker,
#define RAS_VAR raster
#define RAS_VAR_ raster,
#define RAS_VAR worker
#define RAS_VAR_ worker,
#define ras (*raster)
#define ras (*worker)
#else /* FT_STATIC_RASTER */
@ -186,7 +186,7 @@
#define RAS_VAR /* empty */
#define RAS_VAR_ /* empty */
static TRaster ras;
static TWorker ras;
#endif /* FT_STATIC_RASTER */
@ -260,7 +260,7 @@
} TCell;
typedef struct TRaster_
typedef struct TWorker_
{
TCoord ex, ey;
TPos min_ex, max_ex;
@ -299,7 +299,6 @@
int conic_level;
int cubic_level;
void* memory;
ft_jmp_buf jump_buffer;
void* buffer;
@ -308,9 +307,21 @@
PCell* ycells;
int ycount;
} TWorker, *PWorker;
typedef struct TRaster_
{
void* buffer;
long buffer_size;
int band_size;
void* memory;
PWorker worker;
} TRaster, *PRaster;
/*************************************************************************/
/* */
/* Initialize the cells table. */
@ -672,7 +683,7 @@
ras.cover += delta;
ey1 += incr;
gray_set_cell( raster, ex, ey1 );
gray_set_cell( &ras, ex, ey1 );
delta = (int)( first + first - ONE_PIXEL );
area = (TArea)two_fx * delta;
@ -682,7 +693,7 @@
ras.cover += delta;
ey1 += incr;
gray_set_cell( raster, ex, ey1 );
gray_set_cell( &ras, ex, ey1 );
}
delta = (int)( fy2 - ONE_PIXEL + first );
@ -1044,32 +1055,31 @@
static int
gray_move_to( const FT_Vector* to,
FT_Raster raster )
PWorker worker )
{
TPos x, y;
/* record current cell, if any */
gray_record_cell( (PRaster)raster );
gray_record_cell( worker );
/* start to a new position */
x = UPSCALE( to->x );
y = UPSCALE( to->y );
gray_start_cell( (PRaster)raster, TRUNC( x ), TRUNC( y ) );
gray_start_cell( worker, TRUNC( x ), TRUNC( y ) );
((PRaster)raster)->x = x;
((PRaster)raster)->y = y;
worker->x = x;
worker->y = y;
return 0;
}
static int
gray_line_to( const FT_Vector* to,
FT_Raster raster )
PWorker worker )
{
gray_render_line( (PRaster)raster,
UPSCALE( to->x ), UPSCALE( to->y ) );
gray_render_line( worker, UPSCALE( to->x ), UPSCALE( to->y ) );
return 0;
}
@ -1077,9 +1087,9 @@
static int
gray_conic_to( const FT_Vector* control,
const FT_Vector* to,
FT_Raster raster )
PWorker worker )
{
gray_render_conic( (PRaster)raster, control, to );
gray_render_conic( worker, control, to );
return 0;
}
@ -1088,9 +1098,9 @@
gray_cubic_to( const FT_Vector* control1,
const FT_Vector* control2,
const FT_Vector* to,
FT_Raster raster )
PWorker worker )
{
gray_render_cubic( (PRaster)raster, control1, control2, to );
gray_render_cubic( worker, control1, control2, to );
return 0;
}
@ -1099,10 +1109,10 @@
gray_render_span( int y,
int count,
const FT_Span* spans,
PRaster raster )
PWorker worker )
{
unsigned char* p;
FT_Bitmap* map = &raster->target;
FT_Bitmap* map = &worker->target;
/* first of all, compute the scanline offset */
@ -1766,6 +1776,7 @@
{
const FT_Outline* outline = (const FT_Outline*)params->source;
const FT_Bitmap* target_map = params->target;
PWorker worker;
if ( !raster || !raster->buffer || !raster->buffer_size )
@ -1782,6 +1793,8 @@
outline->contours[outline->n_contours - 1] + 1 )
return ErrRaster_Invalid_Outline;
worker = raster->worker;
/* if direct mode is not set, we must have a target bitmap */
if ( ( params->flags & FT_RASTER_FLAG_DIRECT ) == 0 )
{
@ -1824,6 +1837,8 @@
ras.outline = *outline;
ras.num_cells = 0;
ras.invalid = 1;
ras.band_size = raster->band_size;
ras.num_gray_spans = 0;
if ( target_map )
ras.target = *target_map;
@ -1837,7 +1852,7 @@
ras.render_span_data = params->user;
}
return gray_convert_glyph( (PRaster)raster );
return gray_convert_glyph( worker );
}
@ -1910,10 +1925,26 @@
PRaster rast = (PRaster)raster;
if ( raster && pool_base && pool_size >= 4096 )
gray_init_cells( rast, (char*)pool_base, pool_size );
if ( raster )
{
if ( pool_base && pool_size >= sizeof(TWorker) + 2048 )
{
PWorker worker = (PWorker) pool_base;
rast->band_size = (int)( ( pool_size / sizeof ( TCell ) ) / 8 );
rast->worker = worker;
rast->buffer = pool_base + ((sizeof(TWorker) + sizeof(TCell)-1) & ~(sizeof(TCell)-1));
rast->buffer_size = (long)((pool_base + pool_size) - (char*)rast->buffer) & ~(sizeof(TCell)-1);
rast->band_size = (int)( rast->buffer_size/(sizeof(TCell)*8) );
gray_init_cells( RAS_VAR_ rast->buffer, rast->buffer_size );
}
else
{
rast->buffer = NULL;
rast->buffer_size = 0;
rast->worker = NULL;
}
}
}