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freetype2
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Code Issues 4 Releases Wiki Activity

[smooth] Streamline pixmap drawing. 

This gives 2% speed improvement in rendering simple glyphs.

* src/smooth/ftgrays.c (TPixmap): Reduced pixmap descriptor with a
pointer to its bottom-left and pitch to be used in...
(gray_TWorker): ... here.
(gray_render_span): Move pixmap flow check from here...
(gray_raster_render): .. to here.
This commit is contained in:
Alexei Podtelezhnikov 2016-08-29 23:15:35 -04:00
parent a6ee6fe67b
commit e73055c791
2 changed files with 28 additions and 9 deletions
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12
ChangeLog
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@ -1,3 +1,15 @@
2016-08-29 Alexei Podtelezhnikov <apodtele@gmail.com>
[smooth] Streamline pixmap drawing.
This gives 2% speed improvement in rendering simple glyphs.
* src/smooth/ftgrays.c (TPixmap): Reduced pixmap descriptor with a
pointer to its bottom-left and pitch to be used in...
(gray_TWorker): ... here.
(gray_render_span): Move pixmap flow check from here...
(gray_raster_render): .. to here.
2016-08-27 Alexei Podtelezhnikov <apodtele@gmail.com>
[smooth] Reduce stack of band boundaries.

25
src/smooth/ftgrays.c
View File

@ -403,6 +403,12 @@ typedef ptrdiff_t FT_PtrDist;
} TCell;
typedef struct TPixmap_
{
unsigned char* origin; /* pixmap origin at the bottom-left */
int pitch; /* pitch to go down one row */
} TPixmap;
/* maximum number of gray cells in the buffer */
#if FT_RENDER_POOL_SIZE > 2048
@ -440,7 +446,7 @@ typedef ptrdiff_t FT_PtrDist;
TPos x, y;
FT_Outline outline;
FT_Bitmap target;
TPixmap target;
FT_Raster_Span_Func render_span;
void* render_span_data;
@ -1270,15 +1276,9 @@ typedef ptrdiff_t FT_PtrDist;
const FT_Span* spans,
gray_PWorker worker )
{
unsigned char* p;
FT_Bitmap* map = &worker->target;
unsigned char* p = worker->target.origin - y * worker->target.pitch;
/* first of all, compute the scanline offset */
p = (unsigned char*)map->buffer - y * map->pitch;
if ( map->pitch >= 0 )
p += ( map->rows - 1 ) * (unsigned int)map->pitch;
for ( ; count > 0; count--, spans++ )
{
unsigned char coverage = spans->coverage;
@ -1962,7 +1962,14 @@ typedef ptrdiff_t FT_PtrDist;
if ( !target_map->buffer )
return FT_THROW( Invalid_Argument );
ras.target = *target_map;
if ( target_map->pitch < 0 )
ras.target.origin = target_map->buffer;
else
ras.target.origin = target_map->buffer
+ ( target_map->rows - 1 ) * (unsigned int)target_map->pitch;
ras.target.pitch = target_map->pitch;
ras.render_span = (FT_Raster_Span_Func)gray_render_span;
ras.render_span_data = &ras;
}