ref: e73055c791776ec35cb43c39614d35ec5fd99539
parent: a6ee6fe67b7336e2b4bb4d0b881e7ef5e65f07a2
author: Alexei Podtelezhnikov <[email protected]>
date: Mon Aug 29 19:15:35 EDT 2016
[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.
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,15 @@
+2016-08-29 Alexei Podtelezhnikov <[email protected]>
+
+ [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 <[email protected]>
[smooth] Reduce stack of band boundaries.
--- a/src/smooth/ftgrays.c
+++ b/src/smooth/ftgrays.c
@@ -403,7 +403,13 @@
} 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
#define FT_MAX_GRAY_POOL ( FT_RENDER_POOL_SIZE / sizeof ( TCell ) )
@@ -440,7 +446,7 @@
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 @@
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 @@
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;
}