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[smooth] Store persistent clipping box.

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* src/smooth/ftgrays.c (gray_TWorker, gray_raster_render): Add and set
the new structure field.
(gray_convert_glyph): Use it.
This commit is contained in:
Alexei Podtelezhnikov 2024-04-14 13:06:01 -04:00
parent f42ce25563
commit 674d629b5e
1 changed files with 15 additions and 16 deletions
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31
src/smooth/ftgrays.c
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@ -489,7 +489,7 @@ typedef ptrdiff_t FT_PtrDist;
typedef struct gray_TWorker_
{
ft_jmp_buf jump_buffer;
FT_BBox cbox;
TCoord min_ex, max_ex; /* min and max integer pixel coordinates */
TCoord min_ey, max_ey;
@ -510,6 +510,8 @@ typedef ptrdiff_t FT_PtrDist;
FT_Raster_Span_Func render_span;
void* render_span_data;
ft_jmp_buf jump_buffer;
} gray_TWorker, *gray_PWorker;
#if defined( _MSC_VER )
@ -1863,11 +1865,8 @@ typedef ptrdiff_t FT_PtrDist;
static int
gray_convert_glyph( RAS_ARG )
{
const TCoord yMin = ras.min_ey;
const TCoord yMax = ras.max_ey;
TCell buffer[FT_MAX_GRAY_POOL];
size_t height = (size_t)( yMax - yMin );
size_t height = (size_t)( ras.cbox.yMax - ras.cbox.yMin );
size_t n = FT_MAX_GRAY_POOL / 8;
TCoord y;
TCoord bands[32]; /* enough to accommodate bisections */
@ -1893,11 +1892,14 @@ typedef ptrdiff_t FT_PtrDist;
height = ( height + n - 1 ) / n;
}
for ( y = yMin; y < yMax; )
ras.min_ex = ras.cbox.xMin;
ras.max_ex = ras.cbox.xMax;
for ( y = ras.cbox.yMin; y < ras.cbox.yMax; )
{
ras.min_ey = y;
y += height;
ras.max_ey = FT_MIN( y, yMax );
ras.max_ey = FT_MIN( y, ras.cbox.yMax );
band = bands;
band[1] = ras.min_ey;
@ -2001,10 +2003,7 @@ typedef ptrdiff_t FT_PtrDist;
ras.render_span = (FT_Raster_Span_Func)params->gray_spans;
ras.render_span_data = params->user;
ras.min_ex = params->clip_box.xMin;
ras.min_ey = params->clip_box.yMin;
ras.max_ex = params->clip_box.xMax;
ras.max_ey = params->clip_box.yMax;
ras.cbox = params->clip_box;
}
else
{
@ -2030,14 +2029,14 @@ typedef ptrdiff_t FT_PtrDist;
ras.render_span = (FT_Raster_Span_Func)NULL;
ras.render_span_data = NULL;
ras.min_ex = 0;
ras.min_ey = 0;
ras.max_ex = (FT_Pos)target_map->width;
ras.max_ey = (FT_Pos)target_map->rows;
ras.cbox.xMin = 0;
ras.cbox.yMin = 0;
ras.cbox.xMax = (FT_Pos)target_map->width;
ras.cbox.yMax = (FT_Pos)target_map->rows;
}
/* exit if nothing to do */
if ( ras.max_ex <= ras.min_ex || ras.max_ey <= ras.min_ey )
if ( ras.cbox.xMin >= ras.cbox.xMax || ras.cbox.yMin >= ras.cbox.yMax )
return Smooth_Err_Ok;
return gray_convert_glyph( RAS_VAR );