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[smooth] Fix segfault in direct mode (#56092).

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* src/base/ftoutln.c (FT_Outline_Render): Set missing clip_box for
direct mode.
* src/smooth/ftgrays.c (gray_raster_render): Use it.
This commit is contained in:
Alexei Podtelezhnikov 2019-04-11 23:48:21 -04:00
parent f0384d5fb0
commit 1f271751a3
3 changed files with 29 additions and 20 deletions
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8
ChangeLog
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@ -1,3 +1,11 @@
2019-04-11 Alexei Podtelezhnikov <apodtele@gmail.com>
[smooth] Fix segfault in direct mode (#56092).
* src/base/ftoutln.c (FT_Outline_Render): Set missing clip_box for
direct mode.
* src/smooth/ftgrays.c (gray_raster_render): Use it.
2019-04-06 Werner Lemberg <wl@gnu.org>
* src/sfnt/ttcmap.c (tt_get_glyph_name): Pacify compiler (#56061).

10
src/base/ftoutln.c
View File

@ -621,6 +621,16 @@
params->source = (void*)outline;
/* preset clip_box for direct mode */
if ( params->flags & FT_RASTER_FLAG_DIRECT &&
!( params->flags & FT_RASTER_FLAG_CLIP ) )
{
params->clip_box.xMin = cbox.xMin >> 6;
params->clip_box.yMin = cbox.yMin >> 6;
params->clip_box.xMax = ( cbox.xMax + 63 ) >> 6;
params->clip_box.yMax = ( cbox.yMax + 63 ) >> 6;
}
error = FT_ERR( Cannot_Render_Glyph );
while ( renderer )
{

31
src/smooth/ftgrays.c
View File

@ -1755,7 +1755,6 @@ typedef ptrdiff_t FT_PtrDist;
{
const FT_Outline* outline = (const FT_Outline*)params->source;
const FT_Bitmap* target_map = params->target;
FT_BBox clip;
#ifndef FT_STATIC_RASTER
gray_TWorker worker[1];
@ -1792,6 +1791,11 @@ 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;
}
else
{
@ -1816,27 +1820,14 @@ 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;
}
/* compute clipping box */
if ( params->flags & FT_RASTER_FLAG_DIRECT &&
params->flags & FT_RASTER_FLAG_CLIP )
clip = params->clip_box;
else
{
/* compute clip box from target pixmap */
clip.xMin = 0;
clip.yMin = 0;
clip.xMax = (FT_Pos)target_map->width;
clip.yMax = (FT_Pos)target_map->rows;
}
/* clip to target bitmap, exit if nothing to do */
ras.min_ex = clip.xMin;
ras.min_ey = clip.yMin;
ras.max_ex = clip.xMax;
ras.max_ey = clip.yMax;
/* exit if nothing to do */
if ( ras.max_ex <= ras.min_ex || ras.max_ey <= ras.min_ey )
return 0;