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Fix Savannah bug #30263. 

* src/smooth/ftgrays.c (gray_render_span): Use cast to `unsigned
int' to avoid integer overflow.

* src/smooth/ftsmooth.c (ft_smooth_render_generic): Use smaller
threshold values for `width' and `height'.  This is not directly
related to the bug fix but makes sense anyway.
This commit is contained in:
Werner Lemberg 2010-06-30 18:24:33 +02:00
parent 0ae6cf214f
commit 6305b869d8
3 changed files with 14 additions and 3 deletions
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11
ChangeLog
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@ -1,3 +1,14 @@
2010-06-30 Werner Lemberg <wl@gnu.org>
Fix Savannah bug #30263.
* src/smooth/ftgrays.c (gray_render_span): Use cast to `unsigned
int' to avoid integer overflow.
* src/smooth/ftsmooth.c (ft_smooth_render_generic): Use smaller
threshold values for `width' and `height'. This is not directly
related to the bug fix but makes sense anyway.
2010-06-30 Alexei Podtelezhnikov <apodtele@gmail.com>
Minor optimizations by avoiding divisions.

2
src/smooth/ftgrays.c
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@ -1186,7 +1186,7 @@
/* first of all, compute the scanline offset */
p = (unsigned char*)map->buffer - y * map->pitch;
if ( map->pitch >= 0 )
p += ( map->rows - 1 ) * map->pitch;
p += (unsigned)( ( map->rows - 1 ) * map->pitch );
for ( ; count > 0; count--, spans++ )
{

4
src/smooth/ftsmooth.c
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@ -4,7 +4,7 @@
/* */
/* Anti-aliasing renderer interface (body). */
/* */
/* Copyright 2000-2001, 2002, 2003, 2004, 2005, 2006, 2009 by */
/* Copyright 2000-2001, 2002, 2003, 2004, 2005, 2006, 2009, 2010 by */
/* David Turner, Robert Wilhelm, and Werner Lemberg. */
/* */
/* This file is part of the FreeType project, and may only be used, */
@ -200,7 +200,7 @@
/* Required check is ( pitch * height < FT_ULONG_MAX ), */
/* but we care realistic cases only. Always pitch <= width. */
if ( width > 0xFFFFU || height > 0xFFFFU )
if ( width > 0x7FFFU || height > 0x7FFFU )
{
FT_ERROR(( "ft_smooth_render_generic: glyph too large: %d x %d\n",
width, height ));