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[base] Fix thinko in previous commit. 

* src/base/ftbitmap.c (FT_Bitmap_Blend): Check final width, not
target pitch.

Problem reported by Sender Ghost <lightside@gmx.com>.
This commit is contained in:
Werner Lemberg 2019-04-23 06:49:56 +02:00
parent 9f6ed10545
commit 4166c45360
2 changed files with 19 additions and 10 deletions
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9
ChangeLog
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@ -1,3 +1,12 @@
2019-04-23 Werner Lemberg <wl@gnu.org>
[base] Fix thinko in previous commit.
* src/base/ftbitmap.c (FT_Bitmap_Blend): Check final width, not
target pitch.
Problem reported by Sender Ghost <lightside@gmx.com>.
2019-04-22 Werner Lemberg <wl@gnu.org>
* src/base/ftbitmap.c (FT_Bitmap_Blend): Check target pitch.

20
src/base/ftbitmap.c
View File

@ -922,12 +922,18 @@
else
FT_TRACE5(( " target bitmap: empty\n" ));
FT_TRACE5(( " final bitmap: (%d, %d) -- (%d, %d); %d x %d\n",
final_llx / 64, final_lly / 64,
final_urx / 64, final_ury / 64,
final_width, final_rows ));
if ( final_width && final_rows )
FT_TRACE5(( " final bitmap: (%d, %d) -- (%d, %d); %d x %d\n",
final_llx / 64, final_lly / 64,
final_urx / 64, final_ury / 64,
final_width, final_rows ));
else
FT_TRACE5(( " final bitmap: empty\n" ));
#endif /* FT_DEBUG_LEVEL_TRACE */
if ( !( final_width && final_rows ) )
return FT_Err_Ok; /* nothing to do */
/* for blending, set offset vector of final bitmap */
/* temporarily to (0,0) */
source_llx -= final_llx;
@ -971,12 +977,6 @@
pitch = target->pitch;
if ( !pitch )
{
FT_TRACE5(( "FT_Blend_Bitmap:"
" zero target bitmap pitch is invalid\n" ));
return FT_THROW( Invalid_Argument );
}
if ( pitch < 0 )
pitch = -pitch;