[ftlcdfil] Obey flow direction. * src/base/ftlcdfil.c (_ft_lcd_filter_fir, _ft_lcd_filter_legacy): Handle `up' flow.
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diff --git a/ChangeLog b/ChangeLog
index 73c8eb8..6dea0e3 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,12 @@
2014-11-21 Werner Lemberg <wl@gnu.org>
+ [ftlcdfil] Obey flow direction.
+
+ * src/base/ftlcdfil.c (_ft_lcd_filter_fir, _ft_lcd_filter_legacy):
+ Handle `up' flow.
+
+2014-11-21 Werner Lemberg <wl@gnu.org>
+
* src/base/ftbitmap.c (FT_Bitmap_Convert): Improve.
This commit completes argument checks and adds support for different
diff --git a/src/base/ftlcdfil.c b/src/base/ftlcdfil.c
index 4aefb68..1f23c4c 100644
--- a/src/base/ftlcdfil.c
+++ b/src/base/ftlcdfil.c
@@ -46,6 +46,10 @@
FT_Byte* line = bitmap->buffer;
+ /* take care of bitmap flow */
+ if ( bitmap->pitch < 0 )
+ line -= bitmap->pitch * ( bitmap->rows - 1 );
+
/* `fir' and `pix' must be at least 32 bit wide, since the sum of */
/* the values in `weights' can exceed 0xFF */
@@ -106,6 +110,10 @@
FT_Int pitch = bitmap->pitch;
+ /* take care of bitmap flow */
+ if ( bitmap->pitch < 0 )
+ column -= bitmap->pitch * ( bitmap->rows - 1 );
+
for ( ; width > 0; width--, column++ )
{
FT_Byte* col = column;
@@ -190,6 +198,10 @@
FT_Byte* line = bitmap->buffer;
+ /* take care of bitmap flow */
+ if ( bitmap->pitch < 0 )
+ line -= bitmap->pitch * ( bitmap->rows - 1 );
+
for ( ; height > 0; height--, line += pitch )
{
FT_UInt xx;
@@ -229,6 +241,10 @@
FT_Byte* column = bitmap->buffer;
+ /* take care of bitmap flow */
+ if ( bitmap->pitch < 0 )
+ column -= bitmap->pitch * ( bitmap->rows - 1 );
+
for ( ; width > 0; width--, column++ )
{
FT_Byte* col = column;