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Fix a mixup in the handling of dest_channels. (#111922, Christophe

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Sun Aug 22 03:20:56 2004  Matthias Clasen  <maclas@gmx.de>

	* pixops/pixops.c (pixops_scale_nearest): Fix a mixup in the handling
	of dest_channels.  (#111922, Christophe Fergeau)
This commit is contained in:
Matthias Clasen 2004-08-22 07:22:39 +00:00 committed by Matthias Clasen
parent 07b5626f00
commit 33c74e3076
2 changed files with 23 additions and 19 deletions
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5
gdk-pixbuf/ChangeLog
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@ -1,3 +1,8 @@
Sun Aug 22 03:20:56 2004 Matthias Clasen <maclas@gmx.de>
* pixops/pixops.c (pixops_scale_nearest): Fix a mixup in the handling
of dest_channels. (#111922, Christophe Fergeau)
Fri Aug 20 11:59:10 2004 Owen Taylor <otaylor@redhat.com>
* io-bmp.c: Fix infinite loop that can occur for bad

37
gdk-pixbuf/pixops/pixops.c
View File

@ -78,32 +78,32 @@ pixops_scale_nearest (guchar *dest_buf,
int xmax, xstart, xstop, x_pos, y_pos;
const guchar *p;
#define INNER_LOOP(SRC_CHANNELS,DEST_CHANNELS,ASSIGN_PIXEL) \
#define INNER_LOOP(SRC_CHANNELS,DEST_CHANNELS,ASSIGN_PIXEL) \
xmax = x + (render_x1 - render_x0) * x_step; \
xstart = MIN (0, xmax); \
xstop = MIN (src_width << SCALE_SHIFT, xmax); \
p = src + (CLAMP (x, xstart, xstop) >> SCALE_SHIFT) * SRC_CHANNELS; \
while (x < xstart) \
{ \
ASSIGN_PIXEL; \
dest += DEST_CHANNELS; \
x += x_step; \
{ \
ASSIGN_PIXEL; \
dest += DEST_CHANNELS; \
x += x_step; \
} \
while (x < xstop) \
{ \
p = src + (x >> SCALE_SHIFT) * SRC_CHANNELS; \
ASSIGN_PIXEL; \
dest += DEST_CHANNELS; \
x += x_step; \
} \
{ \
p = src + (x >> SCALE_SHIFT) * SRC_CHANNELS; \
ASSIGN_PIXEL; \
dest += DEST_CHANNELS; \
x += x_step; \
} \
x_pos = x >> SCALE_SHIFT; \
p = src + CLAMP (x_pos, 0, src_width - 1) * SRC_CHANNELS; \
while (x < xmax) \
{ \
ASSIGN_PIXEL; \
dest += DEST_CHANNELS; \
x += x_step; \
}
ASSIGN_PIXEL; \
dest += DEST_CHANNELS; \
x += x_step; \
}
for (i = 0; i < (render_y1 - render_y0); i++)
{
@ -124,18 +124,18 @@ pixops_scale_nearest (guchar *dest_buf,
}
else
{
INNER_LOOP (3, 4, dest[0]=p[0];dest[1]=p[1];dest[2]=p[2]);
INNER_LOOP (3, 4, dest[0]=p[0];dest[1]=p[1];dest[2]=p[2];dest[3]=0xff);
}
}
else if (src_channels == 4)
{
if (dest_channels == 3)
{
INNER_LOOP (4, 3, dest[0]=p[0];dest[1]=p[1];dest[2]=p[2];dest[3]=0xff);
INNER_LOOP (4, 3, dest[0]=p[0];dest[1]=p[1];dest[2]=p[2]);
}
else
{
gint32 *p32;
guint32 *p32;
INNER_LOOP(4, 4, p32=(guint32*)dest;*p32=*((guint32*)p));
}
}
@ -169,7 +169,6 @@ pixops_composite_nearest (guchar *dest_buf,
const guchar *p;
unsigned int a0;
for (i = 0; i < (render_y1 - render_y0); i++)
{
const guchar *src;