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Avoid an FPE for ludicrous scale values

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...just bail out early.
This commit is contained in:
Matthias Clasen 2010-01-08 13:20:28 -05:00
parent f5b21802bb
commit 1d4c6ebe5f
1 changed files with 13 additions and 4 deletions
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17
gdk-pixbuf/pixops/pixops.c
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@ -1251,11 +1251,20 @@ pixops_process (guchar *dest_buf,
int i, j;
int x, y; /* X and Y position in source (fixed_point) */
guchar **line_bufs = g_new (guchar *, filter->y.n);
int *filter_weights = make_filter_table (filter);
guchar **line_bufs;
int *filter_weights;
int x_step = (1 << SCALE_SHIFT) / scale_x; /* X step in source (fixed point) */
int y_step = (1 << SCALE_SHIFT) / scale_y; /* Y step in source (fixed point) */
int x_step;
int y_step;
x_step = (1 << SCALE_SHIFT) / scale_x; /* X step in source (fixed point) */
y_step = (1 << SCALE_SHIFT) / scale_y; /* Y step in source (fixed point) */
if (x_step == 0 || y_step == 0)
return; /* overflow, bail out */
line_bufs = g_new (guchar *, filter->y.n);
filter_weights = make_filter_table (filter);
int check_shift = check_size ? get_check_shift (check_size) : 0;