Comments (2)
Thanks!
Do you have a specific image that can be used to repro this issue? I'm not certain how new_pos
could become negative, as the neighbors
bitmasks are created in PixelGrid::initialize()
in such a way that bounds checks should be unnecessary.
from depixelize.
Right after the int new_pos = ...
on line 366, I added
if (new_pos < 0) {
printf("r=%d c=%d pos=%d cur_pos=%d i=%d bitmask=%#02x D[i=%d][0]=%d D[i=%d][1]=%d new_pos=%d\n",
r, c, pos, cur_pos, i, bitmask, i, DIRECTIONS[i][0], i, DIRECTIONS[i][1], new_pos);
continue;
}
I ran depixelize
on smw_mushroom_input.png
. The output looks like
r=0 c=0 pos=0 cur_pos=0 i=7 bitmask=0x85 D[i=7][0]=-1 D[i=7][1]=1 new_pos=-17
r=0 c=0 pos=0 cur_pos=1 i=7 bitmask=0x85 D[i=7][0]=-1 D[i=7][1]=1 new_pos=-16
r=0 c=0 pos=0 cur_pos=2 i=7 bitmask=0x85 D[i=7][0]=-1 D[i=7][1]=1 new_pos=-15
r=0 c=0 pos=0 cur_pos=3 i=7 bitmask=0x85 D[i=7][0]=-1 D[i=7][1]=1 new_pos=-14
r=0 c=0 pos=0 cur_pos=4 i=7 bitmask=0x85 D[i=7][0]=-1 D[i=7][1]=1 new_pos=-13
r=0 c=0 pos=0 cur_pos=5 i=7 bitmask=0x85 D[i=7][0]=-1 D[i=7][1]=1 new_pos=-12
r=0 c=0 pos=0 cur_pos=6 i=7 bitmask=0x89 D[i=7][0]=-1 D[i=7][1]=1 new_pos=-11
r=0 c=0 pos=0 cur_pos=7 i=7 bitmask=0x81 D[i=7][0]=-1 D[i=7][1]=1 new_pos=-10
r=0 c=0 pos=0 cur_pos=8 i=7 bitmask=0x81 D[i=7][0]=-1 D[i=7][1]=1 new_pos=-9
r=0 c=0 pos=0 cur_pos=9 i=7 bitmask=0x81 D[i=7][0]=-1 D[i=7][1]=1 new_pos=-8
r=0 c=0 pos=0 cur_pos=10 i=7 bitmask=0x81 D[i=7][0]=-1 D[i=7][1]=1 new_pos=-7
r=0 c=0 pos=0 cur_pos=11 i=7 bitmask=0x83 D[i=7][0]=-1 D[i=7][1]=1 new_pos=-6
r=0 c=0 pos=0 cur_pos=12 i=7 bitmask=0x85 D[i=7][0]=-1 D[i=7][1]=1 new_pos=-5
r=0 c=0 pos=0 cur_pos=13 i=7 bitmask=0x85 D[i=7][0]=-1 D[i=7][1]=1 new_pos=-4
r=0 c=0 pos=0 cur_pos=14 i=7 bitmask=0x85 D[i=7][0]=-1 D[i=7][1]=1 new_pos=-3
r=0 c=0 pos=0 cur_pos=15 i=7 bitmask=0x85 D[i=7][0]=-1 D[i=7][1]=1 new_pos=-2
r=0 c=0 pos=0 cur_pos=16 i=7 bitmask=0x85 D[i=7][0]=-1 D[i=7][1]=1 new_pos=-1
from depixelize.
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from depixelize.