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resample: fix XRGB32 color channel handling

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This commit is contained in:
cinap_lenrek 2013-08-12 19:28:10 +02:00
parent 1b58ec9279
commit df9597ecde
1 changed files with 7 additions and 8 deletions
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15
sys/src/cmd/resample.c
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@ -133,7 +133,7 @@ max(int a, int b)
Memimage*
resample(int xsize, int ysize, Memimage *m)
{
int i, j, bpl, nchan;
int i, j, d, bpl, nchan;
Memimage *new;
uchar **oscan, **nscan;
@ -166,13 +166,12 @@ resample(int xsize, int ysize, Memimage *m)
}
/* resample in X */
nchan = m->depth/8;
nchan = d = m->depth/8;
if(m->chan == XRGB32)
nchan--;
for(i=0; i<Dy(m->r); i++){
for(j=0; j<nchan; j++){
if(j==0 && m->chan==XRGB32)
continue;
resamplex(oscan[i], j, nchan, Dx(m->r), nscan[i], xsize);
}
for(j=0; j<nchan; j++)
resamplex(oscan[i], j, d, Dx(m->r), nscan[i], xsize);
free(oscan[i]);
oscan[i] = nscan[i];
nscan[i] = malloc(bpl);
@ -183,7 +182,7 @@ resample(int xsize, int ysize, Memimage *m)
/* resample in Y */
for(i=0; i<xsize; i++)
for(j=0; j<nchan; j++)
resampley(oscan, nchan*i+j, Dy(m->r), nscan, ysize);
resampley(oscan, d*i+j, Dy(m->r), nscan, ysize);
/* pack data into destination */
bpl = bytesperline(new->r, m->depth);