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prevent /0 in jfif res decode

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This commit is contained in:
John Cupitt 2020-05-06 20:08:36 +01:00
parent a2cd5215f1
commit b9eddecca3
1 changed files with 3 additions and 1 deletions
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4
libvips/foreign/jpeg2vips.c
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@ -524,7 +524,9 @@ read_jpeg_header( ReadJpeg *jpeg, VipsImage *out )
/* X_density / Y_density gives the pixel aspect ratio.
* Leave xres, but adjust yres.
*/
yres = xres * cinfo->X_density / cinfo->Y_density;
if( cinfo->Y_density > 0 )
yres = xres * cinfo->X_density /
cinfo->Y_density;
break;
case 1: