From b2941c9345606afc6abd7032353038040e541620 Mon Sep 17 00:00:00 2001 From: giraffedata Date: Fri, 31 Dec 2021 01:15:45 +0000 Subject: Fix bogus 'sample value exceeds maxval' failure git-svn-id: http://svn.code.sf.net/p/netpbm/code/trunk@4229 9d0c8265-081b-0410-96cb-a4ca84ce46f8 --- other/pamendian.c | 18 +++++++++++++++--- 1 file changed, 15 insertions(+), 3 deletions(-) (limited to 'other') diff --git a/other/pamendian.c b/other/pamendian.c index 3d194a26..8826b06f 100644 --- a/other/pamendian.c +++ b/other/pamendian.c @@ -47,18 +47,30 @@ int main(int argc, const char ** argv) { pnm_writepaminit(&outpam); + /* We read the samples as if the maxval is 65535 so pnm_readpamrow, which + assumes big-endian samples, doesn't choke on a little-endian sample, + finding it to exceed the maxval. (The pure way to do this would be not + to use libnetpbm row reading and writing facilities on little-endian + pseudo-Netpbm images, but this program isn't important enough to + justify that effort). + */ + inpam.maxval = 65535; + intuplerow = pnm_allocpamrow(&inpam); outtuplerow = pnm_allocpamrow(&outpam); - for (row = 0; row < inpam.height; row++) { + for (row = 0; row < inpam.height; ++row) { unsigned int col; + pnm_readpamrow(&inpam, intuplerow); - for (col = 0; col < inpam.width; col++) { + for (col = 0; col < inpam.width; ++col) { unsigned int plane; - for (plane = 0; plane < inpam.depth; plane++) + + for (plane = 0; plane < inpam.depth; ++plane) { outtuplerow[col][plane] = reverseSample(intuplerow[col][plane], inpam.bytes_per_sample); + } } pnm_writepamrow(&outpam, outtuplerow); } -- cgit 1.4.1