diff options
| -rw-r--r-- | converter/other/rasttopnm.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/converter/other/rasttopnm.c b/converter/other/rasttopnm.c index 679e361b..ee8b8317 100644 --- a/converter/other/rasttopnm.c +++ b/converter/other/rasttopnm.c @@ -322,6 +322,10 @@ main(int argc, const char ** const argv) { if (pr == NULL ) pm_error("unable to read in the image from the rasterfile" ); + if (cmdline.index && header.ras_maplength == 0) + pm_error("You requested to use color map indices as colors (-index), " + "but this is not a color mapped image"); + writePnm(stdout, pr, header.ras_width, header.ras_height, maxval, format, header.ras_depth, header.ras_type, grayscale, header.ras_maplength > 0, colorMap, zero, one, cmdline.index); |