Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!cornell!batcomputer!itsgw!steinmetz!uunet!jvc!jonathan
From: jonathan@jvc.UUCP (Jonathan Hue)
Newsgroups: comp.graphics
Subject: Re: Image Conversion 8bits to 1
Summary: bug fix (already, sigh...)
Message-ID: <314@jvc.UUCP>
Date: 17 Feb 89 00:35:37 GMT
References: <1747@quanta.eng.ohio-state.edu> <313@jvc.UUCP>
Organization: JVC Laboratory of America
Lines: 29


I screwed up.  A lot of raster file loaders pay attention to ras_maplength
even when ras_maptype is RMT_NONE.  It should always be 0 for these 1-bit
images, so here's a patch.  The program as distributed uses the maplength
of the original.  The bug only shows up when your original has a colormap.
Sorry for the inconvenience.


*** bw.dist	Thu Feb 16 16:19:40 1989
--- bw.c	Thu Feb 16 16:24:52 1989
***************
*** 90,96 ****
      outheader.ras_type = RT_STANDARD;
      outheader.ras_maptype = RMT_NONE;
      outheader.ras_length = outlinebytes * outheader.ras_height;
!     
      
      pr_dump_header(stdout, &outheader, (colormap_t *) NULL);
      
--- 90,96 ----
      outheader.ras_type = RT_STANDARD;
      outheader.ras_maptype = RMT_NONE;
      outheader.ras_length = outlinebytes * outheader.ras_height;
!     outheader.ras_maplength = 0;		/* no color map */    
      
      pr_dump_header(stdout, &outheader, (colormap_t *) NULL);
      

-Jonathan	uunet!jvc!jonathan