From: fano AT norcov DOT com (Dr. Norman Fahrer)
Date: Tue, 7 Jun 1994 00:53:34 -0700
To: djgpp AT sun DOT soe DOT clarkson DOT edu
Subject: libgrx and bitmap


Hi,

I am using LIBGRX at the moment and try to get bitmaps converted
to pixmaps. Its almost fine. But some vertical lines (columns) get
interchanged. I do it as follows :

1. Make a bitmap on a SUN sparc :   bitmap test 64x64
   There I 'draw' a bitmap and save it.

2. Then I use this bitmap on a PC as input to the djgpp adapted 
   LIBGRX :

  static char test[] = { 0x00,0x00 <etc.....>   
  GrPattern *pp
  pp = GrBuildPixmapFromBits(test,64,64,GrBlack(),GrWhite());
  GrPatternFilledBox(300,300,400,400,pp);

   If the test-bitmap was an "F" for instance, then parts of the
   vertical line in the letter "F" are moved to the left or right.
   
   I tried some variations but could not clarify this problem.
   I am really curious to know how you proceed when you want to
   get bitmaps (also with width greater than 8) onto the screen
   with the grx-library. 

   I am sure there are some professionals out there !
   Thanks for your hints in advance.

   Norman

   

-- 
Dr. Norman Fahrer