From: g DOT reed AT clear DOT net DOT nz (Glenn Reed)
Newsgroups: comp.os.msdos.djgpp
Subject: Proposal: Gif / Jpeg / or whatever decoder with callback
Date: Sat, 14 Feb 1998 22:34:26 GMT
Organization: CLEAR Net, http://www.clear.net.nz/
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To: djgpp AT delorie DOT com
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Hi,

Here is a proposal I have.  Just posting it here to make sure it
hasn't already been done.  I have been thinking of writing a program
(actually a C procedure) which will read in a bitmap file and using an
appropriate callback function display it on the screen.  In this way
it can be written to be graphics card independent.

I've thought of something similar to the following structure:

LoadGraphicsFile (char *filename);

DisplayGraphicsFile (char *filename, int x, int y, 
   void (*PutPixel) (int x, int y, int PaletteEntry) );

Where PutPixel is defined by the user.  These two functions should be
desigined to be ANSI compatible.  Comments?


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