Manifest:

	ReadMe		- This File



	MyGif.c		- main prog for my GIF viewer

	Decoder.c	- GIF image-data decoder (not my code)

	Errs.h, Std.h	- header files that came with decoder.c



	gifcompr.c 	- Use these together to build a GIF encoder.

	gifencod.c	- 





The C code came from Tom Friedel's Public Access Unix BBS, thanks Tom!



	Tom Friedel             Public Access Unix BBS

	tpf@prism.gatech.edu    ...gatech!emory!jdyx!tpf          

	(404) 320-7624          (404) 321-5020                  





MyGif

-----



This is my simple GIF viewer, it can decode and display GIF images,

but does NOT load the color palette.  It is also very slow.  Compile

it with msc 5.0, and type 'mygif (gif file)'.  Should work fine except

for the colors (see (1) below).



Some ideas for fixing it up:



	(1) Palette loading

		since my version was going to be used with my frame-grabber

		board (800x600 256color GIFs are nice), I didn't write the

		code to load the palette on the ega/vga/cga systems.  The

		LoadPalette() function in MyGif.c should be written for your

		system, it is empty for now.



	(2) Speed

		Changing the get_byte() function to use buffered i/o speeds

		up the program immensely - sort of the same buffering used 

		by fread/fprintf/fscanf.

		Try reading in chunks of 16k-32k at a time from a file, and

		you will see what I mean.  



	(3) Auto video-mode select

		Program should set the video mode according to the size of

		the image.  For example, a 16 color 320x200 GIF should be

		displayed in 16clr, 320x200 mode, not in 16clr 640x400 mode.



	(4) Menu selection of GIF to display

		Throw up a menu of all available GIFs, allow user to pick

		the desired GIF with mouse and/or arrow-keys.  Would be 

		nice if the current GIF's stats were displayed as we browse

		through them.



I don't intend to do too much more with this program, I could probably

help you with (1) and (2) above, the rest takes more time, and I want 

to work on my GIF encoder.



The file MyGif.c is hereby released by me - Simon Gales - to the public

domain.  Hack it up as you see fit, even sell it if you can get someone 

to buy it.  No restrictions whatsoever on MyGif.c.



Note that my program uses Decoder.c, which is not my code, so see that

file or contact the author concerning what you can/can't do with it.



To compile MyGif, use Microsoft C version 5.0 (others may work), and

say: 'cl mygif.c decoder.c' to produce mygif.exe.



To port to other systems: rewrite get_byte(), output_line(), and 

LoadPalette() in MyGif.c, figure out how to compile yourself :->>.