[Coco] P-3

[Robert Gault]

Roger Taylor wrote:

> Speaking of my Projector-3 viewer. Somewhere in time over the past 4 
> years, the GIF driver apparently developed a bug in the Encoder 
> routines.  Can someone please  confirm this to be true or not?  Someone 
> reported that GIF images were being created that couldn't be viewed.
> 
> P-3 always rendered and created GIF87A and GIF89A fine so I'm not sure 
> what has happened, but I want to fix it.
> 

These comments are based on the source included with RainbowIDE.

The apple.gif included with the project is a good 89a gif file and loads 
into P3 or any other viewer. All attempts to save this file from P3 
using Create and Save result in an "87a" image. I can't find a way to 
force the save or maybe create to use the 89a format.

The saved image can't be opened with any other than P3. The format is 
indicated as not valid. Examination of the raw file shows that the name 
is GIF87A which is not correct. It should be GIF87a and when changed, 
the image can be opened in some but not all viewers. WinXP Picture and 
Fax Viewer won't open it Mozilla, LView and Paint Shop Pro will.

Additionally using Paint Shop Pro, the new 87a image is not the correct 
size. What started as 214x199x256 has become 320x200x16. Since I did not 
check the P3 source code, I don't know how much of this is intentional. 
Perhaps the decrease in color count is required but I'd think the size 
should not be changed.