DeskPic

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File Format
Name DeskPic
Ontology
Extension(s) .gfb

DeskPic is a graphics program for the Atari line of computers.

Contents

Identification

.gfb files begin with ASCII "GF25".

Format

The GFB image format:
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It is a format that I use for the program GemFrac had once developed.
The following data can be found in this image format:
   4 bytes identifier (GF25 in this version)
   4 bytes number of colors.
   4 bytes width of the screen
   4 bytes height of the screen
   4 bytes size of the buffer to be allocated for the screen
     n bytes of graphic data, where n = ((image width + 7) / 8) * image height * planes,
     which corresponds to the largest allocated buffer.
768 bytes color table => max. 256 colors.

Software

Sample files

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