Difference between revisions of "GSD"
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VonHalenbach (talk | contribs) (Start of reverse engeneering of GSD-file format! Help me!) |
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== The GSD binary file format == | == The GSD binary file format == | ||
This is my first try to reverse engineer a binary file format. If you like, you could add your thoughts! | This is my first try to reverse engineer a binary file format. If you like, you could add your thoughts! | ||
By comparison between different files with the extention .gsd i try to see what data is stored where. It has some parts in ansi-text and the most parts are just binary numbers of different length. As identification, the file starts with the text "GRAPHTEC PRT&CUT". The next line at offset 0000:0010 starts with binary numbers "03 00 00 00 02 00 00 00 00 00 00 00 00 00 00 00" (I don't know if they make any sense there). | |||
* From offset 0000:0080 to offset 0000:00cf is unknown binary data. | |||
* From offset 0000:00d3 to offset 0000:00de is binary data, which is exactly repeated from offset 0000:00fb to 0000:0107. It starts with the hex numbers 40 6a 40 which seems to be a marker for file seek. It ends with 40 00 04. Inbetween those bytes is data which funktion is still unknown. | |||
* Every object can have a different color in the 8bit-RGB-color-range. E.g. RGB(255,255,255), but most probably it is usually only black. RGB(0,0,0) | |||
Revision as of 12:28, 1 July 2008
The GSD binary file format
This is my first try to reverse engineer a binary file format. If you like, you could add your thoughts! By comparison between different files with the extention .gsd i try to see what data is stored where. It has some parts in ansi-text and the most parts are just binary numbers of different length. As identification, the file starts with the text "GRAPHTEC PRT&CUT". The next line at offset 0000:0010 starts with binary numbers "03 00 00 00 02 00 00 00 00 00 00 00 00 00 00 00" (I don't know if they make any sense there).
- From offset 0000:0080 to offset 0000:00cf is unknown binary data.
- From offset 0000:00d3 to offset 0000:00de is binary data, which is exactly repeated from offset 0000:00fb to 0000:0107. It starts with the hex numbers 40 6a 40 which seems to be a marker for file seek. It ends with 40 00 04. Inbetween those bytes is data which funktion is still unknown.
- Every object can have a different color in the 8bit-RGB-color-range. E.g. RGB(255,255,255), but most probably it is usually only black. RGB(0,0,0)