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tehsausage/eo2gfx
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Building:
Dependencies:
libpng
Steps:
$ cmake .
$ make
Setup:
Step 1:
$ mkdir atlas2 atlas2/gfx atlas2/gfxdupe dump atlastmp
Step 2:
Make a sub-folder called "gfx" which contains all EO EGF
files.
Usage:
Dependencies:
PHP
imagemagick
pngcrush
Step 1:
$ ./gfx_dumper.php
Dumps EGF files from ./gfx to ./dump, saving each
image to a separate PNG file:
./dump/gfx###.egf/####.png
Approx. 15.5k files created.
Step 2:
$ ./atlas_maker.php:
Takes dumped files from ./gfx and packs them in to vertically
aligned atlasses as specified by the hard-coded rules (starting
at approx line 300) and dumps packed images to:
./atlas2/gfx/################.png (#s represent an 8 byte
hash of the image content)
referenced by graphics table files:
./atlas2/gfx###.table
which are a binary format describing the positions
of the images in each atlas (E2GT format).
Exact duplicate image files are dumped to
./atlas2/gfxdupe
and can be ignored.
Intermediate files are generated in:
./atlastmp
and can be ignored.
Approx. 7k temp files created.
Approx. 2.4k atlas files created (25 tables + ~2.3k images)
Step 3:
$ ./fix_alpha.php
Fixes the transparency of a few atlas images for some reason.
Probably important.
Hard-coded list of atlas image hashes used.
E2GT Format:
All multi-byte numbers are big endian I think maybe
Header:
[4] Magic bytes ("E2GT" ASCII)
[2] Version number (0x0001)
[2] Number of images
Body:
( repeated for every image from 1 .. Number of images inclusive )
{
[8] Hash code corresponding to the gfx image filename
(e.g. 0x123456789ABCDEF refers to gfx/0123456789abcdef.png)
[2] Image number
[2] X offset of image in atlas
[2] Width of image
[2] Height of image
}
E2GTv2 Format:
Header:
[4] Magic bytes: ("E2GT" ASCII)
[2] Version number (0x0002)
[2] Number of hash codes
[2] Number of images
Body1:
( repeated for every unique hash code in the file )
{
[8] Hash code corresponding to the gfx image filename
(e.g. 0x
}
Body2:
( repeated for every image from 1 .. Number of images inclusive )
{
[8] Hash code corresponding to the gfx image filename
(e.g. 0x123456789ABCDEF refers to gfx/0123456789abcdef.png)
[2] Image number
[2] X offset of image in atlas
[2] Width of image
[2] Height of image
[1] X adjust of image
[1] Y adjust of image
[1] X extend of image
[1] Y extend of image
}
E2SS Format:
Header:
[4] Magic bytes: ("E2SS" ASCII)
[2] Version number (0x0001)
[2] Number of sprite sheets
Body:
( repeated for each sprite sheet )
{
[2] Number of graphics
( repeated for each graphic in sheet)
{
[2] Y offset
}
}
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EO Graphics Dumper
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