modeco80 753b879e7b *: Add Markdown file documentation to //datadoc

:) Finally. Might as well.

2025-01-20 00:03:48 -05:00

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Europa PS2 Texture File (.tex)

On PS2, the Europa engine uses a homebrew texture format, known as "YATF" or, ~~probably~~ definitely Yet Another Texture Format. Glad to know this team had some humour to them.

Versions

Version	Details
1	Introduced in Starfighter.
2	Introduced in Jedi Starfighter. Breaks the FourCC magic and adds a 4bpp mode while jumbling all the other modes.

Header

The .tex file header is one of the few filetypes in Europa which uses a proper FourCC magic. However this becomes rapidly annoying as you'll see later.

struct yatfHeader {
    uint32_t magic;
    uint16_t version;
    Format format; // Version-specific
    uint8_t unknown; // ?
    uint32_t unknownZeroed; // Zeroed on all files

    uint32_t width;
    uint32_t height;
};

Version 1

Version 1 writes its magic (in LE) as FTAY.

Version 1 formats are:

Int	Format type
0	8bpp CLUT (256 colors)
2	24bpp direct color
3	32bpp RGBA8888

Version 2

Version 2 writes its magic (in LE) as YATF. I have no clue why they did this because it pretty much means they broke the format anyways.

Version 2 formats are:

Int	Format type
1	8bpp CLUT (256 colors)
3	24bpp direct color
4	32bpp RGBA8888
5	4bpp CLUT (16 colors)

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