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LibGfx/ILBM: Add an IFF-ILBM decoder :)

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IFF was a generic container fileformat that was popular on the Amiga
since it was the only file format supported by Deluxe Paint.

ILBM is an image format popular in the late eighties/nineties
that uses the IFF container.

This is a very first version of the decoder that only supports
(byterun) compressed files with bpp <= 8.

Only the minimal chunks are decoded: CMAP, BODY, BMHD.

I am planning to add support for the following variants:

- EHB (32 colours + lighter 32 colours)
- HAM6 / HAM8 (special mode that allowed to display the whole Amiga
4096 colours / 262 144 colours palette)
- TrueColor (24bit)

Things that could be fun to do:

- Still images could be animated using color cycle information
This commit is contained in:
Nicolas Ramz 2023-07-29 16:24:01 +02:00 • committed by Sam Atkins
parent 66d6388b8a
commit fda5590313
12 changed files with 379 additions and 2 deletions
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2
Userland/Libraries/LibGUI/FileTypeFilter.h
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@ -25,7 +25,7 @@ struct FileTypeFilter {
static FileTypeFilter image_files()
{
return FileTypeFilter { "Image Files", Vector<DeprecatedString> { "png", "gif", "bmp", "dip", "pbm", "pgm", "ppm", "ico", "jpeg", "jpg", "jxl", "dds", "qoi", "webp", "tvg" } };
return FileTypeFilter { "Image Files", Vector<DeprecatedString> { "png", "gif", "bmp", "dip", "pbm", "pgm", "ppm", "ico", "iff", "jpeg", "jpg", "jxl", "dds", "qoi", "webp", "tvg" } };
}
};