bmp.h File Reference

Windows bitmap codec. More...

#include "tinyimg/codec/codec.h"

Go to the source code of this file.

Variables
const TinyCodec	tiny_codec_bmp
	The BMP codec.

Detailed Description

Windows bitmap codec.

Author

Gregory Mitchell (me@gm.nosp@m.itch.nosp@m.215.x.nosp@m.yz)

Version

1.0.0

Date

2026-09-01

Copyright

Copyright (c) 2026

Variable Documentation

tiny_codec_bmp

const TinyCodec tiny_codec_bmp

extern

The BMP codec.

Decodes 1, 4 and 8 bit palettes, 16 bit packed, 24 bit BGR and 32 bit BGRA, uncompressed or RLE8, in either row order. Encodes 8 bit grayscale, 24 bit BGR, or 32 bit BGRA behind a V4 header when the image carries alpha.

A 32 bit BI_RGB file with only the 40 byte header is read as opaque, because the fourth byte is padding in that layout and reading it as alpha turns a normal image transparent. Alpha is honored when a mask says it is there.

Region and scaled decode read only the rows and columns they need. RLE8 is sequential, so a region of an RLE8 file expands the index plane first.