bmp 2 sXg

Utility for converting images from windows bmp to sXg, an advanced graphics format for ZX Spectrum (ZX Evolution/PentEvo)

Compile

FreeBSD:

gcc -o bmp2sxg -std=c99 bmp2sxg.c

Win32:

mingw32-gcc -o bmp2sxg.exe -std=c99 bmp2sxg.c

Also nice to be packed:

upx -9 bmp2sxg

Usage:

bmp2sxg <filename> [commands]

Commands:

--debug enable output debug information (default disabled)

--64 cut palette to atm 64 colors limit (default disabled)

--bg nn set background color. where nn number from palette (default #00)

sXg File Struct

0x0000 (0x04) #7f+"SXG" - 4 bytes size signature that this is an SXG file format

0x0004 (0x01) 1 byte size format version

0x0005 (0x01) 1 byte size background color (used for cleaning)

0x0006 (0x01) 1 byte size data packing type (#00 - data is not packed)

0x0007 (0x01) 1 byte size image format (1 - 16 colors, 2 - 256 color)

0x0008 (0x02) 2 byte size image width

0x000a (0x02) 2 byte size image height

(to expand the title offsets are given below)

0x000c (0x02) 2 byte size offset from current address to start of palette data

0x000e (0x02) 2 byte size offset from the current address to the start of the bitmap data

The actual beginning of the palette data

0x0010 (0x0200) 512 byte size palette

and start data bitmap

0x0210 (0xXXXX) data bitmap

Links

ZX Art (Gallery)

About sXg (Article Russian)

License

Source Copyright © 2009, 2023 Breeze\Fishbone and contributors. Distributed under the BSD License. See the file LICENCE.