bmputil is a CLI program for processing raw RGB data where no size information is known, for example when extracting game textures. bmputil can automatically detect the width of the image represented by such header-less data streams, and write a formatted image to disk in any image format supported by ImageMagick (.png by default).
Supported input formats are High Color (15bpp/16bpp), both big- and little-endian byte orderings, True Color (24bpp), and with arbitrary color channel orderings (default: BGR).
$ ./bmputil --help
Usage: bmputil [OPTION...] input-file [output-file]
Automatically detects the image width of raw RGB data, and writes a formatted
image to a file. If the width is already known then detection can be disabled
with [-w] to just write the output image file. If only width detection is
required then writing of output file can be disabled [--detect-only].
input-file input bitmap file path
output-file output file path. File extension determines image
format [default: png]
Input options:
-b, --bpp=int bits per pixel of the input file (valid values:
15, 16, 24) [default: 15]
--big-endian 15/16bpp values are in big-endian order [default:
yes]
--little-endian 15/16bpp values are in little-endian order
[default: no]
-c, --channels=BGR|RGB|... Ordering of color channels [default: BGR]
-o, --offset=int Offset into the file of the start of RGB data
[default: 0]
Output options:
--flip-h Flip output horizontally
--flip-v Flip output vertically
-n, --detect-only Do not write output file, just detect and print
the width
Width Detection Options:
--max-width=int maximum image width. Widths up to three times this
value will still be detected, but with diminishing
accuracy [default: 640]
--min-width=int minimum image width. [default: 16]
-w, --width=int Specify image width (disables auto-detection)
[default: auto]
-q, --quiet suppress all output
-v, --verbose display verbose output
-x, --debug write auto-correlation data to debug output file
-?, --help Give this help list
--usage Give a short usage message
-V, --version Print program version
Mandatory or optional arguments to long options are also mandatory or optional
for any corresponding short options.
Building from source is tested under Linux and Cygwin. Building under WSL, MSYS or any other Unix-likes is possible but not tested.
You will need the development files for ImageMagick MagickCore version 6.x.
For example on Debian/Ubuntu:
sudo apt install libmagickcore-dev
Under Cygwin install the following packages (in addition to binutils, gcc, make etc.):
* pkg-config
* libargp
* libargp-devel
* libMagickCore6_6
* libMagick-devel (6.x)
ImageMagick v6.x packages for other platforms can be found here: https://legacy.imagemagick.org/script/download.php
If you are building on a system which does not provide libargp then you will need to build and install it from: https://github.com/alexreg/libargp . When building argp from these sources, you should first run the ./update-source script to fetch the latest gnulib sources. This requires the gnulib-tool (sudo apt install gnulib).
To build bmputil simply:
$ cd bmputil
$ make
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