fixup_datafile(3alleg4)          Allegro manual          fixup_datafile(3alleg4)

       fixup_datafile - Fixes truecolor images in compiled datafiles. Allegro
       game programming library.

       #include <allegro.h>

       void fixup_datafile(DATAFILE *data);

       If you are using compiled datafiles (produced by the dat2s and dat2c
       utilities) on a platform that doesn't support constructors (currently any
       non GCC-based platform), or if the datafiles contain truecolor images,
       you must call this function once after your set the video mode that you
       will be using. This will ensure the datafiles are properly initialised in
       the first case and convert the color values into the appropriate format
       in the second case. It handles flipping between RGB and BGR formats, and
       converting between different color depths whenever that can be done
       without changing the size of the image (ie. changing 15<->16-bit hicolor
       for both bitmaps and RLE sprites, and 24<->32-bit truecolor for RLE

       Note that you can only call this once and expect it to work correctly,
       because after the call the DATAFILE you fixed up is permanently converted
       to whatever is the current component ordering for your screen mode. If
       you call fixup_datafile again, the function assumes you have a freshly
       loaded datafile. It cannot "undo" the previous conversion.

       If your program supports changing resolution and/or color depth during
       runtime, you have two choices: either call fixup_datafile() just once and
       hope that the component ordering and bit depth doesn't change when the
       screen mode changes (unlikely). Or, you can reload your datafiles when
       the screen mode changes.

       set_gfx_mode(3alleg4), set_color_conversion(3alleg4)

Allegro                           version 4.4.3          fixup_datafile(3alleg4)