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fli_pal_dirty_from(3)           Allegro manual           fli_pal_dirty_from(3)

NAME
       fli_pal_dirty_from, fli_pal_dirty_to - Indicate which parts of the
       palette have changed. Allegro game programming library.

SYNOPSIS
       #include <allegro.h>

       extern int fli_pal_dirty_from;

       extern int fli_pal_dirty_to;

DESCRIPTION
       These variables are set by next_fli_frame() to indicate which part of
       the fli_palette has changed since the last call to
       reset_fli_variables(). If fli_pal_dirty_from is greater than
       fli_pal_dirty_to, the palette has not changed, otherwise colors
       fli_pal_dirty_from to fli_pal_dirty_to (inclusive) have altered. You
       can use these when updating the hardware palette, to avoid unnecessary
       calls to set_palette(). Example:

          if (fli_pal_dirty_from <= fli_pal_dirty_to)
             set_palette_range(fli_palette, fli_pal_dirty_from,
                               fli_pal_dirty_to, 1);

SEE ALSO
       fli_palette(3), reset_fli_variables(3)

Allegro                          version 4.4.2           fli_pal_dirty_from(3)