src/hci/mucurses/colour.c

   1 #include <curses.h>
   2
   3 FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
   4
   5 struct colour_pair {
   6         short fcol;
   7         short bcol;
   8 };
   9
  10 static struct colour_pair cpairs[COLOUR_PAIRS] = {
  11         [0] = { COLOUR_WHITE, COLOUR_BLACK },
  12 };
  13
  14 /**
  15  * Identify the RGB components of a given colour value
  16  *
  17  * @v colour    colour value
  18  * @v *red      address to store red component
  19  * @v *green    address to store green component
  20  * @v *blue     address to store blue component
  21  * @ret rc      return status code
  22  */
  23 int colour_content ( short colour, short *red, short *green, short *blue ) {
  24         *red = ( ( colour & COLOUR_RED ) ? 1 : 0 );
  25         *green = ( ( colour & COLOUR_GREEN ) ? 1 : 0 );
  26         *blue = ( ( colour & COLOUR_BLUE ) ? 1 : 0 );
  27         return OK;
  28 }
  29
  30 /**
  31  * Initialise colour pair
  32  *
  33  * @v pair      colour pair number
  34  * @v fcol      foreground colour
  35  * @v bcol      background colour
  36  */
  37 int init_pair ( short pair, short fcol, short bcol ) {
  38         struct colour_pair *cpair;
  39
  40         if ( ( pair < 1 ) || ( pair >= COLOUR_PAIRS ) )
  41                 return ERR;
  42
  43         cpair = &cpairs[pair];
  44         cpair->fcol = fcol;
  45         cpair->bcol = bcol;
  46         return OK;
  47 }
  48
  49 /**
  50  * Get colours of colour pair
  51  *
  52  * @v pair      colour pair number
  53  * @ret fcol    foreground colour
  54  * @ret bcol    background colour
  55  */
  56 int pair_content ( short pair, short *fcol, short *bcol ) {
  57         struct colour_pair *cpair;
  58
  59         if ( ( pair < 0 ) || ( pair >= COLOUR_PAIRS ) )
  60                 return ERR;
  61
  62         cpair = &cpairs[pair];
  63         *fcol = cpair->fcol;
  64         *bcol = cpair->bcol;
  65         return OK;
  66 }