workbench/libs/icon/changetoselectediconcolor.c

   1 /*
   2     Copyright © 1995-2007, The AROS Development Team. All rights reserved.
   3     $Id$
   4 */
   5
   6 #include "icon_intern.h"
   7
   8 #define EFFECT_NONE      (0)
   9 #define EFFECT_LIGHTEN   (1)
  10 #define EFFECT_TINT_BLUE (2)
  11 #define EFFECT_XOR       (3)
  12
  13 #define EFFECT EFFECT_LIGHTEN
  14
  15 /*****************************************************************************
  16
  17     NAME */
  18
  19     AROS_LH1(VOID, ChangeToSelectedIconColor,
  20
  21 /*  SYNOPSIS */
  22         AROS_LHA(struct ColorRegister *, cr, A0),
  23
  24 /*  LOCATION */
  25         struct Library *, IconBase, 33, Icon)
  26
  27 /*  FUNCTION
  28         Change a color register for selected icon state.
  29
  30     INPUTS
  31         cr - colorregister to be changed.
  32
  33     RESULT
  34
  35     NOTES
  36
  37     EXAMPLE
  38
  39     BUGS
  40
  41     SEE ALSO
  42
  43     INTERNALS
  44
  45 *****************************************************************************/
  46 {
  47     AROS_LIBFUNC_INIT
  48
  49 #if EFFECT == EFFECT_LIGHTEN
  50     cr->red   = (cr->red   >> 1) + (0xFF >> 1);
  51     cr->green = (cr->green >> 1) + (0xFF >> 1);
  52     cr->blue  = (cr->blue  >> 1) + (0xFF >> 1);
  53 #elif EFFECT == EFFECT_TINT_BLUE
  54     cr->red   = (cr->red   >> 1);
  55     cr->green = (cr->green >> 1);
  56     cr->blue  = (cr->blue  >> 1) + (0xFF >> 2);
  57 #elif EFFECT == EFFECT_XOR
  58     cr->red   = cr->red   ^ 0xFF;
  59     cr->green = cr->green ^ 0xFF;
  60     cr->blue  = cr->blue  ^ 0xFF;
  61 #endif
  62
  63     AROS_LIBFUNC_EXIT
  64 } /* ChangeToSelectedIconColor() */