FLTK 1.4.0
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Color contrast handling. More...
Functions | |
Fl_Color | fl_contrast (Fl_Color fg, Fl_Color bg, Fl_Fontsize fs, int context) |
Returns a color that contrasts with the background color. | |
void | fl_contrast_function (Fl_Contrast_Function *f) |
Register a custom contrast function. | |
int | fl_contrast_level () |
Get the contrast level (sensitivity) of the fl_contrast() method. | |
void | fl_contrast_level (int level) |
Set the contrast level (sensitivity) of the fl_contrast() method. | |
int | fl_contrast_mode () |
Return the current contrast algorithm (mode). | |
void | fl_contrast_mode (int mode) |
Set the contrast algorithm (mode). | |
double | fl_lightness (Fl_Color color) |
Return the perceived lightness of a color. | |
double | fl_luminance (Fl_Color color) |
Return the raw / physical luminance of a color. | |
unsigned | get_color (Fl_Color i) |
Variables | |
unsigned | fl_cmap [256] |
Color contrast handling.
Implementation of fl_contrast() and its variants.