fl_contrast.cxx File Reference

Color contrast handling. More...

#include <FL/Fl.H>
#include <math.h>

Macros
#define	DEBUG_CONTRAST_LEGACY   0

Functions
Fl_Color	fl_contrast (Fl_Color fg, Fl_Color bg, int context, int size)
	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]

Detailed Description

Color contrast handling.

Implementation of fl_contrast() and its variants.