GetGray

Get best available intermediate color

#include <Palettes.h> Color QuickDraw

Boolean GetGray( device, backGround, foreGround);

GDHandle device; a handle to the device

const RGBColor *backGround background color

RGBColor *foreGround foreground color

The GetGray function provides your application with the best intermediate

color in RGB space that is available for a given device

device handle to the graphics device

backGround the background color for which you want the best intermediate RGB

color

foreGround the foreground color for which you want the best intermediate RGB

color

Notes: One use for GetGray is to return the best gray, as when dimming a menu

item: supply black and white as the two colors, and GetGray returns the best

available gray that lies between them.

If no gray is available (or, if you supplied two colors, no distinguishable

third color is available), the foreGround parameter is un changed, and the

function returns FALSE. If at least one gray or intermediate color is

available, it or the best one is stored in the foreGround parameter, and the

function returns TRUE.

Referenced by (1):