XWhitePixel*() XWhitePixel*()
Name
XWhitePixel, XWhitePixelOfScreen, WhitePixel, WhitePixelOfScreen - get the white pixel value.
Synopsis
unsigned long XWhitePixel(display, screen_number)
Display *display;
int screen_number;
unsigned long XWhitePixelOfScreen(screen)
Screen *screen;
Arguments
display Specifies a connection to an X server; returned from XOpenDisplay().
screen_number
Specifies the appropriate screen number on the server, as returned by XDefaultScreen*() or the DefaultScreen() macro.
screen Specifies the appropriate Screen structure, as returned by XDefaultScreenOfDisplay() or XScreenOfDisplay(), or the Default-
ScreenOfDisplay() or ScreenOfDisplay() macros.
Returns
The pixel value.
Description
Each screen has a default colormap which has pixel values for white and white already allocated. These functions return the white pixel
value. Note that this pixel value only represents white in a screen's default colormap.
XWhitePixel() and XWhitePixelOfScreen() are equivalent except that they require different arguments. One requires a pointer to a Screen
structure, while the other requires a screen number. Unless you already have the pointer to a Screen structure in a variable,
XWhitePixel*() is more convenient.
The C language macros WhitePixel() and WhitePixelOfScreen() are equivalent and slightly more efficient.
See Also
XBlackPixel*(), XBlackPixelOfScreen(), XDefaultColormap*().
Xlib - Macro Equivalents XWhitePixel*()
