2.2.3. Screen Information Macros

BlackPixelOfScreen

BlackPixelOfScreen(screen)

unsigned long XBlackPixelOfScreen(screen)
      Screen *screen;

Both return the black pixel value of the specified screen.

WhitePixelOfScreen

WhitePixelOfScreen(screen)

unsigned long XWhitePixelOfScreen(screen)
      Screen *screen;

Both return the white pixel value of the specified screen.

CellsOfScreen

CellsOfScreen(screen)

int XCellsOfScreen(screen)
      Screen *screen;

Both return the number of colormap cells in the default colormap of the specified screen.

DefaultColormapOfScreen

DefaultColormapOfScreen(screen)

Colormap XDefaultColormapOfScreen(screen)
      Screen *screen;

Both return the default colormap of the specified screen.

DefaultDepthOfScreen

DefaultDepthOfScreen(screen)

int XDefaultDepthOfScreen(screen)
      Screen *screen;

Both return the depth of the root window.

DefaultGCOfScreen

DefaultGCOfScreen(screen)

GC XDefaultGCOfScreen(screen)
      Screen *screen;

Both return a default graphics context (GC) of the specified screen, which has the same depth as the root window of the screen. The GC must never be freed.

DefaultVisualOfScreen

DefaultVisualOfScreen(screen)

Visual *XDefaultVisualOfScreen(screen)
      Screen *screen;

Both return the default visual of the specified screen. For information on visual types, see "Visual Types".

DoesBackingStore

DoesBackingStore(screen)

int XDoesBackingStore(screen)
      Screen *screen;

Both return a value indicating whether the screen supports backing stores. The value returned can be one of WhenMapped, NotUseful, or Always (see "Backing Store Attribute").

DoesSaveUnders

DoesSaveUnders(screen)

Bool XDoesSaveUnders(screen)
      Screen *screen;

Both return a Boolean value indicating whether the screen supports save unders. If True, the screen supports save unders. If False, the screen does not support save unders (see "Save Under Flag").

DisplayOfScreen

DisplayOfScreen(screen)

Display *XDisplayOfScreen(screen)
      Screen *screen;

Both return the display of the specified screen.

ScreenNumberOfScreen

The XScreenNumberOfScreen() function returns the screen index number of the specified screen.

EventMaskOfScreen

EventMaskOfScreen(screen)

long XEventMaskOfScreen(screen)
      Screen *screen;

Both return the event mask of the root window for the specified screen at connection setup time.

WidthOfScreen

WidthOfScreen(screen)

int XWidthOfScreen(screen)
      Screen *screen;

Both return the width of the specified screen in pixels.

HeightOfScreen

HeightOfScreen(screen)

int XHeightOfScreen(screen)
      Screen *screen;

Both return the height of the specified screen in pixels.

WidthMMOfScreen

WidthMMOfScreen(screen)

int XWidthMMOfScreen(screen)
      Screen *screen;

Both return the width of the specified screen in millimeters.

HeightMMOfScreen

HeightMMOfScreen(screen)

int XHeightMMOfScreen(screen)
      Screen *screen;

Both return the height of the specified screen in millimeters.

MaxCmapsOfScreen

MaxCmapsOfScreen(screen)

int XMaxCmapsOfScreen(screen)
      Screen *screen;

Both return the maximum number of installed colormaps supported by the specified screen (see "Managing Installed Colormaps").

MinCmapsOfScreen

MinCmapsOfScreen(screen)

int XMinCmapsOfScreen(screen)
      Screen *screen;

Both return the minimum number of installed colormaps supported by the specified screen (see "Managing Installed Colormaps").

PlanesOfScreen

PlanesOfScreen(screen)

int XPlanesOfScreen(screen)
      Screen *screen;

Both return the depth of the root window.

RootWindowOfScreen

RootWindowOfScreen(screen)

Window XRootWindowOfScreen(screen)
      Screen *screen;

Both return the root window of the specified screen.

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