DMXChangeDesktopAttributes() resizes the bounding box of the whole screen when using the Xinerama extension. Otherwise, it has no effect on the screen layout. An attribute mask is placed in
mask and the attributes to change are placed in
attr.The values that are used to compute
mask are as follows:
DMXDesktopWidth
DMXDesktopHeight
DMXDesktopShiftX
DMXDesktopShiftY
The
DMXDesktopAttributes structure is:
typedef struct {
unsigned int width;
unsigned int height;
int shiftX;
int shiftY;
} DMXDesktopAttributes;
width and height specify the new width and height for the bounding box. shiftX and shiftY specify where the Xinerama origin will be placed with respect to the origin of the new bounding box. This allows the left and upper edges of the bounding box to be changed without changing the visual position of the windows on the desktop. If width or height is not specified, the current values will be used. If shiftX or shiftY is not specified, 0 will be used.
All coordinants are in the global DMX coordinant system. If Xinerama is not active, an error will be generated.