xtaddexposuretoregion(3xt) [xfree86 man page]

XtAddExposureToRegion(3Xt)					   XT FUNCTIONS 					XtAddExposureToRegion(3Xt)

NAME

       XtAddExposureToRegion - merge exposure events into a region

SYNTAX

       void XtAddExposureToRegion(XEvent *event, Region region);

ARGUMENTS

       event	 Specifies a pointer to the Expose or GraphicsExpose event.

       region	 Specifies the region object (as defined in <X11/Xutil.h>).

DESCRIPTION

       The XtAddExposureToRegion function computes the union of the rectangle defined by the exposure event and the specified region.  Then, it
       stores the results back in region.  If the event argument is not an Expose or GraphicsExpose event, XtAddExposureToRegion returns without
       an error and without modifying region.

       This function is used by the exposure compression mechanism (see Section 7.9.3).

SEE ALSO

       X Toolkit Intrinsics - C Language Interface
       Xlib - C Language X Interface

XFree86 							   Version 4.7.0					XtAddExposureToRegion(3Xt)

XIntersectRegion(3X11)						  XLIB FUNCTIONS					    XIntersectRegion(3X11)

NAME

       XIntersectRegion, XUnionRegion, XUnionRectWithRegion, XSubtractRegion, XXorRegion, XOffsetRegion, XShrinkRegion - region arithmetic

SYNTAX

       int XIntersectRegion(Region sra, Region srb, Region dr_return);

       int XUnionRegion(Region sra, Region srb, Region dr_return);

       int XUnionRectWithRegion(XRectangle *rectangle, Region src_region, Region dest_region_return);

       int XSubtractRegion(Region sra, Region srb, Region dr_return);

       int XXorRegion(Region sra, Region srb, Region dr_return);

       int XOffsetRegion(Region r, int dx, int dy);

       int XShrinkRegion(Region r, int dx, int dy);

ARGUMENTS

       dest_region_return
		 Returns the destination region.

       dr_return Returns the result of the computation.  ds Dy move or shrink

       dx
       dy	 Specify the x and y coordinates, which define the amount you want to  the specified region.

       r	 Specifies the region.

       rectangle Specifies the rectangle.

       sra
       srb	 Specify the two regions with which you want to perform the computation.

       src_region
		 Specifies the source region to be used.

DESCRIPTION

       The XIntersectRegion function computes the intersection of two regions.

       The XUnionRegion function computes the union of two regions.

       The XUnionRectWithRegion function updates the destination region from a union of the specified rectangle and the specified source region.

       The XSubtractRegion function subtracts srb from sra and stores the results in dr_return.

       The XXorRegion function calculates the difference between the union and intersection of two regions.

       The XOffsetRegion function moves the specified region by a specified amount.

       The XShrinkRegion function reduces the specified region by a specified amount.  Positive values shrink the size of the region, and negative
       values expand the region.

SEE ALSO

       XCreateRegion(3X11), XDrawRectangle(3X11), XEmptyRegion(3X11)
       Xlib - C Language X Interface

XFree86 							   Version 4.7.0					    XIntersectRegion(3X11)