Amiga Unix — 68040 · 68060

Manual pages › X Window and screen libraries (3X)

XInterReg(3X)

region arthmetic

From the original Amiga UNIX 2.1 manual. Some things it mentions may not be in this release.

NAME

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

SYNTAX

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

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

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

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

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

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

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

ARGUMENTS

dest_region_return

Returns the destination region.

dr_return Returns the result of the computation.

dx
dy        Specify the x and y coordinates, which define the
          amount you want to move or shrink 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

XWIN 3.0               Last change: 9/1/88                 .ie t

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

XWIN 3.0               Last change: 9/1/88                 .ie t

XWIN 3.0               Last change: 9/1/88                 .ie t