XPolygonRegion(3X11) MIT X11R4 XPolygonRegion(3X11)Name
XPolygonRegion, XClipBox - generate regions
Syntax
Region XPolygonRegion(points, n, fill_rule)
XPoint points[];
int n;
int fill_rule;
XClipBox(r, rect_return)
Region r;
XRectangle *rect_return;
Arguments
fill_rule Specifies the fill-rule you want to set for the specified GC. You can pass or
n Specifies the number of points in the polygon.
points Specifies an array of points.
r Specifies the region.
rect_return
Returns the smallest enclosing rectangle.
Description
The function returns a region for the polygon defined by the points array. For an explanation of fill_rule, see
The function returns the smallest rectangle enclosing the specified region.
See AlsoXCreateGC(3X11), XDrawPoint(3X11), XDrawRectangle(3X11)
X Window System: The Complete Reference, Second Edition, Robert W. Scheifler and James Gettys
XPolygonRegion(3X11)
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XIntersectRegion(3X11) MIT X11R4 XIntersectRegion(3X11)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. 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 function computes the intersection of two regions.
The function computes the union of two regions.
The function updates the destination region from a union of the specified rectangle and the specified source region.
The function subtracts srb from sra and stores the results in dr_return.
The function calculates the difference between the union and intersection of two regions.
The function moves the specified region by a specified amount.
The function reduces the specified region by a specified amount. Positive values shrink the size of the region, and negative values expand
the region.
See AlsoXCreateRegion(3X11), XDrawRectangle(3X11), XEmptyRegion(3X11)
X Window System: The Complete Reference, Second Edition, Robert W. Scheifler and James Gettys
XIntersectRegion(3X11)
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