XSetClipOrigin(3X11) XSetClipOrigin(3X11)
NAME
XSetClipOrigin, XSetClipMask, XSetClipRectangles - GC convenience routines
SYNOPSIS
XSetClipOrigin(display, gc, clip_x_origin, clip_y_origin)
Display *display;
GC gc;
int clip_x_origin, clip_y_origin;
XSetClipMask(display, gc, pixmap)
Display *display;
GC gc;
Pixmap pixmap;
XSetClipRectangles(display, gc, clip_x_origin, clip_y_origin, rectangles, n, ordering)
Display *display;
GC gc;
int clip_x_origin, clip_y_origin;
XRectangle rectangles[];
int n;
int ordering;
ARGUMENTS
Specifies the connection to the X server. Specify the x and y coordinates of the clip-mask origin. Specifies the GC. Specifies the num-
ber of rectangles. Specifies the ordering relations on the rectangles. You can pass Unsorted, YSorted, YXSorted, or YXBanded. Specifies
the pixmap or None. Specifies an array of rectangles that define the clip-mask.
DESCRIPTION
The XSetClipOrigin function sets the clip origin in the specified GC. The clip-mask origin is interpreted relative to the origin of what-
ever destination drawable is specified in the graphics request.
XSetClipOrigin can generate BadAlloc and BadGC errors.
The XSetClipMask function sets the clip-mask in the specified GC to the specified pixmap. If the clip-mask is set to None, the pixels are
always drawn (regardless of the clip-origin).
XSetClipMask can generate BadAlloc, BadGC, BadMatch, and BadValue errors.
The XSetClipRectangles function changes the clip-mask in the specified GC to the specified list of rectangles and sets the clip origin. The
output is clipped to remain contained within the rectangles. The clip-origin is interpreted relative to the origin of whatever destination
drawable is specified in a graphics request. The rectangle coordinates are interpreted relative to the clip-origin. The rectangles should
be nonintersecting, or the graphics results will be undefined. Note that the list of rectangles can be empty, which effectively disables
output. This is the opposite of passing None as the clip-mask in XCreateGC, XChangeGC, and XSetClipMask.
If known by the client, ordering relations on the rectangles can be specified with the ordering argument. This may provide faster operation
by the server. If an incorrect ordering is specified, the X server may generate a BadMatch error, but it is not required to do so. If no
error is generated, the graphics results are undefined. Unsorted means the rectangles are in arbitrary order. YSorted means that the rec-
tangles are nondecreasing in their Y origin. YXSorted additionally constrains YSorted order in that all rectangles with an equal Y origin
are nondecreasing in their X origin. YXBanded additionally constrains YXSorted by requiring that, for every possible Y scanline, all rec-
tangles that include that scanline have an identical Y origins and Y extents.
XSetClipRectangles can generate BadAlloc, BadGC, BadMatch, and BadValue errors.
DIAGNOSTICS
The server failed to allocate the requested resource or server memory. A value for a GContext argument does not name a defined GContext.
Some argument or pair of arguments has the correct type and range but fails to match in some other way required by the request. Some
numeric value falls outside the range of values accepted by the request. Unless a specific range is specified for an argument, the full
range defined by the argument's type is accepted. Any argument defined as a set of alternatives can generate this error.
SEE ALSO
XCreateGC(3X11), XDrawRectangle(3X11), XQueryBestSize(3X11), XSetArcMode(3X11), XSetFillStyle(3X11), XSetFont(3X11), XSetLineAt-
tributes(3X11), XSetState(3X11), XSetTile(3X11)
Xlib -- C Language X Interface
XSetClipOrigin(3X11)