XCopyArea(3) XLIB FUNCTIONS XCopyArea(3)
NAME
XCopyArea, XCopyPlane - copy areas
SYNTAX
int XCopyArea(Display *display, Drawable src, Drawable dest, GC gc, int
src_x, int src_y, unsigned int width, unsigned height, int
dest_x, int dest_y);
int XCopyPlane(Display *display, Drawable src, Drawable dest, GC gc,
int src_x, int src_y, unsigned width, unsigned height, int
dest_x, int dest_y, unsigned long plane);
ARGUMENTS
dest_x
dest_y Specify the x and y coordinates, which are relative to the
origin of the destination rectangle and specify its upper-
left corner.
display Specifies the connection to the X server.
gc Specifies the GC.
plane Specifies the bit plane. You must set exactly one bit to 1.
src
dest Specify the source and destination rectangles to be combined.
src_x
src_y Specify the x and y coordinates, which are relative to the
origin of the source rectangle and specify its upper-left
corner.
width
height Specify the width and height, which are the dimensions of
both the source and destination rectangles.
DESCRIPTION
The XCopyArea function combines the specified rectangle of src with the
specified rectangle of dest. The drawables must have the same root and
depth, or a BadMatch error results.
If regions of the source rectangle are obscured and have not been re-
tained in backing store or if regions outside the boundaries of the
source drawable are specified, those regions are not copied. Instead,
the following occurs on all corresponding destination regions that are
either visible or are retained in backing store. If the destination is
a window with a background other than None, corresponding regions of
the destination are tiled with that background (with plane-mask of all
ones and GXcopy function). Regardless of tiling or whether the desti-
nation is a window or a pixmap, if graphics-exposures is True, then
GraphicsExpose events for all corresponding destination regions are
generated. If graphics-exposures is True but no GraphicsExpose events
are generated, a NoExpose event is generated. Note that by default
graphics-exposures is True in new GCs.
This function uses these GC components: function, plane-mask, subwin-
dow-mode, graphics-exposures, clip-x-origin, clip-y-origin, and clip-
mask.
XCopyArea can generate BadDrawable, BadGC, and BadMatch errors.
The XCopyPlane function uses a single bit plane of the specified source
rectangle combined with the specified GC to modify the specified rec-
tangle of dest. The drawables must have the same root but need not
have the same depth. If the drawables do not have the same root, a
BadMatch error results. If plane does not have exactly one bit set to
1 and the value of plane is not less than %2 sup n%, where n is the
depth of src, a BadValue error results.
Effectively, XCopyPlane forms a pixmap of the same depth as the rectan-
gle of dest and with a size specified by the source region. It uses
the foreground/background pixels in the GC (foreground everywhere the
bit plane in src contains a bit set to 1, background everywhere the bit
plane in src contains a bit set to 0) and the equivalent of a CopyArea
protocol request is performed with all the same exposure semantics.
This can also be thought of as using the specified region of the source
bit plane as a stipple with a fill-style of FillOpaqueStippled for
filling a rectangular area of the destination.
This function uses these GC components: function, plane-mask, fore-
ground, background, subwindow-mode, graphics-exposures, clip-x-origin,
clip-y-origin, and clip-mask.
XCopyPlane can generate BadDrawable, BadGC, BadMatch, and BadValue er-
rors.
DIAGNOSTICS
BadDrawable
A value for a Drawable argument does not name a defined Win-
dow or Pixmap.
BadGC A value for a GContext argument does not name a defined GCon-
text.
BadMatch An InputOnly window is used as a Drawable.
BadMatch Some argument or pair of arguments has the correct type and
range but fails to match in some other way required by the
request.
BadValue 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
XClearArea(3)
Xlib - C Language X Interface
X Version 11 libX11 1.8.4 XCopyArea(3)
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