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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, int 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 desti-
nation 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 rectan-
gle 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 retained 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 destination 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, subwindow-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 rectangle 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 rectangle 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 Fil-
lOpaqueStippled for filling a rectangular area of the destination.
This function uses these GC components: function, plane-mask, foreground, background, sub-
window-mode, graphics-exposures, clip-x-origin, clip-y-origin, and clip-mask.
XCopyPlane can generate BadDrawable, BadGC, BadMatch, and BadValue errors.
DIAGNOSTICS
BadDrawable
A value for a Drawable argument does not name a defined Window or Pixmap.
BadGC A value for a GContext argument does not name a defined GContext.
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(3X11)
Xlib - C Language X Interface
X Version 11 libX11 1.2.1 XCopyArea(3) |
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