XCopyPlane

Syntax

XCopyPlane(display, src, dest, gc, src_x, src_y, width, height, dest_x, dest_y, plane)
      Display *display;
      Drawable src, dest;
      GC gc;
      int src_x, src_y;
      unsigned int width, height;
      int dest_x, dest_y;
      unsigned long plane;

Arguments

display Specifies the connection to the X server.
src dest Specify the source and destination rectangles to be combined.
gc Specifies the GC.
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.
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.
plane Specifies the bit plane. You must set exactly one bit to 1.

Description

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 FillOpaqueStippled for filling a rectangular area of the destination.

This function uses these GC components: function, plane-mask, foreground, background, subwindow-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

XCopyArea(), XClearArea(), "Copying Areas".
Christophe Tronche, ch@tronche.com