XdbeSwapBuffers(3X11X Version 11 (Release 6.XdbeSwapBuffers(3X11)
NAME
XdbeSwapBuffers - swaps front and back DBE buffers.
SYNOPSIS
#include <X11/extensions/Xdbe.h>
Status XdbeSwapBuffers(
Display *dpy,
XdbeSwapInfo *swap_info,
int num_windows)
DESCRIPTION
This function swaps the front and back buffers for a list of
windows. The argument num_windows specifies how many
windows are to have their buffers swapped; it is the number
of elements in the swap_info array. The argument swap_info
specifies the information needed per window to do the swap.
The XdbeSwapInfo structure has the following fields:
Window swap_window
XdbeSwapAction swap_action
swap_window specifies the window for which to swap buffers.
swap_action specifies the swap action to use for this
swap_window.
swap_action determines what will happen to the new back
buffer of the swap_window it is paired with in the list in
addition to making the old back buffer become visible. The
defined actions are as follows:
XdbeUndefined
The contents of the new back buffer become undefined.
This may be the most efficient action since it allows
the implementation to discard the contents of the
buffer if it needs to.
XdbeBackground
The unobscured region of the new back buffer will be
tiled with the window background. The background
action allows devices to use a fast clear capability
during a swap.
XdbeUntouched
The unobscured region of the new back buffer will be
unmodified by the swap.
XdbeCopied
The unobscured region of the new back buffer will be
the contents of the old back buffer
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XdbeSwapBuffers(3X11X Version 11 (Release 6.XdbeSwapBuffers(3X11)
ERRORS
BadMatch
A non-double-buffered window was specififed or a window
was specified twice.
BadWindow
An invalid window was specified.
BadValue
An invalid swap action was specified.
SEE ALSO
DBE, XdbeAllocateBackBufferName(), XdbeBeginIdiom(),
XdbeDeallocateBackBufferName(), XdbeEndIdiom(),
XdbeFreeVisualInfo(), XdbeGetBackBufferAttributes(),
XdbeGetVisualInfo(), XdbeQueryExtension().
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