XmDestroyPixmap(library call) XmDestroyPixmap(library call)
NAME
XmDestroyPixmap -- A pixmap caching function that removes a pixmap from the pixmap cache
SYNOPSIS
#include <Xm/Xm.h>
Boolean XmDestroyPixmap(
Screen * screen,
Pixmap pixmap);
DESCRIPTION
XmDestroyPixmap removes pixmaps that are no longer used. Pixmaps are completely freed only when there is no further reference to them.
screen Specifies the display screen for which the pixmap was requested
pixmap Specifies the pixmap to be destroyed
RETURN
Returns True when successful; returns False if there is no matching screen and pixmap in the pixmap cache.
RELATED XmInstallImage(3), XmUninstallImage(3), and XmGetPixmap(3).
XmDestroyPixmap(library call)
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XmGetPixmap(library call) XmGetPixmap(library call)
NAME
XmGetPixmap -- A pixmap caching function that generates a pixmap, stores it in a pixmap cache, and returns the pixmap
SYNOPSIS
#include <Xm/Xm.h>
Pixmap XmGetPixmap(
Screen *screen,
char *image_name,
Pixel foreground,
Pixel background);
DESCRIPTION
XmGetPixmap uses the parameter data to perform a lookup in the pixmap cache to see if a pixmap has already been generated that matches the
data. If one is found, a reference count is incremented and the pixmap is returned. Applications should use XmDestroyPixmap when the pixmap
is no longer needed.
screen Specifies the display screen on which the pixmap is to be drawn. The depth of the pixmap is the default depth for this screen.
image_name
Specifies the name of the image to be used to generate the pixmap
foreground
Combines the image with the foreground color to create the pixmap if the image referenced is a bit-per-pixel image
background
Combines the image with the background color to create the pixmap if the image referenced is a bit-per-pixel image
If a pixmap is not found, image_name is used to perform a lookup in the image cache. If an image is found, it is used to generate the
pixmap, which is then cached and returned.
If an image is not found, the image_name is used as a filename, and a search is made for an X10 or X11 bitmap file. If it is found, the
file is read, converted into an image, and cached in the image cache. The image is then used to generate a pixmap, which is cached and
returned.
If image_name has a leading slash (/), it specifies a full pathname, and XmGetPixmap opens the file as specified. Otherwise, image_name
specifies a filename. In this case, XmGetPixmap looks for the file along a search path specified by the XBMLANGPATH environment variable
or by a default search path, which varies depending on whether or not the XAPPLRESDIR environment variable is set. The default search path
contains a lot of directories. Therefore, XmGetPixmap will need a relatively long time to search through all these directories for pixmaps
and bitmaps. Applications that use a lot of pixmaps and bitmaps will probably run more quickly if XBMLANGPATH is set to a short list of
directories. In addition to X bitmap files (XBM), Motif also supports XPM (X Pixmap) file formats. The XBMLANGPATH specifies the path for
both XBM and XPM files. Refer to the XmGetPixmapByDepth reference page for further details.
The XBMLANGPATH environment variable specifies a search path for X bitmap files. It can contain the substitution field %B, where the
image_name argument to XmGetPixmap is substituted for %B. It can also contain the substitution fields accepted by XtResolvePathname. The
substitution field %T is always mapped to bitmaps, and %S is always mapped to NULL.
If XBMLANGPATH is not set but the environment variable XAPPLRESDIR is set, the following pathnames are searched:
o %B
o $XAPPLRESDIR/%L/bitmaps/%N/%B
o $XAPPLRESDIR/%l_%t/bitmaps/%N/%B
o $XAPPLRESDIR/%l/bitmaps/%N/%B
o $XAPPLRESDIR/bitmaps/%N/%B
o $XAPPLRESDIR/%L/bitmaps/%B
o $XAPPLRESDIR/%l_%t/bitmaps/%B
o $XAPPLRESDIR/%l/bitmaps/%B
o $XAPPLRESDIR/bitmaps/%B
o $HOME/bitmaps/%B
o $HOME/%B
o /usr/lib/X11/%L/bitmaps/%N/%B
o /usr/lib/X11/%l_%t/bitmaps/%N/%B
o /usr/lib/X11/%l/bitmaps/%N/%B
o /usr/lib/X11/bitmaps/%N/%B
o /usr/lib/X11/%L/bitmaps/%B
o /usr/lib/X11/%l_%t/bitmaps/%B
o /usr/lib/X11/%l/bitmaps/%B
o /usr/lib/X11/bitmaps/%B
o /usr/include/X11/bitmaps/%B
If neither XBMLANGPATH nor XAPPLRESDIR is set, the following pathnames are searched:
o %B
o $HOME/%L/bitmaps/%N/%B
o $HOME/%l_%t/bitmaps/%N/%B
o $HOME/%l/bitmaps/%N/%B
o $HOME/bitmaps/%N/%B
o $HOME/%L/bitmaps/%B
o $HOME/%l_%t/bitmaps/%B
o $HOME/%l/bitmaps/%B
o $HOME/bitmaps/%B
o $HOME/%B
o /usr/lib/X11/%L/bitmaps/%N/%B
o /usr/lib/X11/%l_%t/bitmaps/%N/%B
o /usr/lib/X11/%l/bitmaps/%N/%B
o /usr/lib/X11/bitmaps/%N/%B
o /usr/lib/X11/%L/bitmaps/%B
o /usr/lib/X11/%l_%t/bitmaps/%B
o /usr/lib/X11/%l/bitmaps/%B
o /usr/lib/X11/bitmaps/%B
o /usr/include/X11/bitmaps/%B
These paths are defaults that vendors may change. For example, a vendor may use different directories for /usr/lib/X11 and
/usr/include/X11.
The following substitutions are used in these paths:
%B The image name, from the image_name argument
%N The class name of the application
%L The display's language string. This string is influenced by XtSetLanguageProc. The default string is determined by calling set-
locale(LC_ALL, NULL).
%l_%t The language and territory component of the display's language string
%l The language component of the display's language string
The contents of the file must conform to the rules for X11 bitmap files. In other words, Motif can read any X11 conformant bitmap file.
RETURN
Returns a pixmap when successful; returns XmUNSPECIFIED_PIXMAP if the image corresponding to image_name cannot be found.
RELATED XmDestroyPixmap(3), XmGetPixmapByDepth(3), XmInstallImage(3), and XmUninstallImage(3).
XmGetPixmap(library call)