XmGetPixmapByDepth - A pixmap caching function that generates a pixmap, stores it in a pixmap cache, and returns the pixmap
#include <Xm/Xm.h> Pixmap XmGetPixmapByDepth (screen, image_name,foreground, background, depth) Screen *screen; char *image_name; Pixel foreground; Pixel background; int depth;
XmGetPixmapByDepth 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.
If a matching 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, 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 XmGetPixmapByDepth
opens the file as specified. Otherwise, image_name specifies
a filename. In this case XmGetPixmapByDepth 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 XBMLANGPATH
environment variable specifies a
search path for X bitmap files. It can contain the substitution field
%B
, where the image_name argument to
XmGetPixmapByDepth 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:
%B $XAPPLRESDIR/%L/bitmaps/%N/%B $XAPPLRESDIR/%l/bitmaps/%N/%B $XAPPLRESDIR/bitmaps/%N/%B $XAPPLRESDIR/%L/bitmaps/%B $XAPPLRESDIR/%l/bitmaps/%B $XAPPLRESDIR/bitmaps/%B $HOME/bitmaps/%B $HOME/%B /usr/lib/X11/%L/bitmaps/%N/%B /usr/lib/X11/%l/bitmaps/%N/%B /usr/lib/X11/bitmaps/%N/%B /usr/lib/X11/%L/bitmaps/%B /usr/lib/X11/%l/bitmaps/%B /usr/lib/X11/bitmaps/%B /usr/include/X11/bitmaps/%B
If neither XBMLANGPATH
nor XAPPLRESDIR
is
set, the following pathnames are searched:
%B $HOME/%L/bitmaps/%N/%B $HOME/%l/bitmaps/%N/%B $HOME/bitmaps/%N/%B $HOME/%L/bitmaps/%B $HOME/%l/bitmaps/%B $HOME/bitmaps/%B $HOME/%B /usr/lib/X11/%L/bitmaps/%N/%B /usr/lib/X11/%l/bitmaps/%N/%B /usr/lib/X11/bitmaps/%N/%B /usr/lib/X11/%L/bitmaps/%B /usr/lib/X11/%l/bitmaps/%B /usr/lib/X11/bitmaps/%B /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
%N
%L
%l
Parameter descriptions are listed below:
Returns a pixmap when successful; returns XmUNSPECIFIED_PIXMAP if the image corresponding to image_name cannot be found.
XmDestroyPixmap(3X), XmInstallImage(3X), and XmUninstallImage(3X).