A pixmap is a three-dimensional array of bits. A pixmap is
normally thought of as a two-dimensional array of pixels, where each
pixel can be a value from 0 to 2n-1, where n is
the depth of the pixmap. A pixmap can also be thought of as a stack of
n bitmaps. A bitmap is a single bit pixmap of depth 1. CLX
provides functions to:
-
Create or free a pixmap
-
Test if an object is a pixmap
-
Test if two pixmap objects are equal
-
Return the pixmap resource ID from a
pixmap object
Note that pixmaps can only be used on the screen where they were
created. Pixmaps are off-screen server resources that are used for a
number of operations. These include defining patterns for cursors or as
the source for certain raster operations.
| create-pixmap |
&key
:width :height :depth :drawable |
Function |
| |
-
:width, :height
-
The nonzero width and height (type
card16).
-
:depth
-
The depth (type
card8)
of the pixmap.
-
:drawable
-
A
drawable
which determines the screen where the pixmap will be used.
Creates a pixmap of the specified :width, :height,
and :depth. It is valid to pass a window whose class is
:input-only as the :drawable argument. The
:width and :height arguments must be nonzero. The
:depth must be supported by the screen of the specified
:drawable.
-
pixmap
-
Type
pixmap.
|
| free-pixmap |
pixmap |
Function |
| |
-
pixmap
-
A pixmap.
Allows the X server to free the pixmap storage when no other
server resources reference it. The pixmap should never be
referenced again.
|
| pixmap-display |
pixmap |
Function |
| |
-
pixmap
-
A pixmap.
Returns the
display
object associated with the specified pixmap.
-
display
-
Type
display.
|
| pixmap-equal |
pixmap-1
pixmap-2 |
Function |
| |
-
pixmap-1, pixmap-2
-
A three-dimensional array of bits to be tested.
Returns true if the two arguments refer to the same server
resource, and nil if they do not.
|
| pixmap-id |
pixmap |
Function |
| |
-
pixmap
-
A pixmap.
Returns the unique resource ID that has been assigned to the
specified pixmap.
-
id
-
Type
resource-id.
|
| |
Returns true if the argument is a
pixmap
object and nil otherwise.
-
pixmap
-
Type
boolean.
|
| pixmap-plist |
pixmap |
Function |
| |
-
pixmap
-
A pixmap.
Returns and (with setf) sets the property list for the
specified pixmap. This function provides a hook where
extensions can add data.
-
plist
-
A property list.
|