203 lines
6.9 KiB
Groff
203 lines
6.9 KiB
Groff
|
.\" Copyright (c) 1991 X Consortium
|
||
|
|
.\"
|
||
|
|
.\" Permission is hereby granted, free of charge, to any person obtaining a
|
||
|
|
.\" copy of this software and associated documentation files (the "Software"),
|
||
|
|
.\" to deal in the Software without restriction, including without limitation
|
||
|
|
.\" the rights to use, copy, modify, merge, publish, distribute, sublicense,
|
||
|
|
.\" and/or sell copies of the Software, and to permit persons to whom the
|
||
|
|
.\" Software furnished to do so, subject to the following conditions:
|
||
|
|
.\"
|
||
|
|
.\" The above copyright notice and this permission notice shall be included in
|
||
|
|
.\" all copies or substantial portions of the Software.
|
||
|
|
.\"
|
||
|
|
.\" THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
||
|
|
.\" IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
||
|
|
.\" FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
|
||
|
|
.\" THE X CONSORTIUM BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
|
||
|
|
.\" WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
|
||
|
|
.\" OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
|
||
|
|
.\" SOFTWARE.
|
||
|
|
.\"
|
||
|
|
.\" Except as contained in this notice, the name of the X Consortium shall not
|
||
|
|
.\" be used in advertising or otherwise to promote the sale, use or other
|
||
|
|
.\" dealing in this Software without prior written authorization from the
|
||
|
|
.\" X Consortium.
|
||
|
|
.\"
|
||
|
|
.\" Copyright 2006 Sun Microsystems, Inc. All Rights Reserved
|
||
|
|
.\"
|
||
|
|
.\" Permission is hereby granted, free of charge, to any person obtaining a
|
||
|
|
.\" copy of this software and associated documentation files (the "Software"),
|
||
|
|
.\" to deal in the Software without restriction, including without limitation
|
||
|
|
.\" the rights to use, copy, modify, merge, publish, distribute,
|
||
|
|
.\" sublicense, and/or sell copies of the Software, and to permit persons
|
||
|
|
.\" to whom the Software is furnished to do so, subject to the following
|
||
|
|
.\" conditions:
|
||
|
|
.\"
|
||
|
|
.\" The above copyright notice and this permission notice shall be
|
||
|
|
.\" included in all copies or substantial portions of the Software.
|
||
|
|
.\"
|
||
|
|
.\" THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
|
||
|
|
.\" EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
|
||
|
|
.\" MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
|
||
|
|
.\" IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
|
||
|
|
.\" DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
|
||
|
|
.\" OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR
|
||
|
|
.\" THE USE OR OTHER DEALINGS IN THE SOFTWARE.
|
||
|
|
.\"
|
||
|
|
.\" Except as contained in this notice, the names of the copyright holders
|
||
|
|
.\" shall not be used in advertising or otherwise to promote the sale, use
|
||
|
|
.\" or other dealings in this Software without prior written authorization
|
||
|
|
.\" from said copyright holders.
|
||
|
|
.\"
|
||
|
|
.\" X Window System is a trademark of The Open Group.
|
||
|
|
.\"
|
||
|
|
.de ZN
|
||
|
|
.ie t \fB\^\\$1\^\fR\\$2
|
||
|
|
.el \fI\^\\$1\^\fP\\$2
|
||
|
|
..
|
||
|
|
.TH XShm __libmansuffix__ __xorgversion__ "X FUNCTIONS"
|
||
|
|
.SH NAME
|
||
|
|
XShmQueryExtension, XShmQueryVersion, XShmPixmapFormat, XShmAttach, XShmDetach
|
||
|
|
XShmCreateImage, XShmPutImage, XShmGetImage, XShmCreatePixmap, XShmGetEventBase - X Shared Memory extension functions
|
||
|
|
.SH SYNTAX
|
||
|
|
.nf
|
||
|
|
.LP
|
||
|
|
\&#include <X11/Xlib.h>
|
||
|
|
\&#include <sys/ipc.h>
|
||
|
|
\&#include <sys/shm.h>
|
||
|
|
\&#include <X11/extensions/XShm.h>
|
||
|
|
.LP
|
||
|
|
Bool XShmQueryExtension(
|
||
|
|
Display *display);
|
||
|
|
.LP
|
||
|
|
Bool XShmQueryVersion(
|
||
|
|
Display *display;
|
||
|
|
int *major, *minor;
|
||
|
|
Bool *pixmaps);
|
||
|
|
.LP
|
||
|
|
Status XShmPixmapFormat(
|
||
|
|
Display *display);
|
||
|
|
.LP
|
||
|
|
Status XShmAttach(
|
||
|
|
Display *display;
|
||
|
|
XShmSegmentInfo *shminfo);
|
||
|
|
.LP
|
||
|
|
Status XShmDetach(
|
||
|
|
Display *display;
|
||
|
|
XShmSegmentInfo *shminfo);
|
||
|
|
|
||
|
|
.LP
|
||
|
|
XImage *XShmCreateImage (
|
||
|
|
Display *display;
|
||
|
|
Visual *visual;
|
||
|
|
unsigned int depth, width, height;
|
||
|
|
int format;
|
||
|
|
char *data;
|
||
|
|
XShmSegmentInfo *shminfo);
|
||
|
|
.LP
|
||
|
|
Status XShmPutImage(
|
||
|
|
Display *display;
|
||
|
|
Drawable d;
|
||
|
|
GC gc;
|
||
|
|
XImage *image;
|
||
|
|
int src_x, src_y, dest_x, dest_y;
|
||
|
|
unsigned int width, height;
|
||
|
|
bool send_event);
|
||
|
|
.LP
|
||
|
|
Status XShmGetImage (
|
||
|
|
Display *display;
|
||
|
|
Drawable d;
|
||
|
|
XImage *image;
|
||
|
|
int x, y;
|
||
|
|
unsigned long plane_mask);
|
||
|
|
.LP
|
||
|
|
Pixmap XShmCreatePixmap(
|
||
|
|
Display *display;
|
||
|
|
Drawable d;
|
||
|
|
char *data;
|
||
|
|
XShmSegmentInfo *shminfo;
|
||
|
|
unsigned int width, height, depth);
|
||
|
|
.LP
|
||
|
|
Status XShmGetEventBase(
|
||
|
|
Display *display);
|
||
|
|
.LP
|
||
|
|
|
||
|
|
.fi
|
||
|
|
.SH STRUCTURES
|
||
|
|
.nf
|
||
|
|
.ta 3i
|
||
|
|
\fIEvents:\fP
|
||
|
|
typedef struct {
|
||
|
|
int type; /\\(* of event */
|
||
|
|
unsigned long serial; /\\(* # of last request processed by server*/
|
||
|
|
Bool send_event; /\\(* true if this came from a SendEvent request*/
|
||
|
|
Display *display; /\\(* Display the event was read from */
|
||
|
|
Drawable drawable; /\\(* drawable of request */
|
||
|
|
int major_code; /\\(* ShmReqCode */
|
||
|
|
int minor_code; /\\(* X_ShmPutImage */
|
||
|
|
ShmSeg shmseg; /\\(* the ShmSeg used in the request*/
|
||
|
|
unsigned long offset; /\\(* the offset into ShmSeg used in the request*/
|
||
|
|
} XShmCompletionEvent;
|
||
|
|
.LP
|
||
|
|
\fIa structure of type XShmSegmentInfo :\fP
|
||
|
|
|
||
|
|
typedef struct {
|
||
|
|
ShmSeg shmseg; /\\(* resource id */
|
||
|
|
int shmid; /\\(* kernel id */
|
||
|
|
char *shmaddr; /\\(* address in client */
|
||
|
|
Bool readOnly; /\\(* how the server should attach it */
|
||
|
|
} XShmSegmentInfo;
|
||
|
|
|
||
|
|
.SH DESCRIPTION
|
||
|
|
.PP
|
||
|
|
.PP
|
||
|
|
.ZN XShmQueryExtension
|
||
|
|
checks to see if the shared memory extensions are available for the
|
||
|
|
specified display.
|
||
|
|
.PP
|
||
|
|
.ZN XShmQueryVersion
|
||
|
|
returns the version numbers of the extension implementation. Shared
|
||
|
|
memory pixmaps are supported if the pixmaps argument returns true.
|
||
|
|
.PP
|
||
|
|
.ZN XShmAttach
|
||
|
|
tells the server to attach to your shared memory segment. If all goes
|
||
|
|
well, you will get a non-zero status, back and your XImage is ready
|
||
|
|
for use.
|
||
|
|
.PP
|
||
|
|
.ZN XShmDetach
|
||
|
|
tells the server to detach from your shared memory segment.
|
||
|
|
.PP
|
||
|
|
.ZN XShmPutImage
|
||
|
|
combines an image in memory with a shape of the specified drawable. If
|
||
|
|
XYBitmap format is used, the depth must be one, or a ``BadMatch''
|
||
|
|
error results. The foreground pixel in the GC defines the source for
|
||
|
|
the one bits in the image, and the background pixel defines the source
|
||
|
|
for the zero bits. For XYPixmap and ZPixmap, the depth must match the
|
||
|
|
depth of the drawable, or a ``BadMatch'' error results.
|
||
|
|
.PP
|
||
|
|
.ZN XShmGetImage
|
||
|
|
reads image data into a shared memory XImage where display is the
|
||
|
|
display of interest, drawable is the source drawable, image is the
|
||
|
|
destination XImage, x and y are offsets within the drawable, and
|
||
|
|
plane_mask defines which planes are to be read.
|
||
|
|
.PP
|
||
|
|
.ZN XShmCreateImage
|
||
|
|
allocates the memory needed for an XImage structure for the specified
|
||
|
|
display but does not allocate space for the image itself.
|
||
|
|
.PP
|
||
|
|
.ZN XShmPixmapFormat
|
||
|
|
gets the format for the server. If your application can deal with the
|
||
|
|
server pixmap data format, a shared memory segment and shminfo
|
||
|
|
structure are created.
|
||
|
|
.PP
|
||
|
|
.ZN XShmCreatePixmap
|
||
|
|
points to a pixmap which you can manipulate in all of the usual ways,
|
||
|
|
with the added bonus of being able to edit its contents directly
|
||
|
|
through the shared memory segment.
|
||
|
|
.PP
|
||
|
|
.ZN XShmGetEventBase
|
||
|
|
gets the completion event value.
|
||
|
|
.PP
|
||
|
|
.SH SEE ALSO
|
||
|
|
\fIMIT-SHM - The MIT Shared Memory Extension \fP
|