git update 8/7/2010

1 files changed, 434 insertions, 436 deletions

diff --git a/libXext/src/XShm.c b/libXext/src/XShm.c
index 38efa9fa4..81d2b9db6 100644
--- a/libXext/src/XShm.c
+++ b/libXext/src/XShm.c
@@ -1,436 +1,434 @@
-/* $XdotOrg: $ */
-/*
- * $Xorg: XShm.c,v 1.4 2001/02/09 02:03:49 xorgcvs Exp $
- *
-Copyright 1989, 1998  The Open Group
-
-Permission to use, copy, modify, distribute, and sell this software and its
-documentation for any purpose is hereby granted without fee, provided that
-the above copyright notice appear in all copies and that both that
-copyright notice and this permission notice appear in supporting
-documentation.
-
-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
-OPEN GROUP 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 Open Group shall not be
-used in advertising or otherwise to promote the sale, use or other dealings
-in this Software without prior written authorization from The Open Group.
- *
- * Author:  Bob Scheifler and Keith Packard, MIT X Consortium
- */
-/* $XFree86: xc/lib/Xext/XShm.c,v 1.6 2002/10/16 02:19:22 dawes Exp $ */
-
-/* THIS IS NOT AN X CONSORTIUM STANDARD OR AN X PROJECT TEAM SPECIFICATION */
-
-#define NEED_EVENTS
-#define NEED_REPLIES
-#ifdef HAVE_CONFIG_H
-#include <config.h>
-#endif
-#include <stdio.h>
-#include <X11/Xlibint.h>
-#include <X11/ImUtil.h>
-#include <X11/extensions/XShm.h>
-#include <X11/extensions/shmproto.h>
-#include <X11/extensions/Xext.h>
-#include <X11/extensions/extutil.h>
-
-static XExtensionInfo _shm_info_data;
-static XExtensionInfo *shm_info = &_shm_info_data;
-static /* const */ char *shm_extension_name = SHMNAME;
-
-#define ShmCheckExtension(dpy,i,val) \
-  XextCheckExtension (dpy, i, shm_extension_name, val)
-
-/*****************************************************************************
- *                                                                           *
- *			   private utility routines                          *
- *                                                                           *
- *****************************************************************************/
-
-static int close_display(Display *dpy, XExtCodes *codes);
-static char *error_string(Display *dpy, int code, XExtCodes *codes,
-			  char *buf, int n);
-static Bool wire_to_event (Display *dpy, XEvent *re, xEvent *event);
-static Status event_to_wire (Display *dpy, XEvent *re, xEvent *event);
-static /* const */ XExtensionHooks shm_extension_hooks = {
-    NULL,				/* create_gc */
-    NULL,				/* copy_gc */
-    NULL,				/* flush_gc */
-    NULL,				/* free_gc */
-    NULL,				/* create_font */
-    NULL,				/* free_font */
-    close_display,			/* close_display */
-    wire_to_event,			/* wire_to_event */
-    event_to_wire,			/* event_to_wire */
-    NULL,				/* error */
-    error_string,			/* error_string */
-};
-
-static /* const */ char *shm_error_list[] = {
-    "BadShmSeg",			/* BadShmSeg */
-};
-
-static XEXT_GENERATE_FIND_DISPLAY (find_display, shm_info, shm_extension_name, 
-				   &shm_extension_hooks, ShmNumberEvents, NULL)
-
-static XEXT_GENERATE_CLOSE_DISPLAY (close_display, shm_info)
-
-static XEXT_GENERATE_ERROR_STRING (error_string, shm_extension_name,
-				   ShmNumberErrors, shm_error_list)
-
-
-static Bool
-wire_to_event (Display *dpy, XEvent *re, xEvent *event)
-{
-    XExtDisplayInfo *info = find_display (dpy);
-    XShmCompletionEvent	*se;
-    xShmCompletionEvent	*sevent;
-
-    ShmCheckExtension (dpy, info, False);
-
-    switch ((event->u.u.type & 0x7f) - info->codes->first_event) {
-    case ShmCompletion:
-	se = (XShmCompletionEvent *) re;
-	sevent = (xShmCompletionEvent *) event;
-	se->type = sevent->type & 0x7f;
-	se->serial = _XSetLastRequestRead(dpy,(xGenericReply *) event);
-	se->send_event = (sevent->type & 0x80) != 0;
-	se->display = dpy;
-	se->drawable = sevent->drawable;
-	se->major_code = sevent->majorEvent;
-	se->minor_code = sevent->minorEvent;
-	se->shmseg = sevent->shmseg;
-	se->offset = sevent->offset;
-    	return True;
-    }
-    return False;
-}
-
-static Status
-event_to_wire (Display *dpy, XEvent *re, xEvent *event)
-{
-    XExtDisplayInfo *info = find_display (dpy);
-    XShmCompletionEvent	*se;
-    xShmCompletionEvent	*sevent;
-
-    ShmCheckExtension (dpy, info, 0);
-
-    switch ((re->type & 0x7f) - info->codes->first_event) {
-    case ShmCompletion:
-    	se = (XShmCompletionEvent *) re;
-	sevent = (xShmCompletionEvent *) event;
-    	sevent->type = se->type | (se->send_event ? 0x80 : 0);
-    	sevent->sequenceNumber = se->serial & 0xffff;
-    	sevent->drawable = se->drawable;
-    	sevent->majorEvent = se->major_code;
-    	sevent->minorEvent = se->minor_code;
-    	sevent->shmseg = se->shmseg;
-    	sevent->offset = se->offset;
-    	return True;
-    }
-    return False;
-}
-
-/*****************************************************************************
- *                                                                           *
- *		    public Shared Memory Extension routines                  *
- *                                                                           *
- *****************************************************************************/
-
-Bool XShmQueryExtension (Display *dpy /*  int *event_basep, *error_basep */)
-{
-    XExtDisplayInfo *info = find_display (dpy);
-
-    if (XextHasExtension(info)) {
-/*	*event_basep = info->codes->first_event;
-	*error_basep = info->codes->error_event; */
-	return True;
-    } else {
-	return False;
-    }
-}
-
-
-int XShmGetEventBase(Display *dpy)
-{
-    XExtDisplayInfo *info = find_display (dpy);
-
-    if (XextHasExtension(info)) {
-	return info->codes->first_event;
-    } else {
-	return -1;
-    }
-}
-
-
-Bool XShmQueryVersion(
-    Display *dpy,
-    int *majorVersion,
-    int *minorVersion,
-    Bool *sharedPixmaps)
-{
-    XExtDisplayInfo *info = find_display (dpy);
-    xShmQueryVersionReply rep;
-    register xShmQueryVersionReq *req;
-
-    ShmCheckExtension (dpy, info, False);
-
-    LockDisplay(dpy);
-    GetReq(ShmQueryVersion, req);
-    req->reqType = info->codes->major_opcode;
-    req->shmReqType = X_ShmQueryVersion;
-    if (!_XReply(dpy, (xReply *)&rep, 0, xFalse)) {
-	UnlockDisplay(dpy);
-	SyncHandle();
-	return False;
-    }
-    *majorVersion = rep.majorVersion;
-    *minorVersion = rep.minorVersion;
-    *sharedPixmaps = rep.sharedPixmaps ? True : False;
-    UnlockDisplay(dpy);
-    SyncHandle();
-    return True;
-}
-
-
-int XShmPixmapFormat(Display *dpy)
-{
-    XExtDisplayInfo *info = find_display (dpy);
-    xShmQueryVersionReply rep;
-    register xShmQueryVersionReq *req;
-
-    ShmCheckExtension (dpy, info, False);
-
-    LockDisplay(dpy);
-    GetReq(ShmQueryVersion, req);
-    req->reqType = info->codes->major_opcode;
-    req->shmReqType = X_ShmQueryVersion;
-    if (!_XReply(dpy, (xReply *)&rep, 0, xFalse)) {
-	UnlockDisplay(dpy);
-	SyncHandle();
-	return 0;
-    }
-    UnlockDisplay(dpy);
-    SyncHandle();
-    if (rep.sharedPixmaps &&
-	(rep.majorVersion > 1 || rep.minorVersion > 0))
-	return rep.pixmapFormat;
-    return 0;
-}
-
-
-Status XShmAttach(Display *dpy, XShmSegmentInfo *shminfo)
-{
-    XExtDisplayInfo *info = find_display (dpy);
-    register xShmAttachReq *req;
-
-    ShmCheckExtension (dpy, info, 0);
-
-    LockDisplay(dpy);
-    GetReq(ShmAttach, req);
-    req->reqType = info->codes->major_opcode;
-    req->shmReqType = X_ShmAttach;
-    req->shmseg = shminfo->shmseg = XAllocID(dpy);
-    req->shmid = shminfo->shmid;
-    req->readOnly = shminfo->readOnly ? xTrue : xFalse;
-    UnlockDisplay(dpy);
-    SyncHandle();
-    return 1;
-}
-
-
-Status XShmDetach(Display *dpy, XShmSegmentInfo *shminfo)
-{
-    XExtDisplayInfo *info = find_display (dpy);
-    register xShmDetachReq *req;
-
-    ShmCheckExtension (dpy, info, 0);
-
-    LockDisplay(dpy);
-    GetReq(ShmDetach, req);
-    req->reqType = info->codes->major_opcode;
-    req->shmReqType = X_ShmDetach;
-    req->shmseg = shminfo->shmseg;
-    UnlockDisplay(dpy);
-    SyncHandle();
-    return 1;
-}
-
-static int _XShmDestroyImage (XImage *ximage)
-{
-	Xfree((char *)ximage);
-	return 1;
-}
-
-#define ROUNDUP(nbytes, pad) ((((nbytes) + ((pad) - 1)) / (pad)) * (pad))
-
-XImage *XShmCreateImage (
-    register Display *dpy,
-    register Visual *visual,
-    unsigned int depth,
-    int format,
-    char *data,
-    XShmSegmentInfo *shminfo,
-    unsigned int width,
-    unsigned int height)
-{
-    register XImage *image;
-
-    image = (XImage *)Xcalloc(1, (unsigned)sizeof(XImage));
-    if (!image)
-	return image;
-    image->data = data;
-    image->obdata = (char *)shminfo;
-    image->width = width;
-    image->height = height;
-    image->depth = depth;
-    image->format = format;
-    image->byte_order = dpy->byte_order;
-    image->bitmap_unit = dpy->bitmap_unit;
-    image->bitmap_bit_order = dpy->bitmap_bit_order;
-    image->bitmap_pad = _XGetScanlinePad(dpy, depth);
-    image->xoffset = 0;
-    if (visual) {
-	image->red_mask = visual->red_mask;
-	image->green_mask = visual->green_mask;
-	image->blue_mask = visual->blue_mask;
-    } else {
-	image->red_mask = image->green_mask = image->blue_mask = 0;
-    }
-    if (format == ZPixmap)
-	image->bits_per_pixel = _XGetBitsPerPixel(dpy, (int)depth);
-    else
-	image->bits_per_pixel = 1;
-    image->bytes_per_line = ROUNDUP((image->bits_per_pixel * width),
-				    image->bitmap_pad) >> 3;
-    _XInitImageFuncPtrs(image);
-    image->f.destroy_image = _XShmDestroyImage;
-    return image;
-}
-
-Status XShmPutImage (
-    register Display *dpy,
-    Drawable d,
-    GC gc,
-    register XImage *image,
-    int src_x, int src_y, int dst_x, int dst_y,
-    unsigned int src_width, unsigned int src_height,
-    Bool send_event)
-{
-    XExtDisplayInfo *info = find_display (dpy);
-    XShmSegmentInfo *shminfo = (XShmSegmentInfo *)image->obdata;
-    register xShmPutImageReq *req;
-
-    ShmCheckExtension (dpy, info, 0);
-    if (!shminfo) return 0;
-
-    LockDisplay(dpy);
-    FlushGC(dpy, gc);
-    GetReq(ShmPutImage, req);
-    req->reqType = info->codes->major_opcode;
-    req->shmReqType = X_ShmPutImage;
-    req->drawable = d;
-    req->gc = gc->gid;
-    req->srcX = src_x;
-    req->srcY = src_y;
-    req->srcWidth = src_width;
-    req->srcHeight = src_height;
-    req->dstX = dst_x;
-    req->dstY = dst_y;
-    req->totalWidth = image->width;
-    req->totalHeight = image->height;
-    req->depth = image->depth;
-    req->format = image->format;
-    req->sendEvent = send_event;
-    req->shmseg = shminfo->shmseg;
-    req->offset = image->data - shminfo->shmaddr;
-    UnlockDisplay(dpy);
-    SyncHandle();
-    return 1;
-}
-
-
-Status XShmGetImage(
-    register Display *dpy,
-    Drawable d,
-    XImage *image,
-    int x, int y,
-    unsigned long plane_mask)
-{
-    XExtDisplayInfo *info = find_display (dpy);
-    XShmSegmentInfo *shminfo = (XShmSegmentInfo *)image->obdata;
-    register xShmGetImageReq *req;
-    xShmGetImageReply rep;
-    register Visual *visual;
-
-    ShmCheckExtension (dpy, info, 0);
-    if (!shminfo) return 0;
-
-    LockDisplay(dpy);
-    GetReq(ShmGetImage, req);
-    req->reqType = info->codes->major_opcode;
-    req->shmReqType = X_ShmGetImage;
-    req->drawable = d;
-    req->x = x;
-    req->y = y;
-    req->width = image->width;
-    req->height = image->height;
-    req->planeMask = plane_mask;
-    req->format = image->format;
-    req->shmseg = shminfo->shmseg;
-    req->offset = image->data - shminfo->shmaddr;
-    if (!_XReply(dpy, (xReply *)&rep, 0, xFalse)) {
-	UnlockDisplay(dpy);
-	SyncHandle();
-	return 0;
-    }
-    visual = _XVIDtoVisual(dpy, rep.visual);
-    if (visual) {
-    	image->red_mask = visual->red_mask;
-    	image->green_mask = visual->green_mask;
-    	image->blue_mask = visual->blue_mask;
-    } else {
-	image->red_mask = image->green_mask = image->blue_mask = 0;
-    }
-    UnlockDisplay(dpy);
-    SyncHandle();
-    return 1;
-}
-
-Pixmap XShmCreatePixmap (
-    register Display *dpy,
-    Drawable d,
-    char *data,
-    XShmSegmentInfo *shminfo,
-    unsigned int width, unsigned int height, unsigned int depth)
-{
-    XExtDisplayInfo *info = find_display (dpy);
-    Pixmap pid;
-    register xShmCreatePixmapReq *req;
-
-    ShmCheckExtension (dpy, info, 0);
-
-    LockDisplay(dpy);
-    GetReq(ShmCreatePixmap, req);
-    req->reqType = info->codes->major_opcode;
-    req->shmReqType = X_ShmCreatePixmap;
-    req->drawable = d;
-    req->width = width;
-    req->height = height;
-    req->depth = depth;
-    req->shmseg = shminfo->shmseg;
-    req->offset = data - shminfo->shmaddr;
-    pid = req->pid = XAllocID(dpy);
-    UnlockDisplay(dpy);
-    SyncHandle();
-    return pid;
-}
+/* $XdotOrg: $ */

+/*

+ * $Xorg: XShm.c,v 1.4 2001/02/09 02:03:49 xorgcvs Exp $

+ *

+Copyright 1989, 1998  The Open Group

+

+Permission to use, copy, modify, distribute, and sell this software and its

+documentation for any purpose is hereby granted without fee, provided that

+the above copyright notice appear in all copies and that both that

+copyright notice and this permission notice appear in supporting

+documentation.

+

+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

+OPEN GROUP 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 Open Group shall not be

+used in advertising or otherwise to promote the sale, use or other dealings

+in this Software without prior written authorization from The Open Group.

+ *

+ * Author:  Bob Scheifler and Keith Packard, MIT X Consortium

+ */

+/* $XFree86: xc/lib/Xext/XShm.c,v 1.6 2002/10/16 02:19:22 dawes Exp $ */

+

+/* THIS IS NOT AN X CONSORTIUM STANDARD OR AN X PROJECT TEAM SPECIFICATION */

+

+#ifdef HAVE_CONFIG_H

+#include <config.h>

+#endif

+#include <stdio.h>

+#include <X11/Xlibint.h>

+#include <X11/ImUtil.h>

+#include <X11/extensions/XShm.h>

+#include <X11/extensions/shmproto.h>

+#include <X11/extensions/Xext.h>

+#include <X11/extensions/extutil.h>

+

+static XExtensionInfo _shm_info_data;

+static XExtensionInfo *shm_info = &_shm_info_data;

+static /* const */ char *shm_extension_name = SHMNAME;

+

+#define ShmCheckExtension(dpy,i,val) \

+  XextCheckExtension (dpy, i, shm_extension_name, val)

+

+/*****************************************************************************

+ *                                                                           *

+ *			   private utility routines                          *

+ *                                                                           *

+ *****************************************************************************/

+

+static int close_display(Display *dpy, XExtCodes *codes);

+static char *error_string(Display *dpy, int code, XExtCodes *codes,

+			  char *buf, int n);

+static Bool wire_to_event (Display *dpy, XEvent *re, xEvent *event);

+static Status event_to_wire (Display *dpy, XEvent *re, xEvent *event);

+static /* const */ XExtensionHooks shm_extension_hooks = {

+    NULL,				/* create_gc */

+    NULL,				/* copy_gc */

+    NULL,				/* flush_gc */

+    NULL,				/* free_gc */

+    NULL,				/* create_font */

+    NULL,				/* free_font */

+    close_display,			/* close_display */

+    wire_to_event,			/* wire_to_event */

+    event_to_wire,			/* event_to_wire */

+    NULL,				/* error */

+    error_string,			/* error_string */

+};

+

+static /* const */ char *shm_error_list[] = {

+    "BadShmSeg",			/* BadShmSeg */

+};

+

+static XEXT_GENERATE_FIND_DISPLAY (find_display, shm_info, shm_extension_name, 

+				   &shm_extension_hooks, ShmNumberEvents, NULL)

+

+static XEXT_GENERATE_CLOSE_DISPLAY (close_display, shm_info)

+

+static XEXT_GENERATE_ERROR_STRING (error_string, shm_extension_name,

+				   ShmNumberErrors, shm_error_list)

+

+

+static Bool

+wire_to_event (Display *dpy, XEvent *re, xEvent *event)

+{

+    XExtDisplayInfo *info = find_display (dpy);

+    XShmCompletionEvent	*se;

+    xShmCompletionEvent	*sevent;

+

+    ShmCheckExtension (dpy, info, False);

+

+    switch ((event->u.u.type & 0x7f) - info->codes->first_event) {

+    case ShmCompletion:

+	se = (XShmCompletionEvent *) re;

+	sevent = (xShmCompletionEvent *) event;

+	se->type = sevent->type & 0x7f;

+	se->serial = _XSetLastRequestRead(dpy,(xGenericReply *) event);

+	se->send_event = (sevent->type & 0x80) != 0;

+	se->display = dpy;

+	se->drawable = sevent->drawable;

+	se->major_code = sevent->majorEvent;

+	se->minor_code = sevent->minorEvent;

+	se->shmseg = sevent->shmseg;

+	se->offset = sevent->offset;

+    	return True;

+    }

+    return False;

+}

+

+static Status

+event_to_wire (Display *dpy, XEvent *re, xEvent *event)

+{

+    XExtDisplayInfo *info = find_display (dpy);

+    XShmCompletionEvent	*se;

+    xShmCompletionEvent	*sevent;

+

+    ShmCheckExtension (dpy, info, 0);

+

+    switch ((re->type & 0x7f) - info->codes->first_event) {

+    case ShmCompletion:

+    	se = (XShmCompletionEvent *) re;

+	sevent = (xShmCompletionEvent *) event;

+    	sevent->type = se->type | (se->send_event ? 0x80 : 0);

+    	sevent->sequenceNumber = se->serial & 0xffff;

+    	sevent->drawable = se->drawable;

+    	sevent->majorEvent = se->major_code;

+    	sevent->minorEvent = se->minor_code;

+    	sevent->shmseg = se->shmseg;

+    	sevent->offset = se->offset;

+    	return True;

+    }

+    return False;

+}

+

+/*****************************************************************************

+ *                                                                           *

+ *		    public Shared Memory Extension routines                  *

+ *                                                                           *

+ *****************************************************************************/

+

+Bool XShmQueryExtension (Display *dpy /*  int *event_basep, *error_basep */)

+{

+    XExtDisplayInfo *info = find_display (dpy);

+

+    if (XextHasExtension(info)) {

+/*	*event_basep = info->codes->first_event;

+	*error_basep = info->codes->error_event; */

+	return True;

+    } else {

+	return False;

+    }

+}

+

+

+int XShmGetEventBase(Display *dpy)

+{

+    XExtDisplayInfo *info = find_display (dpy);

+

+    if (XextHasExtension(info)) {

+	return info->codes->first_event;

+    } else {

+	return -1;

+    }

+}

+

+

+Bool XShmQueryVersion(

+    Display *dpy,

+    int *majorVersion,

+    int *minorVersion,

+    Bool *sharedPixmaps)

+{

+    XExtDisplayInfo *info = find_display (dpy);

+    xShmQueryVersionReply rep;

+    register xShmQueryVersionReq *req;

+

+    ShmCheckExtension (dpy, info, False);

+

+    LockDisplay(dpy);

+    GetReq(ShmQueryVersion, req);

+    req->reqType = info->codes->major_opcode;

+    req->shmReqType = X_ShmQueryVersion;

+    if (!_XReply(dpy, (xReply *)&rep, 0, xFalse)) {

+	UnlockDisplay(dpy);

+	SyncHandle();

+	return False;

+    }

+    *majorVersion = rep.majorVersion;

+    *minorVersion = rep.minorVersion;

+    *sharedPixmaps = rep.sharedPixmaps ? True : False;

+    UnlockDisplay(dpy);

+    SyncHandle();

+    return True;

+}

+

+

+int XShmPixmapFormat(Display *dpy)

+{

+    XExtDisplayInfo *info = find_display (dpy);

+    xShmQueryVersionReply rep;

+    register xShmQueryVersionReq *req;

+

+    ShmCheckExtension (dpy, info, False);

+

+    LockDisplay(dpy);

+    GetReq(ShmQueryVersion, req);

+    req->reqType = info->codes->major_opcode;

+    req->shmReqType = X_ShmQueryVersion;

+    if (!_XReply(dpy, (xReply *)&rep, 0, xFalse)) {

+	UnlockDisplay(dpy);

+	SyncHandle();

+	return 0;

+    }

+    UnlockDisplay(dpy);

+    SyncHandle();

+    if (rep.sharedPixmaps &&

+	(rep.majorVersion > 1 || rep.minorVersion > 0))

+	return rep.pixmapFormat;

+    return 0;

+}

+

+

+Status XShmAttach(Display *dpy, XShmSegmentInfo *shminfo)

+{

+    XExtDisplayInfo *info = find_display (dpy);

+    register xShmAttachReq *req;

+

+    ShmCheckExtension (dpy, info, 0);

+

+    LockDisplay(dpy);

+    GetReq(ShmAttach, req);

+    req->reqType = info->codes->major_opcode;

+    req->shmReqType = X_ShmAttach;

+    req->shmseg = shminfo->shmseg = XAllocID(dpy);

+    req->shmid = shminfo->shmid;

+    req->readOnly = shminfo->readOnly ? xTrue : xFalse;

+    UnlockDisplay(dpy);

+    SyncHandle();

+    return 1;

+}

+

+

+Status XShmDetach(Display *dpy, XShmSegmentInfo *shminfo)

+{

+    XExtDisplayInfo *info = find_display (dpy);

+    register xShmDetachReq *req;

+

+    ShmCheckExtension (dpy, info, 0);

+

+    LockDisplay(dpy);

+    GetReq(ShmDetach, req);

+    req->reqType = info->codes->major_opcode;

+    req->shmReqType = X_ShmDetach;

+    req->shmseg = shminfo->shmseg;

+    UnlockDisplay(dpy);

+    SyncHandle();

+    return 1;

+}

+

+static int _XShmDestroyImage (XImage *ximage)

+{

+	Xfree((char *)ximage);

+	return 1;

+}

+

+#define ROUNDUP(nbytes, pad) ((((nbytes) + ((pad) - 1)) / (pad)) * (pad))

+

+XImage *XShmCreateImage (

+    register Display *dpy,

+    register Visual *visual,

+    unsigned int depth,

+    int format,

+    char *data,

+    XShmSegmentInfo *shminfo,

+    unsigned int width,

+    unsigned int height)

+{

+    register XImage *image;

+

+    image = (XImage *)Xcalloc(1, (unsigned)sizeof(XImage));

+    if (!image)

+	return image;

+    image->data = data;

+    image->obdata = (char *)shminfo;

+    image->width = width;

+    image->height = height;

+    image->depth = depth;

+    image->format = format;

+    image->byte_order = dpy->byte_order;

+    image->bitmap_unit = dpy->bitmap_unit;

+    image->bitmap_bit_order = dpy->bitmap_bit_order;

+    image->bitmap_pad = _XGetScanlinePad(dpy, depth);

+    image->xoffset = 0;

+    if (visual) {

+	image->red_mask = visual->red_mask;

+	image->green_mask = visual->green_mask;

+	image->blue_mask = visual->blue_mask;

+    } else {

+	image->red_mask = image->green_mask = image->blue_mask = 0;

+    }

+    if (format == ZPixmap)

+	image->bits_per_pixel = _XGetBitsPerPixel(dpy, (int)depth);

+    else

+	image->bits_per_pixel = 1;

+    image->bytes_per_line = ROUNDUP((image->bits_per_pixel * width),

+				    image->bitmap_pad) >> 3;

+    _XInitImageFuncPtrs(image);

+    image->f.destroy_image = _XShmDestroyImage;

+    return image;

+}

+

+Status XShmPutImage (

+    register Display *dpy,

+    Drawable d,

+    GC gc,

+    register XImage *image,

+    int src_x, int src_y, int dst_x, int dst_y,

+    unsigned int src_width, unsigned int src_height,

+    Bool send_event)

+{

+    XExtDisplayInfo *info = find_display (dpy);

+    XShmSegmentInfo *shminfo = (XShmSegmentInfo *)image->obdata;

+    register xShmPutImageReq *req;

+

+    ShmCheckExtension (dpy, info, 0);

+    if (!shminfo) return 0;

+

+    LockDisplay(dpy);

+    FlushGC(dpy, gc);

+    GetReq(ShmPutImage, req);

+    req->reqType = info->codes->major_opcode;

+    req->shmReqType = X_ShmPutImage;

+    req->drawable = d;

+    req->gc = gc->gid;

+    req->srcX = src_x;

+    req->srcY = src_y;

+    req->srcWidth = src_width;

+    req->srcHeight = src_height;

+    req->dstX = dst_x;

+    req->dstY = dst_y;

+    req->totalWidth = image->width;

+    req->totalHeight = image->height;

+    req->depth = image->depth;

+    req->format = image->format;

+    req->sendEvent = send_event;

+    req->shmseg = shminfo->shmseg;

+    req->offset = image->data - shminfo->shmaddr;

+    UnlockDisplay(dpy);

+    SyncHandle();

+    return 1;

+}

+

+

+Status XShmGetImage(

+    register Display *dpy,

+    Drawable d,

+    XImage *image,

+    int x, int y,

+    unsigned long plane_mask)

+{

+    XExtDisplayInfo *info = find_display (dpy);

+    XShmSegmentInfo *shminfo = (XShmSegmentInfo *)image->obdata;

+    register xShmGetImageReq *req;

+    xShmGetImageReply rep;

+    register Visual *visual;

+

+    ShmCheckExtension (dpy, info, 0);

+    if (!shminfo) return 0;

+

+    LockDisplay(dpy);

+    GetReq(ShmGetImage, req);

+    req->reqType = info->codes->major_opcode;

+    req->shmReqType = X_ShmGetImage;

+    req->drawable = d;

+    req->x = x;

+    req->y = y;

+    req->width = image->width;

+    req->height = image->height;

+    req->planeMask = plane_mask;

+    req->format = image->format;

+    req->shmseg = shminfo->shmseg;

+    req->offset = image->data - shminfo->shmaddr;

+    if (!_XReply(dpy, (xReply *)&rep, 0, xFalse)) {

+	UnlockDisplay(dpy);

+	SyncHandle();

+	return 0;

+    }

+    visual = _XVIDtoVisual(dpy, rep.visual);

+    if (visual) {

+    	image->red_mask = visual->red_mask;

+    	image->green_mask = visual->green_mask;

+    	image->blue_mask = visual->blue_mask;

+    } else {

+	image->red_mask = image->green_mask = image->blue_mask = 0;

+    }

+    UnlockDisplay(dpy);

+    SyncHandle();

+    return 1;

+}

+

+Pixmap XShmCreatePixmap (

+    register Display *dpy,

+    Drawable d,

+    char *data,

+    XShmSegmentInfo *shminfo,

+    unsigned int width, unsigned int height, unsigned int depth)

+{

+    XExtDisplayInfo *info = find_display (dpy);

+    Pixmap pid;

+    register xShmCreatePixmapReq *req;

+

+    ShmCheckExtension (dpy, info, 0);

+

+    LockDisplay(dpy);

+    GetReq(ShmCreatePixmap, req);

+    req->reqType = info->codes->major_opcode;

+    req->shmReqType = X_ShmCreatePixmap;

+    req->drawable = d;

+    req->width = width;

+    req->height = height;

+    req->depth = depth;

+    req->shmseg = shminfo->shmseg;

+    req->offset = data - shminfo->shmaddr;

+    pid = req->pid = XAllocID(dpy);

+    UnlockDisplay(dpy);

+    SyncHandle();

+    return pid;

+}