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+/* $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;
+}
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