diff options
Diffstat (limited to 'libXext/src/Xdbe.c')
| -rw-r--r-- | libXext/src/Xdbe.c | 947 |
1 files changed, 472 insertions, 475 deletions
diff --git a/libXext/src/Xdbe.c b/libXext/src/Xdbe.c index 77344b4aa..2dd3509ca 100644 --- a/libXext/src/Xdbe.c +++ b/libXext/src/Xdbe.c @@ -1,475 +1,472 @@ -/* $Xorg: Xdbe.c,v 1.4 2000/08/17 19:45:53 cpqbld Exp $ */ -/****************************************************************************** - * - * Copyright (c) 1994, 1995 Hewlett-Packard Company - * - * 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 HEWLETT-PACKARD COMPANY 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 Hewlett-Packard - * Company 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 Hewlett-Packard Company. - * - * Xlib DBE code - * - *****************************************************************************/ -/* $XFree86: xc/lib/Xext/Xdbe.c,v 3.7 2002/10/16 02:19:22 dawes Exp $ */ - -#define NEED_EVENTS -#define NEED_REPLIES -#ifdef HAVE_CONFIG_H -#include <config.h> -#endif -#include <stdio.h> -#include <X11/Xlibint.h> -#include <X11/extensions/Xext.h> -#include <X11/extensions/extutil.h> -#include <X11/extensions/Xdbe.h> -#include <X11/extensions/dbeproto.h> - -static XExtensionInfo _dbe_info_data; -static XExtensionInfo *dbe_info = &_dbe_info_data; -static char *dbe_extension_name = DBE_PROTOCOL_NAME; - -#define DbeCheckExtension(dpy,i,val) \ - XextCheckExtension (dpy, i, dbe_extension_name, val) -#define DbeSimpleCheckExtension(dpy,i) \ - XextSimpleCheckExtension (dpy, i, dbe_extension_name) - -#if !defined(UNIXCPP) -#define DbeGetReq(name,req,info) GetReq (name, req); \ - req->reqType = info->codes->major_opcode; \ - req->dbeReqType = X_##name; -#else -#define DbeGetReq(name,req,info) GetReq (name, req); \ - req->reqType = info->codes->major_opcode; \ - req->dbeReqType = X_/**/name; -#endif - - -/***************************************************************************** - * * - * private utility routines * - * * - *****************************************************************************/ - -/* - * find_display - locate the display info block - */ -static int close_display(Display *dpy, XExtCodes *codes); -static char *error_string(Display *dpy, int code, XExtCodes *codes, - char *buf, int n); -static XExtensionHooks dbe_extension_hooks = { - NULL, /* create_gc */ - NULL, /* copy_gc */ - NULL, /* flush_gc */ - NULL, /* free_gc */ - NULL, /* create_font */ - NULL, /* free_font */ - close_display, /* close_display */ - NULL, /* wire_to_event */ - NULL, /* event_to_wire */ - NULL, /* error */ - error_string, /* error_string */ -}; - -static char *dbe_error_list[] = { - "BadBuffer", /* DbeBadBuffer */ -}; - -static XEXT_GENERATE_FIND_DISPLAY (find_display, dbe_info, - dbe_extension_name, - &dbe_extension_hooks, - DbeNumberEvents, NULL) - -static XEXT_GENERATE_CLOSE_DISPLAY (close_display, dbe_info) - -static XEXT_GENERATE_ERROR_STRING (error_string, dbe_extension_name, - DbeNumberErrors, - dbe_error_list) - - -/***************************************************************************** - * * - * Double-Buffering public interfaces * - * * - *****************************************************************************/ - -/* - * XdbeQueryExtension - - * Sets major_version_return and minor_verion_return to the major and - * minor DBE protocol version supported by the server. If the DBE - * library is compatible with the version returned by the server, this - * function returns non-zero. If dpy does not support the DBE - * extension, or if there was an error during communication with the - * server, or if the server and library protocol versions are - * incompatible, this functions returns zero. No other Xdbe functions - * may be called before this function. If a client violates this rule, - * the effects of all subsequent Xdbe calls are undefined. - */ -Status XdbeQueryExtension ( - Display *dpy, - int *major_version_return, - int *minor_version_return) -{ - XExtDisplayInfo *info = find_display (dpy); - xDbeGetVersionReply rep; - register xDbeGetVersionReq *req; - - if (!XextHasExtension (info)) - return (Status)0; /* failure */ - - LockDisplay (dpy); - DbeGetReq (DbeGetVersion, req, info); - req->majorVersion = DBE_MAJOR_VERSION; - req->minorVersion = DBE_MINOR_VERSION; - - if (!_XReply (dpy, (xReply *) &rep, 0, xTrue)) { - UnlockDisplay (dpy); - SyncHandle (); - return (Status)0; /* failure */ - } - *major_version_return = rep.majorVersion; - *minor_version_return = rep.minorVersion; - UnlockDisplay (dpy); - - SyncHandle (); - - if (*major_version_return != DBE_MAJOR_VERSION) - return (Status)0; /* failure */ - else - return (Status)1; /* success */ -} - - -/* - * XdbeAllocateBackBuffer - - * This function returns a drawable ID used to refer to the back buffer - * of the specified window. The swap_action is a hint to indicate the - * swap action that will likely be used in subsequent calls to - * XdbeSwapBuffers. The actual swap action used in calls to - * XdbeSwapBuffers does not have to be the same as the swap_action - * passed to this function, though clients are encouraged to provide - * accurate information whenever possible. - */ - -XdbeBackBuffer XdbeAllocateBackBufferName( - Display *dpy, - Window window, - XdbeSwapAction swap_action) -{ - XExtDisplayInfo *info = find_display (dpy); - register xDbeAllocateBackBufferNameReq *req; - XdbeBackBuffer buffer; - - /* make sure extension is available; if not, return the - * third parameter (0). - */ - DbeCheckExtension (dpy, info, (XdbeBackBuffer)0); - - /* allocate the id */ - buffer = XAllocID (dpy); - - LockDisplay(dpy); - DbeGetReq(DbeAllocateBackBufferName, req, info); - req->window = window; - req->swapAction = (unsigned char)swap_action; - req->buffer = buffer; - - UnlockDisplay (dpy); - SyncHandle (); - return buffer; - -} /* XdbeAllocateBackBufferName() */ - -/* - * XdbeDeallocateBackBufferName - - * This function frees a drawable ID, buffer, that was obtained via - * XdbeAllocateBackBufferName. The buffer must refer to the back buffer - * of the specified window, or a protocol error results. - */ -Status XdbeDeallocateBackBufferName ( - Display *dpy, - XdbeBackBuffer buffer) -{ - XExtDisplayInfo *info = find_display (dpy); - register xDbeDeallocateBackBufferNameReq *req; - - DbeCheckExtension (dpy, info, (Status)0 /* failure */); - - LockDisplay (dpy); - DbeGetReq (DbeDeallocateBackBufferName, req, info); - req->buffer = buffer; - UnlockDisplay (dpy); - SyncHandle (); - - return (Status)1; /* success */ -} - - -/* - * XdbeSwapBuffers - - * This function swaps the front and back buffers for a list of windows. - * The argument num_windows specifies how many windows are to have their - * buffers swapped; it is the number of elements in the swap_info array. - * The argument swap_info specifies the information needed per window - * to do the swap. - */ -Status XdbeSwapBuffers ( - Display *dpy, - XdbeSwapInfo *swap_info, - int num_windows) -{ - XExtDisplayInfo *info = find_display (dpy); - register xDbeSwapBuffersReq *req; - int i; - - DbeCheckExtension (dpy, info, (Status)0 /* failure */); - - LockDisplay (dpy); - DbeGetReq (DbeSwapBuffers, req, info); - req->length += 2*num_windows; - req->n = num_windows; - - /* We need to handle 64-bit machines, where we can not use PackData32 - * directly because info would be lost in translating from 32- to 64-bit. - * Instead we send data via a loop that accounts for the translation. - */ - for (i = 0; i < num_windows; i++) - { - char tmp[4]; - Data32 (dpy, (long *)&swap_info[i].swap_window, 4); - tmp[0] = swap_info[i].swap_action; - Data (dpy, (char *)tmp, 4); - } - - UnlockDisplay (dpy); - SyncHandle (); - - - return (Status)1; /* success */ - -} /* XdbeSwapBuffers() */ - - -/* - * XdbeBeginIdiom - - * This function marks the beginning of an idiom sequence. - */ -Status XdbeBeginIdiom (Display *dpy) -{ - XExtDisplayInfo *info = find_display(dpy); - register xDbeBeginIdiomReq *req; - - DbeCheckExtension (dpy, info, (Status)0 /* failure */); - - LockDisplay (dpy); - DbeGetReq (DbeBeginIdiom, req, info); - UnlockDisplay (dpy); - SyncHandle (); - - return (Status)1; /* success */ -} - - -/* - * XdbeEndIdiom - - * This function marks the end of an idiom sequence. - */ -Status XdbeEndIdiom (Display *dpy) -{ - XExtDisplayInfo *info = find_display(dpy); - register xDbeEndIdiomReq *req; - - DbeCheckExtension (dpy, info, (Status)0 /* failure */); - - LockDisplay (dpy); - DbeGetReq (DbeEndIdiom, req, info); - UnlockDisplay (dpy); - SyncHandle (); - - return (Status)1; /* success */ -} - - -/* - * XdbeGetVisualInfo - - * This function returns information about which visuals support - * double buffering. The argument num_screens specifies how many - * elements there are in the screen_specifiers list. Each drawable - * in screen_specifiers designates a screen for which the supported - * visuals are being requested. If num_screens is zero, information - * for all screens is requested. In this case, upon return from this - * function, num_screens will be set to the number of screens that were - * found. If an error occurs, this function returns NULL, else it returns - * a pointer to a list of XdbeScreenVisualInfo structures of length - * num_screens. The nth element in the returned list corresponds to the - * nth drawable in the screen_specifiers list, unless num_screens was - * passed in with the value zero, in which case the nth element in the - * returned list corresponds to the nth screen of the server, starting - * with screen zero. - */ -XdbeScreenVisualInfo *XdbeGetVisualInfo ( - Display *dpy, - Drawable *screen_specifiers, - int *num_screens) /* SEND and RETURN */ -{ - XExtDisplayInfo *info = find_display(dpy); - register xDbeGetVisualInfoReq *req; - xDbeGetVisualInfoReply rep; - XdbeScreenVisualInfo *scrVisInfo; - int i; - - DbeCheckExtension (dpy, info, (XdbeScreenVisualInfo *)NULL); - - LockDisplay (dpy); - - DbeGetReq(DbeGetVisualInfo, req, info); - req->length = 2 + *num_screens; - req->n = *num_screens; - Data32 (dpy, screen_specifiers, (*num_screens * sizeof (CARD32))); - - if (!_XReply (dpy, (xReply *) &rep, 0, xFalse)) { - UnlockDisplay (dpy); - SyncHandle (); - return NULL; - } - - /* return the number of screens actually found if we - * requested information about all screens (*num_screens == 0) - */ - if (*num_screens == 0) - *num_screens = rep.m; - - /* allocate list of visual information to be returned */ - if (!(scrVisInfo = - (XdbeScreenVisualInfo *)Xmalloc( - (unsigned)(*num_screens * sizeof(XdbeScreenVisualInfo))))) { - UnlockDisplay (dpy); - SyncHandle (); - return NULL; - } - - for (i = 0; i < *num_screens; i++) - { - int nbytes; - int j; - long c; - - _XRead32 (dpy, &c, sizeof(CARD32)); - scrVisInfo[i].count = c; - - nbytes = scrVisInfo[i].count * sizeof(XdbeVisualInfo); - - /* if we can not allocate the list of visual/depth info - * then free the lists that we already allocate as well - * as the visual info list itself - */ - if (!(scrVisInfo[i].visinfo = (XdbeVisualInfo *)Xmalloc( - (unsigned)nbytes))) { - for (j = 0; j < i; j++) { - Xfree ((char *)scrVisInfo[j].visinfo); - } - Xfree ((char *)scrVisInfo); - UnlockDisplay (dpy); - SyncHandle (); - return NULL; - } - - /* Read the visual info item into the wire structure. Then copy each - * element into the library structure. The element sizes and/or - * padding may be different in the two structures. - */ - for (j = 0; j < scrVisInfo[i].count; j++) { - xDbeVisInfo xvi; - - _XRead (dpy, (char *)&xvi, sizeof(xDbeVisInfo)); - scrVisInfo[i].visinfo[j].visual = xvi.visualID; - scrVisInfo[i].visinfo[j].depth = xvi.depth; - scrVisInfo[i].visinfo[j].perflevel = xvi.perfLevel; - } - - } - - UnlockDisplay (dpy); - SyncHandle (); - return scrVisInfo; - -} /* XdbeGetVisualInfo() */ - - -/* - * XdbeFreeVisualInfo - - * This function frees the list of XdbeScreenVisualInfo returned by the - * function XdbeGetVisualInfo. - */ -void XdbeFreeVisualInfo(XdbeScreenVisualInfo *visual_info) -{ - if (visual_info == NULL) { - return; - } - - if (visual_info->visinfo) { - XFree(visual_info->visinfo); - } - - XFree(visual_info); -} - - -/* - * XdbeGetBackBufferAttributes - - * This function returns the attributes associated with the specified - * buffer. - */ -XdbeBackBufferAttributes *XdbeGetBackBufferAttributes( - Display *dpy, - XdbeBackBuffer buffer) -{ - XExtDisplayInfo *info = find_display(dpy); - register xDbeGetBackBufferAttributesReq *req; - xDbeGetBackBufferAttributesReply rep; - XdbeBackBufferAttributes *attr; - - DbeCheckExtension(dpy, info, (XdbeBackBufferAttributes *)NULL); - - if (!(attr = - (XdbeBackBufferAttributes *)Xmalloc(sizeof(XdbeBackBufferAttributes)))) { - return NULL; - } - - LockDisplay(dpy); - DbeGetReq(DbeGetBackBufferAttributes, req, info); - req->buffer = buffer; - - if (!_XReply (dpy, (xReply *) &rep, 0, xTrue)) { - UnlockDisplay (dpy); - SyncHandle (); - Xfree(attr); - return NULL; - } - attr->window = rep.attributes; - - UnlockDisplay (dpy); - SyncHandle (); - - return attr; -} - +/* $Xorg: Xdbe.c,v 1.4 2000/08/17 19:45:53 cpqbld Exp $ */
+/******************************************************************************
+ *
+ * Copyright (c) 1994, 1995 Hewlett-Packard Company
+ *
+ * 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 HEWLETT-PACKARD COMPANY 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 Hewlett-Packard
+ * Company 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 Hewlett-Packard Company.
+ *
+ * Xlib DBE code
+ *
+ *****************************************************************************/
+/* $XFree86: xc/lib/Xext/Xdbe.c,v 3.7 2002/10/16 02:19:22 dawes Exp $ */
+
+#define NEED_EVENTS
+#define NEED_REPLIES
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+#include <stdio.h>
+#include <X11/Xlibint.h>
+#include <X11/extensions/Xext.h>
+#include <X11/extensions/extutil.h>
+#include <X11/extensions/Xdbe.h>
+#include <X11/extensions/dbeproto.h>
+
+static XExtensionInfo _dbe_info_data;
+static XExtensionInfo *dbe_info = &_dbe_info_data;
+static char *dbe_extension_name = DBE_PROTOCOL_NAME;
+
+#define DbeCheckExtension(dpy,i,val) \
+ XextCheckExtension (dpy, i, dbe_extension_name, val)
+#define DbeSimpleCheckExtension(dpy,i) \
+ XextSimpleCheckExtension (dpy, i, dbe_extension_name)
+
+#if !defined(UNIXCPP)
+#define DbeGetReq(name,req,info) GetReq (name, req); \
+ req->reqType = info->codes->major_opcode; \
+ req->dbeReqType = X_##name;
+#else
+#define DbeGetReq(name,req,info) GetReq (name, req); \
+ req->reqType = info->codes->major_opcode; \
+ req->dbeReqType = X_/**/name;
+#endif
+
+
+/*****************************************************************************
+ * *
+ * private utility routines *
+ * *
+ *****************************************************************************/
+
+/*
+ * find_display - locate the display info block
+ */
+static int close_display(Display *dpy, XExtCodes *codes);
+static char *error_string(Display *dpy, int code, XExtCodes *codes,
+ char *buf, int n);
+static XExtensionHooks dbe_extension_hooks = {
+ NULL, /* create_gc */
+ NULL, /* copy_gc */
+ NULL, /* flush_gc */
+ NULL, /* free_gc */
+ NULL, /* create_font */
+ NULL, /* free_font */
+ close_display, /* close_display */
+ NULL, /* wire_to_event */
+ NULL, /* event_to_wire */
+ NULL, /* error */
+ error_string, /* error_string */
+};
+
+static char *dbe_error_list[] = {
+ "BadBuffer", /* DbeBadBuffer */
+};
+
+static XEXT_GENERATE_FIND_DISPLAY (find_display, dbe_info,
+ dbe_extension_name,
+ &dbe_extension_hooks,
+ DbeNumberEvents, NULL)
+
+static XEXT_GENERATE_CLOSE_DISPLAY (close_display, dbe_info)
+
+static XEXT_GENERATE_ERROR_STRING (error_string, dbe_extension_name,
+ DbeNumberErrors,
+ dbe_error_list)
+
+
+/*****************************************************************************
+ * *
+ * Double-Buffering public interfaces *
+ * *
+ *****************************************************************************/
+
+/*
+ * XdbeQueryExtension -
+ * Sets major_version_return and minor_verion_return to the major and
+ * minor DBE protocol version supported by the server. If the DBE
+ * library is compatible with the version returned by the server, this
+ * function returns non-zero. If dpy does not support the DBE
+ * extension, or if there was an error during communication with the
+ * server, or if the server and library protocol versions are
+ * incompatible, this functions returns zero. No other Xdbe functions
+ * may be called before this function. If a client violates this rule,
+ * the effects of all subsequent Xdbe calls are undefined.
+ */
+Status XdbeQueryExtension (
+ Display *dpy,
+ int *major_version_return,
+ int *minor_version_return)
+{
+ XExtDisplayInfo *info = find_display (dpy);
+ xDbeGetVersionReply rep;
+ register xDbeGetVersionReq *req;
+
+ if (!XextHasExtension (info))
+ return (Status)0; /* failure */
+
+ LockDisplay (dpy);
+ DbeGetReq (DbeGetVersion, req, info);
+ req->majorVersion = DBE_MAJOR_VERSION;
+ req->minorVersion = DBE_MINOR_VERSION;
+
+ if (!_XReply (dpy, (xReply *) &rep, 0, xTrue)) {
+ UnlockDisplay (dpy);
+ SyncHandle ();
+ return (Status)0; /* failure */
+ }
+ *major_version_return = rep.majorVersion;
+ *minor_version_return = rep.minorVersion;
+ UnlockDisplay (dpy);
+
+ SyncHandle ();
+
+ if (*major_version_return != DBE_MAJOR_VERSION)
+ return (Status)0; /* failure */
+ else
+ return (Status)1; /* success */
+}
+
+
+/*
+ * XdbeAllocateBackBuffer -
+ * This function returns a drawable ID used to refer to the back buffer
+ * of the specified window. The swap_action is a hint to indicate the
+ * swap action that will likely be used in subsequent calls to
+ * XdbeSwapBuffers. The actual swap action used in calls to
+ * XdbeSwapBuffers does not have to be the same as the swap_action
+ * passed to this function, though clients are encouraged to provide
+ * accurate information whenever possible.
+ */
+
+XdbeBackBuffer XdbeAllocateBackBufferName(
+ Display *dpy,
+ Window window,
+ XdbeSwapAction swap_action)
+{
+ XExtDisplayInfo *info = find_display (dpy);
+ register xDbeAllocateBackBufferNameReq *req;
+ XdbeBackBuffer buffer;
+
+ /* make sure extension is available; if not, return the
+ * third parameter (0).
+ */
+ DbeCheckExtension (dpy, info, (XdbeBackBuffer)0);
+
+ LockDisplay(dpy);
+ DbeGetReq(DbeAllocateBackBufferName, req, info);
+ req->window = window;
+ req->swapAction = (unsigned char)swap_action;
+ req->buffer = buffer = XAllocID (dpy);
+
+ UnlockDisplay (dpy);
+ SyncHandle ();
+ return buffer;
+
+} /* XdbeAllocateBackBufferName() */
+
+/*
+ * XdbeDeallocateBackBufferName -
+ * This function frees a drawable ID, buffer, that was obtained via
+ * XdbeAllocateBackBufferName. The buffer must refer to the back buffer
+ * of the specified window, or a protocol error results.
+ */
+Status XdbeDeallocateBackBufferName (
+ Display *dpy,
+ XdbeBackBuffer buffer)
+{
+ XExtDisplayInfo *info = find_display (dpy);
+ register xDbeDeallocateBackBufferNameReq *req;
+
+ DbeCheckExtension (dpy, info, (Status)0 /* failure */);
+
+ LockDisplay (dpy);
+ DbeGetReq (DbeDeallocateBackBufferName, req, info);
+ req->buffer = buffer;
+ UnlockDisplay (dpy);
+ SyncHandle ();
+
+ return (Status)1; /* success */
+}
+
+
+/*
+ * XdbeSwapBuffers -
+ * This function swaps the front and back buffers for a list of windows.
+ * The argument num_windows specifies how many windows are to have their
+ * buffers swapped; it is the number of elements in the swap_info array.
+ * The argument swap_info specifies the information needed per window
+ * to do the swap.
+ */
+Status XdbeSwapBuffers (
+ Display *dpy,
+ XdbeSwapInfo *swap_info,
+ int num_windows)
+{
+ XExtDisplayInfo *info = find_display (dpy);
+ register xDbeSwapBuffersReq *req;
+ int i;
+
+ DbeCheckExtension (dpy, info, (Status)0 /* failure */);
+
+ LockDisplay (dpy);
+ DbeGetReq (DbeSwapBuffers, req, info);
+ req->length += 2*num_windows;
+ req->n = num_windows;
+
+ /* We need to handle 64-bit machines, where we can not use PackData32
+ * directly because info would be lost in translating from 32- to 64-bit.
+ * Instead we send data via a loop that accounts for the translation.
+ */
+ for (i = 0; i < num_windows; i++)
+ {
+ char tmp[4];
+ Data32 (dpy, (long *)&swap_info[i].swap_window, 4);
+ tmp[0] = swap_info[i].swap_action;
+ Data (dpy, (char *)tmp, 4);
+ }
+
+ UnlockDisplay (dpy);
+ SyncHandle ();
+
+
+ return (Status)1; /* success */
+
+} /* XdbeSwapBuffers() */
+
+
+/*
+ * XdbeBeginIdiom -
+ * This function marks the beginning of an idiom sequence.
+ */
+Status XdbeBeginIdiom (Display *dpy)
+{
+ XExtDisplayInfo *info = find_display(dpy);
+ register xDbeBeginIdiomReq *req;
+
+ DbeCheckExtension (dpy, info, (Status)0 /* failure */);
+
+ LockDisplay (dpy);
+ DbeGetReq (DbeBeginIdiom, req, info);
+ UnlockDisplay (dpy);
+ SyncHandle ();
+
+ return (Status)1; /* success */
+}
+
+
+/*
+ * XdbeEndIdiom -
+ * This function marks the end of an idiom sequence.
+ */
+Status XdbeEndIdiom (Display *dpy)
+{
+ XExtDisplayInfo *info = find_display(dpy);
+ register xDbeEndIdiomReq *req;
+
+ DbeCheckExtension (dpy, info, (Status)0 /* failure */);
+
+ LockDisplay (dpy);
+ DbeGetReq (DbeEndIdiom, req, info);
+ UnlockDisplay (dpy);
+ SyncHandle ();
+
+ return (Status)1; /* success */
+}
+
+
+/*
+ * XdbeGetVisualInfo -
+ * This function returns information about which visuals support
+ * double buffering. The argument num_screens specifies how many
+ * elements there are in the screen_specifiers list. Each drawable
+ * in screen_specifiers designates a screen for which the supported
+ * visuals are being requested. If num_screens is zero, information
+ * for all screens is requested. In this case, upon return from this
+ * function, num_screens will be set to the number of screens that were
+ * found. If an error occurs, this function returns NULL, else it returns
+ * a pointer to a list of XdbeScreenVisualInfo structures of length
+ * num_screens. The nth element in the returned list corresponds to the
+ * nth drawable in the screen_specifiers list, unless num_screens was
+ * passed in with the value zero, in which case the nth element in the
+ * returned list corresponds to the nth screen of the server, starting
+ * with screen zero.
+ */
+XdbeScreenVisualInfo *XdbeGetVisualInfo (
+ Display *dpy,
+ Drawable *screen_specifiers,
+ int *num_screens) /* SEND and RETURN */
+{
+ XExtDisplayInfo *info = find_display(dpy);
+ register xDbeGetVisualInfoReq *req;
+ xDbeGetVisualInfoReply rep;
+ XdbeScreenVisualInfo *scrVisInfo;
+ int i;
+
+ DbeCheckExtension (dpy, info, (XdbeScreenVisualInfo *)NULL);
+
+ LockDisplay (dpy);
+
+ DbeGetReq(DbeGetVisualInfo, req, info);
+ req->length = 2 + *num_screens;
+ req->n = *num_screens;
+ Data32 (dpy, screen_specifiers, (*num_screens * sizeof (CARD32)));
+
+ if (!_XReply (dpy, (xReply *) &rep, 0, xFalse)) {
+ UnlockDisplay (dpy);
+ SyncHandle ();
+ return NULL;
+ }
+
+ /* return the number of screens actually found if we
+ * requested information about all screens (*num_screens == 0)
+ */
+ if (*num_screens == 0)
+ *num_screens = rep.m;
+
+ /* allocate list of visual information to be returned */
+ if (!(scrVisInfo =
+ (XdbeScreenVisualInfo *)Xmalloc(
+ (unsigned)(*num_screens * sizeof(XdbeScreenVisualInfo))))) {
+ UnlockDisplay (dpy);
+ SyncHandle ();
+ return NULL;
+ }
+
+ for (i = 0; i < *num_screens; i++)
+ {
+ int nbytes;
+ int j;
+ long c;
+
+ _XRead32 (dpy, &c, sizeof(CARD32));
+ scrVisInfo[i].count = c;
+
+ nbytes = scrVisInfo[i].count * sizeof(XdbeVisualInfo);
+
+ /* if we can not allocate the list of visual/depth info
+ * then free the lists that we already allocate as well
+ * as the visual info list itself
+ */
+ if (!(scrVisInfo[i].visinfo = (XdbeVisualInfo *)Xmalloc(
+ (unsigned)nbytes))) {
+ for (j = 0; j < i; j++) {
+ Xfree ((char *)scrVisInfo[j].visinfo);
+ }
+ Xfree ((char *)scrVisInfo);
+ UnlockDisplay (dpy);
+ SyncHandle ();
+ return NULL;
+ }
+
+ /* Read the visual info item into the wire structure. Then copy each
+ * element into the library structure. The element sizes and/or
+ * padding may be different in the two structures.
+ */
+ for (j = 0; j < scrVisInfo[i].count; j++) {
+ xDbeVisInfo xvi;
+
+ _XRead (dpy, (char *)&xvi, sizeof(xDbeVisInfo));
+ scrVisInfo[i].visinfo[j].visual = xvi.visualID;
+ scrVisInfo[i].visinfo[j].depth = xvi.depth;
+ scrVisInfo[i].visinfo[j].perflevel = xvi.perfLevel;
+ }
+
+ }
+
+ UnlockDisplay (dpy);
+ SyncHandle ();
+ return scrVisInfo;
+
+} /* XdbeGetVisualInfo() */
+
+
+/*
+ * XdbeFreeVisualInfo -
+ * This function frees the list of XdbeScreenVisualInfo returned by the
+ * function XdbeGetVisualInfo.
+ */
+void XdbeFreeVisualInfo(XdbeScreenVisualInfo *visual_info)
+{
+ if (visual_info == NULL) {
+ return;
+ }
+
+ if (visual_info->visinfo) {
+ XFree(visual_info->visinfo);
+ }
+
+ XFree(visual_info);
+}
+
+
+/*
+ * XdbeGetBackBufferAttributes -
+ * This function returns the attributes associated with the specified
+ * buffer.
+ */
+XdbeBackBufferAttributes *XdbeGetBackBufferAttributes(
+ Display *dpy,
+ XdbeBackBuffer buffer)
+{
+ XExtDisplayInfo *info = find_display(dpy);
+ register xDbeGetBackBufferAttributesReq *req;
+ xDbeGetBackBufferAttributesReply rep;
+ XdbeBackBufferAttributes *attr;
+
+ DbeCheckExtension(dpy, info, (XdbeBackBufferAttributes *)NULL);
+
+ if (!(attr =
+ (XdbeBackBufferAttributes *)Xmalloc(sizeof(XdbeBackBufferAttributes)))) {
+ return NULL;
+ }
+
+ LockDisplay(dpy);
+ DbeGetReq(DbeGetBackBufferAttributes, req, info);
+ req->buffer = buffer;
+
+ if (!_XReply (dpy, (xReply *) &rep, 0, xTrue)) {
+ UnlockDisplay (dpy);
+ SyncHandle ();
+ Xfree(attr);
+ return NULL;
+ }
+ attr->window = rep.attributes;
+
+ UnlockDisplay (dpy);
+ SyncHandle ();
+
+ return attr;
+}
+
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