diff options
Diffstat (limited to 'libXext/src/Xdbe.c')
| -rw-r--r-- | libXext/src/Xdbe.c | 936 |
1 files changed, 468 insertions, 468 deletions
diff --git a/libXext/src/Xdbe.c b/libXext/src/Xdbe.c index 930b51f60..1b9e2da52 100644 --- a/libXext/src/Xdbe.c +++ b/libXext/src/Xdbe.c @@ -1,468 +1,468 @@ -/******************************************************************************
- *
- * 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
- *
- *****************************************************************************/
-
-#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;
-}
-
+/****************************************************************************** + * + * 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 + * + *****************************************************************************/ + +#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; +} + |