XEVI.c revision 5d8688b9 
1/************************************************************
2Copyright (c) 1997 by Silicon Graphics Computer Systems, Inc.
3Permission to use, copy, modify, and distribute this
4software and its documentation for any purpose and without
5fee is hereby granted, provided that the above copyright
6notice appear in all copies and that both that copyright
7notice and this permission notice appear in supporting
8documentation, and that the name of Silicon Graphics not be
9used in advertising or publicity pertaining to distribution
10of the software without specific prior written permission.
11Silicon Graphics makes no representation about the suitability
12of this software for any purpose. It is provided "as is"
13without any express or implied warranty.
14SILICON GRAPHICS DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS
15SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
16AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL SILICON
17GRAPHICS BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL
18DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
19DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
20OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION  WITH
21THE USE OR PERFORMANCE OF THIS SOFTWARE.
22********************************************************/
23
24#ifdef HAVE_CONFIG_H
25#include <config.h>
26#endif
27#include <X11/Xlibint.h>
28#include <X11/extensions/XEVI.h>
29#include <X11/extensions/EVIproto.h>
30#include <X11/extensions/Xext.h>
31#include <X11/extensions/extutil.h>
32#include <X11/Xutil.h>
33#include <limits.h>
34#include "reallocarray.h"
35
36static XExtensionInfo *xevi_info;/* needs to move to globals.c */
37static const char *xevi_extension_name = EVINAME;
38#define XeviCheckExtension(dpy,i,val) \
39  XextCheckExtension (dpy, i, xevi_extension_name, val)
40/*****************************************************************************
41 *                                                                           *
42 *			   private utility routines                          *
43 *                                                                           *
44 *****************************************************************************/
45static /* const */ XExtensionHooks xevi_extension_hooks = {
46    NULL,			/* create_gc */
47    NULL,			/* copy_gc */
48    NULL,			/* flush_gc */
49    NULL,			/* free_gc */
50    NULL,			/* create_font */
51    NULL,			/* free_font */
52    NULL,			/* close_display */
53    NULL,			/* wire_to_event */
54    NULL,			/* event_to_wire */
55    NULL,			/* error */
56    NULL,			/* error_string */
57};
58static XEXT_GENERATE_FIND_DISPLAY (find_display, xevi_info,
59                                   xevi_extension_name,
60                                   &xevi_extension_hooks, 0, NULL)
61Bool XeviQueryExtension (Display *dpy)
62{
63    XExtDisplayInfo *info = find_display (dpy);
64    if (XextHasExtension(info)) {
65	return True;
66    } else {
67	return False;
68    }
69}
70Bool XeviQueryVersion(Display *dpy, int *majorVersion, int *minorVersion)
71{
72    XExtDisplayInfo *info = find_display (dpy);
73    xEVIQueryVersionReply rep;
74    register xEVIQueryVersionReq *req;
75    XeviCheckExtension (dpy, info, False);
76    LockDisplay(dpy);
77    GetReq(EVIQueryVersion, req);
78    req->reqType = info->codes->major_opcode;
79    req->xeviReqType = X_EVIQueryVersion;
80    if (!_XReply(dpy, (xReply *)&rep, 0, xFalse)) {
81	UnlockDisplay(dpy);
82	SyncHandle();
83	return False;
84    }
85    *majorVersion = rep.majorVersion;
86    *minorVersion = rep.minorVersion;
87    UnlockDisplay(dpy);
88    SyncHandle();
89    return True;
90}
91static Bool notInList(VisualID32 *visual, int sz_visual, VisualID newVisualid)
92{
93    while  (sz_visual-- > 0)  {
94	if (*visual == newVisualid)
95	    return False;
96	visual++;
97    }
98    return True;
99}
100Status XeviGetVisualInfo(
101    register Display *dpy,
102    VisualID *visual,
103    int n_visual,
104    ExtendedVisualInfo **evi_return,
105    int *n_info_return)
106{
107    XExtDisplayInfo *info = find_display (dpy);
108    register xEVIGetVisualInfoReq *req;
109    xEVIGetVisualInfoReply rep;
110    int sz_info, sz_xInfo, sz_conflict, sz_xConflict;
111    VisualID32 *temp_conflict, *temp_visual, *xConflictPtr;
112    VisualID *conflict;
113    xExtendedVisualInfo *temp_xInfo;
114    XVisualInfo *vinfo;
115    register ExtendedVisualInfo *infoPtr;
116    register xExtendedVisualInfo *xInfoPtr;
117    register int n_data, visualIndex, vinfoIndex;
118    Bool isValid;
119    XeviCheckExtension (dpy, info, 0);
120    if (!n_info_return || !evi_return) {
121	return BadValue;
122    }
123    *n_info_return = 0;
124    *evi_return = NULL;
125    vinfo = XGetVisualInfo(dpy, 0, NULL, &sz_info);
126    if (!vinfo) {
127	return BadValue;
128    }
129    if (!n_visual || !visual) {		/* copy the all visual */
130	temp_visual = Xcalloc(sz_info, sz_VisualID32);
131    	n_visual = 0;
132        for (vinfoIndex = 0; vinfoIndex < sz_info; vinfoIndex++)
133	    if (notInList(temp_visual, n_visual, vinfo[vinfoIndex].visualid))
134	        temp_visual[n_visual++] = vinfo[vinfoIndex].visualid;
135    }
136    else {	/* check if the visual is valid */
137	if (n_visual > 65536)
138		n_visual = 65536;
139        for (visualIndex = 0; visualIndex < n_visual; visualIndex++) {
140	    isValid = False;
141            for (vinfoIndex = 0; vinfoIndex < sz_info; vinfoIndex++) {
142	        if (visual[visualIndex] == vinfo[vinfoIndex].visualid) {
143		    isValid = True;
144		    break;
145	        }
146	    }
147	    if (!isValid) {
148		XFree(vinfo);
149	        return BadValue;
150	    }
151	}
152	temp_visual = Xmallocarray(n_visual, sz_VisualID32);
153        for (visualIndex = 0; visualIndex < n_visual; visualIndex++)
154	    temp_visual[visualIndex] = visual[visualIndex];
155    }
156    XFree(vinfo);
157    LockDisplay(dpy);
158    GetReq(EVIGetVisualInfo, req);
159    req->reqType = info->codes->major_opcode;
160    req->xeviReqType = X_EVIGetVisualInfo;
161    req->n_visual = n_visual;
162    SetReqLen(req, n_visual, 1);
163    Data(dpy, (char *)temp_visual, n_visual * sz_VisualID32);
164    if (!_XReply(dpy, (xReply *)&rep, 0, xFalse)) {
165	UnlockDisplay(dpy);
166	SyncHandle();
167	Xfree(temp_visual);
168	return BadAccess;
169    }
170    Xfree(temp_visual);
171    if ((rep.n_info < 65536) && (rep.n_conflicts < 65536)) {
172	sz_info = rep.n_info * sizeof(ExtendedVisualInfo);
173	sz_xInfo = rep.n_info * sz_xExtendedVisualInfo;
174	sz_conflict = rep.n_conflicts * sizeof(VisualID);
175	sz_xConflict = rep.n_conflicts * sz_VisualID32;
176	*evi_return = Xcalloc(1, sz_info + sz_conflict);
177	temp_xInfo = Xmalloc(sz_xInfo);
178	temp_conflict = Xmalloc(sz_xConflict);
179    } else {
180	sz_xInfo = sz_xConflict = 0;
181	*evi_return = NULL;
182	temp_xInfo = NULL;
183	temp_conflict = NULL;
184    }
185    if (!*evi_return || !temp_xInfo || !temp_conflict) {
186	_XEatDataWords(dpy, rep.length);
187	UnlockDisplay(dpy);
188	SyncHandle();
189	if (*evi_return) {
190	   Xfree(*evi_return);
191	   *evi_return = NULL;
192	}
193	if (temp_xInfo)
194	   Xfree(temp_xInfo);
195	if (temp_conflict)
196	   Xfree(temp_conflict);
197	return BadAlloc;
198    }
199    _XRead(dpy, (char *)temp_xInfo, sz_xInfo);
200    _XRead(dpy, (char *)temp_conflict, sz_xConflict);
201    UnlockDisplay(dpy);
202    SyncHandle();
203    infoPtr = *evi_return;
204    xInfoPtr = temp_xInfo;
205    xConflictPtr = temp_conflict;
206    n_data = rep.n_info;
207    conflict = (VisualID *)(infoPtr + n_data);
208    while (n_data-- > 0) {
209	infoPtr->core_visual_id		= xInfoPtr->core_visual_id;
210	infoPtr->screen			= xInfoPtr->screen;
211	infoPtr->level			= xInfoPtr->level;
212	infoPtr->transparency_type	= xInfoPtr->transparency_type;
213	infoPtr->transparency_value	= xInfoPtr->transparency_value;
214	infoPtr->min_hw_colormaps	= xInfoPtr->min_hw_colormaps;
215	infoPtr->max_hw_colormaps	= xInfoPtr->max_hw_colormaps;
216	infoPtr->num_colormap_conflicts = xInfoPtr->num_colormap_conflicts;
217	infoPtr->colormap_conflicts	= conflict;
218	conflict += infoPtr->num_colormap_conflicts;
219	infoPtr++;
220	xInfoPtr++;
221    }
222    n_data = rep.n_conflicts;
223    conflict = (VisualID *)(infoPtr);
224    while (n_data-- > 0)
225       *conflict++ = *xConflictPtr++;
226    Xfree(temp_xInfo);
227    Xfree(temp_conflict);
228    *n_info_return = rep.n_info;
229    return Success;
230}
231