XrrOutput.c revision 8c4a8e55 
1/*
2 * Copyright © 2006 Keith Packard
3 * Copyright © 2008 Red Hat, Inc.
4 *
5 * Permission to use, copy, modify, distribute, and sell this software and its
6 * documentation for any purpose is hereby granted without fee, provided that
7 * the above copyright notice appear in all copies and that both that copyright
8 * notice and this permission notice appear in supporting documentation, and
9 * that the name of the copyright holders not be used in advertising or
10 * publicity pertaining to distribution of the software without specific,
11 * written prior permission.  The copyright holders make no representations
12 * about the suitability of this software for any purpose.  It is provided "as
13 * is" without express or implied warranty.
14 *
15 * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
16 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
17 * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
18 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
19 * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
20 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
21 * OF THIS SOFTWARE.
22 */
23
24#ifdef HAVE_CONFIG_H
25#include <config.h>
26#endif
27
28#include <stdio.h>
29#include <X11/Xlib.h>
30/* we need to be able to manipulate the Display structure on events */
31#include <X11/Xlibint.h>
32#include <X11/extensions/render.h>
33#include <X11/extensions/Xrender.h>
34#include "Xrandrint.h"
35
36#define OutputInfoExtra	(SIZEOF(xRRGetOutputInfoReply) - 32)
37
38XRROutputInfo *
39XRRGetOutputInfo (Display *dpy, XRRScreenResources *resources, RROutput output)
40{
41    XExtDisplayInfo		*info = XRRFindDisplay(dpy);
42    xRRGetOutputInfoReply	rep;
43    xRRGetOutputInfoReq		*req;
44    int				nbytes, nbytesRead, rbytes;
45    XRROutputInfo		*xoi;
46
47    RRCheckExtension (dpy, info, NULL);
48
49    LockDisplay (dpy);
50    GetReq (RRGetOutputInfo, req);
51    req->reqType = info->codes->major_opcode;
52    req->randrReqType = X_RRGetOutputInfo;
53    req->output = output;
54    req->configTimestamp = resources->configTimestamp;
55
56    if (!_XReply (dpy, (xReply *) &rep, OutputInfoExtra >> 2, xFalse))
57    {
58	UnlockDisplay (dpy);
59	SyncHandle ();
60	return NULL;
61    }
62
63    nbytes = ((long) (rep.length) << 2) - OutputInfoExtra;
64
65    nbytesRead = (long) (rep.nCrtcs * 4 +
66			 rep.nModes * 4 +
67			 rep.nClones * 4 +
68			 ((rep.nameLength + 3) & ~3));
69
70    /*
71     * first we must compute how much space to allocate for
72     * randr library's use; we'll allocate the structures in a single
73     * allocation, on cleanlyness grounds.
74     */
75
76    rbytes = (sizeof (XRROutputInfo) +
77	      rep.nCrtcs * sizeof (RRCrtc) +
78	      rep.nModes * sizeof (RRMode) +
79	      rep.nClones * sizeof (RROutput) +
80	      rep.nameLength + 1);	    /* '\0' terminate name */
81
82    xoi = (XRROutputInfo *) Xmalloc(rbytes);
83    if (xoi == NULL) {
84	_XEatData (dpy, (unsigned long) nbytes);
85	UnlockDisplay (dpy);
86	SyncHandle ();
87	return NULL;
88    }
89
90    xoi->timestamp = rep.timestamp;
91    xoi->crtc = rep.crtc;
92    xoi->mm_width = rep.mmWidth;
93    xoi->mm_height = rep.mmHeight;
94    xoi->connection = rep.connection;
95    xoi->subpixel_order = rep.subpixelOrder;
96    xoi->ncrtc = rep.nCrtcs;
97    xoi->crtcs = (RRCrtc *) (xoi + 1);
98    xoi->nmode = rep.nModes;
99    xoi->npreferred = rep.nPreferred;
100    xoi->modes = (RRMode *) (xoi->crtcs + rep.nCrtcs);
101    xoi->nclone = rep.nClones;
102    xoi->clones = (RROutput *) (xoi->modes + rep.nModes);
103    xoi->name = (char *) (xoi->clones + rep.nClones);
104
105    _XRead32 (dpy, xoi->crtcs, rep.nCrtcs << 2);
106    _XRead32 (dpy, xoi->modes, rep.nModes << 2);
107    _XRead32 (dpy, xoi->clones, rep.nClones << 2);
108
109    /*
110     * Read name and '\0' terminate
111     */
112    _XReadPad (dpy, xoi->name, rep.nameLength);
113    xoi->name[rep.nameLength] = '\0';
114
115    /*
116     * Skip any extra data
117     */
118    if (nbytes > nbytesRead)
119	_XEatData (dpy, (unsigned long) (nbytes - nbytesRead));
120
121    UnlockDisplay (dpy);
122    SyncHandle ();
123    return (XRROutputInfo *) xoi;
124}
125
126void
127XRRFreeOutputInfo (XRROutputInfo *outputInfo)
128{
129    Xfree (outputInfo);
130}
131
132static Bool
133_XRRHasOutputPrimary (int major, int minor)
134{
135    return major > 1 || (major == 1 && minor >= 3);
136}
137
138void
139XRRSetOutputPrimary(Display *dpy, Window window, RROutput output)
140{
141    XExtDisplayInfo	    *info = XRRFindDisplay(dpy);
142    xRRSetOutputPrimaryReq  *req;
143    int			    major_version, minor_version;
144
145    RRSimpleCheckExtension (dpy, info);
146
147    if (!XRRQueryVersion (dpy, &major_version, &minor_version) ||
148	!_XRRHasOutputPrimary (major_version, minor_version))
149	return;
150
151    LockDisplay(dpy);
152    GetReq (RRSetOutputPrimary, req);
153    req->reqType       = info->codes->major_opcode;
154    req->randrReqType  = X_RRSetOutputPrimary;
155    req->window        = window;
156    req->output	       = output;
157
158    UnlockDisplay (dpy);
159    SyncHandle ();
160}
161
162RROutput
163XRRGetOutputPrimary(Display *dpy, Window window)
164{
165    XExtDisplayInfo	    *info = XRRFindDisplay(dpy);
166    xRRGetOutputPrimaryReq  *req;
167    xRRGetOutputPrimaryReply rep;
168    int			    major_version, minor_version;
169
170    RRCheckExtension (dpy, info, 0);
171
172    if (!XRRQueryVersion (dpy, &major_version, &minor_version) ||
173	!_XRRHasOutputPrimary (major_version, minor_version))
174	return None;
175
176    LockDisplay(dpy);
177    GetReq (RRGetOutputPrimary, req);
178    req->reqType	= info->codes->major_opcode;
179    req->randrReqType	= X_RRGetOutputPrimary;
180    req->window		= window;
181
182    if (!_XReply (dpy, (xReply *) &rep, 0, xFalse))
183	rep.output = None;
184
185    UnlockDisplay(dpy);
186    SyncHandle();
187
188    return rep.output;
189}
190