XGetDCtl.c revision 37eb1ca1 
1/************************************************************
2
3Copyright 1989, 1998  The Open Group
4
5Permission to use, copy, modify, distribute, and sell this software and its
6documentation for any purpose is hereby granted without fee, provided that
7the above copyright notice appear in all copies and that both that
8copyright notice and this permission notice appear in supporting
9documentation.
10
11The above copyright notice and this permission notice shall be included in
12all copies or substantial portions of the Software.
13
14THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
17OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
18AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
19CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
20
21Except as contained in this notice, the name of The Open Group shall not be
22used in advertising or otherwise to promote the sale, use or other dealings
23in this Software without prior written authorization from The Open Group.
24
25Copyright 1989 by Hewlett-Packard Company, Palo Alto, California.
26
27			All Rights Reserved
28
29Permission to use, copy, modify, and distribute this software and its
30documentation for any purpose and without fee is hereby granted,
31provided that the above copyright notice appear in all copies and that
32both that copyright notice and this permission notice appear in
33supporting documentation, and that the name of Hewlett-Packard not be
34used in advertising or publicity pertaining to distribution of the
35software without specific, written prior permission.
36
37HEWLETT-PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
38ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
39HEWLETT-PACKARD BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
40ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
41WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
42ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
43SOFTWARE.
44
45********************************************************/
46
47/***********************************************************************
48 *
49 * XGetDeviceControl - get the Device control state of an extension device.
50 *
51 */
52
53#include <X11/extensions/XI.h>
54#include <X11/extensions/XIproto.h>
55#include <X11/Xlibint.h>
56#include <X11/Xlib.h>
57#include <X11/extensions/XInput.h>
58#include <X11/extensions/extutil.h>
59#include "XIint.h"
60
61XDeviceControl *
62XGetDeviceControl(
63    register Display	*dpy,
64    XDevice		*dev,
65    int			 control)
66{
67    int size = 0;
68    int nbytes, i;
69    XDeviceControl *Device = NULL;
70    XDeviceControl *Sav = NULL;
71    xDeviceState *d = NULL;
72    xDeviceState *sav = NULL;
73    xGetDeviceControlReq *req;
74    xGetDeviceControlReply rep;
75    XExtDisplayInfo *info = XInput_find_display(dpy);
76
77    LockDisplay(dpy);
78    if (_XiCheckExtInit(dpy, XInput_Add_XChangeDeviceControl, info) == -1)
79	return ((XDeviceControl *) NoSuchExtension);
80
81    GetReq(GetDeviceControl, req);
82    req->reqType = info->codes->major_opcode;
83    req->ReqType = X_GetDeviceControl;
84    req->deviceid = dev->device_id;
85    req->control = control;
86
87    if (!_XReply(dpy, (xReply *) & rep, 0, xFalse))
88	goto out;
89
90    if (rep.length > 0) {
91	nbytes = (long)rep.length << 2;
92	d = (xDeviceState *) Xmalloc((unsigned)nbytes);
93	if (!d) {
94	    _XEatData(dpy, (unsigned long)nbytes);
95	    goto out;
96	}
97	sav = d;
98	_XRead(dpy, (char *)d, nbytes);
99
100        /* In theory, we should just be able to use d->length to get the size.
101         * Turns out that a number of X servers (up to and including server
102         * 1.4) sent the wrong length value down the wire. So to not break
103         * apps that run against older servers, we have to calculate the size
104         * manually.
105         */
106	switch (d->control) {
107	case DEVICE_RESOLUTION:
108	{
109	    xDeviceResolutionState *r;
110
111	    r = (xDeviceResolutionState *) d;
112	    size += sizeof(XDeviceResolutionState) +
113		(3 * sizeof(int) * r->num_valuators);
114	    break;
115	}
116        case DEVICE_ABS_CALIB:
117        {
118            size += sizeof(XDeviceAbsCalibState);
119            break;
120        }
121        case DEVICE_ABS_AREA:
122        {
123            size += sizeof(XDeviceAbsAreaState);
124            break;
125        }
126        case DEVICE_CORE:
127        {
128            size += sizeof(XDeviceCoreState);
129            break;
130        }
131	default:
132	    size += d->length;
133	    break;
134	}
135
136	Device = (XDeviceControl *) Xmalloc((unsigned)size);
137	if (!Device)
138	    goto out;
139
140	Sav = Device;
141
142	d = sav;
143	switch (control) {
144	case DEVICE_RESOLUTION:
145	{
146	    int *iptr, *iptr2;
147	    xDeviceResolutionState *r;
148	    XDeviceResolutionState *R;
149
150	    r = (xDeviceResolutionState *) d;
151	    R = (XDeviceResolutionState *) Device;
152
153	    R->control = DEVICE_RESOLUTION;
154	    R->length = sizeof(XDeviceResolutionState);
155	    R->num_valuators = r->num_valuators;
156	    iptr = (int *)(R + 1);
157	    iptr2 = (int *)(r + 1);
158	    R->resolutions = iptr;
159	    R->min_resolutions = iptr + R->num_valuators;
160	    R->max_resolutions = iptr + (2 * R->num_valuators);
161	    for (i = 0; i < (3 * R->num_valuators); i++)
162		*iptr++ = *iptr2++;
163	    break;
164	}
165        case DEVICE_ABS_CALIB:
166        {
167            xDeviceAbsCalibState *c = (xDeviceAbsCalibState *) d;
168            XDeviceAbsCalibState *C = (XDeviceAbsCalibState *) Device;
169
170            C->control = DEVICE_ABS_CALIB;
171            C->length = sizeof(XDeviceAbsCalibState);
172            C->min_x = c->min_x;
173            C->max_x = c->max_x;
174            C->min_y = c->min_y;
175            C->max_y = c->max_y;
176            C->flip_x = c->flip_x;
177            C->flip_y = c->flip_y;
178            C->rotation = c->rotation;
179            C->button_threshold = c->button_threshold;
180
181            break;
182        }
183        case DEVICE_ABS_AREA:
184        {
185            xDeviceAbsAreaState *a = (xDeviceAbsAreaState *) d;
186            XDeviceAbsAreaState *A = (XDeviceAbsAreaState *) Device;
187
188            A->control = DEVICE_ABS_AREA;
189            A->length = sizeof(XDeviceAbsAreaState);
190            A->offset_x = a->offset_x;
191            A->offset_y = a->offset_y;
192            A->width = a->width;
193            A->height = a->height;
194            A->screen = a->screen;
195            A->following = a->following;
196
197            break;
198        }
199        case DEVICE_CORE:
200        {
201            xDeviceCoreState *c = (xDeviceCoreState *) d;
202            XDeviceCoreState *C = (XDeviceCoreState *) Device;
203
204            C->control = DEVICE_CORE;
205            C->length = sizeof(XDeviceCoreState);
206            C->status = c->status;
207            C->iscore = c->iscore;
208
209            break;
210        }
211        case DEVICE_ENABLE:
212        {
213            xDeviceEnableState *e = (xDeviceEnableState *) d;
214            XDeviceEnableState *E = (XDeviceEnableState *) Device;
215
216            E->control = DEVICE_ENABLE;
217            E->length = sizeof(E);
218            E->enable = e->enable;
219
220            break;
221        }
222	default:
223	    break;
224	}
225    }
226out:
227    XFree(sav);
228
229    UnlockDisplay(dpy);
230    SyncHandle();
231    return (Sav);
232}
233
234void
235XFreeDeviceControl(XDeviceControl *control)
236{
237    XFree(control);
238}
239