aboutsummaryrefslogtreecommitdiff
path: root/nx-X11/programs/Xserver/randr/rrmode.c.X.original
blob: d5072084a6fbc879f5a3e51faa65543c160b7563 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
/*
 * Copyright © 2006 Keith Packard
 *
 * Permission to use, copy, modify, distribute, and sell this software and its
 * documentation for any purpose is hereby granted without fee, provided that
 * the above copyright notice appear in all copies and that both that copyright
 * notice and this permission notice appear in supporting documentation, and
 * that the name of the copyright holders not be used in advertising or
 * publicity pertaining to distribution of the software without specific,
 * written prior permission.  The copyright holders make no representations
 * about the suitability of this software for any purpose.  It is provided "as
 * is" without express or implied warranty.
 *
 * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
 * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
 * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
 * OF THIS SOFTWARE.
 */

#include "randrstr.h"
#include "registry.h"

RESTYPE	RRModeType;

static Bool
RRModeEqual (xRRModeInfo *a, xRRModeInfo *b)
{
    if (a->width != b->width) return FALSE;
    if (a->height != b->height) return FALSE;
    if (a->dotClock != b->dotClock) return FALSE;
    if (a->hSyncStart != b->hSyncStart) return FALSE;
    if (a->hSyncEnd != b->hSyncEnd) return FALSE;
    if (a->hTotal != b->hTotal) return FALSE;
    if (a->hSkew != b->hSkew) return FALSE;
    if (a->vSyncStart != b->vSyncStart) return FALSE;
    if (a->vSyncEnd != b->vSyncEnd) return FALSE;
    if (a->vTotal != b->vTotal) return FALSE;
    if (a->nameLength != b->nameLength) return FALSE;
    if (a->modeFlags != b->modeFlags) return FALSE;
    return TRUE;
}

/*
 * Keep a list so it's easy to find modes in the resource database.
 */
static int	    num_modes;
static RRModePtr    *modes;

static RRModePtr
RRModeCreate (xRRModeInfo   *modeInfo,
	      const char    *name,
	      ScreenPtr	    userScreen)
{
    RRModePtr	mode, *newModes;
    
    if (!RRInit ())
	return NULL;

    mode = xalloc (sizeof (RRModeRec) + modeInfo->nameLength + 1);
    if (!mode)
	return NULL;
    mode->refcnt = 1;
    mode->mode = *modeInfo;
    mode->name = (char *) (mode + 1);
    memcpy (mode->name, name, modeInfo->nameLength);
    mode->name[modeInfo->nameLength] = '\0';
    mode->userScreen = userScreen;

    if (num_modes)
	newModes = xrealloc (modes, (num_modes + 1) * sizeof (RRModePtr));
    else
	newModes = xalloc (sizeof (RRModePtr));

    if (!newModes)
    {
	xfree (mode);
	return NULL;
    }

    mode->mode.id = FakeClientID(0);
    if (!AddResource (mode->mode.id, RRModeType, (pointer) mode))
	return NULL;
    modes = newModes;
    modes[num_modes++] = mode;
    
    /*
     * give the caller a reference to this mode
     */
    ++mode->refcnt;
    return mode;
}

static RRModePtr
RRModeFindByName (const char	*name,
		  CARD16    	nameLength)
{
    int		i;
    RRModePtr	mode;

    for (i = 0; i < num_modes; i++)
    {
	mode = modes[i];
	if (mode->mode.nameLength == nameLength &&
	    !memcmp (name, mode->name, nameLength))
	{
	    return mode;
	}
    }
    return NULL;
}

RRModePtr
RRModeGet (xRRModeInfo	*modeInfo,
	   const char	*name)
{
    int	i;

    for (i = 0; i < num_modes; i++)
    {
	RRModePtr   mode = modes[i];
	if (RRModeEqual (&mode->mode, modeInfo) &&
	    !memcmp (name, mode->name, modeInfo->nameLength))
	{
	    ++mode->refcnt;
	    return mode;
	}
    }

    return RRModeCreate (modeInfo, name, NULL);
}

static RRModePtr
RRModeCreateUser (ScreenPtr	pScreen,
		  xRRModeInfo	*modeInfo,
		  const char	*name,
		  int		*error)
{
    RRModePtr	mode;

    mode = RRModeFindByName (name, modeInfo->nameLength);
    if (mode)
    {
	*error = BadName;
	return NULL;
    }
    
    mode = RRModeCreate (modeInfo, name, pScreen);
    if (!mode)
    {
	*error = BadAlloc;
	return NULL;
    }
    *error = Success;
    return mode;
}

RRModePtr *
RRModesForScreen (ScreenPtr pScreen, int *num_ret)
{
    rrScrPriv(pScreen);
    int		o, c, m;
    RRModePtr	*screen_modes;
    int		num_screen_modes = 0;

    screen_modes = xalloc ((num_modes ? num_modes : 1) * sizeof (RRModePtr));
    if (!screen_modes)
	return NULL;
    
    /*
     * Add modes from all outputs
     */
    for (o = 0; o < pScrPriv->numOutputs; o++)
    {
	RROutputPtr	output = pScrPriv->outputs[o];
	int		m, n;

	for (m = 0; m < output->numModes + output->numUserModes; m++)
	{
	    RRModePtr   mode = (m < output->numModes ? 
				output->modes[m] : 
				output->userModes[m-output->numModes]);
	    for (n = 0; n < num_screen_modes; n++)
		if (screen_modes[n] == mode)
		    break;
	    if (n == num_screen_modes)
		screen_modes[num_screen_modes++] = mode;
	}
    }
    /*
     * Add modes from all crtcs. The goal is to
     * make sure all available and active modes
     * are visible to the client
     */
    for (c = 0; c < pScrPriv->numCrtcs; c++)
    {
	RRCrtcPtr	crtc = pScrPriv->crtcs[c];
	RRModePtr	mode = crtc->mode;
	int		n;

	if (!mode) continue;
	for (n = 0; n < num_screen_modes; n++)
	    if (screen_modes[n] == mode)
		break;
	if (n == num_screen_modes)
	    screen_modes[num_screen_modes++] = mode;
    }
    /*
     * Add all user modes for this screen
     */
    for (m = 0; m < num_modes; m++)
    {
	RRModePtr	mode = modes[m];
	int		n;

	if (mode->userScreen != pScreen)
	    continue;
	for (n = 0; n < num_screen_modes; n++)
	    if (screen_modes[n] == mode)
		break;
	if (n == num_screen_modes)
	    screen_modes[num_screen_modes++] = mode;
    }
    
    *num_ret = num_screen_modes;
    return screen_modes;
}

void
RRModeDestroy (RRModePtr mode)
{
    int	m;
    
    if (--mode->refcnt > 0)
	return;
    for (m = 0; m < num_modes; m++)
    {
	if (modes[m] == mode)
	{
	    memmove (modes + m, modes + m + 1,
		     (num_modes - m - 1) * sizeof (RRModePtr));
	    num_modes--;
	    if (!num_modes)
	    {
		xfree (modes);
		modes = NULL;
	    }
	    break;
	}
    }
    
    xfree (mode);
}

static int
RRModeDestroyResource (pointer value, XID pid)
{
    RRModeDestroy ((RRModePtr) value);
    return 1;
}

Bool
RRModeInit (void)
{
    assert (num_modes == 0);
    assert (modes == NULL);
    RRModeType = CreateNewResourceType (RRModeDestroyResource);
    if (!RRModeType)
	return FALSE;
    RegisterResourceName (RRModeType, "MODE");
    return TRUE;
}

int
ProcRRCreateMode (ClientPtr client)
{
    REQUEST(xRRCreateModeReq);
    xRRCreateModeReply	rep;
    WindowPtr		pWin;
    ScreenPtr		pScreen;
    rrScrPrivPtr	pScrPriv;
    xRRModeInfo		*modeInfo;
    long		units_after;
    char		*name;
    int			error, rc;
    RRModePtr		mode;
    
    REQUEST_AT_LEAST_SIZE (xRRCreateModeReq);
    rc = dixLookupWindow(&pWin, stuff->window, client, DixReadAccess);
    if (rc != Success)
	return rc;

    pScreen = pWin->drawable.pScreen;
    pScrPriv = rrGetScrPriv(pScreen);
    
    modeInfo = &stuff->modeInfo;
    name = (char *) (stuff + 1);
    units_after = (stuff->length - (sizeof (xRRCreateModeReq) >> 2));

    /* check to make sure requested name fits within the data provided */
    if ((int) (modeInfo->nameLength + 3) >> 2 > units_after)
	return BadLength;

    mode = RRModeCreateUser (pScreen, modeInfo, name, &error);
    if (!mode)
	return error;

    rep.type = X_Reply;
    rep.pad0 = 0;
    rep.sequenceNumber = client->sequence;
    rep.length = 0;
    rep.mode = mode->mode.id;
    if (client->swapped)
    {
	int n;
    	swaps(&rep.sequenceNumber, n);
    	swapl(&rep.length, n);
	swapl(&rep.mode, n);
    }
    WriteToClient(client, sizeof(xRRCreateModeReply), (char *)&rep);
    
    return client->noClientException;
}

int
ProcRRDestroyMode (ClientPtr client)
{
    REQUEST(xRRDestroyModeReq);
    RRModePtr	mode;
    
    REQUEST_SIZE_MATCH(xRRDestroyModeReq);
    mode = LookupIDByType (stuff->mode, RRModeType);
    if (!mode)
    {
	client->errorValue = stuff->mode;
	return RRErrorBase + BadRRMode;
    }
    if (!mode->userScreen)
	return BadMatch;
    if (mode->refcnt > 1)
	return BadAccess;
    FreeResource (stuff->mode, 0);
    return Success;
}

int
ProcRRAddOutputMode (ClientPtr client)
{
    REQUEST(xRRAddOutputModeReq);
    RRModePtr	mode;
    RROutputPtr	output;
    
    REQUEST_SIZE_MATCH(xRRAddOutputModeReq);
    output = LookupOutput(client, stuff->output, DixReadAccess);

    if (!output)
    {
	client->errorValue = stuff->output;
	return RRErrorBase + BadRROutput;
    }
    
    mode = LookupIDByType (stuff->mode, RRModeType);
    if (!mode)
    {
	client->errorValue = stuff->mode;
	return RRErrorBase + BadRRMode;
    }
    
    return RROutputAddUserMode (output, mode);
}

int
ProcRRDeleteOutputMode (ClientPtr client)
{
    REQUEST(xRRDeleteOutputModeReq);
    RRModePtr	mode;
    RROutputPtr	output;
    
    REQUEST_SIZE_MATCH(xRRDeleteOutputModeReq);
    output = LookupOutput(client, stuff->output, DixReadAccess);

    if (!output)
    {
	client->errorValue = stuff->output;
	return RRErrorBase + BadRROutput;
    }
    
    mode = LookupIDByType (stuff->mode, RRModeType);
    if (!mode)
    {
	client->errorValue = stuff->mode;
	return RRErrorBase + BadRRMode;
    }
    
    return RROutputDeleteUserMode (output, mode);
}