summaryrefslogtreecommitdiff
path: root/render/animcur.c
blob: 038c5b9be20cba98e8628f7d8ed3430ec9315001 (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
/*
 *
 * Copyright © 2002 Keith Packard, member of The XFree86 Project, Inc.
 *
 * 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 Keith Packard not be used in
 * advertising or publicity pertaining to distribution of the software without
 * specific, written prior permission.  Keith Packard makes no
 * representations about the suitability of this software for any purpose.  It
 * is provided "as is" without express or implied warranty.
 *
 * KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
 * EVENT SHALL KEITH PACKARD 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.
 */

/*
 * Animated cursors for X.  Not specific to Render in any way, but
 * stuck there because Render has the other cool cursor extension.
 * Besides, everyone has Render.
 *
 * Implemented as a simple layer over the core cursor code; it
 * creates composite cursors out of a set of static cursors and
 * delta times between each image.
 */

#ifdef HAVE_DIX_CONFIG_H
#include <dix-config.h>
#endif

#include <X11/X.h>
#include <X11/Xmd.h>
#include "servermd.h"
#include "scrnintstr.h"
#include "dixstruct.h"
#include "cursorstr.h"
#include "dixfontstr.h"
#include "opaque.h"
#include "picturestr.h"
#include "inputstr.h"
#include "xace.h"

typedef struct _AnimCurElt {
    CursorPtr pCursor;          /* cursor to show */
    CARD32 delay;               /* in ms */
} AnimCurElt;

typedef struct _AnimCur {
    int nelt;                   /* number of elements in the elts array */
    AnimCurElt *elts;           /* actually allocated right after the structure */
} AnimCurRec, *AnimCurPtr;

typedef struct _AnimScrPriv {
    CloseScreenProcPtr CloseScreen;

    ScreenBlockHandlerProcPtr BlockHandler;

    CursorLimitsProcPtr CursorLimits;
    DisplayCursorProcPtr DisplayCursor;
    SetCursorPositionProcPtr SetCursorPosition;
    RealizeCursorProcPtr RealizeCursor;
    UnrealizeCursorProcPtr UnrealizeCursor;
    RecolorCursorProcPtr RecolorCursor;
} AnimCurScreenRec, *AnimCurScreenPtr;

static unsigned char empty[4];

static CursorBits animCursorBits = {
    empty, empty, 2, 1, 1, 0, 0, 1
};

static DevPrivateKeyRec AnimCurScreenPrivateKeyRec;

#define AnimCurScreenPrivateKey (&AnimCurScreenPrivateKeyRec)

#define IsAnimCur(c)	    ((c) && ((c)->bits == &animCursorBits))
#define GetAnimCur(c)	    ((AnimCurPtr) ((((char *)(c) + CURSOR_REC_SIZE))))
#define GetAnimCurScreen(s) ((AnimCurScreenPtr)dixLookupPrivate(&(s)->devPrivates, AnimCurScreenPrivateKey))
#define SetAnimCurScreen(s,p) dixSetPrivate(&(s)->devPrivates, AnimCurScreenPrivateKey, p)

#define Wrap(as,s,elt,func) (((as)->elt = (s)->elt), (s)->elt = func)
#define Unwrap(as,s,elt)    ((s)->elt = (as)->elt)

static Bool
AnimCurCloseScreen(ScreenPtr pScreen)
{
    AnimCurScreenPtr as = GetAnimCurScreen(pScreen);
    Bool ret;

    Unwrap(as, pScreen, CloseScreen);

    Unwrap(as, pScreen, CursorLimits);
    Unwrap(as, pScreen, DisplayCursor);
    Unwrap(as, pScreen, SetCursorPosition);
    Unwrap(as, pScreen, RealizeCursor);
    Unwrap(as, pScreen, UnrealizeCursor);
    Unwrap(as, pScreen, RecolorCursor);
    SetAnimCurScreen(pScreen, 0);
    ret = (*pScreen->CloseScreen) (pScreen);
    free(as);
    return ret;
}

static void
AnimCurCursorLimits(DeviceIntPtr pDev,
                    ScreenPtr pScreen,
                    CursorPtr pCursor, BoxPtr pHotBox, BoxPtr pTopLeftBox)
{
    AnimCurScreenPtr as = GetAnimCurScreen(pScreen);

    Unwrap(as, pScreen, CursorLimits);
    if (IsAnimCur(pCursor)) {
        AnimCurPtr ac = GetAnimCur(pCursor);

        (*pScreen->CursorLimits) (pDev, pScreen, ac->elts[0].pCursor,
                                  pHotBox, pTopLeftBox);
    }
    else {
        (*pScreen->CursorLimits) (pDev, pScreen, pCursor, pHotBox, pTopLeftBox);
    }
    Wrap(as, pScreen, CursorLimits, AnimCurCursorLimits);
}

/*
 * This has to be a screen block handler instead of a generic
 * block handler so that it is well ordered with respect to the DRI
 * block handler responsible for releasing the hardware to DRI clients
 */

static void
AnimCurScreenBlockHandler(ScreenPtr pScreen,
                          pointer pTimeout, pointer pReadmask)
{
    AnimCurScreenPtr as = GetAnimCurScreen(pScreen);
    DeviceIntPtr dev;
    Bool activeDevice = FALSE;
    CARD32 now = 0, soonest = ~0;       /* earliest time to wakeup again */

    Unwrap(as, pScreen, BlockHandler);

    for (dev = inputInfo.devices; dev; dev = dev->next) {
        if (IsPointerDevice(dev) && pScreen == dev->spriteInfo->anim.pScreen) {
            if (!activeDevice) {
                now = GetTimeInMillis();
                activeDevice = TRUE;
            }

            if ((INT32) (now - dev->spriteInfo->anim.time) >= 0) {
                AnimCurPtr ac = GetAnimCur(dev->spriteInfo->anim.pCursor);
                int elt = (dev->spriteInfo->anim.elt + 1) % ac->nelt;
                DisplayCursorProcPtr DisplayCursor;

                /*
                 * Not a simple Unwrap/Wrap as this
                 * isn't called along the DisplayCursor 
                 * wrapper chain.
                 */
                DisplayCursor = pScreen->DisplayCursor;
                pScreen->DisplayCursor = as->DisplayCursor;
                (void) (*pScreen->DisplayCursor) (dev,
                                                  pScreen,
                                                  ac->elts[elt].pCursor);
                as->DisplayCursor = pScreen->DisplayCursor;
                pScreen->DisplayCursor = DisplayCursor;

                dev->spriteInfo->anim.elt = elt;
                dev->spriteInfo->anim.time = now + ac->elts[elt].delay;
            }

            if (soonest > dev->spriteInfo->anim.time)
                soonest = dev->spriteInfo->anim.time;
        }
    }

    if (activeDevice)
        AdjustWaitForDelay(pTimeout, soonest - now);

    (*pScreen->BlockHandler) (pScreen, pTimeout, pReadmask);
    if (activeDevice)
        Wrap(as, pScreen, BlockHandler, AnimCurScreenBlockHandler);
    else
        as->BlockHandler = NULL;
}

static Bool
AnimCurDisplayCursor(DeviceIntPtr pDev, ScreenPtr pScreen, CursorPtr pCursor)
{
    AnimCurScreenPtr as = GetAnimCurScreen(pScreen);
    Bool ret;

    if (IsFloating(pDev))
        return FALSE;

    Unwrap(as, pScreen, DisplayCursor);
    if (IsAnimCur(pCursor)) {
        if (pCursor != pDev->spriteInfo->anim.pCursor) {
            AnimCurPtr ac = GetAnimCur(pCursor);

            ret = (*pScreen->DisplayCursor)
                (pDev, pScreen, ac->elts[0].pCursor);
            if (ret) {
                pDev->spriteInfo->anim.elt = 0;
                pDev->spriteInfo->anim.time =
                    GetTimeInMillis() + ac->elts[0].delay;
                pDev->spriteInfo->anim.pCursor = pCursor;
                pDev->spriteInfo->anim.pScreen = pScreen;

                if (!as->BlockHandler)
                    Wrap(as, pScreen, BlockHandler, AnimCurScreenBlockHandler);
            }
        }
        else
            ret = TRUE;
    }
    else {
        pDev->spriteInfo->anim.pCursor = 0;
        pDev->spriteInfo->anim.pScreen = 0;
        ret = (*pScreen->DisplayCursor) (pDev, pScreen, pCursor);
    }
    Wrap(as, pScreen, DisplayCursor, AnimCurDisplayCursor);
    return ret;
}

static Bool
AnimCurSetCursorPosition(DeviceIntPtr pDev,
                         ScreenPtr pScreen, int x, int y, Bool generateEvent)
{
    AnimCurScreenPtr as = GetAnimCurScreen(pScreen);
    Bool ret;

    Unwrap(as, pScreen, SetCursorPosition);
    if (pDev->spriteInfo->anim.pCursor) {
        pDev->spriteInfo->anim.pScreen = pScreen;

        if (!as->BlockHandler)
            Wrap(as, pScreen, BlockHandler, AnimCurScreenBlockHandler);
    }
    ret = (*pScreen->SetCursorPosition) (pDev, pScreen, x, y, generateEvent);
    Wrap(as, pScreen, SetCursorPosition, AnimCurSetCursorPosition);
    return ret;
}

static Bool
AnimCurRealizeCursor(DeviceIntPtr pDev, ScreenPtr pScreen, CursorPtr pCursor)
{
    AnimCurScreenPtr as = GetAnimCurScreen(pScreen);
    Bool ret;

    Unwrap(as, pScreen, RealizeCursor);
    if (IsAnimCur(pCursor))
        ret = TRUE;
    else
        ret = (*pScreen->RealizeCursor) (pDev, pScreen, pCursor);
    Wrap(as, pScreen, RealizeCursor, AnimCurRealizeCursor);
    return ret;
}

static Bool
AnimCurUnrealizeCursor(DeviceIntPtr pDev, ScreenPtr pScreen, CursorPtr pCursor)
{
    AnimCurScreenPtr as = GetAnimCurScreen(pScreen);
    Bool ret;

    Unwrap(as, pScreen, UnrealizeCursor);
    if (IsAnimCur(pCursor)) {
        AnimCurPtr ac = GetAnimCur(pCursor);
        int i;

        if (pScreen->myNum == 0)
            for (i = 0; i < ac->nelt; i++)
                FreeCursor(ac->elts[i].pCursor, 0);
        ret = TRUE;
    }
    else
        ret = (*pScreen->UnrealizeCursor) (pDev, pScreen, pCursor);
    Wrap(as, pScreen, UnrealizeCursor, AnimCurUnrealizeCursor);
    return ret;
}

static void
AnimCurRecolorCursor(DeviceIntPtr pDev,
                     ScreenPtr pScreen, CursorPtr pCursor, Bool displayed)
{
    AnimCurScreenPtr as = GetAnimCurScreen(pScreen);

    Unwrap(as, pScreen, RecolorCursor);
    if (IsAnimCur(pCursor)) {
        AnimCurPtr ac = GetAnimCur(pCursor);
        int i;

        for (i = 0; i < ac->nelt; i++)
            (*pScreen->RecolorCursor) (pDev, pScreen, ac->elts[i].pCursor,
                                       displayed &&
                                       pDev->spriteInfo->anim.elt == i);
    }
    else
        (*pScreen->RecolorCursor) (pDev, pScreen, pCursor, displayed);
    Wrap(as, pScreen, RecolorCursor, AnimCurRecolorCursor);
}

Bool
AnimCurInit(ScreenPtr pScreen)
{
    AnimCurScreenPtr as;

    if (!dixRegisterPrivateKey(&AnimCurScreenPrivateKeyRec, PRIVATE_SCREEN, 0))
        return FALSE;

    as = (AnimCurScreenPtr) malloc(sizeof(AnimCurScreenRec));
    if (!as)
        return FALSE;
    Wrap(as, pScreen, CloseScreen, AnimCurCloseScreen);

    as->BlockHandler = NULL;

    Wrap(as, pScreen, CursorLimits, AnimCurCursorLimits);
    Wrap(as, pScreen, DisplayCursor, AnimCurDisplayCursor);
    Wrap(as, pScreen, SetCursorPosition, AnimCurSetCursorPosition);
    Wrap(as, pScreen, RealizeCursor, AnimCurRealizeCursor);
    Wrap(as, pScreen, UnrealizeCursor, AnimCurUnrealizeCursor);
    Wrap(as, pScreen, RecolorCursor, AnimCurRecolorCursor);
    SetAnimCurScreen(pScreen, as);
    return TRUE;
}

int
AnimCursorCreate(CursorPtr *cursors, CARD32 *deltas, int ncursor,
                 CursorPtr *ppCursor, ClientPtr client, XID cid)
{
    CursorPtr pCursor;
    int rc, i;
    AnimCurPtr ac;

    for (i = 0; i < screenInfo.numScreens; i++)
        if (!GetAnimCurScreen(screenInfo.screens[i]))
            return BadImplementation;

    for (i = 0; i < ncursor; i++)
        if (IsAnimCur(cursors[i]))
            return BadMatch;

    pCursor = (CursorPtr) calloc(CURSOR_REC_SIZE +
                                 sizeof(AnimCurRec) +
                                 ncursor * sizeof(AnimCurElt), 1);
    if (!pCursor)
        return BadAlloc;
    dixInitPrivates(pCursor, pCursor + 1, PRIVATE_CURSOR);
    pCursor->bits = &animCursorBits;
    pCursor->refcnt = 1;

    pCursor->foreRed = cursors[0]->foreRed;
    pCursor->foreGreen = cursors[0]->foreGreen;
    pCursor->foreBlue = cursors[0]->foreBlue;

    pCursor->backRed = cursors[0]->backRed;
    pCursor->backGreen = cursors[0]->backGreen;
    pCursor->backBlue = cursors[0]->backBlue;

    pCursor->id = cid;

    /* security creation/labeling check */
    rc = XaceHook(XACE_RESOURCE_ACCESS, client, cid, RT_CURSOR, pCursor,
                  RT_NONE, NULL, DixCreateAccess);
    if (rc != Success) {
        dixFiniPrivates(pCursor, PRIVATE_CURSOR);
        free(pCursor);
        return rc;
    }

    /*
     * Fill in the AnimCurRec
     */
    animCursorBits.refcnt++;
    ac = GetAnimCur(pCursor);
    ac->nelt = ncursor;
    ac->elts = (AnimCurElt *) (ac + 1);

    for (i = 0; i < ncursor; i++) {
        ac->elts[i].pCursor = RefCursor(cursors[i]);
        ac->elts[i].delay = deltas[i];
    }

    *ppCursor = pCursor;
    return Success;
}