summaryrefslogtreecommitdiff
path: root/src/xcms/cmsCmap.c
blob: bc26638c10a548fbeed51b6214d38ed1d3cf56c5 (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
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
/* $Xorg: cmsCmap.c,v 1.3 2000/08/17 19:45:09 cpqbld Exp $ */

/*
 * Code and supporting documentation (c) Copyright 1990 1991 Tektronix, Inc.
 * 	All Rights Reserved
 * 
 * This file is a component of an X Window System-specific implementation
 * of Xcms based on the TekColor Color Management System.  Permission is
 * hereby granted to use, copy, modify, sell, and otherwise distribute this
 * software and its documentation for any purpose and without fee, provided
 * that this copyright, permission, and disclaimer notice is reproduced in
 * all copies of this software and in supporting documentation.  TekColor
 * is a trademark of Tektronix, Inc.
 * 
 * Tektronix makes no representation about the suitability of this software
 * for any purpose.  It is provided "as is" and with all faults.
 * 
 * TEKTRONIX DISCLAIMS ALL WARRANTIES APPLICABLE TO THIS SOFTWARE,
 * INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
 * PARTICULAR PURPOSE.  IN NO EVENT SHALL TEKTRONIX 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 THE PERFORMANCE OF THIS SOFTWARE.
 *
 *
 *	NAME
 *		XcmsCmap.c - Client Colormap Management Routines
 *
 *	DESCRIPTION
 *		Routines that store additional information about
 *		colormaps being used by the X Client.
 *
 *
 */
/* $XFree86$ */

#define NEED_EVENTS
#define NEED_REPLIES
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include "Xlibint.h"
#include "Xcmsint.h"
#include "Xutil.h"
#include "Cmap.h"
#include "Cv.h"

/*
 *      FORWARD DECLARATIONS
 */
static void _XcmsFreeClientCmaps(Display *dpy);


/************************************************************************
 *									*
 *			PRIVATE INTERFACES				*
 *									*
 ************************************************************************/

/*
 *	NAME
 *		CmapRecForColormap
 *
 *	SYNOPSIS
 */
static XcmsCmapRec *
CmapRecForColormap(
    Display *dpy,
    Colormap cmap)
/*
 *	DESCRIPTION
 *		Find the corresponding XcmsCmapRec for cmap.  In not found
 *		this routines attempts to create one.
 *
 *	RETURNS
 *		Returns NULL if failed; otherwise the address to
 *		the corresponding XcmsCmapRec.
 *
 */
{
    XcmsCmapRec *pRec;
    int nScrn;
    int i, j;
    XVisualInfo visualTemplate;	/* Template of the visual we want */
    XVisualInfo *visualList;	/* List for visuals that match */
    int nVisualsMatched;	/* Number of visuals that match */
    Window tmpWindow;
    Visual *vp;
    unsigned long border = 0;
    _XAsyncHandler async;
    _XAsyncErrorState async_state;

    for (pRec = (XcmsCmapRec *)dpy->cms.clientCmaps; pRec != NULL;
	    pRec = pRec->pNext) {
	if (pRec->cmapID == cmap) {
	    return(pRec);
	}
    }

    /*
     * Can't find an XcmsCmapRec associated with cmap in our records.
     * Let's try to see if its a default colormap
     */
    nScrn = ScreenCount(dpy);
    for (i = 0; i < nScrn; i++) {
	if (cmap == DefaultColormap(dpy, i)) {
	    /* It is ... lets go ahead and store that info */
	    if ((pRec = _XcmsAddCmapRec(dpy, cmap, RootWindow(dpy, i),
		    DefaultVisual(dpy, i))) == NULL) {
		return((XcmsCmapRec *)NULL);
	    }
	    pRec->ccc = XcmsCreateCCC(
		    dpy,
		    i,			/* screenNumber */
		    DefaultVisual(dpy, i),
		    (XcmsColor *)NULL,	/* clientWhitePt */
		    (XcmsCompressionProc)NULL,  /* gamutCompProc */
		    (XPointer)NULL,	/* gamutCompClientData */
		    (XcmsWhiteAdjustProc)NULL,  /* whitePtAdjProc */
		    (XPointer)NULL	/* whitePtAdjClientData */
		    );
	    return(pRec);
	}
    }

    /*
     * Nope, its not a default colormap, so it's probably a foreign color map
     * of which we have no specific details.  Let's go through the
     * rigorous process of finding this colormap:
     *        for each screen
     *            for each screen's visual types
     *                create a window with cmap specified as the colormap
     *                if successful
     *                    Add a CmapRec
     *                    Create an XcmsCCC
     *                    return the CmapRec
     *                else
     *                    continue
     */

    async_state.error_code = 0; /* don't care */
    async_state.major_opcode = X_CreateWindow;
    async_state.minor_opcode = 0;
    for (i = 0; i < nScrn; i++) {
	visualTemplate.screen = i;
	visualList = XGetVisualInfo(dpy, VisualScreenMask, &visualTemplate,
	    &nVisualsMatched);
	if (nVisualsMatched == 0) {
	    continue;
	}

	/*
	 * Attempt to create a window with cmap
	 */
	j = 0;
	do {
	    vp = (visualList+j)->visual;
	    LockDisplay(dpy);
	    {
		register xCreateWindowReq *req;

		GetReq(CreateWindow, req);
		async_state.min_sequence_number = dpy->request;
		async_state.max_sequence_number = dpy->request;
		async_state.error_count = 0;
		async.next = dpy->async_handlers;
		async.handler = _XAsyncErrorHandler;
		async.data = (XPointer)&async_state;
		dpy->async_handlers = &async;
		req->parent = RootWindow(dpy, i);
		req->x = 0;
		req->y = 0;
		req->width = 1;
		req->height = 1;
		req->borderWidth = 0;
		req->depth = (visualList+j)->depth;
		req->class = CopyFromParent;
		req->visual = vp->visualid;
		tmpWindow = req->wid = XAllocID(dpy);
		req->mask = CWBorderPixel | CWColormap;
		req->length += 2;
		Data32 (dpy, (long *) &border, 4);
		Data32 (dpy, (long *) &cmap, 4);
	    }
	    {
		xGetInputFocusReply rep;
		register xReq *req;

		GetEmptyReq(GetInputFocus, req);
		(void) _XReply (dpy, (xReply *)&rep, 0, xTrue);
	    }
	    DeqAsyncHandler(dpy, &async);
	    UnlockDisplay(dpy);
	    SyncHandle();
	} while (async_state.error_count > 0 && ++j < nVisualsMatched);

	Xfree((char *)visualList);

	/*
	 * if successful
	 */
	if (j < nVisualsMatched) {
	    if ((pRec = _XcmsAddCmapRec(dpy, cmap, tmpWindow, vp)) == NULL)
		return((XcmsCmapRec *)NULL);
	    pRec->ccc = XcmsCreateCCC(
		    dpy,
		    i,			/* screenNumber */
		    vp,
		    (XcmsColor *)NULL,	/* clientWhitePt */
		    (XcmsCompressionProc)NULL,  /* gamutCompProc */
		    (XPointer)NULL,	/* gamutCompClientData */
		    (XcmsWhiteAdjustProc)NULL,  /* whitePtAdjProc */
		    (XPointer)NULL	/* whitePtAdjClientData */
		    );
	    XDestroyWindow(dpy, tmpWindow);
	    return(pRec);
	}
    }

    return(NULL);
}



/************************************************************************
 *									*
 *			API PRIVATE INTERFACES				*
 *									*
 ************************************************************************/

/*
 *	NAME
 *		_XcmsAddCmapRec
 *
 *	SYNOPSIS
 */
XcmsCmapRec *
_XcmsAddCmapRec(dpy, cmap, windowID, visual)
    Display *dpy;
    Colormap cmap;
    Window windowID;
    Visual *visual;
/*
 *	DESCRIPTION
 *		Create an XcmsCmapRec for the specified cmap, windowID,
 *		and visual, then adds it to its list of CmapRec's.
 *
 *	RETURNS
 *		Returns NULL if failed; otherwise the address to
 *		the added XcmsCmapRec.
 *
 */
{
    XcmsCmapRec *pNew;

    if ((pNew = (XcmsCmapRec *) Xcalloc(1, (unsigned) sizeof(XcmsCmapRec)))
	    == NULL) {
	return((XcmsCmapRec *)NULL);
    }

    pNew->cmapID = cmap;
    pNew->dpy = dpy;
    pNew->windowID = windowID;
    pNew->visual = visual;
    pNew->pNext = (XcmsCmapRec *)dpy->cms.clientCmaps;
    dpy->cms.clientCmaps = (XPointer)pNew;
    dpy->free_funcs->clientCmaps = _XcmsFreeClientCmaps;

    /*
     * Note, we don't create the XcmsCCC for pNew->ccc here because
     * it may require the use of XGetWindowAttributes (a round trip request)
     * to determine the screen.
     */
    return(pNew);
}


/*
 *	NAME
 *		_XcmsCopyCmapRecAndFree
 *
 *	SYNOPSIS
 */
XcmsCmapRec *
_XcmsCopyCmapRecAndFree(
    Display *dpy,
    Colormap src_cmap,
    Colormap copy_cmap)
/*
 *	DESCRIPTION
 *		Augments Xlib's XCopyColormapAndFree() to copy
 *		XcmsCmapRecs.
 *
 *	RETURNS
 *		Returns NULL if failed; otherwise the address to
 *		the copy XcmsCmapRec.
 *
 */
{
    XcmsCmapRec *pRec_src;
    XcmsCmapRec *pRec_copy;

    if ((pRec_src = CmapRecForColormap(dpy, src_cmap)) != NULL) {
	pRec_copy =_XcmsAddCmapRec(dpy, copy_cmap, pRec_src->windowID,
		pRec_src->visual);
	if (pRec_copy != NULL && pRec_src->ccc) {
	    pRec_copy->ccc = (XcmsCCC)Xcalloc(1, (unsigned) sizeof(XcmsCCCRec));
	    memcpy((char *)pRec_copy->ccc, (char *)pRec_src->ccc,
		   sizeof(XcmsCCCRec));
	}
	return(pRec_copy);
    }
    return((XcmsCmapRec *)NULL);
}


/*
 *	NAME
 *		_XcmsDeleteCmapRec
 *
 *	SYNOPSIS
 */
void
_XcmsDeleteCmapRec(
    Display *dpy,
    Colormap cmap)
/*
 *	DESCRIPTION
 *		Removes and frees the specified XcmsCmapRec structure
 *		from the linked list of structures.
 *
 *	RETURNS
 *		void
 *
 */
{
    XcmsCmapRec **pPrevPtr;
    XcmsCmapRec *pRec;
    int scr;

    /* If it is the default cmap for a screen, do not delete it,
     * because the server will not actually free it */
    for (scr = ScreenCount(dpy); --scr >= 0; ) {
	if (cmap == DefaultColormap(dpy, scr))
	    return;
    }

    /* search for it in the list */
    pPrevPtr = (XcmsCmapRec **)&dpy->cms.clientCmaps;
    while ((pRec = *pPrevPtr) && (pRec->cmapID != cmap)) {
	pPrevPtr = &pRec->pNext;
    }

    if (pRec) {
	if (pRec->ccc) {
	    XcmsFreeCCC(pRec->ccc);
	}
	*pPrevPtr = pRec->pNext;
	Xfree((char *)pRec);
    }
}


/*
 *	NAME
 *		_XcmsFreeClientCmaps
 *
 *	SYNOPSIS
 */
static void
_XcmsFreeClientCmaps(
    Display *dpy)
/*
 *	DESCRIPTION
 *		Frees all XcmsCmapRec structures in the linked list
 *		and sets dpy->cms.clientCmaps to NULL.
 *
 *	RETURNS
 *		void
 *
 */
{
    XcmsCmapRec *pRecNext, *pRecFree;

    pRecNext = (XcmsCmapRec *)dpy->cms.clientCmaps;
    while (pRecNext != NULL) {
	pRecFree = pRecNext;
	pRecNext = pRecNext->pNext;
	if (pRecFree->ccc) {
	    /* Free the XcmsCCC structure */
	    XcmsFreeCCC(pRecFree->ccc);
	}
	/* Now free the XcmsCmapRec structure */
	Xfree((char *)pRecFree);
    }
    dpy->cms.clientCmaps = (XPointer)NULL;
}



/************************************************************************
 *									*
 *			PUBLIC INTERFACES				*
 *									*
 ************************************************************************/

/*
 *	NAME
 *		XcmsCCCOfColormap
 *
 *	SYNOPSIS
 */
XcmsCCC 
XcmsCCCOfColormap(dpy, cmap)
    Display *dpy;
    Colormap cmap;
/*
 *	DESCRIPTION
 *		Finds the XcmsCCC associated with the specified colormap.
 *
 *	RETURNS
 *		Returns NULL if failed; otherwise the address to
 *		the associated XcmsCCC structure.
 *
 */
{
    XWindowAttributes windowAttr;
    XcmsCmapRec *pRec;
    int nScrn = ScreenCount(dpy);
    int i;

    if ((pRec = CmapRecForColormap(dpy, cmap)) != NULL) {
	if (pRec->ccc) {
	    /* XcmsCmapRec already has a XcmsCCC */
	    return(pRec->ccc);
	}

	/*
	 * The XcmsCmapRec does not have a XcmsCCC yet, so let's create
	 * one.  But first, we need to know the screen associated with
	 * cmap, so use XGetWindowAttributes() to extract that
	 * information.  Unless, of course there is only one screen!!
	 */
	if (nScrn == 1) {
	    /* Assume screenNumber == 0 */
	    return(pRec->ccc = XcmsCreateCCC(
		    dpy,
		    0,			/* screenNumber */
		    pRec->visual,
		    (XcmsColor *)NULL,	/* clientWhitePt */
		    (XcmsCompressionProc)NULL,  /* gamutCompProc */
		    (XPointer)NULL,	/* gamutCompClientData */
		    (XcmsWhiteAdjustProc)NULL,  /* whitePtAdjProc */
		    (XPointer)NULL	/* whitePtAdjClientData */
		    ));
	} else {
	    if (XGetWindowAttributes(dpy, pRec->windowID, &windowAttr)) {
		for (i = 0; i < nScrn; i++) {
		    if (ScreenOfDisplay(dpy, i) == windowAttr.screen) {
			return(pRec->ccc = XcmsCreateCCC(
				dpy,
				i,		   /* screenNumber */
				pRec->visual,
				(XcmsColor *)NULL, /* clientWhitePt */
				(XcmsCompressionProc)NULL, /* gamutCompProc */
				(XPointer)NULL,	   /* gamutCompClientData */
				(XcmsWhiteAdjustProc)NULL, /* whitePtAdjProc */
				(XPointer)NULL	   /* whitePtAdjClientData */
				));
		    }
		}
	    }
	}
    }

    /*
     * No such cmap
     */
    return(NULL);
}

XcmsCCC XcmsSetCCCOfColormap(dpy, cmap, ccc)
    Display *dpy;
    Colormap cmap;
    XcmsCCC ccc;
{
    XcmsCCC prev_ccc = NULL;
    XcmsCmapRec *pRec;

    pRec = CmapRecForColormap(dpy, cmap);
    if (pRec) {
	prev_ccc = pRec->ccc;
	pRec->ccc = ccc;
    }
    return prev_ccc;
}