aboutsummaryrefslogtreecommitdiff
path: root/xorg-server/hw/xfree86/modes/xf86Rotate.c
blob: d9face1cb81d1b943e9a48d565ad8cb5bd2c28dd (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
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
/*
 * 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.
 */

#ifdef HAVE_XORG_CONFIG_H
#include <xorg-config.h>
#else
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#endif

#include <stddef.h>
#include <string.h>
#include <stdio.h>

#include "xf86.h"
#include "xf86DDC.h"
#include "fb.h"
#include "windowstr.h"
#include "xf86Crtc.h"
#include "xf86Modes.h"
#include "xf86RandR12.h"
#include "X11/extensions/render.h"
#include "X11/extensions/dpmsconst.h"
#include "X11/Xatom.h"

/* borrowed from composite extension, move to Render and publish? */

static VisualPtr
compGetWindowVisual (WindowPtr pWin)
{
    ScreenPtr	    pScreen = pWin->drawable.pScreen;
    VisualID	    vid = wVisual (pWin);
    int		    i;

    for (i = 0; i < pScreen->numVisuals; i++)
	if (pScreen->visuals[i].vid == vid)
	    return &pScreen->visuals[i];
    return 0;
}

static PictFormatPtr
compWindowFormat (WindowPtr pWin)
{
    ScreenPtr	pScreen = pWin->drawable.pScreen;
    
    return PictureMatchVisual (pScreen, pWin->drawable.depth,
			       compGetWindowVisual (pWin));
}

#define F(x)	IntToxFixed(x)

#define toF(x)	((float) (x) / 65536.0f)

static void
xf86RotateCrtcRedisplay (xf86CrtcPtr crtc, RegionPtr region)
{
    ScrnInfoPtr		scrn = crtc->scrn;
    ScreenPtr		screen = scrn->pScreen;
    WindowPtr		root = WindowTable[screen->myNum];
    PixmapPtr		dst_pixmap = crtc->rotatedPixmap;
    PictFormatPtr	format = compWindowFormat (WindowTable[screen->myNum]);
    int			error;
    PicturePtr		src, dst;
    int			n = REGION_NUM_RECTS(region);
    BoxPtr		b = REGION_RECTS(region);
    XID			include_inferiors = IncludeInferiors;
    
    src = CreatePicture (None,
			 &root->drawable,
			 format,
			 CPSubwindowMode,
			 &include_inferiors,
			 serverClient,
			 &error);
    if (!src)
	return;

    dst = CreatePicture (None,
			 &dst_pixmap->drawable,
			 format,
			 0L,
			 NULL,
			 serverClient,
			 &error);
    if (!dst)
	return;

    error = SetPictureTransform (src, &crtc->crtc_to_framebuffer);
    if (error)
	return;
    if (crtc->transform_in_use && crtc->filter)
	SetPicturePictFilter (src, crtc->filter,
			      crtc->params, crtc->nparams);

    if (crtc->shadowClear)
    {
	CompositePicture (PictOpSrc,
			  src, NULL, dst,
			  0, 0, 0, 0, 0, 0,
			  crtc->mode.HDisplay, crtc->mode.VDisplay);
	crtc->shadowClear = FALSE;
    }
    else
    {
	while (n--)
	{
	    BoxRec	dst_box;

	    dst_box = *b;
	    dst_box.x1 -= crtc->filter_width >> 1;
	    dst_box.x2 += crtc->filter_width >> 1;
	    dst_box.y1 -= crtc->filter_height >> 1;
	    dst_box.y2 += crtc->filter_height >> 1;
	    pixman_f_transform_bounds (&crtc->f_framebuffer_to_crtc, &dst_box);
	    CompositePicture (PictOpSrc,
			      src, NULL, dst,
			      dst_box.x1, dst_box.y1, 0, 0, dst_box.x1, dst_box.y1,
			      dst_box.x2 - dst_box.x1,
			      dst_box.y2 - dst_box.y1);
	    b++;
	}
    }
    FreePicture (src, None);
    FreePicture (dst, None);
}

static void
xf86CrtcShadowClear (xf86CrtcPtr crtc)
{
    PixmapPtr		dst_pixmap = crtc->rotatedPixmap;
    ScrnInfoPtr		scrn = crtc->scrn;
    ScreenPtr		screen = scrn->pScreen;
    PicturePtr		dst;
    PictFormatPtr	format = compWindowFormat (WindowTable[screen->myNum]);
    static xRenderColor black = { 0, 0, 0, 0 };
    xRectangle		rect;
    int			error;

    if (!dst_pixmap)
	return;
    dst = CreatePicture (None,
			 &dst_pixmap->drawable,
			 format,
			 0L,
			 NULL,
			 serverClient,
			 &error);
    if (!dst)
	return;
    rect.x = 0;
    rect.y = 0;
    rect.width = dst_pixmap->drawable.width;
    rect.height = dst_pixmap->drawable.height;
    CompositeRects (PictOpSrc, dst, &black, 1, &rect);
    FreePicture (dst, None);
}

static void
xf86CrtcDamageShadow (xf86CrtcPtr crtc)
{
    ScrnInfoPtr	pScrn = crtc->scrn;
    BoxRec	damage_box;
    RegionRec   damage_region;
    ScreenPtr	pScreen = pScrn->pScreen;

    damage_box.x1 = 0;
    damage_box.x2 = crtc->mode.HDisplay;
    damage_box.y1 = 0;
    damage_box.y2 = crtc->mode.VDisplay;
    if (!pixman_transform_bounds (&crtc->crtc_to_framebuffer, &damage_box))
    {
	damage_box.x1 = 0;
	damage_box.y1 = 0;
	damage_box.x2 = pScreen->width;
	damage_box.y2 = pScreen->height;
    }
    if (damage_box.x1 < 0) damage_box.x1 = 0;
    if (damage_box.y1 < 0) damage_box.y1 = 0;
    if (damage_box.x2 > pScreen->width) damage_box.x2 = pScreen->width;
    if (damage_box.y2 > pScreen->height) damage_box.y2 = pScreen->height;
    REGION_INIT (pScreen, &damage_region, &damage_box, 1);
    DamageRegionAppend (&(*pScreen->GetScreenPixmap)(pScreen)->drawable,
			&damage_region);
    REGION_UNINIT (pScreen, &damage_region);
    crtc->shadowClear = TRUE;
}

static void
xf86RotatePrepare (ScreenPtr pScreen)
{
    ScrnInfoPtr		pScrn = xf86Screens[pScreen->myNum];
    xf86CrtcConfigPtr   xf86_config = XF86_CRTC_CONFIG_PTR(pScrn);
    int			c;

    for (c = 0; c < xf86_config->num_crtc; c++)
    {
	xf86CrtcPtr crtc = xf86_config->crtc[c];
	
	if (crtc->rotatedData && !crtc->rotatedPixmap)
	{
	    crtc->rotatedPixmap = crtc->funcs->shadow_create (crtc,
							     crtc->rotatedData,
							     crtc->mode.HDisplay,
							     crtc->mode.VDisplay);
	    if (!xf86_config->rotation_damage_registered)
	    {
		/* Hook damage to screen pixmap */
		DamageRegister (&(*pScreen->GetScreenPixmap)(pScreen)->drawable,
				xf86_config->rotation_damage);
		xf86_config->rotation_damage_registered = TRUE;
		EnableLimitedSchedulingLatency();
	    }
	    
	    xf86CrtcDamageShadow (crtc);
	}
    }
}

static Bool
xf86RotateRedisplay(ScreenPtr pScreen)
{
    ScrnInfoPtr		pScrn = xf86Screens[pScreen->myNum];
    xf86CrtcConfigPtr   xf86_config = XF86_CRTC_CONFIG_PTR(pScrn);
    DamagePtr		damage = xf86_config->rotation_damage;
    RegionPtr		region;

    if (!damage)
	return FALSE;
    xf86RotatePrepare (pScreen);
    region = DamageRegion(damage);
    if (REGION_NOTEMPTY(pScreen, region)) 
    {
	int			c;
	SourceValidateProcPtr	SourceValidate;

	/*
	 * SourceValidate is used by the software cursor code
	 * to pull the cursor off of the screen when reading
	 * bits from the frame buffer. Bypassing this function
	 * leaves the software cursor in place
	 */
	SourceValidate = pScreen->SourceValidate;
	pScreen->SourceValidate = NULL;

	for (c = 0; c < xf86_config->num_crtc; c++)
	{
	    xf86CrtcPtr	    crtc = xf86_config->crtc[c];

	    if (crtc->transform_in_use && crtc->enabled)
	    {
		RegionRec   crtc_damage;

		/* compute portion of damage that overlaps crtc */
		REGION_INIT(pScreen, &crtc_damage, &crtc->bounds, 1);
		REGION_INTERSECT (pScreen, &crtc_damage, &crtc_damage, region);
		
		/* update damaged region */
		if (REGION_NOTEMPTY(pScreen, &crtc_damage))
    		    xf86RotateCrtcRedisplay (crtc, &crtc_damage);
		
		REGION_UNINIT (pScreen, &crtc_damage);
	    }
	}
	pScreen->SourceValidate = SourceValidate;
	DamageEmpty(damage);
    }
    return TRUE;
}

static void
xf86RotateBlockHandler(int screenNum, pointer blockData,
		       pointer pTimeout, pointer pReadmask)
{
    ScreenPtr		pScreen = screenInfo.screens[screenNum];
    ScrnInfoPtr		pScrn = xf86Screens[screenNum];
    xf86CrtcConfigPtr   xf86_config = XF86_CRTC_CONFIG_PTR(pScrn);
    Bool		rotation_active;

    rotation_active = xf86RotateRedisplay(pScreen);
    pScreen->BlockHandler = xf86_config->BlockHandler;
    (*pScreen->BlockHandler) (screenNum, blockData, pTimeout, pReadmask);
    if (rotation_active) {
	/* Re-wrap if rotation is still happening */
	xf86_config->BlockHandler = pScreen->BlockHandler;
	pScreen->BlockHandler = xf86RotateBlockHandler;
    } else {
	xf86_config->BlockHandler = NULL;
    }
}

void
xf86RotateDestroy (xf86CrtcPtr crtc)
{
    ScrnInfoPtr		pScrn = crtc->scrn;
    ScreenPtr		pScreen = pScrn->pScreen;
    xf86CrtcConfigPtr   xf86_config = XF86_CRTC_CONFIG_PTR(pScrn);
    int			c;
    
    /* Free memory from rotation */
    if (crtc->rotatedPixmap || crtc->rotatedData)
    {
	crtc->funcs->shadow_destroy (crtc, crtc->rotatedPixmap, crtc->rotatedData);
	crtc->rotatedPixmap = NULL;
	crtc->rotatedData = NULL;
    }

    for (c = 0; c < xf86_config->num_crtc; c++)
	if (xf86_config->crtc[c]->transform_in_use)
	    return;

    /*
     * Clean up damage structures when no crtcs are rotated
     */
    if (xf86_config->rotation_damage)
    {
	/* Free damage structure */
	if (xf86_config->rotation_damage_registered)
	{
	    DamageUnregister (&(*pScreen->GetScreenPixmap)(pScreen)->drawable,
			      xf86_config->rotation_damage);
	    xf86_config->rotation_damage_registered = FALSE;
	    DisableLimitedSchedulingLatency();
	}
	DamageDestroy (xf86_config->rotation_damage);
	xf86_config->rotation_damage = NULL;
    }
}

void
xf86RotateFreeShadow(ScrnInfoPtr pScrn)
{
    xf86CrtcConfigPtr config = XF86_CRTC_CONFIG_PTR(pScrn);
    int c;

   for (c = 0; c < config->num_crtc; c++) {
       xf86CrtcPtr crtc = config->crtc[c];

       if (crtc->rotatedPixmap || crtc->rotatedData) {
	   crtc->funcs->shadow_destroy(crtc, crtc->rotatedPixmap,
				crtc->rotatedData);
	   crtc->rotatedPixmap = NULL;
	   crtc->rotatedData = NULL;
       }
   }
}

void
xf86RotateCloseScreen (ScreenPtr screen)
{
    ScrnInfoPtr		scrn = xf86Screens[screen->myNum];
    xf86CrtcConfigPtr   xf86_config = XF86_CRTC_CONFIG_PTR(scrn);
    int			c;

    for (c = 0; c < xf86_config->num_crtc; c++)
	xf86RotateDestroy (xf86_config->crtc[c]);
}

static Bool
xf86CrtcFitsScreen (xf86CrtcPtr crtc, struct pict_f_transform *crtc_to_fb)
{
    ScrnInfoPtr		pScrn = crtc->scrn;
    BoxRec		b;

    /* When called before PreInit, the driver is
     * presumably doing load detect
     */
    if (pScrn->virtualX == 0 || pScrn->virtualY == 0)
	return TRUE;

    b.x1 = 0;
    b.y1 = 0;
    b.x2 = crtc->mode.HDisplay;
    b.y2 = crtc->mode.VDisplay;
    if (crtc_to_fb)
	pixman_f_transform_bounds (crtc_to_fb, &b);
    else {
	b.x1 += crtc->x;
	b.y1 += crtc->y;
	b.x2 += crtc->x;
	b.y2 += crtc->y;
    }

    return (0 <= b.x1 && b.x2 <= pScrn->virtualX &&
	    0 <= b.y1 && b.y2 <= pScrn->virtualY);
}

Bool
xf86CrtcRotate (xf86CrtcPtr crtc)
{
    ScrnInfoPtr		pScrn = crtc->scrn;
    xf86CrtcConfigPtr   xf86_config = XF86_CRTC_CONFIG_PTR(pScrn);
    /* if this is called during ScreenInit() we don't have pScrn->pScreen yet */
    ScreenPtr		pScreen = screenInfo.screens[pScrn->scrnIndex];
    PictTransform	crtc_to_fb;
    struct pict_f_transform f_crtc_to_fb, f_fb_to_crtc;
    xFixed		*new_params = NULL;
    int			new_nparams = 0;
    PictFilterPtr	new_filter = NULL;
    int			new_width = 0;
    int			new_height = 0;
    RRTransformPtr	transform = NULL;
    Bool		damage = FALSE;

    if (crtc->transformPresent)
	transform = &crtc->transform;

    if (!RRTransformCompute (crtc->x, crtc->y,
			     crtc->mode.HDisplay, crtc->mode.VDisplay,
			     crtc->rotation,
			     transform,

			     &crtc_to_fb,
			     &f_crtc_to_fb,
			     &f_fb_to_crtc) &&
	xf86CrtcFitsScreen (crtc, &f_crtc_to_fb))
    {
	/*
	 * If the untranslated transformation is the identity,
	 * disable the shadow buffer
	 */
	xf86RotateDestroy (crtc);
	crtc->transform_in_use = FALSE;
	if (new_params)
	    xfree (new_params);
	new_params = NULL;
	new_nparams = 0;
	new_filter = NULL;
	new_width = 0;
	new_height = 0;
    }
    else
    {
	/*
	 * these are the size of the shadow pixmap, which
	 * matches the mode, not the pre-rotated copy in the
	 * frame buffer
	 */
	int	    width = crtc->mode.HDisplay;
	int	    height = crtc->mode.VDisplay;
	void	    *shadowData = crtc->rotatedData;
	PixmapPtr   shadow = crtc->rotatedPixmap;
	int	    old_width = shadow ? shadow->drawable.width : 0;
	int	    old_height = shadow ? shadow->drawable.height : 0;

	/* Allocate memory for rotation */
	if (old_width != width || old_height != height)
	{
	    if (shadow || shadowData)
	    {
		crtc->funcs->shadow_destroy (crtc, shadow, shadowData);
		crtc->rotatedPixmap = NULL;
		crtc->rotatedData = NULL;
	    }
	    shadowData = crtc->funcs->shadow_allocate (crtc, width, height);
	    if (!shadowData)
		goto bail1;
	    crtc->rotatedData = shadowData;
	    /* shadow will be damaged in xf86RotatePrepare */
	}
	else
	{
	    /* mark shadowed area as damaged so it will be repainted */
	    damage = TRUE;
	}

	if (!xf86_config->rotation_damage)
	{
	    /* Create damage structure */
	    xf86_config->rotation_damage = DamageCreate (NULL, NULL,
						DamageReportNone,
						TRUE, pScreen, pScreen);
	    if (!xf86_config->rotation_damage)
		goto bail2;
	    
	    /* Wrap block handler */
	    if (!xf86_config->BlockHandler) {
		xf86_config->BlockHandler = pScreen->BlockHandler;
		pScreen->BlockHandler = xf86RotateBlockHandler;
	    }
	}
#ifdef RANDR_12_INTERFACE
	if (transform)
	{
	    if (transform->nparams) {
		new_params = xalloc (transform->nparams * sizeof (xFixed));
		if (new_params) {
		    memcpy (new_params, transform->params,
			    transform->nparams * sizeof (xFixed));
		    new_nparams = transform->nparams;
		    new_filter = transform->filter;
		}
	    } else
		new_filter = transform->filter;
	    if (new_filter)
	    {
		new_width = new_filter->width;
		new_height = new_filter->height;
	    }
	}
#endif

	if (0)
	{
    bail2:
	    if (shadow || shadowData)
	    {
		crtc->funcs->shadow_destroy (crtc, shadow, shadowData);
		crtc->rotatedPixmap = NULL;
		crtc->rotatedData = NULL;
	    }
    bail1:
	    if (old_width && old_height)
		crtc->rotatedPixmap = crtc->funcs->shadow_create (crtc,
								  NULL,
								  old_width,
								  old_height);
	    return FALSE;
	}
	crtc->transform_in_use = TRUE;
    }
    crtc->crtc_to_framebuffer = crtc_to_fb;
    crtc->f_crtc_to_framebuffer = f_crtc_to_fb;
    crtc->f_framebuffer_to_crtc = f_fb_to_crtc;
    if (crtc->params)
	xfree (crtc->params);
    crtc->params = new_params;
    crtc->nparams = new_nparams;
    crtc->filter = new_filter;
    crtc->filter_width = new_width;
    crtc->filter_height = new_height;
    crtc->bounds.x1 = 0;
    crtc->bounds.x2 = crtc->mode.HDisplay;
    crtc->bounds.y1 = 0;
    crtc->bounds.y2 = crtc->mode.VDisplay;
    pixman_f_transform_bounds (&f_crtc_to_fb, &crtc->bounds);

    if (damage)
        xf86CrtcDamageShadow (crtc);

    /* All done */
    return TRUE;
}