summaryrefslogtreecommitdiff
path: root/hw/xwin/winpfbdd.c
blob: d9d69039dd917b01fbc31bfe6a213839b4798977 (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
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
/*
 *Copyright (C) 1994-2000 The XFree86 Project, Inc. All Rights Reserved.
 *
 *Permission is hereby granted, free of charge, to any person obtaining
 * a copy of this software and associated documentation files (the
 *"Software"), to deal in the Software without restriction, including
 *without limitation the rights to use, copy, modify, merge, publish,
 *distribute, sublicense, and/or sell copies of the Software, and to
 *permit persons to whom the Software is furnished to do so, subject to
 *the following conditions:
 *
 *The above copyright notice and this permission notice shall be
 *included in all copies or substantial portions of the Software.
 *
 *THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 *EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 *MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 *NONINFRINGEMENT. IN NO EVENT SHALL THE XFREE86 PROJECT BE LIABLE FOR
 *ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
 *CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
 *WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 *
 *Except as contained in this notice, the name of the XFree86 Project
 *shall not be used in advertising or otherwise to promote the sale, use
 *or other dealings in this Software without prior written authorization
 *from the XFree86 Project.
 *
 * Authors:	Dakshinamurthy Karra
 *		Suhaib M Siddiqi
 *		Peter Busch
 *		Harold L Hunt II
 */
/* $XFree86: xc/programs/Xserver/hw/xwin/winpfbdd.c,v 1.17 2002/10/17 08:18:22 alanh Exp $ */

#ifdef HAVE_XWIN_CONFIG_H
#include <xwin-config.h>
#endif
#include "win.h"


/*
 * External symbols
 */

extern const GUID		_IID_IDirectDraw2;
extern HWND			g_hDlgExit;


/*
 * Local function prototypes
 */

static Bool
winAllocateFBPrimaryDD (ScreenPtr pScreen);

static Bool
winCloseScreenPrimaryDD (int nIndex, ScreenPtr pScreen);

static Bool
winInitVisualsPrimaryDD (ScreenPtr pScreen);

static Bool
winAdjustVideoModePrimaryDD (ScreenPtr pScreen);

static Bool
winActivateAppPrimaryDD (ScreenPtr pScreen);

static Bool
winHotKeyAltTabPrimaryDD (ScreenPtr pScreen);


/*
 * Create a DirectDraw primary surface 
 */

static Bool
winAllocateFBPrimaryDD (ScreenPtr pScreen)
{
  winScreenPriv(pScreen);
  winScreenInfo		*pScreenInfo = pScreenPriv->pScreenInfo;  
  HRESULT		ddrval = DD_OK;
  DDSURFACEDESC		ddsd;
  DDSURFACEDESC		*pddsdPrimary = NULL;
  DDSURFACEDESC		*pddsdOffscreen = NULL;
  RECT			rcClient;

  ErrorF ("winAllocateFBPrimaryDD\n");

  /* Get client area location in screen coords */
  GetClientRect (pScreenPriv->hwndScreen, &rcClient);
  MapWindowPoints (pScreenPriv->hwndScreen,
		   HWND_DESKTOP,
		   (LPPOINT)&rcClient, 2);

  /* Create a DirectDraw object, store the address at lpdd */
  ddrval = (*g_fpDirectDrawCreate) (NULL, &pScreenPriv->pdd, NULL);
  if (ddrval != DD_OK)
    FatalError ("winAllocateFBPrimaryDD - Could not start DirectDraw\n");
  
  /* Get a DirectDraw2 interface pointer */
  ddrval = IDirectDraw_QueryInterface (pScreenPriv->pdd,
				       &IID_IDirectDraw2,
				       (LPVOID*) &pScreenPriv->pdd2);
  if (FAILED (ddrval))
    {
      ErrorF ("winAllocateFBShadowDD - Failed DD2 query: %08x\n",
	      (unsigned int) ddrval);
      return FALSE;
    }


  ErrorF ("winAllocateFBPrimaryDD - Created and initialized DD\n");

  /* Are we windowed or fullscreen? */
  if (pScreenInfo->fFullScreen)
    {
      /* Full screen mode */
      ddrval = IDirectDraw2_SetCooperativeLevel (pScreenPriv->pdd2,
						 pScreenPriv->hwndScreen,
						 DDSCL_FULLSCREEN
						 | DDSCL_EXCLUSIVE);
      if (FAILED (ddrval))
	FatalError ("winAllocateFBPrimaryDD - Could not set "
		    "cooperative level\n");

      /* Change the video mode to the mode requested */
      ddrval = IDirectDraw2_SetDisplayMode (pScreenPriv->pdd2,
					    pScreenInfo->dwWidth,
					    pScreenInfo->dwHeight,
					    pScreenInfo->dwBPP,
					    pScreenInfo->dwRefreshRate,
					    0);
       if (FAILED (ddrval))
	FatalError ("winAllocateFBPrimaryDD - Could not set "
		    "full screen display mode\n");
    }
  else
    {
      /* Windowed mode */
      ddrval = IDirectDraw2_SetCooperativeLevel (pScreenPriv->pdd2,
						 pScreenPriv->hwndScreen,
						 DDSCL_NORMAL);
      if (FAILED (ddrval))
	FatalError ("winAllocateFBPrimaryDD - Could not set "
		    "cooperative level\n");
    }

  /* Describe the primary surface */
  ZeroMemory (&ddsd, sizeof (ddsd));
  ddsd.dwSize = sizeof (ddsd);
  ddsd.dwFlags = DDSD_CAPS;
  ddsd.ddsCaps.dwCaps = DDSCAPS_PRIMARYSURFACE;
  
  /* Create the primary surface */
  ddrval = IDirectDraw2_CreateSurface (pScreenPriv->pdd2,
				       &ddsd,
				       &pScreenPriv->pddsPrimary,
				       NULL);
  if (FAILED (ddrval))
       FatalError ("winAllocateFBPrimaryDD - Could not create primary "
		  "surface %08x\n", (unsigned int) ddrval);

  ErrorF ("winAllocateFBPrimaryDD - Created primary\n");

  /* Allocate a DD surface description for our screen privates */
  pddsdPrimary = pScreenPriv->pddsdPrimary
    = malloc (sizeof (DDSURFACEDESC));
  if (pddsdPrimary == NULL)
    FatalError ("winAllocateFBPrimaryDD - Could not allocate surface "
		"description memory\n");
  ZeroMemory (pddsdPrimary, sizeof (*pddsdPrimary));
  pddsdPrimary->dwSize = sizeof (*pddsdPrimary);

  /* Describe the offscreen surface to be created */
  /*
   * NOTE: Do not use a DDSCAPS_VIDEOMEMORY surface,
   * as drawing, locking, and unlocking take forever
   * with video memory surfaces.  In addition,
   * video memory is a somewhat scarce resource,
   * so you shouldn't be allocating video memory when
   * you have the option of using system memory instead.
   */
  ZeroMemory (&ddsd, sizeof (ddsd));
  ddsd.dwSize = sizeof (ddsd);
  ddsd.dwFlags = DDSD_CAPS | DDSD_HEIGHT | DDSD_WIDTH;
  ddsd.ddsCaps.dwCaps = DDSCAPS_OFFSCREENPLAIN | DDSCAPS_SYSTEMMEMORY;
  ddsd.dwHeight = pScreenInfo->dwHeight;
  ddsd.dwWidth = pScreenInfo->dwWidth;

  /* Create the shadow surface */
  ddrval = IDirectDraw2_CreateSurface (pScreenPriv->pdd2,
				       &ddsd,
				       &pScreenPriv->pddsOffscreen,
				       NULL);
  if (ddrval != DD_OK)
    FatalError ("winAllocateFBPrimaryDD - Could not create shadow "
		"surface\n");
  
  ErrorF ("winAllocateFBPrimaryDD - Created offscreen\n");

  /* Allocate a DD surface description for our screen privates */
  pddsdOffscreen = pScreenPriv->pddsdOffscreen
    = malloc (sizeof (DDSURFACEDESC));
  if (pddsdOffscreen == NULL)
    FatalError ("winAllocateFBPrimaryDD - Could not allocate surface "
		"description memory\n");
  ZeroMemory (pddsdOffscreen, sizeof (*pddsdOffscreen));
  pddsdOffscreen->dwSize = sizeof (*pddsdOffscreen);

  ErrorF ("winAllocateFBPrimaryDD - Locking primary\n");

  /* Lock the primary surface */
  ddrval = IDirectDrawSurface2_Lock (pScreenPriv->pddsPrimary,
				    pScreenInfo->fFullScreen ? NULL:&rcClient,
				    pddsdPrimary,
				    DDLOCK_WAIT,
				    NULL);
  if (ddrval != DD_OK || pddsdPrimary->lpSurface == NULL)
    FatalError ("winAllocateFBPrimaryDD - Could not lock "
		"primary surface\n");

  ErrorF ("winAllocateFBPrimaryDD - Locked primary\n");

  /* We don't know how to deal with anything other than RGB */
  if (!(pddsdPrimary->ddpfPixelFormat.dwFlags & DDPF_RGB))
    FatalError ("winAllocateFBPrimaryDD - Color format other than RGB\n");

  /* Grab the pitch from the surface desc */
  pScreenInfo->dwStride = (pddsdPrimary->u1.lPitch * 8)
    / pScreenInfo->dwBPP;

  /* Save the pointer to our surface memory */
  pScreenInfo->pfb = pddsdPrimary->lpSurface;
  
  /* Grab the color depth and masks from the surface description */
  pScreenPriv->dwRedMask = pddsdPrimary->ddpfPixelFormat.u2.dwRBitMask;
  pScreenPriv->dwGreenMask = pddsdPrimary->ddpfPixelFormat.u3.dwGBitMask;
  pScreenPriv->dwBlueMask = pddsdPrimary->ddpfPixelFormat.u4.dwBBitMask;

  ErrorF ("winAllocateFBPrimaryDD - Returning\n");

  return TRUE;
}


/*
 * Call the wrapped CloseScreen function.
 * 
 * Free our resources and private structures.
 */

static Bool
winCloseScreenPrimaryDD (int nIndex, ScreenPtr pScreen)
{
  winScreenPriv(pScreen);
  winScreenInfo		*pScreenInfo = pScreenPriv->pScreenInfo;
  Bool			fReturn;
  
  ErrorF ("winCloseScreenPrimaryDD - Freeing screen resources\n");

  /* Flag that the screen is closed */
  pScreenPriv->fClosed = TRUE;
  pScreenPriv->fActive = FALSE;

  /* Call the wrapped CloseScreen procedure */
  WIN_UNWRAP(CloseScreen);
  fReturn = (*pScreen->CloseScreen) (nIndex, pScreen);

  /* Delete the window property */
  RemoveProp (pScreenPriv->hwndScreen, WIN_SCR_PROP);

  /* Free the offscreen surface, if there is one */
  if (pScreenPriv->pddsOffscreen)
    {
      IDirectDrawSurface2_Unlock (pScreenPriv->pddsOffscreen, NULL);
      IDirectDrawSurface2_Release (pScreenPriv->pddsOffscreen);
      pScreenPriv->pddsOffscreen = NULL;
    }

  /* Release the primary surface, if there is one */
  if (pScreenPriv->pddsPrimary)
    {
      IDirectDrawSurface2_Unlock (pScreenPriv->pddsPrimary, NULL);
      IDirectDrawSurface2_Release (pScreenPriv->pddsPrimary);
      pScreenPriv->pddsPrimary = NULL;
    }

  /* Free the DirectDraw object, if there is one */
  if (pScreenPriv->pdd)
    {
      IDirectDraw2_RestoreDisplayMode (pScreenPriv->pdd);
      IDirectDraw2_Release (pScreenPriv->pdd);
      pScreenPriv->pdd = NULL;
    }

  /* Delete tray icon, if we have one */
  if (!pScreenInfo->fNoTrayIcon)
    winDeleteNotifyIcon (pScreenPriv);

  /* Free the exit confirmation dialog box, if it exists */
  if (g_hDlgExit != NULL)
    {
      DestroyWindow (g_hDlgExit);
      g_hDlgExit = NULL;
    }

  /* Kill our window */
  if (pScreenPriv->hwndScreen)
    {
      DestroyWindow (pScreenPriv->hwndScreen);
      pScreenPriv->hwndScreen = NULL;
    }

  /* Kill our screeninfo's pointer to the screen */
  pScreenInfo->pScreen = NULL;

  /* Invalidate the ScreenInfo's fb pointer */
  pScreenInfo->pfb = NULL;

  /* Free the screen privates for this screen */
  free ((pointer) pScreenPriv);

  return fReturn;
}


/*
 * Tell mi what sort of visuals we need.
 * 
 * Generally we only need one visual, as our screen can only
 * handle one format at a time, I believe.  You may want
 * to verify that last sentence.
 */

static Bool
winInitVisualsPrimaryDD (ScreenPtr pScreen)
{
  winScreenPriv(pScreen);
  winScreenInfo		*pScreenInfo = pScreenPriv->pScreenInfo;
  DWORD			dwRedBits, dwGreenBits, dwBlueBits;

  /* Count the number of ones in each color mask */
  dwRedBits = winCountBits (pScreenPriv->dwRedMask);
  dwGreenBits = winCountBits (pScreenPriv->dwGreenMask);
  dwBlueBits = winCountBits (pScreenPriv->dwBlueMask);
  
  /* Store the maximum number of ones in a color mask as the bitsPerRGB */
  if (dwRedBits > dwGreenBits && dwRedBits > dwBlueBits)
    pScreenPriv->dwBitsPerRGB = dwRedBits;
  else if (dwGreenBits > dwRedBits && dwGreenBits > dwBlueBits)
    pScreenPriv->dwBitsPerRGB = dwGreenBits;
  else
    pScreenPriv->dwBitsPerRGB = dwBlueBits;
  
  ErrorF ("winInitVisualsPrimaryDD - Masks: %08x %08x %08x bpRGB: %d\n",
	  (unsigned int) pScreenPriv->dwRedMask,
	  (unsigned int) pScreenPriv->dwGreenMask,
	  (unsigned int) pScreenPriv->dwBlueMask,
	  (int) pScreenPriv->dwBitsPerRGB);

  /* Create a single visual according to the Windows screen depth */
  switch (pScreenInfo->dwDepth)
    {
    case 24:
    case 16:
    case 15:
      if (!miSetVisualTypesAndMasks (pScreenInfo->dwDepth,
				     TrueColorMask,
				     pScreenPriv->dwBitsPerRGB,
				     TrueColor,
				     pScreenPriv->dwRedMask,
				     pScreenPriv->dwGreenMask,
				     pScreenPriv->dwBlueMask))
	{
	  ErrorF ("winInitVisualsPrimaryDD - " 
		  "miSetVisualTypesAndMasks failed\n");
	  return FALSE;
	}
      break;

    case 8:
#if CYGDEBUG
      winDebug ("winInitVisuals - Calling miSetVisualTypesAndMasks\n");
#endif /* CYGDEBUG */
      if (!miSetVisualTypesAndMasks (pScreenInfo->dwDepth,
				     PseudoColorMask,
				     pScreenPriv->dwBitsPerRGB,
				     PseudoColor,
				     pScreenPriv->dwRedMask,
				     pScreenPriv->dwGreenMask,
				     pScreenPriv->dwBlueMask))
	{
	  ErrorF ("winInitVisualsPrimaryDD - "
		  "miSetVisualTypesAndMasks failed\n");
	  return FALSE;
	}
#if CYGDEBUG
      winDebug ("winInitVisualsPrimaryDD - Returned from "
	      "miSetVisualTypesAndMasks\n");
#endif /* CYGDEBUG */
      break;

    default:
      ErrorF ("winInitVisualsPrimaryDD - Unknown screen depth\n");
      return FALSE;
    }

  ErrorF ("winInitVisualsPrimaryDD - Returning\n");

  return TRUE;
}


static Bool
winAdjustVideoModePrimaryDD (ScreenPtr pScreen)
{
  winScreenPriv(pScreen);
  winScreenInfo		*pScreenInfo = pScreenPriv->pScreenInfo;
  HDC			hdc = NULL;
  DWORD			dwBPP;

  /* We're in serious trouble if we can't get a DC */
  hdc = GetDC (NULL);
  if (hdc == NULL)
    {
      ErrorF ("winAdjustVideoModePrimaryDD - GetDC failed\n");
      return FALSE;
    }

  /* Query GDI for current display depth */
  dwBPP = GetDeviceCaps (hdc, BITSPIXEL);

  /* DirectDraw can only change the depth in fullscreen mode */
  if (pScreenInfo->dwBPP == WIN_DEFAULT_BPP)
    {
      /* No -depth parameter passed, let the user know the depth being used */
      ErrorF ("winAdjustVideoModePrimaryDD - Using Windows display "
	      "depth of %d bits per pixel\n", (int) dwBPP);

      /* Use GDI's depth */
      pScreenInfo->dwBPP = dwBPP;
    }
  else if (pScreenInfo->fFullScreen
	   && pScreenInfo->dwBPP != dwBPP)
    {
      /* FullScreen, and GDI depth differs from -depth parameter */
      ErrorF ("winAdjustVideoModePrimaryDD - FullScreen, using command "
	      "line depth: %d\n", (int) pScreenInfo->dwBPP);
    }
  else if (dwBPP != pScreenInfo->dwBPP)
    {
      /* Windowed, and GDI depth differs from -depth parameter */
      ErrorF ("winAdjustVideoModePrimaryDD - Windowed, command line "
	      "depth: %d, using depth: %d\n",
	      (int) pScreenInfo->dwBPP, (int) dwBPP);

      /* We'll use GDI's depth */
      pScreenInfo->dwBPP = dwBPP;
    }
  
  /* Release our DC */
  ReleaseDC (NULL, hdc);

  return TRUE;
}


/*
 * We need to blit our offscreen fb to
 * the screen when we are activated, and we need to point
 * the fb code back to the primary surface memory.
 */

static Bool
winActivateAppPrimaryDD (ScreenPtr pScreen)
{
  winScreenPriv(pScreen);
  winScreenInfo		*pScreenInfo = pScreenPriv->pScreenInfo;
  RECT			rcSrc, rcClient;
  HRESULT		ddrval = DD_OK;

  /* Check for errors */
  if (pScreenPriv == NULL
      || pScreenPriv->pddsPrimary == NULL
      || pScreenPriv->pddsOffscreen == NULL)
    return FALSE;

  /* Check for do-nothing */
  if (!pScreenPriv->fActive)
    return TRUE;
  
  /* We are activating */
  ddrval = IDirectDrawSurface2_IsLost (pScreenPriv->pddsOffscreen);
  if (ddrval == DD_OK)
    {
      IDirectDrawSurface2_Unlock (pScreenPriv->pddsOffscreen,
				  NULL);
      /*
       * We don't check for an error from Unlock, because it
       * doesn't matter if the Unlock failed.
       */
    }

  /* Restore both surfaces, just cause I like it that way */
  IDirectDrawSurface2_Restore (pScreenPriv->pddsOffscreen);
  IDirectDrawSurface2_Restore (pScreenPriv->pddsPrimary);
			      
  /* Get client area in screen coords */
  GetClientRect (pScreenPriv->hwndScreen, &rcClient);
  MapWindowPoints (pScreenPriv->hwndScreen,
		   HWND_DESKTOP,
		   (LPPOINT)&rcClient, 2);

  /* Setup a source rectangle */
  rcSrc.left = 0;
  rcSrc.top = 0;
  rcSrc.right = pScreenInfo->dwWidth;
  rcSrc.bottom = pScreenInfo->dwHeight;

  ddrval = IDirectDrawSurface2_Blt (pScreenPriv->pddsPrimary,
				    &rcClient,
				    pScreenPriv->pddsOffscreen,
				    &rcSrc,
				    DDBLT_WAIT,
				    NULL);
  if (ddrval != DD_OK)
    FatalError ("winActivateAppPrimaryDD () - Failed blitting offscreen "
		"surface to primary surface %08x\n", (unsigned int) ddrval);
  
  /* Lock the primary surface */
  ddrval = IDirectDrawSurface2_Lock (pScreenPriv->pddsPrimary,
				     &rcClient,
				     pScreenPriv->pddsdPrimary,
				     DDLOCK_WAIT,
				     NULL);
  if (ddrval != DD_OK
      || pScreenPriv->pddsdPrimary->lpSurface == NULL)
    FatalError ("winActivateAppPrimaryDD () - Could not lock "
		"primary surface\n");

  /* Notify FB of the new memory pointer */
  winUpdateFBPointer (pScreen,
		      pScreenPriv->pddsdPrimary->lpSurface);

  /*
   * Register the Alt-Tab combo as a hotkey so we can copy
   * the primary framebuffer before the display mode changes
   */
  RegisterHotKey (pScreenPriv->hwndScreen, 1, MOD_ALT, 9);

  return TRUE;
}


/*
 * Handle the Alt+Tab hotkey.
 *
 * We need to save the primary fb to an offscreen fb when
 * we get deactivated, and point the fb code at the offscreen
 * fb for the duration of the deactivation.
 */

static Bool
winHotKeyAltTabPrimaryDD (ScreenPtr pScreen)
{
  winScreenPriv(pScreen);
  winScreenInfo		*pScreenInfo = pScreenPriv->pScreenInfo;
  RECT			rcClient, rcSrc;
  HRESULT		ddrval = DD_OK;

  ErrorF ("\nwinHotKeyAltTabPrimaryDD\n\n");

  /* Alt+Tab was pressed, we will lose focus very soon */
  pScreenPriv->fActive = FALSE;
  
  /* Check for error conditions */
  if (pScreenPriv->pddsPrimary == NULL
      || pScreenPriv->pddsOffscreen == NULL)
    return FALSE;

  /* Get client area in screen coords */
  GetClientRect (pScreenPriv->hwndScreen, &rcClient);
  MapWindowPoints (pScreenPriv->hwndScreen,
		   HWND_DESKTOP,
		   (LPPOINT)&rcClient, 2);

  /* Did we loose the primary surface? */
  ddrval = IDirectDrawSurface2_IsLost (pScreenPriv->pddsPrimary);
  if (ddrval == DD_OK)
    {
      ddrval = IDirectDrawSurface2_Unlock (pScreenPriv->pddsPrimary,
					   NULL);
      if (FAILED (ddrval))
	FatalError ("winHotKeyAltTabPrimaryDD - Failed unlocking primary "
		    "surface\n");
    }

  /* Setup a source rectangle */
  rcSrc.left = 0;
  rcSrc.top = 0;
  rcSrc.right = pScreenInfo->dwWidth;
  rcSrc.bottom = pScreenInfo->dwHeight;

      /* Blit the primary surface to the offscreen surface */
  ddrval = IDirectDrawSurface2_Blt (pScreenPriv->pddsOffscreen,
				    NULL, /* should be rcDest */
				    pScreenPriv->pddsPrimary,
				    NULL,
				    DDBLT_WAIT,
				    NULL);
  if (ddrval == DDERR_SURFACELOST)
    {
      IDirectDrawSurface2_Restore (pScreenPriv->pddsOffscreen);  
      IDirectDrawSurface2_Restore (pScreenPriv->pddsPrimary);
		  		  
      /* Blit the primary surface to the offscreen surface */
      ddrval = IDirectDrawSurface2_Blt (pScreenPriv->pddsOffscreen,
					NULL,
					pScreenPriv->pddsPrimary,
					NULL,
					DDBLT_WAIT,
					NULL);
      if (FAILED (ddrval))
	FatalError ("winHotKeyAltTabPrimaryDD - Failed blitting primary "
		    "surface to offscreen surface: %08x\n",
		    (unsigned int) ddrval);
    }
  else
    {
      FatalError ("winHotKeyAltTabPrimaryDD - Unknown error from "
		  "Blt: %08dx\n", (unsigned int) ddrval);
    }

  /* Lock the offscreen surface */
  ddrval = IDirectDrawSurface2_Lock (pScreenPriv->pddsOffscreen,
				     NULL,
				     pScreenPriv->pddsdOffscreen,
				     DDLOCK_WAIT,
				     NULL);
  if (ddrval != DD_OK
      || pScreenPriv->pddsdPrimary->lpSurface == NULL)
    FatalError ("winHotKeyAltTabPrimaryDD - Could not lock "
		"offscreen surface\n");

  /* Notify FB of the new memory pointer */
  winUpdateFBPointer (pScreen,
		      pScreenPriv->pddsdOffscreen->lpSurface);

  /* Unregister our hotkey */
  UnregisterHotKey (pScreenPriv->hwndScreen, 1);

  return TRUE;
}


/* Set engine specific functions */
Bool
winSetEngineFunctionsPrimaryDD (ScreenPtr pScreen)
{
  winScreenPriv(pScreen);
  winScreenInfo		*pScreenInfo = pScreenPriv->pScreenInfo;
  
  /* Set our pointers */
  pScreenPriv->pwinAllocateFB = winAllocateFBPrimaryDD;
  pScreenPriv->pwinShadowUpdate
    = (winShadowUpdateProcPtr) (void (*)(void))NoopDDA;
  pScreenPriv->pwinCloseScreen = winCloseScreenPrimaryDD;
  pScreenPriv->pwinInitVisuals = winInitVisualsPrimaryDD;
  pScreenPriv->pwinAdjustVideoMode = winAdjustVideoModePrimaryDD;
  if (pScreenInfo->fFullScreen)
    pScreenPriv->pwinCreateBoundingWindow = winCreateBoundingWindowFullScreen;
  else
    pScreenPriv->pwinCreateBoundingWindow = winCreateBoundingWindowWindowed;
  pScreenPriv->pwinFinishScreenInit = winFinishScreenInitFB;
  pScreenPriv->pwinBltExposedRegions
    = (winBltExposedRegionsProcPtr) (void (*)(void))NoopDDA;
  pScreenPriv->pwinActivateApp = winActivateAppPrimaryDD;
  pScreenPriv->pwinHotKeyAltTab = winHotKeyAltTabPrimaryDD;
#ifdef XWIN_MULTIWINDOW
  pScreenPriv->pwinFinishCreateWindowsWindow =
    (winFinishCreateWindowsWindowProcPtr) (void (*)(void))NoopDDA;
#endif

  return TRUE;
}