aboutsummaryrefslogtreecommitdiff
path: root/xorg-server/include/scrnintstr.h
blob: 6955e77fddd5a0d91722ca89dca96c1108a8a5f5 (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
/***********************************************************

Copyright 1987, 1998  The Open Group

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.

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
OPEN GROUP 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 Open Group 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 Open Group.

Copyright 1987 by Digital Equipment Corporation, Maynard, Massachusetts.

                        All Rights Reserved

Permission to use, copy, modify, and distribute this software and its 
documentation for any purpose and without fee is hereby granted, 
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 Digital not be
used in advertising or publicity pertaining to distribution of the
software without specific, written prior permission.  

DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
DIGITAL 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.

******************************************************************/

#ifndef SCREENINTSTRUCT_H
#define SCREENINTSTRUCT_H

#include "screenint.h"
#include "regionstr.h"
#include "colormap.h"
#include "cursor.h"
#include "validate.h"
#include <X11/Xproto.h>
#include "dix.h"
#include "privates.h"

typedef struct _PixmapFormat {
    unsigned char depth;
    unsigned char bitsPerPixel;
    unsigned char scanlinePad;
} PixmapFormatRec;

typedef struct _Visual {
    VisualID vid;
    short class;
    short bitsPerRGBValue;
    short ColormapEntries;
    short nplanes;              /* = log2 (ColormapEntries). This does not
                                 * imply that the screen has this many planes.
                                 * it may have more or fewer */
    unsigned long redMask, greenMask, blueMask;
    int offsetRed, offsetGreen, offsetBlue;
} VisualRec;

typedef struct _Depth {
    unsigned char depth;
    short numVids;
    VisualID *vids;             /* block of visual ids for this depth */
} DepthRec;

typedef struct _ScreenSaverStuff {
    WindowPtr pWindow;
    XID wid;
    char blanked;
    Bool (*ExternalScreenSaver) (ScreenPtr /*pScreen */ ,
                                 int /*xstate */ ,
                                 Bool /*force */ );
} ScreenSaverStuffRec;

/*
 *  There is a typedef for each screen function pointer so that code that
 *  needs to declare a screen function pointer (e.g. in a screen private
 *  or as a local variable) can easily do so and retain full type checking.
 */

typedef Bool (*CloseScreenProcPtr) (ScreenPtr /*pScreen */ );

typedef void (*QueryBestSizeProcPtr) (int /*class */ ,
                                      unsigned short * /*pwidth */ ,
                                      unsigned short * /*pheight */ ,
                                      ScreenPtr /*pScreen */ );

typedef Bool (*SaveScreenProcPtr) (ScreenPtr /*pScreen */ ,
                                   int /*on */ );

typedef void (*GetImageProcPtr) (DrawablePtr /*pDrawable */ ,
                                 int /*sx */ ,
                                 int /*sy */ ,
                                 int /*w */ ,
                                 int /*h */ ,
                                 unsigned int /*format */ ,
                                 unsigned long /*planeMask */ ,
                                 char * /*pdstLine */ );

typedef void (*GetSpansProcPtr) (DrawablePtr /*pDrawable */ ,
                                 int /*wMax */ ,
                                 DDXPointPtr /*ppt */ ,
                                 int * /*pwidth */ ,
                                 int /*nspans */ ,
                                 char * /*pdstStart */ );

typedef void (*SourceValidateProcPtr) (DrawablePtr /*pDrawable */ ,
                                       int /*x */ ,
                                       int /*y */ ,
                                       int /*width */ ,
                                       int /*height */ ,
                                       unsigned int /*subWindowMode */ );

typedef Bool (*CreateWindowProcPtr) (WindowPtr /*pWindow */ );

typedef Bool (*DestroyWindowProcPtr) (WindowPtr /*pWindow */ );

typedef Bool (*PositionWindowProcPtr) (WindowPtr /*pWindow */ ,
                                       int /*x */ ,
                                       int /*y */ );

typedef Bool (*ChangeWindowAttributesProcPtr) (WindowPtr /*pWindow */ ,
                                               unsigned long /*mask */ );

typedef Bool (*RealizeWindowProcPtr) (WindowPtr /*pWindow */ );

typedef Bool (*UnrealizeWindowProcPtr) (WindowPtr /*pWindow */ );

typedef void (*RestackWindowProcPtr) (WindowPtr /*pWindow */ ,
                                      WindowPtr /*pOldNextSib */ );

typedef int (*ValidateTreeProcPtr) (WindowPtr /*pParent */ ,
                                    WindowPtr /*pChild */ ,
                                    VTKind /*kind */ );

typedef void (*PostValidateTreeProcPtr) (WindowPtr /*pParent */ ,
                                         WindowPtr /*pChild */ ,
                                         VTKind /*kind */ );

typedef void (*WindowExposuresProcPtr) (WindowPtr /*pWindow */ ,
                                        RegionPtr /*prgn */ ,
                                        RegionPtr /*other_exposed */ );

typedef void (*CopyWindowProcPtr) (WindowPtr /*pWindow */ ,
                                   DDXPointRec /*ptOldOrg */ ,
                                   RegionPtr /*prgnSrc */ );

typedef void (*ClearToBackgroundProcPtr) (WindowPtr /*pWindow */ ,
                                          int /*x */ ,
                                          int /*y */ ,
                                          int /*w */ ,
                                          int /*h */ ,
                                          Bool /*generateExposures */ );

typedef void (*ClipNotifyProcPtr) (WindowPtr /*pWindow */ ,
                                   int /*dx */ ,
                                   int /*dy */ );

/* pixmap will exist only for the duration of the current rendering operation */
#define CREATE_PIXMAP_USAGE_SCRATCH                     1
/* pixmap will be the backing pixmap for a redirected window */
#define CREATE_PIXMAP_USAGE_BACKING_PIXMAP              2
/* pixmap will contain a glyph */
#define CREATE_PIXMAP_USAGE_GLYPH_PICTURE               3
/* pixmap will be shared */
#define CREATE_PIXMAP_USAGE_SHARED                      4

typedef PixmapPtr (*CreatePixmapProcPtr) (ScreenPtr /*pScreen */ ,
                                          int /*width */ ,
                                          int /*height */ ,
                                          int /*depth */ ,
                                          unsigned /*usage_hint */ );

typedef Bool (*DestroyPixmapProcPtr) (PixmapPtr /*pPixmap */ );

typedef Bool (*RealizeFontProcPtr) (ScreenPtr /*pScreen */ ,
                                    FontPtr /*pFont */ );

typedef Bool (*UnrealizeFontProcPtr) (ScreenPtr /*pScreen */ ,
                                      FontPtr /*pFont */ );

typedef void (*ConstrainCursorProcPtr) (DeviceIntPtr /*pDev */ ,
                                        ScreenPtr /*pScreen */ ,
                                        BoxPtr /*pBox */ );

typedef void (*CursorLimitsProcPtr) (DeviceIntPtr /* pDev */ ,
                                     ScreenPtr /*pScreen */ ,
                                     CursorPtr /*pCursor */ ,
                                     BoxPtr /*pHotBox */ ,
                                     BoxPtr /*pTopLeftBox */ );

typedef Bool (*DisplayCursorProcPtr) (DeviceIntPtr /* pDev */ ,
                                      ScreenPtr /*pScreen */ ,
                                      CursorPtr /*pCursor */ );

typedef Bool (*RealizeCursorProcPtr) (DeviceIntPtr /* pDev */ ,
                                      ScreenPtr /*pScreen */ ,
                                      CursorPtr /*pCursor */ );

typedef Bool (*UnrealizeCursorProcPtr) (DeviceIntPtr /* pDev */ ,
                                        ScreenPtr /*pScreen */ ,
                                        CursorPtr /*pCursor */ );

typedef void (*RecolorCursorProcPtr) (DeviceIntPtr /* pDev */ ,
                                      ScreenPtr /*pScreen */ ,
                                      CursorPtr /*pCursor */ ,
                                      Bool /*displayed */ );

typedef Bool (*SetCursorPositionProcPtr) (DeviceIntPtr /* pDev */ ,
                                          ScreenPtr /*pScreen */ ,
                                          int /*x */ ,
                                          int /*y */ ,
                                          Bool /*generateEvent */ );

typedef Bool (*CreateGCProcPtr) (GCPtr /*pGC */ );

typedef Bool (*CreateColormapProcPtr) (ColormapPtr /*pColormap */ );

typedef void (*DestroyColormapProcPtr) (ColormapPtr /*pColormap */ );

typedef void (*InstallColormapProcPtr) (ColormapPtr /*pColormap */ );

typedef void (*UninstallColormapProcPtr) (ColormapPtr /*pColormap */ );

typedef int (*ListInstalledColormapsProcPtr) (ScreenPtr /*pScreen */ ,
                                              XID * /*pmaps */ );

typedef void (*StoreColorsProcPtr) (ColormapPtr /*pColormap */ ,
                                    int /*ndef */ ,
                                    xColorItem * /*pdef */ );

typedef void (*ResolveColorProcPtr) (unsigned short * /*pred */ ,
                                     unsigned short * /*pgreen */ ,
                                     unsigned short * /*pblue */ ,
                                     VisualPtr /*pVisual */ );

typedef RegionPtr (*BitmapToRegionProcPtr) (PixmapPtr /*pPix */ );

typedef void (*SendGraphicsExposeProcPtr) (ClientPtr /*client */ ,
                                           RegionPtr /*pRgn */ ,
                                           XID /*drawable */ ,
                                           int /*major */ ,
                                           int /*minor */ );

typedef void (*ScreenBlockHandlerProcPtr) (ScreenPtr pScreen,
                                           void *pTimeout,
                                           void *pReadmask);

typedef void (*ScreenWakeupHandlerProcPtr) (ScreenPtr pScreen,
                                            unsigned long result,
                                            void *pReadMask);

typedef Bool (*CreateScreenResourcesProcPtr) (ScreenPtr /*pScreen */ );

typedef Bool (*ModifyPixmapHeaderProcPtr) (PixmapPtr pPixmap,
                                           int width,
                                           int height,
                                           int depth,
                                           int bitsPerPixel,
                                           int devKind,
                                           void *pPixData);

typedef PixmapPtr (*GetWindowPixmapProcPtr) (WindowPtr /*pWin */ );

typedef void (*SetWindowPixmapProcPtr) (WindowPtr /*pWin */ ,
                                        PixmapPtr /*pPix */ );

typedef PixmapPtr (*GetScreenPixmapProcPtr) (ScreenPtr /*pScreen */ );

typedef void (*SetScreenPixmapProcPtr) (PixmapPtr /*pPix */ );

typedef void (*MarkWindowProcPtr) (WindowPtr /*pWin */ );

typedef Bool (*MarkOverlappedWindowsProcPtr) (WindowPtr /*parent */ ,
                                              WindowPtr /*firstChild */ ,
                                              WindowPtr * /*pLayerWin */ );

typedef int (*ConfigNotifyProcPtr) (WindowPtr /*pWin */ ,
                                    int /*x */ ,
                                    int /*y */ ,
                                    int /*w */ ,
                                    int /*h */ ,
                                    int /*bw */ ,
                                    WindowPtr /*pSib */ );

typedef void (*MoveWindowProcPtr) (WindowPtr /*pWin */ ,
                                   int /*x */ ,
                                   int /*y */ ,
                                   WindowPtr /*pSib */ ,
                                   VTKind /*kind */ );

typedef void (*ResizeWindowProcPtr) (WindowPtr /*pWin */ ,
                                     int /*x */ ,
                                     int /*y */ ,
                                     unsigned int /*w */ ,
                                     unsigned int /*h */ ,
                                     WindowPtr  /*pSib */
    );

typedef WindowPtr (*GetLayerWindowProcPtr) (WindowPtr   /*pWin */
    );

typedef void (*HandleExposuresProcPtr) (WindowPtr /*pWin */ );

typedef void (*ReparentWindowProcPtr) (WindowPtr /*pWin */ ,
                                       WindowPtr /*pPriorParent */ );

typedef void (*SetShapeProcPtr) (WindowPtr /*pWin */ ,
                                 int /* kind */ );

typedef void (*ChangeBorderWidthProcPtr) (WindowPtr /*pWin */ ,
                                          unsigned int /*width */ );

typedef void (*MarkUnrealizedWindowProcPtr) (WindowPtr /*pChild */ ,
                                             WindowPtr /*pWin */ ,
                                             Bool /*fromConfigure */ );

typedef Bool (*DeviceCursorInitializeProcPtr) (DeviceIntPtr /* pDev */ ,
                                               ScreenPtr /* pScreen */ );

typedef void (*DeviceCursorCleanupProcPtr) (DeviceIntPtr /* pDev */ ,
                                            ScreenPtr /* pScreen */ );

typedef void (*ConstrainCursorHarderProcPtr) (DeviceIntPtr, ScreenPtr, int,
                                              int *, int *);


typedef Bool (*SharePixmapBackingProcPtr)(PixmapPtr, ScreenPtr, void **);

typedef Bool (*SetSharedPixmapBackingProcPtr)(PixmapPtr, void *);

typedef Bool (*StartPixmapTrackingProcPtr)(PixmapPtr, PixmapPtr,
                                           int x, int y);

typedef Bool (*StopPixmapTrackingProcPtr)(PixmapPtr, PixmapPtr);

typedef Bool (*ReplaceScanoutPixmapProcPtr)(DrawablePtr, PixmapPtr, Bool);

typedef WindowPtr (*XYToWindowProcPtr)(ScreenPtr pScreen,
                                       SpritePtr pSprite, int x, int y);

typedef int (*NameWindowPixmapProcPtr)(WindowPtr, PixmapPtr, CARD32);

/* Wrapping Screen procedures

   There are a few modules in the X server which dynamically add and
    remove themselves from various screen procedure call chains.

    For example, the BlockHandler is dynamically modified by:

     * xf86Rotate
     * miSprite
     * composite
     * render (for animated cursors)

    Correctly manipulating this chain is complicated by the fact that
    the chain is constructed through a sequence of screen private
    structures, each holding the next screen->proc pointer.

    To add a module to a screen->proc chain is fairly simple; just save
    the current screen->proc value in the module screen private
    and store the module's function in the screen->proc location.

    Removing a screen proc is a bit trickier. It seems like all you
    need to do is set the screen->proc pointer back to the value saved
    in your screen private. However, if some other module has come
    along and wrapped on top of you, then the right place to store the
    previous screen->proc value is actually in the wrapping module's
    screen private structure(!). Of course, you have no idea what
    other module may have wrapped on top, nor could you poke inside
    its screen private in any case.

    To make this work, we restrict the unwrapping process to happen
    during the invocation of the screen proc itself, and then we
    require the screen proc to take some care when manipulating the
    screen proc functions pointers.

    The requirements are:

     1) The screen proc must set the screen->proc pointer back to the
        value saved in its screen private before calling outside its
        module.

     2a) If the screen proc wants to be remove itself from the chain,
         it must not manipulate screen->proc pointer again before
         returning.

     2b) If the screen proc wants to remain in the chain, it must:

       2b.1) Re-fetch the screen->proc pointer and store that in
             its screen private. This ensures that any changes
             to the chain will be preserved.

       2b.2) Set screen->proc back to itself

    One key requirement here is that these steps must wrap not just
    any invocation of the nested screen->proc value, but must nest
    essentially any calls outside the current module. This ensures
    that other modules can reliably manipulate screen->proc wrapping
    using these same rules.

    For example, the animated cursor code in render has two macros,
    Wrap and Unwrap.

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

    Unwrap takes the screen private (as), the screen (s) and the
    member name (elt), and restores screen->proc to that saved in the
    screen private.

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

    Wrap takes the screen private (as), the screen (s), the member
    name (elt) and the wrapping function (func). It saves the
    current screen->proc value in the screen private, and then sets the
    screen->proc to the local wrapping function.

    Within each of these functions, there's a pretty simple pattern:

        Unwrap(as, pScreen, UnrealizeCursor);

        // Do local stuff, including possibly calling down through
        // pScreen->UnrealizeCursor

        Wrap(as, pScreen, UnrealizeCursor, AnimCurUnrealizeCursor);

    The wrapping block handler is a bit different; it does the Unwrap,
    the local operations and then only re-Wraps if the hook is still
    required. Unwrap occurrs at the top of each function, just after
    entry, and Wrap occurrs at the bottom of each function, just
    before returning.
 */

typedef struct _Screen {
    int myNum;                  /* index of this instance in Screens[] */
    ATOM id;
    short x, y, width, height;
    short mmWidth, mmHeight;
    short numDepths;
    unsigned char rootDepth;
    DepthPtr allowedDepths;
    unsigned long rootVisual;
    unsigned long defColormap;
    short minInstalledCmaps, maxInstalledCmaps;
    char backingStoreSupport, saveUnderSupport;
    unsigned long whitePixel, blackPixel;
    GCPtr GCperDepth[MAXFORMATS + 1];
    /* next field is a stipple to use as default in
       a GC.  we don't build default tiles of all depths
       because they are likely to be of a color
       different from the default fg pixel, so
       we don't win anything by building
       a standard one.
     */
    PixmapPtr PixmapPerDepth[1];
    void *devPrivate;
    short numVisuals;
    VisualPtr visuals;
    WindowPtr root;
    ScreenSaverStuffRec screensaver;

    DevPrivateSetRec    screenSpecificPrivates[PRIVATE_LAST];

    /* Random screen procedures */

    CloseScreenProcPtr CloseScreen;
    QueryBestSizeProcPtr QueryBestSize;
    SaveScreenProcPtr SaveScreen;
    GetImageProcPtr GetImage;
    GetSpansProcPtr GetSpans;
    SourceValidateProcPtr SourceValidate;

    /* Window Procedures */

    CreateWindowProcPtr CreateWindow;
    DestroyWindowProcPtr DestroyWindow;
    PositionWindowProcPtr PositionWindow;
    ChangeWindowAttributesProcPtr ChangeWindowAttributes;
    RealizeWindowProcPtr RealizeWindow;
    UnrealizeWindowProcPtr UnrealizeWindow;
    ValidateTreeProcPtr ValidateTree;
    PostValidateTreeProcPtr PostValidateTree;
    WindowExposuresProcPtr WindowExposures;
    CopyWindowProcPtr CopyWindow;
    ClearToBackgroundProcPtr ClearToBackground;
    ClipNotifyProcPtr ClipNotify;
    RestackWindowProcPtr RestackWindow;

    /* Pixmap procedures */

    CreatePixmapProcPtr CreatePixmap;
    DestroyPixmapProcPtr DestroyPixmap;

    /* Font procedures */

    RealizeFontProcPtr RealizeFont;
    UnrealizeFontProcPtr UnrealizeFont;

    /* Cursor Procedures */

    ConstrainCursorProcPtr ConstrainCursor;
    ConstrainCursorHarderProcPtr ConstrainCursorHarder;
    CursorLimitsProcPtr CursorLimits;
    DisplayCursorProcPtr DisplayCursor;
    RealizeCursorProcPtr RealizeCursor;
    UnrealizeCursorProcPtr UnrealizeCursor;
    RecolorCursorProcPtr RecolorCursor;
    SetCursorPositionProcPtr SetCursorPosition;

    /* GC procedures */

    CreateGCProcPtr CreateGC;

    /* Colormap procedures */

    CreateColormapProcPtr CreateColormap;
    DestroyColormapProcPtr DestroyColormap;
    InstallColormapProcPtr InstallColormap;
    UninstallColormapProcPtr UninstallColormap;
    ListInstalledColormapsProcPtr ListInstalledColormaps;
    StoreColorsProcPtr StoreColors;
    ResolveColorProcPtr ResolveColor;

    /* Region procedures */

    BitmapToRegionProcPtr BitmapToRegion;
    SendGraphicsExposeProcPtr SendGraphicsExpose;

    /* os layer procedures */

    ScreenBlockHandlerProcPtr BlockHandler;
    ScreenWakeupHandlerProcPtr WakeupHandler;

    /* anybody can get a piece of this array */
    PrivateRec *devPrivates;

    CreateScreenResourcesProcPtr CreateScreenResources;
    ModifyPixmapHeaderProcPtr ModifyPixmapHeader;

    GetWindowPixmapProcPtr GetWindowPixmap;
    SetWindowPixmapProcPtr SetWindowPixmap;
    GetScreenPixmapProcPtr GetScreenPixmap;
    SetScreenPixmapProcPtr SetScreenPixmap;
    NameWindowPixmapProcPtr NameWindowPixmap;

    PixmapPtr pScratchPixmap;   /* scratch pixmap "pool" */

    unsigned int totalPixmapSize;

    MarkWindowProcPtr MarkWindow;
    MarkOverlappedWindowsProcPtr MarkOverlappedWindows;
    ConfigNotifyProcPtr ConfigNotify;
    MoveWindowProcPtr MoveWindow;
    ResizeWindowProcPtr ResizeWindow;
    GetLayerWindowProcPtr GetLayerWindow;
    HandleExposuresProcPtr HandleExposures;
    ReparentWindowProcPtr ReparentWindow;

    SetShapeProcPtr SetShape;

    ChangeBorderWidthProcPtr ChangeBorderWidth;
    MarkUnrealizedWindowProcPtr MarkUnrealizedWindow;

    /* Device cursor procedures */
    DeviceCursorInitializeProcPtr DeviceCursorInitialize;
    DeviceCursorCleanupProcPtr DeviceCursorCleanup;

    /* set it in driver side if X server can copy the framebuffer content.
     * Meant to be used together with '-background none' option, avoiding
     * malicious users to steal framebuffer's content if that would be the
     * default */
    Bool canDoBGNoneRoot;

    Bool isGPU;

    struct xorg_list unattached_list;
    struct xorg_list unattached_head;

    ScreenPtr current_master;

    struct xorg_list output_slave_list;
    struct xorg_list output_head;

    SharePixmapBackingProcPtr SharePixmapBacking;
    SetSharedPixmapBackingProcPtr SetSharedPixmapBacking;

    StartPixmapTrackingProcPtr StartPixmapTracking;
    StopPixmapTrackingProcPtr StopPixmapTracking;

    struct xorg_list pixmap_dirty_list;
    struct xorg_list offload_slave_list;
    struct xorg_list offload_head;

    ReplaceScanoutPixmapProcPtr ReplaceScanoutPixmap;
    XYToWindowProcPtr XYToWindow;
} ScreenRec;

static inline RegionPtr
BitmapToRegion(ScreenPtr _pScreen, PixmapPtr pPix)
{
    return (*(_pScreen)->BitmapToRegion) (pPix);        /* no mi version?! */
}

typedef struct _ScreenInfo {
    int imageByteOrder;
    int bitmapScanlineUnit;
    int bitmapScanlinePad;
    int bitmapBitOrder;
    int numPixmapFormats;
     PixmapFormatRec formats[MAXFORMATS];
    int numScreens;
    ScreenPtr screens[MAXSCREENS];
    int numGPUScreens;
    ScreenPtr gpuscreens[MAXGPUSCREENS];
    int x;                      /* origin */
    int y;                      /* origin */
    int width;                  /* total width of all screens together */
    int height;                 /* total height of all screens together */
} ScreenInfo;

extern _X_EXPORT ScreenInfo screenInfo;

extern _X_EXPORT void InitOutput(ScreenInfo * /*pScreenInfo */ ,
                                 int /*argc */ ,
                                 char ** /*argv */ );

#endif                          /* SCREENINTSTRUCT_H */