summaryrefslogtreecommitdiff
path: root/src/gallium/winsys/egl_xlib/egl_xlib.c
blob: 829732eea8b44e5706904b0ac8a24c34fe23b445 (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
/**************************************************************************
 * 
 * Copyright 2008 Tungsten Graphics, Inc., Cedar Park, Texas.
 * 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, sub license, 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 (including the
 * next paragraph) 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 NON-INFRINGEMENT.
 * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS 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.
 * 
 **************************************************************************/

/**
 * EGL / softpipe / xlib winsys module
 *
 * Authors: Brian Paul
 */


#include <dlfcn.h>
#include <X11/Xutil.h>

#include "pipe/p_compiler.h"
#include "pipe/p_format.h"
#include "pipe/p_state.h"
#include "pipe/p_util.h"
#include "pipe/p_winsys.h"
#include "softpipe/sp_winsys.h"

#include "eglconfig.h"
#include "eglconfigutil.h"
#include "eglcontext.h"
#include "egldisplay.h"
#include "egldriver.h"
#include "eglglobals.h"
#include "egllog.h"
#include "eglsurface.h"

#include "state_tracker/st_public.h"

#include "sw_winsys.h"


/** subclass of _EGLDriver */
struct xlib_egl_driver
{
   _EGLDriver Base;   /**< base class */

   struct pipe_winsys *winsys;
   struct pipe_screen *screen;
};


/** subclass of _EGLContext */
struct xlib_egl_context
{
   _EGLContext Base;   /**< base class */

   struct pipe_context *pipe;   /**< Gallium driver context */
   struct st_context *Context;  /**< Mesa/gallium state tracker context */
};


/** subclass of _EGLSurface */
struct xlib_egl_surface
{
   _EGLSurface Base;   /**< base class */

   Display *Dpy;  /**< The X Display of the window */
   Window Win;    /**< The user-created window ID */
   GC Gc;
   XVisualInfo VisInfo;

   struct pipe_winsys *winsys;

   struct st_framebuffer *Framebuffer;
};


/** cast wrapper */
static INLINE struct xlib_egl_driver *
xlib_egl_driver(_EGLDriver *drv)
{
   return (struct xlib_egl_driver *) drv;
}


static struct xlib_egl_surface *
lookup_surface(EGLSurface surf)
{
   _EGLSurface *surface = _eglLookupSurface(surf);
   return (struct xlib_egl_surface *) surface;
}


static struct xlib_egl_context *
lookup_context(EGLContext surf)
{
   _EGLContext *context = _eglLookupContext(surf);
   return (struct xlib_egl_context *) context;
}


static unsigned int
bitcount(unsigned int n)
{
   unsigned int bits;
   for (bits = 0; n > 0; n = n >> 1) {
      bits += (n & 1);
   }
   return bits;
}


/**
 * Create the EGLConfigs.  (one per X visual)
 */
static void
create_configs(_EGLDriver *drv, EGLDisplay dpy)
{
   static const EGLint all_apis = (EGL_OPENGL_ES_BIT |
                                   EGL_OPENGL_ES2_BIT |
                                   EGL_OPENVG_BIT |
                                   EGL_OPENGL_BIT);
   _EGLDisplay *disp = _eglLookupDisplay(dpy);
   XVisualInfo *visInfo, visTemplate;
   int num_visuals, i;

   /* get list of all X visuals, create an EGL config for each */
   visTemplate.screen = DefaultScreen(disp->Xdpy);
   visInfo = XGetVisualInfo(disp->Xdpy, VisualScreenMask,
                            &visTemplate, &num_visuals);
   if (!visInfo) {
      printf("egl_xlib.c: couldn't get any X visuals\n");
      abort();
   }

   for (i = 0; i < num_visuals; i++) {
      _EGLConfig *config = calloc(1, sizeof(_EGLConfig));
      int id = i + 1;
      int rbits = bitcount(visInfo[i].red_mask);
      int gbits = bitcount(visInfo[i].green_mask);
      int bbits = bitcount(visInfo[i].blue_mask);
      int abits = bbits == 8 ? 8 : 0;
      int zbits = 24;
      int sbits = 8;
      int visid = visInfo[i].visualid;
#if defined(__cplusplus) || defined(c_plusplus)
      int vistype = visInfo[i].c_class;
#else
      int vistype = visInfo[i].class;
#endif

      _eglInitConfig(config, id);
      SET_CONFIG_ATTRIB(config, EGL_BUFFER_SIZE, rbits + gbits + bbits + abits);
      SET_CONFIG_ATTRIB(config, EGL_RED_SIZE, rbits);
      SET_CONFIG_ATTRIB(config, EGL_GREEN_SIZE, gbits);
      SET_CONFIG_ATTRIB(config, EGL_BLUE_SIZE, bbits);
      SET_CONFIG_ATTRIB(config, EGL_ALPHA_SIZE, abits);
      SET_CONFIG_ATTRIB(config, EGL_DEPTH_SIZE, zbits);
      SET_CONFIG_ATTRIB(config, EGL_STENCIL_SIZE, sbits);
      SET_CONFIG_ATTRIB(config, EGL_NATIVE_VISUAL_ID, visid);
      SET_CONFIG_ATTRIB(config, EGL_NATIVE_VISUAL_TYPE, vistype);
      SET_CONFIG_ATTRIB(config, EGL_NATIVE_RENDERABLE, EGL_FALSE);
      SET_CONFIG_ATTRIB(config, EGL_CONFORMANT, all_apis);
      SET_CONFIG_ATTRIB(config, EGL_RENDERABLE_TYPE, all_apis);
      SET_CONFIG_ATTRIB(config, EGL_SURFACE_TYPE, EGL_WINDOW_BIT);

      _eglAddConfig(disp, config);
   }
}


/**
 * Called via eglInitialize(), drv->API.Initialize().
 */
static EGLBoolean
xlib_eglInitialize(_EGLDriver *drv, EGLDisplay dpy,
                   EGLint *minor, EGLint *major)
{
   create_configs(drv, dpy);

   drv->Initialized = EGL_TRUE;

   /* we're supporting EGL 1.4 */
   *minor = 1;
   *major = 4;

   return EGL_TRUE;
}


/**
 * Called via eglTerminate(), drv->API.Terminate().
 */
static EGLBoolean
xlib_eglTerminate(_EGLDriver *drv, EGLDisplay dpy)
{
   return EGL_TRUE;
}


static _EGLProc
xlib_eglGetProcAddress(const char *procname)
{
   return (_EGLProc) st_get_proc_address(procname);
}


static void
get_drawable_visual_info(Display *dpy, Drawable d, XVisualInfo *visInfo)
{
   XWindowAttributes attr;
   XVisualInfo visTemp, *vis;
   int num_visuals;

   XGetWindowAttributes(dpy, d, &attr);

   visTemp.screen = DefaultScreen(dpy);
   visTemp.visualid = attr.visual->visualid;
   vis = XGetVisualInfo(dpy,
                        (VisualScreenMask | VisualIDMask),
                        &visTemp, &num_visuals);
   if (vis)
      *visInfo = *vis;

   XFree(vis);
}



/** Get size of given window */
static Status
get_drawable_size(Display *dpy, Drawable d, uint *width, uint *height)
{
   Window root;
   Status stat;
   int xpos, ypos;
   unsigned int w, h, bw, depth;
   stat = XGetGeometry(dpy, d, &root, &xpos, &ypos, &w, &h, &bw, &depth);
   *width = w;
   *height = h;
   return stat;
}


static void
check_and_update_buffer_size(struct xlib_egl_surface *surface)
{
   uint width, height;
   get_drawable_size(surface->Dpy, surface->Win, &width, &height);
   st_resize_framebuffer(surface->Framebuffer, width, height);
   surface->Base.Width = width;
   surface->Base.Height = height;
}



static void
display_surface(struct pipe_winsys *pws,
                struct pipe_surface *psurf,
                struct xlib_egl_surface *xsurf)
{
   XImage *ximage;
   void *data;

   ximage = XCreateImage(xsurf->Dpy,
                         xsurf->VisInfo.visual,
                         xsurf->VisInfo.depth,
                         ZPixmap, 0,   /* format, offset */
                         NULL,         /* data */
                         0, 0,         /* size */
                         32,           /* bitmap_pad */
                         0);           /* bytes_per_line */


   assert(ximage->format);
   assert(ximage->bitmap_unit);

   data = pws->buffer_map(pws, psurf->buffer, 0);

   /* update XImage's fields */
   ximage->data = data;
   ximage->width = psurf->width;
   ximage->height = psurf->height;
   ximage->bytes_per_line = psurf->stride;
   
   XPutImage(xsurf->Dpy, xsurf->Win, xsurf->Gc,
             ximage, 0, 0, 0, 0, psurf->width, psurf->height);

   XSync(xsurf->Dpy, 0);

   ximage->data = NULL;
   XDestroyImage(ximage);

   pws->buffer_unmap(pws, psurf->buffer);
}



/** Display gallium surface in X window */
static void
flush_frontbuffer(struct pipe_winsys *pws,
                  struct pipe_surface *psurf,
                  void *context_private)
{
   struct xlib_egl_surface *xsurf = (struct xlib_egl_surface *) context_private;
   display_surface(pws, psurf, xsurf);
}



/**
 * Called via eglCreateContext(), drv->API.CreateContext().
 */
static EGLContext
xlib_eglCreateContext(_EGLDriver *drv, EGLDisplay dpy, EGLConfig config,
                      EGLContext share_list, const EGLint *attrib_list)
{
   struct xlib_egl_driver *xdrv = xlib_egl_driver(drv);
   _EGLConfig *conf = _eglLookupConfig(drv, dpy, config);
   struct xlib_egl_context *ctx;
   struct st_context *share_ctx = NULL; /* XXX fix */
   __GLcontextModes visual;

   ctx = CALLOC_STRUCT(xlib_egl_context);
   if (!ctx)
      return EGL_NO_CONTEXT;

   /* let EGL lib init the common stuff */
   if (!_eglInitContext(drv, dpy, &ctx->Base, config, attrib_list)) {
      free(ctx);
      return EGL_NO_CONTEXT;
   }

   /* API-dependent context creation */
   switch (ctx->Base.ClientAPI) {
   case EGL_OPENVG_API:
   case EGL_OPENGL_ES_API:
      _eglLog(_EGL_DEBUG, "Create Context for ES version %d\n",
              ctx->Base.ClientVersion);
      /* fall-through */
   case EGL_OPENGL_API:
      /* create a softpipe context */
      ctx->pipe = softpipe_create(xdrv->screen, xdrv->winsys, NULL);
      /* Now do xlib / state tracker inits here */
      _eglConfigToContextModesRec(conf, &visual);
      ctx->Context = st_create_context(ctx->pipe, &visual, share_ctx);
      break;
   default:
      _eglError(EGL_BAD_MATCH, "eglCreateContext(unsupported API)");
      free(ctx);
      return EGL_NO_CONTEXT;
   }

   _eglSaveContext(&ctx->Base);

   return _eglGetContextHandle(&ctx->Base);
}


static EGLBoolean
xlib_eglDestroyContext(_EGLDriver *drv, EGLDisplay dpy, EGLContext ctx)
{
   struct xlib_egl_context *context = lookup_context(ctx);
   if (context) {
      if (context->Base.IsBound) {
         context->Base.DeletePending = EGL_TRUE;
      }
      else {
         /* API-dependent clean-up */
         switch (context->Base.ClientAPI) {
         case EGL_OPENGL_ES_API:
            /* fall-through */
         case EGL_OPENGL_API:
            st_destroy_context(context->Context);
            break;
         default:
            assert(0);
         }
         free(context);
      }
      return EGL_TRUE;
   }
   else {
      _eglError(EGL_BAD_CONTEXT, "eglDestroyContext");
      return EGL_TRUE;
   }
}


/**
 * Called via eglMakeCurrent(), drv->API.MakeCurrent().
 */
static EGLBoolean
xlib_eglMakeCurrent(_EGLDriver *drv, EGLDisplay dpy,
                    EGLSurface draw, EGLSurface read, EGLContext ctx)
{
   struct xlib_egl_context *context = lookup_context(ctx);
   struct xlib_egl_surface *draw_surf = lookup_surface(draw);
   struct xlib_egl_surface *read_surf = lookup_surface(read);

   if (!_eglMakeCurrent(drv, dpy, draw, read, context))
      return EGL_FALSE;

   st_make_current((context ? context->Context : NULL),
                   (draw_surf ? draw_surf->Framebuffer : NULL),
                   (read_surf ? read_surf->Framebuffer : NULL));

   if (draw_surf)
      check_and_update_buffer_size(draw_surf);
   if (read_surf && read_surf != draw_surf)
      check_and_update_buffer_size(draw_surf);

   return EGL_TRUE;
}


static enum pipe_format
choose_color_format(const __GLcontextModes *visual)
{
   if (visual->redBits == 8 &&
       visual->greenBits == 8 &&
       visual->blueBits == 8 &&
       visual->alphaBits == 8) {
      /* XXX this really also depends on the ordering of R,G,B,A */
      return PIPE_FORMAT_A8R8G8B8_UNORM;
   }
   else {
      assert(0);
      return PIPE_FORMAT_NONE;
   }
}


static enum pipe_format
choose_depth_format(const __GLcontextModes *visual)
{
   if (visual->depthBits > 0)
      return PIPE_FORMAT_S8Z24_UNORM;
   else
      return PIPE_FORMAT_NONE;
}


static enum pipe_format
choose_stencil_format(const __GLcontextModes *visual)
{
   if (visual->stencilBits > 0)
      return PIPE_FORMAT_S8Z24_UNORM;
   else
      return PIPE_FORMAT_NONE;
}


/**
 * Called via eglCreateWindowSurface(), drv->API.CreateWindowSurface().
 */
static EGLSurface
xlib_eglCreateWindowSurface(_EGLDriver *drv, EGLDisplay dpy, EGLConfig config,
                            NativeWindowType window, const EGLint *attrib_list)
{
   struct xlib_egl_driver *xdrv = xlib_egl_driver(drv);
   _EGLDisplay *disp = _eglLookupDisplay(dpy);
   _EGLConfig *conf = _eglLookupConfig(drv, dpy, config);

   struct xlib_egl_surface *surf;
   __GLcontextModes visual;
   uint width, height;

   surf = CALLOC_STRUCT(xlib_egl_surface);
   if (!surf)
      return EGL_NO_SURFACE;

   /* Let EGL lib init the common stuff */
   if (!_eglInitSurface(drv, dpy, &surf->Base, EGL_WINDOW_BIT,
                        config, attrib_list)) {
      free(surf);
      return EGL_NO_SURFACE;
   }

   _eglSaveSurface(&surf->Base);

   /*
    * Now init the Xlib and gallium stuff
    */
   surf->Win = (Window) window;  /* The X window ID */
   surf->Dpy = disp->Xdpy;  /* The X display */
   surf->Gc = XCreateGC(surf->Dpy, surf->Win, 0, NULL);

   surf->winsys = xdrv->winsys;

   _eglConfigToContextModesRec(conf, &visual);
   get_drawable_size(surf->Dpy, surf->Win, &width, &height);
   get_drawable_visual_info(surf->Dpy, surf->Win, &surf->VisInfo);

   surf->Base.Width = width;
   surf->Base.Height = height;

   /* Create GL statetracker framebuffer */
   surf->Framebuffer = st_create_framebuffer(&visual,
                                             choose_color_format(&visual),
                                             choose_depth_format(&visual),
                                             choose_stencil_format(&visual),
                                             width, height,
                                             (void *) surf);

   st_resize_framebuffer(surf->Framebuffer, width, height);

   return _eglGetSurfaceHandle(&surf->Base);
}


static EGLBoolean
xlib_eglDestroySurface(_EGLDriver *drv, EGLDisplay dpy, EGLSurface surface)
{
   struct xlib_egl_surface *surf = lookup_surface(surface);
   if (surf) {
      _eglHashRemove(_eglGlobal.Surfaces, (EGLuint) surface);
      if (surf->Base.IsBound) {
         surf->Base.DeletePending = EGL_TRUE;
      }
      else {
         XFreeGC(surf->Dpy, surf->Gc);
         st_unreference_framebuffer(&surf->Framebuffer);
         free(surf);
      }
      return EGL_TRUE;
   }
   else {
      _eglError(EGL_BAD_SURFACE, "eglDestroySurface");
      return EGL_FALSE;
   }
}


static EGLBoolean
xlib_eglSwapBuffers(_EGLDriver *drv, EGLDisplay dpy, EGLSurface draw)
{
   /* error checking step: */
   if (!_eglSwapBuffers(drv, dpy, draw))
      return EGL_FALSE;

   {
      struct xlib_egl_surface *xsurf = lookup_surface(draw);
      struct pipe_winsys *pws = xsurf->winsys;
      struct pipe_surface *psurf =
         st_get_framebuffer_surface(xsurf->Framebuffer, ST_SURFACE_BACK_LEFT);

      st_notify_swapbuffers(xsurf->Framebuffer);

      display_surface(pws, psurf, xsurf);

      check_and_update_buffer_size(xsurf);
   }

   return EGL_TRUE;
}


/**
 * Determine which API(s) is(are) present by looking for some specific
 * global symbols.
 */
static EGLint
find_supported_apis(void)
{
   EGLint mask = 0;
   void *handle;

   handle = dlopen(NULL, 0);

   if (dlsym(handle, "st_api_OpenGL_ES1"))
      mask |= EGL_OPENGL_ES_BIT;

   if (dlsym(handle, "st_api_OpenGL_ES2"))
      mask |= EGL_OPENGL_ES2_BIT;

   if (dlsym(handle, "st_api_OpenGL"))
      mask |= EGL_OPENGL_BIT;

   if (dlsym(handle, "st_api_OpenVG"))
      mask |= EGL_OPENVG_BIT;

   dlclose(handle);

   return mask;
}


/**
 * This is the main entrypoint into the driver.
 * Called by libEGL to instantiate an _EGLDriver object.
 */
_EGLDriver *
_eglMain(_EGLDisplay *dpy, const char *args)
{
   struct xlib_egl_driver *xdrv;

   _eglLog(_EGL_INFO, "Entering EGL/Xlib _eglMain(%s)", args);

   xdrv = CALLOC_STRUCT(xlib_egl_driver);
   if (!xdrv)
      return NULL;

   if (!dpy->Xdpy) {
      dpy->Xdpy = XOpenDisplay(NULL);
   }

   _eglInitDriverFallbacks(&xdrv->Base);
   xdrv->Base.API.Initialize = xlib_eglInitialize;
   xdrv->Base.API.Terminate = xlib_eglTerminate;
   xdrv->Base.API.GetProcAddress = xlib_eglGetProcAddress;
   xdrv->Base.API.CreateContext = xlib_eglCreateContext;
   xdrv->Base.API.DestroyContext = xlib_eglDestroyContext;
   xdrv->Base.API.CreateWindowSurface = xlib_eglCreateWindowSurface;
   xdrv->Base.API.DestroySurface = xlib_eglDestroySurface;
   xdrv->Base.API.MakeCurrent = xlib_eglMakeCurrent;
   xdrv->Base.API.SwapBuffers = xlib_eglSwapBuffers;

   xdrv->Base.ClientAPIsMask = find_supported_apis();
   if (xdrv->Base.ClientAPIsMask == 0x0) {
      /* the app isn't directly linked with any EGL-supprted APIs
       * (such as libGLESv2.so) so use an EGL utility to see what
       * APIs might be loaded dynamically on this system.
       */
      xdrv->Base.ClientAPIsMask = _eglFindAPIs();
   }      

   xdrv->Base.Name = "Xlib/softpipe";

   /* create one winsys and use it for all contexts/surfaces */
   xdrv->winsys = create_sw_winsys();
   xdrv->winsys->flush_frontbuffer = flush_frontbuffer;

   xdrv->screen = softpipe_create_screen(xdrv->winsys);

   return &xdrv->Base;
}