glxext.c revision 8d00f077c9672ed2f00a1c67b688c82c3fc7d480 
1/*
2 * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
3 * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the "Software"),
7 * to deal in the Software without restriction, including without limitation
8 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
9 * and/or sell copies of the Software, and to permit persons to whom the
10 * Software is furnished to do so, subject to the following conditions:
11 *
12 * The above copyright notice including the dates of first publication and
13 * either this permission notice or a reference to
14 * http://oss.sgi.com/projects/FreeB/
15 * shall be included in all copies or substantial portions of the Software.
16 *
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
18 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
20 * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
21 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
22 * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
23 * SOFTWARE.
24 *
25 * Except as contained in this notice, the name of Silicon Graphics, Inc.
26 * shall not be used in advertising or otherwise to promote the sale, use or
27 * other dealings in this Software without prior written authorization from
28 * Silicon Graphics, Inc.
29 */
30
31/**
32 * \file glxext.c
33 * GLX protocol interface boot-strap code.
34 *
35 * Direct rendering support added by Precision Insight, Inc.
36 *
37 * \author Kevin E. Martin <kevin@precisioninsight.com>
38 */
39
40#include <assert.h>
41#include "glxclient.h"
42#include <X11/extensions/Xext.h>
43#include <X11/extensions/extutil.h>
44#ifdef GLX_USE_APPLEGL
45#include "apple_glx.h"
46#include "apple_visual.h"
47#endif
48#include "glxextensions.h"
49
50#ifdef USE_XCB
51#include <X11/Xlib-xcb.h>
52#include <xcb/xcb.h>
53#include <xcb/glx.h>
54#endif
55
56
57#ifdef DEBUG
58void __glXDumpDrawBuffer(struct glx_context * ctx);
59#endif
60
61/*
62** You can set this cell to 1 to force the gl drawing stuff to be
63** one command per packet
64*/
65_X_HIDDEN int __glXDebug = 0;
66
67/* Extension required boiler plate */
68
69static const char __glXExtensionName[] = GLX_EXTENSION_NAME;
70  static struct glx_display *glx_displays;
71
72static /* const */ char *error_list[] = {
73   "GLXBadContext",
74   "GLXBadContextState",
75   "GLXBadDrawable",
76   "GLXBadPixmap",
77   "GLXBadContextTag",
78   "GLXBadCurrentWindow",
79   "GLXBadRenderRequest",
80   "GLXBadLargeRequest",
81   "GLXUnsupportedPrivateRequest",
82   "GLXBadFBConfig",
83   "GLXBadPbuffer",
84   "GLXBadCurrentDrawable",
85   "GLXBadWindow",
86   "GLXBadProfileARB",
87};
88
89#ifdef GLX_USE_APPLEGL
90static char *__glXErrorString(Display *dpy, int code, XExtCodes *codes,
91                              char *buf, int n);
92#endif
93
94static
95XEXT_GENERATE_ERROR_STRING(__glXErrorString, __glXExtensionName,
96                           __GLX_NUMBER_ERRORS, error_list)
97
98/*
99 * GLX events are a bit funky.  We don't stuff the X event code into
100 * our user exposed (via XNextEvent) structure.  Instead we use the GLX
101 * private event code namespace (and hope it doesn't conflict).  Clients
102 * have to know that bit 15 in the event type field means they're getting
103 * a GLX event, and then handle the various sub-event types there, rather
104 * than simply checking the event code and handling it directly.
105 */
106
107static Bool
108__glXWireToEvent(Display *dpy, XEvent *event, xEvent *wire)
109{
110     struct glx_display *glx_dpy = __glXInitialize(dpy);
111
112   if (glx_dpy == NULL)
113      return False;
114
115   switch ((wire->u.u.type & 0x7f) - glx_dpy->codes->first_event) {
116   case GLX_PbufferClobber:
117   {
118      GLXPbufferClobberEvent *aevent = (GLXPbufferClobberEvent *)event;
119      xGLXPbufferClobberEvent *awire = (xGLXPbufferClobberEvent *)wire;
120      aevent->event_type = awire->type;
121      aevent->serial = awire->sequenceNumber;
122      aevent->event_type = awire->event_type;
123      aevent->draw_type = awire->draw_type;
124      aevent->drawable = awire->drawable;
125      aevent->buffer_mask = awire->buffer_mask;
126      aevent->aux_buffer = awire->aux_buffer;
127      aevent->x = awire->x;
128      aevent->y = awire->y;
129      aevent->width = awire->width;
130      aevent->height = awire->height;
131      aevent->count = awire->count;
132      return True;
133   }
134   case GLX_BufferSwapComplete:
135   {
136      GLXBufferSwapComplete *aevent = (GLXBufferSwapComplete *)event;
137      xGLXBufferSwapComplete2 *awire = (xGLXBufferSwapComplete2 *)wire;
138      struct glx_drawable *glxDraw = GetGLXDrawable(dpy, awire->drawable);
139      aevent->event_type = awire->event_type;
140      aevent->drawable = awire->drawable;
141      aevent->ust = ((CARD64)awire->ust_hi << 32) | awire->ust_lo;
142      aevent->msc = ((CARD64)awire->msc_hi << 32) | awire->msc_lo;
143
144      if (!glxDraw)
145	 return False;
146
147      if (awire->sbc < glxDraw->lastEventSbc)
148	 glxDraw->eventSbcWrap += 0x100000000;
149      glxDraw->lastEventSbc = awire->sbc;
150      aevent->sbc = awire->sbc + glxDraw->eventSbcWrap;
151      return True;
152   }
153   default:
154      /* client doesn't support server event */
155      break;
156   }
157
158   return False;
159}
160
161/* We don't actually support this.  It doesn't make sense for clients to
162 * send each other GLX events.
163 */
164static Status
165__glXEventToWire(Display *dpy, XEvent *event, xEvent *wire)
166{
167     struct glx_display *glx_dpy = __glXInitialize(dpy);
168
169   if (glx_dpy == NULL)
170      return False;
171
172   switch (event->type) {
173   case GLX_DAMAGED:
174      break;
175   case GLX_SAVED:
176      break;
177   case GLX_EXCHANGE_COMPLETE_INTEL:
178      break;
179   case GLX_COPY_COMPLETE_INTEL:
180      break;
181   case GLX_FLIP_COMPLETE_INTEL:
182      break;
183   default:
184      /* client doesn't support server event */
185      break;
186   }
187
188   return Success;
189}
190
191/************************************************************************/
192/*
193** Free the per screen configs data as well as the array of
194** __glXScreenConfigs.
195*/
196static void
197FreeScreenConfigs(struct glx_display * priv)
198{
199   struct glx_screen *psc;
200   GLint i, screens;
201
202   /* Free screen configuration information */
203   screens = ScreenCount(priv->dpy);
204   for (i = 0; i < screens; i++) {
205      psc = priv->screens[i];
206      glx_screen_cleanup(psc);
207
208#if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
209      if (psc->driScreen) {
210         psc->driScreen->destroyScreen(psc);
211      } else {
212	 Xfree(psc);
213      }
214#else
215      Xfree(psc);
216#endif
217   }
218   XFree((char *) priv->screens);
219   priv->screens = NULL;
220}
221
222static void
223glx_display_free(struct glx_display *priv)
224{
225   struct glx_context *gc;
226
227   gc = __glXGetCurrentContext();
228   if (priv->dpy == gc->currentDpy) {
229      gc->vtable->destroy(gc);
230      __glXSetCurrentContextNull();
231   }
232
233   FreeScreenConfigs(priv);
234   if (priv->serverGLXvendor)
235      Xfree((char *) priv->serverGLXvendor);
236   if (priv->serverGLXversion)
237      Xfree((char *) priv->serverGLXversion);
238
239   __glxHashDestroy(priv->glXDrawHash);
240
241#if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
242   __glxHashDestroy(priv->drawHash);
243
244   /* Free the direct rendering per display data */
245   if (priv->driswDisplay)
246      (*priv->driswDisplay->destroyDisplay) (priv->driswDisplay);
247   priv->driswDisplay = NULL;
248
249   if (priv->driDisplay)
250      (*priv->driDisplay->destroyDisplay) (priv->driDisplay);
251   priv->driDisplay = NULL;
252
253   if (priv->dri2Display)
254      (*priv->dri2Display->destroyDisplay) (priv->dri2Display);
255   priv->dri2Display = NULL;
256#endif
257
258   Xfree((char *) priv);
259}
260
261static int
262__glXCloseDisplay(Display * dpy, XExtCodes * codes)
263{
264   struct glx_display *priv, **prev;
265
266   _XLockMutex(_Xglobal_lock);
267   prev = &glx_displays;
268   for (priv = glx_displays; priv; prev = &priv->next, priv = priv->next) {
269      if (priv->dpy == dpy) {
270         *prev = priv->next;
271	 break;
272      }
273   }
274   _XUnlockMutex(_Xglobal_lock);
275
276   glx_display_free(priv);
277
278   return 1;
279}
280
281/*
282** Query the version of the GLX extension.  This procedure works even if
283** the client extension is not completely set up.
284*/
285static Bool
286QueryVersion(Display * dpy, int opcode, int *major, int *minor)
287{
288#ifdef USE_XCB
289   xcb_connection_t *c = XGetXCBConnection(dpy);
290   xcb_glx_query_version_reply_t *reply = xcb_glx_query_version_reply(c,
291                                                                      xcb_glx_query_version
292                                                                      (c,
293                                                                       GLX_MAJOR_VERSION,
294                                                                       GLX_MINOR_VERSION),
295                                                                      NULL);
296
297   if (!reply)
298     return GL_FALSE;
299
300   if (reply->major_version != GLX_MAJOR_VERSION) {
301      free(reply);
302      return GL_FALSE;
303   }
304   *major = reply->major_version;
305   *minor = min(reply->minor_version, GLX_MINOR_VERSION);
306   free(reply);
307   return GL_TRUE;
308#else
309   xGLXQueryVersionReq *req;
310   xGLXQueryVersionReply reply;
311
312   /* Send the glXQueryVersion request */
313   LockDisplay(dpy);
314   GetReq(GLXQueryVersion, req);
315   req->reqType = opcode;
316   req->glxCode = X_GLXQueryVersion;
317   req->majorVersion = GLX_MAJOR_VERSION;
318   req->minorVersion = GLX_MINOR_VERSION;
319   _XReply(dpy, (xReply *) & reply, 0, False);
320   UnlockDisplay(dpy);
321   SyncHandle();
322
323   if (reply.majorVersion != GLX_MAJOR_VERSION) {
324      /*
325       ** The server does not support the same major release as this
326       ** client.
327       */
328      return GL_FALSE;
329   }
330   *major = reply.majorVersion;
331   *minor = min(reply.minorVersion, GLX_MINOR_VERSION);
332   return GL_TRUE;
333#endif /* USE_XCB */
334}
335
336/*
337 * We don't want to enable this GLX_OML_swap_method in glxext.h,
338 * because we can't support it.  The X server writes it out though,
339 * so we should handle it somehow, to avoid false warnings.
340 */
341enum {
342    IGNORE_GLX_SWAP_METHOD_OML = 0x8060
343};
344
345
346static GLint
347convert_from_x_visual_type(int visualType)
348{
349   static const int glx_visual_types[] = {
350      GLX_STATIC_GRAY, GLX_GRAY_SCALE,
351      GLX_STATIC_COLOR, GLX_PSEUDO_COLOR,
352      GLX_TRUE_COLOR, GLX_DIRECT_COLOR
353   };
354
355   if (visualType < ARRAY_SIZE(glx_visual_types))
356      return glx_visual_types[visualType];
357
358   return GLX_NONE;
359}
360
361/*
362 * getVisualConfigs uses the !tagged_only path.
363 * getFBConfigs uses the tagged_only path.
364 */
365_X_HIDDEN void
366__glXInitializeVisualConfigFromTags(struct glx_config * config, int count,
367                                    const INT32 * bp, Bool tagged_only,
368                                    Bool fbconfig_style_tags)
369{
370   int i;
371
372   if (!tagged_only) {
373      /* Copy in the first set of properties */
374      config->visualID = *bp++;
375
376      config->visualType = convert_from_x_visual_type(*bp++);
377
378      config->rgbMode = *bp++;
379
380      config->redBits = *bp++;
381      config->greenBits = *bp++;
382      config->blueBits = *bp++;
383      config->alphaBits = *bp++;
384      config->accumRedBits = *bp++;
385      config->accumGreenBits = *bp++;
386      config->accumBlueBits = *bp++;
387      config->accumAlphaBits = *bp++;
388
389      config->doubleBufferMode = *bp++;
390      config->stereoMode = *bp++;
391
392      config->rgbBits = *bp++;
393      config->depthBits = *bp++;
394      config->stencilBits = *bp++;
395      config->numAuxBuffers = *bp++;
396      config->level = *bp++;
397
398#ifdef GLX_USE_APPLEGL
399       /* AppleSGLX supports pixmap and pbuffers with all config. */
400       config->drawableType = GLX_WINDOW_BIT | GLX_PIXMAP_BIT | GLX_PBUFFER_BIT;
401       /* Unfortunately this can create an ABI compatibility problem. */
402       count -= 18;
403#else
404      count -= __GLX_MIN_CONFIG_PROPS;
405#endif
406   }
407
408   /*
409    ** Additional properties may be in a list at the end
410    ** of the reply.  They are in pairs of property type
411    ** and property value.
412    */
413
414#define FETCH_OR_SET(tag) \
415    config-> tag = ( fbconfig_style_tags ) ? *bp++ : 1
416
417   for (i = 0; i < count; i += 2) {
418      long int tag = *bp++;
419
420      switch (tag) {
421      case GLX_RGBA:
422         FETCH_OR_SET(rgbMode);
423         break;
424      case GLX_BUFFER_SIZE:
425         config->rgbBits = *bp++;
426         break;
427      case GLX_LEVEL:
428         config->level = *bp++;
429         break;
430      case GLX_DOUBLEBUFFER:
431         FETCH_OR_SET(doubleBufferMode);
432         break;
433      case GLX_STEREO:
434         FETCH_OR_SET(stereoMode);
435         break;
436      case GLX_AUX_BUFFERS:
437         config->numAuxBuffers = *bp++;
438         break;
439      case GLX_RED_SIZE:
440         config->redBits = *bp++;
441         break;
442      case GLX_GREEN_SIZE:
443         config->greenBits = *bp++;
444         break;
445      case GLX_BLUE_SIZE:
446         config->blueBits = *bp++;
447         break;
448      case GLX_ALPHA_SIZE:
449         config->alphaBits = *bp++;
450         break;
451      case GLX_DEPTH_SIZE:
452         config->depthBits = *bp++;
453         break;
454      case GLX_STENCIL_SIZE:
455         config->stencilBits = *bp++;
456         break;
457      case GLX_ACCUM_RED_SIZE:
458         config->accumRedBits = *bp++;
459         break;
460      case GLX_ACCUM_GREEN_SIZE:
461         config->accumGreenBits = *bp++;
462         break;
463      case GLX_ACCUM_BLUE_SIZE:
464         config->accumBlueBits = *bp++;
465         break;
466      case GLX_ACCUM_ALPHA_SIZE:
467         config->accumAlphaBits = *bp++;
468         break;
469      case GLX_VISUAL_CAVEAT_EXT:
470         config->visualRating = *bp++;
471         break;
472      case GLX_X_VISUAL_TYPE:
473         config->visualType = *bp++;
474         break;
475      case GLX_TRANSPARENT_TYPE:
476         config->transparentPixel = *bp++;
477         break;
478      case GLX_TRANSPARENT_INDEX_VALUE:
479         config->transparentIndex = *bp++;
480         break;
481      case GLX_TRANSPARENT_RED_VALUE:
482         config->transparentRed = *bp++;
483         break;
484      case GLX_TRANSPARENT_GREEN_VALUE:
485         config->transparentGreen = *bp++;
486         break;
487      case GLX_TRANSPARENT_BLUE_VALUE:
488         config->transparentBlue = *bp++;
489         break;
490      case GLX_TRANSPARENT_ALPHA_VALUE:
491         config->transparentAlpha = *bp++;
492         break;
493      case GLX_VISUAL_ID:
494         config->visualID = *bp++;
495         break;
496      case GLX_DRAWABLE_TYPE:
497         config->drawableType = *bp++;
498#ifdef GLX_USE_APPLEGL
499         /* AppleSGLX supports pixmap and pbuffers with all config. */
500         config->drawableType |= GLX_WINDOW_BIT | GLX_PIXMAP_BIT | GLX_PBUFFER_BIT;
501#endif
502         break;
503      case GLX_RENDER_TYPE:
504         config->renderType = *bp++;
505         break;
506      case GLX_X_RENDERABLE:
507         config->xRenderable = *bp++;
508         break;
509      case GLX_FBCONFIG_ID:
510         config->fbconfigID = *bp++;
511         break;
512      case GLX_MAX_PBUFFER_WIDTH:
513         config->maxPbufferWidth = *bp++;
514         break;
515      case GLX_MAX_PBUFFER_HEIGHT:
516         config->maxPbufferHeight = *bp++;
517         break;
518      case GLX_MAX_PBUFFER_PIXELS:
519         config->maxPbufferPixels = *bp++;
520         break;
521#ifndef GLX_USE_APPLEGL
522      case GLX_OPTIMAL_PBUFFER_WIDTH_SGIX:
523         config->optimalPbufferWidth = *bp++;
524         break;
525      case GLX_OPTIMAL_PBUFFER_HEIGHT_SGIX:
526         config->optimalPbufferHeight = *bp++;
527         break;
528      case GLX_VISUAL_SELECT_GROUP_SGIX:
529         config->visualSelectGroup = *bp++;
530         break;
531      case GLX_SWAP_METHOD_OML:
532         config->swapMethod = *bp++;
533         break;
534#endif
535      case GLX_SAMPLE_BUFFERS_SGIS:
536         config->sampleBuffers = *bp++;
537         break;
538      case GLX_SAMPLES_SGIS:
539         config->samples = *bp++;
540         break;
541#ifdef GLX_USE_APPLEGL
542      case IGNORE_GLX_SWAP_METHOD_OML:
543         /* We ignore this tag.  See the comment above this function. */
544         ++bp;
545         break;
546#else
547      case GLX_BIND_TO_TEXTURE_RGB_EXT:
548         config->bindToTextureRgb = *bp++;
549         break;
550      case GLX_BIND_TO_TEXTURE_RGBA_EXT:
551         config->bindToTextureRgba = *bp++;
552         break;
553      case GLX_BIND_TO_MIPMAP_TEXTURE_EXT:
554         config->bindToMipmapTexture = *bp++;
555         break;
556      case GLX_BIND_TO_TEXTURE_TARGETS_EXT:
557         config->bindToTextureTargets = *bp++;
558         break;
559      case GLX_Y_INVERTED_EXT:
560         config->yInverted = *bp++;
561         break;
562#endif
563      case GLX_FRAMEBUFFER_SRGB_CAPABLE_EXT:
564         config->sRGBCapable = *bp++;
565         break;
566
567      case GLX_USE_GL:
568         if (fbconfig_style_tags)
569            bp++;
570         break;
571      case None:
572         i = count;
573         break;
574      default:
575         if(getenv("LIBGL_DIAGNOSTIC")) {
576             long int tagvalue = *bp++;
577             fprintf(stderr, "WARNING: unknown GLX tag from server: "
578                     "tag 0x%lx value 0x%lx\n", tag, tagvalue);
579         } else {
580             /* Ignore the unrecognized tag's value */
581             bp++;
582         }
583         break;
584      }
585   }
586
587   config->renderType =
588      (config->rgbMode) ? GLX_RGBA_BIT : GLX_COLOR_INDEX_BIT;
589}
590
591static struct glx_config *
592createConfigsFromProperties(Display * dpy, int nvisuals, int nprops,
593                            int screen, GLboolean tagged_only)
594{
595   INT32 buf[__GLX_TOTAL_CONFIG], *props;
596   unsigned prop_size;
597   struct glx_config *modes, *m;
598   int i;
599
600   if (nprops == 0)
601      return NULL;
602
603   /* FIXME: Is the __GLX_MIN_CONFIG_PROPS test correct for FBconfigs? */
604
605   /* Check number of properties */
606   if (nprops < __GLX_MIN_CONFIG_PROPS || nprops > __GLX_MAX_CONFIG_PROPS)
607      return NULL;
608
609   /* Allocate memory for our config structure */
610   modes = glx_config_create_list(nvisuals);
611   if (!modes)
612      return NULL;
613
614   prop_size = nprops * __GLX_SIZE_INT32;
615   if (prop_size <= sizeof(buf))
616      props = buf;
617   else
618      props = Xmalloc(prop_size);
619
620   /* Read each config structure and convert it into our format */
621   m = modes;
622   for (i = 0; i < nvisuals; i++) {
623      _XRead(dpy, (char *) props, prop_size);
624#ifdef GLX_USE_APPLEGL
625       /* Older X servers don't send this so we default it here. */
626      m->drawableType = GLX_WINDOW_BIT;
627#else
628      /*
629       * The XQuartz 2.3.2.1 X server doesn't set this properly, so
630       * set the proper bits here.
631       * AppleSGLX supports windows, pixmaps, and pbuffers with all config.
632       */
633      m->drawableType = GLX_WINDOW_BIT | GLX_PIXMAP_BIT | GLX_PBUFFER_BIT;
634#endif
635       __glXInitializeVisualConfigFromTags(m, nprops, props,
636                                          tagged_only, GL_TRUE);
637      m->screen = screen;
638      m = m->next;
639   }
640
641   if (props != buf)
642      Xfree(props);
643
644   return modes;
645}
646
647static GLboolean
648getVisualConfigs(struct glx_screen *psc,
649		  struct glx_display *priv, int screen)
650{
651   xGLXGetVisualConfigsReq *req;
652   xGLXGetVisualConfigsReply reply;
653   Display *dpy = priv->dpy;
654
655   LockDisplay(dpy);
656
657   psc->visuals = NULL;
658   GetReq(GLXGetVisualConfigs, req);
659   req->reqType = priv->majorOpcode;
660   req->glxCode = X_GLXGetVisualConfigs;
661   req->screen = screen;
662
663   if (!_XReply(dpy, (xReply *) & reply, 0, False))
664      goto out;
665
666   psc->visuals = createConfigsFromProperties(dpy,
667                                              reply.numVisuals,
668                                              reply.numProps,
669                                              screen, GL_FALSE);
670
671 out:
672   UnlockDisplay(dpy);
673   return psc->visuals != NULL;
674}
675
676static GLboolean
677 getFBConfigs(struct glx_screen *psc, struct glx_display *priv, int screen)
678{
679   xGLXGetFBConfigsReq *fb_req;
680   xGLXGetFBConfigsSGIXReq *sgi_req;
681   xGLXVendorPrivateWithReplyReq *vpreq;
682   xGLXGetFBConfigsReply reply;
683   Display *dpy = priv->dpy;
684
685   psc->serverGLXexts =
686      __glXQueryServerString(dpy, priv->majorOpcode, screen, GLX_EXTENSIONS);
687
688   LockDisplay(dpy);
689
690   psc->configs = NULL;
691   if (atof(priv->serverGLXversion) >= 1.3) {
692      GetReq(GLXGetFBConfigs, fb_req);
693      fb_req->reqType = priv->majorOpcode;
694      fb_req->glxCode = X_GLXGetFBConfigs;
695      fb_req->screen = screen;
696   }
697   else if (strstr(psc->serverGLXexts, "GLX_SGIX_fbconfig") != NULL) {
698      GetReqExtra(GLXVendorPrivateWithReply,
699                  sz_xGLXGetFBConfigsSGIXReq -
700                  sz_xGLXVendorPrivateWithReplyReq, vpreq);
701      sgi_req = (xGLXGetFBConfigsSGIXReq *) vpreq;
702      sgi_req->reqType = priv->majorOpcode;
703      sgi_req->glxCode = X_GLXVendorPrivateWithReply;
704      sgi_req->vendorCode = X_GLXvop_GetFBConfigsSGIX;
705      sgi_req->screen = screen;
706   }
707   else
708      goto out;
709
710   if (!_XReply(dpy, (xReply *) & reply, 0, False))
711      goto out;
712
713   psc->configs = createConfigsFromProperties(dpy,
714                                              reply.numFBConfigs,
715                                              reply.numAttribs * 2,
716                                              screen, GL_TRUE);
717
718 out:
719   UnlockDisplay(dpy);
720   return psc->configs != NULL;
721}
722
723_X_HIDDEN Bool
724glx_screen_init(struct glx_screen *psc,
725		 int screen, struct glx_display * priv)
726{
727   /* Initialize per screen dynamic client GLX extensions */
728   psc->ext_list_first_time = GL_TRUE;
729   psc->scr = screen;
730   psc->dpy = priv->dpy;
731   psc->display = priv;
732
733   getVisualConfigs(psc, priv, screen);
734   getFBConfigs(psc, priv, screen);
735
736   return GL_TRUE;
737}
738
739_X_HIDDEN void
740glx_screen_cleanup(struct glx_screen *psc)
741{
742   if (psc->configs) {
743      glx_config_destroy_list(psc->configs);
744      if (psc->effectiveGLXexts)
745          Xfree(psc->effectiveGLXexts);
746      psc->configs = NULL;   /* NOTE: just for paranoia */
747   }
748   if (psc->visuals) {
749      glx_config_destroy_list(psc->visuals);
750      psc->visuals = NULL;   /* NOTE: just for paranoia */
751   }
752   Xfree((char *) psc->serverGLXexts);
753}
754
755/*
756** Allocate the memory for the per screen configs for each screen.
757** If that works then fetch the per screen configs data.
758*/
759static Bool
760AllocAndFetchScreenConfigs(Display * dpy, struct glx_display * priv)
761{
762   struct glx_screen *psc;
763   GLint i, screens;
764
765   /*
766    ** First allocate memory for the array of per screen configs.
767    */
768   screens = ScreenCount(dpy);
769   priv->screens = Xmalloc(screens * sizeof *priv->screens);
770   if (!priv->screens)
771      return GL_FALSE;
772
773   priv->serverGLXversion =
774      __glXQueryServerString(dpy, priv->majorOpcode, 0, GLX_VERSION);
775   if (priv->serverGLXversion == NULL) {
776      FreeScreenConfigs(priv);
777      return GL_FALSE;
778   }
779
780   for (i = 0; i < screens; i++, psc++) {
781      psc = NULL;
782#if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
783      if (priv->dri2Display)
784	 psc = (*priv->dri2Display->createScreen) (i, priv);
785      if (psc == NULL && priv->driDisplay)
786	 psc = (*priv->driDisplay->createScreen) (i, priv);
787      if (psc == NULL && priv->driswDisplay)
788	 psc = (*priv->driswDisplay->createScreen) (i, priv);
789#endif
790#if defined(GLX_USE_APPLEGL)
791      if (psc == NULL)
792         psc = applegl_create_screen(i, priv);
793#else
794      if (psc == NULL)
795	 psc = indirect_create_screen(i, priv);
796#endif
797      priv->screens[i] = psc;
798   }
799   SyncHandle();
800   return GL_TRUE;
801}
802
803/*
804** Initialize the client side extension code.
805*/
806 _X_HIDDEN struct glx_display *
807__glXInitialize(Display * dpy)
808{
809   struct glx_display *dpyPriv, *d;
810#if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
811   Bool glx_direct, glx_accel;
812#endif
813   int i;
814
815   _XLockMutex(_Xglobal_lock);
816
817   for (dpyPriv = glx_displays; dpyPriv; dpyPriv = dpyPriv->next) {
818      if (dpyPriv->dpy == dpy) {
819	 _XUnlockMutex(_Xglobal_lock);
820	 return dpyPriv;
821      }
822   }
823
824   /* Drop the lock while we create the display private. */
825   _XUnlockMutex(_Xglobal_lock);
826
827   dpyPriv = Xcalloc(1, sizeof *dpyPriv);
828   if (!dpyPriv)
829      return NULL;
830
831   dpyPriv->codes = XInitExtension(dpy, __glXExtensionName);
832   if (!dpyPriv->codes) {
833      Xfree(dpyPriv);
834      _XUnlockMutex(_Xglobal_lock);
835      return NULL;
836   }
837
838   dpyPriv->dpy = dpy;
839   dpyPriv->majorOpcode = dpyPriv->codes->major_opcode;
840   dpyPriv->serverGLXvendor = 0x0;
841   dpyPriv->serverGLXversion = 0x0;
842
843   /* See if the versions are compatible.  This GLX implementation does not
844    * work with servers that only support GLX 1.0.
845    */
846   if (!QueryVersion(dpy, dpyPriv->majorOpcode,
847		     &dpyPriv->majorVersion, &dpyPriv->minorVersion)
848       || (dpyPriv->majorVersion == 1 && dpyPriv->minorVersion < 1)) {
849      Xfree(dpyPriv);
850      _XUnlockMutex(_Xglobal_lock);
851      return NULL;
852   }
853
854   for (i = 0; i < __GLX_NUMBER_EVENTS; i++) {
855      XESetWireToEvent(dpy, dpyPriv->codes->first_event + i, __glXWireToEvent);
856      XESetEventToWire(dpy, dpyPriv->codes->first_event + i, __glXEventToWire);
857   }
858
859   XESetCloseDisplay(dpy, dpyPriv->codes->extension, __glXCloseDisplay);
860   XESetErrorString (dpy, dpyPriv->codes->extension,__glXErrorString);
861
862   dpyPriv->glXDrawHash = __glxHashCreate();
863
864#if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
865   glx_direct = (getenv("LIBGL_ALWAYS_INDIRECT") == NULL);
866   glx_accel = (getenv("LIBGL_ALWAYS_SOFTWARE") == NULL);
867
868   dpyPriv->drawHash = __glxHashCreate();
869
870   /*
871    ** Initialize the direct rendering per display data and functions.
872    ** Note: This _must_ be done before calling any other DRI routines
873    ** (e.g., those called in AllocAndFetchScreenConfigs).
874    */
875   if (glx_direct && glx_accel) {
876      dpyPriv->dri2Display = dri2CreateDisplay(dpy);
877      dpyPriv->driDisplay = driCreateDisplay(dpy);
878   }
879   if (glx_direct)
880      dpyPriv->driswDisplay = driswCreateDisplay(dpy);
881#endif
882
883#ifdef GLX_USE_APPLEGL
884   if (!applegl_create_display(dpyPriv)) {
885      Xfree(dpyPriv);
886      return NULL;
887   }
888#endif
889   if (!AllocAndFetchScreenConfigs(dpy, dpyPriv)) {
890      Xfree(dpyPriv);
891      return NULL;
892   }
893
894#ifdef USE_XCB
895   __glX_send_client_info(dpyPriv);
896#else
897   __glXClientInfo(dpy, dpyPriv->majorOpcode);
898#endif
899
900   /* Grab the lock again and add the dispay private, unless somebody
901    * beat us to initializing on this display in the meantime. */
902   _XLockMutex(_Xglobal_lock);
903
904   for (d = glx_displays; d; d = d->next) {
905      if (d->dpy == dpy) {
906	 _XUnlockMutex(_Xglobal_lock);
907	 glx_display_free(dpyPriv);
908	 return d;
909      }
910   }
911
912   dpyPriv->next = glx_displays;
913   glx_displays = dpyPriv;
914
915    _XUnlockMutex(_Xglobal_lock);
916
917   return dpyPriv;
918}
919
920/*
921** Setup for sending a GLX command on dpy.  Make sure the extension is
922** initialized.  Try to avoid calling __glXInitialize as its kinda slow.
923*/
924_X_HIDDEN CARD8
925__glXSetupForCommand(Display * dpy)
926{
927    struct glx_context *gc;
928    struct glx_display *priv;
929
930   /* If this thread has a current context, flush its rendering commands */
931   gc = __glXGetCurrentContext();
932   if (gc->currentDpy) {
933      /* Flush rendering buffer of the current context, if any */
934      (void) __glXFlushRenderBuffer(gc, gc->pc);
935
936      if (gc->currentDpy == dpy) {
937         /* Use opcode from gc because its right */
938         return gc->majorOpcode;
939      }
940      else {
941         /*
942          ** Have to get info about argument dpy because it might be to
943          ** a different server
944          */
945      }
946   }
947
948   /* Forced to lookup extension via the slow initialize route */
949   priv = __glXInitialize(dpy);
950   if (!priv) {
951      return 0;
952   }
953   return priv->majorOpcode;
954}
955
956/**
957 * Flush the drawing command transport buffer.
958 *
959 * \param ctx  Context whose transport buffer is to be flushed.
960 * \param pc   Pointer to first unused buffer location.
961 *
962 * \todo
963 * Modify this function to use \c ctx->pc instead of the explicit
964 * \c pc parameter.
965 */
966_X_HIDDEN GLubyte *
967__glXFlushRenderBuffer(struct glx_context * ctx, GLubyte * pc)
968{
969   Display *const dpy = ctx->currentDpy;
970#ifdef USE_XCB
971   xcb_connection_t *c = XGetXCBConnection(dpy);
972#else
973   xGLXRenderReq *req;
974#endif /* USE_XCB */
975   const GLint size = pc - ctx->buf;
976
977   if ((dpy != NULL) && (size > 0)) {
978#ifdef USE_XCB
979      xcb_glx_render(c, ctx->currentContextTag, size,
980                     (const uint8_t *) ctx->buf);
981#else
982      /* Send the entire buffer as an X request */
983      LockDisplay(dpy);
984      GetReq(GLXRender, req);
985      req->reqType = ctx->majorOpcode;
986      req->glxCode = X_GLXRender;
987      req->contextTag = ctx->currentContextTag;
988      req->length += (size + 3) >> 2;
989      _XSend(dpy, (char *) ctx->buf, size);
990      UnlockDisplay(dpy);
991      SyncHandle();
992#endif
993   }
994
995   /* Reset pointer and return it */
996   ctx->pc = ctx->buf;
997   return ctx->pc;
998}
999
1000
1001/**
1002 * Send a portion of a GLXRenderLarge command to the server.  The advantage of
1003 * this function over \c __glXSendLargeCommand is that callers can use the
1004 * data buffer in the GLX context and may be able to avoid allocating an
1005 * extra buffer.  The disadvantage is the clients will have to do more
1006 * GLX protocol work (i.e., calculating \c totalRequests, etc.).
1007 *
1008 * \sa __glXSendLargeCommand
1009 *
1010 * \param gc             GLX context
1011 * \param requestNumber  Which part of the whole command is this?  The first
1012 *                       request is 1.
1013 * \param totalRequests  How many requests will there be?
1014 * \param data           Command data.
1015 * \param dataLen        Size, in bytes, of the command data.
1016 */
1017_X_HIDDEN void
1018__glXSendLargeChunk(struct glx_context * gc, GLint requestNumber,
1019                    GLint totalRequests, const GLvoid * data, GLint dataLen)
1020{
1021   Display *dpy = gc->currentDpy;
1022#ifdef USE_XCB
1023   xcb_connection_t *c = XGetXCBConnection(dpy);
1024   xcb_glx_render_large(c, gc->currentContextTag, requestNumber,
1025                        totalRequests, dataLen, data);
1026#else
1027   xGLXRenderLargeReq *req;
1028
1029   if (requestNumber == 1) {
1030      LockDisplay(dpy);
1031   }
1032
1033   GetReq(GLXRenderLarge, req);
1034   req->reqType = gc->majorOpcode;
1035   req->glxCode = X_GLXRenderLarge;
1036   req->contextTag = gc->currentContextTag;
1037   req->length += (dataLen + 3) >> 2;
1038   req->requestNumber = requestNumber;
1039   req->requestTotal = totalRequests;
1040   req->dataBytes = dataLen;
1041   Data(dpy, data, dataLen);
1042
1043   if (requestNumber == totalRequests) {
1044      UnlockDisplay(dpy);
1045      SyncHandle();
1046   }
1047#endif /* USE_XCB */
1048}
1049
1050
1051/**
1052 * Send a command that is too large for the GLXRender protocol request.
1053 *
1054 * Send a large command, one that is too large for some reason to
1055 * send using the GLXRender protocol request.  One reason to send
1056 * a large command is to avoid copying the data.
1057 *
1058 * \param ctx        GLX context
1059 * \param header     Header data.
1060 * \param headerLen  Size, in bytes, of the header data.  It is assumed that
1061 *                   the header data will always be small enough to fit in
1062 *                   a single X protocol packet.
1063 * \param data       Command data.
1064 * \param dataLen    Size, in bytes, of the command data.
1065 */
1066_X_HIDDEN void
1067__glXSendLargeCommand(struct glx_context * ctx,
1068                      const GLvoid * header, GLint headerLen,
1069                      const GLvoid * data, GLint dataLen)
1070{
1071   GLint maxSize;
1072   GLint totalRequests, requestNumber;
1073
1074   /*
1075    ** Calculate the maximum amount of data can be stuffed into a single
1076    ** packet.  sz_xGLXRenderReq is added because bufSize is the maximum
1077    ** packet size minus sz_xGLXRenderReq.
1078    */
1079   maxSize = (ctx->bufSize + sz_xGLXRenderReq) - sz_xGLXRenderLargeReq;
1080   totalRequests = 1 + (dataLen / maxSize);
1081   if (dataLen % maxSize)
1082      totalRequests++;
1083
1084   /*
1085    ** Send all of the command, except the large array, as one request.
1086    */
1087   assert(headerLen <= maxSize);
1088   __glXSendLargeChunk(ctx, 1, totalRequests, header, headerLen);
1089
1090   /*
1091    ** Send enough requests until the whole array is sent.
1092    */
1093   for (requestNumber = 2; requestNumber <= (totalRequests - 1);
1094        requestNumber++) {
1095      __glXSendLargeChunk(ctx, requestNumber, totalRequests, data, maxSize);
1096      data = (const GLvoid *) (((const GLubyte *) data) + maxSize);
1097      dataLen -= maxSize;
1098      assert(dataLen > 0);
1099   }
1100
1101   assert(dataLen <= maxSize);
1102   __glXSendLargeChunk(ctx, requestNumber, totalRequests, data, dataLen);
1103}
1104
1105/************************************************************************/
1106
1107#ifdef DEBUG
1108_X_HIDDEN void
1109__glXDumpDrawBuffer(struct glx_context * ctx)
1110{
1111   GLubyte *p = ctx->buf;
1112   GLubyte *end = ctx->pc;
1113   GLushort opcode, length;
1114
1115   while (p < end) {
1116      /* Fetch opcode */
1117      opcode = *((GLushort *) p);
1118      length = *((GLushort *) (p + 2));
1119      printf("%2x: %5d: ", opcode, length);
1120      length -= 4;
1121      p += 4;
1122      while (length > 0) {
1123         printf("%08x ", *((unsigned *) p));
1124         p += 4;
1125         length -= 4;
1126      }
1127      printf("\n");
1128   }
1129}
1130#endif
1131