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   config->sRGBCapable = GL_FALSE;
409
410   /*
411    ** Additional properties may be in a list at the end
412    ** of the reply.  They are in pairs of property type
413    ** and property value.
414    */
415
416#define FETCH_OR_SET(tag) \
417    config-> tag = ( fbconfig_style_tags ) ? *bp++ : 1
418
419   for (i = 0; i < count; i += 2) {
420      long int tag = *bp++;
421
422      switch (tag) {
423      case GLX_RGBA:
424         FETCH_OR_SET(rgbMode);
425         break;
426      case GLX_BUFFER_SIZE:
427         config->rgbBits = *bp++;
428         break;
429      case GLX_LEVEL:
430         config->level = *bp++;
431         break;
432      case GLX_DOUBLEBUFFER:
433         FETCH_OR_SET(doubleBufferMode);
434         break;
435      case GLX_STEREO:
436         FETCH_OR_SET(stereoMode);
437         break;
438      case GLX_AUX_BUFFERS:
439         config->numAuxBuffers = *bp++;
440         break;
441      case GLX_RED_SIZE:
442         config->redBits = *bp++;
443         break;
444      case GLX_GREEN_SIZE:
445         config->greenBits = *bp++;
446         break;
447      case GLX_BLUE_SIZE:
448         config->blueBits = *bp++;
449         break;
450      case GLX_ALPHA_SIZE:
451         config->alphaBits = *bp++;
452         break;
453      case GLX_DEPTH_SIZE:
454         config->depthBits = *bp++;
455         break;
456      case GLX_STENCIL_SIZE:
457         config->stencilBits = *bp++;
458         break;
459      case GLX_ACCUM_RED_SIZE:
460         config->accumRedBits = *bp++;
461         break;
462      case GLX_ACCUM_GREEN_SIZE:
463         config->accumGreenBits = *bp++;
464         break;
465      case GLX_ACCUM_BLUE_SIZE:
466         config->accumBlueBits = *bp++;
467         break;
468      case GLX_ACCUM_ALPHA_SIZE:
469         config->accumAlphaBits = *bp++;
470         break;
471      case GLX_VISUAL_CAVEAT_EXT:
472         config->visualRating = *bp++;
473         break;
474      case GLX_X_VISUAL_TYPE:
475         config->visualType = *bp++;
476         break;
477      case GLX_TRANSPARENT_TYPE:
478         config->transparentPixel = *bp++;
479         break;
480      case GLX_TRANSPARENT_INDEX_VALUE:
481         config->transparentIndex = *bp++;
482         break;
483      case GLX_TRANSPARENT_RED_VALUE:
484         config->transparentRed = *bp++;
485         break;
486      case GLX_TRANSPARENT_GREEN_VALUE:
487         config->transparentGreen = *bp++;
488         break;
489      case GLX_TRANSPARENT_BLUE_VALUE:
490         config->transparentBlue = *bp++;
491         break;
492      case GLX_TRANSPARENT_ALPHA_VALUE:
493         config->transparentAlpha = *bp++;
494         break;
495      case GLX_VISUAL_ID:
496         config->visualID = *bp++;
497         break;
498      case GLX_DRAWABLE_TYPE:
499         config->drawableType = *bp++;
500#ifdef GLX_USE_APPLEGL
501         /* AppleSGLX supports pixmap and pbuffers with all config. */
502         config->drawableType |= GLX_WINDOW_BIT | GLX_PIXMAP_BIT | GLX_PBUFFER_BIT;
503#endif
504         break;
505      case GLX_RENDER_TYPE:
506         config->renderType = *bp++;
507         break;
508      case GLX_X_RENDERABLE:
509         config->xRenderable = *bp++;
510         break;
511      case GLX_FBCONFIG_ID:
512         config->fbconfigID = *bp++;
513         break;
514      case GLX_MAX_PBUFFER_WIDTH:
515         config->maxPbufferWidth = *bp++;
516         break;
517      case GLX_MAX_PBUFFER_HEIGHT:
518         config->maxPbufferHeight = *bp++;
519         break;
520      case GLX_MAX_PBUFFER_PIXELS:
521         config->maxPbufferPixels = *bp++;
522         break;
523#ifndef GLX_USE_APPLEGL
524      case GLX_OPTIMAL_PBUFFER_WIDTH_SGIX:
525         config->optimalPbufferWidth = *bp++;
526         break;
527      case GLX_OPTIMAL_PBUFFER_HEIGHT_SGIX:
528         config->optimalPbufferHeight = *bp++;
529         break;
530      case GLX_VISUAL_SELECT_GROUP_SGIX:
531         config->visualSelectGroup = *bp++;
532         break;
533      case GLX_SWAP_METHOD_OML:
534         config->swapMethod = *bp++;
535         break;
536#endif
537      case GLX_SAMPLE_BUFFERS_SGIS:
538         config->sampleBuffers = *bp++;
539         break;
540      case GLX_SAMPLES_SGIS:
541         config->samples = *bp++;
542         break;
543#ifdef GLX_USE_APPLEGL
544      case IGNORE_GLX_SWAP_METHOD_OML:
545         /* We ignore this tag.  See the comment above this function. */
546         ++bp;
547         break;
548#else
549      case GLX_BIND_TO_TEXTURE_RGB_EXT:
550         config->bindToTextureRgb = *bp++;
551         break;
552      case GLX_BIND_TO_TEXTURE_RGBA_EXT:
553         config->bindToTextureRgba = *bp++;
554         break;
555      case GLX_BIND_TO_MIPMAP_TEXTURE_EXT:
556         config->bindToMipmapTexture = *bp++;
557         break;
558      case GLX_BIND_TO_TEXTURE_TARGETS_EXT:
559         config->bindToTextureTargets = *bp++;
560         break;
561      case GLX_Y_INVERTED_EXT:
562         config->yInverted = *bp++;
563         break;
564#endif
565      case GLX_FRAMEBUFFER_SRGB_CAPABLE_EXT:
566         config->sRGBCapable = *bp++;
567         break;
568
569      case GLX_USE_GL:
570         if (fbconfig_style_tags)
571            bp++;
572         break;
573      case None:
574         i = count;
575         break;
576      default:
577         if(getenv("LIBGL_DIAGNOSTIC")) {
578             long int tagvalue = *bp++;
579             fprintf(stderr, "WARNING: unknown GLX tag from server: "
580                     "tag 0x%lx value 0x%lx\n", tag, tagvalue);
581         } else {
582             /* Ignore the unrecognized tag's value */
583             bp++;
584         }
585         break;
586      }
587   }
588
589   config->renderType =
590      (config->rgbMode) ? GLX_RGBA_BIT : GLX_COLOR_INDEX_BIT;
591}
592
593static struct glx_config *
594createConfigsFromProperties(Display * dpy, int nvisuals, int nprops,
595                            int screen, GLboolean tagged_only)
596{
597   INT32 buf[__GLX_TOTAL_CONFIG], *props;
598   unsigned prop_size;
599   struct glx_config *modes, *m;
600   int i;
601
602   if (nprops == 0)
603      return NULL;
604
605   /* FIXME: Is the __GLX_MIN_CONFIG_PROPS test correct for FBconfigs? */
606
607   /* Check number of properties */
608   if (nprops < __GLX_MIN_CONFIG_PROPS || nprops > __GLX_MAX_CONFIG_PROPS)
609      return NULL;
610
611   /* Allocate memory for our config structure */
612   modes = glx_config_create_list(nvisuals);
613   if (!modes)
614      return NULL;
615
616   prop_size = nprops * __GLX_SIZE_INT32;
617   if (prop_size <= sizeof(buf))
618      props = buf;
619   else
620      props = Xmalloc(prop_size);
621
622   /* Read each config structure and convert it into our format */
623   m = modes;
624   for (i = 0; i < nvisuals; i++) {
625      _XRead(dpy, (char *) props, prop_size);
626#ifdef GLX_USE_APPLEGL
627       /* Older X servers don't send this so we default it here. */
628      m->drawableType = GLX_WINDOW_BIT;
629#else
630      /*
631       * The XQuartz 2.3.2.1 X server doesn't set this properly, so
632       * set the proper bits here.
633       * AppleSGLX supports windows, pixmaps, and pbuffers with all config.
634       */
635      m->drawableType = GLX_WINDOW_BIT | GLX_PIXMAP_BIT | GLX_PBUFFER_BIT;
636#endif
637       __glXInitializeVisualConfigFromTags(m, nprops, props,
638                                          tagged_only, GL_TRUE);
639      m->screen = screen;
640      m = m->next;
641   }
642
643   if (props != buf)
644      Xfree(props);
645
646   return modes;
647}
648
649static GLboolean
650getVisualConfigs(struct glx_screen *psc,
651		  struct glx_display *priv, int screen)
652{
653   xGLXGetVisualConfigsReq *req;
654   xGLXGetVisualConfigsReply reply;
655   Display *dpy = priv->dpy;
656
657   LockDisplay(dpy);
658
659   psc->visuals = NULL;
660   GetReq(GLXGetVisualConfigs, req);
661   req->reqType = priv->majorOpcode;
662   req->glxCode = X_GLXGetVisualConfigs;
663   req->screen = screen;
664
665   if (!_XReply(dpy, (xReply *) & reply, 0, False))
666      goto out;
667
668   psc->visuals = createConfigsFromProperties(dpy,
669                                              reply.numVisuals,
670                                              reply.numProps,
671                                              screen, GL_FALSE);
672
673 out:
674   UnlockDisplay(dpy);
675   return psc->visuals != NULL;
676}
677
678static GLboolean
679 getFBConfigs(struct glx_screen *psc, struct glx_display *priv, int screen)
680{
681   xGLXGetFBConfigsReq *fb_req;
682   xGLXGetFBConfigsSGIXReq *sgi_req;
683   xGLXVendorPrivateWithReplyReq *vpreq;
684   xGLXGetFBConfigsReply reply;
685   Display *dpy = priv->dpy;
686
687   psc->serverGLXexts =
688      __glXQueryServerString(dpy, priv->majorOpcode, screen, GLX_EXTENSIONS);
689
690   LockDisplay(dpy);
691
692   psc->configs = NULL;
693   if (atof(priv->serverGLXversion) >= 1.3) {
694      GetReq(GLXGetFBConfigs, fb_req);
695      fb_req->reqType = priv->majorOpcode;
696      fb_req->glxCode = X_GLXGetFBConfigs;
697      fb_req->screen = screen;
698   }
699   else if (strstr(psc->serverGLXexts, "GLX_SGIX_fbconfig") != NULL) {
700      GetReqExtra(GLXVendorPrivateWithReply,
701                  sz_xGLXGetFBConfigsSGIXReq -
702                  sz_xGLXVendorPrivateWithReplyReq, vpreq);
703      sgi_req = (xGLXGetFBConfigsSGIXReq *) vpreq;
704      sgi_req->reqType = priv->majorOpcode;
705      sgi_req->glxCode = X_GLXVendorPrivateWithReply;
706      sgi_req->vendorCode = X_GLXvop_GetFBConfigsSGIX;
707      sgi_req->screen = screen;
708   }
709   else
710      goto out;
711
712   if (!_XReply(dpy, (xReply *) & reply, 0, False))
713      goto out;
714
715   psc->configs = createConfigsFromProperties(dpy,
716                                              reply.numFBConfigs,
717                                              reply.numAttribs * 2,
718                                              screen, GL_TRUE);
719
720 out:
721   UnlockDisplay(dpy);
722   return psc->configs != NULL;
723}
724
725_X_HIDDEN Bool
726glx_screen_init(struct glx_screen *psc,
727		 int screen, struct glx_display * priv)
728{
729   /* Initialize per screen dynamic client GLX extensions */
730   psc->ext_list_first_time = GL_TRUE;
731   psc->scr = screen;
732   psc->dpy = priv->dpy;
733   psc->display = priv;
734
735   getVisualConfigs(psc, priv, screen);
736   getFBConfigs(psc, priv, screen);
737
738   return GL_TRUE;
739}
740
741_X_HIDDEN void
742glx_screen_cleanup(struct glx_screen *psc)
743{
744   if (psc->configs) {
745      glx_config_destroy_list(psc->configs);
746      if (psc->effectiveGLXexts)
747          Xfree(psc->effectiveGLXexts);
748      psc->configs = NULL;   /* NOTE: just for paranoia */
749   }
750   if (psc->visuals) {
751      glx_config_destroy_list(psc->visuals);
752      psc->visuals = NULL;   /* NOTE: just for paranoia */
753   }
754   Xfree((char *) psc->serverGLXexts);
755}
756
757/*
758** Allocate the memory for the per screen configs for each screen.
759** If that works then fetch the per screen configs data.
760*/
761static Bool
762AllocAndFetchScreenConfigs(Display * dpy, struct glx_display * priv)
763{
764   struct glx_screen *psc;
765   GLint i, screens;
766
767   /*
768    ** First allocate memory for the array of per screen configs.
769    */
770   screens = ScreenCount(dpy);
771   priv->screens = Xmalloc(screens * sizeof *priv->screens);
772   if (!priv->screens)
773      return GL_FALSE;
774
775   priv->serverGLXversion =
776      __glXQueryServerString(dpy, priv->majorOpcode, 0, GLX_VERSION);
777   if (priv->serverGLXversion == NULL) {
778      FreeScreenConfigs(priv);
779      return GL_FALSE;
780   }
781
782   for (i = 0; i < screens; i++, psc++) {
783      psc = NULL;
784#if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
785      if (priv->dri2Display)
786	 psc = (*priv->dri2Display->createScreen) (i, priv);
787      if (psc == NULL && priv->driDisplay)
788	 psc = (*priv->driDisplay->createScreen) (i, priv);
789      if (psc == NULL && priv->driswDisplay)
790	 psc = (*priv->driswDisplay->createScreen) (i, priv);
791#endif
792#if defined(GLX_USE_APPLEGL)
793      if (psc == NULL)
794         psc = applegl_create_screen(i, priv);
795#else
796      if (psc == NULL)
797	 psc = indirect_create_screen(i, priv);
798#endif
799      priv->screens[i] = psc;
800   }
801   SyncHandle();
802   return GL_TRUE;
803}
804
805/*
806** Initialize the client side extension code.
807*/
808 _X_HIDDEN struct glx_display *
809__glXInitialize(Display * dpy)
810{
811   struct glx_display *dpyPriv, *d;
812#if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
813   Bool glx_direct, glx_accel;
814#endif
815   int i;
816
817   _XLockMutex(_Xglobal_lock);
818
819   for (dpyPriv = glx_displays; dpyPriv; dpyPriv = dpyPriv->next) {
820      if (dpyPriv->dpy == dpy) {
821	 _XUnlockMutex(_Xglobal_lock);
822	 return dpyPriv;
823      }
824   }
825
826   /* Drop the lock while we create the display private. */
827   _XUnlockMutex(_Xglobal_lock);
828
829   dpyPriv = Xcalloc(1, sizeof *dpyPriv);
830   if (!dpyPriv)
831      return NULL;
832
833   dpyPriv->codes = XInitExtension(dpy, __glXExtensionName);
834   if (!dpyPriv->codes) {
835      Xfree(dpyPriv);
836      _XUnlockMutex(_Xglobal_lock);
837      return NULL;
838   }
839
840   dpyPriv->dpy = dpy;
841   dpyPriv->majorOpcode = dpyPriv->codes->major_opcode;
842   dpyPriv->serverGLXvendor = 0x0;
843   dpyPriv->serverGLXversion = 0x0;
844
845   /* See if the versions are compatible.  This GLX implementation does not
846    * work with servers that only support GLX 1.0.
847    */
848   if (!QueryVersion(dpy, dpyPriv->majorOpcode,
849		     &dpyPriv->majorVersion, &dpyPriv->minorVersion)
850       || (dpyPriv->majorVersion == 1 && dpyPriv->minorVersion < 1)) {
851      Xfree(dpyPriv);
852      _XUnlockMutex(_Xglobal_lock);
853      return NULL;
854   }
855
856   for (i = 0; i < __GLX_NUMBER_EVENTS; i++) {
857      XESetWireToEvent(dpy, dpyPriv->codes->first_event + i, __glXWireToEvent);
858      XESetEventToWire(dpy, dpyPriv->codes->first_event + i, __glXEventToWire);
859   }
860
861   XESetCloseDisplay(dpy, dpyPriv->codes->extension, __glXCloseDisplay);
862   XESetErrorString (dpy, dpyPriv->codes->extension,__glXErrorString);
863
864   dpyPriv->glXDrawHash = __glxHashCreate();
865
866#if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
867   glx_direct = (getenv("LIBGL_ALWAYS_INDIRECT") == NULL);
868   glx_accel = (getenv("LIBGL_ALWAYS_SOFTWARE") == NULL);
869
870   dpyPriv->drawHash = __glxHashCreate();
871
872   /*
873    ** Initialize the direct rendering per display data and functions.
874    ** Note: This _must_ be done before calling any other DRI routines
875    ** (e.g., those called in AllocAndFetchScreenConfigs).
876    */
877   if (glx_direct && glx_accel) {
878      dpyPriv->dri2Display = dri2CreateDisplay(dpy);
879      dpyPriv->driDisplay = driCreateDisplay(dpy);
880   }
881   if (glx_direct)
882      dpyPriv->driswDisplay = driswCreateDisplay(dpy);
883#endif
884
885#ifdef GLX_USE_APPLEGL
886   if (!applegl_create_display(dpyPriv)) {
887      Xfree(dpyPriv);
888      return NULL;
889   }
890#endif
891   if (!AllocAndFetchScreenConfigs(dpy, dpyPriv)) {
892      Xfree(dpyPriv);
893      return NULL;
894   }
895
896#ifdef USE_XCB
897   __glX_send_client_info(dpyPriv);
898#else
899   __glXClientInfo(dpy, dpyPriv->majorOpcode);
900#endif
901
902   /* Grab the lock again and add the dispay private, unless somebody
903    * beat us to initializing on this display in the meantime. */
904   _XLockMutex(_Xglobal_lock);
905
906   for (d = glx_displays; d; d = d->next) {
907      if (d->dpy == dpy) {
908	 _XUnlockMutex(_Xglobal_lock);
909	 glx_display_free(dpyPriv);
910	 return d;
911      }
912   }
913
914   dpyPriv->next = glx_displays;
915   glx_displays = dpyPriv;
916
917    _XUnlockMutex(_Xglobal_lock);
918
919   return dpyPriv;
920}
921
922/*
923** Setup for sending a GLX command on dpy.  Make sure the extension is
924** initialized.  Try to avoid calling __glXInitialize as its kinda slow.
925*/
926_X_HIDDEN CARD8
927__glXSetupForCommand(Display * dpy)
928{
929    struct glx_context *gc;
930    struct glx_display *priv;
931
932   /* If this thread has a current context, flush its rendering commands */
933   gc = __glXGetCurrentContext();
934   if (gc->currentDpy) {
935      /* Flush rendering buffer of the current context, if any */
936      (void) __glXFlushRenderBuffer(gc, gc->pc);
937
938      if (gc->currentDpy == dpy) {
939         /* Use opcode from gc because its right */
940         return gc->majorOpcode;
941      }
942      else {
943         /*
944          ** Have to get info about argument dpy because it might be to
945          ** a different server
946          */
947      }
948   }
949
950   /* Forced to lookup extension via the slow initialize route */
951   priv = __glXInitialize(dpy);
952   if (!priv) {
953      return 0;
954   }
955   return priv->majorOpcode;
956}
957
958/**
959 * Flush the drawing command transport buffer.
960 *
961 * \param ctx  Context whose transport buffer is to be flushed.
962 * \param pc   Pointer to first unused buffer location.
963 *
964 * \todo
965 * Modify this function to use \c ctx->pc instead of the explicit
966 * \c pc parameter.
967 */
968_X_HIDDEN GLubyte *
969__glXFlushRenderBuffer(struct glx_context * ctx, GLubyte * pc)
970{
971   Display *const dpy = ctx->currentDpy;
972#ifdef USE_XCB
973   xcb_connection_t *c = XGetXCBConnection(dpy);
974#else
975   xGLXRenderReq *req;
976#endif /* USE_XCB */
977   const GLint size = pc - ctx->buf;
978
979   if ((dpy != NULL) && (size > 0)) {
980#ifdef USE_XCB
981      xcb_glx_render(c, ctx->currentContextTag, size,
982                     (const uint8_t *) ctx->buf);
983#else
984      /* Send the entire buffer as an X request */
985      LockDisplay(dpy);
986      GetReq(GLXRender, req);
987      req->reqType = ctx->majorOpcode;
988      req->glxCode = X_GLXRender;
989      req->contextTag = ctx->currentContextTag;
990      req->length += (size + 3) >> 2;
991      _XSend(dpy, (char *) ctx->buf, size);
992      UnlockDisplay(dpy);
993      SyncHandle();
994#endif
995   }
996
997   /* Reset pointer and return it */
998   ctx->pc = ctx->buf;
999   return ctx->pc;
1000}
1001
1002
1003/**
1004 * Send a portion of a GLXRenderLarge command to the server.  The advantage of
1005 * this function over \c __glXSendLargeCommand is that callers can use the
1006 * data buffer in the GLX context and may be able to avoid allocating an
1007 * extra buffer.  The disadvantage is the clients will have to do more
1008 * GLX protocol work (i.e., calculating \c totalRequests, etc.).
1009 *
1010 * \sa __glXSendLargeCommand
1011 *
1012 * \param gc             GLX context
1013 * \param requestNumber  Which part of the whole command is this?  The first
1014 *                       request is 1.
1015 * \param totalRequests  How many requests will there be?
1016 * \param data           Command data.
1017 * \param dataLen        Size, in bytes, of the command data.
1018 */
1019_X_HIDDEN void
1020__glXSendLargeChunk(struct glx_context * gc, GLint requestNumber,
1021                    GLint totalRequests, const GLvoid * data, GLint dataLen)
1022{
1023   Display *dpy = gc->currentDpy;
1024#ifdef USE_XCB
1025   xcb_connection_t *c = XGetXCBConnection(dpy);
1026   xcb_glx_render_large(c, gc->currentContextTag, requestNumber,
1027                        totalRequests, dataLen, data);
1028#else
1029   xGLXRenderLargeReq *req;
1030
1031   if (requestNumber == 1) {
1032      LockDisplay(dpy);
1033   }
1034
1035   GetReq(GLXRenderLarge, req);
1036   req->reqType = gc->majorOpcode;
1037   req->glxCode = X_GLXRenderLarge;
1038   req->contextTag = gc->currentContextTag;
1039   req->length += (dataLen + 3) >> 2;
1040   req->requestNumber = requestNumber;
1041   req->requestTotal = totalRequests;
1042   req->dataBytes = dataLen;
1043   Data(dpy, data, dataLen);
1044
1045   if (requestNumber == totalRequests) {
1046      UnlockDisplay(dpy);
1047      SyncHandle();
1048   }
1049#endif /* USE_XCB */
1050}
1051
1052
1053/**
1054 * Send a command that is too large for the GLXRender protocol request.
1055 *
1056 * Send a large command, one that is too large for some reason to
1057 * send using the GLXRender protocol request.  One reason to send
1058 * a large command is to avoid copying the data.
1059 *
1060 * \param ctx        GLX context
1061 * \param header     Header data.
1062 * \param headerLen  Size, in bytes, of the header data.  It is assumed that
1063 *                   the header data will always be small enough to fit in
1064 *                   a single X protocol packet.
1065 * \param data       Command data.
1066 * \param dataLen    Size, in bytes, of the command data.
1067 */
1068_X_HIDDEN void
1069__glXSendLargeCommand(struct glx_context * ctx,
1070                      const GLvoid * header, GLint headerLen,
1071                      const GLvoid * data, GLint dataLen)
1072{
1073   GLint maxSize;
1074   GLint totalRequests, requestNumber;
1075
1076   /*
1077    ** Calculate the maximum amount of data can be stuffed into a single
1078    ** packet.  sz_xGLXRenderReq is added because bufSize is the maximum
1079    ** packet size minus sz_xGLXRenderReq.
1080    */
1081   maxSize = (ctx->bufSize + sz_xGLXRenderReq) - sz_xGLXRenderLargeReq;
1082   totalRequests = 1 + (dataLen / maxSize);
1083   if (dataLen % maxSize)
1084      totalRequests++;
1085
1086   /*
1087    ** Send all of the command, except the large array, as one request.
1088    */
1089   assert(headerLen <= maxSize);
1090   __glXSendLargeChunk(ctx, 1, totalRequests, header, headerLen);
1091
1092   /*
1093    ** Send enough requests until the whole array is sent.
1094    */
1095   for (requestNumber = 2; requestNumber <= (totalRequests - 1);
1096        requestNumber++) {
1097      __glXSendLargeChunk(ctx, requestNumber, totalRequests, data, maxSize);
1098      data = (const GLvoid *) (((const GLubyte *) data) + maxSize);
1099      dataLen -= maxSize;
1100      assert(dataLen > 0);
1101   }
1102
1103   assert(dataLen <= maxSize);
1104   __glXSendLargeChunk(ctx, requestNumber, totalRequests, data, dataLen);
1105}
1106
1107/************************************************************************/
1108
1109#ifdef DEBUG
1110_X_HIDDEN void
1111__glXDumpDrawBuffer(struct glx_context * ctx)
1112{
1113   GLubyte *p = ctx->buf;
1114   GLubyte *end = ctx->pc;
1115   GLushort opcode, length;
1116
1117   while (p < end) {
1118      /* Fetch opcode */
1119      opcode = *((GLushort *) p);
1120      length = *((GLushort *) (p + 2));
1121      printf("%2x: %5d: ", opcode, length);
1122      length -= 4;
1123      p += 4;
1124      while (length > 0) {
1125         printf("%08x ", *((unsigned *) p));
1126         p += 4;
1127         length -= 4;
1128      }
1129      printf("\n");
1130   }
1131}
1132#endif
1133