glxext.c revision 0f20e2e18f902b4319851643e1775a18c2aacb3d 
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};
87
88#ifdef GLX_USE_APPLEGL
89static char *__glXErrorString(Display *dpy, int code, XExtCodes *codes,
90                              char *buf, int n);
91#endif
92
93static
94XEXT_GENERATE_ERROR_STRING(__glXErrorString, __glXExtensionName,
95                           __GLX_NUMBER_ERRORS, error_list)
96
97/*
98 * GLX events are a bit funky.  We don't stuff the X event code into
99 * our user exposed (via XNextEvent) structure.  Instead we use the GLX
100 * private event code namespace (and hope it doesn't conflict).  Clients
101 * have to know that bit 15 in the event type field means they're getting
102 * a GLX event, and then handle the various sub-event types there, rather
103 * than simply checking the event code and handling it directly.
104 */
105
106static Bool
107__glXWireToEvent(Display *dpy, XEvent *event, xEvent *wire)
108{
109     struct glx_display *glx_dpy = __glXInitialize(dpy);
110
111   if (glx_dpy == NULL)
112      return False;
113
114   switch ((wire->u.u.type & 0x7f) - glx_dpy->codes->first_event) {
115   case GLX_PbufferClobber:
116   {
117      GLXPbufferClobberEvent *aevent = (GLXPbufferClobberEvent *)event;
118      xGLXPbufferClobberEvent *awire = (xGLXPbufferClobberEvent *)wire;
119      aevent->event_type = awire->type;
120      aevent->serial = awire->sequenceNumber;
121      aevent->event_type = awire->event_type;
122      aevent->draw_type = awire->draw_type;
123      aevent->drawable = awire->drawable;
124      aevent->buffer_mask = awire->buffer_mask;
125      aevent->aux_buffer = awire->aux_buffer;
126      aevent->x = awire->x;
127      aevent->y = awire->y;
128      aevent->width = awire->width;
129      aevent->height = awire->height;
130      aevent->count = awire->count;
131      return True;
132   }
133   case GLX_BufferSwapComplete:
134   {
135      GLXBufferSwapComplete *aevent = (GLXBufferSwapComplete *)event;
136      xGLXBufferSwapComplete2 *awire = (xGLXBufferSwapComplete2 *)wire;
137      struct glx_drawable *glxDraw = GetGLXDrawable(dpy, awire->drawable);
138      aevent->event_type = awire->event_type;
139      aevent->drawable = awire->drawable;
140      aevent->ust = ((CARD64)awire->ust_hi << 32) | awire->ust_lo;
141      aevent->msc = ((CARD64)awire->msc_hi << 32) | awire->msc_lo;
142
143      if (!glxDraw)
144	 return False;
145
146      if (awire->sbc < glxDraw->lastEventSbc)
147	 glxDraw->eventSbcWrap += 0x100000000;
148      glxDraw->lastEventSbc = awire->sbc;
149      aevent->sbc = awire->sbc + glxDraw->eventSbcWrap;
150      return True;
151   }
152   default:
153      /* client doesn't support server event */
154      break;
155   }
156
157   return False;
158}
159
160/* We don't actually support this.  It doesn't make sense for clients to
161 * send each other GLX events.
162 */
163static Status
164__glXEventToWire(Display *dpy, XEvent *event, xEvent *wire)
165{
166     struct glx_display *glx_dpy = __glXInitialize(dpy);
167
168   if (glx_dpy == NULL)
169      return False;
170
171   switch (event->type) {
172   case GLX_DAMAGED:
173      break;
174   case GLX_SAVED:
175      break;
176   case GLX_EXCHANGE_COMPLETE_INTEL:
177      break;
178   case GLX_COPY_COMPLETE_INTEL:
179      break;
180   case GLX_FLIP_COMPLETE_INTEL:
181      break;
182   default:
183      /* client doesn't support server event */
184      break;
185   }
186
187   return Success;
188}
189
190/************************************************************************/
191/*
192** Free the per screen configs data as well as the array of
193** __glXScreenConfigs.
194*/
195static void
196FreeScreenConfigs(struct glx_display * priv)
197{
198   struct glx_screen *psc;
199   GLint i, screens;
200
201   /* Free screen configuration information */
202   screens = ScreenCount(priv->dpy);
203   for (i = 0; i < screens; i++) {
204      psc = priv->screens[i];
205      glx_screen_cleanup(psc);
206
207#if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
208      if (psc->driScreen) {
209         psc->driScreen->destroyScreen(psc);
210      } else {
211	 Xfree(psc);
212      }
213#else
214      Xfree(psc);
215#endif
216   }
217   XFree((char *) priv->screens);
218   priv->screens = NULL;
219}
220
221static void
222glx_display_free(struct glx_display *priv)
223{
224   struct glx_context *gc;
225
226   gc = __glXGetCurrentContext();
227   if (priv->dpy == gc->currentDpy) {
228      gc->vtable->destroy(gc);
229      __glXSetCurrentContextNull();
230   }
231
232   FreeScreenConfigs(priv);
233   if (priv->serverGLXvendor)
234      Xfree((char *) priv->serverGLXvendor);
235   if (priv->serverGLXversion)
236      Xfree((char *) priv->serverGLXversion);
237
238   __glxHashDestroy(priv->glXDrawHash);
239
240#if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
241   __glxHashDestroy(priv->drawHash);
242
243   /* Free the direct rendering per display data */
244   if (priv->driswDisplay)
245      (*priv->driswDisplay->destroyDisplay) (priv->driswDisplay);
246   priv->driswDisplay = NULL;
247
248   if (priv->driDisplay)
249      (*priv->driDisplay->destroyDisplay) (priv->driDisplay);
250   priv->driDisplay = NULL;
251
252   if (priv->dri2Display)
253      (*priv->dri2Display->destroyDisplay) (priv->dri2Display);
254   priv->dri2Display = NULL;
255#endif
256
257   Xfree((char *) priv);
258}
259
260static int
261__glXCloseDisplay(Display * dpy, XExtCodes * codes)
262{
263   struct glx_display *priv, **prev;
264
265   _XLockMutex(_Xglobal_lock);
266   prev = &glx_displays;
267   for (priv = glx_displays; priv; prev = &priv->next, priv = priv->next) {
268      if (priv->dpy == dpy) {
269         *prev = priv->next;
270	 break;
271      }
272   }
273   _XUnlockMutex(_Xglobal_lock);
274
275   glx_display_free(priv);
276
277   return 1;
278}
279
280/*
281** Query the version of the GLX extension.  This procedure works even if
282** the client extension is not completely set up.
283*/
284static Bool
285QueryVersion(Display * dpy, int opcode, int *major, int *minor)
286{
287#ifdef USE_XCB
288   xcb_connection_t *c = XGetXCBConnection(dpy);
289   xcb_glx_query_version_reply_t *reply = xcb_glx_query_version_reply(c,
290                                                                      xcb_glx_query_version
291                                                                      (c,
292                                                                       GLX_MAJOR_VERSION,
293                                                                       GLX_MINOR_VERSION),
294                                                                      NULL);
295
296   if (reply->major_version != GLX_MAJOR_VERSION) {
297      free(reply);
298      return GL_FALSE;
299   }
300   *major = reply->major_version;
301   *minor = min(reply->minor_version, GLX_MINOR_VERSION);
302   free(reply);
303   return GL_TRUE;
304#else
305   xGLXQueryVersionReq *req;
306   xGLXQueryVersionReply reply;
307
308   /* Send the glXQueryVersion request */
309   LockDisplay(dpy);
310   GetReq(GLXQueryVersion, req);
311   req->reqType = opcode;
312   req->glxCode = X_GLXQueryVersion;
313   req->majorVersion = GLX_MAJOR_VERSION;
314   req->minorVersion = GLX_MINOR_VERSION;
315   _XReply(dpy, (xReply *) & reply, 0, False);
316   UnlockDisplay(dpy);
317   SyncHandle();
318
319   if (reply.majorVersion != GLX_MAJOR_VERSION) {
320      /*
321       ** The server does not support the same major release as this
322       ** client.
323       */
324      return GL_FALSE;
325   }
326   *major = reply.majorVersion;
327   *minor = min(reply.minorVersion, GLX_MINOR_VERSION);
328   return GL_TRUE;
329#endif /* USE_XCB */
330}
331
332/*
333 * We don't want to enable this GLX_OML_swap_method in glxext.h,
334 * because we can't support it.  The X server writes it out though,
335 * so we should handle it somehow, to avoid false warnings.
336 */
337enum {
338    IGNORE_GLX_SWAP_METHOD_OML = 0x8060
339};
340
341
342static GLint
343convert_from_x_visual_type(int visualType)
344{
345   static const int glx_visual_types[] = {
346      GLX_STATIC_GRAY, GLX_GRAY_SCALE,
347      GLX_STATIC_COLOR, GLX_PSEUDO_COLOR,
348      GLX_TRUE_COLOR, GLX_DIRECT_COLOR
349   };
350
351   if (visualType < ARRAY_SIZE(glx_visual_types))
352      return glx_visual_types[visualType];
353
354   return GLX_NONE;
355}
356
357/*
358 * getVisualConfigs uses the !tagged_only path.
359 * getFBConfigs uses the tagged_only path.
360 */
361_X_HIDDEN void
362__glXInitializeVisualConfigFromTags(struct glx_config * config, int count,
363                                    const INT32 * bp, Bool tagged_only,
364                                    Bool fbconfig_style_tags)
365{
366   int i;
367
368   if (!tagged_only) {
369      /* Copy in the first set of properties */
370      config->visualID = *bp++;
371
372      config->visualType = convert_from_x_visual_type(*bp++);
373
374      config->rgbMode = *bp++;
375
376      config->redBits = *bp++;
377      config->greenBits = *bp++;
378      config->blueBits = *bp++;
379      config->alphaBits = *bp++;
380      config->accumRedBits = *bp++;
381      config->accumGreenBits = *bp++;
382      config->accumBlueBits = *bp++;
383      config->accumAlphaBits = *bp++;
384
385      config->doubleBufferMode = *bp++;
386      config->stereoMode = *bp++;
387
388      config->rgbBits = *bp++;
389      config->depthBits = *bp++;
390      config->stencilBits = *bp++;
391      config->numAuxBuffers = *bp++;
392      config->level = *bp++;
393
394#ifdef GLX_USE_APPLEGL
395       /* AppleSGLX supports pixmap and pbuffers with all config. */
396       config->drawableType = GLX_WINDOW_BIT | GLX_PIXMAP_BIT | GLX_PBUFFER_BIT;
397       /* Unfortunately this can create an ABI compatibility problem. */
398       count -= 18;
399#else
400      count -= __GLX_MIN_CONFIG_PROPS;
401#endif
402   }
403
404   /*
405    ** Additional properties may be in a list at the end
406    ** of the reply.  They are in pairs of property type
407    ** and property value.
408    */
409
410#define FETCH_OR_SET(tag) \
411    config-> tag = ( fbconfig_style_tags ) ? *bp++ : 1
412
413   for (i = 0; i < count; i += 2) {
414      long int tag = *bp++;
415
416      switch (tag) {
417      case GLX_RGBA:
418         FETCH_OR_SET(rgbMode);
419         break;
420      case GLX_BUFFER_SIZE:
421         config->rgbBits = *bp++;
422         break;
423      case GLX_LEVEL:
424         config->level = *bp++;
425         break;
426      case GLX_DOUBLEBUFFER:
427         FETCH_OR_SET(doubleBufferMode);
428         break;
429      case GLX_STEREO:
430         FETCH_OR_SET(stereoMode);
431         break;
432      case GLX_AUX_BUFFERS:
433         config->numAuxBuffers = *bp++;
434         break;
435      case GLX_RED_SIZE:
436         config->redBits = *bp++;
437         break;
438      case GLX_GREEN_SIZE:
439         config->greenBits = *bp++;
440         break;
441      case GLX_BLUE_SIZE:
442         config->blueBits = *bp++;
443         break;
444      case GLX_ALPHA_SIZE:
445         config->alphaBits = *bp++;
446         break;
447      case GLX_DEPTH_SIZE:
448         config->depthBits = *bp++;
449         break;
450      case GLX_STENCIL_SIZE:
451         config->stencilBits = *bp++;
452         break;
453      case GLX_ACCUM_RED_SIZE:
454         config->accumRedBits = *bp++;
455         break;
456      case GLX_ACCUM_GREEN_SIZE:
457         config->accumGreenBits = *bp++;
458         break;
459      case GLX_ACCUM_BLUE_SIZE:
460         config->accumBlueBits = *bp++;
461         break;
462      case GLX_ACCUM_ALPHA_SIZE:
463         config->accumAlphaBits = *bp++;
464         break;
465      case GLX_VISUAL_CAVEAT_EXT:
466         config->visualRating = *bp++;
467         break;
468      case GLX_X_VISUAL_TYPE:
469         config->visualType = *bp++;
470         break;
471      case GLX_TRANSPARENT_TYPE:
472         config->transparentPixel = *bp++;
473         break;
474      case GLX_TRANSPARENT_INDEX_VALUE:
475         config->transparentIndex = *bp++;
476         break;
477      case GLX_TRANSPARENT_RED_VALUE:
478         config->transparentRed = *bp++;
479         break;
480      case GLX_TRANSPARENT_GREEN_VALUE:
481         config->transparentGreen = *bp++;
482         break;
483      case GLX_TRANSPARENT_BLUE_VALUE:
484         config->transparentBlue = *bp++;
485         break;
486      case GLX_TRANSPARENT_ALPHA_VALUE:
487         config->transparentAlpha = *bp++;
488         break;
489      case GLX_VISUAL_ID:
490         config->visualID = *bp++;
491         break;
492      case GLX_DRAWABLE_TYPE:
493         config->drawableType = *bp++;
494#ifdef GLX_USE_APPLEGL
495         /* AppleSGLX supports pixmap and pbuffers with all config. */
496         config->drawableType |= GLX_WINDOW_BIT | GLX_PIXMAP_BIT | GLX_PBUFFER_BIT;
497#endif
498         break;
499      case GLX_RENDER_TYPE:
500         config->renderType = *bp++;
501         break;
502      case GLX_X_RENDERABLE:
503         config->xRenderable = *bp++;
504         break;
505      case GLX_FBCONFIG_ID:
506         config->fbconfigID = *bp++;
507         break;
508      case GLX_MAX_PBUFFER_WIDTH:
509         config->maxPbufferWidth = *bp++;
510         break;
511      case GLX_MAX_PBUFFER_HEIGHT:
512         config->maxPbufferHeight = *bp++;
513         break;
514      case GLX_MAX_PBUFFER_PIXELS:
515         config->maxPbufferPixels = *bp++;
516         break;
517#ifndef GLX_USE_APPLEGL
518      case GLX_OPTIMAL_PBUFFER_WIDTH_SGIX:
519         config->optimalPbufferWidth = *bp++;
520         break;
521      case GLX_OPTIMAL_PBUFFER_HEIGHT_SGIX:
522         config->optimalPbufferHeight = *bp++;
523         break;
524      case GLX_VISUAL_SELECT_GROUP_SGIX:
525         config->visualSelectGroup = *bp++;
526         break;
527      case GLX_SWAP_METHOD_OML:
528         config->swapMethod = *bp++;
529         break;
530#endif
531      case GLX_SAMPLE_BUFFERS_SGIS:
532         config->sampleBuffers = *bp++;
533         break;
534      case GLX_SAMPLES_SGIS:
535         config->samples = *bp++;
536         break;
537#ifdef GLX_USE_APPLEGL
538      case IGNORE_GLX_SWAP_METHOD_OML:
539         /* We ignore this tag.  See the comment above this function. */
540         ++bp;
541         break;
542#else
543      case GLX_BIND_TO_TEXTURE_RGB_EXT:
544         config->bindToTextureRgb = *bp++;
545         break;
546      case GLX_BIND_TO_TEXTURE_RGBA_EXT:
547         config->bindToTextureRgba = *bp++;
548         break;
549      case GLX_BIND_TO_MIPMAP_TEXTURE_EXT:
550         config->bindToMipmapTexture = *bp++;
551         break;
552      case GLX_BIND_TO_TEXTURE_TARGETS_EXT:
553         config->bindToTextureTargets = *bp++;
554         break;
555      case GLX_Y_INVERTED_EXT:
556         config->yInverted = *bp++;
557         break;
558#endif
559      case GLX_FRAMEBUFFER_SRGB_CAPABLE_EXT:
560         config->sRGBCapable = *bp++;
561         break;
562
563      case GLX_USE_GL:
564         if (fbconfig_style_tags)
565            bp++;
566         break;
567      case None:
568         i = count;
569         break;
570      default:
571         if(getenv("LIBGL_DIAGNOSTIC")) {
572             long int tagvalue = *bp++;
573             fprintf(stderr, "WARNING: unknown GLX tag from server: "
574                     "tag 0x%lx value 0x%lx\n", tag, tagvalue);
575         } else {
576             /* Ignore the unrecognized tag's value */
577             bp++;
578         }
579         break;
580      }
581   }
582
583   config->renderType =
584      (config->rgbMode) ? GLX_RGBA_BIT : GLX_COLOR_INDEX_BIT;
585}
586
587static struct glx_config *
588createConfigsFromProperties(Display * dpy, int nvisuals, int nprops,
589                            int screen, GLboolean tagged_only)
590{
591   INT32 buf[__GLX_TOTAL_CONFIG], *props;
592   unsigned prop_size;
593   struct glx_config *modes, *m;
594   int i;
595
596   if (nprops == 0)
597      return NULL;
598
599   /* FIXME: Is the __GLX_MIN_CONFIG_PROPS test correct for FBconfigs? */
600
601   /* Check number of properties */
602   if (nprops < __GLX_MIN_CONFIG_PROPS || nprops > __GLX_MAX_CONFIG_PROPS)
603      return NULL;
604
605   /* Allocate memory for our config structure */
606   modes = glx_config_create_list(nvisuals);
607   if (!modes)
608      return NULL;
609
610   prop_size = nprops * __GLX_SIZE_INT32;
611   if (prop_size <= sizeof(buf))
612      props = buf;
613   else
614      props = Xmalloc(prop_size);
615
616   /* Read each config structure and convert it into our format */
617   m = modes;
618   for (i = 0; i < nvisuals; i++) {
619      _XRead(dpy, (char *) props, prop_size);
620#ifdef GLX_USE_APPLEGL
621       /* Older X servers don't send this so we default it here. */
622      m->drawableType = GLX_WINDOW_BIT;
623#else
624      /*
625       * The XQuartz 2.3.2.1 X server doesn't set this properly, so
626       * set the proper bits here.
627       * AppleSGLX supports windows, pixmaps, and pbuffers with all config.
628       */
629      m->drawableType = GLX_WINDOW_BIT | GLX_PIXMAP_BIT | GLX_PBUFFER_BIT;
630#endif
631       __glXInitializeVisualConfigFromTags(m, nprops, props,
632                                          tagged_only, GL_TRUE);
633      m->screen = screen;
634      m = m->next;
635   }
636
637   if (props != buf)
638      Xfree(props);
639
640   return modes;
641}
642
643static GLboolean
644getVisualConfigs(struct glx_screen *psc,
645		  struct glx_display *priv, int screen)
646{
647   xGLXGetVisualConfigsReq *req;
648   xGLXGetVisualConfigsReply reply;
649   Display *dpy = priv->dpy;
650
651   LockDisplay(dpy);
652
653   psc->visuals = NULL;
654   GetReq(GLXGetVisualConfigs, req);
655   req->reqType = priv->majorOpcode;
656   req->glxCode = X_GLXGetVisualConfigs;
657   req->screen = screen;
658
659   if (!_XReply(dpy, (xReply *) & reply, 0, False))
660      goto out;
661
662   psc->visuals = createConfigsFromProperties(dpy,
663                                              reply.numVisuals,
664                                              reply.numProps,
665                                              screen, GL_FALSE);
666
667 out:
668   UnlockDisplay(dpy);
669   return psc->visuals != NULL;
670}
671
672static GLboolean
673 getFBConfigs(struct glx_screen *psc, struct glx_display *priv, int screen)
674{
675   xGLXGetFBConfigsReq *fb_req;
676   xGLXGetFBConfigsSGIXReq *sgi_req;
677   xGLXVendorPrivateWithReplyReq *vpreq;
678   xGLXGetFBConfigsReply reply;
679   Display *dpy = priv->dpy;
680
681   psc->serverGLXexts =
682      __glXQueryServerString(dpy, priv->majorOpcode, screen, GLX_EXTENSIONS);
683
684   LockDisplay(dpy);
685
686   psc->configs = NULL;
687   if (atof(priv->serverGLXversion) >= 1.3) {
688      GetReq(GLXGetFBConfigs, fb_req);
689      fb_req->reqType = priv->majorOpcode;
690      fb_req->glxCode = X_GLXGetFBConfigs;
691      fb_req->screen = screen;
692   }
693   else if (strstr(psc->serverGLXexts, "GLX_SGIX_fbconfig") != NULL) {
694      GetReqExtra(GLXVendorPrivateWithReply,
695                  sz_xGLXGetFBConfigsSGIXReq -
696                  sz_xGLXVendorPrivateWithReplyReq, vpreq);
697      sgi_req = (xGLXGetFBConfigsSGIXReq *) vpreq;
698      sgi_req->reqType = priv->majorOpcode;
699      sgi_req->glxCode = X_GLXVendorPrivateWithReply;
700      sgi_req->vendorCode = X_GLXvop_GetFBConfigsSGIX;
701      sgi_req->screen = screen;
702   }
703   else
704      goto out;
705
706   if (!_XReply(dpy, (xReply *) & reply, 0, False))
707      goto out;
708
709   psc->configs = createConfigsFromProperties(dpy,
710                                              reply.numFBConfigs,
711                                              reply.numAttribs * 2,
712                                              screen, GL_TRUE);
713
714 out:
715   UnlockDisplay(dpy);
716   return psc->configs != NULL;
717}
718
719_X_HIDDEN Bool
720glx_screen_init(struct glx_screen *psc,
721		 int screen, struct glx_display * priv)
722{
723   /* Initialize per screen dynamic client GLX extensions */
724   psc->ext_list_first_time = GL_TRUE;
725   psc->scr = screen;
726   psc->dpy = priv->dpy;
727   psc->display = priv;
728
729   getVisualConfigs(psc, priv, screen);
730   getFBConfigs(psc, priv, screen);
731
732   return GL_TRUE;
733}
734
735_X_HIDDEN void
736glx_screen_cleanup(struct glx_screen *psc)
737{
738   if (psc->configs) {
739      glx_config_destroy_list(psc->configs);
740      if (psc->effectiveGLXexts)
741          Xfree(psc->effectiveGLXexts);
742      psc->configs = NULL;   /* NOTE: just for paranoia */
743   }
744   if (psc->visuals) {
745      glx_config_destroy_list(psc->visuals);
746      psc->visuals = NULL;   /* NOTE: just for paranoia */
747   }
748   Xfree((char *) psc->serverGLXexts);
749}
750
751/*
752** Allocate the memory for the per screen configs for each screen.
753** If that works then fetch the per screen configs data.
754*/
755static Bool
756AllocAndFetchScreenConfigs(Display * dpy, struct glx_display * priv)
757{
758   struct glx_screen *psc;
759   GLint i, screens;
760
761   /*
762    ** First allocate memory for the array of per screen configs.
763    */
764   screens = ScreenCount(dpy);
765   priv->screens = Xmalloc(screens * sizeof *priv->screens);
766   if (!priv->screens)
767      return GL_FALSE;
768
769   priv->serverGLXversion =
770      __glXQueryServerString(dpy, priv->majorOpcode, 0, GLX_VERSION);
771   if (priv->serverGLXversion == NULL) {
772      FreeScreenConfigs(priv);
773      return GL_FALSE;
774   }
775
776   for (i = 0; i < screens; i++, psc++) {
777      psc = NULL;
778#if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
779      if (priv->dri2Display)
780	 psc = (*priv->dri2Display->createScreen) (i, priv);
781      if (psc == NULL && priv->driDisplay)
782	 psc = (*priv->driDisplay->createScreen) (i, priv);
783      if (psc == NULL && priv->driswDisplay)
784	 psc = (*priv->driswDisplay->createScreen) (i, priv);
785#endif
786#if defined(GLX_USE_APPLEGL)
787      if (psc == NULL)
788         psc = applegl_create_screen(i, priv);
789#else
790      if (psc == NULL)
791	 psc = indirect_create_screen(i, priv);
792#endif
793      priv->screens[i] = psc;
794   }
795   SyncHandle();
796   return GL_TRUE;
797}
798
799/*
800** Initialize the client side extension code.
801*/
802 _X_HIDDEN struct glx_display *
803__glXInitialize(Display * dpy)
804{
805   struct glx_display *dpyPriv, *d;
806#if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
807   Bool glx_direct, glx_accel;
808#endif
809   int i;
810
811   _XLockMutex(_Xglobal_lock);
812
813   for (dpyPriv = glx_displays; dpyPriv; dpyPriv = dpyPriv->next) {
814      if (dpyPriv->dpy == dpy) {
815	 _XUnlockMutex(_Xglobal_lock);
816	 return dpyPriv;
817      }
818   }
819
820   /* Drop the lock while we create the display private. */
821   _XUnlockMutex(_Xglobal_lock);
822
823   dpyPriv = Xcalloc(1, sizeof *dpyPriv);
824   if (!dpyPriv)
825      return NULL;
826
827   dpyPriv->codes = XInitExtension(dpy, __glXExtensionName);
828   if (!dpyPriv->codes) {
829      Xfree(dpyPriv);
830      _XUnlockMutex(_Xglobal_lock);
831      return NULL;
832   }
833
834   dpyPriv->dpy = dpy;
835   dpyPriv->majorOpcode = dpyPriv->codes->major_opcode;
836   dpyPriv->serverGLXvendor = 0x0;
837   dpyPriv->serverGLXversion = 0x0;
838
839   /* See if the versions are compatible */
840   if (!QueryVersion(dpy, dpyPriv->majorOpcode,
841		     &dpyPriv->majorVersion, &dpyPriv->minorVersion)) {
842      Xfree(dpyPriv);
843      _XUnlockMutex(_Xglobal_lock);
844      return NULL;
845   }
846
847   for (i = 0; i < __GLX_NUMBER_EVENTS; i++) {
848      XESetWireToEvent(dpy, dpyPriv->codes->first_event + i, __glXWireToEvent);
849      XESetEventToWire(dpy, dpyPriv->codes->first_event + i, __glXEventToWire);
850   }
851
852   XESetCloseDisplay(dpy, dpyPriv->codes->extension, __glXCloseDisplay);
853   XESetErrorString (dpy, dpyPriv->codes->extension,__glXErrorString);
854
855   dpyPriv->glXDrawHash = __glxHashCreate();
856
857#if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
858   glx_direct = (getenv("LIBGL_ALWAYS_INDIRECT") == NULL);
859   glx_accel = (getenv("LIBGL_ALWAYS_SOFTWARE") == NULL);
860
861   dpyPriv->drawHash = __glxHashCreate();
862
863   /*
864    ** Initialize the direct rendering per display data and functions.
865    ** Note: This _must_ be done before calling any other DRI routines
866    ** (e.g., those called in AllocAndFetchScreenConfigs).
867    */
868   if (glx_direct && glx_accel) {
869      dpyPriv->dri2Display = dri2CreateDisplay(dpy);
870      dpyPriv->driDisplay = driCreateDisplay(dpy);
871   }
872   if (glx_direct)
873      dpyPriv->driswDisplay = driswCreateDisplay(dpy);
874#endif
875
876#ifdef GLX_USE_APPLEGL
877   if (!applegl_create_display(dpyPriv)) {
878      Xfree(dpyPriv);
879      return NULL;
880   }
881#endif
882   if (!AllocAndFetchScreenConfigs(dpy, dpyPriv)) {
883      Xfree(dpyPriv);
884      return NULL;
885   }
886
887   if (dpyPriv->majorVersion == 1 && dpyPriv->minorVersion >= 1)
888      __glXClientInfo(dpy, dpyPriv->majorOpcode);
889
890   /* Grab the lock again and add the dispay private, unless somebody
891    * beat us to initializing on this display in the meantime. */
892   _XLockMutex(_Xglobal_lock);
893
894   for (d = glx_displays; d; d = d->next) {
895      if (d->dpy == dpy) {
896	 _XUnlockMutex(_Xglobal_lock);
897	 glx_display_free(dpyPriv);
898	 return d;
899      }
900   }
901
902   dpyPriv->next = glx_displays;
903   glx_displays = dpyPriv;
904
905    _XUnlockMutex(_Xglobal_lock);
906
907   return dpyPriv;
908}
909
910/*
911** Setup for sending a GLX command on dpy.  Make sure the extension is
912** initialized.  Try to avoid calling __glXInitialize as its kinda slow.
913*/
914_X_HIDDEN CARD8
915__glXSetupForCommand(Display * dpy)
916{
917    struct glx_context *gc;
918    struct glx_display *priv;
919
920   /* If this thread has a current context, flush its rendering commands */
921   gc = __glXGetCurrentContext();
922   if (gc->currentDpy) {
923      /* Flush rendering buffer of the current context, if any */
924      (void) __glXFlushRenderBuffer(gc, gc->pc);
925
926      if (gc->currentDpy == dpy) {
927         /* Use opcode from gc because its right */
928         return gc->majorOpcode;
929      }
930      else {
931         /*
932          ** Have to get info about argument dpy because it might be to
933          ** a different server
934          */
935      }
936   }
937
938   /* Forced to lookup extension via the slow initialize route */
939   priv = __glXInitialize(dpy);
940   if (!priv) {
941      return 0;
942   }
943   return priv->majorOpcode;
944}
945
946/**
947 * Flush the drawing command transport buffer.
948 *
949 * \param ctx  Context whose transport buffer is to be flushed.
950 * \param pc   Pointer to first unused buffer location.
951 *
952 * \todo
953 * Modify this function to use \c ctx->pc instead of the explicit
954 * \c pc parameter.
955 */
956_X_HIDDEN GLubyte *
957__glXFlushRenderBuffer(struct glx_context * ctx, GLubyte * pc)
958{
959   Display *const dpy = ctx->currentDpy;
960#ifdef USE_XCB
961   xcb_connection_t *c = XGetXCBConnection(dpy);
962#else
963   xGLXRenderReq *req;
964#endif /* USE_XCB */
965   const GLint size = pc - ctx->buf;
966
967   if ((dpy != NULL) && (size > 0)) {
968#ifdef USE_XCB
969      xcb_glx_render(c, ctx->currentContextTag, size,
970                     (const uint8_t *) ctx->buf);
971#else
972      /* Send the entire buffer as an X request */
973      LockDisplay(dpy);
974      GetReq(GLXRender, req);
975      req->reqType = ctx->majorOpcode;
976      req->glxCode = X_GLXRender;
977      req->contextTag = ctx->currentContextTag;
978      req->length += (size + 3) >> 2;
979      _XSend(dpy, (char *) ctx->buf, size);
980      UnlockDisplay(dpy);
981      SyncHandle();
982#endif
983   }
984
985   /* Reset pointer and return it */
986   ctx->pc = ctx->buf;
987   return ctx->pc;
988}
989
990
991/**
992 * Send a portion of a GLXRenderLarge command to the server.  The advantage of
993 * this function over \c __glXSendLargeCommand is that callers can use the
994 * data buffer in the GLX context and may be able to avoid allocating an
995 * extra buffer.  The disadvantage is the clients will have to do more
996 * GLX protocol work (i.e., calculating \c totalRequests, etc.).
997 *
998 * \sa __glXSendLargeCommand
999 *
1000 * \param gc             GLX context
1001 * \param requestNumber  Which part of the whole command is this?  The first
1002 *                       request is 1.
1003 * \param totalRequests  How many requests will there be?
1004 * \param data           Command data.
1005 * \param dataLen        Size, in bytes, of the command data.
1006 */
1007_X_HIDDEN void
1008__glXSendLargeChunk(struct glx_context * gc, GLint requestNumber,
1009                    GLint totalRequests, const GLvoid * data, GLint dataLen)
1010{
1011   Display *dpy = gc->currentDpy;
1012#ifdef USE_XCB
1013   xcb_connection_t *c = XGetXCBConnection(dpy);
1014   xcb_glx_render_large(c, gc->currentContextTag, requestNumber,
1015                        totalRequests, dataLen, data);
1016#else
1017   xGLXRenderLargeReq *req;
1018
1019   if (requestNumber == 1) {
1020      LockDisplay(dpy);
1021   }
1022
1023   GetReq(GLXRenderLarge, req);
1024   req->reqType = gc->majorOpcode;
1025   req->glxCode = X_GLXRenderLarge;
1026   req->contextTag = gc->currentContextTag;
1027   req->length += (dataLen + 3) >> 2;
1028   req->requestNumber = requestNumber;
1029   req->requestTotal = totalRequests;
1030   req->dataBytes = dataLen;
1031   Data(dpy, data, dataLen);
1032
1033   if (requestNumber == totalRequests) {
1034      UnlockDisplay(dpy);
1035      SyncHandle();
1036   }
1037#endif /* USE_XCB */
1038}
1039
1040
1041/**
1042 * Send a command that is too large for the GLXRender protocol request.
1043 *
1044 * Send a large command, one that is too large for some reason to
1045 * send using the GLXRender protocol request.  One reason to send
1046 * a large command is to avoid copying the data.
1047 *
1048 * \param ctx        GLX context
1049 * \param header     Header data.
1050 * \param headerLen  Size, in bytes, of the header data.  It is assumed that
1051 *                   the header data will always be small enough to fit in
1052 *                   a single X protocol packet.
1053 * \param data       Command data.
1054 * \param dataLen    Size, in bytes, of the command data.
1055 */
1056_X_HIDDEN void
1057__glXSendLargeCommand(struct glx_context * ctx,
1058                      const GLvoid * header, GLint headerLen,
1059                      const GLvoid * data, GLint dataLen)
1060{
1061   GLint maxSize;
1062   GLint totalRequests, requestNumber;
1063
1064   /*
1065    ** Calculate the maximum amount of data can be stuffed into a single
1066    ** packet.  sz_xGLXRenderReq is added because bufSize is the maximum
1067    ** packet size minus sz_xGLXRenderReq.
1068    */
1069   maxSize = (ctx->bufSize + sz_xGLXRenderReq) - sz_xGLXRenderLargeReq;
1070   totalRequests = 1 + (dataLen / maxSize);
1071   if (dataLen % maxSize)
1072      totalRequests++;
1073
1074   /*
1075    ** Send all of the command, except the large array, as one request.
1076    */
1077   assert(headerLen <= maxSize);
1078   __glXSendLargeChunk(ctx, 1, totalRequests, header, headerLen);
1079
1080   /*
1081    ** Send enough requests until the whole array is sent.
1082    */
1083   for (requestNumber = 2; requestNumber <= (totalRequests - 1);
1084        requestNumber++) {
1085      __glXSendLargeChunk(ctx, requestNumber, totalRequests, data, maxSize);
1086      data = (const GLvoid *) (((const GLubyte *) data) + maxSize);
1087      dataLen -= maxSize;
1088      assert(dataLen > 0);
1089   }
1090
1091   assert(dataLen <= maxSize);
1092   __glXSendLargeChunk(ctx, requestNumber, totalRequests, data, dataLen);
1093}
1094
1095/************************************************************************/
1096
1097#ifdef DEBUG
1098_X_HIDDEN void
1099__glXDumpDrawBuffer(struct glx_context * ctx)
1100{
1101   GLubyte *p = ctx->buf;
1102   GLubyte *end = ctx->pc;
1103   GLushort opcode, length;
1104
1105   while (p < end) {
1106      /* Fetch opcode */
1107      opcode = *((GLushort *) p);
1108      length = *((GLushort *) (p + 2));
1109      printf("%2x: %5d: ", opcode, length);
1110      length -= 4;
1111      p += 4;
1112      while (length > 0) {
1113         printf("%08x ", *((unsigned *) p));
1114         p += 4;
1115         length -= 4;
1116      }
1117      printf("\n");
1118   }
1119}
1120#endif
1121