glxext.c revision f84d8fab99e10b5575c0f4f93b67846fc1ebad13 
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      xGLXBufferSwapComplete *awire = (xGLXBufferSwapComplete *)wire;
137      aevent->event_type = awire->event_type;
138      aevent->drawable = awire->drawable;
139      aevent->ust = ((CARD64)awire->ust_hi << 32) | awire->ust_lo;
140      aevent->msc = ((CARD64)awire->msc_hi << 32) | awire->msc_lo;
141      aevent->sbc = ((CARD64)awire->sbc_hi << 32) | awire->sbc_lo;
142      return True;
143   }
144   default:
145      /* client doesn't support server event */
146      break;
147   }
148
149   return False;
150}
151
152/* We don't actually support this.  It doesn't make sense for clients to
153 * send each other GLX events.
154 */
155static Status
156__glXEventToWire(Display *dpy, XEvent *event, xEvent *wire)
157{
158     struct glx_display *glx_dpy = __glXInitialize(dpy);
159
160   if (glx_dpy == NULL)
161      return False;
162
163   switch (event->type) {
164   case GLX_DAMAGED:
165      break;
166   case GLX_SAVED:
167      break;
168   case GLX_EXCHANGE_COMPLETE_INTEL:
169      break;
170   case GLX_COPY_COMPLETE_INTEL:
171      break;
172   case GLX_FLIP_COMPLETE_INTEL:
173      break;
174   default:
175      /* client doesn't support server event */
176      break;
177   }
178
179   return Success;
180}
181
182/************************************************************************/
183/*
184** Free the per screen configs data as well as the array of
185** __glXScreenConfigs.
186*/
187static void
188FreeScreenConfigs(struct glx_display * priv)
189{
190   struct glx_screen *psc;
191   GLint i, screens;
192
193   /* Free screen configuration information */
194   screens = ScreenCount(priv->dpy);
195   for (i = 0; i < screens; i++) {
196      psc = priv->screens[i];
197      if (psc->configs) {
198	 glx_config_destroy_list(psc->configs);
199         if (psc->effectiveGLXexts)
200            Xfree(psc->effectiveGLXexts);
201         psc->configs = NULL;   /* NOTE: just for paranoia */
202      }
203      if (psc->visuals) {
204	 glx_config_destroy_list(psc->visuals);
205	 psc->visuals = NULL;   /* NOTE: just for paranoia */
206      }
207      Xfree((char *) psc->serverGLXexts);
208
209#if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
210      if (psc->driScreen) {
211         psc->driScreen->destroyScreen(psc);
212      } else {
213	 Xfree(psc);
214      }
215#else
216      Xfree(psc);
217#endif
218   }
219   XFree((char *) priv->screens);
220   priv->screens = NULL;
221}
222
223static void
224glx_display_free(struct glx_display *priv)
225{
226   struct glx_context *gc;
227
228   gc = __glXGetCurrentContext();
229   if (priv->dpy == gc->currentDpy) {
230      gc->vtable->destroy(gc);
231      __glXSetCurrentContextNull();
232   }
233
234   FreeScreenConfigs(priv);
235   if (priv->serverGLXvendor)
236      Xfree((char *) priv->serverGLXvendor);
237   if (priv->serverGLXversion)
238      Xfree((char *) priv->serverGLXversion);
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_USE_GL:
560         if (fbconfig_style_tags)
561            bp++;
562         break;
563      case None:
564         i = count;
565         break;
566      default:
567         if(getenv("LIBGL_DIAGNOSTIC")) {
568             long int tagvalue = *bp++;
569             fprintf(stderr, "WARNING: unknown GLX tag from server: "
570                     "tag 0x%lx value 0x%lx\n", tag, tagvalue);
571         } else {
572             /* Ignore the unrecognized tag's value */
573             bp++;
574         }
575         break;
576      }
577   }
578
579   config->renderType =
580      (config->rgbMode) ? GLX_RGBA_BIT : GLX_COLOR_INDEX_BIT;
581}
582
583static struct glx_config *
584createConfigsFromProperties(Display * dpy, int nvisuals, int nprops,
585                            int screen, GLboolean tagged_only)
586{
587   INT32 buf[__GLX_TOTAL_CONFIG], *props;
588   unsigned prop_size;
589   struct glx_config *modes, *m;
590   int i;
591
592   if (nprops == 0)
593      return NULL;
594
595   /* FIXME: Is the __GLX_MIN_CONFIG_PROPS test correct for FBconfigs? */
596
597   /* Check number of properties */
598   if (nprops < __GLX_MIN_CONFIG_PROPS || nprops > __GLX_MAX_CONFIG_PROPS)
599      return NULL;
600
601   /* Allocate memory for our config structure */
602   modes = glx_config_create_list(nvisuals);
603   if (!modes)
604      return NULL;
605
606   prop_size = nprops * __GLX_SIZE_INT32;
607   if (prop_size <= sizeof(buf))
608      props = buf;
609   else
610      props = Xmalloc(prop_size);
611
612   /* Read each config structure and convert it into our format */
613   m = modes;
614   for (i = 0; i < nvisuals; i++) {
615      _XRead(dpy, (char *) props, prop_size);
616#ifdef GLX_USE_APPLEGL
617       /* Older X servers don't send this so we default it here. */
618      m->drawableType = GLX_WINDOW_BIT;
619#else
620      /*
621       * The XQuartz 2.3.2.1 X server doesn't set this properly, so
622       * set the proper bits here.
623       * AppleSGLX supports windows, pixmaps, and pbuffers with all config.
624       */
625      m->drawableType = GLX_WINDOW_BIT | GLX_PIXMAP_BIT | GLX_PBUFFER_BIT;
626#endif
627       __glXInitializeVisualConfigFromTags(m, nprops, props,
628                                          tagged_only, GL_TRUE);
629      m->screen = screen;
630      m = m->next;
631   }
632
633   if (props != buf)
634      Xfree(props);
635
636   return modes;
637}
638
639static GLboolean
640getVisualConfigs(struct glx_screen *psc,
641		  struct glx_display *priv, int screen)
642{
643   xGLXGetVisualConfigsReq *req;
644   xGLXGetVisualConfigsReply reply;
645   Display *dpy = priv->dpy;
646
647   LockDisplay(dpy);
648
649   psc->visuals = NULL;
650   GetReq(GLXGetVisualConfigs, req);
651   req->reqType = priv->majorOpcode;
652   req->glxCode = X_GLXGetVisualConfigs;
653   req->screen = screen;
654
655   if (!_XReply(dpy, (xReply *) & reply, 0, False))
656      goto out;
657
658   psc->visuals = createConfigsFromProperties(dpy,
659                                              reply.numVisuals,
660                                              reply.numProps,
661                                              screen, GL_FALSE);
662
663 out:
664   UnlockDisplay(dpy);
665   return psc->visuals != NULL;
666}
667
668static GLboolean
669 getFBConfigs(struct glx_screen *psc, struct glx_display *priv, int screen)
670{
671   xGLXGetFBConfigsReq *fb_req;
672   xGLXGetFBConfigsSGIXReq *sgi_req;
673   xGLXVendorPrivateWithReplyReq *vpreq;
674   xGLXGetFBConfigsReply reply;
675   Display *dpy = priv->dpy;
676
677   psc->serverGLXexts =
678      __glXQueryServerString(dpy, priv->majorOpcode, screen, GLX_EXTENSIONS);
679
680   LockDisplay(dpy);
681
682   psc->configs = NULL;
683   if (atof(priv->serverGLXversion) >= 1.3) {
684      GetReq(GLXGetFBConfigs, fb_req);
685      fb_req->reqType = priv->majorOpcode;
686      fb_req->glxCode = X_GLXGetFBConfigs;
687      fb_req->screen = screen;
688   }
689   else if (strstr(psc->serverGLXexts, "GLX_SGIX_fbconfig") != NULL) {
690      GetReqExtra(GLXVendorPrivateWithReply,
691                  sz_xGLXGetFBConfigsSGIXReq +
692                  sz_xGLXVendorPrivateWithReplyReq, vpreq);
693      sgi_req = (xGLXGetFBConfigsSGIXReq *) vpreq;
694      sgi_req->reqType = priv->majorOpcode;
695      sgi_req->glxCode = X_GLXVendorPrivateWithReply;
696      sgi_req->vendorCode = X_GLXvop_GetFBConfigsSGIX;
697      sgi_req->screen = screen;
698   }
699   else
700      goto out;
701
702   if (!_XReply(dpy, (xReply *) & reply, 0, False))
703      goto out;
704
705   psc->configs = createConfigsFromProperties(dpy,
706                                              reply.numFBConfigs,
707                                              reply.numAttribs * 2,
708                                              screen, GL_TRUE);
709
710 out:
711   UnlockDisplay(dpy);
712   return psc->configs != NULL;
713}
714
715_X_HIDDEN Bool
716glx_screen_init(struct glx_screen *psc,
717		 int screen, struct glx_display * priv)
718{
719   /* Initialize per screen dynamic client GLX extensions */
720   psc->ext_list_first_time = GL_TRUE;
721   psc->scr = screen;
722   psc->dpy = priv->dpy;
723   psc->display = priv;
724
725   getVisualConfigs(psc, priv, screen);
726   getFBConfigs(psc, priv, screen);
727
728   return GL_TRUE;
729}
730
731/*
732** Allocate the memory for the per screen configs for each screen.
733** If that works then fetch the per screen configs data.
734*/
735static Bool
736AllocAndFetchScreenConfigs(Display * dpy, struct glx_display * priv)
737{
738   struct glx_screen *psc;
739   GLint i, screens;
740
741   /*
742    ** First allocate memory for the array of per screen configs.
743    */
744   screens = ScreenCount(dpy);
745   priv->screens = Xmalloc(screens * sizeof *priv->screens);
746   if (!priv->screens)
747      return GL_FALSE;
748
749   priv->serverGLXversion =
750      __glXQueryServerString(dpy, priv->majorOpcode, 0, GLX_VERSION);
751   if (priv->serverGLXversion == NULL) {
752      FreeScreenConfigs(priv);
753      return GL_FALSE;
754   }
755
756   for (i = 0; i < screens; i++, psc++) {
757      psc = NULL;
758#if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
759      if (priv->dri2Display)
760	 psc = (*priv->dri2Display->createScreen) (i, priv);
761      if (psc == NULL && priv->driDisplay)
762	 psc = (*priv->driDisplay->createScreen) (i, priv);
763      if (psc == NULL && priv->driswDisplay)
764	 psc = (*priv->driswDisplay->createScreen) (i, priv);
765#endif
766#if defined(GLX_USE_APPLEGL)
767      if (psc == NULL && priv->appleglDisplay)
768	 psc = (*priv->appleglDisplay->createScreen) (i, priv);
769#endif
770      if (psc == NULL)
771	 psc = indirect_create_screen(i, priv);
772      priv->screens[i] = psc;
773   }
774   SyncHandle();
775   return GL_TRUE;
776}
777
778/*
779** Initialize the client side extension code.
780*/
781 _X_HIDDEN struct glx_display *
782__glXInitialize(Display * dpy)
783{
784   struct glx_display *dpyPriv, *d;
785#if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
786   Bool glx_direct, glx_accel;
787#endif
788   int i;
789
790   _XLockMutex(_Xglobal_lock);
791
792   for (dpyPriv = glx_displays; dpyPriv; dpyPriv = dpyPriv->next) {
793      if (dpyPriv->dpy == dpy) {
794	 _XUnlockMutex(_Xglobal_lock);
795	 return dpyPriv;
796      }
797   }
798
799   /* Drop the lock while we create the display private. */
800   _XUnlockMutex(_Xglobal_lock);
801
802   dpyPriv = Xcalloc(1, sizeof *dpyPriv);
803   if (!dpyPriv)
804      return NULL;
805
806   dpyPriv->codes = XInitExtension(dpy, __glXExtensionName);
807   if (!dpyPriv->codes) {
808      Xfree(dpyPriv);
809      _XUnlockMutex(_Xglobal_lock);
810      return NULL;
811   }
812
813   dpyPriv->dpy = dpy;
814   dpyPriv->majorOpcode = dpyPriv->codes->major_opcode;
815   dpyPriv->serverGLXvendor = 0x0;
816   dpyPriv->serverGLXversion = 0x0;
817
818   /* See if the versions are compatible */
819   if (!QueryVersion(dpy, dpyPriv->majorOpcode,
820		     &dpyPriv->majorVersion, &dpyPriv->minorVersion)) {
821      Xfree(dpyPriv);
822      _XUnlockMutex(_Xglobal_lock);
823      return NULL;
824   }
825
826   for (i = 0; i < __GLX_NUMBER_EVENTS; i++) {
827      XESetWireToEvent(dpy, dpyPriv->codes->first_event + i, __glXWireToEvent);
828      XESetEventToWire(dpy, dpyPriv->codes->first_event + i, __glXEventToWire);
829   }
830
831   XESetCloseDisplay(dpy, dpyPriv->codes->extension, __glXCloseDisplay);
832   XESetErrorString (dpy, dpyPriv->codes->extension,__glXErrorString);
833
834#if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
835   glx_direct = (getenv("LIBGL_ALWAYS_INDIRECT") == NULL);
836   glx_accel = (getenv("LIBGL_ALWAYS_SOFTWARE") == NULL);
837
838   dpyPriv->drawHash = __glxHashCreate();
839
840   /*
841    ** Initialize the direct rendering per display data and functions.
842    ** Note: This _must_ be done before calling any other DRI routines
843    ** (e.g., those called in AllocAndFetchScreenConfigs).
844    */
845   if (glx_direct && glx_accel) {
846      dpyPriv->dri2Display = dri2CreateDisplay(dpy);
847      dpyPriv->driDisplay = driCreateDisplay(dpy);
848   }
849   if (glx_direct)
850      dpyPriv->driswDisplay = driswCreateDisplay(dpy);
851#endif
852
853#ifdef GLX_USE_APPLEGL
854   if (!applegl_create_display(dpyPriv)) {
855      Xfree(dpyPriv);
856      return NULL;
857   }
858#endif
859   if (!AllocAndFetchScreenConfigs(dpy, dpyPriv)) {
860      Xfree(dpyPriv);
861      return NULL;
862   }
863
864   if (dpyPriv->majorVersion == 1 && dpyPriv->minorVersion >= 1)
865      __glXClientInfo(dpy, dpyPriv->majorOpcode);
866
867   /* Grab the lock again and add the dispay private, unless somebody
868    * beat us to initializing on this display in the meantime. */
869   _XLockMutex(_Xglobal_lock);
870
871   for (d = glx_displays; d; d = d->next) {
872      if (d->dpy == dpy) {
873	 _XUnlockMutex(_Xglobal_lock);
874	 glx_display_free(dpyPriv);
875	 return d;
876      }
877   }
878
879   dpyPriv->next = glx_displays;
880   glx_displays = dpyPriv;
881
882    _XUnlockMutex(_Xglobal_lock);
883
884   return dpyPriv;
885}
886
887/*
888** Setup for sending a GLX command on dpy.  Make sure the extension is
889** initialized.  Try to avoid calling __glXInitialize as its kinda slow.
890*/
891_X_HIDDEN CARD8
892__glXSetupForCommand(Display * dpy)
893{
894    struct glx_context *gc;
895    struct glx_display *priv;
896
897   /* If this thread has a current context, flush its rendering commands */
898   gc = __glXGetCurrentContext();
899   if (gc->currentDpy) {
900      /* Flush rendering buffer of the current context, if any */
901      (void) __glXFlushRenderBuffer(gc, gc->pc);
902
903      if (gc->currentDpy == dpy) {
904         /* Use opcode from gc because its right */
905         return gc->majorOpcode;
906      }
907      else {
908         /*
909          ** Have to get info about argument dpy because it might be to
910          ** a different server
911          */
912      }
913   }
914
915   /* Forced to lookup extension via the slow initialize route */
916   priv = __glXInitialize(dpy);
917   if (!priv) {
918      return 0;
919   }
920   return priv->majorOpcode;
921}
922
923/**
924 * Flush the drawing command transport buffer.
925 *
926 * \param ctx  Context whose transport buffer is to be flushed.
927 * \param pc   Pointer to first unused buffer location.
928 *
929 * \todo
930 * Modify this function to use \c ctx->pc instead of the explicit
931 * \c pc parameter.
932 */
933_X_HIDDEN GLubyte *
934__glXFlushRenderBuffer(struct glx_context * ctx, GLubyte * pc)
935{
936   Display *const dpy = ctx->currentDpy;
937#ifdef USE_XCB
938   xcb_connection_t *c = XGetXCBConnection(dpy);
939#else
940   xGLXRenderReq *req;
941#endif /* USE_XCB */
942   const GLint size = pc - ctx->buf;
943
944   if ((dpy != NULL) && (size > 0)) {
945#ifdef USE_XCB
946      xcb_glx_render(c, ctx->currentContextTag, size,
947                     (const uint8_t *) ctx->buf);
948#else
949      /* Send the entire buffer as an X request */
950      LockDisplay(dpy);
951      GetReq(GLXRender, req);
952      req->reqType = ctx->majorOpcode;
953      req->glxCode = X_GLXRender;
954      req->contextTag = ctx->currentContextTag;
955      req->length += (size + 3) >> 2;
956      _XSend(dpy, (char *) ctx->buf, size);
957      UnlockDisplay(dpy);
958      SyncHandle();
959#endif
960   }
961
962   /* Reset pointer and return it */
963   ctx->pc = ctx->buf;
964   return ctx->pc;
965}
966
967
968/**
969 * Send a portion of a GLXRenderLarge command to the server.  The advantage of
970 * this function over \c __glXSendLargeCommand is that callers can use the
971 * data buffer in the GLX context and may be able to avoid allocating an
972 * extra buffer.  The disadvantage is the clients will have to do more
973 * GLX protocol work (i.e., calculating \c totalRequests, etc.).
974 *
975 * \sa __glXSendLargeCommand
976 *
977 * \param gc             GLX context
978 * \param requestNumber  Which part of the whole command is this?  The first
979 *                       request is 1.
980 * \param totalRequests  How many requests will there be?
981 * \param data           Command data.
982 * \param dataLen        Size, in bytes, of the command data.
983 */
984_X_HIDDEN void
985__glXSendLargeChunk(struct glx_context * gc, GLint requestNumber,
986                    GLint totalRequests, const GLvoid * data, GLint dataLen)
987{
988   Display *dpy = gc->currentDpy;
989#ifdef USE_XCB
990   xcb_connection_t *c = XGetXCBConnection(dpy);
991   xcb_glx_render_large(c, gc->currentContextTag, requestNumber,
992                        totalRequests, dataLen, data);
993#else
994   xGLXRenderLargeReq *req;
995
996   if (requestNumber == 1) {
997      LockDisplay(dpy);
998   }
999
1000   GetReq(GLXRenderLarge, req);
1001   req->reqType = gc->majorOpcode;
1002   req->glxCode = X_GLXRenderLarge;
1003   req->contextTag = gc->currentContextTag;
1004   req->length += (dataLen + 3) >> 2;
1005   req->requestNumber = requestNumber;
1006   req->requestTotal = totalRequests;
1007   req->dataBytes = dataLen;
1008   Data(dpy, data, dataLen);
1009
1010   if (requestNumber == totalRequests) {
1011      UnlockDisplay(dpy);
1012      SyncHandle();
1013   }
1014#endif /* USE_XCB */
1015}
1016
1017
1018/**
1019 * Send a command that is too large for the GLXRender protocol request.
1020 *
1021 * Send a large command, one that is too large for some reason to
1022 * send using the GLXRender protocol request.  One reason to send
1023 * a large command is to avoid copying the data.
1024 *
1025 * \param ctx        GLX context
1026 * \param header     Header data.
1027 * \param headerLen  Size, in bytes, of the header data.  It is assumed that
1028 *                   the header data will always be small enough to fit in
1029 *                   a single X protocol packet.
1030 * \param data       Command data.
1031 * \param dataLen    Size, in bytes, of the command data.
1032 */
1033_X_HIDDEN void
1034__glXSendLargeCommand(struct glx_context * ctx,
1035                      const GLvoid * header, GLint headerLen,
1036                      const GLvoid * data, GLint dataLen)
1037{
1038   GLint maxSize;
1039   GLint totalRequests, requestNumber;
1040
1041   /*
1042    ** Calculate the maximum amount of data can be stuffed into a single
1043    ** packet.  sz_xGLXRenderReq is added because bufSize is the maximum
1044    ** packet size minus sz_xGLXRenderReq.
1045    */
1046   maxSize = (ctx->bufSize + sz_xGLXRenderReq) - sz_xGLXRenderLargeReq;
1047   totalRequests = 1 + (dataLen / maxSize);
1048   if (dataLen % maxSize)
1049      totalRequests++;
1050
1051   /*
1052    ** Send all of the command, except the large array, as one request.
1053    */
1054   assert(headerLen <= maxSize);
1055   __glXSendLargeChunk(ctx, 1, totalRequests, header, headerLen);
1056
1057   /*
1058    ** Send enough requests until the whole array is sent.
1059    */
1060   for (requestNumber = 2; requestNumber <= (totalRequests - 1);
1061        requestNumber++) {
1062      __glXSendLargeChunk(ctx, requestNumber, totalRequests, data, maxSize);
1063      data = (const GLvoid *) (((const GLubyte *) data) + maxSize);
1064      dataLen -= maxSize;
1065      assert(dataLen > 0);
1066   }
1067
1068   assert(dataLen <= maxSize);
1069   __glXSendLargeChunk(ctx, requestNumber, totalRequests, data, dataLen);
1070}
1071
1072/************************************************************************/
1073
1074#ifdef DEBUG
1075_X_HIDDEN void
1076__glXDumpDrawBuffer(struct glx_context * ctx)
1077{
1078   GLubyte *p = ctx->buf;
1079   GLubyte *end = ctx->pc;
1080   GLushort opcode, length;
1081
1082   while (p < end) {
1083      /* Fetch opcode */
1084      opcode = *((GLushort *) p);
1085      length = *((GLushort *) (p + 2));
1086      printf("%2x: %5d: ", opcode, length);
1087      length -= 4;
1088      p += 4;
1089      while (length > 0) {
1090         printf("%08x ", *((unsigned *) p));
1091         p += 4;
1092         length -= 4;
1093      }
1094      printf("\n");
1095   }
1096}
1097#endif
1098