glxext.c revision ab434f6b7641a64d30725a9ac24929240362d466 
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#include <X11/extensions/dri2proto.h>
45#ifdef GLX_USE_APPLEGL
46#include "apple_glx.h"
47#include "apple_visual.h"
48#endif
49#include "glxextensions.h"
50#include "glcontextmodes.h"
51
52#ifdef USE_XCB
53#include <X11/Xlib-xcb.h>
54#include <xcb/xcb.h>
55#include <xcb/glx.h>
56#endif
57
58
59#ifdef DEBUG
60void __glXDumpDrawBuffer(__GLXcontext * ctx);
61#endif
62
63/*
64** You can set this cell to 1 to force the gl drawing stuff to be
65** one command per packet
66*/
67_X_HIDDEN int __glXDebug = 0;
68
69/* Extension required boiler plate */
70
71static const char __glXExtensionName[] = GLX_EXTENSION_NAME;
72static __GLXdisplayPrivate *glx_displays;
73
74static /* const */ char *error_list[] = {
75   "GLXBadContext",
76   "GLXBadContextState",
77   "GLXBadDrawable",
78   "GLXBadPixmap",
79   "GLXBadContextTag",
80   "GLXBadCurrentWindow",
81   "GLXBadRenderRequest",
82   "GLXBadLargeRequest",
83   "GLXUnsupportedPrivateRequest",
84   "GLXBadFBConfig",
85   "GLXBadPbuffer",
86   "GLXBadCurrentDrawable",
87   "GLXBadWindow",
88};
89
90#ifdef GLX_USE_APPLEGL
91static char *__glXErrorString(Display *dpy, int code, XExtCodes *codes,
92                              char *buf, int n);
93#endif
94
95static
96XEXT_GENERATE_ERROR_STRING(__glXErrorString, __glXExtensionName,
97                           __GLX_NUMBER_ERRORS, error_list)
98
99static int
100__glXCloseDisplay(Display * dpy, XExtCodes * codes);
101static Bool
102__glXWireToEvent(Display *dpy, XEvent *event, xEvent *wire);
103static Status
104__glXEventToWire(Display *dpy, XEvent *event, xEvent *wire);
105
106/*
107 * GLX events are a bit funky.  We don't stuff the X event code into
108 * our user exposed (via XNextEvent) structure.  Instead we use the GLX
109 * private event code namespace (and hope it doesn't conflict).  Clients
110 * have to know that bit 15 in the event type field means they're getting
111 * a GLX event, and then handle the various sub-event types there, rather
112 * than simply checking the event code and handling it directly.
113 */
114
115static Bool
116__glXWireToEvent(Display *dpy, XEvent *event, xEvent *wire)
117{
118   __GLXdisplayPrivate *glx_dpy = __glXInitialize(dpy);
119
120   if (glx_dpy == NULL)
121      return False;
122
123   switch ((wire->u.u.type & 0x7f) - glx_dpy->codes->first_event) {
124   case GLX_PbufferClobber:
125   {
126      GLXPbufferClobberEvent *aevent = (GLXPbufferClobberEvent *)event;
127      xGLXPbufferClobberEvent *awire = (xGLXPbufferClobberEvent *)wire;
128      aevent->event_type = awire->type;
129      aevent->serial = awire->sequenceNumber;
130      aevent->event_type = awire->event_type;
131      aevent->draw_type = awire->draw_type;
132      aevent->drawable = awire->drawable;
133      aevent->buffer_mask = awire->buffer_mask;
134      aevent->aux_buffer = awire->aux_buffer;
135      aevent->x = awire->x;
136      aevent->y = awire->y;
137      aevent->width = awire->width;
138      aevent->height = awire->height;
139      aevent->count = awire->count;
140      return True;
141   }
142   /* No easy symbol to test for this, as GLX_BufferSwapComplete is
143    * defined in the local glx.h header, but the
144    * xGLXBufferSwapComplete typedef is only available in new versions
145    * of the external glxproto.h header, which doesn't have any
146    * testable versioning define.
147    *
148    * I'll use the related DRI2 define, in the hope that we won't
149    * receive these events unless we know how to ask for them:
150    */
151#ifdef X_DRI2SwapBuffers
152   case GLX_BufferSwapComplete:
153   {
154      GLXBufferSwapComplete *aevent = (GLXBufferSwapComplete *)event;
155      xGLXBufferSwapComplete *awire = (xGLXBufferSwapComplete *)wire;
156      aevent->event_type = awire->event_type;
157      aevent->drawable = awire->drawable;
158      aevent->ust = ((CARD64)awire->ust_hi << 32) | awire->ust_lo;
159      aevent->msc = ((CARD64)awire->msc_hi << 32) | awire->msc_lo;
160      aevent->sbc = ((CARD64)awire->sbc_hi << 32) | awire->sbc_lo;
161      return True;
162   }
163#endif
164   default:
165      /* client doesn't support server event */
166      break;
167   }
168
169   return False;
170}
171
172/* We don't actually support this.  It doesn't make sense for clients to
173 * send each other GLX events.
174 */
175static Status
176__glXEventToWire(Display *dpy, XEvent *event, xEvent *wire)
177{
178   __GLXdisplayPrivate *glx_dpy = __glXInitialize(dpy);
179
180   if (glx_dpy == NULL)
181      return False;
182
183   switch (event->type) {
184   case GLX_DAMAGED:
185      break;
186   case GLX_SAVED:
187      break;
188   case GLX_EXCHANGE_COMPLETE_INTEL:
189      break;
190   case GLX_COPY_COMPLETE_INTEL:
191      break;
192   case GLX_FLIP_COMPLETE_INTEL:
193      break;
194   default:
195      /* client doesn't support server event */
196      break;
197   }
198
199   return Success;
200}
201
202/************************************************************************/
203/*
204** Free the per screen configs data as well as the array of
205** __glXScreenConfigs.
206*/
207static void
208FreeScreenConfigs(__GLXdisplayPrivate * priv)
209{
210   __GLXscreenConfigs *psc;
211   GLint i, screens;
212
213   /* Free screen configuration information */
214   screens = ScreenCount(priv->dpy);
215   for (i = 0; i < screens; i++) {
216      psc = priv->screenConfigs[i];
217      if (psc->configs) {
218         _gl_context_modes_destroy(psc->configs);
219         if (psc->effectiveGLXexts)
220            Xfree(psc->effectiveGLXexts);
221         psc->configs = NULL;   /* NOTE: just for paranoia */
222      }
223      if (psc->visuals) {
224         _gl_context_modes_destroy(psc->visuals);
225         psc->visuals = NULL;   /* NOTE: just for paranoia */
226      }
227      Xfree((char *) psc->serverGLXexts);
228
229#if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
230      if (psc->driScreen) {
231         psc->driScreen->destroyScreen(psc);
232         psc->driScreen = NULL;
233      } else {
234	 Xfree(psc);
235      }
236#else
237      Xfree(psc);
238#endif
239   }
240   XFree((char *) priv->screenConfigs);
241   priv->screenConfigs = NULL;
242}
243
244/*
245** Release the private memory referred to in a display private
246** structure.  The caller will free the extension structure.
247*/
248static int
249__glXCloseDisplay(Display * dpy, XExtCodes * codes)
250{
251   __GLXdisplayPrivate *priv, **prev;
252   GLXContext gc;
253
254   _XLockMutex(_Xglobal_lock);
255   prev = &glx_displays;
256   for (priv = glx_displays; priv; prev = &priv->next, priv = priv->next) {
257      if (priv->dpy == dpy) {
258	 (*prev)->next = priv->next;
259	 break;
260      }
261   }
262   _XUnlockMutex(_Xglobal_lock);
263
264   gc = __glXGetCurrentContext();
265   if (dpy == gc->currentDpy) {
266      __glXSetCurrentContextNull();
267      __glXFreeContext(gc);
268   }
269
270   FreeScreenConfigs(priv);
271   if (priv->serverGLXvendor)
272      Xfree((char *) priv->serverGLXvendor);
273   if (priv->serverGLXversion)
274      Xfree((char *) priv->serverGLXversion);
275
276   __glxHashDestroy(priv->drawHash);
277
278#if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
279   /* Free the direct rendering per display data */
280   if (priv->driswDisplay)
281      (*priv->driswDisplay->destroyDisplay) (priv->driswDisplay);
282   priv->driswDisplay = NULL;
283
284   if (priv->driDisplay)
285      (*priv->driDisplay->destroyDisplay) (priv->driDisplay);
286   priv->driDisplay = NULL;
287
288   if (priv->dri2Display)
289      (*priv->dri2Display->destroyDisplay) (priv->dri2Display);
290   priv->dri2Display = NULL;
291#endif
292
293   Xfree((char *) priv);
294
295   return 1;
296}
297
298/*
299** Query the version of the GLX extension.  This procedure works even if
300** the client extension is not completely set up.
301*/
302static Bool
303QueryVersion(Display * dpy, int opcode, int *major, int *minor)
304{
305#ifdef USE_XCB
306   xcb_connection_t *c = XGetXCBConnection(dpy);
307   xcb_glx_query_version_reply_t *reply = xcb_glx_query_version_reply(c,
308                                                                      xcb_glx_query_version
309                                                                      (c,
310                                                                       GLX_MAJOR_VERSION,
311                                                                       GLX_MINOR_VERSION),
312                                                                      NULL);
313
314   if (reply->major_version != GLX_MAJOR_VERSION) {
315      free(reply);
316      return GL_FALSE;
317   }
318   *major = reply->major_version;
319   *minor = min(reply->minor_version, GLX_MINOR_VERSION);
320   free(reply);
321   return GL_TRUE;
322#else
323   xGLXQueryVersionReq *req;
324   xGLXQueryVersionReply reply;
325
326   /* Send the glXQueryVersion request */
327   LockDisplay(dpy);
328   GetReq(GLXQueryVersion, req);
329   req->reqType = opcode;
330   req->glxCode = X_GLXQueryVersion;
331   req->majorVersion = GLX_MAJOR_VERSION;
332   req->minorVersion = GLX_MINOR_VERSION;
333   _XReply(dpy, (xReply *) & reply, 0, False);
334   UnlockDisplay(dpy);
335   SyncHandle();
336
337   if (reply.majorVersion != GLX_MAJOR_VERSION) {
338      /*
339       ** The server does not support the same major release as this
340       ** client.
341       */
342      return GL_FALSE;
343   }
344   *major = reply.majorVersion;
345   *minor = min(reply.minorVersion, GLX_MINOR_VERSION);
346   return GL_TRUE;
347#endif /* USE_XCB */
348}
349
350/*
351 * We don't want to enable this GLX_OML_swap_method in glxext.h,
352 * because we can't support it.  The X server writes it out though,
353 * so we should handle it somehow, to avoid false warnings.
354 */
355enum {
356    IGNORE_GLX_SWAP_METHOD_OML = 0x8060
357};
358
359
360/*
361 * getVisualConfigs uses the !tagged_only path.
362 * getFBConfigs uses the tagged_only path.
363 */
364_X_HIDDEN void
365__glXInitializeVisualConfigFromTags(__GLcontextModes * config, int count,
366                                    const INT32 * bp, Bool tagged_only,
367                                    Bool fbconfig_style_tags)
368{
369   int i;
370
371   if (!tagged_only) {
372      /* Copy in the first set of properties */
373      config->visualID = *bp++;
374
375      config->visualType = _gl_convert_from_x_visual_type(*bp++);
376
377      config->rgbMode = *bp++;
378
379      config->redBits = *bp++;
380      config->greenBits = *bp++;
381      config->blueBits = *bp++;
382      config->alphaBits = *bp++;
383      config->accumRedBits = *bp++;
384      config->accumGreenBits = *bp++;
385      config->accumBlueBits = *bp++;
386      config->accumAlphaBits = *bp++;
387
388      config->doubleBufferMode = *bp++;
389      config->stereoMode = *bp++;
390
391      config->rgbBits = *bp++;
392      config->depthBits = *bp++;
393      config->stencilBits = *bp++;
394      config->numAuxBuffers = *bp++;
395      config->level = *bp++;
396
397#ifdef GLX_USE_APPLEGL
398       /* AppleSGLX supports pixmap and pbuffers with all config. */
399       config->drawableType = GLX_WINDOW_BIT | GLX_PIXMAP_BIT | GLX_PBUFFER_BIT;
400       /* Unfortunately this can create an ABI compatibility problem. */
401       count -= 18;
402#else
403      count -= __GLX_MIN_CONFIG_PROPS;
404#endif
405   }
406
407   /*
408    ** Additional properties may be in a list at the end
409    ** of the reply.  They are in pairs of property type
410    ** and property value.
411    */
412
413#define FETCH_OR_SET(tag) \
414    config-> tag = ( fbconfig_style_tags ) ? *bp++ : 1
415
416   for (i = 0; i < count; i += 2) {
417      long int tag = *bp++;
418
419      switch (tag) {
420      case GLX_RGBA:
421         FETCH_OR_SET(rgbMode);
422         break;
423      case GLX_BUFFER_SIZE:
424         config->rgbBits = *bp++;
425         break;
426      case GLX_LEVEL:
427         config->level = *bp++;
428         break;
429      case GLX_DOUBLEBUFFER:
430         FETCH_OR_SET(doubleBufferMode);
431         break;
432      case GLX_STEREO:
433         FETCH_OR_SET(stereoMode);
434         break;
435      case GLX_AUX_BUFFERS:
436         config->numAuxBuffers = *bp++;
437         break;
438      case GLX_RED_SIZE:
439         config->redBits = *bp++;
440         break;
441      case GLX_GREEN_SIZE:
442         config->greenBits = *bp++;
443         break;
444      case GLX_BLUE_SIZE:
445         config->blueBits = *bp++;
446         break;
447      case GLX_ALPHA_SIZE:
448         config->alphaBits = *bp++;
449         break;
450      case GLX_DEPTH_SIZE:
451         config->depthBits = *bp++;
452         break;
453      case GLX_STENCIL_SIZE:
454         config->stencilBits = *bp++;
455         break;
456      case GLX_ACCUM_RED_SIZE:
457         config->accumRedBits = *bp++;
458         break;
459      case GLX_ACCUM_GREEN_SIZE:
460         config->accumGreenBits = *bp++;
461         break;
462      case GLX_ACCUM_BLUE_SIZE:
463         config->accumBlueBits = *bp++;
464         break;
465      case GLX_ACCUM_ALPHA_SIZE:
466         config->accumAlphaBits = *bp++;
467         break;
468      case GLX_VISUAL_CAVEAT_EXT:
469         config->visualRating = *bp++;
470         break;
471      case GLX_X_VISUAL_TYPE:
472         config->visualType = *bp++;
473         break;
474      case GLX_TRANSPARENT_TYPE:
475         config->transparentPixel = *bp++;
476         break;
477      case GLX_TRANSPARENT_INDEX_VALUE:
478         config->transparentIndex = *bp++;
479         break;
480      case GLX_TRANSPARENT_RED_VALUE:
481         config->transparentRed = *bp++;
482         break;
483      case GLX_TRANSPARENT_GREEN_VALUE:
484         config->transparentGreen = *bp++;
485         break;
486      case GLX_TRANSPARENT_BLUE_VALUE:
487         config->transparentBlue = *bp++;
488         break;
489      case GLX_TRANSPARENT_ALPHA_VALUE:
490         config->transparentAlpha = *bp++;
491         break;
492      case GLX_VISUAL_ID:
493         config->visualID = *bp++;
494         break;
495      case GLX_DRAWABLE_TYPE:
496         config->drawableType = *bp++;
497#ifdef GLX_USE_APPLEGL
498         /* AppleSGLX supports pixmap and pbuffers with all config. */
499         config->drawableType |= GLX_WINDOW_BIT | GLX_PIXMAP_BIT | GLX_PBUFFER_BIT;
500#endif
501         break;
502      case GLX_RENDER_TYPE:
503         config->renderType = *bp++;
504         break;
505      case GLX_X_RENDERABLE:
506         config->xRenderable = *bp++;
507         break;
508      case GLX_FBCONFIG_ID:
509         config->fbconfigID = *bp++;
510         break;
511      case GLX_MAX_PBUFFER_WIDTH:
512         config->maxPbufferWidth = *bp++;
513         break;
514      case GLX_MAX_PBUFFER_HEIGHT:
515         config->maxPbufferHeight = *bp++;
516         break;
517      case GLX_MAX_PBUFFER_PIXELS:
518         config->maxPbufferPixels = *bp++;
519         break;
520#ifndef GLX_USE_APPLEGL
521      case GLX_OPTIMAL_PBUFFER_WIDTH_SGIX:
522         config->optimalPbufferWidth = *bp++;
523         break;
524      case GLX_OPTIMAL_PBUFFER_HEIGHT_SGIX:
525         config->optimalPbufferHeight = *bp++;
526         break;
527      case GLX_VISUAL_SELECT_GROUP_SGIX:
528         config->visualSelectGroup = *bp++;
529         break;
530      case GLX_SWAP_METHOD_OML:
531         config->swapMethod = *bp++;
532         break;
533#endif
534      case GLX_SAMPLE_BUFFERS_SGIS:
535         config->sampleBuffers = *bp++;
536         break;
537      case GLX_SAMPLES_SGIS:
538         config->samples = *bp++;
539         break;
540#ifdef GLX_USE_APPLEGL
541      case IGNORE_GLX_SWAP_METHOD_OML:
542         /* We ignore this tag.  See the comment above this function. */
543         ++bp;
544         break;
545#else
546      case GLX_BIND_TO_TEXTURE_RGB_EXT:
547         config->bindToTextureRgb = *bp++;
548         break;
549      case GLX_BIND_TO_TEXTURE_RGBA_EXT:
550         config->bindToTextureRgba = *bp++;
551         break;
552      case GLX_BIND_TO_MIPMAP_TEXTURE_EXT:
553         config->bindToMipmapTexture = *bp++;
554         break;
555      case GLX_BIND_TO_TEXTURE_TARGETS_EXT:
556         config->bindToTextureTargets = *bp++;
557         break;
558      case GLX_Y_INVERTED_EXT:
559         config->yInverted = *bp++;
560         break;
561#endif
562      case GLX_USE_GL:
563         if (fbconfig_style_tags)
564            bp++;
565         break;
566      case None:
567         i = count;
568         break;
569      default:
570         if(getenv("LIBGL_DIAGNOSTIC")) {
571             long int tagvalue = *bp++;
572             fprintf(stderr, "WARNING: unknown GLX tag from server: "
573                     "tag 0x%lx value 0x%lx\n", tag, tagvalue);
574         } else {
575             /* Ignore the unrecognized tag's value */
576             bp++;
577         }
578         break;
579      }
580   }
581
582   config->renderType =
583      (config->rgbMode) ? GLX_RGBA_BIT : GLX_COLOR_INDEX_BIT;
584
585   config->haveAccumBuffer = ((config->accumRedBits +
586                               config->accumGreenBits +
587                               config->accumBlueBits +
588                               config->accumAlphaBits) > 0);
589   config->haveDepthBuffer = (config->depthBits > 0);
590   config->haveStencilBuffer = (config->stencilBits > 0);
591}
592
593static __GLcontextModes *
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   __GLcontextModes *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 = _gl_context_modes_create(nvisuals, sizeof(__GLcontextModes));
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(__GLXscreenConfigs *psc,
651		 __GLXdisplayPrivate *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
679getFBConfigs(__GLXscreenConfigs *psc, __GLXdisplayPrivate *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(__GLXscreenConfigs *psc,
727		int screen, __GLXdisplayPrivate * 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
741static __GLXscreenConfigs *
742createIndirectScreen()
743{
744   __GLXscreenConfigs *psc;
745
746   psc = Xmalloc(sizeof *psc);
747   memset(psc, 0, sizeof *psc);
748
749   return psc;
750}
751
752/*
753** Allocate the memory for the per screen configs for each screen.
754** If that works then fetch the per screen configs data.
755*/
756static Bool
757AllocAndFetchScreenConfigs(Display * dpy, __GLXdisplayPrivate * priv)
758{
759   __GLXscreenConfigs *psc;
760   GLint i, screens;
761
762   /*
763    ** First allocate memory for the array of per screen configs.
764    */
765   screens = ScreenCount(dpy);
766   priv->screenConfigs = Xmalloc(screens * sizeof *priv->screenConfigs);
767   if (!priv->screenConfigs)
768      return GL_FALSE;
769
770   priv->serverGLXversion =
771      __glXQueryServerString(dpy, priv->majorOpcode, 0, GLX_VERSION);
772   if (priv->serverGLXversion == NULL) {
773      FreeScreenConfigs(priv);
774      return GL_FALSE;
775   }
776
777   for (i = 0; i < screens; i++, psc++) {
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      if (psc == NULL)
786	 psc = createIndirectScreen (i, priv);
787#endif
788      priv->screenConfigs[i] = psc;
789   }
790   SyncHandle();
791   return GL_TRUE;
792}
793
794/*
795** Initialize the client side extension code.
796*/
797_X_HIDDEN __GLXdisplayPrivate *
798__glXInitialize(Display * dpy)
799{
800   __GLXdisplayPrivate *dpyPriv;
801#if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
802   Bool glx_direct, glx_accel;
803#endif
804   int i;
805
806   _XLockMutex(_Xglobal_lock);
807
808   for (dpyPriv = glx_displays; dpyPriv; dpyPriv = dpyPriv->next) {
809      if (dpyPriv->dpy == dpy) {
810	 _XUnlockMutex(_Xglobal_lock);
811	 return dpyPriv;
812      }
813   }
814
815   dpyPriv = Xcalloc(1, sizeof *dpyPriv);
816   if (!dpyPriv)
817      return NULL;
818
819   dpyPriv->codes = XInitExtension(dpy, __glXExtensionName);
820   if (!dpyPriv->codes) {
821      Xfree(dpyPriv);
822      _XUnlockMutex(_Xglobal_lock);
823      return NULL;
824   }
825
826   dpyPriv->dpy = dpy;
827   dpyPriv->majorOpcode = dpyPriv->codes->major_opcode;
828   dpyPriv->serverGLXvendor = 0x0;
829   dpyPriv->serverGLXversion = 0x0;
830
831   /* See if the versions are compatible */
832   if (!QueryVersion(dpy, dpyPriv->majorOpcode,
833		     &dpyPriv->majorVersion, &dpyPriv->minorVersion)) {
834      Xfree(dpyPriv);
835      _XUnlockMutex(_Xglobal_lock);
836      return NULL;
837   }
838
839   for (i = 0; i < __GLX_NUMBER_EVENTS; i++) {
840      XESetWireToEvent(dpy, dpyPriv->codes->first_event + i, __glXWireToEvent);
841      XESetEventToWire(dpy, dpyPriv->codes->first_event + i, __glXEventToWire);
842   }
843
844   XESetCloseDisplay(dpy, dpyPriv->codes->extension, __glXCloseDisplay);
845   XESetErrorString (dpy, dpyPriv->codes->extension,__glXErrorString);
846
847#if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
848   glx_direct = (getenv("LIBGL_ALWAYS_INDIRECT") == NULL);
849   glx_accel = (getenv("LIBGL_ALWAYS_SOFTWARE") == NULL);
850
851   dpyPriv->drawHash = __glxHashCreate();
852
853   /*
854    ** Initialize the direct rendering per display data and functions.
855    ** Note: This _must_ be done before calling any other DRI routines
856    ** (e.g., those called in AllocAndFetchScreenConfigs).
857    */
858   if (glx_direct && glx_accel) {
859      dpyPriv->dri2Display = dri2CreateDisplay(dpy);
860      dpyPriv->driDisplay = driCreateDisplay(dpy);
861   }
862   if (glx_direct)
863      dpyPriv->driswDisplay = driswCreateDisplay(dpy);
864#endif
865
866#ifdef GLX_USE_APPLEGL
867   if (apple_init_glx(dpy)) {
868      Xfree(dpyPriv);
869      return NULL;
870   }
871#endif
872   if (!AllocAndFetchScreenConfigs(dpy, dpyPriv)) {
873      Xfree(dpyPriv);
874      return NULL;
875   }
876
877   if (dpyPriv->majorVersion == 1 && dpyPriv->minorVersion >= 1)
878      __glXClientInfo(dpy, dpyPriv->majorOpcode);
879
880   dpyPriv->next = glx_displays;
881   glx_displays = dpyPriv;
882
883    _XUnlockMutex(_Xglobal_lock);
884
885   return dpyPriv;
886}
887
888/*
889** Setup for sending a GLX command on dpy.  Make sure the extension is
890** initialized.  Try to avoid calling __glXInitialize as its kinda slow.
891*/
892_X_HIDDEN CARD8
893__glXSetupForCommand(Display * dpy)
894{
895   GLXContext gc;
896   __GLXdisplayPrivate *priv;
897
898   /* If this thread has a current context, flush its rendering commands */
899   gc = __glXGetCurrentContext();
900   if (gc->currentDpy) {
901      /* Flush rendering buffer of the current context, if any */
902      (void) __glXFlushRenderBuffer(gc, gc->pc);
903
904      if (gc->currentDpy == dpy) {
905         /* Use opcode from gc because its right */
906         return gc->majorOpcode;
907      }
908      else {
909         /*
910          ** Have to get info about argument dpy because it might be to
911          ** a different server
912          */
913      }
914   }
915
916   /* Forced to lookup extension via the slow initialize route */
917   priv = __glXInitialize(dpy);
918   if (!priv) {
919      return 0;
920   }
921   return priv->majorOpcode;
922}
923
924/**
925 * Flush the drawing command transport buffer.
926 *
927 * \param ctx  Context whose transport buffer is to be flushed.
928 * \param pc   Pointer to first unused buffer location.
929 *
930 * \todo
931 * Modify this function to use \c ctx->pc instead of the explicit
932 * \c pc parameter.
933 */
934_X_HIDDEN GLubyte *
935__glXFlushRenderBuffer(__GLXcontext * ctx, GLubyte * pc)
936{
937   Display *const dpy = ctx->currentDpy;
938#ifdef USE_XCB
939   xcb_connection_t *c = XGetXCBConnection(dpy);
940#else
941   xGLXRenderReq *req;
942#endif /* USE_XCB */
943   const GLint size = pc - ctx->buf;
944
945   if ((dpy != NULL) && (size > 0)) {
946#ifdef USE_XCB
947      xcb_glx_render(c, ctx->currentContextTag, size,
948                     (const uint8_t *) ctx->buf);
949#else
950      /* Send the entire buffer as an X request */
951      LockDisplay(dpy);
952      GetReq(GLXRender, req);
953      req->reqType = ctx->majorOpcode;
954      req->glxCode = X_GLXRender;
955      req->contextTag = ctx->currentContextTag;
956      req->length += (size + 3) >> 2;
957      _XSend(dpy, (char *) ctx->buf, size);
958      UnlockDisplay(dpy);
959      SyncHandle();
960#endif
961   }
962
963   /* Reset pointer and return it */
964   ctx->pc = ctx->buf;
965   return ctx->pc;
966}
967
968
969/**
970 * Send a portion of a GLXRenderLarge command to the server.  The advantage of
971 * this function over \c __glXSendLargeCommand is that callers can use the
972 * data buffer in the GLX context and may be able to avoid allocating an
973 * extra buffer.  The disadvantage is the clients will have to do more
974 * GLX protocol work (i.e., calculating \c totalRequests, etc.).
975 *
976 * \sa __glXSendLargeCommand
977 *
978 * \param gc             GLX context
979 * \param requestNumber  Which part of the whole command is this?  The first
980 *                       request is 1.
981 * \param totalRequests  How many requests will there be?
982 * \param data           Command data.
983 * \param dataLen        Size, in bytes, of the command data.
984 */
985_X_HIDDEN void
986__glXSendLargeChunk(__GLXcontext * gc, GLint requestNumber,
987                    GLint totalRequests, const GLvoid * data, GLint dataLen)
988{
989   Display *dpy = gc->currentDpy;
990#ifdef USE_XCB
991   xcb_connection_t *c = XGetXCBConnection(dpy);
992   xcb_glx_render_large(c, gc->currentContextTag, requestNumber,
993                        totalRequests, dataLen, data);
994#else
995   xGLXRenderLargeReq *req;
996
997   if (requestNumber == 1) {
998      LockDisplay(dpy);
999   }
1000
1001   GetReq(GLXRenderLarge, req);
1002   req->reqType = gc->majorOpcode;
1003   req->glxCode = X_GLXRenderLarge;
1004   req->contextTag = gc->currentContextTag;
1005   req->length += (dataLen + 3) >> 2;
1006   req->requestNumber = requestNumber;
1007   req->requestTotal = totalRequests;
1008   req->dataBytes = dataLen;
1009   Data(dpy, data, dataLen);
1010
1011   if (requestNumber == totalRequests) {
1012      UnlockDisplay(dpy);
1013      SyncHandle();
1014   }
1015#endif /* USE_XCB */
1016}
1017
1018
1019/**
1020 * Send a command that is too large for the GLXRender protocol request.
1021 *
1022 * Send a large command, one that is too large for some reason to
1023 * send using the GLXRender protocol request.  One reason to send
1024 * a large command is to avoid copying the data.
1025 *
1026 * \param ctx        GLX context
1027 * \param header     Header data.
1028 * \param headerLen  Size, in bytes, of the header data.  It is assumed that
1029 *                   the header data will always be small enough to fit in
1030 *                   a single X protocol packet.
1031 * \param data       Command data.
1032 * \param dataLen    Size, in bytes, of the command data.
1033 */
1034_X_HIDDEN void
1035__glXSendLargeCommand(__GLXcontext * ctx,
1036                      const GLvoid * header, GLint headerLen,
1037                      const GLvoid * data, GLint dataLen)
1038{
1039   GLint maxSize;
1040   GLint totalRequests, requestNumber;
1041
1042   /*
1043    ** Calculate the maximum amount of data can be stuffed into a single
1044    ** packet.  sz_xGLXRenderReq is added because bufSize is the maximum
1045    ** packet size minus sz_xGLXRenderReq.
1046    */
1047   maxSize = (ctx->bufSize + sz_xGLXRenderReq) - sz_xGLXRenderLargeReq;
1048   totalRequests = 1 + (dataLen / maxSize);
1049   if (dataLen % maxSize)
1050      totalRequests++;
1051
1052   /*
1053    ** Send all of the command, except the large array, as one request.
1054    */
1055   assert(headerLen <= maxSize);
1056   __glXSendLargeChunk(ctx, 1, totalRequests, header, headerLen);
1057
1058   /*
1059    ** Send enough requests until the whole array is sent.
1060    */
1061   for (requestNumber = 2; requestNumber <= (totalRequests - 1);
1062        requestNumber++) {
1063      __glXSendLargeChunk(ctx, requestNumber, totalRequests, data, maxSize);
1064      data = (const GLvoid *) (((const GLubyte *) data) + maxSize);
1065      dataLen -= maxSize;
1066      assert(dataLen > 0);
1067   }
1068
1069   assert(dataLen <= maxSize);
1070   __glXSendLargeChunk(ctx, requestNumber, totalRequests, data, dataLen);
1071}
1072
1073/************************************************************************/
1074
1075#ifdef DEBUG
1076_X_HIDDEN void
1077__glXDumpDrawBuffer(__GLXcontext * ctx)
1078{
1079   GLubyte *p = ctx->buf;
1080   GLubyte *end = ctx->pc;
1081   GLushort opcode, length;
1082
1083   while (p < end) {
1084      /* Fetch opcode */
1085      opcode = *((GLushort *) p);
1086      length = *((GLushort *) (p + 2));
1087      printf("%2x: %5d: ", opcode, length);
1088      length -= 4;
1089      p += 4;
1090      while (length > 0) {
1091         printf("%08x ", *((unsigned *) p));
1092         p += 4;
1093         length -= 4;
1094      }
1095      printf("\n");
1096   }
1097}
1098#endif
1099