2 * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
3 * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
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:
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.
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
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.
33 * GLX protocol interface boot-strap code.
35 * Direct rendering support added by Precision Insight, Inc.
37 * \author Kevin E. Martin <kevin@precisioninsight.com>
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"
49 #include "glxextensions.h"
50 #include "glcontextmodes.h"
53 #include <X11/Xlib-xcb.h>
60 void __glXDumpDrawBuffer(__GLXcontext * ctx);
64 ** You can set this cell to 1 to force the gl drawing stuff to be
65 ** one command per packet
67 _X_HIDDEN int __glXDebug = 0;
69 /* Extension required boiler plate */
71 static char *__glXExtensionName = GLX_EXTENSION_NAME;
72 #ifdef GLX_USE_APPLEGL
73 static XExtensionInfo __glXExtensionInfo_data;
74 XExtensionInfo *__glXExtensionInfo = &__glXExtensionInfo_data;
76 XExtensionInfo *__glXExtensionInfo = NULL;
79 static /* const */ char *error_list[] = {
85 "GLXBadCurrentWindow",
86 "GLXBadRenderRequest",
88 "GLXUnsupportedPrivateRequest",
91 "GLXBadCurrentDrawable",
96 __glXCloseDisplay(Display * dpy, XExtCodes * codes)
100 gc = __glXGetCurrentContext();
101 if (dpy == gc->currentDpy) {
102 __glXSetCurrentContextNull();
103 __glXFreeContext(gc);
106 return XextRemoveDisplay(__glXExtensionInfo, dpy);
110 #ifdef GLX_USE_APPLEGL
111 static char *__glXErrorString(Display *dpy, int code, XExtCodes *codes,
116 XEXT_GENERATE_ERROR_STRING(__glXErrorString, __glXExtensionName,
117 __GLX_NUMBER_ERRORS, error_list)
119 __glXWireToEvent(Display *dpy, XEvent *event, xEvent *wire);
121 __glXEventToWire(Display *dpy, XEvent *event, xEvent *wire);
123 static /* const */ XExtensionHooks __glXExtensionHooks = {
124 NULL, /* create_gc */
128 NULL, /* create_font */
129 NULL, /* free_font */
130 __glXCloseDisplay, /* close_display */
131 __glXWireToEvent, /* wire_to_event */
132 __glXEventToWire, /* event_to_wire */
134 __glXErrorString, /* error_string */
137 XEXT_GENERATE_FIND_DISPLAY(__glXFindDisplay, __glXExtensionInfo,
138 __glXExtensionName, &__glXExtensionHooks,
139 __GLX_NUMBER_EVENTS, NULL)
142 * GLX events are a bit funky. We don't stuff the X event code into
143 * our user exposed (via XNextEvent) structure. Instead we use the GLX
144 * private event code namespace (and hope it doesn't conflict). Clients
145 * have to know that bit 15 in the event type field means they're getting
146 * a GLX event, and then handle the various sub-event types there, rather
147 * than simply checking the event code and handling it directly.
151 __glXWireToEvent(Display *dpy, XEvent *event, xEvent *wire)
153 XExtDisplayInfo *info = __glXFindDisplay(dpy);
155 XextCheckExtension(dpy, info, __glXExtensionName, False);
157 switch ((wire->u.u.type & 0x7f) - info->codes->first_event) {
158 case GLX_PbufferClobber:
160 GLXPbufferClobberEvent *aevent = (GLXPbufferClobberEvent *)event;
161 xGLXPbufferClobberEvent *awire = (xGLXPbufferClobberEvent *)wire;
162 aevent->event_type = awire->type;
163 aevent->serial = awire->sequenceNumber;
164 aevent->event_type = awire->event_type;
165 aevent->draw_type = awire->draw_type;
166 aevent->drawable = awire->drawable;
167 aevent->buffer_mask = awire->buffer_mask;
168 aevent->aux_buffer = awire->aux_buffer;
169 aevent->x = awire->x;
170 aevent->y = awire->y;
171 aevent->width = awire->width;
172 aevent->height = awire->height;
173 aevent->count = awire->count;
176 /* No easy symbol to test for this, as GLX_BufferSwapComplete is
177 * defined in the local glx.h header, but the
178 * xGLXBufferSwapComplete typedef is only available in new versions
179 * of the external glxproto.h header, which doesn't have any
180 * testable versioning define.
182 * I'll use the related DRI2 define, in the hope that we won't
183 * receive these events unless we know how to ask for them:
185 #ifdef X_DRI2SwapBuffers
186 case GLX_BufferSwapComplete:
188 GLXBufferSwapComplete *aevent = (GLXBufferSwapComplete *)event;
189 xGLXBufferSwapComplete *awire = (xGLXBufferSwapComplete *)wire;
190 aevent->event_type = awire->event_type;
191 aevent->drawable = awire->drawable;
192 aevent->ust = ((CARD64)awire->ust_hi << 32) | awire->ust_lo;
193 aevent->msc = ((CARD64)awire->msc_hi << 32) | awire->msc_lo;
194 aevent->sbc = ((CARD64)awire->sbc_hi << 32) | awire->sbc_lo;
199 /* client doesn't support server event */
206 /* We don't actually support this. It doesn't make sense for clients to
207 * send each other GLX events.
210 __glXEventToWire(Display *dpy, XEvent *event, xEvent *wire)
212 XExtDisplayInfo *info = __glXFindDisplay(dpy);
214 XextCheckExtension(dpy, info, __glXExtensionName, False);
216 switch (event->type) {
221 case GLX_EXCHANGE_COMPLETE_INTEL:
223 case GLX_COPY_COMPLETE_INTEL:
225 case GLX_FLIP_COMPLETE_INTEL:
228 /* client doesn't support server event */
235 /************************************************************************/
237 ** Free the per screen configs data as well as the array of
238 ** __glXScreenConfigs.
241 FreeScreenConfigs(__GLXdisplayPrivate * priv)
243 __GLXscreenConfigs *psc;
246 /* Free screen configuration information */
247 psc = priv->screenConfigs;
248 screens = ScreenCount(priv->dpy);
249 for (i = 0; i < screens; i++, psc++) {
251 _gl_context_modes_destroy(psc->configs);
252 if (psc->effectiveGLXexts)
253 Xfree(psc->effectiveGLXexts);
254 psc->configs = NULL; /* NOTE: just for paranoia */
257 _gl_context_modes_destroy(psc->visuals);
258 psc->visuals = NULL; /* NOTE: just for paranoia */
260 Xfree((char *) psc->serverGLXexts);
262 #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
263 if (psc->driver_configs) {
265 for (j = 0; psc->driver_configs[j]; j++)
266 free((__DRIconfig *) psc->driver_configs[j]);
267 free(psc->driver_configs);
268 psc->driver_configs = NULL;
270 if (psc->driScreen) {
271 psc->driScreen->destroyScreen(psc);
272 __glxHashDestroy(psc->drawHash);
273 XFree(psc->driScreen);
274 psc->driScreen = NULL;
278 XFree((char *) priv->screenConfigs);
279 priv->screenConfigs = NULL;
283 ** Release the private memory referred to in a display private
284 ** structure. The caller will free the extension structure.
287 __glXFreeDisplayPrivate(XExtData * extension)
289 __GLXdisplayPrivate *priv;
291 priv = (__GLXdisplayPrivate *) extension->private_data;
292 FreeScreenConfigs(priv);
293 if (priv->serverGLXvendor) {
294 Xfree((char *) priv->serverGLXvendor);
295 priv->serverGLXvendor = 0x0; /* to protect against double free's */
297 if (priv->serverGLXversion) {
298 Xfree((char *) priv->serverGLXversion);
299 priv->serverGLXversion = 0x0; /* to protect against double free's */
302 #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
303 /* Free the direct rendering per display data */
304 if (priv->driswDisplay)
305 (*priv->driswDisplay->destroyDisplay) (priv->driswDisplay);
306 priv->driswDisplay = NULL;
308 if (priv->driDisplay)
309 (*priv->driDisplay->destroyDisplay) (priv->driDisplay);
310 priv->driDisplay = NULL;
312 if (priv->dri2Display)
313 (*priv->dri2Display->destroyDisplay) (priv->dri2Display);
314 priv->dri2Display = NULL;
317 Xfree((char *) priv);
321 /************************************************************************/
324 ** Query the version of the GLX extension. This procedure works even if
325 ** the client extension is not completely set up.
328 QueryVersion(Display * dpy, int opcode, int *major, int *minor)
331 xcb_connection_t *c = XGetXCBConnection(dpy);
332 xcb_glx_query_version_reply_t *reply = xcb_glx_query_version_reply(c,
333 xcb_glx_query_version
339 if (reply->major_version != GLX_MAJOR_VERSION) {
343 *major = reply->major_version;
344 *minor = min(reply->minor_version, GLX_MINOR_VERSION);
348 xGLXQueryVersionReq *req;
349 xGLXQueryVersionReply reply;
351 /* Send the glXQueryVersion request */
353 GetReq(GLXQueryVersion, req);
354 req->reqType = opcode;
355 req->glxCode = X_GLXQueryVersion;
356 req->majorVersion = GLX_MAJOR_VERSION;
357 req->minorVersion = GLX_MINOR_VERSION;
358 _XReply(dpy, (xReply *) & reply, 0, False);
362 if (reply.majorVersion != GLX_MAJOR_VERSION) {
364 ** The server does not support the same major release as this
369 *major = reply.majorVersion;
370 *minor = min(reply.minorVersion, GLX_MINOR_VERSION);
376 * We don't want to enable this GLX_OML_swap_method in glxext.h,
377 * because we can't support it. The X server writes it out though,
378 * so we should handle it somehow, to avoid false warnings.
381 IGNORE_GLX_SWAP_METHOD_OML = 0x8060
386 * getVisualConfigs uses the !tagged_only path.
387 * getFBConfigs uses the tagged_only path.
390 __glXInitializeVisualConfigFromTags(__GLcontextModes * config, int count,
391 const INT32 * bp, Bool tagged_only,
392 Bool fbconfig_style_tags)
397 /* Copy in the first set of properties */
398 config->visualID = *bp++;
400 config->visualType = _gl_convert_from_x_visual_type(*bp++);
402 config->rgbMode = *bp++;
404 config->redBits = *bp++;
405 config->greenBits = *bp++;
406 config->blueBits = *bp++;
407 config->alphaBits = *bp++;
408 config->accumRedBits = *bp++;
409 config->accumGreenBits = *bp++;
410 config->accumBlueBits = *bp++;
411 config->accumAlphaBits = *bp++;
413 config->doubleBufferMode = *bp++;
414 config->stereoMode = *bp++;
416 config->rgbBits = *bp++;
417 config->depthBits = *bp++;
418 config->stencilBits = *bp++;
419 config->numAuxBuffers = *bp++;
420 config->level = *bp++;
422 #ifdef GLX_USE_APPLEGL
423 /* AppleSGLX supports pixmap and pbuffers with all config. */
424 config->drawableType = GLX_WINDOW_BIT | GLX_PIXMAP_BIT | GLX_PBUFFER_BIT;
425 /* Unfortunately this can create an ABI compatibility problem. */
428 count -= __GLX_MIN_CONFIG_PROPS;
433 ** Additional properties may be in a list at the end
434 ** of the reply. They are in pairs of property type
435 ** and property value.
438 #define FETCH_OR_SET(tag) \
439 config-> tag = ( fbconfig_style_tags ) ? *bp++ : 1
441 for (i = 0; i < count; i += 2) {
442 long int tag = *bp++;
446 FETCH_OR_SET(rgbMode);
448 case GLX_BUFFER_SIZE:
449 config->rgbBits = *bp++;
452 config->level = *bp++;
454 case GLX_DOUBLEBUFFER:
455 FETCH_OR_SET(doubleBufferMode);
458 FETCH_OR_SET(stereoMode);
460 case GLX_AUX_BUFFERS:
461 config->numAuxBuffers = *bp++;
464 config->redBits = *bp++;
467 config->greenBits = *bp++;
470 config->blueBits = *bp++;
473 config->alphaBits = *bp++;
476 config->depthBits = *bp++;
478 case GLX_STENCIL_SIZE:
479 config->stencilBits = *bp++;
481 case GLX_ACCUM_RED_SIZE:
482 config->accumRedBits = *bp++;
484 case GLX_ACCUM_GREEN_SIZE:
485 config->accumGreenBits = *bp++;
487 case GLX_ACCUM_BLUE_SIZE:
488 config->accumBlueBits = *bp++;
490 case GLX_ACCUM_ALPHA_SIZE:
491 config->accumAlphaBits = *bp++;
493 case GLX_VISUAL_CAVEAT_EXT:
494 config->visualRating = *bp++;
496 case GLX_X_VISUAL_TYPE:
497 config->visualType = *bp++;
499 case GLX_TRANSPARENT_TYPE:
500 config->transparentPixel = *bp++;
502 case GLX_TRANSPARENT_INDEX_VALUE:
503 config->transparentIndex = *bp++;
505 case GLX_TRANSPARENT_RED_VALUE:
506 config->transparentRed = *bp++;
508 case GLX_TRANSPARENT_GREEN_VALUE:
509 config->transparentGreen = *bp++;
511 case GLX_TRANSPARENT_BLUE_VALUE:
512 config->transparentBlue = *bp++;
514 case GLX_TRANSPARENT_ALPHA_VALUE:
515 config->transparentAlpha = *bp++;
518 config->visualID = *bp++;
520 case GLX_DRAWABLE_TYPE:
521 config->drawableType = *bp++;
522 #ifdef GLX_USE_APPLEGL
523 /* AppleSGLX supports pixmap and pbuffers with all config. */
524 config->drawableType |= GLX_WINDOW_BIT | GLX_PIXMAP_BIT | GLX_PBUFFER_BIT;
527 case GLX_RENDER_TYPE:
528 config->renderType = *bp++;
530 case GLX_X_RENDERABLE:
531 config->xRenderable = *bp++;
533 case GLX_FBCONFIG_ID:
534 config->fbconfigID = *bp++;
536 case GLX_MAX_PBUFFER_WIDTH:
537 config->maxPbufferWidth = *bp++;
539 case GLX_MAX_PBUFFER_HEIGHT:
540 config->maxPbufferHeight = *bp++;
542 case GLX_MAX_PBUFFER_PIXELS:
543 config->maxPbufferPixels = *bp++;
545 #ifndef GLX_USE_APPLEGL
546 case GLX_OPTIMAL_PBUFFER_WIDTH_SGIX:
547 config->optimalPbufferWidth = *bp++;
549 case GLX_OPTIMAL_PBUFFER_HEIGHT_SGIX:
550 config->optimalPbufferHeight = *bp++;
552 case GLX_VISUAL_SELECT_GROUP_SGIX:
553 config->visualSelectGroup = *bp++;
555 case GLX_SWAP_METHOD_OML:
556 config->swapMethod = *bp++;
559 case GLX_SAMPLE_BUFFERS_SGIS:
560 config->sampleBuffers = *bp++;
562 case GLX_SAMPLES_SGIS:
563 config->samples = *bp++;
565 #ifdef GLX_USE_APPLEGL
566 case IGNORE_GLX_SWAP_METHOD_OML:
567 /* We ignore this tag. See the comment above this function. */
571 case GLX_BIND_TO_TEXTURE_RGB_EXT:
572 config->bindToTextureRgb = *bp++;
574 case GLX_BIND_TO_TEXTURE_RGBA_EXT:
575 config->bindToTextureRgba = *bp++;
577 case GLX_BIND_TO_MIPMAP_TEXTURE_EXT:
578 config->bindToMipmapTexture = *bp++;
580 case GLX_BIND_TO_TEXTURE_TARGETS_EXT:
581 config->bindToTextureTargets = *bp++;
583 case GLX_Y_INVERTED_EXT:
584 config->yInverted = *bp++;
588 if (fbconfig_style_tags) *bp++;
594 if(getenv("LIBGL_DIAGNOSTIC")) {
595 long int tagvalue = *bp++;
596 fprintf(stderr, "WARNING: unknown GLX tag from server: "
597 "tag 0x%lx value 0x%lx\n", tag, tagvalue);
599 /* Ignore the unrecognized tag's value */
608 (config->rgbMode) ? GLX_RGBA_BIT : GLX_COLOR_INDEX_BIT;
610 config->haveAccumBuffer = ((config->accumRedBits +
611 config->accumGreenBits +
612 config->accumBlueBits +
613 config->accumAlphaBits) > 0);
614 config->haveDepthBuffer = (config->depthBits > 0);
615 config->haveStencilBuffer = (config->stencilBits > 0);
618 static __GLcontextModes *
619 createConfigsFromProperties(Display * dpy, int nvisuals, int nprops,
620 int screen, GLboolean tagged_only)
622 INT32 buf[__GLX_TOTAL_CONFIG], *props;
624 __GLcontextModes *modes, *m;
630 /* FIXME: Is the __GLX_MIN_CONFIG_PROPS test correct for FBconfigs? */
632 /* Check number of properties */
633 if (nprops < __GLX_MIN_CONFIG_PROPS || nprops > __GLX_MAX_CONFIG_PROPS)
636 /* Allocate memory for our config structure */
637 modes = _gl_context_modes_create(nvisuals, sizeof(__GLcontextModes));
641 prop_size = nprops * __GLX_SIZE_INT32;
642 if (prop_size <= sizeof(buf))
645 props = Xmalloc(prop_size);
647 /* Read each config structure and convert it into our format */
649 for (i = 0; i < nvisuals; i++) {
650 _XRead(dpy, (char *) props, prop_size);
651 #ifdef GLX_USE_APPLEGL
652 /* Older X servers don't send this so we default it here. */
653 m->drawableType = GLX_WINDOW_BIT;
656 * The XQuartz 2.3.2.1 X server doesn't set this properly, so
657 * set the proper bits here.
658 * AppleSGLX supports windows, pixmaps, and pbuffers with all config.
660 m->drawableType = GLX_WINDOW_BIT | GLX_PIXMAP_BIT | GLX_PBUFFER_BIT;
662 __glXInitializeVisualConfigFromTags(m, nprops, props,
663 tagged_only, GL_TRUE);
675 getVisualConfigs(Display * dpy, __GLXdisplayPrivate * priv, int screen)
677 xGLXGetVisualConfigsReq *req;
678 __GLXscreenConfigs *psc;
679 xGLXGetVisualConfigsReply reply;
683 psc = priv->screenConfigs + screen;
685 GetReq(GLXGetVisualConfigs, req);
686 req->reqType = priv->majorOpcode;
687 req->glxCode = X_GLXGetVisualConfigs;
688 req->screen = screen;
690 if (!_XReply(dpy, (xReply *) & reply, 0, False))
693 psc->visuals = createConfigsFromProperties(dpy,
700 return psc->visuals != NULL;
704 getFBConfigs(Display * dpy, __GLXdisplayPrivate * priv, int screen)
706 xGLXGetFBConfigsReq *fb_req;
707 xGLXGetFBConfigsSGIXReq *sgi_req;
708 xGLXVendorPrivateWithReplyReq *vpreq;
709 xGLXGetFBConfigsReply reply;
710 __GLXscreenConfigs *psc;
712 psc = priv->screenConfigs + screen;
714 __glXQueryServerString(dpy, priv->majorOpcode, screen, GLX_EXTENSIONS);
719 if (atof(priv->serverGLXversion) >= 1.3) {
720 GetReq(GLXGetFBConfigs, fb_req);
721 fb_req->reqType = priv->majorOpcode;
722 fb_req->glxCode = X_GLXGetFBConfigs;
723 fb_req->screen = screen;
725 else if (strstr(psc->serverGLXexts, "GLX_SGIX_fbconfig") != NULL) {
726 GetReqExtra(GLXVendorPrivateWithReply,
727 sz_xGLXGetFBConfigsSGIXReq +
728 sz_xGLXVendorPrivateWithReplyReq, vpreq);
729 sgi_req = (xGLXGetFBConfigsSGIXReq *) vpreq;
730 sgi_req->reqType = priv->majorOpcode;
731 sgi_req->glxCode = X_GLXVendorPrivateWithReply;
732 sgi_req->vendorCode = X_GLXvop_GetFBConfigsSGIX;
733 sgi_req->screen = screen;
738 if (!_XReply(dpy, (xReply *) & reply, 0, False))
741 psc->configs = createConfigsFromProperties(dpy,
743 reply.numAttribs * 2,
748 return psc->configs != NULL;
752 ** Allocate the memory for the per screen configs for each screen.
753 ** If that works then fetch the per screen configs data.
756 AllocAndFetchScreenConfigs(Display * dpy, __GLXdisplayPrivate * priv)
758 __GLXscreenConfigs *psc;
762 ** First allocate memory for the array of per screen configs.
764 screens = ScreenCount(dpy);
765 psc = (__GLXscreenConfigs *) Xmalloc(screens * sizeof(__GLXscreenConfigs));
769 memset(psc, 0, screens * sizeof(__GLXscreenConfigs));
770 priv->screenConfigs = psc;
772 priv->serverGLXversion =
773 __glXQueryServerString(dpy, priv->majorOpcode, 0, GLX_VERSION);
774 if (priv->serverGLXversion == NULL) {
775 FreeScreenConfigs(priv);
779 for (i = 0; i < screens; i++, psc++) {
780 getVisualConfigs(dpy, priv, i);
781 getFBConfigs(dpy, priv, i);
783 #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
786 psc->drawHash = __glxHashCreate();
787 if (psc->drawHash == NULL)
790 /* Initialize per screen dynamic client GLX extensions */
791 psc->ext_list_first_time = GL_TRUE;
793 if (priv->dri2Display)
794 psc->driScreen = (*priv->dri2Display->createScreen) (psc, i, priv);
796 if (psc->driScreen == NULL && priv->driDisplay)
797 psc->driScreen = (*priv->driDisplay->createScreen) (psc, i, priv);
799 if (psc->driScreen == NULL && priv->driswDisplay)
800 psc->driScreen = (*priv->driswDisplay->createScreen) (psc, i, priv);
802 if (psc->driScreen == NULL) {
803 __glxHashDestroy(psc->drawHash);
804 psc->drawHash = NULL;
813 ** Initialize the client side extension code.
815 _X_HIDDEN __GLXdisplayPrivate *
816 __glXInitialize(Display * dpy)
818 XExtDisplayInfo *info = __glXFindDisplay(dpy);
819 XExtData **privList, *private, *found;
820 __GLXdisplayPrivate *dpyPriv;
821 XEDataObject dataObj;
823 #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
824 Bool glx_direct, glx_accel;
827 /* The one and only long long lock */
830 if (!XextHasExtension(info)) {
831 /* No GLX extension supported by this server. Oh well. */
833 XMissingExtension(dpy, __glXExtensionName);
837 /* See if a display private already exists. If so, return it */
838 dataObj.display = dpy;
839 privList = XEHeadOfExtensionList(dataObj);
840 found = XFindOnExtensionList(privList, info->codes->extension);
843 return (__GLXdisplayPrivate *) found->private_data;
846 /* See if the versions are compatible */
847 if (!QueryVersion(dpy, info->codes->major_opcode, &major, &minor)) {
848 /* The client and server do not agree on versions. Punt. */
854 ** Allocate memory for all the pieces needed for this buffer.
856 private = (XExtData *) Xmalloc(sizeof(XExtData));
861 dpyPriv = (__GLXdisplayPrivate *) Xcalloc(1, sizeof(__GLXdisplayPrivate));
864 Xfree((char *) private);
869 ** Init the display private and then read in the screen config
870 ** structures from the server.
872 dpyPriv->majorOpcode = info->codes->major_opcode;
873 dpyPriv->majorVersion = major;
874 dpyPriv->minorVersion = minor;
877 dpyPriv->serverGLXvendor = 0x0;
878 dpyPriv->serverGLXversion = 0x0;
880 #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
881 glx_direct = (getenv("LIBGL_ALWAYS_INDIRECT") == NULL);
882 glx_accel = (getenv("LIBGL_ALWAYS_SOFTWARE") == NULL);
885 ** Initialize the direct rendering per display data and functions.
886 ** Note: This _must_ be done before calling any other DRI routines
887 ** (e.g., those called in AllocAndFetchScreenConfigs).
889 if (glx_direct && glx_accel) {
890 dpyPriv->dri2Display = dri2CreateDisplay(dpy);
891 dpyPriv->driDisplay = driCreateDisplay(dpy);
894 dpyPriv->driswDisplay = driswCreateDisplay(dpy);
896 #ifdef GLX_USE_APPLEGL
897 if (apple_init_glx(dpy) || !AllocAndFetchScreenConfigs(dpy, dpyPriv)) {
899 if (!AllocAndFetchScreenConfigs(dpy, dpyPriv)) {
902 Xfree((char *) dpyPriv);
903 Xfree((char *) private);
908 ** Fill in the private structure. This is the actual structure that
909 ** hangs off of the Display structure. Our private structure is
910 ** referred to by this structure. Got that?
912 private->number = info->codes->extension;
914 private->free_private = __glXFreeDisplayPrivate;
915 private->private_data = (char *) dpyPriv;
916 XAddToExtensionList(privList, private);
918 if (dpyPriv->majorVersion == 1 && dpyPriv->minorVersion >= 1) {
919 __glXClientInfo(dpy, dpyPriv->majorOpcode);
927 ** Setup for sending a GLX command on dpy. Make sure the extension is
928 ** initialized. Try to avoid calling __glXInitialize as its kinda slow.
931 __glXSetupForCommand(Display * dpy)
934 __GLXdisplayPrivate *priv;
936 /* If this thread has a current context, flush its rendering commands */
937 gc = __glXGetCurrentContext();
938 if (gc->currentDpy) {
939 /* Flush rendering buffer of the current context, if any */
940 (void) __glXFlushRenderBuffer(gc, gc->pc);
942 if (gc->currentDpy == dpy) {
943 /* Use opcode from gc because its right */
944 return gc->majorOpcode;
948 ** Have to get info about argument dpy because it might be to
949 ** a different server
954 /* Forced to lookup extension via the slow initialize route */
955 priv = __glXInitialize(dpy);
959 return priv->majorOpcode;
963 * Flush the drawing command transport buffer.
965 * \param ctx Context whose transport buffer is to be flushed.
966 * \param pc Pointer to first unused buffer location.
969 * Modify this function to use \c ctx->pc instead of the explicit
973 __glXFlushRenderBuffer(__GLXcontext * ctx, GLubyte * pc)
975 Display *const dpy = ctx->currentDpy;
977 xcb_connection_t *c = XGetXCBConnection(dpy);
981 const GLint size = pc - ctx->buf;
983 if ((dpy != NULL) && (size > 0)) {
985 xcb_glx_render(c, ctx->currentContextTag, size,
986 (const uint8_t *) ctx->buf);
988 /* Send the entire buffer as an X request */
990 GetReq(GLXRender, req);
991 req->reqType = ctx->majorOpcode;
992 req->glxCode = X_GLXRender;
993 req->contextTag = ctx->currentContextTag;
994 req->length += (size + 3) >> 2;
995 _XSend(dpy, (char *) ctx->buf, size);
1001 /* Reset pointer and return it */
1008 * Send a portion of a GLXRenderLarge command to the server. The advantage of
1009 * this function over \c __glXSendLargeCommand is that callers can use the
1010 * data buffer in the GLX context and may be able to avoid allocating an
1011 * extra buffer. The disadvantage is the clients will have to do more
1012 * GLX protocol work (i.e., calculating \c totalRequests, etc.).
1014 * \sa __glXSendLargeCommand
1016 * \param gc GLX context
1017 * \param requestNumber Which part of the whole command is this? The first
1019 * \param totalRequests How many requests will there be?
1020 * \param data Command data.
1021 * \param dataLen Size, in bytes, of the command data.
1024 __glXSendLargeChunk(__GLXcontext * gc, GLint requestNumber,
1025 GLint totalRequests, const GLvoid * data, GLint dataLen)
1027 Display *dpy = gc->currentDpy;
1029 xcb_connection_t *c = XGetXCBConnection(dpy);
1030 xcb_glx_render_large(c, gc->currentContextTag, requestNumber,
1031 totalRequests, dataLen, data);
1033 xGLXRenderLargeReq *req;
1035 if (requestNumber == 1) {
1039 GetReq(GLXRenderLarge, req);
1040 req->reqType = gc->majorOpcode;
1041 req->glxCode = X_GLXRenderLarge;
1042 req->contextTag = gc->currentContextTag;
1043 req->length += (dataLen + 3) >> 2;
1044 req->requestNumber = requestNumber;
1045 req->requestTotal = totalRequests;
1046 req->dataBytes = dataLen;
1047 Data(dpy, data, dataLen);
1049 if (requestNumber == totalRequests) {
1053 #endif /* USE_XCB */
1058 * Send a command that is too large for the GLXRender protocol request.
1060 * Send a large command, one that is too large for some reason to
1061 * send using the GLXRender protocol request. One reason to send
1062 * a large command is to avoid copying the data.
1064 * \param ctx GLX context
1065 * \param header Header data.
1066 * \param headerLen Size, in bytes, of the header data. It is assumed that
1067 * the header data will always be small enough to fit in
1068 * a single X protocol packet.
1069 * \param data Command data.
1070 * \param dataLen Size, in bytes, of the command data.
1073 __glXSendLargeCommand(__GLXcontext * ctx,
1074 const GLvoid * header, GLint headerLen,
1075 const GLvoid * data, GLint dataLen)
1078 GLint totalRequests, requestNumber;
1081 ** Calculate the maximum amount of data can be stuffed into a single
1082 ** packet. sz_xGLXRenderReq is added because bufSize is the maximum
1083 ** packet size minus sz_xGLXRenderReq.
1085 maxSize = (ctx->bufSize + sz_xGLXRenderReq) - sz_xGLXRenderLargeReq;
1086 totalRequests = 1 + (dataLen / maxSize);
1087 if (dataLen % maxSize)
1091 ** Send all of the command, except the large array, as one request.
1093 assert(headerLen <= maxSize);
1094 __glXSendLargeChunk(ctx, 1, totalRequests, header, headerLen);
1097 ** Send enough requests until the whole array is sent.
1099 for (requestNumber = 2; requestNumber <= (totalRequests - 1);
1101 __glXSendLargeChunk(ctx, requestNumber, totalRequests, data, maxSize);
1102 data = (const GLvoid *) (((const GLubyte *) data) + maxSize);
1104 assert(dataLen > 0);
1107 assert(dataLen <= maxSize);
1108 __glXSendLargeChunk(ctx, requestNumber, totalRequests, data, dataLen);
1111 /************************************************************************/
1115 __glXDumpDrawBuffer(__GLXcontext * ctx)
1117 GLubyte *p = ctx->buf;
1118 GLubyte *end = ctx->pc;
1119 GLushort opcode, length;
1123 opcode = *((GLushort *) p);
1124 length = *((GLushort *) (p + 2));
1125 printf("%2x: %5d: ", opcode, length);
1128 while (length > 0) {
1129 printf("%08x ", *((unsigned *) p));