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"),
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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
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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 screens = ScreenCount(priv->dpy);
248 for (i = 0; i < screens; i++) {
249 psc = priv->screenConfigs[i];
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->driScreen) {
264 psc->driScreen->destroyScreen(psc);
265 psc->driScreen = NULL;
273 XFree((char *) priv->screenConfigs);
274 priv->screenConfigs = NULL;
278 ** Release the private memory referred to in a display private
279 ** structure. The caller will free the extension structure.
282 __glXFreeDisplayPrivate(XExtData * extension)
284 __GLXdisplayPrivate *priv;
286 priv = (__GLXdisplayPrivate *) extension->private_data;
287 FreeScreenConfigs(priv);
288 if (priv->serverGLXvendor) {
289 Xfree((char *) priv->serverGLXvendor);
290 priv->serverGLXvendor = 0x0; /* to protect against double free's */
292 if (priv->serverGLXversion) {
293 Xfree((char *) priv->serverGLXversion);
294 priv->serverGLXversion = 0x0; /* to protect against double free's */
297 __glxHashDestroy(priv->drawHash);
299 #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
300 /* Free the direct rendering per display data */
301 if (priv->driswDisplay)
302 (*priv->driswDisplay->destroyDisplay) (priv->driswDisplay);
303 priv->driswDisplay = NULL;
305 if (priv->driDisplay)
306 (*priv->driDisplay->destroyDisplay) (priv->driDisplay);
307 priv->driDisplay = NULL;
309 if (priv->dri2Display)
310 (*priv->dri2Display->destroyDisplay) (priv->dri2Display);
311 priv->dri2Display = NULL;
314 Xfree((char *) priv);
318 /************************************************************************/
321 ** Query the version of the GLX extension. This procedure works even if
322 ** the client extension is not completely set up.
325 QueryVersion(Display * dpy, int opcode, int *major, int *minor)
328 xcb_connection_t *c = XGetXCBConnection(dpy);
329 xcb_glx_query_version_reply_t *reply = xcb_glx_query_version_reply(c,
330 xcb_glx_query_version
336 if (reply->major_version != GLX_MAJOR_VERSION) {
340 *major = reply->major_version;
341 *minor = min(reply->minor_version, GLX_MINOR_VERSION);
345 xGLXQueryVersionReq *req;
346 xGLXQueryVersionReply reply;
348 /* Send the glXQueryVersion request */
350 GetReq(GLXQueryVersion, req);
351 req->reqType = opcode;
352 req->glxCode = X_GLXQueryVersion;
353 req->majorVersion = GLX_MAJOR_VERSION;
354 req->minorVersion = GLX_MINOR_VERSION;
355 _XReply(dpy, (xReply *) & reply, 0, False);
359 if (reply.majorVersion != GLX_MAJOR_VERSION) {
361 ** The server does not support the same major release as this
366 *major = reply.majorVersion;
367 *minor = min(reply.minorVersion, GLX_MINOR_VERSION);
373 * We don't want to enable this GLX_OML_swap_method in glxext.h,
374 * because we can't support it. The X server writes it out though,
375 * so we should handle it somehow, to avoid false warnings.
378 IGNORE_GLX_SWAP_METHOD_OML = 0x8060
383 * getVisualConfigs uses the !tagged_only path.
384 * getFBConfigs uses the tagged_only path.
387 __glXInitializeVisualConfigFromTags(__GLcontextModes * config, int count,
388 const INT32 * bp, Bool tagged_only,
389 Bool fbconfig_style_tags)
394 /* Copy in the first set of properties */
395 config->visualID = *bp++;
397 config->visualType = _gl_convert_from_x_visual_type(*bp++);
399 config->rgbMode = *bp++;
401 config->redBits = *bp++;
402 config->greenBits = *bp++;
403 config->blueBits = *bp++;
404 config->alphaBits = *bp++;
405 config->accumRedBits = *bp++;
406 config->accumGreenBits = *bp++;
407 config->accumBlueBits = *bp++;
408 config->accumAlphaBits = *bp++;
410 config->doubleBufferMode = *bp++;
411 config->stereoMode = *bp++;
413 config->rgbBits = *bp++;
414 config->depthBits = *bp++;
415 config->stencilBits = *bp++;
416 config->numAuxBuffers = *bp++;
417 config->level = *bp++;
419 #ifdef GLX_USE_APPLEGL
420 /* AppleSGLX supports pixmap and pbuffers with all config. */
421 config->drawableType = GLX_WINDOW_BIT | GLX_PIXMAP_BIT | GLX_PBUFFER_BIT;
422 /* Unfortunately this can create an ABI compatibility problem. */
425 count -= __GLX_MIN_CONFIG_PROPS;
430 ** Additional properties may be in a list at the end
431 ** of the reply. They are in pairs of property type
432 ** and property value.
435 #define FETCH_OR_SET(tag) \
436 config-> tag = ( fbconfig_style_tags ) ? *bp++ : 1
438 for (i = 0; i < count; i += 2) {
439 long int tag = *bp++;
443 FETCH_OR_SET(rgbMode);
445 case GLX_BUFFER_SIZE:
446 config->rgbBits = *bp++;
449 config->level = *bp++;
451 case GLX_DOUBLEBUFFER:
452 FETCH_OR_SET(doubleBufferMode);
455 FETCH_OR_SET(stereoMode);
457 case GLX_AUX_BUFFERS:
458 config->numAuxBuffers = *bp++;
461 config->redBits = *bp++;
464 config->greenBits = *bp++;
467 config->blueBits = *bp++;
470 config->alphaBits = *bp++;
473 config->depthBits = *bp++;
475 case GLX_STENCIL_SIZE:
476 config->stencilBits = *bp++;
478 case GLX_ACCUM_RED_SIZE:
479 config->accumRedBits = *bp++;
481 case GLX_ACCUM_GREEN_SIZE:
482 config->accumGreenBits = *bp++;
484 case GLX_ACCUM_BLUE_SIZE:
485 config->accumBlueBits = *bp++;
487 case GLX_ACCUM_ALPHA_SIZE:
488 config->accumAlphaBits = *bp++;
490 case GLX_VISUAL_CAVEAT_EXT:
491 config->visualRating = *bp++;
493 case GLX_X_VISUAL_TYPE:
494 config->visualType = *bp++;
496 case GLX_TRANSPARENT_TYPE:
497 config->transparentPixel = *bp++;
499 case GLX_TRANSPARENT_INDEX_VALUE:
500 config->transparentIndex = *bp++;
502 case GLX_TRANSPARENT_RED_VALUE:
503 config->transparentRed = *bp++;
505 case GLX_TRANSPARENT_GREEN_VALUE:
506 config->transparentGreen = *bp++;
508 case GLX_TRANSPARENT_BLUE_VALUE:
509 config->transparentBlue = *bp++;
511 case GLX_TRANSPARENT_ALPHA_VALUE:
512 config->transparentAlpha = *bp++;
515 config->visualID = *bp++;
517 case GLX_DRAWABLE_TYPE:
518 config->drawableType = *bp++;
519 #ifdef GLX_USE_APPLEGL
520 /* AppleSGLX supports pixmap and pbuffers with all config. */
521 config->drawableType |= GLX_WINDOW_BIT | GLX_PIXMAP_BIT | GLX_PBUFFER_BIT;
524 case GLX_RENDER_TYPE:
525 config->renderType = *bp++;
527 case GLX_X_RENDERABLE:
528 config->xRenderable = *bp++;
530 case GLX_FBCONFIG_ID:
531 config->fbconfigID = *bp++;
533 case GLX_MAX_PBUFFER_WIDTH:
534 config->maxPbufferWidth = *bp++;
536 case GLX_MAX_PBUFFER_HEIGHT:
537 config->maxPbufferHeight = *bp++;
539 case GLX_MAX_PBUFFER_PIXELS:
540 config->maxPbufferPixels = *bp++;
542 #ifndef GLX_USE_APPLEGL
543 case GLX_OPTIMAL_PBUFFER_WIDTH_SGIX:
544 config->optimalPbufferWidth = *bp++;
546 case GLX_OPTIMAL_PBUFFER_HEIGHT_SGIX:
547 config->optimalPbufferHeight = *bp++;
549 case GLX_VISUAL_SELECT_GROUP_SGIX:
550 config->visualSelectGroup = *bp++;
552 case GLX_SWAP_METHOD_OML:
553 config->swapMethod = *bp++;
556 case GLX_SAMPLE_BUFFERS_SGIS:
557 config->sampleBuffers = *bp++;
559 case GLX_SAMPLES_SGIS:
560 config->samples = *bp++;
562 #ifdef GLX_USE_APPLEGL
563 case IGNORE_GLX_SWAP_METHOD_OML:
564 /* We ignore this tag. See the comment above this function. */
568 case GLX_BIND_TO_TEXTURE_RGB_EXT:
569 config->bindToTextureRgb = *bp++;
571 case GLX_BIND_TO_TEXTURE_RGBA_EXT:
572 config->bindToTextureRgba = *bp++;
574 case GLX_BIND_TO_MIPMAP_TEXTURE_EXT:
575 config->bindToMipmapTexture = *bp++;
577 case GLX_BIND_TO_TEXTURE_TARGETS_EXT:
578 config->bindToTextureTargets = *bp++;
580 case GLX_Y_INVERTED_EXT:
581 config->yInverted = *bp++;
585 if (fbconfig_style_tags)
592 if(getenv("LIBGL_DIAGNOSTIC")) {
593 long int tagvalue = *bp++;
594 fprintf(stderr, "WARNING: unknown GLX tag from server: "
595 "tag 0x%lx value 0x%lx\n", tag, tagvalue);
597 /* Ignore the unrecognized tag's value */
605 (config->rgbMode) ? GLX_RGBA_BIT : GLX_COLOR_INDEX_BIT;
607 config->haveAccumBuffer = ((config->accumRedBits +
608 config->accumGreenBits +
609 config->accumBlueBits +
610 config->accumAlphaBits) > 0);
611 config->haveDepthBuffer = (config->depthBits > 0);
612 config->haveStencilBuffer = (config->stencilBits > 0);
615 static __GLcontextModes *
616 createConfigsFromProperties(Display * dpy, int nvisuals, int nprops,
617 int screen, GLboolean tagged_only)
619 INT32 buf[__GLX_TOTAL_CONFIG], *props;
621 __GLcontextModes *modes, *m;
627 /* FIXME: Is the __GLX_MIN_CONFIG_PROPS test correct for FBconfigs? */
629 /* Check number of properties */
630 if (nprops < __GLX_MIN_CONFIG_PROPS || nprops > __GLX_MAX_CONFIG_PROPS)
633 /* Allocate memory for our config structure */
634 modes = _gl_context_modes_create(nvisuals, sizeof(__GLcontextModes));
638 prop_size = nprops * __GLX_SIZE_INT32;
639 if (prop_size <= sizeof(buf))
642 props = Xmalloc(prop_size);
644 /* Read each config structure and convert it into our format */
646 for (i = 0; i < nvisuals; i++) {
647 _XRead(dpy, (char *) props, prop_size);
648 #ifdef GLX_USE_APPLEGL
649 /* Older X servers don't send this so we default it here. */
650 m->drawableType = GLX_WINDOW_BIT;
653 * The XQuartz 2.3.2.1 X server doesn't set this properly, so
654 * set the proper bits here.
655 * AppleSGLX supports windows, pixmaps, and pbuffers with all config.
657 m->drawableType = GLX_WINDOW_BIT | GLX_PIXMAP_BIT | GLX_PBUFFER_BIT;
659 __glXInitializeVisualConfigFromTags(m, nprops, props,
660 tagged_only, GL_TRUE);
672 getVisualConfigs(__GLXscreenConfigs *psc,
673 __GLXdisplayPrivate *priv, int screen)
675 xGLXGetVisualConfigsReq *req;
676 xGLXGetVisualConfigsReply reply;
677 Display *dpy = priv->dpy;
682 GetReq(GLXGetVisualConfigs, req);
683 req->reqType = priv->majorOpcode;
684 req->glxCode = X_GLXGetVisualConfigs;
685 req->screen = screen;
687 if (!_XReply(dpy, (xReply *) & reply, 0, False))
690 psc->visuals = createConfigsFromProperties(dpy,
697 return psc->visuals != NULL;
701 getFBConfigs(__GLXscreenConfigs *psc, __GLXdisplayPrivate *priv, int screen)
703 xGLXGetFBConfigsReq *fb_req;
704 xGLXGetFBConfigsSGIXReq *sgi_req;
705 xGLXVendorPrivateWithReplyReq *vpreq;
706 xGLXGetFBConfigsReply reply;
707 Display *dpy = priv->dpy;
710 __glXQueryServerString(dpy, priv->majorOpcode, screen, GLX_EXTENSIONS);
715 if (atof(priv->serverGLXversion) >= 1.3) {
716 GetReq(GLXGetFBConfigs, fb_req);
717 fb_req->reqType = priv->majorOpcode;
718 fb_req->glxCode = X_GLXGetFBConfigs;
719 fb_req->screen = screen;
721 else if (strstr(psc->serverGLXexts, "GLX_SGIX_fbconfig") != NULL) {
722 GetReqExtra(GLXVendorPrivateWithReply,
723 sz_xGLXGetFBConfigsSGIXReq +
724 sz_xGLXVendorPrivateWithReplyReq, vpreq);
725 sgi_req = (xGLXGetFBConfigsSGIXReq *) vpreq;
726 sgi_req->reqType = priv->majorOpcode;
727 sgi_req->glxCode = X_GLXVendorPrivateWithReply;
728 sgi_req->vendorCode = X_GLXvop_GetFBConfigsSGIX;
729 sgi_req->screen = screen;
734 if (!_XReply(dpy, (xReply *) & reply, 0, False))
737 psc->configs = createConfigsFromProperties(dpy,
739 reply.numAttribs * 2,
744 return psc->configs != NULL;
748 glx_screen_init(__GLXscreenConfigs *psc,
749 int screen, __GLXdisplayPrivate * priv)
751 /* Initialize per screen dynamic client GLX extensions */
752 psc->ext_list_first_time = GL_TRUE;
754 psc->dpy = priv->dpy;
757 getVisualConfigs(psc, priv, screen);
758 getFBConfigs(psc, priv, screen);
763 static __GLXscreenConfigs *
764 createIndirectScreen()
766 __GLXscreenConfigs *psc;
768 psc = Xmalloc(sizeof *psc);
769 memset(psc, 0, sizeof *psc);
775 ** Allocate the memory for the per screen configs for each screen.
776 ** If that works then fetch the per screen configs data.
779 AllocAndFetchScreenConfigs(Display * dpy, __GLXdisplayPrivate * priv)
781 __GLXscreenConfigs *psc;
785 ** First allocate memory for the array of per screen configs.
787 screens = ScreenCount(dpy);
788 priv->screenConfigs = Xmalloc(screens * sizeof *priv->screenConfigs);
789 if (!priv->screenConfigs)
792 priv->serverGLXversion =
793 __glXQueryServerString(dpy, priv->majorOpcode, 0, GLX_VERSION);
794 if (priv->serverGLXversion == NULL) {
795 FreeScreenConfigs(priv);
799 for (i = 0; i < screens; i++, psc++) {
800 #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
801 if (priv->dri2Display)
802 psc = (*priv->dri2Display->createScreen) (i, priv);
803 if (psc == NULL && priv->driDisplay)
804 psc = (*priv->driDisplay->createScreen) (i, priv);
805 if (psc == NULL && priv->driswDisplay)
806 psc = (*priv->driswDisplay->createScreen) (i, priv);
808 psc = createIndirectScreen (i, priv);
810 priv->screenConfigs[i] = psc;
817 ** Initialize the client side extension code.
819 _X_HIDDEN __GLXdisplayPrivate *
820 __glXInitialize(Display * dpy)
822 XExtDisplayInfo *info = __glXFindDisplay(dpy);
823 XExtData **privList, *private, *found;
824 __GLXdisplayPrivate *dpyPriv;
825 XEDataObject dataObj;
827 #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
828 Bool glx_direct, glx_accel;
831 /* The one and only long long lock */
834 if (!XextHasExtension(info)) {
835 /* No GLX extension supported by this server. Oh well. */
837 XMissingExtension(dpy, __glXExtensionName);
841 /* See if a display private already exists. If so, return it */
842 dataObj.display = dpy;
843 privList = XEHeadOfExtensionList(dataObj);
844 found = XFindOnExtensionList(privList, info->codes->extension);
847 return (__GLXdisplayPrivate *) found->private_data;
850 /* See if the versions are compatible */
851 if (!QueryVersion(dpy, info->codes->major_opcode, &major, &minor)) {
852 /* The client and server do not agree on versions. Punt. */
858 ** Allocate memory for all the pieces needed for this buffer.
860 private = (XExtData *) Xmalloc(sizeof(XExtData));
865 dpyPriv = (__GLXdisplayPrivate *) Xcalloc(1, sizeof(__GLXdisplayPrivate));
868 Xfree((char *) private);
873 ** Init the display private and then read in the screen config
874 ** structures from the server.
876 dpyPriv->majorOpcode = info->codes->major_opcode;
877 dpyPriv->majorVersion = major;
878 dpyPriv->minorVersion = minor;
881 dpyPriv->serverGLXvendor = 0x0;
882 dpyPriv->serverGLXversion = 0x0;
884 #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
885 glx_direct = (getenv("LIBGL_ALWAYS_INDIRECT") == NULL);
886 glx_accel = (getenv("LIBGL_ALWAYS_SOFTWARE") == NULL);
888 dpyPriv->drawHash = __glxHashCreate();
891 ** Initialize the direct rendering per display data and functions.
892 ** Note: This _must_ be done before calling any other DRI routines
893 ** (e.g., those called in AllocAndFetchScreenConfigs).
895 if (glx_direct && glx_accel) {
896 dpyPriv->dri2Display = dri2CreateDisplay(dpy);
897 dpyPriv->driDisplay = driCreateDisplay(dpy);
900 dpyPriv->driswDisplay = driswCreateDisplay(dpy);
902 #ifdef GLX_USE_APPLEGL
903 if (apple_init_glx(dpy) || !AllocAndFetchScreenConfigs(dpy, dpyPriv)) {
905 if (!AllocAndFetchScreenConfigs(dpy, dpyPriv)) {
908 Xfree((char *) dpyPriv);
909 Xfree((char *) private);
914 ** Fill in the private structure. This is the actual structure that
915 ** hangs off of the Display structure. Our private structure is
916 ** referred to by this structure. Got that?
918 private->number = info->codes->extension;
920 private->free_private = __glXFreeDisplayPrivate;
921 private->private_data = (char *) dpyPriv;
922 XAddToExtensionList(privList, private);
924 if (dpyPriv->majorVersion == 1 && dpyPriv->minorVersion >= 1) {
925 __glXClientInfo(dpy, dpyPriv->majorOpcode);
933 ** Setup for sending a GLX command on dpy. Make sure the extension is
934 ** initialized. Try to avoid calling __glXInitialize as its kinda slow.
937 __glXSetupForCommand(Display * dpy)
940 __GLXdisplayPrivate *priv;
942 /* If this thread has a current context, flush its rendering commands */
943 gc = __glXGetCurrentContext();
944 if (gc->currentDpy) {
945 /* Flush rendering buffer of the current context, if any */
946 (void) __glXFlushRenderBuffer(gc, gc->pc);
948 if (gc->currentDpy == dpy) {
949 /* Use opcode from gc because its right */
950 return gc->majorOpcode;
954 ** Have to get info about argument dpy because it might be to
955 ** a different server
960 /* Forced to lookup extension via the slow initialize route */
961 priv = __glXInitialize(dpy);
965 return priv->majorOpcode;
969 * Flush the drawing command transport buffer.
971 * \param ctx Context whose transport buffer is to be flushed.
972 * \param pc Pointer to first unused buffer location.
975 * Modify this function to use \c ctx->pc instead of the explicit
979 __glXFlushRenderBuffer(__GLXcontext * ctx, GLubyte * pc)
981 Display *const dpy = ctx->currentDpy;
983 xcb_connection_t *c = XGetXCBConnection(dpy);
987 const GLint size = pc - ctx->buf;
989 if ((dpy != NULL) && (size > 0)) {
991 xcb_glx_render(c, ctx->currentContextTag, size,
992 (const uint8_t *) ctx->buf);
994 /* Send the entire buffer as an X request */
996 GetReq(GLXRender, req);
997 req->reqType = ctx->majorOpcode;
998 req->glxCode = X_GLXRender;
999 req->contextTag = ctx->currentContextTag;
1000 req->length += (size + 3) >> 2;
1001 _XSend(dpy, (char *) ctx->buf, size);
1007 /* Reset pointer and return it */
1014 * Send a portion of a GLXRenderLarge command to the server. The advantage of
1015 * this function over \c __glXSendLargeCommand is that callers can use the
1016 * data buffer in the GLX context and may be able to avoid allocating an
1017 * extra buffer. The disadvantage is the clients will have to do more
1018 * GLX protocol work (i.e., calculating \c totalRequests, etc.).
1020 * \sa __glXSendLargeCommand
1022 * \param gc GLX context
1023 * \param requestNumber Which part of the whole command is this? The first
1025 * \param totalRequests How many requests will there be?
1026 * \param data Command data.
1027 * \param dataLen Size, in bytes, of the command data.
1030 __glXSendLargeChunk(__GLXcontext * gc, GLint requestNumber,
1031 GLint totalRequests, const GLvoid * data, GLint dataLen)
1033 Display *dpy = gc->currentDpy;
1035 xcb_connection_t *c = XGetXCBConnection(dpy);
1036 xcb_glx_render_large(c, gc->currentContextTag, requestNumber,
1037 totalRequests, dataLen, data);
1039 xGLXRenderLargeReq *req;
1041 if (requestNumber == 1) {
1045 GetReq(GLXRenderLarge, req);
1046 req->reqType = gc->majorOpcode;
1047 req->glxCode = X_GLXRenderLarge;
1048 req->contextTag = gc->currentContextTag;
1049 req->length += (dataLen + 3) >> 2;
1050 req->requestNumber = requestNumber;
1051 req->requestTotal = totalRequests;
1052 req->dataBytes = dataLen;
1053 Data(dpy, data, dataLen);
1055 if (requestNumber == totalRequests) {
1059 #endif /* USE_XCB */
1064 * Send a command that is too large for the GLXRender protocol request.
1066 * Send a large command, one that is too large for some reason to
1067 * send using the GLXRender protocol request. One reason to send
1068 * a large command is to avoid copying the data.
1070 * \param ctx GLX context
1071 * \param header Header data.
1072 * \param headerLen Size, in bytes, of the header data. It is assumed that
1073 * the header data will always be small enough to fit in
1074 * a single X protocol packet.
1075 * \param data Command data.
1076 * \param dataLen Size, in bytes, of the command data.
1079 __glXSendLargeCommand(__GLXcontext * ctx,
1080 const GLvoid * header, GLint headerLen,
1081 const GLvoid * data, GLint dataLen)
1084 GLint totalRequests, requestNumber;
1087 ** Calculate the maximum amount of data can be stuffed into a single
1088 ** packet. sz_xGLXRenderReq is added because bufSize is the maximum
1089 ** packet size minus sz_xGLXRenderReq.
1091 maxSize = (ctx->bufSize + sz_xGLXRenderReq) - sz_xGLXRenderLargeReq;
1092 totalRequests = 1 + (dataLen / maxSize);
1093 if (dataLen % maxSize)
1097 ** Send all of the command, except the large array, as one request.
1099 assert(headerLen <= maxSize);
1100 __glXSendLargeChunk(ctx, 1, totalRequests, header, headerLen);
1103 ** Send enough requests until the whole array is sent.
1105 for (requestNumber = 2; requestNumber <= (totalRequests - 1);
1107 __glXSendLargeChunk(ctx, requestNumber, totalRequests, data, maxSize);
1108 data = (const GLvoid *) (((const GLubyte *) data) + maxSize);
1110 assert(dataLen > 0);
1113 assert(dataLen <= maxSize);
1114 __glXSendLargeChunk(ctx, requestNumber, totalRequests, data, dataLen);
1117 /************************************************************************/
1121 __glXDumpDrawBuffer(__GLXcontext * ctx)
1123 GLubyte *p = ctx->buf;
1124 GLubyte *end = ctx->pc;
1125 GLushort opcode, length;
1129 opcode = *((GLushort *) p);
1130 length = *((GLushort *) (p + 2));
1131 printf("%2x: %5d: ", opcode, length);
1134 while (length > 0) {
1135 printf("%08x ", *((unsigned *) p));