2 * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
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12 * The above copyright notice including the dates of first publication and
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14 * http://oss.sgi.com/projects/FreeB/
15 * shall be included in all copies or substantial portions of the Software.
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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.
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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 #ifdef GLX_USE_APPLEGL
45 #include "apple_glx.h"
46 #include "apple_visual.h"
48 #include "glxextensions.h"
51 #include <X11/Xlib-xcb.h>
58 void __glXDumpDrawBuffer(struct glx_context * ctx);
62 ** You can set this cell to 1 to force the gl drawing stuff to be
63 ** one command per packet
65 _X_HIDDEN int __glXDebug = 0;
67 /* Extension required boiler plate */
69 static const char __glXExtensionName[] = GLX_EXTENSION_NAME;
70 static struct glx_display *glx_displays;
72 static /* const */ char *error_list[] = {
78 "GLXBadCurrentWindow",
79 "GLXBadRenderRequest",
81 "GLXUnsupportedPrivateRequest",
84 "GLXBadCurrentDrawable",
88 #ifdef GLX_USE_APPLEGL
89 static char *__glXErrorString(Display *dpy, int code, XExtCodes *codes,
94 XEXT_GENERATE_ERROR_STRING(__glXErrorString, __glXExtensionName,
95 __GLX_NUMBER_ERRORS, error_list)
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.
107 __glXWireToEvent(Display *dpy, XEvent *event, xEvent *wire)
109 struct glx_display *glx_dpy = __glXInitialize(dpy);
114 switch ((wire->u.u.type & 0x7f) - glx_dpy->codes->first_event) {
115 case GLX_PbufferClobber:
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;
133 case GLX_BufferSwapComplete:
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;
145 /* client doesn't support server event */
152 /* We don't actually support this. It doesn't make sense for clients to
153 * send each other GLX events.
156 __glXEventToWire(Display *dpy, XEvent *event, xEvent *wire)
158 struct glx_display *glx_dpy = __glXInitialize(dpy);
163 switch (event->type) {
168 case GLX_EXCHANGE_COMPLETE_INTEL:
170 case GLX_COPY_COMPLETE_INTEL:
172 case GLX_FLIP_COMPLETE_INTEL:
175 /* client doesn't support server event */
182 /************************************************************************/
184 ** Free the per screen configs data as well as the array of
185 ** __glXScreenConfigs.
188 FreeScreenConfigs(struct glx_display * priv)
190 struct glx_screen *psc;
193 /* Free screen configuration information */
194 screens = ScreenCount(priv->dpy);
195 for (i = 0; i < screens; i++) {
196 psc = priv->screens[i];
197 glx_screen_cleanup(psc);
199 #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
200 if (psc->driScreen) {
201 psc->driScreen->destroyScreen(psc);
209 XFree((char *) priv->screens);
210 priv->screens = NULL;
214 glx_display_free(struct glx_display *priv)
216 struct glx_context *gc;
218 gc = __glXGetCurrentContext();
219 if (priv->dpy == gc->currentDpy) {
220 gc->vtable->destroy(gc);
221 __glXSetCurrentContextNull();
224 FreeScreenConfigs(priv);
225 if (priv->serverGLXvendor)
226 Xfree((char *) priv->serverGLXvendor);
227 if (priv->serverGLXversion)
228 Xfree((char *) priv->serverGLXversion);
230 #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
231 __glxHashDestroy(priv->drawHash);
233 /* Free the direct rendering per display data */
234 if (priv->driswDisplay)
235 (*priv->driswDisplay->destroyDisplay) (priv->driswDisplay);
236 priv->driswDisplay = NULL;
238 if (priv->driDisplay)
239 (*priv->driDisplay->destroyDisplay) (priv->driDisplay);
240 priv->driDisplay = NULL;
242 if (priv->dri2Display)
243 (*priv->dri2Display->destroyDisplay) (priv->dri2Display);
244 priv->dri2Display = NULL;
247 Xfree((char *) priv);
251 __glXCloseDisplay(Display * dpy, XExtCodes * codes)
253 struct glx_display *priv, **prev, *next;
255 _XLockMutex(_Xglobal_lock);
256 prev = &glx_displays;
257 for (priv = glx_displays; priv; prev = &priv->next, priv = priv->next) {
258 if (priv->dpy == dpy) {
263 /* Only remove the display from the list after it's destroyed. The cleanup
264 * code (e.g. driReleaseDrawables()) ends up calling __glXInitialize(),
265 * which would create a new glx_display while we're trying to destroy this
268 glx_display_free(priv);
270 _XUnlockMutex(_Xglobal_lock);
276 ** Query the version of the GLX extension. This procedure works even if
277 ** the client extension is not completely set up.
280 QueryVersion(Display * dpy, int opcode, int *major, int *minor)
283 xcb_connection_t *c = XGetXCBConnection(dpy);
284 xcb_glx_query_version_reply_t *reply = xcb_glx_query_version_reply(c,
285 xcb_glx_query_version
291 if (reply->major_version != GLX_MAJOR_VERSION) {
295 *major = reply->major_version;
296 *minor = min(reply->minor_version, GLX_MINOR_VERSION);
300 xGLXQueryVersionReq *req;
301 xGLXQueryVersionReply reply;
303 /* Send the glXQueryVersion request */
305 GetReq(GLXQueryVersion, req);
306 req->reqType = opcode;
307 req->glxCode = X_GLXQueryVersion;
308 req->majorVersion = GLX_MAJOR_VERSION;
309 req->minorVersion = GLX_MINOR_VERSION;
310 _XReply(dpy, (xReply *) & reply, 0, False);
314 if (reply.majorVersion != GLX_MAJOR_VERSION) {
316 ** The server does not support the same major release as this
321 *major = reply.majorVersion;
322 *minor = min(reply.minorVersion, GLX_MINOR_VERSION);
328 * We don't want to enable this GLX_OML_swap_method in glxext.h,
329 * because we can't support it. The X server writes it out though,
330 * so we should handle it somehow, to avoid false warnings.
333 IGNORE_GLX_SWAP_METHOD_OML = 0x8060
338 convert_from_x_visual_type(int visualType)
340 static const int glx_visual_types[] = {
341 GLX_STATIC_GRAY, GLX_GRAY_SCALE,
342 GLX_STATIC_COLOR, GLX_PSEUDO_COLOR,
343 GLX_TRUE_COLOR, GLX_DIRECT_COLOR
346 if (visualType < ARRAY_SIZE(glx_visual_types))
347 return glx_visual_types[visualType];
353 * getVisualConfigs uses the !tagged_only path.
354 * getFBConfigs uses the tagged_only path.
357 __glXInitializeVisualConfigFromTags(struct glx_config * config, int count,
358 const INT32 * bp, Bool tagged_only,
359 Bool fbconfig_style_tags)
364 /* Copy in the first set of properties */
365 config->visualID = *bp++;
367 config->visualType = convert_from_x_visual_type(*bp++);
369 config->rgbMode = *bp++;
371 config->redBits = *bp++;
372 config->greenBits = *bp++;
373 config->blueBits = *bp++;
374 config->alphaBits = *bp++;
375 config->accumRedBits = *bp++;
376 config->accumGreenBits = *bp++;
377 config->accumBlueBits = *bp++;
378 config->accumAlphaBits = *bp++;
380 config->doubleBufferMode = *bp++;
381 config->stereoMode = *bp++;
383 config->rgbBits = *bp++;
384 config->depthBits = *bp++;
385 config->stencilBits = *bp++;
386 config->numAuxBuffers = *bp++;
387 config->level = *bp++;
389 #ifdef GLX_USE_APPLEGL
390 /* AppleSGLX supports pixmap and pbuffers with all config. */
391 config->drawableType = GLX_WINDOW_BIT | GLX_PIXMAP_BIT | GLX_PBUFFER_BIT;
392 /* Unfortunately this can create an ABI compatibility problem. */
395 count -= __GLX_MIN_CONFIG_PROPS;
400 ** Additional properties may be in a list at the end
401 ** of the reply. They are in pairs of property type
402 ** and property value.
405 #define FETCH_OR_SET(tag) \
406 config-> tag = ( fbconfig_style_tags ) ? *bp++ : 1
408 for (i = 0; i < count; i += 2) {
409 long int tag = *bp++;
413 FETCH_OR_SET(rgbMode);
415 case GLX_BUFFER_SIZE:
416 config->rgbBits = *bp++;
419 config->level = *bp++;
421 case GLX_DOUBLEBUFFER:
422 FETCH_OR_SET(doubleBufferMode);
425 FETCH_OR_SET(stereoMode);
427 case GLX_AUX_BUFFERS:
428 config->numAuxBuffers = *bp++;
431 config->redBits = *bp++;
434 config->greenBits = *bp++;
437 config->blueBits = *bp++;
440 config->alphaBits = *bp++;
443 config->depthBits = *bp++;
445 case GLX_STENCIL_SIZE:
446 config->stencilBits = *bp++;
448 case GLX_ACCUM_RED_SIZE:
449 config->accumRedBits = *bp++;
451 case GLX_ACCUM_GREEN_SIZE:
452 config->accumGreenBits = *bp++;
454 case GLX_ACCUM_BLUE_SIZE:
455 config->accumBlueBits = *bp++;
457 case GLX_ACCUM_ALPHA_SIZE:
458 config->accumAlphaBits = *bp++;
460 case GLX_VISUAL_CAVEAT_EXT:
461 config->visualRating = *bp++;
463 case GLX_X_VISUAL_TYPE:
464 config->visualType = *bp++;
466 case GLX_TRANSPARENT_TYPE:
467 config->transparentPixel = *bp++;
469 case GLX_TRANSPARENT_INDEX_VALUE:
470 config->transparentIndex = *bp++;
472 case GLX_TRANSPARENT_RED_VALUE:
473 config->transparentRed = *bp++;
475 case GLX_TRANSPARENT_GREEN_VALUE:
476 config->transparentGreen = *bp++;
478 case GLX_TRANSPARENT_BLUE_VALUE:
479 config->transparentBlue = *bp++;
481 case GLX_TRANSPARENT_ALPHA_VALUE:
482 config->transparentAlpha = *bp++;
485 config->visualID = *bp++;
487 case GLX_DRAWABLE_TYPE:
488 config->drawableType = *bp++;
489 #ifdef GLX_USE_APPLEGL
490 /* AppleSGLX supports pixmap and pbuffers with all config. */
491 config->drawableType |= GLX_WINDOW_BIT | GLX_PIXMAP_BIT | GLX_PBUFFER_BIT;
494 case GLX_RENDER_TYPE:
495 config->renderType = *bp++;
497 case GLX_X_RENDERABLE:
498 config->xRenderable = *bp++;
500 case GLX_FBCONFIG_ID:
501 config->fbconfigID = *bp++;
503 case GLX_MAX_PBUFFER_WIDTH:
504 config->maxPbufferWidth = *bp++;
506 case GLX_MAX_PBUFFER_HEIGHT:
507 config->maxPbufferHeight = *bp++;
509 case GLX_MAX_PBUFFER_PIXELS:
510 config->maxPbufferPixels = *bp++;
512 #ifndef GLX_USE_APPLEGL
513 case GLX_OPTIMAL_PBUFFER_WIDTH_SGIX:
514 config->optimalPbufferWidth = *bp++;
516 case GLX_OPTIMAL_PBUFFER_HEIGHT_SGIX:
517 config->optimalPbufferHeight = *bp++;
519 case GLX_VISUAL_SELECT_GROUP_SGIX:
520 config->visualSelectGroup = *bp++;
522 case GLX_SWAP_METHOD_OML:
523 config->swapMethod = *bp++;
526 case GLX_SAMPLE_BUFFERS_SGIS:
527 config->sampleBuffers = *bp++;
529 case GLX_SAMPLES_SGIS:
530 config->samples = *bp++;
532 #ifdef GLX_USE_APPLEGL
533 case IGNORE_GLX_SWAP_METHOD_OML:
534 /* We ignore this tag. See the comment above this function. */
538 case GLX_BIND_TO_TEXTURE_RGB_EXT:
539 config->bindToTextureRgb = *bp++;
541 case GLX_BIND_TO_TEXTURE_RGBA_EXT:
542 config->bindToTextureRgba = *bp++;
544 case GLX_BIND_TO_MIPMAP_TEXTURE_EXT:
545 config->bindToMipmapTexture = *bp++;
547 case GLX_BIND_TO_TEXTURE_TARGETS_EXT:
548 config->bindToTextureTargets = *bp++;
550 case GLX_Y_INVERTED_EXT:
551 config->yInverted = *bp++;
554 case GLX_FRAMEBUFFER_SRGB_CAPABLE_EXT:
555 config->sRGBCapable = *bp++;
559 if (fbconfig_style_tags)
566 if(getenv("LIBGL_DIAGNOSTIC")) {
567 long int tagvalue = *bp++;
568 fprintf(stderr, "WARNING: unknown GLX tag from server: "
569 "tag 0x%lx value 0x%lx\n", tag, tagvalue);
571 /* Ignore the unrecognized tag's value */
579 (config->rgbMode) ? GLX_RGBA_BIT : GLX_COLOR_INDEX_BIT;
582 static struct glx_config *
583 createConfigsFromProperties(Display * dpy, int nvisuals, int nprops,
584 int screen, GLboolean tagged_only)
586 INT32 buf[__GLX_TOTAL_CONFIG], *props;
588 struct glx_config *modes, *m;
594 /* FIXME: Is the __GLX_MIN_CONFIG_PROPS test correct for FBconfigs? */
596 /* Check number of properties */
597 if (nprops < __GLX_MIN_CONFIG_PROPS || nprops > __GLX_MAX_CONFIG_PROPS)
600 /* Allocate memory for our config structure */
601 modes = glx_config_create_list(nvisuals);
605 prop_size = nprops * __GLX_SIZE_INT32;
606 if (prop_size <= sizeof(buf))
609 props = Xmalloc(prop_size);
611 /* Read each config structure and convert it into our format */
613 for (i = 0; i < nvisuals; i++) {
614 _XRead(dpy, (char *) props, prop_size);
615 #ifdef GLX_USE_APPLEGL
616 /* Older X servers don't send this so we default it here. */
617 m->drawableType = GLX_WINDOW_BIT;
620 * The XQuartz 2.3.2.1 X server doesn't set this properly, so
621 * set the proper bits here.
622 * AppleSGLX supports windows, pixmaps, and pbuffers with all config.
624 m->drawableType = GLX_WINDOW_BIT | GLX_PIXMAP_BIT | GLX_PBUFFER_BIT;
626 __glXInitializeVisualConfigFromTags(m, nprops, props,
627 tagged_only, GL_TRUE);
639 getVisualConfigs(struct glx_screen *psc,
640 struct glx_display *priv, int screen)
642 xGLXGetVisualConfigsReq *req;
643 xGLXGetVisualConfigsReply reply;
644 Display *dpy = priv->dpy;
649 GetReq(GLXGetVisualConfigs, req);
650 req->reqType = priv->majorOpcode;
651 req->glxCode = X_GLXGetVisualConfigs;
652 req->screen = screen;
654 if (!_XReply(dpy, (xReply *) & reply, 0, False))
657 psc->visuals = createConfigsFromProperties(dpy,
664 return psc->visuals != NULL;
668 getFBConfigs(struct glx_screen *psc, struct glx_display *priv, int screen)
670 xGLXGetFBConfigsReq *fb_req;
671 xGLXGetFBConfigsSGIXReq *sgi_req;
672 xGLXVendorPrivateWithReplyReq *vpreq;
673 xGLXGetFBConfigsReply reply;
674 Display *dpy = priv->dpy;
677 __glXQueryServerString(dpy, priv->majorOpcode, screen, GLX_EXTENSIONS);
682 if (atof(priv->serverGLXversion) >= 1.3) {
683 GetReq(GLXGetFBConfigs, fb_req);
684 fb_req->reqType = priv->majorOpcode;
685 fb_req->glxCode = X_GLXGetFBConfigs;
686 fb_req->screen = screen;
688 else if (strstr(psc->serverGLXexts, "GLX_SGIX_fbconfig") != NULL) {
689 GetReqExtra(GLXVendorPrivateWithReply,
690 sz_xGLXGetFBConfigsSGIXReq -
691 sz_xGLXVendorPrivateWithReplyReq, vpreq);
692 sgi_req = (xGLXGetFBConfigsSGIXReq *) vpreq;
693 sgi_req->reqType = priv->majorOpcode;
694 sgi_req->glxCode = X_GLXVendorPrivateWithReply;
695 sgi_req->vendorCode = X_GLXvop_GetFBConfigsSGIX;
696 sgi_req->screen = screen;
701 if (!_XReply(dpy, (xReply *) & reply, 0, False))
704 psc->configs = createConfigsFromProperties(dpy,
706 reply.numAttribs * 2,
711 return psc->configs != NULL;
715 glx_screen_init(struct glx_screen *psc,
716 int screen, struct glx_display * priv)
718 /* Initialize per screen dynamic client GLX extensions */
719 psc->ext_list_first_time = GL_TRUE;
721 psc->dpy = priv->dpy;
724 getVisualConfigs(psc, priv, screen);
725 getFBConfigs(psc, priv, screen);
731 glx_screen_cleanup(struct glx_screen *psc)
734 glx_config_destroy_list(psc->configs);
735 if (psc->effectiveGLXexts)
736 Xfree(psc->effectiveGLXexts);
737 psc->configs = NULL; /* NOTE: just for paranoia */
740 glx_config_destroy_list(psc->visuals);
741 psc->visuals = NULL; /* NOTE: just for paranoia */
743 Xfree((char *) psc->serverGLXexts);
747 ** Allocate the memory for the per screen configs for each screen.
748 ** If that works then fetch the per screen configs data.
751 AllocAndFetchScreenConfigs(Display * dpy, struct glx_display * priv)
753 struct glx_screen *psc;
757 ** First allocate memory for the array of per screen configs.
759 screens = ScreenCount(dpy);
760 priv->screens = Xmalloc(screens * sizeof *priv->screens);
764 priv->serverGLXversion =
765 __glXQueryServerString(dpy, priv->majorOpcode, 0, GLX_VERSION);
766 if (priv->serverGLXversion == NULL) {
767 FreeScreenConfigs(priv);
771 for (i = 0; i < screens; i++, psc++) {
773 #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
774 if (priv->dri2Display)
775 psc = (*priv->dri2Display->createScreen) (i, priv);
776 if (psc == NULL && priv->driDisplay)
777 psc = (*priv->driDisplay->createScreen) (i, priv);
778 if (psc == NULL && priv->driswDisplay)
779 psc = (*priv->driswDisplay->createScreen) (i, priv);
781 #if defined(GLX_USE_APPLEGL)
782 if (psc == NULL && priv->appleglDisplay)
783 psc = (*priv->appleglDisplay->createScreen) (i, priv);
786 psc = indirect_create_screen(i, priv);
787 priv->screens[i] = psc;
794 ** Initialize the client side extension code.
796 _X_HIDDEN struct glx_display *
797 __glXInitialize(Display * dpy)
799 struct glx_display *dpyPriv, *d;
800 #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
801 Bool glx_direct, glx_accel;
805 _XLockMutex(_Xglobal_lock);
807 for (dpyPriv = glx_displays; dpyPriv; dpyPriv = dpyPriv->next) {
808 if (dpyPriv->dpy == dpy) {
809 _XUnlockMutex(_Xglobal_lock);
814 /* Drop the lock while we create the display private. */
815 _XUnlockMutex(_Xglobal_lock);
817 dpyPriv = Xcalloc(1, sizeof *dpyPriv);
821 dpyPriv->codes = XInitExtension(dpy, __glXExtensionName);
822 if (!dpyPriv->codes) {
824 _XUnlockMutex(_Xglobal_lock);
829 dpyPriv->majorOpcode = dpyPriv->codes->major_opcode;
830 dpyPriv->serverGLXvendor = 0x0;
831 dpyPriv->serverGLXversion = 0x0;
833 /* See if the versions are compatible */
834 if (!QueryVersion(dpy, dpyPriv->majorOpcode,
835 &dpyPriv->majorVersion, &dpyPriv->minorVersion)) {
837 _XUnlockMutex(_Xglobal_lock);
841 for (i = 0; i < __GLX_NUMBER_EVENTS; i++) {
842 XESetWireToEvent(dpy, dpyPriv->codes->first_event + i, __glXWireToEvent);
843 XESetEventToWire(dpy, dpyPriv->codes->first_event + i, __glXEventToWire);
846 XESetCloseDisplay(dpy, dpyPriv->codes->extension, __glXCloseDisplay);
847 XESetErrorString (dpy, dpyPriv->codes->extension,__glXErrorString);
849 #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
850 glx_direct = (getenv("LIBGL_ALWAYS_INDIRECT") == NULL);
851 glx_accel = (getenv("LIBGL_ALWAYS_SOFTWARE") == NULL);
853 dpyPriv->drawHash = __glxHashCreate();
856 ** Initialize the direct rendering per display data and functions.
857 ** Note: This _must_ be done before calling any other DRI routines
858 ** (e.g., those called in AllocAndFetchScreenConfigs).
860 if (glx_direct && glx_accel) {
861 dpyPriv->dri2Display = dri2CreateDisplay(dpy);
862 dpyPriv->driDisplay = driCreateDisplay(dpy);
865 dpyPriv->driswDisplay = driswCreateDisplay(dpy);
868 #ifdef GLX_USE_APPLEGL
869 if (!applegl_create_display(dpyPriv)) {
874 if (!AllocAndFetchScreenConfigs(dpy, dpyPriv)) {
879 if (dpyPriv->majorVersion == 1 && dpyPriv->minorVersion >= 1)
880 __glXClientInfo(dpy, dpyPriv->majorOpcode);
882 /* Grab the lock again and add the dispay private, unless somebody
883 * beat us to initializing on this display in the meantime. */
884 _XLockMutex(_Xglobal_lock);
886 for (d = glx_displays; d; d = d->next) {
888 _XUnlockMutex(_Xglobal_lock);
889 glx_display_free(dpyPriv);
894 dpyPriv->next = glx_displays;
895 glx_displays = dpyPriv;
897 _XUnlockMutex(_Xglobal_lock);
903 ** Setup for sending a GLX command on dpy. Make sure the extension is
904 ** initialized. Try to avoid calling __glXInitialize as its kinda slow.
907 __glXSetupForCommand(Display * dpy)
909 struct glx_context *gc;
910 struct glx_display *priv;
912 /* If this thread has a current context, flush its rendering commands */
913 gc = __glXGetCurrentContext();
914 if (gc->currentDpy) {
915 /* Flush rendering buffer of the current context, if any */
916 (void) __glXFlushRenderBuffer(gc, gc->pc);
918 if (gc->currentDpy == dpy) {
919 /* Use opcode from gc because its right */
920 return gc->majorOpcode;
924 ** Have to get info about argument dpy because it might be to
925 ** a different server
930 /* Forced to lookup extension via the slow initialize route */
931 priv = __glXInitialize(dpy);
935 return priv->majorOpcode;
939 * Flush the drawing command transport buffer.
941 * \param ctx Context whose transport buffer is to be flushed.
942 * \param pc Pointer to first unused buffer location.
945 * Modify this function to use \c ctx->pc instead of the explicit
949 __glXFlushRenderBuffer(struct glx_context * ctx, GLubyte * pc)
951 Display *const dpy = ctx->currentDpy;
953 xcb_connection_t *c = XGetXCBConnection(dpy);
957 const GLint size = pc - ctx->buf;
959 if ((dpy != NULL) && (size > 0)) {
961 xcb_glx_render(c, ctx->currentContextTag, size,
962 (const uint8_t *) ctx->buf);
964 /* Send the entire buffer as an X request */
966 GetReq(GLXRender, req);
967 req->reqType = ctx->majorOpcode;
968 req->glxCode = X_GLXRender;
969 req->contextTag = ctx->currentContextTag;
970 req->length += (size + 3) >> 2;
971 _XSend(dpy, (char *) ctx->buf, size);
977 /* Reset pointer and return it */
984 * Send a portion of a GLXRenderLarge command to the server. The advantage of
985 * this function over \c __glXSendLargeCommand is that callers can use the
986 * data buffer in the GLX context and may be able to avoid allocating an
987 * extra buffer. The disadvantage is the clients will have to do more
988 * GLX protocol work (i.e., calculating \c totalRequests, etc.).
990 * \sa __glXSendLargeCommand
992 * \param gc GLX context
993 * \param requestNumber Which part of the whole command is this? The first
995 * \param totalRequests How many requests will there be?
996 * \param data Command data.
997 * \param dataLen Size, in bytes, of the command data.
1000 __glXSendLargeChunk(struct glx_context * gc, GLint requestNumber,
1001 GLint totalRequests, const GLvoid * data, GLint dataLen)
1003 Display *dpy = gc->currentDpy;
1005 xcb_connection_t *c = XGetXCBConnection(dpy);
1006 xcb_glx_render_large(c, gc->currentContextTag, requestNumber,
1007 totalRequests, dataLen, data);
1009 xGLXRenderLargeReq *req;
1011 if (requestNumber == 1) {
1015 GetReq(GLXRenderLarge, req);
1016 req->reqType = gc->majorOpcode;
1017 req->glxCode = X_GLXRenderLarge;
1018 req->contextTag = gc->currentContextTag;
1019 req->length += (dataLen + 3) >> 2;
1020 req->requestNumber = requestNumber;
1021 req->requestTotal = totalRequests;
1022 req->dataBytes = dataLen;
1023 Data(dpy, data, dataLen);
1025 if (requestNumber == totalRequests) {
1029 #endif /* USE_XCB */
1034 * Send a command that is too large for the GLXRender protocol request.
1036 * Send a large command, one that is too large for some reason to
1037 * send using the GLXRender protocol request. One reason to send
1038 * a large command is to avoid copying the data.
1040 * \param ctx GLX context
1041 * \param header Header data.
1042 * \param headerLen Size, in bytes, of the header data. It is assumed that
1043 * the header data will always be small enough to fit in
1044 * a single X protocol packet.
1045 * \param data Command data.
1046 * \param dataLen Size, in bytes, of the command data.
1049 __glXSendLargeCommand(struct glx_context * ctx,
1050 const GLvoid * header, GLint headerLen,
1051 const GLvoid * data, GLint dataLen)
1054 GLint totalRequests, requestNumber;
1057 ** Calculate the maximum amount of data can be stuffed into a single
1058 ** packet. sz_xGLXRenderReq is added because bufSize is the maximum
1059 ** packet size minus sz_xGLXRenderReq.
1061 maxSize = (ctx->bufSize + sz_xGLXRenderReq) - sz_xGLXRenderLargeReq;
1062 totalRequests = 1 + (dataLen / maxSize);
1063 if (dataLen % maxSize)
1067 ** Send all of the command, except the large array, as one request.
1069 assert(headerLen <= maxSize);
1070 __glXSendLargeChunk(ctx, 1, totalRequests, header, headerLen);
1073 ** Send enough requests until the whole array is sent.
1075 for (requestNumber = 2; requestNumber <= (totalRequests - 1);
1077 __glXSendLargeChunk(ctx, requestNumber, totalRequests, data, maxSize);
1078 data = (const GLvoid *) (((const GLubyte *) data) + maxSize);
1080 assert(dataLen > 0);
1083 assert(dataLen <= maxSize);
1084 __glXSendLargeChunk(ctx, requestNumber, totalRequests, data, dataLen);
1087 /************************************************************************/
1091 __glXDumpDrawBuffer(struct glx_context * ctx)
1093 GLubyte *p = ctx->buf;
1094 GLubyte *end = ctx->pc;
1095 GLushort opcode, length;
1099 opcode = *((GLushort *) p);
1100 length = *((GLushort *) (p + 2));
1101 printf("%2x: %5d: ", opcode, length);
1104 while (length > 0) {
1105 printf("%08x ", *((unsigned *) p));