2 * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
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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 #include <X11/extensions/dri2proto.h>
45 #ifdef GLX_USE_APPLEGL
46 #include "apple_glx.h"
47 #include "apple_visual.h"
49 #include "glxextensions.h"
52 #include <X11/Xlib-xcb.h>
59 void __glXDumpDrawBuffer(struct glx_context * ctx);
63 ** You can set this cell to 1 to force the gl drawing stuff to be
64 ** one command per packet
66 _X_HIDDEN int __glXDebug = 0;
68 /* Extension required boiler plate */
70 static const char __glXExtensionName[] = GLX_EXTENSION_NAME;
71 static struct glx_display *glx_displays;
73 static /* const */ char *error_list[] = {
79 "GLXBadCurrentWindow",
80 "GLXBadRenderRequest",
82 "GLXUnsupportedPrivateRequest",
85 "GLXBadCurrentDrawable",
89 #ifdef GLX_USE_APPLEGL
90 static char *__glXErrorString(Display *dpy, int code, XExtCodes *codes,
95 XEXT_GENERATE_ERROR_STRING(__glXErrorString, __glXExtensionName,
96 __GLX_NUMBER_ERRORS, error_list)
99 * GLX events are a bit funky. We don't stuff the X event code into
100 * our user exposed (via XNextEvent) structure. Instead we use the GLX
101 * private event code namespace (and hope it doesn't conflict). Clients
102 * have to know that bit 15 in the event type field means they're getting
103 * a GLX event, and then handle the various sub-event types there, rather
104 * than simply checking the event code and handling it directly.
108 __glXWireToEvent(Display *dpy, XEvent *event, xEvent *wire)
110 struct glx_display *glx_dpy = __glXInitialize(dpy);
115 switch ((wire->u.u.type & 0x7f) - glx_dpy->codes->first_event) {
116 case GLX_PbufferClobber:
118 GLXPbufferClobberEvent *aevent = (GLXPbufferClobberEvent *)event;
119 xGLXPbufferClobberEvent *awire = (xGLXPbufferClobberEvent *)wire;
120 aevent->event_type = awire->type;
121 aevent->serial = awire->sequenceNumber;
122 aevent->event_type = awire->event_type;
123 aevent->draw_type = awire->draw_type;
124 aevent->drawable = awire->drawable;
125 aevent->buffer_mask = awire->buffer_mask;
126 aevent->aux_buffer = awire->aux_buffer;
127 aevent->x = awire->x;
128 aevent->y = awire->y;
129 aevent->width = awire->width;
130 aevent->height = awire->height;
131 aevent->count = awire->count;
134 /* No easy symbol to test for this, as GLX_BufferSwapComplete is
135 * defined in the local glx.h header, but the
136 * xGLXBufferSwapComplete typedef is only available in new versions
137 * of the external glxproto.h header, which doesn't have any
138 * testable versioning define.
140 * I'll use the related DRI2 define, in the hope that we won't
141 * receive these events unless we know how to ask for them:
143 #ifdef X_DRI2SwapBuffers
144 case GLX_BufferSwapComplete:
146 GLXBufferSwapComplete *aevent = (GLXBufferSwapComplete *)event;
147 xGLXBufferSwapComplete *awire = (xGLXBufferSwapComplete *)wire;
148 aevent->event_type = awire->event_type;
149 aevent->drawable = awire->drawable;
150 aevent->ust = ((CARD64)awire->ust_hi << 32) | awire->ust_lo;
151 aevent->msc = ((CARD64)awire->msc_hi << 32) | awire->msc_lo;
152 aevent->sbc = ((CARD64)awire->sbc_hi << 32) | awire->sbc_lo;
157 /* client doesn't support server event */
164 /* We don't actually support this. It doesn't make sense for clients to
165 * send each other GLX events.
168 __glXEventToWire(Display *dpy, XEvent *event, xEvent *wire)
170 struct glx_display *glx_dpy = __glXInitialize(dpy);
175 switch (event->type) {
180 case GLX_EXCHANGE_COMPLETE_INTEL:
182 case GLX_COPY_COMPLETE_INTEL:
184 case GLX_FLIP_COMPLETE_INTEL:
187 /* client doesn't support server event */
194 /************************************************************************/
196 ** Free the per screen configs data as well as the array of
197 ** __glXScreenConfigs.
200 FreeScreenConfigs(struct glx_display * priv)
202 struct glx_screen *psc;
205 /* Free screen configuration information */
206 screens = ScreenCount(priv->dpy);
207 for (i = 0; i < screens; i++) {
208 psc = priv->screens[i];
210 glx_config_destroy_list(psc->configs);
211 if (psc->effectiveGLXexts)
212 Xfree(psc->effectiveGLXexts);
213 psc->configs = NULL; /* NOTE: just for paranoia */
216 glx_config_destroy_list(psc->visuals);
217 psc->visuals = NULL; /* NOTE: just for paranoia */
219 Xfree((char *) psc->serverGLXexts);
221 #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
222 if (psc->driScreen) {
223 psc->driScreen->destroyScreen(psc);
231 XFree((char *) priv->screens);
232 priv->screens = NULL;
236 glx_display_free(struct glx_display *priv)
238 struct glx_context *gc;
240 gc = __glXGetCurrentContext();
241 if (priv->dpy == gc->currentDpy) {
242 gc->vtable->destroy(gc);
243 __glXSetCurrentContextNull();
246 FreeScreenConfigs(priv);
247 if (priv->serverGLXvendor)
248 Xfree((char *) priv->serverGLXvendor);
249 if (priv->serverGLXversion)
250 Xfree((char *) priv->serverGLXversion);
252 __glxHashDestroy(priv->drawHash);
254 #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
255 /* Free the direct rendering per display data */
256 if (priv->driswDisplay)
257 (*priv->driswDisplay->destroyDisplay) (priv->driswDisplay);
258 priv->driswDisplay = NULL;
260 if (priv->driDisplay)
261 (*priv->driDisplay->destroyDisplay) (priv->driDisplay);
262 priv->driDisplay = NULL;
264 if (priv->dri2Display)
265 (*priv->dri2Display->destroyDisplay) (priv->dri2Display);
266 priv->dri2Display = NULL;
269 Xfree((char *) priv);
273 __glXCloseDisplay(Display * dpy, XExtCodes * codes)
275 struct glx_display *priv, **prev;
277 _XLockMutex(_Xglobal_lock);
278 prev = &glx_displays;
279 for (priv = glx_displays; priv; prev = &priv->next, priv = priv->next) {
280 if (priv->dpy == dpy) {
281 (*prev) = priv->next;
285 _XUnlockMutex(_Xglobal_lock);
287 glx_display_free(priv);
293 ** Query the version of the GLX extension. This procedure works even if
294 ** the client extension is not completely set up.
297 QueryVersion(Display * dpy, int opcode, int *major, int *minor)
300 xcb_connection_t *c = XGetXCBConnection(dpy);
301 xcb_glx_query_version_reply_t *reply = xcb_glx_query_version_reply(c,
302 xcb_glx_query_version
308 if (reply->major_version != GLX_MAJOR_VERSION) {
312 *major = reply->major_version;
313 *minor = min(reply->minor_version, GLX_MINOR_VERSION);
317 xGLXQueryVersionReq *req;
318 xGLXQueryVersionReply reply;
320 /* Send the glXQueryVersion request */
322 GetReq(GLXQueryVersion, req);
323 req->reqType = opcode;
324 req->glxCode = X_GLXQueryVersion;
325 req->majorVersion = GLX_MAJOR_VERSION;
326 req->minorVersion = GLX_MINOR_VERSION;
327 _XReply(dpy, (xReply *) & reply, 0, False);
331 if (reply.majorVersion != GLX_MAJOR_VERSION) {
333 ** The server does not support the same major release as this
338 *major = reply.majorVersion;
339 *minor = min(reply.minorVersion, GLX_MINOR_VERSION);
345 * We don't want to enable this GLX_OML_swap_method in glxext.h,
346 * because we can't support it. The X server writes it out though,
347 * so we should handle it somehow, to avoid false warnings.
350 IGNORE_GLX_SWAP_METHOD_OML = 0x8060
355 convert_from_x_visual_type(int visualType)
357 static const int glx_visual_types[] = {
358 GLX_STATIC_GRAY, GLX_GRAY_SCALE,
359 GLX_STATIC_COLOR, GLX_PSEUDO_COLOR,
360 GLX_TRUE_COLOR, GLX_DIRECT_COLOR
363 if (visualType < ARRAY_SIZE(glx_visual_types))
364 return glx_visual_types[visualType];
370 * getVisualConfigs uses the !tagged_only path.
371 * getFBConfigs uses the tagged_only path.
374 __glXInitializeVisualConfigFromTags(struct glx_config * config, int count,
375 const INT32 * bp, Bool tagged_only,
376 Bool fbconfig_style_tags)
381 /* Copy in the first set of properties */
382 config->visualID = *bp++;
384 config->visualType = convert_from_x_visual_type(*bp++);
386 config->rgbMode = *bp++;
388 config->redBits = *bp++;
389 config->greenBits = *bp++;
390 config->blueBits = *bp++;
391 config->alphaBits = *bp++;
392 config->accumRedBits = *bp++;
393 config->accumGreenBits = *bp++;
394 config->accumBlueBits = *bp++;
395 config->accumAlphaBits = *bp++;
397 config->doubleBufferMode = *bp++;
398 config->stereoMode = *bp++;
400 config->rgbBits = *bp++;
401 config->depthBits = *bp++;
402 config->stencilBits = *bp++;
403 config->numAuxBuffers = *bp++;
404 config->level = *bp++;
406 #ifdef GLX_USE_APPLEGL
407 /* AppleSGLX supports pixmap and pbuffers with all config. */
408 config->drawableType = GLX_WINDOW_BIT | GLX_PIXMAP_BIT | GLX_PBUFFER_BIT;
409 /* Unfortunately this can create an ABI compatibility problem. */
412 count -= __GLX_MIN_CONFIG_PROPS;
417 ** Additional properties may be in a list at the end
418 ** of the reply. They are in pairs of property type
419 ** and property value.
422 #define FETCH_OR_SET(tag) \
423 config-> tag = ( fbconfig_style_tags ) ? *bp++ : 1
425 for (i = 0; i < count; i += 2) {
426 long int tag = *bp++;
430 FETCH_OR_SET(rgbMode);
432 case GLX_BUFFER_SIZE:
433 config->rgbBits = *bp++;
436 config->level = *bp++;
438 case GLX_DOUBLEBUFFER:
439 FETCH_OR_SET(doubleBufferMode);
442 FETCH_OR_SET(stereoMode);
444 case GLX_AUX_BUFFERS:
445 config->numAuxBuffers = *bp++;
448 config->redBits = *bp++;
451 config->greenBits = *bp++;
454 config->blueBits = *bp++;
457 config->alphaBits = *bp++;
460 config->depthBits = *bp++;
462 case GLX_STENCIL_SIZE:
463 config->stencilBits = *bp++;
465 case GLX_ACCUM_RED_SIZE:
466 config->accumRedBits = *bp++;
468 case GLX_ACCUM_GREEN_SIZE:
469 config->accumGreenBits = *bp++;
471 case GLX_ACCUM_BLUE_SIZE:
472 config->accumBlueBits = *bp++;
474 case GLX_ACCUM_ALPHA_SIZE:
475 config->accumAlphaBits = *bp++;
477 case GLX_VISUAL_CAVEAT_EXT:
478 config->visualRating = *bp++;
480 case GLX_X_VISUAL_TYPE:
481 config->visualType = *bp++;
483 case GLX_TRANSPARENT_TYPE:
484 config->transparentPixel = *bp++;
486 case GLX_TRANSPARENT_INDEX_VALUE:
487 config->transparentIndex = *bp++;
489 case GLX_TRANSPARENT_RED_VALUE:
490 config->transparentRed = *bp++;
492 case GLX_TRANSPARENT_GREEN_VALUE:
493 config->transparentGreen = *bp++;
495 case GLX_TRANSPARENT_BLUE_VALUE:
496 config->transparentBlue = *bp++;
498 case GLX_TRANSPARENT_ALPHA_VALUE:
499 config->transparentAlpha = *bp++;
502 config->visualID = *bp++;
504 case GLX_DRAWABLE_TYPE:
505 config->drawableType = *bp++;
506 #ifdef GLX_USE_APPLEGL
507 /* AppleSGLX supports pixmap and pbuffers with all config. */
508 config->drawableType |= GLX_WINDOW_BIT | GLX_PIXMAP_BIT | GLX_PBUFFER_BIT;
511 case GLX_RENDER_TYPE:
512 config->renderType = *bp++;
514 case GLX_X_RENDERABLE:
515 config->xRenderable = *bp++;
517 case GLX_FBCONFIG_ID:
518 config->fbconfigID = *bp++;
520 case GLX_MAX_PBUFFER_WIDTH:
521 config->maxPbufferWidth = *bp++;
523 case GLX_MAX_PBUFFER_HEIGHT:
524 config->maxPbufferHeight = *bp++;
526 case GLX_MAX_PBUFFER_PIXELS:
527 config->maxPbufferPixels = *bp++;
529 #ifndef GLX_USE_APPLEGL
530 case GLX_OPTIMAL_PBUFFER_WIDTH_SGIX:
531 config->optimalPbufferWidth = *bp++;
533 case GLX_OPTIMAL_PBUFFER_HEIGHT_SGIX:
534 config->optimalPbufferHeight = *bp++;
536 case GLX_VISUAL_SELECT_GROUP_SGIX:
537 config->visualSelectGroup = *bp++;
539 case GLX_SWAP_METHOD_OML:
540 config->swapMethod = *bp++;
543 case GLX_SAMPLE_BUFFERS_SGIS:
544 config->sampleBuffers = *bp++;
546 case GLX_SAMPLES_SGIS:
547 config->samples = *bp++;
549 #ifdef GLX_USE_APPLEGL
550 case IGNORE_GLX_SWAP_METHOD_OML:
551 /* We ignore this tag. See the comment above this function. */
555 case GLX_BIND_TO_TEXTURE_RGB_EXT:
556 config->bindToTextureRgb = *bp++;
558 case GLX_BIND_TO_TEXTURE_RGBA_EXT:
559 config->bindToTextureRgba = *bp++;
561 case GLX_BIND_TO_MIPMAP_TEXTURE_EXT:
562 config->bindToMipmapTexture = *bp++;
564 case GLX_BIND_TO_TEXTURE_TARGETS_EXT:
565 config->bindToTextureTargets = *bp++;
567 case GLX_Y_INVERTED_EXT:
568 config->yInverted = *bp++;
572 if (fbconfig_style_tags)
579 if(getenv("LIBGL_DIAGNOSTIC")) {
580 long int tagvalue = *bp++;
581 fprintf(stderr, "WARNING: unknown GLX tag from server: "
582 "tag 0x%lx value 0x%lx\n", tag, tagvalue);
584 /* Ignore the unrecognized tag's value */
592 (config->rgbMode) ? GLX_RGBA_BIT : GLX_COLOR_INDEX_BIT;
595 static struct glx_config *
596 createConfigsFromProperties(Display * dpy, int nvisuals, int nprops,
597 int screen, GLboolean tagged_only)
599 INT32 buf[__GLX_TOTAL_CONFIG], *props;
601 struct glx_config *modes, *m;
607 /* FIXME: Is the __GLX_MIN_CONFIG_PROPS test correct for FBconfigs? */
609 /* Check number of properties */
610 if (nprops < __GLX_MIN_CONFIG_PROPS || nprops > __GLX_MAX_CONFIG_PROPS)
613 /* Allocate memory for our config structure */
614 modes = glx_config_create_list(nvisuals);
618 prop_size = nprops * __GLX_SIZE_INT32;
619 if (prop_size <= sizeof(buf))
622 props = Xmalloc(prop_size);
624 /* Read each config structure and convert it into our format */
626 for (i = 0; i < nvisuals; i++) {
627 _XRead(dpy, (char *) props, prop_size);
628 #ifdef GLX_USE_APPLEGL
629 /* Older X servers don't send this so we default it here. */
630 m->drawableType = GLX_WINDOW_BIT;
633 * The XQuartz 2.3.2.1 X server doesn't set this properly, so
634 * set the proper bits here.
635 * AppleSGLX supports windows, pixmaps, and pbuffers with all config.
637 m->drawableType = GLX_WINDOW_BIT | GLX_PIXMAP_BIT | GLX_PBUFFER_BIT;
639 __glXInitializeVisualConfigFromTags(m, nprops, props,
640 tagged_only, GL_TRUE);
652 getVisualConfigs(struct glx_screen *psc,
653 struct glx_display *priv, int screen)
655 xGLXGetVisualConfigsReq *req;
656 xGLXGetVisualConfigsReply reply;
657 Display *dpy = priv->dpy;
662 GetReq(GLXGetVisualConfigs, req);
663 req->reqType = priv->majorOpcode;
664 req->glxCode = X_GLXGetVisualConfigs;
665 req->screen = screen;
667 if (!_XReply(dpy, (xReply *) & reply, 0, False))
670 psc->visuals = createConfigsFromProperties(dpy,
677 return psc->visuals != NULL;
681 getFBConfigs(struct glx_screen *psc, struct glx_display *priv, int screen)
683 xGLXGetFBConfigsReq *fb_req;
684 xGLXGetFBConfigsSGIXReq *sgi_req;
685 xGLXVendorPrivateWithReplyReq *vpreq;
686 xGLXGetFBConfigsReply reply;
687 Display *dpy = priv->dpy;
690 __glXQueryServerString(dpy, priv->majorOpcode, screen, GLX_EXTENSIONS);
695 if (atof(priv->serverGLXversion) >= 1.3) {
696 GetReq(GLXGetFBConfigs, fb_req);
697 fb_req->reqType = priv->majorOpcode;
698 fb_req->glxCode = X_GLXGetFBConfigs;
699 fb_req->screen = screen;
701 else if (strstr(psc->serverGLXexts, "GLX_SGIX_fbconfig") != NULL) {
702 GetReqExtra(GLXVendorPrivateWithReply,
703 sz_xGLXGetFBConfigsSGIXReq +
704 sz_xGLXVendorPrivateWithReplyReq, vpreq);
705 sgi_req = (xGLXGetFBConfigsSGIXReq *) vpreq;
706 sgi_req->reqType = priv->majorOpcode;
707 sgi_req->glxCode = X_GLXVendorPrivateWithReply;
708 sgi_req->vendorCode = X_GLXvop_GetFBConfigsSGIX;
709 sgi_req->screen = screen;
714 if (!_XReply(dpy, (xReply *) & reply, 0, False))
717 psc->configs = createConfigsFromProperties(dpy,
719 reply.numAttribs * 2,
724 return psc->configs != NULL;
728 glx_screen_init(struct glx_screen *psc,
729 int screen, struct glx_display * priv)
731 /* Initialize per screen dynamic client GLX extensions */
732 psc->ext_list_first_time = GL_TRUE;
734 psc->dpy = priv->dpy;
737 getVisualConfigs(psc, priv, screen);
738 getFBConfigs(psc, priv, screen);
744 ** Allocate the memory for the per screen configs for each screen.
745 ** If that works then fetch the per screen configs data.
748 AllocAndFetchScreenConfigs(Display * dpy, struct glx_display * priv)
750 struct glx_screen *psc;
754 ** First allocate memory for the array of per screen configs.
756 screens = ScreenCount(dpy);
757 priv->screens = Xmalloc(screens * sizeof *priv->screens);
761 priv->serverGLXversion =
762 __glXQueryServerString(dpy, priv->majorOpcode, 0, GLX_VERSION);
763 if (priv->serverGLXversion == NULL) {
764 FreeScreenConfigs(priv);
768 for (i = 0; i < screens; i++, psc++) {
770 #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
771 if (priv->dri2Display)
772 psc = (*priv->dri2Display->createScreen) (i, priv);
773 if (psc == NULL && priv->driDisplay)
774 psc = (*priv->driDisplay->createScreen) (i, priv);
775 if (psc == NULL && priv->driswDisplay)
776 psc = (*priv->driswDisplay->createScreen) (i, priv);
778 #if defined(GLX_USE_APPLEGL)
779 if (psc == NULL && priv->appleglDisplay)
780 psc = (*priv->appleglDisplay->createScreen) (i, priv);
783 psc = indirect_create_screen(i, priv);
784 priv->screens[i] = psc;
791 ** Initialize the client side extension code.
793 _X_HIDDEN struct glx_display *
794 __glXInitialize(Display * dpy)
796 struct glx_display *dpyPriv, *d;
797 #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
798 Bool glx_direct, glx_accel;
802 _XLockMutex(_Xglobal_lock);
804 for (dpyPriv = glx_displays; dpyPriv; dpyPriv = dpyPriv->next) {
805 if (dpyPriv->dpy == dpy) {
806 _XUnlockMutex(_Xglobal_lock);
811 /* Drop the lock while we create the display private. */
812 _XUnlockMutex(_Xglobal_lock);
814 dpyPriv = Xcalloc(1, sizeof *dpyPriv);
818 dpyPriv->codes = XInitExtension(dpy, __glXExtensionName);
819 if (!dpyPriv->codes) {
821 _XUnlockMutex(_Xglobal_lock);
826 dpyPriv->majorOpcode = dpyPriv->codes->major_opcode;
827 dpyPriv->serverGLXvendor = 0x0;
828 dpyPriv->serverGLXversion = 0x0;
830 /* See if the versions are compatible */
831 if (!QueryVersion(dpy, dpyPriv->majorOpcode,
832 &dpyPriv->majorVersion, &dpyPriv->minorVersion)) {
834 _XUnlockMutex(_Xglobal_lock);
838 for (i = 0; i < __GLX_NUMBER_EVENTS; i++) {
839 XESetWireToEvent(dpy, dpyPriv->codes->first_event + i, __glXWireToEvent);
840 XESetEventToWire(dpy, dpyPriv->codes->first_event + i, __glXEventToWire);
843 XESetCloseDisplay(dpy, dpyPriv->codes->extension, __glXCloseDisplay);
844 XESetErrorString (dpy, dpyPriv->codes->extension,__glXErrorString);
846 #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
847 glx_direct = (getenv("LIBGL_ALWAYS_INDIRECT") == NULL);
848 glx_accel = (getenv("LIBGL_ALWAYS_SOFTWARE") == NULL);
850 dpyPriv->drawHash = __glxHashCreate();
853 ** Initialize the direct rendering per display data and functions.
854 ** Note: This _must_ be done before calling any other DRI routines
855 ** (e.g., those called in AllocAndFetchScreenConfigs).
857 if (glx_direct && glx_accel) {
858 dpyPriv->dri2Display = dri2CreateDisplay(dpy);
859 dpyPriv->driDisplay = driCreateDisplay(dpy);
862 dpyPriv->driswDisplay = driswCreateDisplay(dpy);
865 #ifdef GLX_USE_APPLEGL
866 if (!applegl_create_display(dpyPriv)) {
871 if (!AllocAndFetchScreenConfigs(dpy, dpyPriv)) {
876 if (dpyPriv->majorVersion == 1 && dpyPriv->minorVersion >= 1)
877 __glXClientInfo(dpy, dpyPriv->majorOpcode);
879 /* Grab the lock again and add the dispay private, unless somebody
880 * beat us to initializing on this display in the meantime. */
881 _XLockMutex(_Xglobal_lock);
883 for (d = glx_displays; d; d = d->next) {
885 _XUnlockMutex(_Xglobal_lock);
886 glx_display_free(dpyPriv);
891 dpyPriv->next = glx_displays;
892 glx_displays = dpyPriv;
894 _XUnlockMutex(_Xglobal_lock);
900 ** Setup for sending a GLX command on dpy. Make sure the extension is
901 ** initialized. Try to avoid calling __glXInitialize as its kinda slow.
904 __glXSetupForCommand(Display * dpy)
906 struct glx_context *gc;
907 struct glx_display *priv;
909 /* If this thread has a current context, flush its rendering commands */
910 gc = __glXGetCurrentContext();
911 if (gc->currentDpy) {
912 /* Flush rendering buffer of the current context, if any */
913 (void) __glXFlushRenderBuffer(gc, gc->pc);
915 if (gc->currentDpy == dpy) {
916 /* Use opcode from gc because its right */
917 return gc->majorOpcode;
921 ** Have to get info about argument dpy because it might be to
922 ** a different server
927 /* Forced to lookup extension via the slow initialize route */
928 priv = __glXInitialize(dpy);
932 return priv->majorOpcode;
936 * Flush the drawing command transport buffer.
938 * \param ctx Context whose transport buffer is to be flushed.
939 * \param pc Pointer to first unused buffer location.
942 * Modify this function to use \c ctx->pc instead of the explicit
946 __glXFlushRenderBuffer(struct glx_context * ctx, GLubyte * pc)
948 Display *const dpy = ctx->currentDpy;
950 xcb_connection_t *c = XGetXCBConnection(dpy);
954 const GLint size = pc - ctx->buf;
956 if ((dpy != NULL) && (size > 0)) {
958 xcb_glx_render(c, ctx->currentContextTag, size,
959 (const uint8_t *) ctx->buf);
961 /* Send the entire buffer as an X request */
963 GetReq(GLXRender, req);
964 req->reqType = ctx->majorOpcode;
965 req->glxCode = X_GLXRender;
966 req->contextTag = ctx->currentContextTag;
967 req->length += (size + 3) >> 2;
968 _XSend(dpy, (char *) ctx->buf, size);
974 /* Reset pointer and return it */
981 * Send a portion of a GLXRenderLarge command to the server. The advantage of
982 * this function over \c __glXSendLargeCommand is that callers can use the
983 * data buffer in the GLX context and may be able to avoid allocating an
984 * extra buffer. The disadvantage is the clients will have to do more
985 * GLX protocol work (i.e., calculating \c totalRequests, etc.).
987 * \sa __glXSendLargeCommand
989 * \param gc GLX context
990 * \param requestNumber Which part of the whole command is this? The first
992 * \param totalRequests How many requests will there be?
993 * \param data Command data.
994 * \param dataLen Size, in bytes, of the command data.
997 __glXSendLargeChunk(struct glx_context * gc, GLint requestNumber,
998 GLint totalRequests, const GLvoid * data, GLint dataLen)
1000 Display *dpy = gc->currentDpy;
1002 xcb_connection_t *c = XGetXCBConnection(dpy);
1003 xcb_glx_render_large(c, gc->currentContextTag, requestNumber,
1004 totalRequests, dataLen, data);
1006 xGLXRenderLargeReq *req;
1008 if (requestNumber == 1) {
1012 GetReq(GLXRenderLarge, req);
1013 req->reqType = gc->majorOpcode;
1014 req->glxCode = X_GLXRenderLarge;
1015 req->contextTag = gc->currentContextTag;
1016 req->length += (dataLen + 3) >> 2;
1017 req->requestNumber = requestNumber;
1018 req->requestTotal = totalRequests;
1019 req->dataBytes = dataLen;
1020 Data(dpy, data, dataLen);
1022 if (requestNumber == totalRequests) {
1026 #endif /* USE_XCB */
1031 * Send a command that is too large for the GLXRender protocol request.
1033 * Send a large command, one that is too large for some reason to
1034 * send using the GLXRender protocol request. One reason to send
1035 * a large command is to avoid copying the data.
1037 * \param ctx GLX context
1038 * \param header Header data.
1039 * \param headerLen Size, in bytes, of the header data. It is assumed that
1040 * the header data will always be small enough to fit in
1041 * a single X protocol packet.
1042 * \param data Command data.
1043 * \param dataLen Size, in bytes, of the command data.
1046 __glXSendLargeCommand(struct glx_context * ctx,
1047 const GLvoid * header, GLint headerLen,
1048 const GLvoid * data, GLint dataLen)
1051 GLint totalRequests, requestNumber;
1054 ** Calculate the maximum amount of data can be stuffed into a single
1055 ** packet. sz_xGLXRenderReq is added because bufSize is the maximum
1056 ** packet size minus sz_xGLXRenderReq.
1058 maxSize = (ctx->bufSize + sz_xGLXRenderReq) - sz_xGLXRenderLargeReq;
1059 totalRequests = 1 + (dataLen / maxSize);
1060 if (dataLen % maxSize)
1064 ** Send all of the command, except the large array, as one request.
1066 assert(headerLen <= maxSize);
1067 __glXSendLargeChunk(ctx, 1, totalRequests, header, headerLen);
1070 ** Send enough requests until the whole array is sent.
1072 for (requestNumber = 2; requestNumber <= (totalRequests - 1);
1074 __glXSendLargeChunk(ctx, requestNumber, totalRequests, data, maxSize);
1075 data = (const GLvoid *) (((const GLubyte *) data) + maxSize);
1077 assert(dataLen > 0);
1080 assert(dataLen <= maxSize);
1081 __glXSendLargeChunk(ctx, requestNumber, totalRequests, data, dataLen);
1084 /************************************************************************/
1088 __glXDumpDrawBuffer(struct glx_context * ctx)
1090 GLubyte *p = ctx->buf;
1091 GLubyte *end = ctx->pc;
1092 GLushort opcode, length;
1096 opcode = *((GLushort *) p);
1097 length = *((GLushort *) (p + 2));
1098 printf("%2x: %5d: ", opcode, length);
1101 while (length > 0) {
1102 printf("%08x ", *((unsigned *) p));