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 #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 xGLXBufferSwapComplete2 *awire = (xGLXBufferSwapComplete2 *)wire;
137 struct glx_drawable *glxDraw = GetGLXDrawable(dpy, awire->drawable);
138 aevent->event_type = awire->event_type;
139 aevent->drawable = awire->drawable;
140 aevent->ust = ((CARD64)awire->ust_hi << 32) | awire->ust_lo;
141 aevent->msc = ((CARD64)awire->msc_hi << 32) | awire->msc_lo;
146 if (awire->sbc < glxDraw->lastEventSbc)
147 glxDraw->eventSbcWrap += 0x100000000;
148 glxDraw->lastEventSbc = awire->sbc;
149 aevent->sbc = awire->sbc + glxDraw->eventSbcWrap;
153 /* client doesn't support server event */
160 /* We don't actually support this. It doesn't make sense for clients to
161 * send each other GLX events.
164 __glXEventToWire(Display *dpy, XEvent *event, xEvent *wire)
166 struct glx_display *glx_dpy = __glXInitialize(dpy);
171 switch (event->type) {
176 case GLX_EXCHANGE_COMPLETE_INTEL:
178 case GLX_COPY_COMPLETE_INTEL:
180 case GLX_FLIP_COMPLETE_INTEL:
183 /* client doesn't support server event */
190 /************************************************************************/
192 ** Free the per screen configs data as well as the array of
193 ** __glXScreenConfigs.
196 FreeScreenConfigs(struct glx_display * priv)
198 struct glx_screen *psc;
201 /* Free screen configuration information */
202 screens = ScreenCount(priv->dpy);
203 for (i = 0; i < screens; i++) {
204 psc = priv->screens[i];
205 glx_screen_cleanup(psc);
207 #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
208 if (psc->driScreen) {
209 psc->driScreen->destroyScreen(psc);
217 XFree((char *) priv->screens);
218 priv->screens = NULL;
222 glx_display_free(struct glx_display *priv)
224 struct glx_context *gc;
226 gc = __glXGetCurrentContext();
227 if (priv->dpy == gc->currentDpy) {
228 gc->vtable->destroy(gc);
229 __glXSetCurrentContextNull();
232 FreeScreenConfigs(priv);
233 if (priv->serverGLXvendor)
234 Xfree((char *) priv->serverGLXvendor);
235 if (priv->serverGLXversion)
236 Xfree((char *) priv->serverGLXversion);
238 __glxHashDestroy(priv->glXDrawHash);
240 #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
241 __glxHashDestroy(priv->drawHash);
243 /* Free the direct rendering per display data */
244 if (priv->driswDisplay)
245 (*priv->driswDisplay->destroyDisplay) (priv->driswDisplay);
246 priv->driswDisplay = NULL;
248 if (priv->driDisplay)
249 (*priv->driDisplay->destroyDisplay) (priv->driDisplay);
250 priv->driDisplay = NULL;
252 if (priv->dri2Display)
253 (*priv->dri2Display->destroyDisplay) (priv->dri2Display);
254 priv->dri2Display = NULL;
257 Xfree((char *) priv);
261 __glXCloseDisplay(Display * dpy, XExtCodes * codes)
263 struct glx_display *priv, **prev, *next;
265 _XLockMutex(_Xglobal_lock);
266 prev = &glx_displays;
267 for (priv = glx_displays; priv; prev = &priv->next, priv = priv->next) {
268 if (priv->dpy == dpy) {
273 /* Only remove the display from the list after it's destroyed. The cleanup
274 * code (e.g. driReleaseDrawables()) ends up calling __glXInitialize(),
275 * which would create a new glx_display while we're trying to destroy this
278 glx_display_free(priv);
280 _XUnlockMutex(_Xglobal_lock);
286 ** Query the version of the GLX extension. This procedure works even if
287 ** the client extension is not completely set up.
290 QueryVersion(Display * dpy, int opcode, int *major, int *minor)
293 xcb_connection_t *c = XGetXCBConnection(dpy);
294 xcb_glx_query_version_reply_t *reply = xcb_glx_query_version_reply(c,
295 xcb_glx_query_version
301 if (reply->major_version != GLX_MAJOR_VERSION) {
305 *major = reply->major_version;
306 *minor = min(reply->minor_version, GLX_MINOR_VERSION);
310 xGLXQueryVersionReq *req;
311 xGLXQueryVersionReply reply;
313 /* Send the glXQueryVersion request */
315 GetReq(GLXQueryVersion, req);
316 req->reqType = opcode;
317 req->glxCode = X_GLXQueryVersion;
318 req->majorVersion = GLX_MAJOR_VERSION;
319 req->minorVersion = GLX_MINOR_VERSION;
320 _XReply(dpy, (xReply *) & reply, 0, False);
324 if (reply.majorVersion != GLX_MAJOR_VERSION) {
326 ** The server does not support the same major release as this
331 *major = reply.majorVersion;
332 *minor = min(reply.minorVersion, GLX_MINOR_VERSION);
338 * We don't want to enable this GLX_OML_swap_method in glxext.h,
339 * because we can't support it. The X server writes it out though,
340 * so we should handle it somehow, to avoid false warnings.
343 IGNORE_GLX_SWAP_METHOD_OML = 0x8060
348 convert_from_x_visual_type(int visualType)
350 static const int glx_visual_types[] = {
351 GLX_STATIC_GRAY, GLX_GRAY_SCALE,
352 GLX_STATIC_COLOR, GLX_PSEUDO_COLOR,
353 GLX_TRUE_COLOR, GLX_DIRECT_COLOR
356 if (visualType < ARRAY_SIZE(glx_visual_types))
357 return glx_visual_types[visualType];
363 * getVisualConfigs uses the !tagged_only path.
364 * getFBConfigs uses the tagged_only path.
367 __glXInitializeVisualConfigFromTags(struct glx_config * config, int count,
368 const INT32 * bp, Bool tagged_only,
369 Bool fbconfig_style_tags)
374 /* Copy in the first set of properties */
375 config->visualID = *bp++;
377 config->visualType = convert_from_x_visual_type(*bp++);
379 config->rgbMode = *bp++;
381 config->redBits = *bp++;
382 config->greenBits = *bp++;
383 config->blueBits = *bp++;
384 config->alphaBits = *bp++;
385 config->accumRedBits = *bp++;
386 config->accumGreenBits = *bp++;
387 config->accumBlueBits = *bp++;
388 config->accumAlphaBits = *bp++;
390 config->doubleBufferMode = *bp++;
391 config->stereoMode = *bp++;
393 config->rgbBits = *bp++;
394 config->depthBits = *bp++;
395 config->stencilBits = *bp++;
396 config->numAuxBuffers = *bp++;
397 config->level = *bp++;
399 #ifdef GLX_USE_APPLEGL
400 /* AppleSGLX supports pixmap and pbuffers with all config. */
401 config->drawableType = GLX_WINDOW_BIT | GLX_PIXMAP_BIT | GLX_PBUFFER_BIT;
402 /* Unfortunately this can create an ABI compatibility problem. */
405 count -= __GLX_MIN_CONFIG_PROPS;
410 ** Additional properties may be in a list at the end
411 ** of the reply. They are in pairs of property type
412 ** and property value.
415 #define FETCH_OR_SET(tag) \
416 config-> tag = ( fbconfig_style_tags ) ? *bp++ : 1
418 for (i = 0; i < count; i += 2) {
419 long int tag = *bp++;
423 FETCH_OR_SET(rgbMode);
425 case GLX_BUFFER_SIZE:
426 config->rgbBits = *bp++;
429 config->level = *bp++;
431 case GLX_DOUBLEBUFFER:
432 FETCH_OR_SET(doubleBufferMode);
435 FETCH_OR_SET(stereoMode);
437 case GLX_AUX_BUFFERS:
438 config->numAuxBuffers = *bp++;
441 config->redBits = *bp++;
444 config->greenBits = *bp++;
447 config->blueBits = *bp++;
450 config->alphaBits = *bp++;
453 config->depthBits = *bp++;
455 case GLX_STENCIL_SIZE:
456 config->stencilBits = *bp++;
458 case GLX_ACCUM_RED_SIZE:
459 config->accumRedBits = *bp++;
461 case GLX_ACCUM_GREEN_SIZE:
462 config->accumGreenBits = *bp++;
464 case GLX_ACCUM_BLUE_SIZE:
465 config->accumBlueBits = *bp++;
467 case GLX_ACCUM_ALPHA_SIZE:
468 config->accumAlphaBits = *bp++;
470 case GLX_VISUAL_CAVEAT_EXT:
471 config->visualRating = *bp++;
473 case GLX_X_VISUAL_TYPE:
474 config->visualType = *bp++;
476 case GLX_TRANSPARENT_TYPE:
477 config->transparentPixel = *bp++;
479 case GLX_TRANSPARENT_INDEX_VALUE:
480 config->transparentIndex = *bp++;
482 case GLX_TRANSPARENT_RED_VALUE:
483 config->transparentRed = *bp++;
485 case GLX_TRANSPARENT_GREEN_VALUE:
486 config->transparentGreen = *bp++;
488 case GLX_TRANSPARENT_BLUE_VALUE:
489 config->transparentBlue = *bp++;
491 case GLX_TRANSPARENT_ALPHA_VALUE:
492 config->transparentAlpha = *bp++;
495 config->visualID = *bp++;
497 case GLX_DRAWABLE_TYPE:
498 config->drawableType = *bp++;
499 #ifdef GLX_USE_APPLEGL
500 /* AppleSGLX supports pixmap and pbuffers with all config. */
501 config->drawableType |= GLX_WINDOW_BIT | GLX_PIXMAP_BIT | GLX_PBUFFER_BIT;
504 case GLX_RENDER_TYPE:
505 config->renderType = *bp++;
507 case GLX_X_RENDERABLE:
508 config->xRenderable = *bp++;
510 case GLX_FBCONFIG_ID:
511 config->fbconfigID = *bp++;
513 case GLX_MAX_PBUFFER_WIDTH:
514 config->maxPbufferWidth = *bp++;
516 case GLX_MAX_PBUFFER_HEIGHT:
517 config->maxPbufferHeight = *bp++;
519 case GLX_MAX_PBUFFER_PIXELS:
520 config->maxPbufferPixels = *bp++;
522 #ifndef GLX_USE_APPLEGL
523 case GLX_OPTIMAL_PBUFFER_WIDTH_SGIX:
524 config->optimalPbufferWidth = *bp++;
526 case GLX_OPTIMAL_PBUFFER_HEIGHT_SGIX:
527 config->optimalPbufferHeight = *bp++;
529 case GLX_VISUAL_SELECT_GROUP_SGIX:
530 config->visualSelectGroup = *bp++;
532 case GLX_SWAP_METHOD_OML:
533 config->swapMethod = *bp++;
536 case GLX_SAMPLE_BUFFERS_SGIS:
537 config->sampleBuffers = *bp++;
539 case GLX_SAMPLES_SGIS:
540 config->samples = *bp++;
542 #ifdef GLX_USE_APPLEGL
543 case IGNORE_GLX_SWAP_METHOD_OML:
544 /* We ignore this tag. See the comment above this function. */
548 case GLX_BIND_TO_TEXTURE_RGB_EXT:
549 config->bindToTextureRgb = *bp++;
551 case GLX_BIND_TO_TEXTURE_RGBA_EXT:
552 config->bindToTextureRgba = *bp++;
554 case GLX_BIND_TO_MIPMAP_TEXTURE_EXT:
555 config->bindToMipmapTexture = *bp++;
557 case GLX_BIND_TO_TEXTURE_TARGETS_EXT:
558 config->bindToTextureTargets = *bp++;
560 case GLX_Y_INVERTED_EXT:
561 config->yInverted = *bp++;
564 case GLX_FRAMEBUFFER_SRGB_CAPABLE_EXT:
565 config->sRGBCapable = *bp++;
569 if (fbconfig_style_tags)
576 if(getenv("LIBGL_DIAGNOSTIC")) {
577 long int tagvalue = *bp++;
578 fprintf(stderr, "WARNING: unknown GLX tag from server: "
579 "tag 0x%lx value 0x%lx\n", tag, tagvalue);
581 /* Ignore the unrecognized tag's value */
589 (config->rgbMode) ? GLX_RGBA_BIT : GLX_COLOR_INDEX_BIT;
592 static struct glx_config *
593 createConfigsFromProperties(Display * dpy, int nvisuals, int nprops,
594 int screen, GLboolean tagged_only)
596 INT32 buf[__GLX_TOTAL_CONFIG], *props;
598 struct glx_config *modes, *m;
604 /* FIXME: Is the __GLX_MIN_CONFIG_PROPS test correct for FBconfigs? */
606 /* Check number of properties */
607 if (nprops < __GLX_MIN_CONFIG_PROPS || nprops > __GLX_MAX_CONFIG_PROPS)
610 /* Allocate memory for our config structure */
611 modes = glx_config_create_list(nvisuals);
615 prop_size = nprops * __GLX_SIZE_INT32;
616 if (prop_size <= sizeof(buf))
619 props = Xmalloc(prop_size);
621 /* Read each config structure and convert it into our format */
623 for (i = 0; i < nvisuals; i++) {
624 _XRead(dpy, (char *) props, prop_size);
625 #ifdef GLX_USE_APPLEGL
626 /* Older X servers don't send this so we default it here. */
627 m->drawableType = GLX_WINDOW_BIT;
630 * The XQuartz 2.3.2.1 X server doesn't set this properly, so
631 * set the proper bits here.
632 * AppleSGLX supports windows, pixmaps, and pbuffers with all config.
634 m->drawableType = GLX_WINDOW_BIT | GLX_PIXMAP_BIT | GLX_PBUFFER_BIT;
636 __glXInitializeVisualConfigFromTags(m, nprops, props,
637 tagged_only, GL_TRUE);
649 getVisualConfigs(struct glx_screen *psc,
650 struct glx_display *priv, int screen)
652 xGLXGetVisualConfigsReq *req;
653 xGLXGetVisualConfigsReply reply;
654 Display *dpy = priv->dpy;
659 GetReq(GLXGetVisualConfigs, req);
660 req->reqType = priv->majorOpcode;
661 req->glxCode = X_GLXGetVisualConfigs;
662 req->screen = screen;
664 if (!_XReply(dpy, (xReply *) & reply, 0, False))
667 psc->visuals = createConfigsFromProperties(dpy,
674 return psc->visuals != NULL;
678 getFBConfigs(struct glx_screen *psc, struct glx_display *priv, int screen)
680 xGLXGetFBConfigsReq *fb_req;
681 xGLXGetFBConfigsSGIXReq *sgi_req;
682 xGLXVendorPrivateWithReplyReq *vpreq;
683 xGLXGetFBConfigsReply reply;
684 Display *dpy = priv->dpy;
687 __glXQueryServerString(dpy, priv->majorOpcode, screen, GLX_EXTENSIONS);
692 if (atof(priv->serverGLXversion) >= 1.3) {
693 GetReq(GLXGetFBConfigs, fb_req);
694 fb_req->reqType = priv->majorOpcode;
695 fb_req->glxCode = X_GLXGetFBConfigs;
696 fb_req->screen = screen;
698 else if (strstr(psc->serverGLXexts, "GLX_SGIX_fbconfig") != NULL) {
699 GetReqExtra(GLXVendorPrivateWithReply,
700 sz_xGLXGetFBConfigsSGIXReq -
701 sz_xGLXVendorPrivateWithReplyReq, vpreq);
702 sgi_req = (xGLXGetFBConfigsSGIXReq *) vpreq;
703 sgi_req->reqType = priv->majorOpcode;
704 sgi_req->glxCode = X_GLXVendorPrivateWithReply;
705 sgi_req->vendorCode = X_GLXvop_GetFBConfigsSGIX;
706 sgi_req->screen = screen;
711 if (!_XReply(dpy, (xReply *) & reply, 0, False))
714 psc->configs = createConfigsFromProperties(dpy,
716 reply.numAttribs * 2,
721 return psc->configs != NULL;
725 glx_screen_init(struct glx_screen *psc,
726 int screen, struct glx_display * priv)
728 /* Initialize per screen dynamic client GLX extensions */
729 psc->ext_list_first_time = GL_TRUE;
731 psc->dpy = priv->dpy;
734 getVisualConfigs(psc, priv, screen);
735 getFBConfigs(psc, priv, screen);
741 glx_screen_cleanup(struct glx_screen *psc)
744 glx_config_destroy_list(psc->configs);
745 if (psc->effectiveGLXexts)
746 Xfree(psc->effectiveGLXexts);
747 psc->configs = NULL; /* NOTE: just for paranoia */
750 glx_config_destroy_list(psc->visuals);
751 psc->visuals = NULL; /* NOTE: just for paranoia */
753 Xfree((char *) psc->serverGLXexts);
757 ** Allocate the memory for the per screen configs for each screen.
758 ** If that works then fetch the per screen configs data.
761 AllocAndFetchScreenConfigs(Display * dpy, struct glx_display * priv)
763 struct glx_screen *psc;
767 ** First allocate memory for the array of per screen configs.
769 screens = ScreenCount(dpy);
770 priv->screens = Xmalloc(screens * sizeof *priv->screens);
774 priv->serverGLXversion =
775 __glXQueryServerString(dpy, priv->majorOpcode, 0, GLX_VERSION);
776 if (priv->serverGLXversion == NULL) {
777 FreeScreenConfigs(priv);
781 for (i = 0; i < screens; i++, psc++) {
783 #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
784 if (priv->dri2Display)
785 psc = (*priv->dri2Display->createScreen) (i, priv);
786 if (psc == NULL && priv->driDisplay)
787 psc = (*priv->driDisplay->createScreen) (i, priv);
788 if (psc == NULL && priv->driswDisplay)
789 psc = (*priv->driswDisplay->createScreen) (i, priv);
791 #if defined(GLX_USE_APPLEGL)
793 psc = applegl_create_screen(i, priv);
796 psc = indirect_create_screen(i, priv);
798 priv->screens[i] = psc;
805 ** Initialize the client side extension code.
807 _X_HIDDEN struct glx_display *
808 __glXInitialize(Display * dpy)
810 struct glx_display *dpyPriv, *d;
811 #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
812 Bool glx_direct, glx_accel;
816 _XLockMutex(_Xglobal_lock);
818 for (dpyPriv = glx_displays; dpyPriv; dpyPriv = dpyPriv->next) {
819 if (dpyPriv->dpy == dpy) {
820 _XUnlockMutex(_Xglobal_lock);
825 /* Drop the lock while we create the display private. */
826 _XUnlockMutex(_Xglobal_lock);
828 dpyPriv = Xcalloc(1, sizeof *dpyPriv);
832 dpyPriv->codes = XInitExtension(dpy, __glXExtensionName);
833 if (!dpyPriv->codes) {
835 _XUnlockMutex(_Xglobal_lock);
840 dpyPriv->majorOpcode = dpyPriv->codes->major_opcode;
841 dpyPriv->serverGLXvendor = 0x0;
842 dpyPriv->serverGLXversion = 0x0;
844 /* See if the versions are compatible */
845 if (!QueryVersion(dpy, dpyPriv->majorOpcode,
846 &dpyPriv->majorVersion, &dpyPriv->minorVersion)) {
848 _XUnlockMutex(_Xglobal_lock);
852 for (i = 0; i < __GLX_NUMBER_EVENTS; i++) {
853 XESetWireToEvent(dpy, dpyPriv->codes->first_event + i, __glXWireToEvent);
854 XESetEventToWire(dpy, dpyPriv->codes->first_event + i, __glXEventToWire);
857 XESetCloseDisplay(dpy, dpyPriv->codes->extension, __glXCloseDisplay);
858 XESetErrorString (dpy, dpyPriv->codes->extension,__glXErrorString);
860 dpyPriv->glXDrawHash = __glxHashCreate();
862 #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
863 glx_direct = (getenv("LIBGL_ALWAYS_INDIRECT") == NULL);
864 glx_accel = (getenv("LIBGL_ALWAYS_SOFTWARE") == NULL);
866 dpyPriv->drawHash = __glxHashCreate();
869 ** Initialize the direct rendering per display data and functions.
870 ** Note: This _must_ be done before calling any other DRI routines
871 ** (e.g., those called in AllocAndFetchScreenConfigs).
873 if (glx_direct && glx_accel) {
874 dpyPriv->dri2Display = dri2CreateDisplay(dpy);
875 dpyPriv->driDisplay = driCreateDisplay(dpy);
878 dpyPriv->driswDisplay = driswCreateDisplay(dpy);
881 #ifdef GLX_USE_APPLEGL
882 if (!applegl_create_display(dpyPriv)) {
887 if (!AllocAndFetchScreenConfigs(dpy, dpyPriv)) {
892 if (dpyPriv->majorVersion == 1 && dpyPriv->minorVersion >= 1)
893 __glXClientInfo(dpy, dpyPriv->majorOpcode);
895 /* Grab the lock again and add the dispay private, unless somebody
896 * beat us to initializing on this display in the meantime. */
897 _XLockMutex(_Xglobal_lock);
899 for (d = glx_displays; d; d = d->next) {
901 _XUnlockMutex(_Xglobal_lock);
902 glx_display_free(dpyPriv);
907 dpyPriv->next = glx_displays;
908 glx_displays = dpyPriv;
910 _XUnlockMutex(_Xglobal_lock);
916 ** Setup for sending a GLX command on dpy. Make sure the extension is
917 ** initialized. Try to avoid calling __glXInitialize as its kinda slow.
920 __glXSetupForCommand(Display * dpy)
922 struct glx_context *gc;
923 struct glx_display *priv;
925 /* If this thread has a current context, flush its rendering commands */
926 gc = __glXGetCurrentContext();
927 if (gc->currentDpy) {
928 /* Flush rendering buffer of the current context, if any */
929 (void) __glXFlushRenderBuffer(gc, gc->pc);
931 if (gc->currentDpy == dpy) {
932 /* Use opcode from gc because its right */
933 return gc->majorOpcode;
937 ** Have to get info about argument dpy because it might be to
938 ** a different server
943 /* Forced to lookup extension via the slow initialize route */
944 priv = __glXInitialize(dpy);
948 return priv->majorOpcode;
952 * Flush the drawing command transport buffer.
954 * \param ctx Context whose transport buffer is to be flushed.
955 * \param pc Pointer to first unused buffer location.
958 * Modify this function to use \c ctx->pc instead of the explicit
962 __glXFlushRenderBuffer(struct glx_context * ctx, GLubyte * pc)
964 Display *const dpy = ctx->currentDpy;
966 xcb_connection_t *c = XGetXCBConnection(dpy);
970 const GLint size = pc - ctx->buf;
972 if ((dpy != NULL) && (size > 0)) {
974 xcb_glx_render(c, ctx->currentContextTag, size,
975 (const uint8_t *) ctx->buf);
977 /* Send the entire buffer as an X request */
979 GetReq(GLXRender, req);
980 req->reqType = ctx->majorOpcode;
981 req->glxCode = X_GLXRender;
982 req->contextTag = ctx->currentContextTag;
983 req->length += (size + 3) >> 2;
984 _XSend(dpy, (char *) ctx->buf, size);
990 /* Reset pointer and return it */
997 * Send a portion of a GLXRenderLarge command to the server. The advantage of
998 * this function over \c __glXSendLargeCommand is that callers can use the
999 * data buffer in the GLX context and may be able to avoid allocating an
1000 * extra buffer. The disadvantage is the clients will have to do more
1001 * GLX protocol work (i.e., calculating \c totalRequests, etc.).
1003 * \sa __glXSendLargeCommand
1005 * \param gc GLX context
1006 * \param requestNumber Which part of the whole command is this? The first
1008 * \param totalRequests How many requests will there be?
1009 * \param data Command data.
1010 * \param dataLen Size, in bytes, of the command data.
1013 __glXSendLargeChunk(struct glx_context * gc, GLint requestNumber,
1014 GLint totalRequests, const GLvoid * data, GLint dataLen)
1016 Display *dpy = gc->currentDpy;
1018 xcb_connection_t *c = XGetXCBConnection(dpy);
1019 xcb_glx_render_large(c, gc->currentContextTag, requestNumber,
1020 totalRequests, dataLen, data);
1022 xGLXRenderLargeReq *req;
1024 if (requestNumber == 1) {
1028 GetReq(GLXRenderLarge, req);
1029 req->reqType = gc->majorOpcode;
1030 req->glxCode = X_GLXRenderLarge;
1031 req->contextTag = gc->currentContextTag;
1032 req->length += (dataLen + 3) >> 2;
1033 req->requestNumber = requestNumber;
1034 req->requestTotal = totalRequests;
1035 req->dataBytes = dataLen;
1036 Data(dpy, data, dataLen);
1038 if (requestNumber == totalRequests) {
1042 #endif /* USE_XCB */
1047 * Send a command that is too large for the GLXRender protocol request.
1049 * Send a large command, one that is too large for some reason to
1050 * send using the GLXRender protocol request. One reason to send
1051 * a large command is to avoid copying the data.
1053 * \param ctx GLX context
1054 * \param header Header data.
1055 * \param headerLen Size, in bytes, of the header data. It is assumed that
1056 * the header data will always be small enough to fit in
1057 * a single X protocol packet.
1058 * \param data Command data.
1059 * \param dataLen Size, in bytes, of the command data.
1062 __glXSendLargeCommand(struct glx_context * ctx,
1063 const GLvoid * header, GLint headerLen,
1064 const GLvoid * data, GLint dataLen)
1067 GLint totalRequests, requestNumber;
1070 ** Calculate the maximum amount of data can be stuffed into a single
1071 ** packet. sz_xGLXRenderReq is added because bufSize is the maximum
1072 ** packet size minus sz_xGLXRenderReq.
1074 maxSize = (ctx->bufSize + sz_xGLXRenderReq) - sz_xGLXRenderLargeReq;
1075 totalRequests = 1 + (dataLen / maxSize);
1076 if (dataLen % maxSize)
1080 ** Send all of the command, except the large array, as one request.
1082 assert(headerLen <= maxSize);
1083 __glXSendLargeChunk(ctx, 1, totalRequests, header, headerLen);
1086 ** Send enough requests until the whole array is sent.
1088 for (requestNumber = 2; requestNumber <= (totalRequests - 1);
1090 __glXSendLargeChunk(ctx, requestNumber, totalRequests, data, maxSize);
1091 data = (const GLvoid *) (((const GLubyte *) data) + maxSize);
1093 assert(dataLen > 0);
1096 assert(dataLen <= maxSize);
1097 __glXSendLargeChunk(ctx, requestNumber, totalRequests, data, dataLen);
1100 /************************************************************************/
1104 __glXDumpDrawBuffer(struct glx_context * ctx)
1106 GLubyte *p = ctx->buf;
1107 GLubyte *end = ctx->pc;
1108 GLushort opcode, length;
1112 opcode = *((GLushort *) p);
1113 length = *((GLushort *) (p + 2));
1114 printf("%2x: %5d: ", opcode, length);
1117 while (length > 0) {
1118 printf("%08x ", *((unsigned *) p));