2 * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
3 * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
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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 #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 const char __glXExtensionName[] = GLX_EXTENSION_NAME;
72 static __GLXdisplayPrivate *glx_displays;
74 static /* const */ char *error_list[] = {
80 "GLXBadCurrentWindow",
81 "GLXBadRenderRequest",
83 "GLXUnsupportedPrivateRequest",
86 "GLXBadCurrentDrawable",
90 #ifdef GLX_USE_APPLEGL
91 static char *__glXErrorString(Display *dpy, int code, XExtCodes *codes,
96 XEXT_GENERATE_ERROR_STRING(__glXErrorString, __glXExtensionName,
97 __GLX_NUMBER_ERRORS, error_list)
100 __glXCloseDisplay(Display * dpy, XExtCodes * codes);
102 __glXWireToEvent(Display *dpy, XEvent *event, xEvent *wire);
104 __glXEventToWire(Display *dpy, XEvent *event, xEvent *wire);
107 * GLX events are a bit funky. We don't stuff the X event code into
108 * our user exposed (via XNextEvent) structure. Instead we use the GLX
109 * private event code namespace (and hope it doesn't conflict). Clients
110 * have to know that bit 15 in the event type field means they're getting
111 * a GLX event, and then handle the various sub-event types there, rather
112 * than simply checking the event code and handling it directly.
116 __glXWireToEvent(Display *dpy, XEvent *event, xEvent *wire)
118 __GLXdisplayPrivate *glx_dpy = __glXInitialize(dpy);
123 switch ((wire->u.u.type & 0x7f) - glx_dpy->codes->first_event) {
124 case GLX_PbufferClobber:
126 GLXPbufferClobberEvent *aevent = (GLXPbufferClobberEvent *)event;
127 xGLXPbufferClobberEvent *awire = (xGLXPbufferClobberEvent *)wire;
128 aevent->event_type = awire->type;
129 aevent->serial = awire->sequenceNumber;
130 aevent->event_type = awire->event_type;
131 aevent->draw_type = awire->draw_type;
132 aevent->drawable = awire->drawable;
133 aevent->buffer_mask = awire->buffer_mask;
134 aevent->aux_buffer = awire->aux_buffer;
135 aevent->x = awire->x;
136 aevent->y = awire->y;
137 aevent->width = awire->width;
138 aevent->height = awire->height;
139 aevent->count = awire->count;
142 /* No easy symbol to test for this, as GLX_BufferSwapComplete is
143 * defined in the local glx.h header, but the
144 * xGLXBufferSwapComplete typedef is only available in new versions
145 * of the external glxproto.h header, which doesn't have any
146 * testable versioning define.
148 * I'll use the related DRI2 define, in the hope that we won't
149 * receive these events unless we know how to ask for them:
151 #ifdef X_DRI2SwapBuffers
152 case GLX_BufferSwapComplete:
154 GLXBufferSwapComplete *aevent = (GLXBufferSwapComplete *)event;
155 xGLXBufferSwapComplete *awire = (xGLXBufferSwapComplete *)wire;
156 aevent->event_type = awire->event_type;
157 aevent->drawable = awire->drawable;
158 aevent->ust = ((CARD64)awire->ust_hi << 32) | awire->ust_lo;
159 aevent->msc = ((CARD64)awire->msc_hi << 32) | awire->msc_lo;
160 aevent->sbc = ((CARD64)awire->sbc_hi << 32) | awire->sbc_lo;
165 /* client doesn't support server event */
172 /* We don't actually support this. It doesn't make sense for clients to
173 * send each other GLX events.
176 __glXEventToWire(Display *dpy, XEvent *event, xEvent *wire)
178 __GLXdisplayPrivate *glx_dpy = __glXInitialize(dpy);
183 switch (event->type) {
188 case GLX_EXCHANGE_COMPLETE_INTEL:
190 case GLX_COPY_COMPLETE_INTEL:
192 case GLX_FLIP_COMPLETE_INTEL:
195 /* client doesn't support server event */
202 /************************************************************************/
204 ** Free the per screen configs data as well as the array of
205 ** __glXScreenConfigs.
208 FreeScreenConfigs(__GLXdisplayPrivate * priv)
210 __GLXscreenConfigs *psc;
213 /* Free screen configuration information */
214 screens = ScreenCount(priv->dpy);
215 for (i = 0; i < screens; i++) {
216 psc = priv->screenConfigs[i];
218 _gl_context_modes_destroy(psc->configs);
219 if (psc->effectiveGLXexts)
220 Xfree(psc->effectiveGLXexts);
221 psc->configs = NULL; /* NOTE: just for paranoia */
224 _gl_context_modes_destroy(psc->visuals);
225 psc->visuals = NULL; /* NOTE: just for paranoia */
227 Xfree((char *) psc->serverGLXexts);
229 #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
230 if (psc->driScreen) {
231 psc->driScreen->destroyScreen(psc);
239 XFree((char *) priv->screenConfigs);
240 priv->screenConfigs = NULL;
244 ** Release the private memory referred to in a display private
245 ** structure. The caller will free the extension structure.
248 __glXCloseDisplay(Display * dpy, XExtCodes * codes)
250 __GLXdisplayPrivate *priv, **prev;
253 _XLockMutex(_Xglobal_lock);
254 prev = &glx_displays;
255 for (priv = glx_displays; priv; prev = &priv->next, priv = priv->next) {
256 if (priv->dpy == dpy) {
257 (*prev)->next = priv->next;
261 _XUnlockMutex(_Xglobal_lock);
263 gc = __glXGetCurrentContext();
264 if (dpy == gc->currentDpy) {
265 gc->vtable->destroy(gc);
266 __glXSetCurrentContextNull();
269 FreeScreenConfigs(priv);
270 if (priv->serverGLXvendor)
271 Xfree((char *) priv->serverGLXvendor);
272 if (priv->serverGLXversion)
273 Xfree((char *) priv->serverGLXversion);
275 __glxHashDestroy(priv->drawHash);
277 #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
278 /* Free the direct rendering per display data */
279 if (priv->driswDisplay)
280 (*priv->driswDisplay->destroyDisplay) (priv->driswDisplay);
281 priv->driswDisplay = NULL;
283 if (priv->driDisplay)
284 (*priv->driDisplay->destroyDisplay) (priv->driDisplay);
285 priv->driDisplay = NULL;
287 if (priv->dri2Display)
288 (*priv->dri2Display->destroyDisplay) (priv->dri2Display);
289 priv->dri2Display = NULL;
292 Xfree((char *) priv);
298 ** Query the version of the GLX extension. This procedure works even if
299 ** the client extension is not completely set up.
302 QueryVersion(Display * dpy, int opcode, int *major, int *minor)
305 xcb_connection_t *c = XGetXCBConnection(dpy);
306 xcb_glx_query_version_reply_t *reply = xcb_glx_query_version_reply(c,
307 xcb_glx_query_version
313 if (reply->major_version != GLX_MAJOR_VERSION) {
317 *major = reply->major_version;
318 *minor = min(reply->minor_version, GLX_MINOR_VERSION);
322 xGLXQueryVersionReq *req;
323 xGLXQueryVersionReply reply;
325 /* Send the glXQueryVersion request */
327 GetReq(GLXQueryVersion, req);
328 req->reqType = opcode;
329 req->glxCode = X_GLXQueryVersion;
330 req->majorVersion = GLX_MAJOR_VERSION;
331 req->minorVersion = GLX_MINOR_VERSION;
332 _XReply(dpy, (xReply *) & reply, 0, False);
336 if (reply.majorVersion != GLX_MAJOR_VERSION) {
338 ** The server does not support the same major release as this
343 *major = reply.majorVersion;
344 *minor = min(reply.minorVersion, GLX_MINOR_VERSION);
350 * We don't want to enable this GLX_OML_swap_method in glxext.h,
351 * because we can't support it. The X server writes it out though,
352 * so we should handle it somehow, to avoid false warnings.
355 IGNORE_GLX_SWAP_METHOD_OML = 0x8060
360 * getVisualConfigs uses the !tagged_only path.
361 * getFBConfigs uses the tagged_only path.
364 __glXInitializeVisualConfigFromTags(__GLcontextModes * config, int count,
365 const INT32 * bp, Bool tagged_only,
366 Bool fbconfig_style_tags)
371 /* Copy in the first set of properties */
372 config->visualID = *bp++;
374 config->visualType = _gl_convert_from_x_visual_type(*bp++);
376 config->rgbMode = *bp++;
378 config->redBits = *bp++;
379 config->greenBits = *bp++;
380 config->blueBits = *bp++;
381 config->alphaBits = *bp++;
382 config->accumRedBits = *bp++;
383 config->accumGreenBits = *bp++;
384 config->accumBlueBits = *bp++;
385 config->accumAlphaBits = *bp++;
387 config->doubleBufferMode = *bp++;
388 config->stereoMode = *bp++;
390 config->rgbBits = *bp++;
391 config->depthBits = *bp++;
392 config->stencilBits = *bp++;
393 config->numAuxBuffers = *bp++;
394 config->level = *bp++;
396 #ifdef GLX_USE_APPLEGL
397 /* AppleSGLX supports pixmap and pbuffers with all config. */
398 config->drawableType = GLX_WINDOW_BIT | GLX_PIXMAP_BIT | GLX_PBUFFER_BIT;
399 /* Unfortunately this can create an ABI compatibility problem. */
402 count -= __GLX_MIN_CONFIG_PROPS;
407 ** Additional properties may be in a list at the end
408 ** of the reply. They are in pairs of property type
409 ** and property value.
412 #define FETCH_OR_SET(tag) \
413 config-> tag = ( fbconfig_style_tags ) ? *bp++ : 1
415 for (i = 0; i < count; i += 2) {
416 long int tag = *bp++;
420 FETCH_OR_SET(rgbMode);
422 case GLX_BUFFER_SIZE:
423 config->rgbBits = *bp++;
426 config->level = *bp++;
428 case GLX_DOUBLEBUFFER:
429 FETCH_OR_SET(doubleBufferMode);
432 FETCH_OR_SET(stereoMode);
434 case GLX_AUX_BUFFERS:
435 config->numAuxBuffers = *bp++;
438 config->redBits = *bp++;
441 config->greenBits = *bp++;
444 config->blueBits = *bp++;
447 config->alphaBits = *bp++;
450 config->depthBits = *bp++;
452 case GLX_STENCIL_SIZE:
453 config->stencilBits = *bp++;
455 case GLX_ACCUM_RED_SIZE:
456 config->accumRedBits = *bp++;
458 case GLX_ACCUM_GREEN_SIZE:
459 config->accumGreenBits = *bp++;
461 case GLX_ACCUM_BLUE_SIZE:
462 config->accumBlueBits = *bp++;
464 case GLX_ACCUM_ALPHA_SIZE:
465 config->accumAlphaBits = *bp++;
467 case GLX_VISUAL_CAVEAT_EXT:
468 config->visualRating = *bp++;
470 case GLX_X_VISUAL_TYPE:
471 config->visualType = *bp++;
473 case GLX_TRANSPARENT_TYPE:
474 config->transparentPixel = *bp++;
476 case GLX_TRANSPARENT_INDEX_VALUE:
477 config->transparentIndex = *bp++;
479 case GLX_TRANSPARENT_RED_VALUE:
480 config->transparentRed = *bp++;
482 case GLX_TRANSPARENT_GREEN_VALUE:
483 config->transparentGreen = *bp++;
485 case GLX_TRANSPARENT_BLUE_VALUE:
486 config->transparentBlue = *bp++;
488 case GLX_TRANSPARENT_ALPHA_VALUE:
489 config->transparentAlpha = *bp++;
492 config->visualID = *bp++;
494 case GLX_DRAWABLE_TYPE:
495 config->drawableType = *bp++;
496 #ifdef GLX_USE_APPLEGL
497 /* AppleSGLX supports pixmap and pbuffers with all config. */
498 config->drawableType |= GLX_WINDOW_BIT | GLX_PIXMAP_BIT | GLX_PBUFFER_BIT;
501 case GLX_RENDER_TYPE:
502 config->renderType = *bp++;
504 case GLX_X_RENDERABLE:
505 config->xRenderable = *bp++;
507 case GLX_FBCONFIG_ID:
508 config->fbconfigID = *bp++;
510 case GLX_MAX_PBUFFER_WIDTH:
511 config->maxPbufferWidth = *bp++;
513 case GLX_MAX_PBUFFER_HEIGHT:
514 config->maxPbufferHeight = *bp++;
516 case GLX_MAX_PBUFFER_PIXELS:
517 config->maxPbufferPixels = *bp++;
519 #ifndef GLX_USE_APPLEGL
520 case GLX_OPTIMAL_PBUFFER_WIDTH_SGIX:
521 config->optimalPbufferWidth = *bp++;
523 case GLX_OPTIMAL_PBUFFER_HEIGHT_SGIX:
524 config->optimalPbufferHeight = *bp++;
526 case GLX_VISUAL_SELECT_GROUP_SGIX:
527 config->visualSelectGroup = *bp++;
529 case GLX_SWAP_METHOD_OML:
530 config->swapMethod = *bp++;
533 case GLX_SAMPLE_BUFFERS_SGIS:
534 config->sampleBuffers = *bp++;
536 case GLX_SAMPLES_SGIS:
537 config->samples = *bp++;
539 #ifdef GLX_USE_APPLEGL
540 case IGNORE_GLX_SWAP_METHOD_OML:
541 /* We ignore this tag. See the comment above this function. */
545 case GLX_BIND_TO_TEXTURE_RGB_EXT:
546 config->bindToTextureRgb = *bp++;
548 case GLX_BIND_TO_TEXTURE_RGBA_EXT:
549 config->bindToTextureRgba = *bp++;
551 case GLX_BIND_TO_MIPMAP_TEXTURE_EXT:
552 config->bindToMipmapTexture = *bp++;
554 case GLX_BIND_TO_TEXTURE_TARGETS_EXT:
555 config->bindToTextureTargets = *bp++;
557 case GLX_Y_INVERTED_EXT:
558 config->yInverted = *bp++;
562 if (fbconfig_style_tags)
569 if(getenv("LIBGL_DIAGNOSTIC")) {
570 long int tagvalue = *bp++;
571 fprintf(stderr, "WARNING: unknown GLX tag from server: "
572 "tag 0x%lx value 0x%lx\n", tag, tagvalue);
574 /* Ignore the unrecognized tag's value */
582 (config->rgbMode) ? GLX_RGBA_BIT : GLX_COLOR_INDEX_BIT;
584 config->haveAccumBuffer = ((config->accumRedBits +
585 config->accumGreenBits +
586 config->accumBlueBits +
587 config->accumAlphaBits) > 0);
588 config->haveDepthBuffer = (config->depthBits > 0);
589 config->haveStencilBuffer = (config->stencilBits > 0);
592 static __GLcontextModes *
593 createConfigsFromProperties(Display * dpy, int nvisuals, int nprops,
594 int screen, GLboolean tagged_only)
596 INT32 buf[__GLX_TOTAL_CONFIG], *props;
598 __GLcontextModes *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 = _gl_context_modes_create(nvisuals, sizeof(__GLcontextModes));
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(__GLXscreenConfigs *psc,
650 __GLXdisplayPrivate *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(__GLXscreenConfigs *psc, __GLXdisplayPrivate *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(__GLXscreenConfigs *psc,
726 int screen, __GLXdisplayPrivate * 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 ** Allocate the memory for the per screen configs for each screen.
742 ** If that works then fetch the per screen configs data.
745 AllocAndFetchScreenConfigs(Display * dpy, __GLXdisplayPrivate * priv)
747 __GLXscreenConfigs *psc;
751 ** First allocate memory for the array of per screen configs.
753 screens = ScreenCount(dpy);
754 priv->screenConfigs = Xmalloc(screens * sizeof *priv->screenConfigs);
755 if (!priv->screenConfigs)
758 priv->serverGLXversion =
759 __glXQueryServerString(dpy, priv->majorOpcode, 0, GLX_VERSION);
760 if (priv->serverGLXversion == NULL) {
761 FreeScreenConfigs(priv);
765 for (i = 0; i < screens; i++, psc++) {
767 #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
768 if (priv->dri2Display)
769 psc = (*priv->dri2Display->createScreen) (i, priv);
770 if (psc == NULL && priv->driDisplay)
771 psc = (*priv->driDisplay->createScreen) (i, priv);
772 if (psc == NULL && priv->driswDisplay)
773 psc = (*priv->driswDisplay->createScreen) (i, priv);
776 psc = indirect_create_screen(i, priv);
777 priv->screenConfigs[i] = psc;
784 ** Initialize the client side extension code.
786 _X_HIDDEN __GLXdisplayPrivate *
787 __glXInitialize(Display * dpy)
789 __GLXdisplayPrivate *dpyPriv;
790 #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
791 Bool glx_direct, glx_accel;
795 _XLockMutex(_Xglobal_lock);
797 for (dpyPriv = glx_displays; dpyPriv; dpyPriv = dpyPriv->next) {
798 if (dpyPriv->dpy == dpy) {
799 _XUnlockMutex(_Xglobal_lock);
804 dpyPriv = Xcalloc(1, sizeof *dpyPriv);
808 dpyPriv->codes = XInitExtension(dpy, __glXExtensionName);
809 if (!dpyPriv->codes) {
811 _XUnlockMutex(_Xglobal_lock);
816 dpyPriv->majorOpcode = dpyPriv->codes->major_opcode;
817 dpyPriv->serverGLXvendor = 0x0;
818 dpyPriv->serverGLXversion = 0x0;
820 /* See if the versions are compatible */
821 if (!QueryVersion(dpy, dpyPriv->majorOpcode,
822 &dpyPriv->majorVersion, &dpyPriv->minorVersion)) {
824 _XUnlockMutex(_Xglobal_lock);
828 for (i = 0; i < __GLX_NUMBER_EVENTS; i++) {
829 XESetWireToEvent(dpy, dpyPriv->codes->first_event + i, __glXWireToEvent);
830 XESetEventToWire(dpy, dpyPriv->codes->first_event + i, __glXEventToWire);
833 XESetCloseDisplay(dpy, dpyPriv->codes->extension, __glXCloseDisplay);
834 XESetErrorString (dpy, dpyPriv->codes->extension,__glXErrorString);
836 #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
837 glx_direct = (getenv("LIBGL_ALWAYS_INDIRECT") == NULL);
838 glx_accel = (getenv("LIBGL_ALWAYS_SOFTWARE") == NULL);
840 dpyPriv->drawHash = __glxHashCreate();
843 ** Initialize the direct rendering per display data and functions.
844 ** Note: This _must_ be done before calling any other DRI routines
845 ** (e.g., those called in AllocAndFetchScreenConfigs).
847 if (glx_direct && glx_accel) {
848 dpyPriv->dri2Display = dri2CreateDisplay(dpy);
849 dpyPriv->driDisplay = driCreateDisplay(dpy);
852 dpyPriv->driswDisplay = driswCreateDisplay(dpy);
855 #ifdef GLX_USE_APPLEGL
856 if (apple_init_glx(dpy)) {
861 if (!AllocAndFetchScreenConfigs(dpy, dpyPriv)) {
866 if (dpyPriv->majorVersion == 1 && dpyPriv->minorVersion >= 1)
867 __glXClientInfo(dpy, dpyPriv->majorOpcode);
869 dpyPriv->next = glx_displays;
870 glx_displays = dpyPriv;
872 _XUnlockMutex(_Xglobal_lock);
878 ** Setup for sending a GLX command on dpy. Make sure the extension is
879 ** initialized. Try to avoid calling __glXInitialize as its kinda slow.
882 __glXSetupForCommand(Display * dpy)
885 __GLXdisplayPrivate *priv;
887 /* If this thread has a current context, flush its rendering commands */
888 gc = __glXGetCurrentContext();
889 if (gc->currentDpy) {
890 /* Flush rendering buffer of the current context, if any */
891 (void) __glXFlushRenderBuffer(gc, gc->pc);
893 if (gc->currentDpy == dpy) {
894 /* Use opcode from gc because its right */
895 return gc->majorOpcode;
899 ** Have to get info about argument dpy because it might be to
900 ** a different server
905 /* Forced to lookup extension via the slow initialize route */
906 priv = __glXInitialize(dpy);
910 return priv->majorOpcode;
914 * Flush the drawing command transport buffer.
916 * \param ctx Context whose transport buffer is to be flushed.
917 * \param pc Pointer to first unused buffer location.
920 * Modify this function to use \c ctx->pc instead of the explicit
924 __glXFlushRenderBuffer(__GLXcontext * ctx, GLubyte * pc)
926 Display *const dpy = ctx->currentDpy;
928 xcb_connection_t *c = XGetXCBConnection(dpy);
932 const GLint size = pc - ctx->buf;
934 if ((dpy != NULL) && (size > 0)) {
936 xcb_glx_render(c, ctx->currentContextTag, size,
937 (const uint8_t *) ctx->buf);
939 /* Send the entire buffer as an X request */
941 GetReq(GLXRender, req);
942 req->reqType = ctx->majorOpcode;
943 req->glxCode = X_GLXRender;
944 req->contextTag = ctx->currentContextTag;
945 req->length += (size + 3) >> 2;
946 _XSend(dpy, (char *) ctx->buf, size);
952 /* Reset pointer and return it */
959 * Send a portion of a GLXRenderLarge command to the server. The advantage of
960 * this function over \c __glXSendLargeCommand is that callers can use the
961 * data buffer in the GLX context and may be able to avoid allocating an
962 * extra buffer. The disadvantage is the clients will have to do more
963 * GLX protocol work (i.e., calculating \c totalRequests, etc.).
965 * \sa __glXSendLargeCommand
967 * \param gc GLX context
968 * \param requestNumber Which part of the whole command is this? The first
970 * \param totalRequests How many requests will there be?
971 * \param data Command data.
972 * \param dataLen Size, in bytes, of the command data.
975 __glXSendLargeChunk(__GLXcontext * gc, GLint requestNumber,
976 GLint totalRequests, const GLvoid * data, GLint dataLen)
978 Display *dpy = gc->currentDpy;
980 xcb_connection_t *c = XGetXCBConnection(dpy);
981 xcb_glx_render_large(c, gc->currentContextTag, requestNumber,
982 totalRequests, dataLen, data);
984 xGLXRenderLargeReq *req;
986 if (requestNumber == 1) {
990 GetReq(GLXRenderLarge, req);
991 req->reqType = gc->majorOpcode;
992 req->glxCode = X_GLXRenderLarge;
993 req->contextTag = gc->currentContextTag;
994 req->length += (dataLen + 3) >> 2;
995 req->requestNumber = requestNumber;
996 req->requestTotal = totalRequests;
997 req->dataBytes = dataLen;
998 Data(dpy, data, dataLen);
1000 if (requestNumber == totalRequests) {
1004 #endif /* USE_XCB */
1009 * Send a command that is too large for the GLXRender protocol request.
1011 * Send a large command, one that is too large for some reason to
1012 * send using the GLXRender protocol request. One reason to send
1013 * a large command is to avoid copying the data.
1015 * \param ctx GLX context
1016 * \param header Header data.
1017 * \param headerLen Size, in bytes, of the header data. It is assumed that
1018 * the header data will always be small enough to fit in
1019 * a single X protocol packet.
1020 * \param data Command data.
1021 * \param dataLen Size, in bytes, of the command data.
1024 __glXSendLargeCommand(__GLXcontext * ctx,
1025 const GLvoid * header, GLint headerLen,
1026 const GLvoid * data, GLint dataLen)
1029 GLint totalRequests, requestNumber;
1032 ** Calculate the maximum amount of data can be stuffed into a single
1033 ** packet. sz_xGLXRenderReq is added because bufSize is the maximum
1034 ** packet size minus sz_xGLXRenderReq.
1036 maxSize = (ctx->bufSize + sz_xGLXRenderReq) - sz_xGLXRenderLargeReq;
1037 totalRequests = 1 + (dataLen / maxSize);
1038 if (dataLen % maxSize)
1042 ** Send all of the command, except the large array, as one request.
1044 assert(headerLen <= maxSize);
1045 __glXSendLargeChunk(ctx, 1, totalRequests, header, headerLen);
1048 ** Send enough requests until the whole array is sent.
1050 for (requestNumber = 2; requestNumber <= (totalRequests - 1);
1052 __glXSendLargeChunk(ctx, requestNumber, totalRequests, data, maxSize);
1053 data = (const GLvoid *) (((const GLubyte *) data) + maxSize);
1055 assert(dataLen > 0);
1058 assert(dataLen <= maxSize);
1059 __glXSendLargeChunk(ctx, requestNumber, totalRequests, data, dataLen);
1062 /************************************************************************/
1066 __glXDumpDrawBuffer(__GLXcontext * ctx)
1068 GLubyte *p = ctx->buf;
1069 GLubyte *end = ctx->pc;
1070 GLushort opcode, length;
1074 opcode = *((GLushort *) p);
1075 length = *((GLushort *) (p + 2));
1076 printf("%2x: %5d: ", opcode, length);
1079 while (length > 0) {
1080 printf("%08x ", *((unsigned *) p));