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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18 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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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.
26 * shall not be used in advertising or otherwise to promote the sale, use or
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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 * GLX events are a bit funky. We don't stuff the X event code into
101 * our user exposed (via XNextEvent) structure. Instead we use the GLX
102 * private event code namespace (and hope it doesn't conflict). Clients
103 * have to know that bit 15 in the event type field means they're getting
104 * a GLX event, and then handle the various sub-event types there, rather
105 * than simply checking the event code and handling it directly.
109 __glXWireToEvent(Display *dpy, XEvent *event, xEvent *wire)
111 __GLXdisplayPrivate *glx_dpy = __glXInitialize(dpy);
116 switch ((wire->u.u.type & 0x7f) - glx_dpy->codes->first_event) {
117 case GLX_PbufferClobber:
119 GLXPbufferClobberEvent *aevent = (GLXPbufferClobberEvent *)event;
120 xGLXPbufferClobberEvent *awire = (xGLXPbufferClobberEvent *)wire;
121 aevent->event_type = awire->type;
122 aevent->serial = awire->sequenceNumber;
123 aevent->event_type = awire->event_type;
124 aevent->draw_type = awire->draw_type;
125 aevent->drawable = awire->drawable;
126 aevent->buffer_mask = awire->buffer_mask;
127 aevent->aux_buffer = awire->aux_buffer;
128 aevent->x = awire->x;
129 aevent->y = awire->y;
130 aevent->width = awire->width;
131 aevent->height = awire->height;
132 aevent->count = awire->count;
135 /* No easy symbol to test for this, as GLX_BufferSwapComplete is
136 * defined in the local glx.h header, but the
137 * xGLXBufferSwapComplete typedef is only available in new versions
138 * of the external glxproto.h header, which doesn't have any
139 * testable versioning define.
141 * I'll use the related DRI2 define, in the hope that we won't
142 * receive these events unless we know how to ask for them:
144 #ifdef X_DRI2SwapBuffers
145 case GLX_BufferSwapComplete:
147 GLXBufferSwapComplete *aevent = (GLXBufferSwapComplete *)event;
148 xGLXBufferSwapComplete *awire = (xGLXBufferSwapComplete *)wire;
149 aevent->event_type = awire->event_type;
150 aevent->drawable = awire->drawable;
151 aevent->ust = ((CARD64)awire->ust_hi << 32) | awire->ust_lo;
152 aevent->msc = ((CARD64)awire->msc_hi << 32) | awire->msc_lo;
153 aevent->sbc = ((CARD64)awire->sbc_hi << 32) | awire->sbc_lo;
158 /* client doesn't support server event */
165 /* We don't actually support this. It doesn't make sense for clients to
166 * send each other GLX events.
169 __glXEventToWire(Display *dpy, XEvent *event, xEvent *wire)
171 __GLXdisplayPrivate *glx_dpy = __glXInitialize(dpy);
176 switch (event->type) {
181 case GLX_EXCHANGE_COMPLETE_INTEL:
183 case GLX_COPY_COMPLETE_INTEL:
185 case GLX_FLIP_COMPLETE_INTEL:
188 /* client doesn't support server event */
195 /************************************************************************/
197 ** Free the per screen configs data as well as the array of
198 ** __glXScreenConfigs.
201 FreeScreenConfigs(__GLXdisplayPrivate * priv)
203 __GLXscreenConfigs *psc;
206 /* Free screen configuration information */
207 screens = ScreenCount(priv->dpy);
208 for (i = 0; i < screens; i++) {
209 psc = priv->screenConfigs[i];
211 _gl_context_modes_destroy(psc->configs);
212 if (psc->effectiveGLXexts)
213 Xfree(psc->effectiveGLXexts);
214 psc->configs = NULL; /* NOTE: just for paranoia */
217 _gl_context_modes_destroy(psc->visuals);
218 psc->visuals = NULL; /* NOTE: just for paranoia */
220 Xfree((char *) psc->serverGLXexts);
222 #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
223 if (psc->driScreen) {
224 psc->driScreen->destroyScreen(psc);
232 XFree((char *) priv->screenConfigs);
233 priv->screenConfigs = NULL;
237 ** Release the private memory referred to in a display private
238 ** structure. The caller will free the extension structure.
241 __glXCloseDisplay(Display * dpy, XExtCodes * codes)
243 __GLXdisplayPrivate *priv, **prev;
246 _XLockMutex(_Xglobal_lock);
247 prev = &glx_displays;
248 for (priv = glx_displays; priv; prev = &priv->next, priv = priv->next) {
249 if (priv->dpy == dpy) {
250 (*prev)->next = priv->next;
254 _XUnlockMutex(_Xglobal_lock);
256 gc = __glXGetCurrentContext();
257 if (dpy == gc->currentDpy) {
258 gc->vtable->destroy(gc);
259 __glXSetCurrentContextNull();
262 FreeScreenConfigs(priv);
263 if (priv->serverGLXvendor)
264 Xfree((char *) priv->serverGLXvendor);
265 if (priv->serverGLXversion)
266 Xfree((char *) priv->serverGLXversion);
268 __glxHashDestroy(priv->drawHash);
270 #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
271 /* Free the direct rendering per display data */
272 if (priv->driswDisplay)
273 (*priv->driswDisplay->destroyDisplay) (priv->driswDisplay);
274 priv->driswDisplay = NULL;
276 if (priv->driDisplay)
277 (*priv->driDisplay->destroyDisplay) (priv->driDisplay);
278 priv->driDisplay = NULL;
280 if (priv->dri2Display)
281 (*priv->dri2Display->destroyDisplay) (priv->dri2Display);
282 priv->dri2Display = NULL;
285 Xfree((char *) priv);
291 ** Query the version of the GLX extension. This procedure works even if
292 ** the client extension is not completely set up.
295 QueryVersion(Display * dpy, int opcode, int *major, int *minor)
298 xcb_connection_t *c = XGetXCBConnection(dpy);
299 xcb_glx_query_version_reply_t *reply = xcb_glx_query_version_reply(c,
300 xcb_glx_query_version
306 if (reply->major_version != GLX_MAJOR_VERSION) {
310 *major = reply->major_version;
311 *minor = min(reply->minor_version, GLX_MINOR_VERSION);
315 xGLXQueryVersionReq *req;
316 xGLXQueryVersionReply reply;
318 /* Send the glXQueryVersion request */
320 GetReq(GLXQueryVersion, req);
321 req->reqType = opcode;
322 req->glxCode = X_GLXQueryVersion;
323 req->majorVersion = GLX_MAJOR_VERSION;
324 req->minorVersion = GLX_MINOR_VERSION;
325 _XReply(dpy, (xReply *) & reply, 0, False);
329 if (reply.majorVersion != GLX_MAJOR_VERSION) {
331 ** The server does not support the same major release as this
336 *major = reply.majorVersion;
337 *minor = min(reply.minorVersion, GLX_MINOR_VERSION);
343 * We don't want to enable this GLX_OML_swap_method in glxext.h,
344 * because we can't support it. The X server writes it out though,
345 * so we should handle it somehow, to avoid false warnings.
348 IGNORE_GLX_SWAP_METHOD_OML = 0x8060
353 * getVisualConfigs uses the !tagged_only path.
354 * getFBConfigs uses the tagged_only path.
357 __glXInitializeVisualConfigFromTags(__GLcontextModes * 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 = _gl_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++;
555 if (fbconfig_style_tags)
562 if(getenv("LIBGL_DIAGNOSTIC")) {
563 long int tagvalue = *bp++;
564 fprintf(stderr, "WARNING: unknown GLX tag from server: "
565 "tag 0x%lx value 0x%lx\n", tag, tagvalue);
567 /* Ignore the unrecognized tag's value */
575 (config->rgbMode) ? GLX_RGBA_BIT : GLX_COLOR_INDEX_BIT;
577 config->haveAccumBuffer = ((config->accumRedBits +
578 config->accumGreenBits +
579 config->accumBlueBits +
580 config->accumAlphaBits) > 0);
581 config->haveDepthBuffer = (config->depthBits > 0);
582 config->haveStencilBuffer = (config->stencilBits > 0);
585 static __GLcontextModes *
586 createConfigsFromProperties(Display * dpy, int nvisuals, int nprops,
587 int screen, GLboolean tagged_only)
589 INT32 buf[__GLX_TOTAL_CONFIG], *props;
591 __GLcontextModes *modes, *m;
597 /* FIXME: Is the __GLX_MIN_CONFIG_PROPS test correct for FBconfigs? */
599 /* Check number of properties */
600 if (nprops < __GLX_MIN_CONFIG_PROPS || nprops > __GLX_MAX_CONFIG_PROPS)
603 /* Allocate memory for our config structure */
604 modes = _gl_context_modes_create(nvisuals, sizeof(__GLcontextModes));
608 prop_size = nprops * __GLX_SIZE_INT32;
609 if (prop_size <= sizeof(buf))
612 props = Xmalloc(prop_size);
614 /* Read each config structure and convert it into our format */
616 for (i = 0; i < nvisuals; i++) {
617 _XRead(dpy, (char *) props, prop_size);
618 #ifdef GLX_USE_APPLEGL
619 /* Older X servers don't send this so we default it here. */
620 m->drawableType = GLX_WINDOW_BIT;
623 * The XQuartz 2.3.2.1 X server doesn't set this properly, so
624 * set the proper bits here.
625 * AppleSGLX supports windows, pixmaps, and pbuffers with all config.
627 m->drawableType = GLX_WINDOW_BIT | GLX_PIXMAP_BIT | GLX_PBUFFER_BIT;
629 __glXInitializeVisualConfigFromTags(m, nprops, props,
630 tagged_only, GL_TRUE);
642 getVisualConfigs(__GLXscreenConfigs *psc,
643 __GLXdisplayPrivate *priv, int screen)
645 xGLXGetVisualConfigsReq *req;
646 xGLXGetVisualConfigsReply reply;
647 Display *dpy = priv->dpy;
652 GetReq(GLXGetVisualConfigs, req);
653 req->reqType = priv->majorOpcode;
654 req->glxCode = X_GLXGetVisualConfigs;
655 req->screen = screen;
657 if (!_XReply(dpy, (xReply *) & reply, 0, False))
660 psc->visuals = createConfigsFromProperties(dpy,
667 return psc->visuals != NULL;
671 getFBConfigs(__GLXscreenConfigs *psc, __GLXdisplayPrivate *priv, int screen)
673 xGLXGetFBConfigsReq *fb_req;
674 xGLXGetFBConfigsSGIXReq *sgi_req;
675 xGLXVendorPrivateWithReplyReq *vpreq;
676 xGLXGetFBConfigsReply reply;
677 Display *dpy = priv->dpy;
680 __glXQueryServerString(dpy, priv->majorOpcode, screen, GLX_EXTENSIONS);
685 if (atof(priv->serverGLXversion) >= 1.3) {
686 GetReq(GLXGetFBConfigs, fb_req);
687 fb_req->reqType = priv->majorOpcode;
688 fb_req->glxCode = X_GLXGetFBConfigs;
689 fb_req->screen = screen;
691 else if (strstr(psc->serverGLXexts, "GLX_SGIX_fbconfig") != NULL) {
692 GetReqExtra(GLXVendorPrivateWithReply,
693 sz_xGLXGetFBConfigsSGIXReq +
694 sz_xGLXVendorPrivateWithReplyReq, vpreq);
695 sgi_req = (xGLXGetFBConfigsSGIXReq *) vpreq;
696 sgi_req->reqType = priv->majorOpcode;
697 sgi_req->glxCode = X_GLXVendorPrivateWithReply;
698 sgi_req->vendorCode = X_GLXvop_GetFBConfigsSGIX;
699 sgi_req->screen = screen;
704 if (!_XReply(dpy, (xReply *) & reply, 0, False))
707 psc->configs = createConfigsFromProperties(dpy,
709 reply.numAttribs * 2,
714 return psc->configs != NULL;
718 glx_screen_init(__GLXscreenConfigs *psc,
719 int screen, __GLXdisplayPrivate * priv)
721 /* Initialize per screen dynamic client GLX extensions */
722 psc->ext_list_first_time = GL_TRUE;
724 psc->dpy = priv->dpy;
727 getVisualConfigs(psc, priv, screen);
728 getFBConfigs(psc, priv, screen);
734 ** Allocate the memory for the per screen configs for each screen.
735 ** If that works then fetch the per screen configs data.
738 AllocAndFetchScreenConfigs(Display * dpy, __GLXdisplayPrivate * priv)
740 __GLXscreenConfigs *psc;
744 ** First allocate memory for the array of per screen configs.
746 screens = ScreenCount(dpy);
747 priv->screenConfigs = Xmalloc(screens * sizeof *priv->screenConfigs);
748 if (!priv->screenConfigs)
751 priv->serverGLXversion =
752 __glXQueryServerString(dpy, priv->majorOpcode, 0, GLX_VERSION);
753 if (priv->serverGLXversion == NULL) {
754 FreeScreenConfigs(priv);
758 for (i = 0; i < screens; i++, psc++) {
760 #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
761 if (priv->dri2Display)
762 psc = (*priv->dri2Display->createScreen) (i, priv);
763 if (psc == NULL && priv->driDisplay)
764 psc = (*priv->driDisplay->createScreen) (i, priv);
765 if (psc == NULL && priv->driswDisplay)
766 psc = (*priv->driswDisplay->createScreen) (i, priv);
769 psc = indirect_create_screen(i, priv);
770 priv->screenConfigs[i] = psc;
777 ** Initialize the client side extension code.
779 _X_HIDDEN __GLXdisplayPrivate *
780 __glXInitialize(Display * dpy)
782 __GLXdisplayPrivate *dpyPriv;
783 #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
784 Bool glx_direct, glx_accel;
788 _XLockMutex(_Xglobal_lock);
790 for (dpyPriv = glx_displays; dpyPriv; dpyPriv = dpyPriv->next) {
791 if (dpyPriv->dpy == dpy) {
792 _XUnlockMutex(_Xglobal_lock);
797 dpyPriv = Xcalloc(1, sizeof *dpyPriv);
801 dpyPriv->codes = XInitExtension(dpy, __glXExtensionName);
802 if (!dpyPriv->codes) {
804 _XUnlockMutex(_Xglobal_lock);
809 dpyPriv->majorOpcode = dpyPriv->codes->major_opcode;
810 dpyPriv->serverGLXvendor = 0x0;
811 dpyPriv->serverGLXversion = 0x0;
813 /* See if the versions are compatible */
814 if (!QueryVersion(dpy, dpyPriv->majorOpcode,
815 &dpyPriv->majorVersion, &dpyPriv->minorVersion)) {
817 _XUnlockMutex(_Xglobal_lock);
821 for (i = 0; i < __GLX_NUMBER_EVENTS; i++) {
822 XESetWireToEvent(dpy, dpyPriv->codes->first_event + i, __glXWireToEvent);
823 XESetEventToWire(dpy, dpyPriv->codes->first_event + i, __glXEventToWire);
826 XESetCloseDisplay(dpy, dpyPriv->codes->extension, __glXCloseDisplay);
827 XESetErrorString (dpy, dpyPriv->codes->extension,__glXErrorString);
829 #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
830 glx_direct = (getenv("LIBGL_ALWAYS_INDIRECT") == NULL);
831 glx_accel = (getenv("LIBGL_ALWAYS_SOFTWARE") == NULL);
833 dpyPriv->drawHash = __glxHashCreate();
836 ** Initialize the direct rendering per display data and functions.
837 ** Note: This _must_ be done before calling any other DRI routines
838 ** (e.g., those called in AllocAndFetchScreenConfigs).
840 if (glx_direct && glx_accel) {
841 dpyPriv->dri2Display = dri2CreateDisplay(dpy);
842 dpyPriv->driDisplay = driCreateDisplay(dpy);
845 dpyPriv->driswDisplay = driswCreateDisplay(dpy);
848 #ifdef GLX_USE_APPLEGL
849 if (apple_init_glx(dpy)) {
854 if (!AllocAndFetchScreenConfigs(dpy, dpyPriv)) {
859 if (dpyPriv->majorVersion == 1 && dpyPriv->minorVersion >= 1)
860 __glXClientInfo(dpy, dpyPriv->majorOpcode);
862 dpyPriv->next = glx_displays;
863 glx_displays = dpyPriv;
865 _XUnlockMutex(_Xglobal_lock);
871 ** Setup for sending a GLX command on dpy. Make sure the extension is
872 ** initialized. Try to avoid calling __glXInitialize as its kinda slow.
875 __glXSetupForCommand(Display * dpy)
878 __GLXdisplayPrivate *priv;
880 /* If this thread has a current context, flush its rendering commands */
881 gc = __glXGetCurrentContext();
882 if (gc->currentDpy) {
883 /* Flush rendering buffer of the current context, if any */
884 (void) __glXFlushRenderBuffer(gc, gc->pc);
886 if (gc->currentDpy == dpy) {
887 /* Use opcode from gc because its right */
888 return gc->majorOpcode;
892 ** Have to get info about argument dpy because it might be to
893 ** a different server
898 /* Forced to lookup extension via the slow initialize route */
899 priv = __glXInitialize(dpy);
903 return priv->majorOpcode;
907 * Flush the drawing command transport buffer.
909 * \param ctx Context whose transport buffer is to be flushed.
910 * \param pc Pointer to first unused buffer location.
913 * Modify this function to use \c ctx->pc instead of the explicit
917 __glXFlushRenderBuffer(__GLXcontext * ctx, GLubyte * pc)
919 Display *const dpy = ctx->currentDpy;
921 xcb_connection_t *c = XGetXCBConnection(dpy);
925 const GLint size = pc - ctx->buf;
927 if ((dpy != NULL) && (size > 0)) {
929 xcb_glx_render(c, ctx->currentContextTag, size,
930 (const uint8_t *) ctx->buf);
932 /* Send the entire buffer as an X request */
934 GetReq(GLXRender, req);
935 req->reqType = ctx->majorOpcode;
936 req->glxCode = X_GLXRender;
937 req->contextTag = ctx->currentContextTag;
938 req->length += (size + 3) >> 2;
939 _XSend(dpy, (char *) ctx->buf, size);
945 /* Reset pointer and return it */
952 * Send a portion of a GLXRenderLarge command to the server. The advantage of
953 * this function over \c __glXSendLargeCommand is that callers can use the
954 * data buffer in the GLX context and may be able to avoid allocating an
955 * extra buffer. The disadvantage is the clients will have to do more
956 * GLX protocol work (i.e., calculating \c totalRequests, etc.).
958 * \sa __glXSendLargeCommand
960 * \param gc GLX context
961 * \param requestNumber Which part of the whole command is this? The first
963 * \param totalRequests How many requests will there be?
964 * \param data Command data.
965 * \param dataLen Size, in bytes, of the command data.
968 __glXSendLargeChunk(__GLXcontext * gc, GLint requestNumber,
969 GLint totalRequests, const GLvoid * data, GLint dataLen)
971 Display *dpy = gc->currentDpy;
973 xcb_connection_t *c = XGetXCBConnection(dpy);
974 xcb_glx_render_large(c, gc->currentContextTag, requestNumber,
975 totalRequests, dataLen, data);
977 xGLXRenderLargeReq *req;
979 if (requestNumber == 1) {
983 GetReq(GLXRenderLarge, req);
984 req->reqType = gc->majorOpcode;
985 req->glxCode = X_GLXRenderLarge;
986 req->contextTag = gc->currentContextTag;
987 req->length += (dataLen + 3) >> 2;
988 req->requestNumber = requestNumber;
989 req->requestTotal = totalRequests;
990 req->dataBytes = dataLen;
991 Data(dpy, data, dataLen);
993 if (requestNumber == totalRequests) {
1002 * Send a command that is too large for the GLXRender protocol request.
1004 * Send a large command, one that is too large for some reason to
1005 * send using the GLXRender protocol request. One reason to send
1006 * a large command is to avoid copying the data.
1008 * \param ctx GLX context
1009 * \param header Header data.
1010 * \param headerLen Size, in bytes, of the header data. It is assumed that
1011 * the header data will always be small enough to fit in
1012 * a single X protocol packet.
1013 * \param data Command data.
1014 * \param dataLen Size, in bytes, of the command data.
1017 __glXSendLargeCommand(__GLXcontext * ctx,
1018 const GLvoid * header, GLint headerLen,
1019 const GLvoid * data, GLint dataLen)
1022 GLint totalRequests, requestNumber;
1025 ** Calculate the maximum amount of data can be stuffed into a single
1026 ** packet. sz_xGLXRenderReq is added because bufSize is the maximum
1027 ** packet size minus sz_xGLXRenderReq.
1029 maxSize = (ctx->bufSize + sz_xGLXRenderReq) - sz_xGLXRenderLargeReq;
1030 totalRequests = 1 + (dataLen / maxSize);
1031 if (dataLen % maxSize)
1035 ** Send all of the command, except the large array, as one request.
1037 assert(headerLen <= maxSize);
1038 __glXSendLargeChunk(ctx, 1, totalRequests, header, headerLen);
1041 ** Send enough requests until the whole array is sent.
1043 for (requestNumber = 2; requestNumber <= (totalRequests - 1);
1045 __glXSendLargeChunk(ctx, requestNumber, totalRequests, data, maxSize);
1046 data = (const GLvoid *) (((const GLubyte *) data) + maxSize);
1048 assert(dataLen > 0);
1051 assert(dataLen <= maxSize);
1052 __glXSendLargeChunk(ctx, requestNumber, totalRequests, data, dataLen);
1055 /************************************************************************/
1059 __glXDumpDrawBuffer(__GLXcontext * ctx)
1061 GLubyte *p = ctx->buf;
1062 GLubyte *end = ctx->pc;
1063 GLushort opcode, length;
1067 opcode = *((GLushort *) p);
1068 length = *((GLushort *) (p + 2));
1069 printf("%2x: %5d: ", opcode, length);
1072 while (length > 0) {
1073 printf("%08x ", *((unsigned *) p));