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 #include "glxextensions.h"
46 #include "glcontextmodes.h"
49 #include <X11/Xlib-xcb.h>
56 void __glXDumpDrawBuffer(__GLXcontext * ctx);
60 ** You can set this cell to 1 to force the gl drawing stuff to be
61 ** one command per packet
63 _X_HIDDEN int __glXDebug = 0;
65 /* Extension required boiler plate */
67 static char *__glXExtensionName = GLX_EXTENSION_NAME;
68 XExtensionInfo *__glXExtensionInfo = NULL;
70 static /* const */ char *error_list[] = {
76 "GLXBadCurrentWindow",
77 "GLXBadRenderRequest",
79 "GLXUnsupportedPrivateRequest",
82 "GLXBadCurrentDrawable",
87 __glXCloseDisplay(Display * dpy, XExtCodes * codes)
91 gc = __glXGetCurrentContext();
92 if (dpy == gc->currentDpy) {
93 __glXSetCurrentContextNull();
97 return XextRemoveDisplay(__glXExtensionInfo, dpy);
102 XEXT_GENERATE_ERROR_STRING(__glXErrorString, __glXExtensionName,
103 __GLX_NUMBER_ERRORS, error_list)
105 __glXWireToEvent(Display *dpy, XEvent *event, xEvent *wire);
107 __glXEventToWire(Display *dpy, XEvent *event, xEvent *wire);
109 static /* const */ XExtensionHooks __glXExtensionHooks = {
110 NULL, /* create_gc */
114 NULL, /* create_font */
115 NULL, /* free_font */
116 __glXCloseDisplay, /* close_display */
117 __glXWireToEvent, /* wire_to_event */
118 __glXEventToWire, /* event_to_wire */
120 __glXErrorString, /* error_string */
123 XEXT_GENERATE_FIND_DISPLAY(__glXFindDisplay, __glXExtensionInfo,
124 __glXExtensionName, &__glXExtensionHooks,
125 __GLX_NUMBER_EVENTS, NULL)
128 * GLX events are a bit funky. We don't stuff the X event code into
129 * our user exposed (via XNextEvent) structure. Instead we use the GLX
130 * private event code namespace (and hope it doesn't conflict). Clients
131 * have to know that bit 15 in the event type field means they're getting
132 * a GLX event, and then handle the various sub-event types there, rather
133 * than simply checking the event code and handling it directly.
137 __glXWireToEvent(Display *dpy, XEvent *event, xEvent *wire)
139 XExtDisplayInfo *info = __glXFindDisplay(dpy);
141 XextCheckExtension(dpy, info, __glXExtensionName, False);
143 switch ((wire->u.u.type & 0x7f) - info->codes->first_event) {
144 case GLX_PbufferClobber:
146 GLXPbufferClobberEvent *aevent = (GLXPbufferClobberEvent *)event;
147 xGLXPbufferClobberEvent *awire = (xGLXPbufferClobberEvent *)wire;
148 aevent->event_type = awire->type;
149 aevent->serial = awire->sequenceNumber;
150 aevent->event_type = awire->event_type;
151 aevent->draw_type = awire->draw_type;
152 aevent->drawable = awire->drawable;
153 aevent->buffer_mask = awire->buffer_mask;
154 aevent->aux_buffer = awire->aux_buffer;
155 aevent->x = awire->x;
156 aevent->y = awire->y;
157 aevent->width = awire->width;
158 aevent->height = awire->height;
159 aevent->count = awire->count;
162 /* No easy symbol to test for this, as GLX_BufferSwapComplete is
163 * defined in the local glx.h header, but the
164 * xGLXBufferSwapComplete typedef is only available in new versions
165 * of the external glxproto.h header, which doesn't have any
166 * testable versioning define.
168 * I'll use the related DRI2 define, in the hope that we won't
169 * receive these events unless we know how to ask for them:
171 #ifdef X_DRI2SwapBuffers
172 case GLX_BufferSwapComplete:
174 GLXBufferSwapComplete *aevent = (GLXBufferSwapComplete *)event;
175 xGLXBufferSwapComplete *awire = (xGLXBufferSwapComplete *)wire;
176 aevent->event_type = awire->event_type;
177 aevent->drawable = awire->drawable;
178 aevent->ust = ((CARD64)awire->ust_hi << 32) | awire->ust_lo;
179 aevent->msc = ((CARD64)awire->msc_hi << 32) | awire->msc_lo;
180 aevent->sbc = ((CARD64)awire->sbc_hi << 32) | awire->sbc_lo;
185 /* client doesn't support server event */
192 /* We don't actually support this. It doesn't make sense for clients to
193 * send each other GLX events.
196 __glXEventToWire(Display *dpy, XEvent *event, xEvent *wire)
198 XExtDisplayInfo *info = __glXFindDisplay(dpy);
200 XextCheckExtension(dpy, info, __glXExtensionName, False);
202 switch (event->type) {
207 case GLX_EXCHANGE_COMPLETE_INTEL:
209 case GLX_COPY_COMPLETE_INTEL:
211 case GLX_FLIP_COMPLETE_INTEL:
214 /* client doesn't support server event */
221 /************************************************************************/
223 ** Free the per screen configs data as well as the array of
224 ** __glXScreenConfigs.
227 FreeScreenConfigs(__GLXdisplayPrivate * priv)
229 __GLXscreenConfigs *psc;
232 /* Free screen configuration information */
233 psc = priv->screenConfigs;
234 screens = ScreenCount(priv->dpy);
235 for (i = 0; i < screens; i++, psc++) {
237 _gl_context_modes_destroy(psc->configs);
238 if (psc->effectiveGLXexts)
239 Xfree(psc->effectiveGLXexts);
240 psc->configs = NULL; /* NOTE: just for paranoia */
243 _gl_context_modes_destroy(psc->visuals);
244 psc->visuals = NULL; /* NOTE: just for paranoia */
246 Xfree((char *) psc->serverGLXexts);
248 #ifdef GLX_DIRECT_RENDERING
249 if (psc->driver_configs) {
251 for (j = 0; psc->driver_configs[j]; j++)
252 free((__DRIconfig *) psc->driver_configs[j]);
253 free(psc->driver_configs);
254 psc->driver_configs = NULL;
256 if (psc->driScreen) {
257 psc->driScreen->destroyScreen(psc);
258 __glxHashDestroy(psc->drawHash);
259 XFree(psc->driScreen);
260 psc->driScreen = NULL;
264 XFree((char *) priv->screenConfigs);
265 priv->screenConfigs = NULL;
269 ** Release the private memory referred to in a display private
270 ** structure. The caller will free the extension structure.
273 __glXFreeDisplayPrivate(XExtData * extension)
275 __GLXdisplayPrivate *priv;
277 priv = (__GLXdisplayPrivate *) extension->private_data;
278 FreeScreenConfigs(priv);
279 if (priv->serverGLXvendor) {
280 Xfree((char *) priv->serverGLXvendor);
281 priv->serverGLXvendor = 0x0; /* to protect against double free's */
283 if (priv->serverGLXversion) {
284 Xfree((char *) priv->serverGLXversion);
285 priv->serverGLXversion = 0x0; /* to protect against double free's */
288 #ifdef GLX_DIRECT_RENDERING
289 /* Free the direct rendering per display data */
290 if (priv->driswDisplay)
291 (*priv->driswDisplay->destroyDisplay) (priv->driswDisplay);
292 priv->driswDisplay = NULL;
294 if (priv->driDisplay)
295 (*priv->driDisplay->destroyDisplay) (priv->driDisplay);
296 priv->driDisplay = NULL;
298 if (priv->dri2Display)
299 (*priv->dri2Display->destroyDisplay) (priv->dri2Display);
300 priv->dri2Display = NULL;
303 Xfree((char *) priv);
307 /************************************************************************/
310 ** Query the version of the GLX extension. This procedure works even if
311 ** the client extension is not completely set up.
314 QueryVersion(Display * dpy, int opcode, int *major, int *minor)
317 xcb_connection_t *c = XGetXCBConnection(dpy);
318 xcb_glx_query_version_reply_t *reply = xcb_glx_query_version_reply(c,
319 xcb_glx_query_version
325 if (reply->major_version != GLX_MAJOR_VERSION) {
329 *major = reply->major_version;
330 *minor = min(reply->minor_version, GLX_MINOR_VERSION);
334 xGLXQueryVersionReq *req;
335 xGLXQueryVersionReply reply;
337 /* Send the glXQueryVersion request */
339 GetReq(GLXQueryVersion, req);
340 req->reqType = opcode;
341 req->glxCode = X_GLXQueryVersion;
342 req->majorVersion = GLX_MAJOR_VERSION;
343 req->minorVersion = GLX_MINOR_VERSION;
344 _XReply(dpy, (xReply *) & reply, 0, False);
348 if (reply.majorVersion != GLX_MAJOR_VERSION) {
350 ** The server does not support the same major release as this
355 *major = reply.majorVersion;
356 *minor = min(reply.minorVersion, GLX_MINOR_VERSION);
363 __glXInitializeVisualConfigFromTags(__GLcontextModes * config, int count,
364 const INT32 * bp, Bool tagged_only,
365 Bool fbconfig_style_tags)
370 /* Copy in the first set of properties */
371 config->visualID = *bp++;
373 config->visualType = _gl_convert_from_x_visual_type(*bp++);
375 config->rgbMode = *bp++;
377 config->redBits = *bp++;
378 config->greenBits = *bp++;
379 config->blueBits = *bp++;
380 config->alphaBits = *bp++;
381 config->accumRedBits = *bp++;
382 config->accumGreenBits = *bp++;
383 config->accumBlueBits = *bp++;
384 config->accumAlphaBits = *bp++;
386 config->doubleBufferMode = *bp++;
387 config->stereoMode = *bp++;
389 config->rgbBits = *bp++;
390 config->depthBits = *bp++;
391 config->stencilBits = *bp++;
392 config->numAuxBuffers = *bp++;
393 config->level = *bp++;
395 count -= __GLX_MIN_CONFIG_PROPS;
399 ** Additional properties may be in a list at the end
400 ** of the reply. They are in pairs of property type
401 ** and property value.
404 #define FETCH_OR_SET(tag) \
405 config-> tag = ( fbconfig_style_tags ) ? *bp++ : 1
407 for (i = 0; i < count; i += 2) {
410 FETCH_OR_SET(rgbMode);
412 case GLX_BUFFER_SIZE:
413 config->rgbBits = *bp++;
416 config->level = *bp++;
418 case GLX_DOUBLEBUFFER:
419 FETCH_OR_SET(doubleBufferMode);
422 FETCH_OR_SET(stereoMode);
424 case GLX_AUX_BUFFERS:
425 config->numAuxBuffers = *bp++;
428 config->redBits = *bp++;
431 config->greenBits = *bp++;
434 config->blueBits = *bp++;
437 config->alphaBits = *bp++;
440 config->depthBits = *bp++;
442 case GLX_STENCIL_SIZE:
443 config->stencilBits = *bp++;
445 case GLX_ACCUM_RED_SIZE:
446 config->accumRedBits = *bp++;
448 case GLX_ACCUM_GREEN_SIZE:
449 config->accumGreenBits = *bp++;
451 case GLX_ACCUM_BLUE_SIZE:
452 config->accumBlueBits = *bp++;
454 case GLX_ACCUM_ALPHA_SIZE:
455 config->accumAlphaBits = *bp++;
457 case GLX_VISUAL_CAVEAT_EXT:
458 config->visualRating = *bp++;
460 case GLX_X_VISUAL_TYPE:
461 config->visualType = *bp++;
463 case GLX_TRANSPARENT_TYPE:
464 config->transparentPixel = *bp++;
466 case GLX_TRANSPARENT_INDEX_VALUE:
467 config->transparentIndex = *bp++;
469 case GLX_TRANSPARENT_RED_VALUE:
470 config->transparentRed = *bp++;
472 case GLX_TRANSPARENT_GREEN_VALUE:
473 config->transparentGreen = *bp++;
475 case GLX_TRANSPARENT_BLUE_VALUE:
476 config->transparentBlue = *bp++;
478 case GLX_TRANSPARENT_ALPHA_VALUE:
479 config->transparentAlpha = *bp++;
482 config->visualID = *bp++;
484 case GLX_DRAWABLE_TYPE:
485 config->drawableType = *bp++;
487 case GLX_RENDER_TYPE:
488 config->renderType = *bp++;
490 case GLX_X_RENDERABLE:
491 config->xRenderable = *bp++;
493 case GLX_FBCONFIG_ID:
494 config->fbconfigID = *bp++;
496 case GLX_MAX_PBUFFER_WIDTH:
497 config->maxPbufferWidth = *bp++;
499 case GLX_MAX_PBUFFER_HEIGHT:
500 config->maxPbufferHeight = *bp++;
502 case GLX_MAX_PBUFFER_PIXELS:
503 config->maxPbufferPixels = *bp++;
505 case GLX_OPTIMAL_PBUFFER_WIDTH_SGIX:
506 config->optimalPbufferWidth = *bp++;
508 case GLX_OPTIMAL_PBUFFER_HEIGHT_SGIX:
509 config->optimalPbufferHeight = *bp++;
511 case GLX_VISUAL_SELECT_GROUP_SGIX:
512 config->visualSelectGroup = *bp++;
514 case GLX_SWAP_METHOD_OML:
515 config->swapMethod = *bp++;
517 case GLX_SAMPLE_BUFFERS_SGIS:
518 config->sampleBuffers = *bp++;
520 case GLX_SAMPLES_SGIS:
521 config->samples = *bp++;
523 case GLX_BIND_TO_TEXTURE_RGB_EXT:
524 config->bindToTextureRgb = *bp++;
526 case GLX_BIND_TO_TEXTURE_RGBA_EXT:
527 config->bindToTextureRgba = *bp++;
529 case GLX_BIND_TO_MIPMAP_TEXTURE_EXT:
530 config->bindToMipmapTexture = *bp++;
532 case GLX_BIND_TO_TEXTURE_TARGETS_EXT:
533 config->bindToTextureTargets = *bp++;
535 case GLX_Y_INVERTED_EXT:
536 config->yInverted = *bp++;
542 /* Ignore the unrecognized tag's value */
549 (config->rgbMode) ? GLX_RGBA_BIT : GLX_COLOR_INDEX_BIT;
551 config->haveAccumBuffer = ((config->accumRedBits +
552 config->accumGreenBits +
553 config->accumBlueBits +
554 config->accumAlphaBits) > 0);
555 config->haveDepthBuffer = (config->depthBits > 0);
556 config->haveStencilBuffer = (config->stencilBits > 0);
559 static __GLcontextModes *
560 createConfigsFromProperties(Display * dpy, int nvisuals, int nprops,
561 int screen, GLboolean tagged_only)
563 INT32 buf[__GLX_TOTAL_CONFIG], *props;
565 __GLcontextModes *modes, *m;
571 /* FIXME: Is the __GLX_MIN_CONFIG_PROPS test correct for FBconfigs? */
573 /* Check number of properties */
574 if (nprops < __GLX_MIN_CONFIG_PROPS || nprops > __GLX_MAX_CONFIG_PROPS)
577 /* Allocate memory for our config structure */
578 modes = _gl_context_modes_create(nvisuals, sizeof(__GLcontextModes));
582 prop_size = nprops * __GLX_SIZE_INT32;
583 if (prop_size <= sizeof(buf))
586 props = Xmalloc(prop_size);
588 /* Read each config structure and convert it into our format */
590 for (i = 0; i < nvisuals; i++) {
591 _XRead(dpy, (char *) props, prop_size);
592 /* Older X servers don't send this so we default it here. */
593 m->drawableType = GLX_WINDOW_BIT;
594 __glXInitializeVisualConfigFromTags(m, nprops, props,
595 tagged_only, GL_TRUE);
607 getVisualConfigs(Display * dpy, __GLXdisplayPrivate * priv, int screen)
609 xGLXGetVisualConfigsReq *req;
610 __GLXscreenConfigs *psc;
611 xGLXGetVisualConfigsReply reply;
615 psc = priv->screenConfigs + screen;
617 GetReq(GLXGetVisualConfigs, req);
618 req->reqType = priv->majorOpcode;
619 req->glxCode = X_GLXGetVisualConfigs;
620 req->screen = screen;
622 if (!_XReply(dpy, (xReply *) & reply, 0, False))
625 psc->visuals = createConfigsFromProperties(dpy,
632 return psc->visuals != NULL;
636 getFBConfigs(Display * dpy, __GLXdisplayPrivate * priv, int screen)
638 xGLXGetFBConfigsReq *fb_req;
639 xGLXGetFBConfigsSGIXReq *sgi_req;
640 xGLXVendorPrivateWithReplyReq *vpreq;
641 xGLXGetFBConfigsReply reply;
642 __GLXscreenConfigs *psc;
644 psc = priv->screenConfigs + screen;
646 __glXQueryServerString(dpy, priv->majorOpcode, screen, GLX_EXTENSIONS);
651 if (atof(priv->serverGLXversion) >= 1.3) {
652 GetReq(GLXGetFBConfigs, fb_req);
653 fb_req->reqType = priv->majorOpcode;
654 fb_req->glxCode = X_GLXGetFBConfigs;
655 fb_req->screen = screen;
657 else if (strstr(psc->serverGLXexts, "GLX_SGIX_fbconfig") != NULL) {
658 GetReqExtra(GLXVendorPrivateWithReply,
659 sz_xGLXGetFBConfigsSGIXReq +
660 sz_xGLXVendorPrivateWithReplyReq, vpreq);
661 sgi_req = (xGLXGetFBConfigsSGIXReq *) vpreq;
662 sgi_req->reqType = priv->majorOpcode;
663 sgi_req->glxCode = X_GLXVendorPrivateWithReply;
664 sgi_req->vendorCode = X_GLXvop_GetFBConfigsSGIX;
665 sgi_req->screen = screen;
670 if (!_XReply(dpy, (xReply *) & reply, 0, False))
673 psc->configs = createConfigsFromProperties(dpy,
675 reply.numAttribs * 2,
680 return psc->configs != NULL;
684 ** Allocate the memory for the per screen configs for each screen.
685 ** If that works then fetch the per screen configs data.
688 AllocAndFetchScreenConfigs(Display * dpy, __GLXdisplayPrivate * priv)
690 __GLXscreenConfigs *psc;
694 ** First allocate memory for the array of per screen configs.
696 screens = ScreenCount(dpy);
697 psc = (__GLXscreenConfigs *) Xmalloc(screens * sizeof(__GLXscreenConfigs));
701 memset(psc, 0, screens * sizeof(__GLXscreenConfigs));
702 priv->screenConfigs = psc;
704 priv->serverGLXversion =
705 __glXQueryServerString(dpy, priv->majorOpcode, 0, GLX_VERSION);
706 if (priv->serverGLXversion == NULL) {
707 FreeScreenConfigs(priv);
711 for (i = 0; i < screens; i++, psc++) {
712 getVisualConfigs(dpy, priv, i);
713 getFBConfigs(dpy, priv, i);
715 #ifdef GLX_DIRECT_RENDERING
718 psc->drawHash = __glxHashCreate();
719 if (psc->drawHash == NULL)
722 /* Initialize per screen dynamic client GLX extensions */
723 psc->ext_list_first_time = GL_TRUE;
725 if (priv->dri2Display)
726 psc->driScreen = (*priv->dri2Display->createScreen) (psc, i, priv);
728 if (psc->driScreen == NULL && priv->driDisplay)
729 psc->driScreen = (*priv->driDisplay->createScreen) (psc, i, priv);
731 if (psc->driScreen == NULL && priv->driswDisplay)
732 psc->driScreen = (*priv->driswDisplay->createScreen) (psc, i, priv);
734 if (psc->driScreen == NULL) {
735 __glxHashDestroy(psc->drawHash);
736 psc->drawHash = NULL;
745 ** Initialize the client side extension code.
747 _X_HIDDEN __GLXdisplayPrivate *
748 __glXInitialize(Display * dpy)
750 XExtDisplayInfo *info = __glXFindDisplay(dpy);
751 XExtData **privList, *private, *found;
752 __GLXdisplayPrivate *dpyPriv;
753 XEDataObject dataObj;
755 #ifdef GLX_DIRECT_RENDERING
756 Bool glx_direct, glx_accel;
759 /* The one and only long long lock */
762 if (!XextHasExtension(info)) {
763 /* No GLX extension supported by this server. Oh well. */
765 XMissingExtension(dpy, __glXExtensionName);
769 /* See if a display private already exists. If so, return it */
770 dataObj.display = dpy;
771 privList = XEHeadOfExtensionList(dataObj);
772 found = XFindOnExtensionList(privList, info->codes->extension);
775 return (__GLXdisplayPrivate *) found->private_data;
778 /* See if the versions are compatible */
779 if (!QueryVersion(dpy, info->codes->major_opcode, &major, &minor)) {
780 /* The client and server do not agree on versions. Punt. */
786 ** Allocate memory for all the pieces needed for this buffer.
788 private = (XExtData *) Xmalloc(sizeof(XExtData));
793 dpyPriv = (__GLXdisplayPrivate *) Xcalloc(1, sizeof(__GLXdisplayPrivate));
796 Xfree((char *) private);
801 ** Init the display private and then read in the screen config
802 ** structures from the server.
804 dpyPriv->majorOpcode = info->codes->major_opcode;
805 dpyPriv->majorVersion = major;
806 dpyPriv->minorVersion = minor;
809 dpyPriv->serverGLXvendor = 0x0;
810 dpyPriv->serverGLXversion = 0x0;
812 #ifdef GLX_DIRECT_RENDERING
813 glx_direct = (getenv("LIBGL_ALWAYS_INDIRECT") == NULL);
814 glx_accel = (getenv("LIBGL_ALWAYS_SOFTWARE") == NULL);
817 ** Initialize the direct rendering per display data and functions.
818 ** Note: This _must_ be done before calling any other DRI routines
819 ** (e.g., those called in AllocAndFetchScreenConfigs).
821 if (glx_direct && glx_accel) {
822 dpyPriv->dri2Display = dri2CreateDisplay(dpy);
823 dpyPriv->driDisplay = driCreateDisplay(dpy);
826 dpyPriv->driswDisplay = driswCreateDisplay(dpy);
829 if (!AllocAndFetchScreenConfigs(dpy, dpyPriv)) {
831 Xfree((char *) dpyPriv);
832 Xfree((char *) private);
837 ** Fill in the private structure. This is the actual structure that
838 ** hangs off of the Display structure. Our private structure is
839 ** referred to by this structure. Got that?
841 private->number = info->codes->extension;
843 private->free_private = __glXFreeDisplayPrivate;
844 private->private_data = (char *) dpyPriv;
845 XAddToExtensionList(privList, private);
847 if (dpyPriv->majorVersion == 1 && dpyPriv->minorVersion >= 1) {
848 __glXClientInfo(dpy, dpyPriv->majorOpcode);
856 ** Setup for sending a GLX command on dpy. Make sure the extension is
857 ** initialized. Try to avoid calling __glXInitialize as its kinda slow.
860 __glXSetupForCommand(Display * dpy)
863 __GLXdisplayPrivate *priv;
865 /* If this thread has a current context, flush its rendering commands */
866 gc = __glXGetCurrentContext();
867 if (gc->currentDpy) {
868 /* Flush rendering buffer of the current context, if any */
869 (void) __glXFlushRenderBuffer(gc, gc->pc);
871 if (gc->currentDpy == dpy) {
872 /* Use opcode from gc because its right */
873 return gc->majorOpcode;
877 ** Have to get info about argument dpy because it might be to
878 ** a different server
883 /* Forced to lookup extension via the slow initialize route */
884 priv = __glXInitialize(dpy);
888 return priv->majorOpcode;
892 * Flush the drawing command transport buffer.
894 * \param ctx Context whose transport buffer is to be flushed.
895 * \param pc Pointer to first unused buffer location.
898 * Modify this function to use \c ctx->pc instead of the explicit
902 __glXFlushRenderBuffer(__GLXcontext * ctx, GLubyte * pc)
904 Display *const dpy = ctx->currentDpy;
906 xcb_connection_t *c = XGetXCBConnection(dpy);
910 const GLint size = pc - ctx->buf;
912 if ((dpy != NULL) && (size > 0)) {
914 xcb_glx_render(c, ctx->currentContextTag, size,
915 (const uint8_t *) ctx->buf);
917 /* Send the entire buffer as an X request */
919 GetReq(GLXRender, req);
920 req->reqType = ctx->majorOpcode;
921 req->glxCode = X_GLXRender;
922 req->contextTag = ctx->currentContextTag;
923 req->length += (size + 3) >> 2;
924 _XSend(dpy, (char *) ctx->buf, size);
930 /* Reset pointer and return it */
937 * Send a portion of a GLXRenderLarge command to the server. The advantage of
938 * this function over \c __glXSendLargeCommand is that callers can use the
939 * data buffer in the GLX context and may be able to avoid allocating an
940 * extra buffer. The disadvantage is the clients will have to do more
941 * GLX protocol work (i.e., calculating \c totalRequests, etc.).
943 * \sa __glXSendLargeCommand
945 * \param gc GLX context
946 * \param requestNumber Which part of the whole command is this? The first
948 * \param totalRequests How many requests will there be?
949 * \param data Command data.
950 * \param dataLen Size, in bytes, of the command data.
953 __glXSendLargeChunk(__GLXcontext * gc, GLint requestNumber,
954 GLint totalRequests, const GLvoid * data, GLint dataLen)
956 Display *dpy = gc->currentDpy;
958 xcb_connection_t *c = XGetXCBConnection(dpy);
959 xcb_glx_render_large(c, gc->currentContextTag, requestNumber,
960 totalRequests, dataLen, data);
962 xGLXRenderLargeReq *req;
964 if (requestNumber == 1) {
968 GetReq(GLXRenderLarge, req);
969 req->reqType = gc->majorOpcode;
970 req->glxCode = X_GLXRenderLarge;
971 req->contextTag = gc->currentContextTag;
972 req->length += (dataLen + 3) >> 2;
973 req->requestNumber = requestNumber;
974 req->requestTotal = totalRequests;
975 req->dataBytes = dataLen;
976 Data(dpy, data, dataLen);
978 if (requestNumber == totalRequests) {
987 * Send a command that is too large for the GLXRender protocol request.
989 * Send a large command, one that is too large for some reason to
990 * send using the GLXRender protocol request. One reason to send
991 * a large command is to avoid copying the data.
993 * \param ctx GLX context
994 * \param header Header data.
995 * \param headerLen Size, in bytes, of the header data. It is assumed that
996 * the header data will always be small enough to fit in
997 * a single X protocol packet.
998 * \param data Command data.
999 * \param dataLen Size, in bytes, of the command data.
1002 __glXSendLargeCommand(__GLXcontext * ctx,
1003 const GLvoid * header, GLint headerLen,
1004 const GLvoid * data, GLint dataLen)
1007 GLint totalRequests, requestNumber;
1010 ** Calculate the maximum amount of data can be stuffed into a single
1011 ** packet. sz_xGLXRenderReq is added because bufSize is the maximum
1012 ** packet size minus sz_xGLXRenderReq.
1014 maxSize = (ctx->bufSize + sz_xGLXRenderReq) - sz_xGLXRenderLargeReq;
1015 totalRequests = 1 + (dataLen / maxSize);
1016 if (dataLen % maxSize)
1020 ** Send all of the command, except the large array, as one request.
1022 assert(headerLen <= maxSize);
1023 __glXSendLargeChunk(ctx, 1, totalRequests, header, headerLen);
1026 ** Send enough requests until the whole array is sent.
1028 for (requestNumber = 2; requestNumber <= (totalRequests - 1);
1030 __glXSendLargeChunk(ctx, requestNumber, totalRequests, data, maxSize);
1031 data = (const GLvoid *) (((const GLubyte *) data) + maxSize);
1033 assert(dataLen > 0);
1036 assert(dataLen <= maxSize);
1037 __glXSendLargeChunk(ctx, requestNumber, totalRequests, data, dataLen);
1040 /************************************************************************/
1044 __glXDumpDrawBuffer(__GLXcontext * ctx)
1046 GLubyte *p = ctx->buf;
1047 GLubyte *end = ctx->pc;
1048 GLushort opcode, length;
1052 opcode = *((GLushort *) p);
1053 length = *((GLushort *) (p + 2));
1054 printf("%2x: %5d: ", opcode, length);
1057 while (length > 0) {
1058 printf("%08x ", *((unsigned *) p));