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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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>
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 */
124 XEXT_GENERATE_FIND_DISPLAY(__glXFindDisplay, __glXExtensionInfo,
125 __glXExtensionName, &__glXExtensionHooks,
126 __GLX_NUMBER_EVENTS, NULL)
129 * GLX events are a bit funky. We don't stuff the X event code into
130 * our user exposed (via XNextEvent) structure. Instead we use the GLX
131 * private event code namespace (and hope it doesn't conflict). Clients
132 * have to know that bit 15 in the event type field means they're getting
133 * a GLX event, and then handle the various sub-event types there, rather
134 * than simply checking the event code and handling it directly.
138 __glXWireToEvent(Display *dpy, XEvent *event, xEvent *wire)
140 XExtDisplayInfo *info = __glXFindDisplay(dpy);
142 XextCheckExtension(dpy, info, __glXExtensionName, False);
144 switch ((wire->u.u.type & 0x7f) - info->codes->first_event) {
145 case GLX_PbufferClobber:
147 GLXPbufferClobberEvent *aevent = (GLXPbufferClobberEvent *)event;
148 xGLXPbufferClobberEvent *awire = (xGLXPbufferClobberEvent *)wire;
149 aevent->event_type = awire->type;
150 aevent->serial = awire->sequenceNumber;
151 aevent->event_type = awire->event_type;
152 aevent->draw_type = awire->draw_type;
153 aevent->drawable = awire->drawable;
154 aevent->buffer_mask = awire->buffer_mask;
155 aevent->aux_buffer = awire->aux_buffer;
156 aevent->x = awire->x;
157 aevent->y = awire->y;
158 aevent->width = awire->width;
159 aevent->height = awire->height;
160 aevent->count = awire->count;
163 case GLX_BufferSwapComplete:
165 GLXBufferSwapComplete *aevent = (GLXBufferSwapComplete *)event;
166 xGLXBufferSwapComplete *awire = (xGLXBufferSwapComplete *)wire;
167 aevent->event_type = awire->event_type;
168 aevent->drawable = awire->drawable;
169 aevent->ust = ((CARD64)awire->ust_hi << 32) | awire->ust_lo;
170 aevent->msc = ((CARD64)awire->msc_hi << 32) | awire->msc_lo;
171 aevent->sbc = ((CARD64)awire->sbc_hi << 32) | awire->sbc_lo;
175 /* client doesn't support server event */
182 /* We don't actually support this. It doesn't make sense for clients to
183 * send each other GLX events.
186 __glXEventToWire(Display *dpy, XEvent *event, xEvent *wire)
188 XExtDisplayInfo *info = __glXFindDisplay(dpy);
190 XextCheckExtension(dpy, info, __glXExtensionName, False);
192 switch (event->type) {
197 case GLX_EXCHANGE_COMPLETE:
199 case GLX_BLIT_COMPLETE:
201 case GLX_FLIP_COMPLETE:
204 /* client doesn't support server event */
211 /************************************************************************/
213 ** Free the per screen configs data as well as the array of
214 ** __glXScreenConfigs.
217 FreeScreenConfigs(__GLXdisplayPrivate * priv)
219 __GLXscreenConfigs *psc;
222 /* Free screen configuration information */
223 psc = priv->screenConfigs;
224 screens = ScreenCount(priv->dpy);
225 for (i = 0; i < screens; i++, psc++) {
227 _gl_context_modes_destroy(psc->configs);
228 if (psc->effectiveGLXexts)
229 Xfree(psc->effectiveGLXexts);
230 psc->configs = NULL; /* NOTE: just for paranoia */
233 _gl_context_modes_destroy(psc->visuals);
234 psc->visuals = NULL; /* NOTE: just for paranoia */
236 Xfree((char *) psc->serverGLXexts);
238 #ifdef GLX_DIRECT_RENDERING
239 if (psc->driver_configs) {
241 for (j = 0; psc->driver_configs[j]; j++)
242 free((__DRIconfig *) psc->driver_configs[j]);
243 free(psc->driver_configs);
244 psc->driver_configs = NULL;
246 if (psc->driScreen) {
247 psc->driScreen->destroyScreen(psc);
248 __glxHashDestroy(psc->drawHash);
249 XFree(psc->driScreen);
250 psc->driScreen = NULL;
254 XFree((char *) priv->screenConfigs);
255 priv->screenConfigs = NULL;
259 ** Release the private memory referred to in a display private
260 ** structure. The caller will free the extension structure.
263 __glXFreeDisplayPrivate(XExtData * extension)
265 __GLXdisplayPrivate *priv;
267 priv = (__GLXdisplayPrivate *) extension->private_data;
268 FreeScreenConfigs(priv);
269 if (priv->serverGLXvendor) {
270 Xfree((char *) priv->serverGLXvendor);
271 priv->serverGLXvendor = 0x0; /* to protect against double free's */
273 if (priv->serverGLXversion) {
274 Xfree((char *) priv->serverGLXversion);
275 priv->serverGLXversion = 0x0; /* to protect against double free's */
278 #ifdef GLX_DIRECT_RENDERING
279 /* Free the direct rendering per display data */
280 if (priv->driswDisplay)
281 (*priv->driswDisplay->destroyDisplay) (priv->driswDisplay);
282 priv->driswDisplay = NULL;
284 if (priv->driDisplay)
285 (*priv->driDisplay->destroyDisplay) (priv->driDisplay);
286 priv->driDisplay = NULL;
288 if (priv->dri2Display)
289 (*priv->dri2Display->destroyDisplay) (priv->dri2Display);
290 priv->dri2Display = NULL;
293 Xfree((char *) priv);
297 /************************************************************************/
300 ** Query the version of the GLX extension. This procedure works even if
301 ** the client extension is not completely set up.
304 QueryVersion(Display * dpy, int opcode, int *major, int *minor)
307 xcb_connection_t *c = XGetXCBConnection(dpy);
308 xcb_glx_query_version_reply_t *reply = xcb_glx_query_version_reply(c,
309 xcb_glx_query_version
315 if (reply->major_version != GLX_MAJOR_VERSION) {
319 *major = reply->major_version;
320 *minor = min(reply->minor_version, GLX_MINOR_VERSION);
324 xGLXQueryVersionReq *req;
325 xGLXQueryVersionReply reply;
327 /* Send the glXQueryVersion request */
329 GetReq(GLXQueryVersion, req);
330 req->reqType = opcode;
331 req->glxCode = X_GLXQueryVersion;
332 req->majorVersion = GLX_MAJOR_VERSION;
333 req->minorVersion = GLX_MINOR_VERSION;
334 _XReply(dpy, (xReply *) & reply, 0, False);
338 if (reply.majorVersion != GLX_MAJOR_VERSION) {
340 ** The server does not support the same major release as this
345 *major = reply.majorVersion;
346 *minor = min(reply.minorVersion, GLX_MINOR_VERSION);
353 __glXInitializeVisualConfigFromTags(__GLcontextModes * config, int count,
354 const INT32 * bp, Bool tagged_only,
355 Bool fbconfig_style_tags)
360 /* Copy in the first set of properties */
361 config->visualID = *bp++;
363 config->visualType = _gl_convert_from_x_visual_type(*bp++);
365 config->rgbMode = *bp++;
367 config->redBits = *bp++;
368 config->greenBits = *bp++;
369 config->blueBits = *bp++;
370 config->alphaBits = *bp++;
371 config->accumRedBits = *bp++;
372 config->accumGreenBits = *bp++;
373 config->accumBlueBits = *bp++;
374 config->accumAlphaBits = *bp++;
376 config->doubleBufferMode = *bp++;
377 config->stereoMode = *bp++;
379 config->rgbBits = *bp++;
380 config->depthBits = *bp++;
381 config->stencilBits = *bp++;
382 config->numAuxBuffers = *bp++;
383 config->level = *bp++;
385 count -= __GLX_MIN_CONFIG_PROPS;
389 ** Additional properties may be in a list at the end
390 ** of the reply. They are in pairs of property type
391 ** and property value.
394 #define FETCH_OR_SET(tag) \
395 config-> tag = ( fbconfig_style_tags ) ? *bp++ : 1
397 for (i = 0; i < count; i += 2) {
400 FETCH_OR_SET(rgbMode);
402 case GLX_BUFFER_SIZE:
403 config->rgbBits = *bp++;
406 config->level = *bp++;
408 case GLX_DOUBLEBUFFER:
409 FETCH_OR_SET(doubleBufferMode);
412 FETCH_OR_SET(stereoMode);
414 case GLX_AUX_BUFFERS:
415 config->numAuxBuffers = *bp++;
418 config->redBits = *bp++;
421 config->greenBits = *bp++;
424 config->blueBits = *bp++;
427 config->alphaBits = *bp++;
430 config->depthBits = *bp++;
432 case GLX_STENCIL_SIZE:
433 config->stencilBits = *bp++;
435 case GLX_ACCUM_RED_SIZE:
436 config->accumRedBits = *bp++;
438 case GLX_ACCUM_GREEN_SIZE:
439 config->accumGreenBits = *bp++;
441 case GLX_ACCUM_BLUE_SIZE:
442 config->accumBlueBits = *bp++;
444 case GLX_ACCUM_ALPHA_SIZE:
445 config->accumAlphaBits = *bp++;
447 case GLX_VISUAL_CAVEAT_EXT:
448 config->visualRating = *bp++;
450 case GLX_X_VISUAL_TYPE:
451 config->visualType = *bp++;
453 case GLX_TRANSPARENT_TYPE:
454 config->transparentPixel = *bp++;
456 case GLX_TRANSPARENT_INDEX_VALUE:
457 config->transparentIndex = *bp++;
459 case GLX_TRANSPARENT_RED_VALUE:
460 config->transparentRed = *bp++;
462 case GLX_TRANSPARENT_GREEN_VALUE:
463 config->transparentGreen = *bp++;
465 case GLX_TRANSPARENT_BLUE_VALUE:
466 config->transparentBlue = *bp++;
468 case GLX_TRANSPARENT_ALPHA_VALUE:
469 config->transparentAlpha = *bp++;
472 config->visualID = *bp++;
474 case GLX_DRAWABLE_TYPE:
475 config->drawableType = *bp++;
477 case GLX_RENDER_TYPE:
478 config->renderType = *bp++;
480 case GLX_X_RENDERABLE:
481 config->xRenderable = *bp++;
483 case GLX_FBCONFIG_ID:
484 config->fbconfigID = *bp++;
486 case GLX_MAX_PBUFFER_WIDTH:
487 config->maxPbufferWidth = *bp++;
489 case GLX_MAX_PBUFFER_HEIGHT:
490 config->maxPbufferHeight = *bp++;
492 case GLX_MAX_PBUFFER_PIXELS:
493 config->maxPbufferPixels = *bp++;
495 case GLX_OPTIMAL_PBUFFER_WIDTH_SGIX:
496 config->optimalPbufferWidth = *bp++;
498 case GLX_OPTIMAL_PBUFFER_HEIGHT_SGIX:
499 config->optimalPbufferHeight = *bp++;
501 case GLX_VISUAL_SELECT_GROUP_SGIX:
502 config->visualSelectGroup = *bp++;
504 case GLX_SWAP_METHOD_OML:
505 config->swapMethod = *bp++;
507 case GLX_SAMPLE_BUFFERS_SGIS:
508 config->sampleBuffers = *bp++;
510 case GLX_SAMPLES_SGIS:
511 config->samples = *bp++;
513 case GLX_BIND_TO_TEXTURE_RGB_EXT:
514 config->bindToTextureRgb = *bp++;
516 case GLX_BIND_TO_TEXTURE_RGBA_EXT:
517 config->bindToTextureRgba = *bp++;
519 case GLX_BIND_TO_MIPMAP_TEXTURE_EXT:
520 config->bindToMipmapTexture = *bp++;
522 case GLX_BIND_TO_TEXTURE_TARGETS_EXT:
523 config->bindToTextureTargets = *bp++;
525 case GLX_Y_INVERTED_EXT:
526 config->yInverted = *bp++;
537 (config->rgbMode) ? GLX_RGBA_BIT : GLX_COLOR_INDEX_BIT;
539 config->haveAccumBuffer = ((config->accumRedBits +
540 config->accumGreenBits +
541 config->accumBlueBits +
542 config->accumAlphaBits) > 0);
543 config->haveDepthBuffer = (config->depthBits > 0);
544 config->haveStencilBuffer = (config->stencilBits > 0);
547 static __GLcontextModes *
548 createConfigsFromProperties(Display * dpy, int nvisuals, int nprops,
549 int screen, GLboolean tagged_only)
551 INT32 buf[__GLX_TOTAL_CONFIG], *props;
553 __GLcontextModes *modes, *m;
559 /* FIXME: Is the __GLX_MIN_CONFIG_PROPS test correct for FBconfigs? */
561 /* Check number of properties */
562 if (nprops < __GLX_MIN_CONFIG_PROPS || nprops > __GLX_MAX_CONFIG_PROPS)
565 /* Allocate memory for our config structure */
566 modes = _gl_context_modes_create(nvisuals, sizeof(__GLcontextModes));
570 prop_size = nprops * __GLX_SIZE_INT32;
571 if (prop_size <= sizeof(buf))
574 props = Xmalloc(prop_size);
576 /* Read each config structure and convert it into our format */
578 for (i = 0; i < nvisuals; i++) {
579 _XRead(dpy, (char *) props, prop_size);
580 /* Older X servers don't send this so we default it here. */
581 m->drawableType = GLX_WINDOW_BIT;
582 __glXInitializeVisualConfigFromTags(m, nprops, props,
583 tagged_only, GL_TRUE);
595 getVisualConfigs(Display * dpy, __GLXdisplayPrivate * priv, int screen)
597 xGLXGetVisualConfigsReq *req;
598 __GLXscreenConfigs *psc;
599 xGLXGetVisualConfigsReply reply;
603 psc = priv->screenConfigs + screen;
605 GetReq(GLXGetVisualConfigs, req);
606 req->reqType = priv->majorOpcode;
607 req->glxCode = X_GLXGetVisualConfigs;
608 req->screen = screen;
610 if (!_XReply(dpy, (xReply *) & reply, 0, False))
613 psc->visuals = createConfigsFromProperties(dpy,
620 return psc->visuals != NULL;
624 getFBConfigs(Display * dpy, __GLXdisplayPrivate * priv, int screen)
626 xGLXGetFBConfigsReq *fb_req;
627 xGLXGetFBConfigsSGIXReq *sgi_req;
628 xGLXVendorPrivateWithReplyReq *vpreq;
629 xGLXGetFBConfigsReply reply;
630 __GLXscreenConfigs *psc;
632 psc = priv->screenConfigs + screen;
634 __glXQueryServerString(dpy, priv->majorOpcode, screen, GLX_EXTENSIONS);
639 if (atof(priv->serverGLXversion) >= 1.3) {
640 GetReq(GLXGetFBConfigs, fb_req);
641 fb_req->reqType = priv->majorOpcode;
642 fb_req->glxCode = X_GLXGetFBConfigs;
643 fb_req->screen = screen;
645 else if (strstr(psc->serverGLXexts, "GLX_SGIX_fbconfig") != NULL) {
646 GetReqExtra(GLXVendorPrivateWithReply,
647 sz_xGLXGetFBConfigsSGIXReq +
648 sz_xGLXVendorPrivateWithReplyReq, vpreq);
649 sgi_req = (xGLXGetFBConfigsSGIXReq *) vpreq;
650 sgi_req->reqType = priv->majorOpcode;
651 sgi_req->glxCode = X_GLXVendorPrivateWithReply;
652 sgi_req->vendorCode = X_GLXvop_GetFBConfigsSGIX;
653 sgi_req->screen = screen;
658 if (!_XReply(dpy, (xReply *) & reply, 0, False))
661 psc->configs = createConfigsFromProperties(dpy,
663 reply.numAttribs * 2,
668 return psc->configs != NULL;
672 ** Allocate the memory for the per screen configs for each screen.
673 ** If that works then fetch the per screen configs data.
676 AllocAndFetchScreenConfigs(Display * dpy, __GLXdisplayPrivate * priv)
678 __GLXscreenConfigs *psc;
682 ** First allocate memory for the array of per screen configs.
684 screens = ScreenCount(dpy);
685 psc = (__GLXscreenConfigs *) Xmalloc(screens * sizeof(__GLXscreenConfigs));
689 memset(psc, 0, screens * sizeof(__GLXscreenConfigs));
690 priv->screenConfigs = psc;
692 priv->serverGLXversion =
693 __glXQueryServerString(dpy, priv->majorOpcode, 0, GLX_VERSION);
694 if (priv->serverGLXversion == NULL) {
695 FreeScreenConfigs(priv);
699 for (i = 0; i < screens; i++, psc++) {
700 getVisualConfigs(dpy, priv, i);
701 getFBConfigs(dpy, priv, i);
703 #ifdef GLX_DIRECT_RENDERING
706 psc->drawHash = __glxHashCreate();
707 if (psc->drawHash == NULL)
710 if (priv->dri2Display)
711 psc->driScreen = (*priv->dri2Display->createScreen) (psc, i, priv);
713 if (psc->driScreen == NULL && priv->driDisplay)
714 psc->driScreen = (*priv->driDisplay->createScreen) (psc, i, priv);
716 if (psc->driScreen == NULL && priv->driswDisplay)
717 psc->driScreen = (*priv->driswDisplay->createScreen) (psc, i, priv);
719 if (psc->driScreen == NULL) {
720 __glxHashDestroy(psc->drawHash);
721 psc->drawHash = NULL;
730 ** Initialize the client side extension code.
732 _X_HIDDEN __GLXdisplayPrivate *
733 __glXInitialize(Display * dpy)
735 XExtDisplayInfo *info = __glXFindDisplay(dpy);
736 XExtData **privList, *private, *found;
737 __GLXdisplayPrivate *dpyPriv;
738 XEDataObject dataObj;
740 #ifdef GLX_DIRECT_RENDERING
741 Bool glx_direct, glx_accel;
744 /* The one and only long long lock */
747 if (!XextHasExtension(info)) {
748 /* No GLX extension supported by this server. Oh well. */
750 XMissingExtension(dpy, __glXExtensionName);
754 /* See if a display private already exists. If so, return it */
755 dataObj.display = dpy;
756 privList = XEHeadOfExtensionList(dataObj);
757 found = XFindOnExtensionList(privList, info->codes->extension);
760 return (__GLXdisplayPrivate *) found->private_data;
763 /* See if the versions are compatible */
764 if (!QueryVersion(dpy, info->codes->major_opcode, &major, &minor)) {
765 /* The client and server do not agree on versions. Punt. */
771 ** Allocate memory for all the pieces needed for this buffer.
773 private = (XExtData *) Xmalloc(sizeof(XExtData));
778 dpyPriv = (__GLXdisplayPrivate *) Xcalloc(1, sizeof(__GLXdisplayPrivate));
781 Xfree((char *) private);
786 ** Init the display private and then read in the screen config
787 ** structures from the server.
789 dpyPriv->majorOpcode = info->codes->major_opcode;
790 dpyPriv->majorVersion = major;
791 dpyPriv->minorVersion = minor;
794 dpyPriv->serverGLXvendor = 0x0;
795 dpyPriv->serverGLXversion = 0x0;
797 #ifdef GLX_DIRECT_RENDERING
798 glx_direct = (getenv("LIBGL_ALWAYS_INDIRECT") == NULL);
799 glx_accel = (getenv("LIBGL_ALWAYS_SOFTWARE") == NULL);
802 ** Initialize the direct rendering per display data and functions.
803 ** Note: This _must_ be done before calling any other DRI routines
804 ** (e.g., those called in AllocAndFetchScreenConfigs).
806 if (glx_direct && glx_accel) {
807 dpyPriv->dri2Display = dri2CreateDisplay(dpy);
808 dpyPriv->driDisplay = driCreateDisplay(dpy);
811 dpyPriv->driswDisplay = driswCreateDisplay(dpy);
814 if (!AllocAndFetchScreenConfigs(dpy, dpyPriv)) {
816 Xfree((char *) dpyPriv);
817 Xfree((char *) private);
822 ** Fill in the private structure. This is the actual structure that
823 ** hangs off of the Display structure. Our private structure is
824 ** referred to by this structure. Got that?
826 private->number = info->codes->extension;
828 private->free_private = __glXFreeDisplayPrivate;
829 private->private_data = (char *) dpyPriv;
830 XAddToExtensionList(privList, private);
832 if (dpyPriv->majorVersion == 1 && dpyPriv->minorVersion >= 1) {
833 __glXClientInfo(dpy, dpyPriv->majorOpcode);
841 ** Setup for sending a GLX command on dpy. Make sure the extension is
842 ** initialized. Try to avoid calling __glXInitialize as its kinda slow.
845 __glXSetupForCommand(Display * dpy)
848 __GLXdisplayPrivate *priv;
850 /* If this thread has a current context, flush its rendering commands */
851 gc = __glXGetCurrentContext();
852 if (gc->currentDpy) {
853 /* Flush rendering buffer of the current context, if any */
854 (void) __glXFlushRenderBuffer(gc, gc->pc);
856 if (gc->currentDpy == dpy) {
857 /* Use opcode from gc because its right */
858 return gc->majorOpcode;
862 ** Have to get info about argument dpy because it might be to
863 ** a different server
868 /* Forced to lookup extension via the slow initialize route */
869 priv = __glXInitialize(dpy);
873 return priv->majorOpcode;
877 * Flush the drawing command transport buffer.
879 * \param ctx Context whose transport buffer is to be flushed.
880 * \param pc Pointer to first unused buffer location.
883 * Modify this function to use \c ctx->pc instead of the explicit
887 __glXFlushRenderBuffer(__GLXcontext * ctx, GLubyte * pc)
889 Display *const dpy = ctx->currentDpy;
891 xcb_connection_t *c = XGetXCBConnection(dpy);
895 const GLint size = pc - ctx->buf;
897 if ((dpy != NULL) && (size > 0)) {
899 xcb_glx_render(c, ctx->currentContextTag, size,
900 (const uint8_t *) ctx->buf);
902 /* Send the entire buffer as an X request */
904 GetReq(GLXRender, req);
905 req->reqType = ctx->majorOpcode;
906 req->glxCode = X_GLXRender;
907 req->contextTag = ctx->currentContextTag;
908 req->length += (size + 3) >> 2;
909 _XSend(dpy, (char *) ctx->buf, size);
915 /* Reset pointer and return it */
922 * Send a portion of a GLXRenderLarge command to the server. The advantage of
923 * this function over \c __glXSendLargeCommand is that callers can use the
924 * data buffer in the GLX context and may be able to avoid allocating an
925 * extra buffer. The disadvantage is the clients will have to do more
926 * GLX protocol work (i.e., calculating \c totalRequests, etc.).
928 * \sa __glXSendLargeCommand
930 * \param gc GLX context
931 * \param requestNumber Which part of the whole command is this? The first
933 * \param totalRequests How many requests will there be?
934 * \param data Command data.
935 * \param dataLen Size, in bytes, of the command data.
938 __glXSendLargeChunk(__GLXcontext * gc, GLint requestNumber,
939 GLint totalRequests, const GLvoid * data, GLint dataLen)
941 Display *dpy = gc->currentDpy;
943 xcb_connection_t *c = XGetXCBConnection(dpy);
944 xcb_glx_render_large(c, gc->currentContextTag, requestNumber,
945 totalRequests, dataLen, data);
947 xGLXRenderLargeReq *req;
949 if (requestNumber == 1) {
953 GetReq(GLXRenderLarge, req);
954 req->reqType = gc->majorOpcode;
955 req->glxCode = X_GLXRenderLarge;
956 req->contextTag = gc->currentContextTag;
957 req->length += (dataLen + 3) >> 2;
958 req->requestNumber = requestNumber;
959 req->requestTotal = totalRequests;
960 req->dataBytes = dataLen;
961 Data(dpy, data, dataLen);
963 if (requestNumber == totalRequests) {
972 * Send a command that is too large for the GLXRender protocol request.
974 * Send a large command, one that is too large for some reason to
975 * send using the GLXRender protocol request. One reason to send
976 * a large command is to avoid copying the data.
978 * \param ctx GLX context
979 * \param header Header data.
980 * \param headerLen Size, in bytes, of the header data. It is assumed that
981 * the header data will always be small enough to fit in
982 * a single X protocol packet.
983 * \param data Command data.
984 * \param dataLen Size, in bytes, of the command data.
987 __glXSendLargeCommand(__GLXcontext * ctx,
988 const GLvoid * header, GLint headerLen,
989 const GLvoid * data, GLint dataLen)
992 GLint totalRequests, requestNumber;
995 ** Calculate the maximum amount of data can be stuffed into a single
996 ** packet. sz_xGLXRenderReq is added because bufSize is the maximum
997 ** packet size minus sz_xGLXRenderReq.
999 maxSize = (ctx->bufSize + sz_xGLXRenderReq) - sz_xGLXRenderLargeReq;
1000 totalRequests = 1 + (dataLen / maxSize);
1001 if (dataLen % maxSize)
1005 ** Send all of the command, except the large array, as one request.
1007 assert(headerLen <= maxSize);
1008 __glXSendLargeChunk(ctx, 1, totalRequests, header, headerLen);
1011 ** Send enough requests until the whole array is sent.
1013 for (requestNumber = 2; requestNumber <= (totalRequests - 1);
1015 __glXSendLargeChunk(ctx, requestNumber, totalRequests, data, maxSize);
1016 data = (const GLvoid *) (((const GLubyte *) data) + maxSize);
1018 assert(dataLen > 0);
1021 assert(dataLen <= maxSize);
1022 __glXSendLargeChunk(ctx, requestNumber, totalRequests, data, dataLen);
1025 /************************************************************************/
1029 __glXDumpDrawBuffer(__GLXcontext * ctx)
1031 GLubyte *p = ctx->buf;
1032 GLubyte *end = ctx->pc;
1033 GLushort opcode, length;
1037 opcode = *((GLushort *) p);
1038 length = *((GLushort *) (p + 2));
1039 printf("%2x: %5d: ", opcode, length);
1042 while (length > 0) {
1043 printf("%08x ", *((unsigned *) p));