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 #ifdef GLX_USE_APPLEGL
45 #include "apple_glx.h"
46 #include "apple_visual.h"
48 #include "glxextensions.h"
50 #include <X11/Xlib-xcb.h>
56 void __glXDumpDrawBuffer(struct glx_context * 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 const char __glXExtensionName[] = GLX_EXTENSION_NAME;
68 static struct glx_display *glx_displays;
70 static /* const */ char *error_list[] = {
76 "GLXBadCurrentWindow",
77 "GLXBadRenderRequest",
79 "GLXUnsupportedPrivateRequest",
82 "GLXBadCurrentDrawable",
87 #ifdef GLX_USE_APPLEGL
88 static char *__glXErrorString(Display *dpy, int code, XExtCodes *codes,
93 XEXT_GENERATE_ERROR_STRING(__glXErrorString, __glXExtensionName,
94 __GLX_NUMBER_ERRORS, error_list)
97 * GLX events are a bit funky. We don't stuff the X event code into
98 * our user exposed (via XNextEvent) structure. Instead we use the GLX
99 * private event code namespace (and hope it doesn't conflict). Clients
100 * have to know that bit 15 in the event type field means they're getting
101 * a GLX event, and then handle the various sub-event types there, rather
102 * than simply checking the event code and handling it directly.
106 __glXWireToEvent(Display *dpy, XEvent *event, xEvent *wire)
108 struct glx_display *glx_dpy = __glXInitialize(dpy);
113 switch ((wire->u.u.type & 0x7f) - glx_dpy->codes->first_event) {
114 case GLX_PbufferClobber:
116 GLXPbufferClobberEvent *aevent = (GLXPbufferClobberEvent *)event;
117 xGLXPbufferClobberEvent *awire = (xGLXPbufferClobberEvent *)wire;
118 aevent->event_type = awire->type;
119 aevent->serial = awire->sequenceNumber;
120 aevent->event_type = awire->event_type;
121 aevent->draw_type = awire->draw_type;
122 aevent->drawable = awire->drawable;
123 aevent->buffer_mask = awire->buffer_mask;
124 aevent->aux_buffer = awire->aux_buffer;
125 aevent->x = awire->x;
126 aevent->y = awire->y;
127 aevent->width = awire->width;
128 aevent->height = awire->height;
129 aevent->count = awire->count;
132 case GLX_BufferSwapComplete:
134 GLXBufferSwapComplete *aevent = (GLXBufferSwapComplete *)event;
135 xGLXBufferSwapComplete2 *awire = (xGLXBufferSwapComplete2 *)wire;
136 struct glx_drawable *glxDraw = GetGLXDrawable(dpy, awire->drawable);
137 aevent->event_type = awire->event_type;
138 aevent->drawable = awire->drawable;
139 aevent->ust = ((CARD64)awire->ust_hi << 32) | awire->ust_lo;
140 aevent->msc = ((CARD64)awire->msc_hi << 32) | awire->msc_lo;
145 if (awire->sbc < glxDraw->lastEventSbc)
146 glxDraw->eventSbcWrap += 0x100000000;
147 glxDraw->lastEventSbc = awire->sbc;
148 aevent->sbc = awire->sbc + glxDraw->eventSbcWrap;
152 /* client doesn't support server event */
159 /* We don't actually support this. It doesn't make sense for clients to
160 * send each other GLX events.
163 __glXEventToWire(Display *dpy, XEvent *event, xEvent *wire)
165 struct glx_display *glx_dpy = __glXInitialize(dpy);
170 switch (event->type) {
175 case GLX_EXCHANGE_COMPLETE_INTEL:
177 case GLX_COPY_COMPLETE_INTEL:
179 case GLX_FLIP_COMPLETE_INTEL:
182 /* client doesn't support server event */
189 /************************************************************************/
191 ** Free the per screen configs data as well as the array of
192 ** __glXScreenConfigs.
195 FreeScreenConfigs(struct glx_display * priv)
197 struct glx_screen *psc;
200 /* Free screen configuration information */
201 screens = ScreenCount(priv->dpy);
202 for (i = 0; i < screens; i++) {
203 psc = priv->screens[i];
204 glx_screen_cleanup(psc);
206 #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
207 if (psc->driScreen) {
208 psc->driScreen->destroyScreen(psc);
216 free((char *) priv->screens);
217 priv->screens = NULL;
221 glx_display_free(struct glx_display *priv)
223 struct glx_context *gc;
225 gc = __glXGetCurrentContext();
226 if (priv->dpy == gc->currentDpy) {
227 gc->vtable->destroy(gc);
228 __glXSetCurrentContextNull();
231 FreeScreenConfigs(priv);
232 free((char *) priv->serverGLXvendor);
233 free((char *) priv->serverGLXversion);
235 __glxHashDestroy(priv->glXDrawHash);
237 #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
238 __glxHashDestroy(priv->drawHash);
240 /* Free the direct rendering per display data */
241 if (priv->driswDisplay)
242 (*priv->driswDisplay->destroyDisplay) (priv->driswDisplay);
243 priv->driswDisplay = NULL;
245 if (priv->driDisplay)
246 (*priv->driDisplay->destroyDisplay) (priv->driDisplay);
247 priv->driDisplay = NULL;
249 if (priv->dri2Display)
250 (*priv->dri2Display->destroyDisplay) (priv->dri2Display);
251 priv->dri2Display = NULL;
258 __glXCloseDisplay(Display * dpy, XExtCodes * codes)
260 struct glx_display *priv, **prev;
262 _XLockMutex(_Xglobal_lock);
263 prev = &glx_displays;
264 for (priv = glx_displays; priv; prev = &priv->next, priv = priv->next) {
265 if (priv->dpy == dpy) {
270 _XUnlockMutex(_Xglobal_lock);
272 glx_display_free(priv);
278 ** Query the version of the GLX extension. This procedure works even if
279 ** the client extension is not completely set up.
282 QueryVersion(Display * dpy, int opcode, int *major, int *minor)
284 xcb_connection_t *c = XGetXCBConnection(dpy);
285 xcb_glx_query_version_reply_t *reply = xcb_glx_query_version_reply(c,
286 xcb_glx_query_version
295 if (reply->major_version != GLX_MAJOR_VERSION) {
299 *major = reply->major_version;
300 *minor = min(reply->minor_version, GLX_MINOR_VERSION);
306 * We don't want to enable this GLX_OML_swap_method in glxext.h,
307 * because we can't support it. The X server writes it out though,
308 * so we should handle it somehow, to avoid false warnings.
311 IGNORE_GLX_SWAP_METHOD_OML = 0x8060
316 convert_from_x_visual_type(int visualType)
318 static const int glx_visual_types[] = {
319 GLX_STATIC_GRAY, GLX_GRAY_SCALE,
320 GLX_STATIC_COLOR, GLX_PSEUDO_COLOR,
321 GLX_TRUE_COLOR, GLX_DIRECT_COLOR
324 if (visualType < ARRAY_SIZE(glx_visual_types))
325 return glx_visual_types[visualType];
331 * getVisualConfigs uses the !tagged_only path.
332 * getFBConfigs uses the tagged_only path.
335 __glXInitializeVisualConfigFromTags(struct glx_config * config, int count,
336 const INT32 * bp, Bool tagged_only,
337 Bool fbconfig_style_tags)
342 /* Copy in the first set of properties */
343 config->visualID = *bp++;
345 config->visualType = convert_from_x_visual_type(*bp++);
347 config->rgbMode = *bp++;
349 config->redBits = *bp++;
350 config->greenBits = *bp++;
351 config->blueBits = *bp++;
352 config->alphaBits = *bp++;
353 config->accumRedBits = *bp++;
354 config->accumGreenBits = *bp++;
355 config->accumBlueBits = *bp++;
356 config->accumAlphaBits = *bp++;
358 config->doubleBufferMode = *bp++;
359 config->stereoMode = *bp++;
361 config->rgbBits = *bp++;
362 config->depthBits = *bp++;
363 config->stencilBits = *bp++;
364 config->numAuxBuffers = *bp++;
365 config->level = *bp++;
367 #ifdef GLX_USE_APPLEGL
368 /* AppleSGLX supports pixmap and pbuffers with all config. */
369 config->drawableType = GLX_WINDOW_BIT | GLX_PIXMAP_BIT | GLX_PBUFFER_BIT;
370 /* Unfortunately this can create an ABI compatibility problem. */
373 count -= __GLX_MIN_CONFIG_PROPS;
378 ** Additional properties may be in a list at the end
379 ** of the reply. They are in pairs of property type
380 ** and property value.
383 #define FETCH_OR_SET(tag) \
384 config-> tag = ( fbconfig_style_tags ) ? *bp++ : 1
386 for (i = 0; i < count; i += 2) {
387 long int tag = *bp++;
391 FETCH_OR_SET(rgbMode);
393 case GLX_BUFFER_SIZE:
394 config->rgbBits = *bp++;
397 config->level = *bp++;
399 case GLX_DOUBLEBUFFER:
400 FETCH_OR_SET(doubleBufferMode);
403 FETCH_OR_SET(stereoMode);
405 case GLX_AUX_BUFFERS:
406 config->numAuxBuffers = *bp++;
409 config->redBits = *bp++;
412 config->greenBits = *bp++;
415 config->blueBits = *bp++;
418 config->alphaBits = *bp++;
421 config->depthBits = *bp++;
423 case GLX_STENCIL_SIZE:
424 config->stencilBits = *bp++;
426 case GLX_ACCUM_RED_SIZE:
427 config->accumRedBits = *bp++;
429 case GLX_ACCUM_GREEN_SIZE:
430 config->accumGreenBits = *bp++;
432 case GLX_ACCUM_BLUE_SIZE:
433 config->accumBlueBits = *bp++;
435 case GLX_ACCUM_ALPHA_SIZE:
436 config->accumAlphaBits = *bp++;
438 case GLX_VISUAL_CAVEAT_EXT:
439 config->visualRating = *bp++;
441 case GLX_X_VISUAL_TYPE:
442 config->visualType = *bp++;
444 case GLX_TRANSPARENT_TYPE:
445 config->transparentPixel = *bp++;
447 case GLX_TRANSPARENT_INDEX_VALUE:
448 config->transparentIndex = *bp++;
450 case GLX_TRANSPARENT_RED_VALUE:
451 config->transparentRed = *bp++;
453 case GLX_TRANSPARENT_GREEN_VALUE:
454 config->transparentGreen = *bp++;
456 case GLX_TRANSPARENT_BLUE_VALUE:
457 config->transparentBlue = *bp++;
459 case GLX_TRANSPARENT_ALPHA_VALUE:
460 config->transparentAlpha = *bp++;
463 config->visualID = *bp++;
465 case GLX_DRAWABLE_TYPE:
466 config->drawableType = *bp++;
467 #ifdef GLX_USE_APPLEGL
468 /* AppleSGLX supports pixmap and pbuffers with all config. */
469 config->drawableType |= GLX_WINDOW_BIT | GLX_PIXMAP_BIT | GLX_PBUFFER_BIT;
472 case GLX_RENDER_TYPE:
473 config->renderType = *bp++;
475 case GLX_X_RENDERABLE:
476 config->xRenderable = *bp++;
478 case GLX_FBCONFIG_ID:
479 config->fbconfigID = *bp++;
481 case GLX_MAX_PBUFFER_WIDTH:
482 config->maxPbufferWidth = *bp++;
484 case GLX_MAX_PBUFFER_HEIGHT:
485 config->maxPbufferHeight = *bp++;
487 case GLX_MAX_PBUFFER_PIXELS:
488 config->maxPbufferPixels = *bp++;
490 #ifndef GLX_USE_APPLEGL
491 case GLX_OPTIMAL_PBUFFER_WIDTH_SGIX:
492 config->optimalPbufferWidth = *bp++;
494 case GLX_OPTIMAL_PBUFFER_HEIGHT_SGIX:
495 config->optimalPbufferHeight = *bp++;
497 case GLX_VISUAL_SELECT_GROUP_SGIX:
498 config->visualSelectGroup = *bp++;
500 case GLX_SWAP_METHOD_OML:
501 config->swapMethod = *bp++;
504 case GLX_SAMPLE_BUFFERS_SGIS:
505 config->sampleBuffers = *bp++;
507 case GLX_SAMPLES_SGIS:
508 config->samples = *bp++;
510 #ifdef GLX_USE_APPLEGL
511 case IGNORE_GLX_SWAP_METHOD_OML:
512 /* We ignore this tag. See the comment above this function. */
516 case GLX_BIND_TO_TEXTURE_RGB_EXT:
517 config->bindToTextureRgb = *bp++;
519 case GLX_BIND_TO_TEXTURE_RGBA_EXT:
520 config->bindToTextureRgba = *bp++;
522 case GLX_BIND_TO_MIPMAP_TEXTURE_EXT:
523 config->bindToMipmapTexture = *bp++;
525 case GLX_BIND_TO_TEXTURE_TARGETS_EXT:
526 config->bindToTextureTargets = *bp++;
528 case GLX_Y_INVERTED_EXT:
529 config->yInverted = *bp++;
532 case GLX_FRAMEBUFFER_SRGB_CAPABLE_EXT:
533 config->sRGBCapable = *bp++;
537 if (fbconfig_style_tags)
544 if(getenv("LIBGL_DIAGNOSTIC")) {
545 long int tagvalue = *bp++;
546 fprintf(stderr, "WARNING: unknown GLX tag from server: "
547 "tag 0x%lx value 0x%lx\n", tag, tagvalue);
549 /* Ignore the unrecognized tag's value */
557 (config->rgbMode) ? GLX_RGBA_BIT : GLX_COLOR_INDEX_BIT;
560 static struct glx_config *
561 createConfigsFromProperties(Display * dpy, int nvisuals, int nprops,
562 int screen, GLboolean tagged_only)
564 INT32 buf[__GLX_TOTAL_CONFIG], *props;
566 struct glx_config *modes, *m;
572 /* FIXME: Is the __GLX_MIN_CONFIG_PROPS test correct for FBconfigs? */
574 /* Check number of properties */
575 if (nprops < __GLX_MIN_CONFIG_PROPS || nprops > __GLX_MAX_CONFIG_PROPS)
578 /* Allocate memory for our config structure */
579 modes = glx_config_create_list(nvisuals);
583 prop_size = nprops * __GLX_SIZE_INT32;
584 if (prop_size <= sizeof(buf))
587 props = malloc(prop_size);
589 /* Read each config structure and convert it into our format */
591 for (i = 0; i < nvisuals; i++) {
592 _XRead(dpy, (char *) props, prop_size);
593 #ifdef GLX_USE_APPLEGL
594 /* Older X servers don't send this so we default it here. */
595 m->drawableType = GLX_WINDOW_BIT;
598 * The XQuartz 2.3.2.1 X server doesn't set this properly, so
599 * set the proper bits here.
600 * AppleSGLX supports windows, pixmaps, and pbuffers with all config.
602 m->drawableType = GLX_WINDOW_BIT | GLX_PIXMAP_BIT | GLX_PBUFFER_BIT;
604 __glXInitializeVisualConfigFromTags(m, nprops, props,
605 tagged_only, GL_TRUE);
617 getVisualConfigs(struct glx_screen *psc,
618 struct glx_display *priv, int screen)
620 xGLXGetVisualConfigsReq *req;
621 xGLXGetVisualConfigsReply reply;
622 Display *dpy = priv->dpy;
627 GetReq(GLXGetVisualConfigs, req);
628 req->reqType = priv->majorOpcode;
629 req->glxCode = X_GLXGetVisualConfigs;
630 req->screen = screen;
632 if (!_XReply(dpy, (xReply *) & reply, 0, False))
635 psc->visuals = createConfigsFromProperties(dpy,
642 return psc->visuals != NULL;
646 getFBConfigs(struct glx_screen *psc, struct glx_display *priv, int screen)
648 xGLXGetFBConfigsReq *fb_req;
649 xGLXGetFBConfigsSGIXReq *sgi_req;
650 xGLXVendorPrivateWithReplyReq *vpreq;
651 xGLXGetFBConfigsReply reply;
652 Display *dpy = priv->dpy;
655 __glXQueryServerString(dpy, priv->majorOpcode, screen, GLX_EXTENSIONS);
660 if (atof(priv->serverGLXversion) >= 1.3) {
661 GetReq(GLXGetFBConfigs, fb_req);
662 fb_req->reqType = priv->majorOpcode;
663 fb_req->glxCode = X_GLXGetFBConfigs;
664 fb_req->screen = screen;
666 else if (strstr(psc->serverGLXexts, "GLX_SGIX_fbconfig") != NULL) {
667 GetReqExtra(GLXVendorPrivateWithReply,
668 sz_xGLXGetFBConfigsSGIXReq -
669 sz_xGLXVendorPrivateWithReplyReq, vpreq);
670 sgi_req = (xGLXGetFBConfigsSGIXReq *) vpreq;
671 sgi_req->reqType = priv->majorOpcode;
672 sgi_req->glxCode = X_GLXVendorPrivateWithReply;
673 sgi_req->vendorCode = X_GLXvop_GetFBConfigsSGIX;
674 sgi_req->screen = screen;
679 if (!_XReply(dpy, (xReply *) & reply, 0, False))
682 psc->configs = createConfigsFromProperties(dpy,
684 reply.numAttribs * 2,
689 return psc->configs != NULL;
693 glx_screen_init(struct glx_screen *psc,
694 int screen, struct glx_display * priv)
696 /* Initialize per screen dynamic client GLX extensions */
697 psc->ext_list_first_time = GL_TRUE;
699 psc->dpy = priv->dpy;
702 getVisualConfigs(psc, priv, screen);
703 getFBConfigs(psc, priv, screen);
709 glx_screen_cleanup(struct glx_screen *psc)
712 glx_config_destroy_list(psc->configs);
713 free(psc->effectiveGLXexts);
714 psc->configs = NULL; /* NOTE: just for paranoia */
717 glx_config_destroy_list(psc->visuals);
718 psc->visuals = NULL; /* NOTE: just for paranoia */
720 free((char *) psc->serverGLXexts);
724 ** Allocate the memory for the per screen configs for each screen.
725 ** If that works then fetch the per screen configs data.
728 AllocAndFetchScreenConfigs(Display * dpy, struct glx_display * priv)
730 struct glx_screen *psc;
734 ** First allocate memory for the array of per screen configs.
736 screens = ScreenCount(dpy);
737 priv->screens = malloc(screens * sizeof *priv->screens);
741 priv->serverGLXversion =
742 __glXQueryServerString(dpy, priv->majorOpcode, 0, GLX_VERSION);
743 if (priv->serverGLXversion == NULL) {
744 FreeScreenConfigs(priv);
748 for (i = 0; i < screens; i++, psc++) {
750 #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
751 if (priv->dri2Display)
752 psc = (*priv->dri2Display->createScreen) (i, priv);
753 if (psc == NULL && priv->driDisplay)
754 psc = (*priv->driDisplay->createScreen) (i, priv);
755 if (psc == NULL && priv->driswDisplay)
756 psc = (*priv->driswDisplay->createScreen) (i, priv);
758 #if defined(GLX_USE_APPLEGL)
760 psc = applegl_create_screen(i, priv);
763 psc = indirect_create_screen(i, priv);
765 priv->screens[i] = psc;
772 ** Initialize the client side extension code.
774 _X_HIDDEN struct glx_display *
775 __glXInitialize(Display * dpy)
777 struct glx_display *dpyPriv, *d;
778 #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
779 Bool glx_direct, glx_accel;
783 _XLockMutex(_Xglobal_lock);
785 for (dpyPriv = glx_displays; dpyPriv; dpyPriv = dpyPriv->next) {
786 if (dpyPriv->dpy == dpy) {
787 _XUnlockMutex(_Xglobal_lock);
792 /* Drop the lock while we create the display private. */
793 _XUnlockMutex(_Xglobal_lock);
795 dpyPriv = calloc(1, sizeof *dpyPriv);
799 dpyPriv->codes = XInitExtension(dpy, __glXExtensionName);
800 if (!dpyPriv->codes) {
802 _XUnlockMutex(_Xglobal_lock);
807 dpyPriv->majorOpcode = dpyPriv->codes->major_opcode;
808 dpyPriv->serverGLXvendor = 0x0;
809 dpyPriv->serverGLXversion = 0x0;
811 /* See if the versions are compatible. This GLX implementation does not
812 * work with servers that only support GLX 1.0.
814 if (!QueryVersion(dpy, dpyPriv->majorOpcode,
815 &dpyPriv->majorVersion, &dpyPriv->minorVersion)
816 || (dpyPriv->majorVersion == 1 && dpyPriv->minorVersion < 1)) {
818 _XUnlockMutex(_Xglobal_lock);
822 for (i = 0; i < __GLX_NUMBER_EVENTS; i++) {
823 XESetWireToEvent(dpy, dpyPriv->codes->first_event + i, __glXWireToEvent);
824 XESetEventToWire(dpy, dpyPriv->codes->first_event + i, __glXEventToWire);
827 XESetCloseDisplay(dpy, dpyPriv->codes->extension, __glXCloseDisplay);
828 XESetErrorString (dpy, dpyPriv->codes->extension,__glXErrorString);
830 dpyPriv->glXDrawHash = __glxHashCreate();
832 #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
833 glx_direct = (getenv("LIBGL_ALWAYS_INDIRECT") == NULL);
834 glx_accel = (getenv("LIBGL_ALWAYS_SOFTWARE") == NULL);
836 dpyPriv->drawHash = __glxHashCreate();
839 ** Initialize the direct rendering per display data and functions.
840 ** Note: This _must_ be done before calling any other DRI routines
841 ** (e.g., those called in AllocAndFetchScreenConfigs).
843 if (glx_direct && glx_accel) {
844 dpyPriv->dri2Display = dri2CreateDisplay(dpy);
845 dpyPriv->driDisplay = driCreateDisplay(dpy);
848 dpyPriv->driswDisplay = driswCreateDisplay(dpy);
851 #ifdef GLX_USE_APPLEGL
852 if (!applegl_create_display(dpyPriv)) {
857 if (!AllocAndFetchScreenConfigs(dpy, dpyPriv)) {
862 __glX_send_client_info(dpyPriv);
864 /* Grab the lock again and add the dispay private, unless somebody
865 * beat us to initializing on this display in the meantime. */
866 _XLockMutex(_Xglobal_lock);
868 for (d = glx_displays; d; d = d->next) {
870 _XUnlockMutex(_Xglobal_lock);
871 glx_display_free(dpyPriv);
876 dpyPriv->next = glx_displays;
877 glx_displays = dpyPriv;
879 _XUnlockMutex(_Xglobal_lock);
885 ** Setup for sending a GLX command on dpy. Make sure the extension is
886 ** initialized. Try to avoid calling __glXInitialize as its kinda slow.
889 __glXSetupForCommand(Display * dpy)
891 struct glx_context *gc;
892 struct glx_display *priv;
894 /* If this thread has a current context, flush its rendering commands */
895 gc = __glXGetCurrentContext();
896 if (gc->currentDpy) {
897 /* Flush rendering buffer of the current context, if any */
898 (void) __glXFlushRenderBuffer(gc, gc->pc);
900 if (gc->currentDpy == dpy) {
901 /* Use opcode from gc because its right */
902 return gc->majorOpcode;
906 ** Have to get info about argument dpy because it might be to
907 ** a different server
912 /* Forced to lookup extension via the slow initialize route */
913 priv = __glXInitialize(dpy);
917 return priv->majorOpcode;
921 * Flush the drawing command transport buffer.
923 * \param ctx Context whose transport buffer is to be flushed.
924 * \param pc Pointer to first unused buffer location.
927 * Modify this function to use \c ctx->pc instead of the explicit
931 __glXFlushRenderBuffer(struct glx_context * ctx, GLubyte * pc)
933 Display *const dpy = ctx->currentDpy;
934 xcb_connection_t *c = XGetXCBConnection(dpy);
935 const GLint size = pc - ctx->buf;
937 if ((dpy != NULL) && (size > 0)) {
938 xcb_glx_render(c, ctx->currentContextTag, size,
939 (const uint8_t *) ctx->buf);
942 /* Reset pointer and return it */
949 * Send a portion of a GLXRenderLarge command to the server. The advantage of
950 * this function over \c __glXSendLargeCommand is that callers can use the
951 * data buffer in the GLX context and may be able to avoid allocating an
952 * extra buffer. The disadvantage is the clients will have to do more
953 * GLX protocol work (i.e., calculating \c totalRequests, etc.).
955 * \sa __glXSendLargeCommand
957 * \param gc GLX context
958 * \param requestNumber Which part of the whole command is this? The first
960 * \param totalRequests How many requests will there be?
961 * \param data Command data.
962 * \param dataLen Size, in bytes, of the command data.
965 __glXSendLargeChunk(struct glx_context * gc, GLint requestNumber,
966 GLint totalRequests, const GLvoid * data, GLint dataLen)
968 Display *dpy = gc->currentDpy;
969 xcb_connection_t *c = XGetXCBConnection(dpy);
970 xcb_glx_render_large(c, gc->currentContextTag, requestNumber,
971 totalRequests, dataLen, data);
976 * Send a command that is too large for the GLXRender protocol request.
978 * Send a large command, one that is too large for some reason to
979 * send using the GLXRender protocol request. One reason to send
980 * a large command is to avoid copying the data.
982 * \param ctx GLX context
983 * \param header Header data.
984 * \param headerLen Size, in bytes, of the header data. It is assumed that
985 * the header data will always be small enough to fit in
986 * a single X protocol packet.
987 * \param data Command data.
988 * \param dataLen Size, in bytes, of the command data.
991 __glXSendLargeCommand(struct glx_context * ctx,
992 const GLvoid * header, GLint headerLen,
993 const GLvoid * data, GLint dataLen)
996 GLint totalRequests, requestNumber;
999 ** Calculate the maximum amount of data can be stuffed into a single
1000 ** packet. sz_xGLXRenderReq is added because bufSize is the maximum
1001 ** packet size minus sz_xGLXRenderReq.
1003 maxSize = (ctx->bufSize + sz_xGLXRenderReq) - sz_xGLXRenderLargeReq;
1004 totalRequests = 1 + (dataLen / maxSize);
1005 if (dataLen % maxSize)
1009 ** Send all of the command, except the large array, as one request.
1011 assert(headerLen <= maxSize);
1012 __glXSendLargeChunk(ctx, 1, totalRequests, header, headerLen);
1015 ** Send enough requests until the whole array is sent.
1017 for (requestNumber = 2; requestNumber <= (totalRequests - 1);
1019 __glXSendLargeChunk(ctx, requestNumber, totalRequests, data, maxSize);
1020 data = (const GLvoid *) (((const GLubyte *) data) + maxSize);
1022 assert(dataLen > 0);
1025 assert(dataLen <= maxSize);
1026 __glXSendLargeChunk(ctx, requestNumber, totalRequests, data, dataLen);
1029 /************************************************************************/
1033 __glXDumpDrawBuffer(struct glx_context * ctx)
1035 GLubyte *p = ctx->buf;
1036 GLubyte *end = ctx->pc;
1037 GLushort opcode, length;
1041 opcode = *((GLushort *) p);
1042 length = *((GLushort *) (p + 2));
1043 printf("%2x: %5d: ", opcode, length);
1046 while (length > 0) {
1047 printf("%08x ", *((unsigned *) p));