/* * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008) * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved. * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Software"), * to deal in the Software without restriction, including without limitation * the rights to use, copy, modify, merge, publish, distribute, sublicense, * and/or sell copies of the Software, and to permit persons to whom the * Software is furnished to do so, subject to the following conditions: * * The above copyright notice including the dates of first publication and * either this permission notice or a reference to * http://oss.sgi.com/projects/FreeB/ * shall be included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. * * Except as contained in this notice, the name of Silicon Graphics, Inc. * shall not be used in advertising or otherwise to promote the sale, use or * other dealings in this Software without prior written authorization from * Silicon Graphics, Inc. */ /** * \file glxext.c * GLX protocol interface boot-strap code. * * Direct rendering support added by Precision Insight, Inc. * * \author Kevin E. Martin */ #include #include "glxclient.h" #include #include #include #include "glxextensions.h" #include "glcontextmodes.h" #ifdef USE_XCB #include #include #include #endif #ifdef DEBUG void __glXDumpDrawBuffer(__GLXcontext * ctx); #endif /* ** You can set this cell to 1 to force the gl drawing stuff to be ** one command per packet */ _X_HIDDEN int __glXDebug = 0; /* Extension required boiler plate */ static char *__glXExtensionName = GLX_EXTENSION_NAME; XExtensionInfo *__glXExtensionInfo = NULL; static /* const */ char *error_list[] = { "GLXBadContext", "GLXBadContextState", "GLXBadDrawable", "GLXBadPixmap", "GLXBadContextTag", "GLXBadCurrentWindow", "GLXBadRenderRequest", "GLXBadLargeRequest", "GLXUnsupportedPrivateRequest", "GLXBadFBConfig", "GLXBadPbuffer", "GLXBadCurrentDrawable", "GLXBadWindow", }; static int __glXCloseDisplay(Display * dpy, XExtCodes * codes) { GLXContext gc; gc = __glXGetCurrentContext(); if (dpy == gc->currentDpy) { __glXSetCurrentContextNull(); __glXFreeContext(gc); } return XextRemoveDisplay(__glXExtensionInfo, dpy); } static XEXT_GENERATE_ERROR_STRING(__glXErrorString, __glXExtensionName, __GLX_NUMBER_ERRORS, error_list) static Bool __glXWireToEvent(Display *dpy, XEvent *event, xEvent *wire); static Status __glXEventToWire(Display *dpy, XEvent *event, xEvent *wire); static /* const */ XExtensionHooks __glXExtensionHooks = { NULL, /* create_gc */ NULL, /* copy_gc */ NULL, /* flush_gc */ NULL, /* free_gc */ NULL, /* create_font */ NULL, /* free_font */ __glXCloseDisplay, /* close_display */ __glXWireToEvent, /* wire_to_event */ __glXEventToWire, /* event_to_wire */ NULL, /* error */ __glXErrorString, /* error_string */ }; XEXT_GENERATE_FIND_DISPLAY(__glXFindDisplay, __glXExtensionInfo, __glXExtensionName, &__glXExtensionHooks, __GLX_NUMBER_EVENTS, NULL) /* * GLX events are a bit funky. We don't stuff the X event code into * our user exposed (via XNextEvent) structure. Instead we use the GLX * private event code namespace (and hope it doesn't conflict). Clients * have to know that bit 15 in the event type field means they're getting * a GLX event, and then handle the various sub-event types there, rather * than simply checking the event code and handling it directly. */ static Bool __glXWireToEvent(Display *dpy, XEvent *event, xEvent *wire) { XExtDisplayInfo *info = __glXFindDisplay(dpy); XextCheckExtension(dpy, info, __glXExtensionName, False); switch ((wire->u.u.type & 0x7f) - info->codes->first_event) { case GLX_PbufferClobber: { GLXPbufferClobberEvent *aevent = (GLXPbufferClobberEvent *)event; xGLXPbufferClobberEvent *awire = (xGLXPbufferClobberEvent *)wire; aevent->event_type = awire->type; aevent->serial = awire->sequenceNumber; aevent->event_type = awire->event_type; aevent->draw_type = awire->draw_type; aevent->drawable = awire->drawable; aevent->buffer_mask = awire->buffer_mask; aevent->aux_buffer = awire->aux_buffer; aevent->x = awire->x; aevent->y = awire->y; aevent->width = awire->width; aevent->height = awire->height; aevent->count = awire->count; return True; } /* No easy symbol to test for this, as GLX_BufferSwapComplete is * defined in the local glx.h header, but the * xGLXBufferSwapComplete typedef is only available in new versions * of the external glxproto.h header, which doesn't have any * testable versioning define. * * I'll use the related DRI2 define, in the hope that we won't * receive these events unless we know how to ask for them: */ #ifdef X_DRI2SwapBuffers case GLX_BufferSwapComplete: { GLXBufferSwapComplete *aevent = (GLXBufferSwapComplete *)event; xGLXBufferSwapComplete *awire = (xGLXBufferSwapComplete *)wire; aevent->event_type = awire->event_type; aevent->drawable = awire->drawable; aevent->ust = ((CARD64)awire->ust_hi << 32) | awire->ust_lo; aevent->msc = ((CARD64)awire->msc_hi << 32) | awire->msc_lo; aevent->sbc = ((CARD64)awire->sbc_hi << 32) | awire->sbc_lo; return True; } #endif default: /* client doesn't support server event */ break; } return False; } /* We don't actually support this. It doesn't make sense for clients to * send each other GLX events. */ static Status __glXEventToWire(Display *dpy, XEvent *event, xEvent *wire) { XExtDisplayInfo *info = __glXFindDisplay(dpy); XextCheckExtension(dpy, info, __glXExtensionName, False); switch (event->type) { case GLX_DAMAGED: break; case GLX_SAVED: break; case GLX_EXCHANGE_COMPLETE_INTEL: break; case GLX_BLIT_COMPLETE_INTEL: break; case GLX_FLIP_COMPLETE_INTEL: break; default: /* client doesn't support server event */ break; } return Success; } /************************************************************************/ /* ** Free the per screen configs data as well as the array of ** __glXScreenConfigs. */ static void FreeScreenConfigs(__GLXdisplayPrivate * priv) { __GLXscreenConfigs *psc; GLint i, screens; /* Free screen configuration information */ psc = priv->screenConfigs; screens = ScreenCount(priv->dpy); for (i = 0; i < screens; i++, psc++) { if (psc->configs) { _gl_context_modes_destroy(psc->configs); if (psc->effectiveGLXexts) Xfree(psc->effectiveGLXexts); psc->configs = NULL; /* NOTE: just for paranoia */ } if (psc->visuals) { _gl_context_modes_destroy(psc->visuals); psc->visuals = NULL; /* NOTE: just for paranoia */ } Xfree((char *) psc->serverGLXexts); #ifdef GLX_DIRECT_RENDERING if (psc->driver_configs) { unsigned int j; for (j = 0; psc->driver_configs[j]; j++) free((__DRIconfig *) psc->driver_configs[j]); free(psc->driver_configs); psc->driver_configs = NULL; } if (psc->driScreen) { psc->driScreen->destroyScreen(psc); __glxHashDestroy(psc->drawHash); XFree(psc->driScreen); psc->driScreen = NULL; } #endif } XFree((char *) priv->screenConfigs); priv->screenConfigs = NULL; } /* ** Release the private memory referred to in a display private ** structure. The caller will free the extension structure. */ static int __glXFreeDisplayPrivate(XExtData * extension) { __GLXdisplayPrivate *priv; priv = (__GLXdisplayPrivate *) extension->private_data; FreeScreenConfigs(priv); if (priv->serverGLXvendor) { Xfree((char *) priv->serverGLXvendor); priv->serverGLXvendor = 0x0; /* to protect against double free's */ } if (priv->serverGLXversion) { Xfree((char *) priv->serverGLXversion); priv->serverGLXversion = 0x0; /* to protect against double free's */ } #ifdef GLX_DIRECT_RENDERING /* Free the direct rendering per display data */ if (priv->driswDisplay) (*priv->driswDisplay->destroyDisplay) (priv->driswDisplay); priv->driswDisplay = NULL; if (priv->driDisplay) (*priv->driDisplay->destroyDisplay) (priv->driDisplay); priv->driDisplay = NULL; if (priv->dri2Display) (*priv->dri2Display->destroyDisplay) (priv->dri2Display); priv->dri2Display = NULL; #endif Xfree((char *) priv); return 0; } /************************************************************************/ /* ** Query the version of the GLX extension. This procedure works even if ** the client extension is not completely set up. */ static Bool QueryVersion(Display * dpy, int opcode, int *major, int *minor) { #ifdef USE_XCB xcb_connection_t *c = XGetXCBConnection(dpy); xcb_glx_query_version_reply_t *reply = xcb_glx_query_version_reply(c, xcb_glx_query_version (c, GLX_MAJOR_VERSION, GLX_MINOR_VERSION), NULL); if (reply->major_version != GLX_MAJOR_VERSION) { free(reply); return GL_FALSE; } *major = reply->major_version; *minor = min(reply->minor_version, GLX_MINOR_VERSION); free(reply); return GL_TRUE; #else xGLXQueryVersionReq *req; xGLXQueryVersionReply reply; /* Send the glXQueryVersion request */ LockDisplay(dpy); GetReq(GLXQueryVersion, req); req->reqType = opcode; req->glxCode = X_GLXQueryVersion; req->majorVersion = GLX_MAJOR_VERSION; req->minorVersion = GLX_MINOR_VERSION; _XReply(dpy, (xReply *) & reply, 0, False); UnlockDisplay(dpy); SyncHandle(); if (reply.majorVersion != GLX_MAJOR_VERSION) { /* ** The server does not support the same major release as this ** client. */ return GL_FALSE; } *major = reply.majorVersion; *minor = min(reply.minorVersion, GLX_MINOR_VERSION); return GL_TRUE; #endif /* USE_XCB */ } _X_HIDDEN void __glXInitializeVisualConfigFromTags(__GLcontextModes * config, int count, const INT32 * bp, Bool tagged_only, Bool fbconfig_style_tags) { int i; if (!tagged_only) { /* Copy in the first set of properties */ config->visualID = *bp++; config->visualType = _gl_convert_from_x_visual_type(*bp++); config->rgbMode = *bp++; config->redBits = *bp++; config->greenBits = *bp++; config->blueBits = *bp++; config->alphaBits = *bp++; config->accumRedBits = *bp++; config->accumGreenBits = *bp++; config->accumBlueBits = *bp++; config->accumAlphaBits = *bp++; config->doubleBufferMode = *bp++; config->stereoMode = *bp++; config->rgbBits = *bp++; config->depthBits = *bp++; config->stencilBits = *bp++; config->numAuxBuffers = *bp++; config->level = *bp++; count -= __GLX_MIN_CONFIG_PROPS; } /* ** Additional properties may be in a list at the end ** of the reply. They are in pairs of property type ** and property value. */ #define FETCH_OR_SET(tag) \ config-> tag = ( fbconfig_style_tags ) ? *bp++ : 1 for (i = 0; i < count; i += 2) { switch (*bp++) { case GLX_RGBA: FETCH_OR_SET(rgbMode); break; case GLX_BUFFER_SIZE: config->rgbBits = *bp++; break; case GLX_LEVEL: config->level = *bp++; break; case GLX_DOUBLEBUFFER: FETCH_OR_SET(doubleBufferMode); break; case GLX_STEREO: FETCH_OR_SET(stereoMode); break; case GLX_AUX_BUFFERS: config->numAuxBuffers = *bp++; break; case GLX_RED_SIZE: config->redBits = *bp++; break; case GLX_GREEN_SIZE: config->greenBits = *bp++; break; case GLX_BLUE_SIZE: config->blueBits = *bp++; break; case GLX_ALPHA_SIZE: config->alphaBits = *bp++; break; case GLX_DEPTH_SIZE: config->depthBits = *bp++; break; case GLX_STENCIL_SIZE: config->stencilBits = *bp++; break; case GLX_ACCUM_RED_SIZE: config->accumRedBits = *bp++; break; case GLX_ACCUM_GREEN_SIZE: config->accumGreenBits = *bp++; break; case GLX_ACCUM_BLUE_SIZE: config->accumBlueBits = *bp++; break; case GLX_ACCUM_ALPHA_SIZE: config->accumAlphaBits = *bp++; break; case GLX_VISUAL_CAVEAT_EXT: config->visualRating = *bp++; break; case GLX_X_VISUAL_TYPE: config->visualType = *bp++; break; case GLX_TRANSPARENT_TYPE: config->transparentPixel = *bp++; break; case GLX_TRANSPARENT_INDEX_VALUE: config->transparentIndex = *bp++; break; case GLX_TRANSPARENT_RED_VALUE: config->transparentRed = *bp++; break; case GLX_TRANSPARENT_GREEN_VALUE: config->transparentGreen = *bp++; break; case GLX_TRANSPARENT_BLUE_VALUE: config->transparentBlue = *bp++; break; case GLX_TRANSPARENT_ALPHA_VALUE: config->transparentAlpha = *bp++; break; case GLX_VISUAL_ID: config->visualID = *bp++; break; case GLX_DRAWABLE_TYPE: config->drawableType = *bp++; break; case GLX_RENDER_TYPE: config->renderType = *bp++; break; case GLX_X_RENDERABLE: config->xRenderable = *bp++; break; case GLX_FBCONFIG_ID: config->fbconfigID = *bp++; break; case GLX_MAX_PBUFFER_WIDTH: config->maxPbufferWidth = *bp++; break; case GLX_MAX_PBUFFER_HEIGHT: config->maxPbufferHeight = *bp++; break; case GLX_MAX_PBUFFER_PIXELS: config->maxPbufferPixels = *bp++; break; case GLX_OPTIMAL_PBUFFER_WIDTH_SGIX: config->optimalPbufferWidth = *bp++; break; case GLX_OPTIMAL_PBUFFER_HEIGHT_SGIX: config->optimalPbufferHeight = *bp++; break; case GLX_VISUAL_SELECT_GROUP_SGIX: config->visualSelectGroup = *bp++; break; case GLX_SWAP_METHOD_OML: config->swapMethod = *bp++; break; case GLX_SAMPLE_BUFFERS_SGIS: config->sampleBuffers = *bp++; break; case GLX_SAMPLES_SGIS: config->samples = *bp++; break; case GLX_BIND_TO_TEXTURE_RGB_EXT: config->bindToTextureRgb = *bp++; break; case GLX_BIND_TO_TEXTURE_RGBA_EXT: config->bindToTextureRgba = *bp++; break; case GLX_BIND_TO_MIPMAP_TEXTURE_EXT: config->bindToMipmapTexture = *bp++; break; case GLX_BIND_TO_TEXTURE_TARGETS_EXT: config->bindToTextureTargets = *bp++; break; case GLX_Y_INVERTED_EXT: config->yInverted = *bp++; break; case None: i = count; break; default: break; } } config->renderType = (config->rgbMode) ? GLX_RGBA_BIT : GLX_COLOR_INDEX_BIT; config->haveAccumBuffer = ((config->accumRedBits + config->accumGreenBits + config->accumBlueBits + config->accumAlphaBits) > 0); config->haveDepthBuffer = (config->depthBits > 0); config->haveStencilBuffer = (config->stencilBits > 0); } static __GLcontextModes * createConfigsFromProperties(Display * dpy, int nvisuals, int nprops, int screen, GLboolean tagged_only) { INT32 buf[__GLX_TOTAL_CONFIG], *props; unsigned prop_size; __GLcontextModes *modes, *m; int i; if (nprops == 0) return NULL; /* FIXME: Is the __GLX_MIN_CONFIG_PROPS test correct for FBconfigs? */ /* Check number of properties */ if (nprops < __GLX_MIN_CONFIG_PROPS || nprops > __GLX_MAX_CONFIG_PROPS) return NULL; /* Allocate memory for our config structure */ modes = _gl_context_modes_create(nvisuals, sizeof(__GLcontextModes)); if (!modes) return NULL; prop_size = nprops * __GLX_SIZE_INT32; if (prop_size <= sizeof(buf)) props = buf; else props = Xmalloc(prop_size); /* Read each config structure and convert it into our format */ m = modes; for (i = 0; i < nvisuals; i++) { _XRead(dpy, (char *) props, prop_size); /* Older X servers don't send this so we default it here. */ m->drawableType = GLX_WINDOW_BIT; __glXInitializeVisualConfigFromTags(m, nprops, props, tagged_only, GL_TRUE); m->screen = screen; m = m->next; } if (props != buf) Xfree(props); return modes; } static GLboolean getVisualConfigs(Display * dpy, __GLXdisplayPrivate * priv, int screen) { xGLXGetVisualConfigsReq *req; __GLXscreenConfigs *psc; xGLXGetVisualConfigsReply reply; LockDisplay(dpy); psc = priv->screenConfigs + screen; psc->visuals = NULL; GetReq(GLXGetVisualConfigs, req); req->reqType = priv->majorOpcode; req->glxCode = X_GLXGetVisualConfigs; req->screen = screen; if (!_XReply(dpy, (xReply *) & reply, 0, False)) goto out; psc->visuals = createConfigsFromProperties(dpy, reply.numVisuals, reply.numProps, screen, GL_FALSE); out: UnlockDisplay(dpy); return psc->visuals != NULL; } static GLboolean getFBConfigs(Display * dpy, __GLXdisplayPrivate * priv, int screen) { xGLXGetFBConfigsReq *fb_req; xGLXGetFBConfigsSGIXReq *sgi_req; xGLXVendorPrivateWithReplyReq *vpreq; xGLXGetFBConfigsReply reply; __GLXscreenConfigs *psc; psc = priv->screenConfigs + screen; psc->serverGLXexts = __glXQueryServerString(dpy, priv->majorOpcode, screen, GLX_EXTENSIONS); LockDisplay(dpy); psc->configs = NULL; if (atof(priv->serverGLXversion) >= 1.3) { GetReq(GLXGetFBConfigs, fb_req); fb_req->reqType = priv->majorOpcode; fb_req->glxCode = X_GLXGetFBConfigs; fb_req->screen = screen; } else if (strstr(psc->serverGLXexts, "GLX_SGIX_fbconfig") != NULL) { GetReqExtra(GLXVendorPrivateWithReply, sz_xGLXGetFBConfigsSGIXReq + sz_xGLXVendorPrivateWithReplyReq, vpreq); sgi_req = (xGLXGetFBConfigsSGIXReq *) vpreq; sgi_req->reqType = priv->majorOpcode; sgi_req->glxCode = X_GLXVendorPrivateWithReply; sgi_req->vendorCode = X_GLXvop_GetFBConfigsSGIX; sgi_req->screen = screen; } else goto out; if (!_XReply(dpy, (xReply *) & reply, 0, False)) goto out; psc->configs = createConfigsFromProperties(dpy, reply.numFBConfigs, reply.numAttribs * 2, screen, GL_TRUE); out: UnlockDisplay(dpy); return psc->configs != NULL; } /* ** Allocate the memory for the per screen configs for each screen. ** If that works then fetch the per screen configs data. */ static Bool AllocAndFetchScreenConfigs(Display * dpy, __GLXdisplayPrivate * priv) { __GLXscreenConfigs *psc; GLint i, screens; /* ** First allocate memory for the array of per screen configs. */ screens = ScreenCount(dpy); psc = (__GLXscreenConfigs *) Xmalloc(screens * sizeof(__GLXscreenConfigs)); if (!psc) { return GL_FALSE; } memset(psc, 0, screens * sizeof(__GLXscreenConfigs)); priv->screenConfigs = psc; priv->serverGLXversion = __glXQueryServerString(dpy, priv->majorOpcode, 0, GLX_VERSION); if (priv->serverGLXversion == NULL) { FreeScreenConfigs(priv); return GL_FALSE; } for (i = 0; i < screens; i++, psc++) { getVisualConfigs(dpy, priv, i); getFBConfigs(dpy, priv, i); #ifdef GLX_DIRECT_RENDERING psc->scr = i; psc->dpy = dpy; psc->drawHash = __glxHashCreate(); if (psc->drawHash == NULL) continue; if (priv->dri2Display) psc->driScreen = (*priv->dri2Display->createScreen) (psc, i, priv); if (psc->driScreen == NULL && priv->driDisplay) psc->driScreen = (*priv->driDisplay->createScreen) (psc, i, priv); if (psc->driScreen == NULL && priv->driswDisplay) psc->driScreen = (*priv->driswDisplay->createScreen) (psc, i, priv); if (psc->driScreen == NULL) { __glxHashDestroy(psc->drawHash); psc->drawHash = NULL; } #endif } SyncHandle(); return GL_TRUE; } /* ** Initialize the client side extension code. */ _X_HIDDEN __GLXdisplayPrivate * __glXInitialize(Display * dpy) { XExtDisplayInfo *info = __glXFindDisplay(dpy); XExtData **privList, *private, *found; __GLXdisplayPrivate *dpyPriv; XEDataObject dataObj; int major, minor; #ifdef GLX_DIRECT_RENDERING Bool glx_direct, glx_accel; #endif /* The one and only long long lock */ __glXLock(); if (!XextHasExtension(info)) { /* No GLX extension supported by this server. Oh well. */ __glXUnlock(); XMissingExtension(dpy, __glXExtensionName); return 0; } /* See if a display private already exists. If so, return it */ dataObj.display = dpy; privList = XEHeadOfExtensionList(dataObj); found = XFindOnExtensionList(privList, info->codes->extension); if (found) { __glXUnlock(); return (__GLXdisplayPrivate *) found->private_data; } /* See if the versions are compatible */ if (!QueryVersion(dpy, info->codes->major_opcode, &major, &minor)) { /* The client and server do not agree on versions. Punt. */ __glXUnlock(); return 0; } /* ** Allocate memory for all the pieces needed for this buffer. */ private = (XExtData *) Xmalloc(sizeof(XExtData)); if (!private) { __glXUnlock(); return 0; } dpyPriv = (__GLXdisplayPrivate *) Xcalloc(1, sizeof(__GLXdisplayPrivate)); if (!dpyPriv) { __glXUnlock(); Xfree((char *) private); return 0; } /* ** Init the display private and then read in the screen config ** structures from the server. */ dpyPriv->majorOpcode = info->codes->major_opcode; dpyPriv->majorVersion = major; dpyPriv->minorVersion = minor; dpyPriv->dpy = dpy; dpyPriv->serverGLXvendor = 0x0; dpyPriv->serverGLXversion = 0x0; #ifdef GLX_DIRECT_RENDERING glx_direct = (getenv("LIBGL_ALWAYS_INDIRECT") == NULL); glx_accel = (getenv("LIBGL_ALWAYS_SOFTWARE") == NULL); /* ** Initialize the direct rendering per display data and functions. ** Note: This _must_ be done before calling any other DRI routines ** (e.g., those called in AllocAndFetchScreenConfigs). */ if (glx_direct && glx_accel) { dpyPriv->dri2Display = dri2CreateDisplay(dpy); dpyPriv->driDisplay = driCreateDisplay(dpy); } if (glx_direct) dpyPriv->driswDisplay = driswCreateDisplay(dpy); #endif if (!AllocAndFetchScreenConfigs(dpy, dpyPriv)) { __glXUnlock(); Xfree((char *) dpyPriv); Xfree((char *) private); return 0; } /* ** Fill in the private structure. This is the actual structure that ** hangs off of the Display structure. Our private structure is ** referred to by this structure. Got that? */ private->number = info->codes->extension; private->next = 0; private->free_private = __glXFreeDisplayPrivate; private->private_data = (char *) dpyPriv; XAddToExtensionList(privList, private); if (dpyPriv->majorVersion == 1 && dpyPriv->minorVersion >= 1) { __glXClientInfo(dpy, dpyPriv->majorOpcode); } __glXUnlock(); return dpyPriv; } /* ** Setup for sending a GLX command on dpy. Make sure the extension is ** initialized. Try to avoid calling __glXInitialize as its kinda slow. */ _X_HIDDEN CARD8 __glXSetupForCommand(Display * dpy) { GLXContext gc; __GLXdisplayPrivate *priv; /* If this thread has a current context, flush its rendering commands */ gc = __glXGetCurrentContext(); if (gc->currentDpy) { /* Flush rendering buffer of the current context, if any */ (void) __glXFlushRenderBuffer(gc, gc->pc); if (gc->currentDpy == dpy) { /* Use opcode from gc because its right */ return gc->majorOpcode; } else { /* ** Have to get info about argument dpy because it might be to ** a different server */ } } /* Forced to lookup extension via the slow initialize route */ priv = __glXInitialize(dpy); if (!priv) { return 0; } return priv->majorOpcode; } /** * Flush the drawing command transport buffer. * * \param ctx Context whose transport buffer is to be flushed. * \param pc Pointer to first unused buffer location. * * \todo * Modify this function to use \c ctx->pc instead of the explicit * \c pc parameter. */ _X_HIDDEN GLubyte * __glXFlushRenderBuffer(__GLXcontext * ctx, GLubyte * pc) { Display *const dpy = ctx->currentDpy; #ifdef USE_XCB xcb_connection_t *c = XGetXCBConnection(dpy); #else xGLXRenderReq *req; #endif /* USE_XCB */ const GLint size = pc - ctx->buf; if ((dpy != NULL) && (size > 0)) { #ifdef USE_XCB xcb_glx_render(c, ctx->currentContextTag, size, (const uint8_t *) ctx->buf); #else /* Send the entire buffer as an X request */ LockDisplay(dpy); GetReq(GLXRender, req); req->reqType = ctx->majorOpcode; req->glxCode = X_GLXRender; req->contextTag = ctx->currentContextTag; req->length += (size + 3) >> 2; _XSend(dpy, (char *) ctx->buf, size); UnlockDisplay(dpy); SyncHandle(); #endif } /* Reset pointer and return it */ ctx->pc = ctx->buf; return ctx->pc; } /** * Send a portion of a GLXRenderLarge command to the server. The advantage of * this function over \c __glXSendLargeCommand is that callers can use the * data buffer in the GLX context and may be able to avoid allocating an * extra buffer. The disadvantage is the clients will have to do more * GLX protocol work (i.e., calculating \c totalRequests, etc.). * * \sa __glXSendLargeCommand * * \param gc GLX context * \param requestNumber Which part of the whole command is this? The first * request is 1. * \param totalRequests How many requests will there be? * \param data Command data. * \param dataLen Size, in bytes, of the command data. */ _X_HIDDEN void __glXSendLargeChunk(__GLXcontext * gc, GLint requestNumber, GLint totalRequests, const GLvoid * data, GLint dataLen) { Display *dpy = gc->currentDpy; #ifdef USE_XCB xcb_connection_t *c = XGetXCBConnection(dpy); xcb_glx_render_large(c, gc->currentContextTag, requestNumber, totalRequests, dataLen, data); #else xGLXRenderLargeReq *req; if (requestNumber == 1) { LockDisplay(dpy); } GetReq(GLXRenderLarge, req); req->reqType = gc->majorOpcode; req->glxCode = X_GLXRenderLarge; req->contextTag = gc->currentContextTag; req->length += (dataLen + 3) >> 2; req->requestNumber = requestNumber; req->requestTotal = totalRequests; req->dataBytes = dataLen; Data(dpy, data, dataLen); if (requestNumber == totalRequests) { UnlockDisplay(dpy); SyncHandle(); } #endif /* USE_XCB */ } /** * Send a command that is too large for the GLXRender protocol request. * * Send a large command, one that is too large for some reason to * send using the GLXRender protocol request. One reason to send * a large command is to avoid copying the data. * * \param ctx GLX context * \param header Header data. * \param headerLen Size, in bytes, of the header data. It is assumed that * the header data will always be small enough to fit in * a single X protocol packet. * \param data Command data. * \param dataLen Size, in bytes, of the command data. */ _X_HIDDEN void __glXSendLargeCommand(__GLXcontext * ctx, const GLvoid * header, GLint headerLen, const GLvoid * data, GLint dataLen) { GLint maxSize; GLint totalRequests, requestNumber; /* ** Calculate the maximum amount of data can be stuffed into a single ** packet. sz_xGLXRenderReq is added because bufSize is the maximum ** packet size minus sz_xGLXRenderReq. */ maxSize = (ctx->bufSize + sz_xGLXRenderReq) - sz_xGLXRenderLargeReq; totalRequests = 1 + (dataLen / maxSize); if (dataLen % maxSize) totalRequests++; /* ** Send all of the command, except the large array, as one request. */ assert(headerLen <= maxSize); __glXSendLargeChunk(ctx, 1, totalRequests, header, headerLen); /* ** Send enough requests until the whole array is sent. */ for (requestNumber = 2; requestNumber <= (totalRequests - 1); requestNumber++) { __glXSendLargeChunk(ctx, requestNumber, totalRequests, data, maxSize); data = (const GLvoid *) (((const GLubyte *) data) + maxSize); dataLen -= maxSize; assert(dataLen > 0); } assert(dataLen <= maxSize); __glXSendLargeChunk(ctx, requestNumber, totalRequests, data, dataLen); } /************************************************************************/ #ifdef DEBUG _X_HIDDEN void __glXDumpDrawBuffer(__GLXcontext * ctx) { GLubyte *p = ctx->buf; GLubyte *end = ctx->pc; GLushort opcode, length; while (p < end) { /* Fetch opcode */ opcode = *((GLushort *) p); length = *((GLushort *) (p + 2)); printf("%2x: %5d: ", opcode, length); length -= 4; p += 4; while (length > 0) { printf("%08x ", *((unsigned *) p)); p += 4; length -= 4; } printf("\n"); } } #endif