/* $XFree86: xc/lib/GL/glx/glxext.c,v 1.22 2003/12/08 17:35:28 dawes Exp $ */ /* ** License Applicability. Except to the extent portions of this file are ** made subject to an alternative license as permitted in the SGI Free ** Software License B, Version 1.1 (the "License"), the contents of this ** file are subject only to the provisions of the License. You may not use ** this file except in compliance with the License. You may obtain a copy ** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600 ** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at: ** ** http://oss.sgi.com/projects/FreeB ** ** Note that, as provided in the License, the Software is distributed on an ** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS ** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND ** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A ** PARTICULAR PURPOSE, AND NON-INFRINGEMENT. ** ** Original Code. The Original Code is: OpenGL Sample Implementation, ** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics, ** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc. ** Copyright in any portions created by third parties is as indicated ** elsewhere herein. All Rights Reserved. ** ** Additional Notice Provisions: The application programming interfaces ** established by SGI in conjunction with the Original Code are The ** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released ** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version ** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X ** Window System(R) (Version 1.3), released October 19, 1998. This software ** was created using the OpenGL(R) version 1.2.1 Sample Implementation ** published by SGI, but has not been independently verified as being ** compliant with the OpenGL(R) version 1.2.1 Specification. ** */ /** * \file glxext.c * GLX protocol interface boot-strap code. * * Direct rendering support added by Precision Insight, Inc. * * \author Kevin E. Martin */ #include "glxclient.h" #include #include #include #include #include #include #include "indirect_init.h" #include "glapi.h" #include "glxextensions.h" #include "glcontextmodes.h" #include "glheader.h" #ifdef GLX_DIRECT_RENDERING #include #include #include "xf86dri.h" #include "sarea.h" #include "dri_glx.h" #endif #ifdef USE_XCB #include #include #include #endif #include #ifdef DEBUG void __glXDumpDrawBuffer(__GLXcontext *ctx); #endif #ifdef USE_SPARC_ASM /* * This is where our dispatch table's bounds are. * And the static mesa_init is taken directly from * Mesa's 'sparc.c' initializer. * * We need something like this here, because this version * of openGL/glx never initializes a Mesa context, and so * the address of the dispatch table pointer never gets stuffed * into the dispatch jump table otherwise. * * It matters only on SPARC, and only if you are using assembler * code instead of C-code indirect dispatch. * * -- FEM, 04.xii.03 */ extern unsigned int _mesa_sparc_glapi_begin; extern unsigned int _mesa_sparc_glapi_end; extern void __glapi_sparc_icache_flush(unsigned int *); static void _glx_mesa_init_sparc_glapi_relocs(void); static int _mesa_sparc_needs_init = 1; #define INIT_MESA_SPARC { \ if(_mesa_sparc_needs_init) { \ _glx_mesa_init_sparc_glapi_relocs(); \ _mesa_sparc_needs_init = 0; \ } \ } #else #define INIT_MESA_SPARC #endif #ifdef GLX_DIRECT_RENDERING static __DRIscreen *__glXFindDRIScreen(__DRInativeDisplay *dpy, int scrn); #endif /* GLX_DIRECT_RENDERING */ static Bool MakeContextCurrent(Display *dpy, GLXDrawable draw, GLXDrawable read, GLXContext gc); /* ** We setup some dummy structures here so that the API can be used ** even if no context is current. */ static GLubyte dummyBuffer[__GLX_BUFFER_LIMIT_SIZE]; /* ** Dummy context used by small commands when there is no current context. ** All the ** gl and glx entry points are designed to operate as nop's when using ** the dummy context structure. */ static __GLXcontext dummyContext = { &dummyBuffer[0], &dummyBuffer[0], &dummyBuffer[0], &dummyBuffer[__GLX_BUFFER_LIMIT_SIZE], sizeof(dummyBuffer), }; /* ** All indirect rendering contexts will share the same indirect dispatch table. */ static __GLapi *IndirectAPI = NULL; /* * Current context management and locking */ #if defined( USE_XTHREADS ) /* thread safe */ static GLboolean TSDinitialized = GL_FALSE; static xthread_key_t ContextTSD; __GLXcontext *__glXGetCurrentContext(void) { if (!TSDinitialized) { xthread_key_create(&ContextTSD, NULL); TSDinitialized = GL_TRUE; return &dummyContext; } else { void *p; xthread_get_specific(ContextTSD, &p); if (!p) return &dummyContext; else return (__GLXcontext *) p; } } void __glXSetCurrentContext(__GLXcontext *c) { if (!TSDinitialized) { xthread_key_create(&ContextTSD, NULL); TSDinitialized = GL_TRUE; } xthread_set_specific(ContextTSD, c); } /* Used by the __glXLock() and __glXUnlock() macros */ xmutex_rec __glXmutex; #elif defined( PTHREADS ) pthread_mutex_t __glXmutex = PTHREAD_MUTEX_INITIALIZER; # if defined( GLX_USE_TLS ) /** * Per-thread GLX context pointer. * * \c __glXSetCurrentContext is written is such a way that this pointer can * \b never be \c NULL. This is important! Because of this * \c __glXGetCurrentContext can be implemented as trivial macro. */ __thread void * __glX_tls_Context __attribute__((tls_model("initial-exec"))) = &dummyContext; void __glXSetCurrentContext( __GLXcontext * c ) { __glX_tls_Context = (c != NULL) ? c : &dummyContext; } # else static pthread_once_t once_control = PTHREAD_ONCE_INIT; /** * Per-thread data key. * * Once \c init_thread_data has been called, the per-thread data key will * take a value of \c NULL. As each new thread is created the default * value, in that thread, will be \c NULL. */ static pthread_key_t ContextTSD; /** * Initialize the per-thread data key. * * This function is called \b exactly once per-process (not per-thread!) to * initialize the per-thread data key. This is ideally done using the * \c pthread_once mechanism. */ static void init_thread_data( void ) { if ( pthread_key_create( & ContextTSD, NULL ) != 0 ) { perror( "pthread_key_create" ); exit( -1 ); } } void __glXSetCurrentContext( __GLXcontext * c ) { pthread_once( & once_control, init_thread_data ); pthread_setspecific( ContextTSD, c ); } __GLXcontext * __glXGetCurrentContext( void ) { void * v; pthread_once( & once_control, init_thread_data ); v = pthread_getspecific( ContextTSD ); return (v == NULL) ? & dummyContext : (__GLXcontext *) v; } # endif /* defined( GLX_USE_TLS ) */ #elif defined( THREADS ) #error Unknown threading method specified. #else /* not thread safe */ __GLXcontext *__glXcurrentContext = &dummyContext; #endif /* ** You can set this cell to 1 to force the gl drawing stuff to be ** one command per packet */ int __glXDebug = 0; /* ** forward prototype declarations */ int __glXCloseDisplay(Display *dpy, XExtCodes *codes); /************************************************************************/ /* 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", }; int __glXCloseDisplay(Display *dpy, XExtCodes *codes) { GLXContext gc; gc = __glXGetCurrentContext(); if (dpy == gc->currentDpy) { __glXSetCurrentContext(&dummyContext); #ifdef GLX_DIRECT_RENDERING _glapi_set_dispatch(NULL); /* no-op functions */ #endif __glXFreeContext(gc); } return XextRemoveDisplay(__glXExtensionInfo, dpy); } static XEXT_GENERATE_ERROR_STRING(__glXErrorString, __glXExtensionName, __GLX_NUMBER_ERRORS, error_list) 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 */ NULL, /* wire_to_event */ NULL, /* event_to_wire */ NULL, /* error */ __glXErrorString, /* error_string */ }; static XEXT_GENERATE_FIND_DISPLAY(__glXFindDisplay, __glXExtensionInfo, __glXExtensionName, &__glXExtensionHooks, __GLX_NUMBER_EVENTS, NULL) /************************************************************************/ /* ** 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 */ } Xfree((char*) psc->serverGLXexts); #ifdef GLX_DIRECT_RENDERING /* Free the direct rendering per screen data */ if (psc->driScreen.private) (*psc->driScreen.destroyScreen)(priv->dpy, i, psc->driScreen.private); psc->driScreen.private = NULL; #endif } XFree((char*) priv->screenConfigs); } /* ** 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->driDisplay.private) (*priv->driDisplay.destroyDisplay)(priv->dpy, priv->driDisplay.private); priv->driDisplay.private = 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) { 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; } 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); } #ifdef GLX_DIRECT_RENDERING static unsigned filter_modes( __GLcontextModes ** server_modes, const __GLcontextModes * driver_modes ) { __GLcontextModes * m; __GLcontextModes ** prev_next; const __GLcontextModes * check; unsigned modes_count = 0; if ( driver_modes == NULL ) { fprintf(stderr, "libGL warning: 3D driver returned no fbconfigs.\n"); return 0; } /* For each mode in server_modes, check to see if a matching mode exists * in driver_modes. If not, then the mode is not available. */ prev_next = server_modes; for ( m = *prev_next ; m != NULL ; m = *prev_next ) { GLboolean do_delete = GL_TRUE; for ( check = driver_modes ; check != NULL ; check = check->next ) { if ( _gl_context_modes_are_same( m, check ) ) { do_delete = GL_FALSE; break; } } /* The 3D has to support all the modes that match the GLX visuals * sent from the X server. */ if ( do_delete && (m->visualID != 0) ) { do_delete = GL_FALSE; fprintf(stderr, "libGL warning: 3D driver claims to not support " "visual 0x%02x\n", m->visualID); } if ( do_delete ) { *prev_next = m->next; m->next = NULL; _gl_context_modes_destroy( m ); } else { modes_count++; prev_next = & m->next; } } return modes_count; } /** * Implement \c __DRIinterfaceMethods::getProcAddress. */ static __DRIfuncPtr get_proc_address( const char * proc_name ) { if (strcmp( proc_name, "glxEnableExtension" ) == 0) { return (__DRIfuncPtr) __glXScrEnableExtension; } return NULL; } #ifdef XDAMAGE_1_1_INTERFACE static GLboolean has_damage_post(__DRInativeDisplay *dpy) { static GLboolean inited = GL_FALSE; static GLboolean has_damage; if (!inited) { int major, minor; if (XDamageQueryVersion(dpy, &major, &minor) && major == 1 && minor >= 1) { has_damage = GL_TRUE; } else { has_damage = GL_FALSE; } inited = GL_TRUE; } return has_damage; } #endif /* XDAMAGE_1_1_INTERFACE */ static void __glXReportDamage(__DRInativeDisplay *dpy, int screen, __DRIid drawable, int x, int y, drm_clip_rect_t *rects, int num_rects, GLboolean front_buffer) { #ifdef XDAMAGE_1_1_INTERFACE XRectangle *xrects; XserverRegion region; int i; int x_off, y_off; if (!has_damage_post(dpy)) return; if (front_buffer) { x_off = x; y_off = y; drawable = RootWindow(dpy, screen); } else{ x_off = 0; y_off = 0; } xrects = malloc(sizeof(XRectangle) * num_rects); if (xrects == NULL) return; for (i = 0; i < num_rects; i++) { xrects[i].x = rects[i].x1 + x_off; xrects[i].y = rects[i].y1 + y_off; xrects[i].width = rects[i].x2 - rects[i].x1; xrects[i].height = rects[i].y2 - rects[i].y1; } region = XFixesCreateRegion(dpy, xrects, num_rects); XDamagePost(dpy, drawable, region); XFixesDestroyRegion(dpy, region); #endif } /** * Table of functions exported by the loader to the driver. */ static const __DRIinterfaceMethods interface_methods = { get_proc_address, _gl_context_modes_create, _gl_context_modes_destroy, __glXFindDRIScreen, __glXWindowExists, XF86DRICreateContextWithConfig, XF86DRIDestroyContext, XF86DRICreateDrawable, XF86DRIDestroyDrawable, XF86DRIGetDrawableInfo, __glXGetUST, __glXGetMscRateOML, __glXReportDamage, }; /** * Perform the required libGL-side initialization and call the client-side * driver's \c __driCreateNewScreen function. * * \param dpy Display pointer. * \param scrn Screen number on the display. * \param psc DRI screen information. * \param driDpy DRI display information. * \param createNewScreen Pointer to the client-side driver's * \c __driCreateNewScreen function. * \returns A pointer to the \c __DRIscreenPrivate structure returned by * the client-side driver on success, or \c NULL on failure. * * \todo This function needs to be modified to remove context-modes from the * list stored in the \c __GLXscreenConfigsRec to match the list * returned by the client-side driver. */ static void * CallCreateNewScreen(Display *dpy, int scrn, __DRIscreen *psc, __DRIdisplay * driDpy, PFNCREATENEWSCREENFUNC createNewScreen) { __DRIscreenPrivate *psp = NULL; #ifndef GLX_USE_APPLEGL drm_handle_t hSAREA; drmAddress pSAREA = MAP_FAILED; char *BusID; __DRIversion ddx_version; __DRIversion dri_version; __DRIversion drm_version; __DRIframebuffer framebuffer; int fd = -1; int status; const char * err_msg; const char * err_extra; int api_ver = __glXGetInternalVersion(); dri_version.major = driDpy->private->driMajor; dri_version.minor = driDpy->private->driMinor; dri_version.patch = driDpy->private->driPatch; err_msg = "XF86DRIOpenConnection"; err_extra = NULL; framebuffer.base = MAP_FAILED; framebuffer.dev_priv = NULL; if (XF86DRIOpenConnection(dpy, scrn, &hSAREA, &BusID)) { int newlyopened; fd = drmOpenOnce(NULL,BusID, &newlyopened); Xfree(BusID); /* No longer needed */ err_msg = "open DRM"; err_extra = strerror( -fd ); if (fd >= 0) { drm_magic_t magic; err_msg = "drmGetMagic"; err_extra = NULL; if (!drmGetMagic(fd, &magic)) { drmVersionPtr version = drmGetVersion(fd); if (version) { drm_version.major = version->version_major; drm_version.minor = version->version_minor; drm_version.patch = version->version_patchlevel; drmFreeVersion(version); } else { drm_version.major = -1; drm_version.minor = -1; drm_version.patch = -1; } err_msg = "XF86DRIAuthConnection"; if (!newlyopened || XF86DRIAuthConnection(dpy, scrn, magic)) { char *driverName; /* * Get device name (like "tdfx") and the ddx version * numbers. We'll check the version in each DRI driver's * "createNewScreen" function. */ err_msg = "XF86DRIGetClientDriverName"; if (XF86DRIGetClientDriverName(dpy, scrn, &ddx_version.major, &ddx_version.minor, &ddx_version.patch, &driverName)) { drm_handle_t hFB; int junk; /* No longer needed. */ Xfree( driverName ); /* * Get device-specific info. pDevPriv will point to a struct * (such as DRIRADEONRec in xfree86/driver/ati/radeon_dri.h) * that has information about the screen size, depth, pitch, * ancilliary buffers, DRM mmap handles, etc. */ err_msg = "XF86DRIGetDeviceInfo"; if (XF86DRIGetDeviceInfo(dpy, scrn, &hFB, &junk, &framebuffer.size, &framebuffer.stride, &framebuffer.dev_priv_size, &framebuffer.dev_priv)) { framebuffer.width = DisplayWidth(dpy, scrn); framebuffer.height = DisplayHeight(dpy, scrn); /* * Map the framebuffer region. */ status = drmMap(fd, hFB, framebuffer.size, (drmAddressPtr)&framebuffer.base); err_msg = "drmMap of framebuffer"; err_extra = strerror( -status ); if ( status == 0 ) { /* * Map the SAREA region. Further mmap regions * may be setup in each DRI driver's * "createNewScreen" function. */ status = drmMap(fd, hSAREA, SAREA_MAX, &pSAREA); err_msg = "drmMap of sarea"; err_extra = strerror( -status ); if ( status == 0 ) { __GLcontextModes * driver_modes = NULL; __GLXscreenConfigs *configs = psc->screenConfigs; err_msg = "InitDriver"; err_extra = NULL; psp = (*createNewScreen)(dpy, scrn, psc, configs->configs, & ddx_version, & dri_version, & drm_version, & framebuffer, pSAREA, fd, api_ver, & interface_methods, & driver_modes ); filter_modes( & configs->configs, driver_modes ); _gl_context_modes_destroy( driver_modes ); } } } } } } } } if ( psp == NULL ) { if ( pSAREA != MAP_FAILED ) { (void)drmUnmap(pSAREA, SAREA_MAX); } if ( framebuffer.base != MAP_FAILED ) { (void)drmUnmap((drmAddress)framebuffer.base, framebuffer.size); } if ( framebuffer.dev_priv != NULL ) { Xfree(framebuffer.dev_priv); } if ( fd >= 0 ) { (void)drmCloseOnce(fd); } (void)XF86DRICloseConnection(dpy, scrn); if ( err_extra != NULL ) { fprintf(stderr, "libGL error: %s failed (%s)\n", err_msg, err_extra); } else { fprintf(stderr, "libGL error: %s failed\n", err_msg ); } fprintf(stderr, "libGL error: reverting to (slow) indirect rendering\n"); } #endif /* !GLX_USE_APPLEGL */ return psp; } #endif /* GLX_DIRECT_RENDERING */ /* ** 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) { xGLXGetVisualConfigsReq *req; xGLXGetFBConfigsReq *fb_req; xGLXVendorPrivateWithReplyReq *vpreq; xGLXGetFBConfigsSGIXReq *sgi_req; xGLXGetVisualConfigsReply reply; __GLXscreenConfigs *psc; __GLcontextModes *config; GLint i, j, nprops, screens; INT32 buf[__GLX_TOTAL_CONFIG], *props; unsigned supported_request = 0; unsigned prop_size; /* ** 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 = __glXGetStringFromServer(dpy, priv->majorOpcode, X_GLXQueryServerString, 0, GLX_VERSION); if ( priv->serverGLXversion == NULL ) { FreeScreenConfigs(priv); return GL_FALSE; } if ( atof( priv->serverGLXversion ) >= 1.3 ) { supported_request = 1; } /* ** Now fetch each screens configs structures. If a screen supports ** GL (by returning a numVisuals > 0) then allocate memory for our ** config structure and then fill it in. */ for (i = 0; i < screens; i++, psc++) { if ( supported_request != 1 ) { psc->serverGLXexts = __glXGetStringFromServer(dpy, priv->majorOpcode, X_GLXQueryServerString, i, GLX_EXTENSIONS); if ( strstr( psc->serverGLXexts, "GLX_SGIX_fbconfig" ) != NULL ) { supported_request = 2; } else { supported_request = 3; } } LockDisplay(dpy); switch( supported_request ) { case 1: GetReq(GLXGetFBConfigs,fb_req); fb_req->reqType = priv->majorOpcode; fb_req->glxCode = X_GLXGetFBConfigs; fb_req->screen = i; break; case 2: 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 = i; break; case 3: GetReq(GLXGetVisualConfigs,req); req->reqType = priv->majorOpcode; req->glxCode = X_GLXGetVisualConfigs; req->screen = i; break; } if (!_XReply(dpy, (xReply*) &reply, 0, False)) { /* Something is busted. Punt. */ UnlockDisplay(dpy); SyncHandle(); FreeScreenConfigs(priv); return GL_FALSE; } if (!reply.numVisuals) { /* This screen does not support GL rendering */ UnlockDisplay(dpy); continue; } /* FIXME: Is the __GLX_MIN_CONFIG_PROPS test correct for * FIXME: FBconfigs? */ /* Check number of properties */ nprops = reply.numProps; if ((nprops < __GLX_MIN_CONFIG_PROPS) || (nprops > __GLX_MAX_CONFIG_PROPS)) { /* Huh? Not in protocol defined limits. Punt */ UnlockDisplay(dpy); SyncHandle(); FreeScreenConfigs(priv); return GL_FALSE; } /* Allocate memory for our config structure */ psc->configs = _gl_context_modes_create(reply.numVisuals, sizeof(__GLcontextModes)); if (!psc->configs) { UnlockDisplay(dpy); SyncHandle(); FreeScreenConfigs(priv); return GL_FALSE; } /* Allocate memory for the properties, if needed */ if ( supported_request != 3 ) { nprops *= 2; } prop_size = nprops * __GLX_SIZE_INT32; if (prop_size <= sizeof(buf)) { props = buf; } else { props = (INT32 *) Xmalloc(prop_size); } /* Read each config structure and convert it into our format */ config = psc->configs; for (j = 0; j < reply.numVisuals; j++) { assert( config != NULL ); _XRead(dpy, (char *)props, prop_size); if ( supported_request != 3 ) { config->rgbMode = GL_TRUE; config->drawableType = GLX_WINDOW_BIT; } else { config->drawableType = GLX_WINDOW_BIT | GLX_PIXMAP_BIT; } __glXInitializeVisualConfigFromTags( config, nprops, props, (supported_request != 3), GL_TRUE ); if ( config->fbconfigID == GLX_DONT_CARE ) { config->fbconfigID = config->visualID; } config->screen = i; config = config->next; } if (props != buf) { Xfree((char *)props); } UnlockDisplay(dpy); #ifdef GLX_DIRECT_RENDERING /* Initialize per screen dynamic client GLX extensions */ psc->ext_list_first_time = GL_TRUE; /* Initialize the direct rendering per screen data and functions */ if (priv->driDisplay.private != NULL) { /* FIXME: Should it be some sort of an error if createNewScreen[i] * FIXME: is NULL? */ if (priv->driDisplay.createNewScreen && priv->driDisplay.createNewScreen[i]) { psc->driScreen.screenConfigs = (void *)psc; psc->driScreen.private = CallCreateNewScreen(dpy, i, & psc->driScreen, & priv->driDisplay, priv->driDisplay.createNewScreen[i] ); } } #endif } SyncHandle(); return GL_TRUE; } /* ** Initialize the client side extension code. */ __GLXdisplayPrivate *__glXInitialize(Display* dpy) { XExtDisplayInfo *info = __glXFindDisplay(dpy); XExtData **privList, *private, *found; __GLXdisplayPrivate *dpyPriv; XEDataObject dataObj; int major, minor; #if defined(USE_XTHREADS) { static int firstCall = 1; if (firstCall) { /* initialize the GLX mutexes */ xmutex_init(&__glXmutex); firstCall = 0; } } #endif INIT_MESA_SPARC /* 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 *) Xmalloc(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 /* ** 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 (getenv("LIBGL_ALWAYS_INDIRECT")) { /* Assinging zero here assures we'll never go direct */ dpyPriv->driDisplay.private = 0; dpyPriv->driDisplay.destroyDisplay = 0; } else { dpyPriv->driDisplay.private = driCreateDisplay(dpy, &dpyPriv->driDisplay); } #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. */ 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 */ INIT_MESA_SPARC 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. */ 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, (char *)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. */ 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. */ 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); } /************************************************************************/ GLXContext glXGetCurrentContext(void) { GLXContext cx = __glXGetCurrentContext(); if (cx == &dummyContext) { return NULL; } else { return cx; } } GLXDrawable glXGetCurrentDrawable(void) { GLXContext gc = __glXGetCurrentContext(); return gc->currentDrawable; } /************************************************************************/ #ifdef GLX_DIRECT_RENDERING /* Return the DRI per screen structure */ __DRIscreen *__glXFindDRIScreen(__DRInativeDisplay *dpy, int scrn) { __DRIscreen *pDRIScreen = NULL; XExtDisplayInfo *info = __glXFindDisplay(dpy); XExtData **privList, *found; __GLXdisplayPrivate *dpyPriv; XEDataObject dataObj; __glXLock(); dataObj.display = dpy; privList = XEHeadOfExtensionList(dataObj); found = XFindOnExtensionList(privList, info->codes->extension); __glXUnlock(); if (found) { dpyPriv = (__GLXdisplayPrivate *)found->private_data; pDRIScreen = &dpyPriv->screenConfigs[scrn].driScreen; } return pDRIScreen; } #endif /************************************************************************/ static Bool SendMakeCurrentRequest( Display *dpy, CARD8 opcode, GLXContextID gc, GLXContextTag old_gc, GLXDrawable draw, GLXDrawable read, xGLXMakeCurrentReply * reply ); /** * Sends a GLX protocol message to the specified display to make the context * and the drawables current. * * \param dpy Display to send the message to. * \param opcode Major opcode value for the display. * \param gc_id Context tag for the context to be made current. * \param draw Drawable ID for the "draw" drawable. * \param read Drawable ID for the "read" drawable. * \param reply Space to store the X-server's reply. * * \warning * This function assumes that \c dpy is locked with \c LockDisplay on entry. */ static Bool SendMakeCurrentRequest(Display *dpy, CARD8 opcode, GLXContextID gc_id, GLXContextTag gc_tag, GLXDrawable draw, GLXDrawable read, xGLXMakeCurrentReply *reply) { Bool ret; LockDisplay(dpy); if (draw == read) { xGLXMakeCurrentReq *req; GetReq(GLXMakeCurrent,req); req->reqType = opcode; req->glxCode = X_GLXMakeCurrent; req->drawable = draw; req->context = gc_id; req->oldContextTag = gc_tag; } else { __GLXdisplayPrivate *priv = __glXInitialize(dpy); /* If the server can support the GLX 1.3 version, we should * perfer that. Not only that, some servers support GLX 1.3 but * not the SGI extension. */ if ((priv->majorVersion > 1) || (priv->minorVersion >= 3)) { xGLXMakeContextCurrentReq *req; GetReq(GLXMakeContextCurrent,req); req->reqType = opcode; req->glxCode = X_GLXMakeContextCurrent; req->drawable = draw; req->readdrawable = read; req->context = gc_id; req->oldContextTag = gc_tag; } else { xGLXVendorPrivateWithReplyReq *vpreq; xGLXMakeCurrentReadSGIReq *req; GetReqExtra(GLXVendorPrivateWithReply, sz_xGLXMakeCurrentReadSGIReq-sz_xGLXVendorPrivateWithReplyReq,vpreq); req = (xGLXMakeCurrentReadSGIReq *)vpreq; req->reqType = opcode; req->glxCode = X_GLXVendorPrivateWithReply; req->vendorCode = X_GLXvop_MakeCurrentReadSGI; req->drawable = draw; req->readable = read; req->context = gc_id; req->oldContextTag = gc_tag; } } ret = _XReply(dpy, (xReply*) reply, 0, False); UnlockDisplay(dpy); SyncHandle(); return ret; } #ifdef GLX_DIRECT_RENDERING static Bool BindContextWrapper( Display *dpy, GLXContext gc, GLXDrawable draw, GLXDrawable read ) { return (*gc->driContext.bindContext)(dpy, gc->screen, draw, read, & gc->driContext); } static Bool UnbindContextWrapper( GLXContext gc ) { return (*gc->driContext.unbindContext)(gc->currentDpy, gc->screen, gc->currentDrawable, gc->currentReadable, & gc->driContext ); } #endif /* GLX_DIRECT_RENDERING */ /** * Make a particular context current. * * \note This is in this file so that it can access dummyContext. */ USED static Bool MakeContextCurrent(Display *dpy, GLXDrawable draw, GLXDrawable read, GLXContext gc) { xGLXMakeCurrentReply reply; const GLXContext oldGC = __glXGetCurrentContext(); const CARD8 opcode = __glXSetupForCommand(dpy); const CARD8 oldOpcode = ((gc == oldGC) || (oldGC == &dummyContext)) ? opcode : __glXSetupForCommand(oldGC->currentDpy); Bool bindReturnValue; if (!opcode || !oldOpcode) { return GL_FALSE; } /* Make sure that the new context has a nonzero ID. In the request, * a zero context ID is used only to mean that we bind to no current * context. */ if ((gc != NULL) && (gc->xid == None)) { return GL_FALSE; } #ifndef GLX_DIRECT_RENDERING if (gc && gc->isDirect) { return GL_FALSE; } #endif _glapi_check_multithread(); #ifdef GLX_DIRECT_RENDERING /* Bind the direct rendering context to the drawable */ if (gc && gc->isDirect) { bindReturnValue = (gc->driContext.private) ? BindContextWrapper(dpy, gc, draw, read) : False; } else #endif { /* Send a glXMakeCurrent request to bind the new context. */ bindReturnValue = SendMakeCurrentRequest(dpy, opcode, gc ? gc->xid : None, ((dpy != oldGC->currentDpy) || oldGC->isDirect) ? None : oldGC->currentContextTag, draw, read, &reply); } if (!bindReturnValue) { return False; } if ((dpy != oldGC->currentDpy || (gc && gc->isDirect)) && !oldGC->isDirect && oldGC != &dummyContext) { xGLXMakeCurrentReply dummy_reply; /* We are either switching from one dpy to another and have to * send a request to the previous dpy to unbind the previous * context, or we are switching away from a indirect context to * a direct context and have to send a request to the dpy to * unbind the previous context. */ (void) SendMakeCurrentRequest(oldGC->currentDpy, oldOpcode, None, oldGC->currentContextTag, None, None, & dummy_reply); } #ifdef GLX_DIRECT_RENDERING else if (oldGC->isDirect && oldGC->driContext.private) { (void) UnbindContextWrapper(oldGC); } #endif /* Update our notion of what is current */ __glXLock(); if (gc == oldGC) { /* Even though the contexts are the same the drawable might have * changed. Note that gc cannot be the dummy, and that oldGC * cannot be NULL, therefore if they are the same, gc is not * NULL and not the dummy. */ gc->currentDrawable = draw; gc->currentReadable = read; } else { if (oldGC != &dummyContext) { /* Old current context is no longer current to anybody */ oldGC->currentDpy = 0; oldGC->currentDrawable = None; oldGC->currentReadable = None; oldGC->currentContextTag = 0; if (oldGC->xid == None) { /* We are switching away from a context that was * previously destroyed, so we need to free the memory * for the old handle. */ #ifdef GLX_DIRECT_RENDERING /* Destroy the old direct rendering context */ if (oldGC->isDirect) { if (oldGC->driContext.private) { (*oldGC->driContext.destroyContext) (dpy, oldGC->screen, oldGC->driContext.private); oldGC->driContext.private = NULL; } } #endif __glXFreeContext(oldGC); } } if (gc) { __glXSetCurrentContext(gc); gc->currentDpy = dpy; gc->currentDrawable = draw; gc->currentReadable = read; if (!gc->isDirect) { if (!IndirectAPI) IndirectAPI = __glXNewIndirectAPI(); _glapi_set_dispatch(IndirectAPI); #ifdef GLX_USE_APPLEGL do { extern void XAppleDRIUseIndirectDispatch(void); XAppleDRIUseIndirectDispatch(); } while (0); #endif __GLXattribute *state = (__GLXattribute *)(gc->client_state_private); gc->currentContextTag = reply.contextTag; if (state->array_state == NULL) { (void) glGetString(GL_EXTENSIONS); (void) glGetString(GL_VERSION); __glXInitVertexArrayState(gc); } } else { gc->currentContextTag = -1; } } else { __glXSetCurrentContext(&dummyContext); #ifdef GLX_DIRECT_RENDERING _glapi_set_dispatch(NULL); /* no-op functions */ #endif } } __glXUnlock(); return GL_TRUE; } PUBLIC Bool glXMakeCurrent(Display *dpy, GLXDrawable draw, GLXContext gc) { return MakeContextCurrent( dpy, draw, draw, gc ); } PUBLIC GLX_ALIAS(Bool, glXMakeCurrentReadSGI, (Display *dpy, GLXDrawable d, GLXDrawable r, GLXContext ctx), (dpy, d, r, ctx), MakeContextCurrent) PUBLIC GLX_ALIAS(Bool, glXMakeContextCurrent, (Display *dpy, GLXDrawable d, GLXDrawable r, GLXContext ctx), (dpy, d, r, ctx), MakeContextCurrent) #ifdef DEBUG 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 #ifdef USE_SPARC_ASM /* * Used only when we are sparc, using sparc assembler. * */ static void _glx_mesa_init_sparc_glapi_relocs(void) { unsigned int *insn_ptr, *end_ptr; unsigned long disp_addr; insn_ptr = &_mesa_sparc_glapi_begin; end_ptr = &_mesa_sparc_glapi_end; disp_addr = (unsigned long) &_glapi_Dispatch; /* * Verbatim from Mesa sparc.c. It's needed because there doesn't * seem to be a better way to do this: * * UNCONDITIONAL_JUMP ( (*_glapi_Dispatch) + entry_offset ) * * This code is patching in the ADDRESS of the pointer to the * dispatch table. Hence, it must be called exactly once, because * that address is not going to change. * * What it points to can change, but Mesa (and hence, we) assume * that there is only one pointer. * */ while (insn_ptr < end_ptr) { #if ( defined(__sparc_v9__) && ( !defined(__linux__) || defined(__linux_64__) ) ) /* This code patches for 64-bit addresses. This had better not happen for Sparc/Linux, no matter what architecture we are building for. So, don't do this. The 'defined(__linux_64__)' is used here as a placeholder for when we do do 64-bit usermode on sparc linux. */ insn_ptr[0] |= (disp_addr >> (32 + 10)); insn_ptr[1] |= ((disp_addr & 0xffffffff) >> 10); __glapi_sparc_icache_flush(&insn_ptr[0]); insn_ptr[2] |= ((disp_addr >> 32) & ((1 << 10) - 1)); insn_ptr[3] |= (disp_addr & ((1 << 10) - 1)); __glapi_sparc_icache_flush(&insn_ptr[2]); insn_ptr += 11; #else insn_ptr[0] |= (disp_addr >> 10); insn_ptr[1] |= (disp_addr & ((1 << 10) - 1)); __glapi_sparc_icache_flush(&insn_ptr[0]); insn_ptr += 5; #endif } } #endif /* sparc ASM in use */