diff options
Diffstat (limited to 'nx-X11/extras/Mesa_6.4.2/src/glx/x11/dri_glx.c')
| -rw-r--r-- | nx-X11/extras/Mesa_6.4.2/src/glx/x11/dri_glx.c | 461 |
1 files changed, 461 insertions, 0 deletions
diff --git a/nx-X11/extras/Mesa_6.4.2/src/glx/x11/dri_glx.c b/nx-X11/extras/Mesa_6.4.2/src/glx/x11/dri_glx.c new file mode 100644 index 000000000..516ca508c --- /dev/null +++ b/nx-X11/extras/Mesa_6.4.2/src/glx/x11/dri_glx.c @@ -0,0 +1,461 @@ +/************************************************************************** + +Copyright 1998-1999 Precision Insight, Inc., Cedar Park, Texas. +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, sub license, 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 and this permission notice (including the +next paragraph) 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 NON-INFRINGEMENT. +IN NO EVENT SHALL PRECISION INSIGHT AND/OR ITS SUPPLIERS 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. + +**************************************************************************/ +/* $XFree86: xc/lib/GL/dri/dri_glx.c,v 1.14 2003/07/16 00:54:00 dawes Exp $ */ + +/* + * Authors: + * Kevin E. Martin <kevin@precisioninsight.com> + * Brian Paul <brian@precisioninsight.com> + * + */ + +#ifdef GLX_DIRECT_RENDERING + +#include <unistd.h> +#include <X11/Xlibint.h> +#include <X11/extensions/Xext.h> +#include <X11/extensions/extutil.h> +#include "glxclient.h" +#include "xf86dri.h" +#include "sarea.h" +#include <stdio.h> +#include <dlfcn.h> +#include "dri_glx.h" +#include <sys/types.h> +#include <stdarg.h> + +#ifndef RTLD_NOW +#define RTLD_NOW 0 +#endif +#ifndef RTLD_GLOBAL +#define RTLD_GLOBAL 0 +#endif + + +#ifndef DEFAULT_DRIVER_DIR +/* this is normally defined in the Imakefile */ +#define DEFAULT_DRIVER_DIR "/usr/X11R6/lib/modules/dri" +#endif + +static __DRIdriver *Drivers = NULL; + + +/* + * printf wrappers + */ + +static void InfoMessageF(const char *f, ...) +{ + va_list args; + const char *env; + + if ((env = getenv("LIBGL_DEBUG")) && strstr(env, "verbose")) { + fprintf(stderr, "libGL: "); + va_start(args, f); + vfprintf(stderr, f, args); + va_end(args); + } +} + +static void ErrorMessageF(const char *f, ...) +{ + va_list args; + + if (getenv("LIBGL_DEBUG")) { + fprintf(stderr, "libGL error: "); + va_start(args, f); + vfprintf(stderr, f, args); + va_end(args); + } +} + + +/** + * Extract the ith directory path out of a colon-separated list of paths. No + * more than \c dirLen characters, including the terminating \c NUL, will be + * written to \c dir. + * + * \param index Index of path to extract (starting at zero) + * \param paths The colon-separated list of paths + * \param dirLen Maximum length of result to store in \c dir + * \param dir Buffer to hold the extracted directory path + * + * \returns + * The number of characters that would have been written to \c dir had there + * been enough room. This does not include the terminating \c NUL. When + * extraction fails, zero will be returned. + * + * \todo + * It seems like this function could be rewritten to use \c strchr. + */ +static size_t +ExtractDir(int index, const char *paths, int dirLen, char *dir) +{ + int i, len; + const char *start, *end; + + /* find ith colon */ + start = paths; + i = 0; + while (i < index) { + if (*start == ':') { + i++; + start++; + } + else if (*start == 0) { + /* end of string and couldn't find ith colon */ + dir[0] = 0; + return 0; + } + else { + start++; + } + } + + while (*start == ':') + start++; + + /* find next colon, or end of string */ + end = start + 1; + while (*end != ':' && *end != 0) { + end++; + } + + /* copy string between <start> and <end> into result string */ + len = end - start; + if (len > dirLen - 1) + len = dirLen - 1; + strncpy(dir, start, len); + dir[len] = 0; + + return( end - start ); +} + + +/** + * Versioned name of the expected \c __driCreateNewScreen function. + * + * The version of the last incompatible loader/driver inteface change is + * appended to the name of the \c __driCreateNewScreen function. This + * prevents loaders from trying to load drivers that are too old. + * + * \todo + * Create a macro or something so that this is automatically updated. + */ +static const char createNewScreenName[] = "__driCreateNewScreen_20050727"; + + +/** + * Try to \c dlopen the named driver. + * + * This function adds the "_dri.so" suffix to the driver name and searches the + * directories specified by the \c LIBGL_DRIVERS_PATH environment variable in + * order to find the driver. + * + * \param driverName - a name like "tdfx", "i810", "mga", etc. + * + * \returns + * A handle from \c dlopen, or \c NULL if driver file not found. + */ +static __DRIdriver *OpenDriver(const char *driverName) +{ + char *libPaths = NULL; + char libDir[1000]; + int i; + __DRIdriver *driver; + + /* First, search Drivers list to see if we've already opened this driver */ + for (driver = Drivers; driver; driver = driver->next) { + if (strcmp(driver->name, driverName) == 0) { + /* found it */ + return driver; + } + } + + if (geteuid() == getuid()) { + /* don't allow setuid apps to use LIBGL_DRIVERS_PATH */ + libPaths = getenv("LIBGL_DRIVERS_PATH"); + if (!libPaths) + libPaths = getenv("LIBGL_DRIVERS_DIR"); /* deprecated */ + } + if (!libPaths) + libPaths = DEFAULT_DRIVER_DIR; + + for ( i = 0 ; ExtractDir(i, libPaths, 1000, libDir) != 0 ; i++ ) { + char realDriverName[200]; + void *handle = NULL; + + + /* If TLS support is enabled, try to open the TLS version of the driver + * binary first. If that fails, try the non-TLS version. + */ +#ifdef GLX_USE_TLS + snprintf(realDriverName, 200, "%s/tls/%s_dri.so", libDir, driverName); + InfoMessageF("OpenDriver: trying %s\n", realDriverName); + handle = dlopen(realDriverName, RTLD_NOW | RTLD_GLOBAL); +#endif + + if ( handle == NULL ) { + snprintf(realDriverName, 200, "%s/%s_dri.so", libDir, driverName); + InfoMessageF("OpenDriver: trying %s\n", realDriverName); + handle = dlopen(realDriverName, RTLD_NOW | RTLD_GLOBAL); + } + + if ( handle != NULL ) { + /* allocate __DRIdriver struct */ + driver = (__DRIdriver *) Xmalloc(sizeof(__DRIdriver)); + if (!driver) + return NULL; /* out of memory! */ + /* init the struct */ + driver->name = __glXstrdup(driverName); + if (!driver->name) { + Xfree(driver); + return NULL; /* out of memory! */ + } + + driver->createNewScreenFunc = (PFNCREATENEWSCREENFUNC) + dlsym(handle, createNewScreenName); + + if ( driver->createNewScreenFunc == NULL ) { + /* If the driver doesn't have this symbol then something's + * really, really wrong. + */ + ErrorMessageF("%s not defined in %s_dri.so!\n" + "Your driver may be too old for this libGL.\n", + createNewScreenName, driverName); + Xfree(driver); + dlclose(handle); + continue; + } + driver->handle = handle; + /* put at head of linked list */ + driver->next = Drivers; + Drivers = driver; + return driver; + } + else { + ErrorMessageF("dlopen %s failed (%s)\n", realDriverName, dlerror()); + } + } + + ErrorMessageF("unable to find driver: %s_dri.so\n", driverName); + return NULL; +} + + +/* + * Given a display pointer and screen number, determine the name of + * the DRI driver for the screen. (I.e. "r128", "tdfx", etc). + * Return True for success, False for failure. + */ +static Bool GetDriverName(Display *dpy, int scrNum, char **driverName) +{ + int directCapable; + Bool b; + int driverMajor, driverMinor, driverPatch; + + *driverName = NULL; + + if (!XF86DRIQueryDirectRenderingCapable(dpy, scrNum, &directCapable)) { + ErrorMessageF("XF86DRIQueryDirectRenderingCapable failed\n"); + return False; + } + if (!directCapable) { + ErrorMessageF("XF86DRIQueryDirectRenderingCapable returned false\n"); + return False; + } + + b = XF86DRIGetClientDriverName(dpy, scrNum, &driverMajor, &driverMinor, + &driverPatch, driverName); + if (!b) { + ErrorMessageF("Cannot determine driver name for screen %d\n", scrNum); + return False; + } + + InfoMessageF("XF86DRIGetClientDriverName: %d.%d.%d %s (screen %d)\n", + driverMajor, driverMinor, driverPatch, *driverName, scrNum); + + return True; +} + + +/* + * Given a display pointer and screen number, return a __DRIdriver handle. + * Return NULL if anything goes wrong. + */ +__DRIdriver *driGetDriver(Display *dpy, int scrNum) +{ + char *driverName; + if (GetDriverName(dpy, scrNum, &driverName)) { + __DRIdriver *ret; + ret = OpenDriver(driverName); + if (driverName) + Xfree(driverName); + return ret; + } + return NULL; +} + + +/* + * Exported function for querying the DRI driver for a given screen. + * + * The returned char pointer points to a static array that will be + * overwritten by subsequent calls. + */ +const char *glXGetScreenDriver (Display *dpy, int scrNum) { + static char ret[32]; + char *driverName; + if (GetDriverName(dpy, scrNum, &driverName)) { + int len; + if (!driverName) + return NULL; + len = strlen (driverName); + if (len >= 31) + return NULL; + memcpy (ret, driverName, len+1); + Xfree(driverName); + return ret; + } + return NULL; +} + + +/* + * Exported function for obtaining a driver's option list (UTF-8 encoded XML). + * + * The returned char pointer points directly into the driver. Therefore + * it should be treated as a constant. + * + * If the driver was not found or does not support configuration NULL is + * returned. + * + * Note: The driver remains opened after this function returns. + */ +const char *glXGetDriverConfig (const char *driverName) { + __DRIdriver *driver = OpenDriver (driverName); + if (driver) + return dlsym (driver->handle, "__driConfigOptions"); + else + return NULL; +} + + +/* This function isn't currently used. + */ +static void driDestroyDisplay(Display *dpy, void *private) +{ + __DRIdisplayPrivate *pdpyp = (__DRIdisplayPrivate *)private; + + if (pdpyp) { + const int numScreens = ScreenCount(dpy); + int i; + for (i = 0; i < numScreens; i++) { + if (pdpyp->libraryHandles[i]) + dlclose(pdpyp->libraryHandles[i]); + } + Xfree(pdpyp->libraryHandles); + Xfree(pdpyp); + } +} + + +/* + * Allocate, initialize and return a __DRIdisplayPrivate object. + * This is called from __glXInitialize() when we are given a new + * display pointer. + */ +void *driCreateDisplay(Display *dpy, __DRIdisplay *pdisp) +{ + const int numScreens = ScreenCount(dpy); + __DRIdisplayPrivate *pdpyp; + int eventBase, errorBase; + int major, minor, patch; + int scrn; + + /* Initialize these fields to NULL in case we fail. + * If we don't do this we may later get segfaults trying to free random + * addresses when the display is closed. + */ + pdisp->private = NULL; + pdisp->destroyDisplay = NULL; + + if (!XF86DRIQueryExtension(dpy, &eventBase, &errorBase)) { + return NULL; + } + + if (!XF86DRIQueryVersion(dpy, &major, &minor, &patch)) { + return NULL; + } + + pdpyp = (__DRIdisplayPrivate *)Xmalloc(sizeof(__DRIdisplayPrivate)); + if (!pdpyp) { + return NULL; + } + + pdpyp->driMajor = major; + pdpyp->driMinor = minor; + pdpyp->driPatch = patch; + + pdisp->destroyDisplay = driDestroyDisplay; + + /* allocate array of pointers to createNewScreen funcs */ + pdisp->createNewScreen = (PFNCREATENEWSCREENFUNC *) + Xmalloc(numScreens * sizeof(void *)); + if (!pdisp->createNewScreen) { + Xfree(pdpyp); + return NULL; + } + + /* allocate array of library handles */ + pdpyp->libraryHandles = (void **) Xmalloc(numScreens * sizeof(void*)); + if (!pdpyp->libraryHandles) { + Xfree(pdisp->createNewScreen); + Xfree(pdpyp); + return NULL; + } + + /* dynamically discover DRI drivers for all screens, saving each + * driver's "__driCreateScreen" function pointer. That's the bootstrap + * entrypoint for all DRI drivers. + */ + for (scrn = 0; scrn < numScreens; scrn++) { + __DRIdriver *driver = driGetDriver(dpy, scrn); + if (driver) { + pdisp->createNewScreen[scrn] = driver->createNewScreenFunc; + pdpyp->libraryHandles[scrn] = driver->handle; + } + else { + pdisp->createNewScreen[scrn] = NULL; + pdpyp->libraryHandles[scrn] = NULL; + } + } + + return (void *)pdpyp; +} + +#endif /* GLX_DIRECT_RENDERING */ |