+/**************************************************************************
+ *
+ * Copyright 2008 VMware, Inc.
+ * Copyright 2009-2010 Chia-I Wu <olvaffe@gmail.com>
+ * Copyright 2010-2011 LunarG, 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, 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 NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS 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.
+ *
+ **************************************************************************/
+
+
/**
* Functions for choosing and opening/loading device drivers.
*/
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
+#include "c11/threads.h"
-#include "eglstring.h"
-#include "eglconfig.h"
-#include "eglcontext.h"
#include "egldefines.h"
#include "egldisplay.h"
#include "egldriver.h"
#include "egllog.h"
-#include "eglmisc.h"
-#include "eglmode.h"
-#include "eglscreen.h"
-#include "eglsurface.h"
-#include "eglimage.h"
-#include "eglsync.h"
-#include "eglmutex.h"
-
-#if defined(_EGL_OS_UNIX)
-#include <dlfcn.h>
-#include <sys/types.h>
-#include <dirent.h>
-#include <unistd.h>
-#endif
-
-
-typedef struct _egl_module {
- char *Path;
- void *Handle;
- _EGLDriver *Driver;
-} _EGLModule;
-
-static _EGL_DECLARE_MUTEX(_eglModuleMutex);
-static _EGLArray *_eglModules;
-
-
-/**
- * Wrappers for dlopen/dlclose()
- */
-#if defined(_EGL_OS_WINDOWS)
-
-typedef HMODULE lib_handle;
-
-static HMODULE
-open_library(const char *filename)
-{
- return LoadLibrary(filename);
-}
-
-static void
-close_library(HMODULE lib)
-{
- FreeLibrary(lib);
-}
+#include "util/debug.h"
+static mtx_t _eglModuleMutex = _MTX_INITIALIZER_NP;
+static _EGLDriver *_eglDriver;
-static const char *
-library_suffix(void)
+static _EGLDriver *
+_eglGetDriver(void)
{
- return ".dll";
-}
-
-
-#elif defined(_EGL_OS_UNIX)
-
-
-typedef void * lib_handle;
-
-static void *
-open_library(const char *filename)
-{
- return dlopen(filename, RTLD_LAZY);
-}
-
-static void
-close_library(void *lib)
-{
- dlclose(lib);
-}
-
-
-static const char *
-library_suffix(void)
-{
- return ".so";
-}
-
-
-#endif
-
-
-/**
- * Open the named driver and find its bootstrap function: _eglMain().
- */
-static _EGLMain_t
-_eglOpenLibrary(const char *driverPath, lib_handle *handle)
-{
- lib_handle lib;
- _EGLMain_t mainFunc = NULL;
- const char *error = "unknown error";
-
- assert(driverPath);
-
- _eglLog(_EGL_DEBUG, "dlopen(%s)", driverPath);
- lib = open_library(driverPath);
-
-#if defined(_EGL_OS_WINDOWS)
- /* XXX untested */
- if (lib)
- mainFunc = (_EGLMain_t) GetProcAddress(lib, "_eglMain");
-#elif defined(_EGL_OS_UNIX)
- if (lib) {
- union {
- _EGLMain_t func;
- void *ptr;
- } tmp = { NULL };
- /* direct cast gives a warning when compiled with -pedantic */
- tmp.ptr = dlsym(lib, "_eglMain");
- mainFunc = tmp.func;
- if (!mainFunc)
- error = dlerror();
- }
- else {
- error = dlerror();
- }
-#endif
-
- if (!lib) {
- _eglLog(_EGL_WARNING, "Could not open driver %s (%s)",
- driverPath, error);
- if (!getenv("EGL_DRIVER"))
- _eglLog(_EGL_WARNING,
- "The driver can be overridden by setting EGL_DRIVER");
- return NULL;
- }
-
- if (!mainFunc) {
- _eglLog(_EGL_WARNING, "_eglMain not found in %s (%s)",
- driverPath, error);
- if (lib)
- close_library(lib);
- return NULL;
- }
-
- *handle = lib;
- return mainFunc;
-}
+ mtx_lock(&_eglModuleMutex);
-
-/**
- * Load a module and create the driver object.
- */
-static EGLBoolean
-_eglLoadModule(_EGLModule *mod)
-{
- _EGLMain_t mainFunc;
- lib_handle lib;
- _EGLDriver *drv;
-
- mainFunc = _eglOpenLibrary(mod->Path, &lib);
- if (!mainFunc)
- return EGL_FALSE;
-
- drv = mainFunc(NULL);
- if (!drv) {
- if (lib)
- close_library(lib);
- return EGL_FALSE;
- }
-
- if (!drv->Name) {
- _eglLog(_EGL_WARNING, "Driver loaded from %s has no name", mod->Path);
- drv->Name = "UNNAMED";
- }
-
- mod->Handle = (void *) lib;
- mod->Driver = drv;
-
- return EGL_TRUE;
-}
-
-
-/**
- * Unload a module.
- */
-static void
-_eglUnloadModule(_EGLModule *mod)
-{
- /* destroy the driver */
- if (mod->Driver && mod->Driver->Unload)
- mod->Driver->Unload(mod->Driver);
- if (mod->Handle)
- close_library(mod->Handle);
-
- mod->Driver = NULL;
- mod->Handle = NULL;
-}
-
-
-/**
- * Add a module to the module array.
- */
-static _EGLModule *
-_eglAddModule(const char *path)
-{
- _EGLModule *mod;
- EGLint i;
-
- if (!_eglModules) {
- _eglModules = _eglCreateArray("Module", 8);
- if (!_eglModules)
+ if (!_eglDriver) {
+ _eglDriver = calloc(1, sizeof(*_eglDriver));
+ if (!_eglDriver) {
+ mtx_unlock(&_eglModuleMutex);
return NULL;
- }
-
- /* find duplicates */
- for (i = 0; i < _eglModules->Size; i++) {
- mod = _eglModules->Elements[i];
- if (strcmp(mod->Path, path) == 0)
- return mod;
- }
-
- /* allocate a new one */
- mod = calloc(1, sizeof(*mod));
- if (mod) {
- mod->Path = _eglstrdup(path);
- if (!mod->Path) {
- free(mod);
- mod = NULL;
}
- }
- if (mod) {
- _eglAppendArray(_eglModules, (void *) mod);
- _eglLog(_EGL_DEBUG, "added %s to module array", mod->Path);
+ _eglInitDriver(_eglDriver);
}
- return mod;
-}
-
-
-/**
- * Free a module.
- */
-static void
-_eglFreeModule(void *module)
-{
- _EGLModule *mod = (_EGLModule *) module;
+ mtx_unlock(&_eglModuleMutex);
- _eglUnloadModule(mod);
- free(mod->Path);
- free(mod);
+ return _eglDriver;
}
-
-/**
- * A loader function for use with _eglPreloadForEach. The loader data is the
- * filename of the driver. This function stops on the first valid driver.
- */
-static EGLBoolean
-_eglLoaderFile(const char *dir, size_t len, void *loader_data)
+static _EGLDriver *
+_eglMatchAndInitialize(_EGLDisplay *disp)
{
- char path[1024];
- const char *filename = (const char *) loader_data;
- size_t flen = strlen(filename);
-
- /* make a full path */
- if (len + flen + 2 > sizeof(path))
- return EGL_TRUE;
- if (len) {
- memcpy(path, dir, len);
- path[len++] = '/';
- }
- memcpy(path + len, filename, flen);
- len += flen;
- path[len] = '\0';
+ if (_eglGetDriver())
+ if (_eglDriver->API.Initialize(_eglDriver, disp))
+ return _eglDriver;
- if (library_suffix()) {
- const char *suffix = library_suffix();
- size_t slen = strlen(suffix);
- const char *p;
- EGLBoolean need_suffix;
-
- p = filename + flen - slen;
- need_suffix = (p < filename || strcmp(p, suffix) != 0);
- if (need_suffix) {
- /* overflow */
- if (len + slen + 1 > sizeof(path))
- return EGL_TRUE;
- strcpy(path + len, suffix);
- }
- }
-
-#if defined(_EGL_OS_UNIX)
- /* check if the file exists */
- if (access(path, F_OK))
- return EGL_TRUE;
-#endif
-
- _eglAddModule(path);
-
- return EGL_TRUE;
+ return NULL;
}
-
/**
- * A loader function for use with _eglPreloadForEach. The loader data is the
- * pattern (prefix) of the files to look for.
- */
-static EGLBoolean
-_eglLoaderPattern(const char *dir, size_t len, void *loader_data)
-{
-#if defined(_EGL_OS_UNIX)
- const char *prefix, *suffix;
- size_t prefix_len, suffix_len;
- DIR *dirp;
- struct dirent *dirent;
- char path[1024];
-
- if (len + 2 > sizeof(path))
- return EGL_TRUE;
- if (len) {
- memcpy(path, dir, len);
- path[len++] = '/';
- }
- path[len] = '\0';
-
- dirp = opendir(path);
- if (!dirp)
- return EGL_TRUE;
-
- prefix = (const char *) loader_data;
- prefix_len = strlen(prefix);
- suffix = library_suffix();
- suffix_len = (suffix) ? strlen(suffix) : 0;
-
- while ((dirent = readdir(dirp))) {
- size_t dirent_len = strlen(dirent->d_name);
- const char *p;
-
- /* match the prefix */
- if (strncmp(dirent->d_name, prefix, prefix_len) != 0)
- continue;
- /* match the suffix */
- if (suffix) {
- p = dirent->d_name + dirent_len - suffix_len;
- if (p < dirent->d_name || strcmp(p, suffix) != 0)
- continue;
- }
-
- /* make a full path and add it to the module array */
- if (len + dirent_len + 1 <= sizeof(path)) {
- strcpy(path + len, dirent->d_name);
- _eglAddModule(path);
- }
- }
-
- closedir(dirp);
-
- return EGL_TRUE;
-#else /* _EGL_OS_UNIX */
- /* stop immediately */
- return EGL_FALSE;
-#endif
-}
-
-
-/**
- * Run the callback function on each driver directory.
- *
- * The process may end prematurely if the callback function returns false.
- */
-static void
-_eglPreloadForEach(const char *search_path,
- EGLBoolean (*loader)(const char *, size_t, void *),
- void *loader_data)
-{
- const char *cur, *next;
- size_t len;
-
- cur = search_path;
- while (cur) {
- next = strchr(cur, ':');
- len = (next) ? next - cur : strlen(cur);
-
- if (!loader(cur, len, loader_data))
- break;
-
- cur = (next) ? next + 1 : NULL;
- }
-}
-
-
-/**
- * Return a list of colon-separated driver directories.
- */
-static const char *
-_eglGetSearchPath(void)
-{
- static const char *search_path;
-
-#if defined(_EGL_OS_UNIX) || defined(_EGL_OS_WINDOWS)
- if (!search_path) {
- static char buffer[1024];
- const char *p;
- int ret;
-
- p = getenv("EGL_DRIVERS_PATH");
-#if defined(_EGL_OS_UNIX)
- if (p && (geteuid() != getuid() || getegid() != getgid())) {
- _eglLog(_EGL_DEBUG,
- "ignore EGL_DRIVERS_PATH for setuid/setgid binaries");
- p = NULL;
- }
-#endif /* _EGL_OS_UNIX */
-
- if (p) {
- ret = _eglsnprintf(buffer, sizeof(buffer),
- "%s:%s", p, _EGL_DRIVER_SEARCH_DIR);
- if (ret > 0 && ret < sizeof(buffer))
- search_path = buffer;
- }
- }
- if (!search_path)
- search_path = _EGL_DRIVER_SEARCH_DIR;
-#else
- search_path = "";
-#endif
-
- return search_path;
-}
-
-
-/**
- * Add the user driver to the module array.
- *
- * The user driver is specified by EGL_DRIVER.
- */
-static void
-_eglAddUserDriver(void)
-{
- const char *search_path = _eglGetSearchPath();
- char *env;
-
- env = getenv("EGL_DRIVER");
-#if defined(_EGL_OS_UNIX)
- if (env && strchr(env, '/')) {
- search_path = "";
- if ((geteuid() != getuid() || getegid() != getgid())) {
- _eglLog(_EGL_DEBUG,
- "ignore EGL_DRIVER for setuid/setgid binaries");
- env = NULL;
- }
- }
-#endif /* _EGL_OS_UNIX */
- if (env)
- _eglPreloadForEach(search_path, _eglLoaderFile, (void *) env);
-}
-
-
-/**
- * Add default drivers to the module array.
- */
-static void
-_eglAddDefaultDrivers(void)
-{
- const char *search_path = _eglGetSearchPath();
- EGLint i;
-#if defined(_EGL_OS_WINDOWS)
- const char *DefaultDriverNames[] = {
- "egl_gallium"
- };
-#elif defined(_EGL_OS_UNIX)
- const char *DefaultDriverNames[] = {
- "egl_gallium",
- "egl_dri2",
- "egl_glx"
- };
-#endif
-
- for (i = 0; i < ARRAY_SIZE(DefaultDriverNames); i++) {
- void *name = (void *) DefaultDriverNames[i];
- _eglPreloadForEach(search_path, _eglLoaderFile, name);
- }
-}
-
-
-/**
- * Add drivers to the module array. Drivers will be loaded as they are matched
- * to displays.
- */
-static EGLBoolean
-_eglAddDrivers(void)
-{
- if (_eglModules)
- return EGL_TRUE;
-
- /* the order here decides the priorities of the drivers */
- _eglAddUserDriver();
- _eglAddDefaultDrivers();
- _eglPreloadForEach(_eglGetSearchPath(), _eglLoaderPattern, (void *) "egl_");
-
- return (_eglModules != NULL);
-}
-
-
-/**
- * Match a display to a driver. The display is initialized unless use_probe is
- * true.
- *
- * The matching is done by finding the first driver that can initialize the
- * display, or when use_probe is true, the driver with highest score.
+ * Match a display to a driver. The matching is done by finding the first
+ * driver that can initialize the display.
*/
_EGLDriver *
-_eglMatchDriver(_EGLDisplay *dpy, EGLBoolean use_probe)
+_eglMatchDriver(_EGLDisplay *disp)
{
- _EGLModule *mod;
- _EGLDriver *best_drv = NULL;
- EGLint best_score = 0;
- EGLint major, minor, i;
+ _EGLDriver *best_drv;
- _eglLockMutex(&_eglModuleMutex);
-
- if (!_eglAddDrivers()) {
- _eglUnlockMutex(&_eglModuleMutex);
- return EGL_FALSE;
- }
+ assert(!disp->Initialized);
- /* match the loaded modules */
- for (i = 0; i < _eglModules->Size; i++) {
- mod = (_EGLModule *) _eglModules->Elements[i];
- if (!mod->Driver)
- break;
+ /* set options */
+ disp->Options.ForceSoftware =
+ env_var_as_boolean("LIBGL_ALWAYS_SOFTWARE", false);
+ if (disp->Options.ForceSoftware)
+ _eglLog(_EGL_DEBUG, "Found 'LIBGL_ALWAYS_SOFTWARE' set, will use a CPU renderer");
- if (use_probe) {
- EGLint score = (mod->Driver->Probe) ?
- mod->Driver->Probe(mod->Driver, dpy) : 1;
- if (score > best_score) {
- best_drv = mod->Driver;
- best_score = score;
- }
- }
- else {
- if (mod->Driver->API.Initialize(mod->Driver, dpy, &major, &minor)) {
- best_drv = mod->Driver;
- best_score = 100;
- }
- }
- /* perfect match */
- if (best_score >= 100)
- break;
+ best_drv = _eglMatchAndInitialize(disp);
+ if (!best_drv && !disp->Options.ForceSoftware) {
+ disp->Options.ForceSoftware = EGL_TRUE;
+ best_drv = _eglMatchAndInitialize(disp);
}
- /* load more modules */
- if (!best_drv) {
- EGLint first_unloaded = i;
-
- while (i < _eglModules->Size) {
- mod = (_EGLModule *) _eglModules->Elements[i];
- assert(!mod->Driver);
-
- if (!_eglLoadModule(mod)) {
- /* remove invalid modules */
- _eglEraseArray(_eglModules, i, _eglFreeModule);
- continue;
- }
-
- if (use_probe) {
- best_score = (mod->Driver->Probe) ?
- mod->Driver->Probe(mod->Driver, dpy) : 1;
- }
- else {
- if (mod->Driver->API.Initialize(mod->Driver, dpy, &major, &minor))
- best_score = 100;
- }
-
- if (best_score > 0) {
- best_drv = mod->Driver;
- /* loaded modules come before unloaded ones */
- if (first_unloaded != i) {
- void *tmp = _eglModules->Elements[i];
- _eglModules->Elements[i] =
- _eglModules->Elements[first_unloaded];
- _eglModules->Elements[first_unloaded] = tmp;
- }
- break;
- }
- else {
- _eglUnloadModule(mod);
- i++;
- }
- }
- }
-
- _eglUnlockMutex(&_eglModuleMutex);
-
if (best_drv) {
- _eglLog(_EGL_DEBUG, "the best driver is %s (score %d)",
- best_drv->Name, best_score);
- if (!use_probe) {
- dpy->Driver = best_drv;
- dpy->Initialized = EGL_TRUE;
- dpy->APImajor = major;
- dpy->APIminor = minor;
- }
+ disp->Driver = best_drv;
+ disp->Initialized = EGL_TRUE;
}
return best_drv;
}
-
__eglMustCastToProperFunctionPointerType
_eglGetDriverProc(const char *procname)
{
- EGLint i;
- _EGLProc proc = NULL;
-
- if (!_eglModules) {
- /* load the driver for the default display */
- EGLDisplay egldpy = eglGetDisplay(EGL_DEFAULT_DISPLAY);
- _EGLDisplay *dpy = _eglLookupDisplay(egldpy);
- if (!dpy || !_eglMatchDriver(dpy, EGL_TRUE))
- return NULL;
- }
-
- for (i = 0; i < _eglModules->Size; i++) {
- _EGLModule *mod = (_EGLModule *) _eglModules->Elements[i];
+ if (_eglGetDriver() && _eglDriver->API.GetProcAddress)
+ return _eglDriver->API.GetProcAddress(_eglDriver, procname);
- if (!mod->Driver)
- break;
- proc = mod->Driver->API.GetProcAddress(mod->Driver, procname);
- if (proc)
- break;
- }
-
- return proc;
+ return NULL;
}
-
/**
* Unload all drivers.
*/
_eglUnloadDrivers(void)
{
/* this is called at atexit time */
- if (_eglModules) {
-#if defined(_EGL_OS_UNIX)
- _eglDestroyArray(_eglModules, _eglFreeModule);
-#elif defined(_EGL_OS_WINDOWS)
- /* XXX Windows unloads DLLs before atexit */
- _eglDestroyArray(_eglModules, NULL);
-#endif
- _eglModules = NULL;
- }
-}
-
-
-/**
- * Plug all the available fallback routines into the given driver's
- * dispatch table.
- */
-void
-_eglInitDriverFallbacks(_EGLDriver *drv)
-{
- /* If a pointer is set to NULL, then the device driver _really_ has
- * to implement it.
- */
- drv->API.Initialize = NULL;
- drv->API.Terminate = NULL;
-
- drv->API.GetConfigs = _eglGetConfigs;
- drv->API.ChooseConfig = _eglChooseConfig;
- drv->API.GetConfigAttrib = _eglGetConfigAttrib;
-
- drv->API.CreateContext = _eglCreateContext;
- drv->API.DestroyContext = _eglDestroyContext;
- drv->API.MakeCurrent = _eglMakeCurrent;
- drv->API.QueryContext = _eglQueryContext;
-
- drv->API.CreateWindowSurface = _eglCreateWindowSurface;
- drv->API.CreatePixmapSurface = _eglCreatePixmapSurface;
- drv->API.CreatePbufferSurface = _eglCreatePbufferSurface;
- drv->API.DestroySurface = _eglDestroySurface;
- drv->API.QuerySurface = _eglQuerySurface;
- drv->API.SurfaceAttrib = _eglSurfaceAttrib;
- drv->API.BindTexImage = _eglBindTexImage;
- drv->API.ReleaseTexImage = _eglReleaseTexImage;
- drv->API.SwapInterval = _eglSwapInterval;
- drv->API.SwapBuffers = _eglSwapBuffers;
- drv->API.CopyBuffers = _eglCopyBuffers;
-
- drv->API.QueryString = _eglQueryString;
- drv->API.WaitClient = _eglWaitClient;
- drv->API.WaitNative = _eglWaitNative;
-
-#ifdef EGL_MESA_screen_surface
- drv->API.ChooseModeMESA = _eglChooseModeMESA;
- drv->API.GetModesMESA = _eglGetModesMESA;
- drv->API.GetModeAttribMESA = _eglGetModeAttribMESA;
- drv->API.GetScreensMESA = _eglGetScreensMESA;
- drv->API.CreateScreenSurfaceMESA = _eglCreateScreenSurfaceMESA;
- drv->API.ShowScreenSurfaceMESA = _eglShowScreenSurfaceMESA;
- drv->API.ScreenPositionMESA = _eglScreenPositionMESA;
- drv->API.QueryScreenMESA = _eglQueryScreenMESA;
- drv->API.QueryScreenSurfaceMESA = _eglQueryScreenSurfaceMESA;
- drv->API.QueryScreenModeMESA = _eglQueryScreenModeMESA;
- drv->API.QueryModeStringMESA = _eglQueryModeStringMESA;
-#endif /* EGL_MESA_screen_surface */
-
-#ifdef EGL_VERSION_1_2
- drv->API.CreatePbufferFromClientBuffer = _eglCreatePbufferFromClientBuffer;
-#endif /* EGL_VERSION_1_2 */
-
-#ifdef EGL_KHR_image_base
- drv->API.CreateImageKHR = _eglCreateImageKHR;
- drv->API.DestroyImageKHR = _eglDestroyImageKHR;
-#endif /* EGL_KHR_image_base */
-
-#ifdef EGL_KHR_reusable_sync
- drv->API.CreateSyncKHR = _eglCreateSyncKHR;
- drv->API.DestroySyncKHR = _eglDestroySyncKHR;
- drv->API.ClientWaitSyncKHR = _eglClientWaitSyncKHR;
- drv->API.SignalSyncKHR = _eglSignalSyncKHR;
- drv->API.GetSyncAttribKHR = _eglGetSyncAttribKHR;
-#endif /* EGL_KHR_reusable_sync */
-}
-
-
-/**
- * Invoke a callback function on each EGL search path.
- *
- * The first argument of the callback function is the name of the search path.
- * The second argument is the length of the name.
- */
-void
-_eglSearchPathForEach(EGLBoolean (*callback)(const char *, size_t, void *),
- void *callback_data)
-{
- const char *search_path = _eglGetSearchPath();
- _eglPreloadForEach(search_path, callback, callback_data);
+ free(_eglDriver);
+ _eglDriver = NULL;
}
projects / mesa.git / blobdiff