+/**************************************************************************
+ *
+ * Copyright 2008 Tungsten Graphics, Inc., Cedar Park, Texas.
+ * 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 "eglconfig.h"
-#include "eglcontext.h"
+
+#include "eglstring.h"
#include "egldefines.h"
#include "egldisplay.h"
#include "egldriver.h"
-#include "eglglobals.h"
#include "egllog.h"
-#include "eglmisc.h"
-#include "eglmode.h"
-#include "eglscreen.h"
-#include "eglstring.h"
-#include "eglsurface.h"
+#include "eglmutex.h"
-#if defined(_EGL_PLATFORM_POSIX)
+#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;
+ _EGLMain_t BuiltIn;
+ void *Handle;
+ _EGLDriver *Driver;
+} _EGLModule;
+
+static _EGL_DECLARE_MUTEX(_eglModuleMutex);
+static _EGLArray *_eglModules;
+
+const struct {
+ const char *name;
+ _EGLMain_t main;
+} _eglBuiltInDrivers[] = {
+#ifdef _EGL_BUILT_IN_DRIVER_GALLIUM
+ { "egl_gallium", _eglBuiltInDriverGALLIUM },
+#endif
+#ifdef _EGL_BUILT_IN_DRIVER_DRI2
+ { "egl_dri2", _eglBuiltInDriverDRI2 },
+#endif
+#ifdef _EGL_BUILT_IN_DRIVER_GLX
+ { "egl_glx", _eglBuiltInDriverGLX },
+#endif
+ { NULL, NULL }
+};
+
/**
* Wrappers for dlopen/dlclose()
*/
-#if defined(_EGL_PLATFORM_WINDOWS)
-
+#if defined(_EGL_OS_WINDOWS)
-/* XXX Need to decide how to do dynamic name lookup on Windows */
-static const char DefaultDriverName[] = "TBD";
typedef HMODULE lib_handle;
static const char *
library_suffix(void)
{
- return "dll";
+ return ".dll";
}
-#elif defined(_EGL_PLATFORM_POSIX)
+#elif defined(_EGL_OS_UNIX)
-static const char DefaultDriverName[] = "egl_glx";
-
typedef void * lib_handle;
static void *
static const char *
library_suffix(void)
{
- return "so";
-}
-
-
-#else /* _EGL_PLATFORM_NO_OS */
-
-static const char DefaultDriverName[] = "builtin";
-
-typedef void *lib_handle;
-
-static INLINE void *
-open_library(const char *filename)
-{
- return (void *) filename;
-}
-
-static INLINE void
-close_library(void *lib)
-{
-}
-
-
-static const char *
-library_suffix(void)
-{
- return NULL;
+ return ".so";
}
#endif
-#define NUM_PROBE_CACHE_SLOTS 8
-static struct {
- EGLint keys[NUM_PROBE_CACHE_SLOTS];
- const void *values[NUM_PROBE_CACHE_SLOTS];
-} _eglProbeCache;
-
-
/**
* Open the named driver and find its bootstrap function: _eglMain().
*/
_eglLog(_EGL_DEBUG, "dlopen(%s)", driverPath);
lib = open_library(driverPath);
-#if defined(_EGL_PLATFORM_WINDOWS)
+#if defined(_EGL_OS_WINDOWS)
/* XXX untested */
if (lib)
mainFunc = (_EGLMain_t) GetProcAddress(lib, "_eglMain");
-#elif defined(_EGL_PLATFORM_POSIX)
+#elif defined(_EGL_OS_UNIX)
if (lib) {
- mainFunc = (_EGLMain_t) dlsym(lib, "_eglMain");
+ 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();
}
-#else /* _EGL_PLATFORM_NO_OS */
- /* must be the default driver name */
- if (strcmp(driverPath, DefaultDriverName) == 0)
- mainFunc = (_EGLMain_t) _eglMain;
- else
- error = "not builtin driver";
#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;
}
/**
- * Load the named driver.
+ * Load a module and create the driver object.
*/
-static _EGLDriver *
-_eglLoadDriver(const char *path, const char *args)
+static EGLBoolean
+_eglLoadModule(_EGLModule *mod)
{
_EGLMain_t mainFunc;
lib_handle lib;
- _EGLDriver *drv = NULL;
+ _EGLDriver *drv;
- mainFunc = _eglOpenLibrary(path, &lib);
- if (!mainFunc)
- return NULL;
+ if (mod->Driver)
+ return EGL_TRUE;
- drv = mainFunc(args);
+ if (mod->BuiltIn) {
+ lib = (lib_handle) NULL;
+ mainFunc = mod->BuiltIn;
+ }
+ else {
+ mainFunc = _eglOpenLibrary(mod->Path, &lib);
+ if (!mainFunc)
+ return EGL_FALSE;
+ }
+
+ drv = mainFunc(NULL);
if (!drv) {
if (lib)
close_library(lib);
- return NULL;
+ return EGL_FALSE;
}
if (!drv->Name) {
- _eglLog(_EGL_WARNING, "Driver loaded from %s has no name", path);
+ _eglLog(_EGL_WARNING, "Driver loaded from %s has no name", mod->Path);
drv->Name = "UNNAMED";
}
- drv->Path = _eglstrdup(path);
- drv->Args = (args) ? _eglstrdup(args) : NULL;
- if (!drv->Path || (args && !drv->Args)) {
- if (drv->Path)
- free((char *) drv->Path);
- if (drv->Args)
- free((char *) drv->Args);
- drv->Unload(drv);
- if (lib)
- close_library(lib);
- return NULL;
- }
-
- drv->LibHandle = lib;
+ mod->Handle = (void *) lib;
+ mod->Driver = drv;
- return drv;
+ return EGL_TRUE;
}
/**
- * Match a display to a preloaded driver.
- *
- * The matching is done by finding the driver with the highest score.
+ * Unload a module.
*/
-static _EGLDriver *
-_eglMatchDriver(_EGLDisplay *dpy)
+static void
+_eglUnloadModule(_EGLModule *mod)
{
- _EGLDriver *best_drv = NULL;
- EGLint best_score = -1, i;
-
- for (i = 0; i < _eglGlobal.NumDrivers; i++) {
- _EGLDriver *drv = _eglGlobal.Drivers[i];
- EGLint score;
-
- score = (drv->Probe) ? drv->Probe(drv, dpy) : 0;
- if (score > best_score) {
- if (best_drv) {
- _eglLog(_EGL_DEBUG, "driver %s has higher score than %s",
- drv->Name, best_drv->Name);
- }
-
- best_drv = drv;
- best_score = score;
- /* perfect match */
- if (score >= 100)
- break;
- }
- }
+#if defined(_EGL_OS_UNIX)
+ /* destroy the driver */
+ if (mod->Driver && mod->Driver->Unload)
+ mod->Driver->Unload(mod->Driver);
+
+ /*
+ * XXX At this point (atexit), the module might be the last reference to
+ * libEGL. Closing the module might unmap libEGL and give problems.
+ */
+#if 0
+ if (mod->Handle)
+ close_library(mod->Handle);
+#endif
+#elif defined(_EGL_OS_WINDOWS)
+ /* XXX Windows unloads DLLs before atexit */
+#endif
- return best_drv;
+ mod->Driver = NULL;
+ mod->Handle = NULL;
}
/**
- * Open a preloaded driver.
+ * Add a module to the module array.
*/
-_EGLDriver *
-_eglOpenDriver(_EGLDisplay *dpy)
+static _EGLModule *
+_eglAddModule(const char *path)
{
- _EGLDriver *drv = _eglMatchDriver(dpy);
- return drv;
+ _EGLModule *mod;
+ EGLint i;
+
+ if (!_eglModules) {
+ _eglModules = _eglCreateArray("Module", 8);
+ if (!_eglModules)
+ 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);
+ }
+
+ return mod;
}
/**
- * Close a preloaded driver.
+ * Free a module.
*/
-EGLBoolean
-_eglCloseDriver(_EGLDriver *drv, _EGLDisplay *dpy)
+static void
+_eglFreeModule(void *module)
{
- return EGL_TRUE;
+ _EGLModule *mod = (_EGLModule *) module;
+
+ _eglUnloadModule(mod);
+ free(mod->Path);
+ free(mod);
}
/**
- * Preload a user driver.
- *
- * A user driver can be specified by EGL_DRIVER.
+ * 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
-_eglPreloadUserDriver(void)
+_eglLoaderFile(const char *dir, size_t len, void *loader_data)
{
-#if defined(_EGL_PLATFORM_POSIX) || defined(_EGL_PLATFORM_WINDOWS)
- _EGLDriver *drv;
- char *env, *path;
- const char *suffix, *p;
+ char path[1024];
+ const char *filename = (const char *) loader_data;
+ size_t flen = strlen(filename);
- env = getenv("EGL_DRIVER");
- if (!env)
- return EGL_FALSE;
+ /* 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';
- path = env;
- suffix = library_suffix();
-
- /* append suffix if there isn't */
- p = strrchr(path, '.');
- if (!p && suffix) {
- size_t len = strlen(path);
- char *tmp = malloc(len + strlen(suffix) + 2);
- if (tmp) {
- memcpy(tmp, path, len);
- tmp[len++] = '.';
- tmp[len] = '\0';
- strcat(tmp + len, suffix);
-
- path = tmp;
+ 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);
}
}
- drv = _eglLoadDriver(path, NULL);
- if (path != env)
- free(path);
- if (!drv)
- return EGL_FALSE;
+#if defined(_EGL_OS_UNIX)
+ /* check if the file exists */
+ if (access(path, F_OK))
+ return EGL_TRUE;
+#endif
- _eglGlobal.Drivers[_eglGlobal.NumDrivers++] = drv;
+ _eglAddModule(path);
return EGL_TRUE;
-#else /* _EGL_PLATFORM_POSIX || _EGL_PLATFORM_WINDOWS */
- return EGL_FALSE;
-#endif
}
/**
- * Preload display drivers.
- *
- * Display drivers are a set of drivers that support a certain display system.
- * The display system may be specified by EGL_DISPLAY.
+ * Run the callback function on each driver directory.
*
- * FIXME This makes libEGL a memory hog if an user driver is not specified and
- * there are many display drivers.
+ * The process may end prematurely if the callback function returns false.
*/
-static EGLBoolean
-_eglPreloadDisplayDrivers(void)
+static void
+_eglPreloadForEach(const char *search_path,
+ EGLBoolean (*loader)(const char *, size_t, void *),
+ void *loader_data)
{
-#if defined(_EGL_PLATFORM_POSIX)
- const char *dpy, *suffix;
- char path[1024], prefix[32];
- DIR *dirp;
- struct dirent *dirent;
-
- dpy = getenv("EGL_DISPLAY");
- if (!dpy || !dpy[0])
- dpy = _EGL_DEFAULT_DISPLAY;
- if (!dpy || !dpy[0])
- return EGL_FALSE;
+ const char *cur, *next;
+ size_t len;
- snprintf(prefix, sizeof(prefix), "egl_%s_", dpy);
- suffix = library_suffix();
+ cur = search_path;
+ while (cur) {
+ next = strchr(cur, ':');
+ len = (next) ? next - cur : strlen(cur);
- dirp = opendir(_EGL_DRIVER_SEARCH_DIR);
- if (!dirp)
- return EGL_FALSE;
+ if (!loader(cur, len, loader_data))
+ break;
- while ((dirent = readdir(dirp))) {
- _EGLDriver *drv;
- const char *p;
+ cur = (next) ? next + 1 : NULL;
+ }
+}
- /* match the prefix */
- if (strncmp(dirent->d_name, prefix, strlen(prefix)) != 0)
- continue;
- /* match the suffix */
- p = strrchr(dirent->d_name, '.');
- if ((p && !suffix) || (!p && suffix))
- continue;
- else if (p && suffix && strcmp(p + 1, suffix) != 0)
- continue;
+/**
+ * Return a list of colon-separated driver directories.
+ */
+static const char *
+_eglGetSearchPath(void)
+{
+ static char search_path[1024];
+
+#if defined(_EGL_OS_UNIX) || defined(_EGL_OS_WINDOWS)
+ if (search_path[0] == '\0') {
+ char *buf = search_path;
+ size_t len = sizeof(search_path);
+ EGLBoolean use_env;
+ char dir_sep;
+ int ret;
+
+#if defined(_EGL_OS_UNIX)
+ use_env = (geteuid() == getuid() && getegid() == getgid());
+ dir_sep = '/';
+#else
+ use_env = EGL_TRUE;
+ dir_sep = '\\';
+#endif
- snprintf(path, sizeof(path),
- _EGL_DRIVER_SEARCH_DIR"/%s", dirent->d_name);
+ if (use_env) {
+ char *p;
- drv = _eglLoadDriver(path, NULL);
- if (drv)
- _eglGlobal.Drivers[_eglGlobal.NumDrivers++] = drv;
- }
+ /* extract the dirname from EGL_DRIVER */
+ p = getenv("EGL_DRIVER");
+ if (p && strchr(p, dir_sep)) {
+ ret = _eglsnprintf(buf, len, "%s", p);
+ if (ret > 0 && ret < len) {
+ p = strrchr(buf, dir_sep);
+ *p++ = ':';
- closedir(dirp);
+ len -= p - buf;
+ buf = p;
+ }
+ }
- return (_eglGlobal.NumDrivers > 0);
-#else /* _EGL_PLATFORM_POSIX */
- return EGL_FALSE;
-#endif
+ /* append EGL_DRIVERS_PATH */
+ p = getenv("EGL_DRIVERS_PATH");
+ if (p) {
+ ret = _eglsnprintf(buf, len, "%s:", p);
+ if (ret > 0 && ret < len) {
+ buf += ret;
+ len -= ret;
+ }
+ }
+ }
+ else {
+ _eglLog(_EGL_DEBUG,
+ "ignore EGL_DRIVERS_PATH for setuid/setgid binaries");
+ }
+
+ ret = _eglsnprintf(buf, len, "%s", _EGL_DRIVER_SEARCH_DIR);
+ if (ret < 0 || ret >= len)
+ search_path[0] = '\0';
+
+ _eglLog(_EGL_DEBUG, "EGL search path is %s", search_path);
+ }
+#endif /* defined(_EGL_OS_UNIX) || defined(_EGL_OS_WINDOWS) */
+
+ return search_path;
}
/**
- * Preload the default driver.
+ * Add the user driver to the module array.
+ *
+ * The user driver is specified by EGL_DRIVER.
*/
static EGLBoolean
-_eglPreloadDefaultDriver(void)
+_eglAddUserDriver(void)
{
- _EGLDriver *drv;
- char path[1024];
- const char *suffix = library_suffix();
+ const char *search_path = _eglGetSearchPath();
+ char *env;
+ size_t name_len = 0;
- if (suffix)
- snprintf(path, sizeof(path), "%s.%s", DefaultDriverName, suffix);
- else
- snprintf(path, sizeof(path), DefaultDriverName);
+ 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;
+ }
+ }
+ else if (env) {
+ char *suffix = strchr(env, '.');
+ name_len = (suffix) ? suffix - env : strlen(env);
+ }
+#else
+ if (env)
+ name_len = strlen(env);
+#endif /* _EGL_OS_UNIX */
+
+ /*
+ * Try built-in drivers first if we know the driver name. This makes sure
+ * we do not load the outdated external driver that is still on the
+ * filesystem.
+ */
+ if (name_len) {
+ _EGLModule *mod;
+ EGLint i;
+
+ for (i = 0; _eglBuiltInDrivers[i].name; i++) {
+ if (strlen(_eglBuiltInDrivers[i].name) == name_len &&
+ !strncmp(_eglBuiltInDrivers[i].name, env, name_len)) {
+ mod = _eglAddModule(env);
+ if (mod)
+ mod->BuiltIn = _eglBuiltInDrivers[i].main;
+
+ return EGL_TRUE;
+ }
+ }
+ }
- drv = _eglLoadDriver(path, NULL);
- if (!drv)
- return EGL_FALSE;
+ /* otherwise, treat env as a path */
+ if (env) {
+ _eglPreloadForEach(search_path, _eglLoaderFile, (void *) env);
- _eglGlobal.Drivers[_eglGlobal.NumDrivers++] = drv;
+ return EGL_TRUE;
+ }
- return EGL_TRUE;
+ return EGL_FALSE;
}
/**
- * Preload drivers.
- *
- * This function loads the driver modules and creates the corresponding
- * _EGLDriver objects.
+ * Add egl_gallium to the module array.
*/
-EGLBoolean
-_eglPreloadDrivers(void)
+static void
+_eglAddGalliumDriver(void)
{
- EGLBoolean loaded;
-
- /* already preloaded */
- if (_eglGlobal.NumDrivers)
- return EGL_TRUE;
-
- loaded = (_eglPreloadUserDriver() ||
- _eglPreloadDisplayDrivers() ||
- _eglPreloadDefaultDriver());
-
- return loaded;
+#ifndef _EGL_BUILT_IN_DRIVER_GALLIUM
+ void *external = (void *) "egl_gallium";
+ _eglPreloadForEach(_eglGetSearchPath(), _eglLoaderFile, external);
+#endif
}
/**
- * Unload preloaded drivers.
+ * Add built-in drivers to the module array.
*/
-void
-_eglUnloadDrivers(void)
+static void
+_eglAddBuiltInDrivers(void)
{
+ _EGLModule *mod;
EGLint i;
- for (i = 0; i < _eglGlobal.NumDrivers; i++) {
- _EGLDriver *drv = _eglGlobal.Drivers[i];
- lib_handle handle = drv->LibHandle;
-
- if (drv->Path)
- free((char *) drv->Path);
- if (drv->Args)
- free((char *) drv->Args);
-
- /* destroy driver */
- if (drv->Unload)
- drv->Unload(drv);
-
- if (handle)
- close_library(handle);
- _eglGlobal.Drivers[i] = NULL;
- }
- _eglGlobal.NumDrivers = 0;
+ for (i = 0; _eglBuiltInDrivers[i].name; i++) {
+ mod = _eglAddModule(_eglBuiltInDrivers[i].name);
+ if (mod)
+ mod->BuiltIn = _eglBuiltInDrivers[i].main;
+ }
}
/**
- * Plug all the available fallback routines into the given driver's
- * dispatch table.
+ * Add drivers to the module array. Drivers will be loaded as they are matched
+ * to displays.
*/
-void
-_eglInitDriverFallbacks(_EGLDriver *drv)
+static EGLBoolean
+_eglAddDrivers(void)
{
- /* 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 */
-}
+ if (_eglModules)
+ return EGL_TRUE;
+ if (!_eglAddUserDriver()) {
+ /*
+ * Add other drivers only when EGL_DRIVER is not set. The order here
+ * decides the priorities.
+ */
+ _eglAddGalliumDriver();
+ _eglAddBuiltInDrivers();
+ }
+
+ return (_eglModules != NULL);
+}
/**
- * Try to determine which EGL APIs (OpenGL, OpenGL ES, OpenVG, etc)
- * are supported on the system by looking for standard library names.
+ * A helper function for _eglMatchDriver. It finds the first driver that can
+ * initialize the display and return.
*/
-EGLint
-_eglFindAPIs(void)
+static _EGLDriver *
+_eglMatchAndInitialize(_EGLDisplay *dpy)
{
- EGLint mask = 0x0;
- lib_handle lib;
-#if defined(_EGL_PLATFORM_WINDOWS)
- /* XXX not sure about these names */
- const char *es1_libname = "libGLESv1_CM.dll";
- const char *es2_libname = "libGLESv2.dll";
- const char *gl_libname = "OpenGL32.dll";
- const char *vg_libname = "libOpenVG.dll";
-#elif defined(_EGL_PLATFORM_POSIX)
- const char *es1_libname = "libGLESv1_CM.so";
- const char *es2_libname = "libGLESv2.so";
- const char *gl_libname = "libGL.so";
- const char *vg_libname = "libOpenVG.so";
-#else /* _EGL_PLATFORM_NO_OS */
- const char *es1_libname = NULL;
- const char *es2_libname = NULL;
- const char *gl_libname = NULL;
- const char *vg_libname = NULL;
-#endif
+ _EGLDriver *drv = NULL;
+ EGLint i = 0;
- if ((lib = open_library(es1_libname))) {
- close_library(lib);
- mask |= EGL_OPENGL_ES_BIT;
+ if (!_eglAddDrivers()) {
+ _eglLog(_EGL_WARNING, "failed to find any driver");
+ return NULL;
}
- if ((lib = open_library(es2_libname))) {
- close_library(lib);
- mask |= EGL_OPENGL_ES2_BIT;
+ if (dpy->Driver) {
+ drv = dpy->Driver;
+ /* no re-matching? */
+ if (!drv->API.Initialize(drv, dpy))
+ drv = NULL;
+ return drv;
}
- if ((lib = open_library(gl_libname))) {
- close_library(lib);
- mask |= EGL_OPENGL_BIT;
- }
+ while (i < _eglModules->Size) {
+ _EGLModule *mod = (_EGLModule *) _eglModules->Elements[i];
+
+ if (!_eglLoadModule(mod)) {
+ /* remove invalid modules */
+ _eglEraseArray(_eglModules, i, _eglFreeModule);
+ continue;
+ }
- if ((lib = open_library(vg_libname))) {
- close_library(lib);
- mask |= EGL_OPENVG_BIT;
+ if (mod->Driver->API.Initialize(mod->Driver, dpy)) {
+ drv = mod->Driver;
+ break;
+ }
+ else {
+ i++;
+ }
}
- return mask;
+ return drv;
}
/**
- * Set the probe cache at the given key.
- *
- * A key, instead of a _EGLDriver, is used to allow the probe cache to be share
- * by multiple drivers.
+ * Match a display to a driver. The display is initialized unless test_only is
+ * true. The matching is done by finding the first driver that can initialize
+ * the display.
*/
-void
-_eglSetProbeCache(EGLint key, const void *val)
+_EGLDriver *
+_eglMatchDriver(_EGLDisplay *dpy, EGLBoolean test_only)
{
- EGLint idx;
+ _EGLDriver *best_drv;
+
+ assert(!dpy->Initialized);
+
+ _eglLockMutex(&_eglModuleMutex);
+
+ /* set options */
+ dpy->Options.TestOnly = test_only;
+ dpy->Options.UseFallback = EGL_FALSE;
+
+ best_drv = _eglMatchAndInitialize(dpy);
+ if (!best_drv) {
+ dpy->Options.UseFallback = EGL_TRUE;
+ best_drv = _eglMatchAndInitialize(dpy);
+ }
- for (idx = 0; idx < NUM_PROBE_CACHE_SLOTS; idx++) {
- if (!_eglProbeCache.keys[idx] || _eglProbeCache.keys[idx] == key)
+ _eglUnlockMutex(&_eglModuleMutex);
+
+ if (best_drv) {
+ _eglLog(_EGL_DEBUG, "the best driver is %s%s",
+ best_drv->Name, (test_only) ? " (test only) " : "");
+ if (!test_only) {
+ dpy->Driver = best_drv;
+ dpy->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 (!mod->Driver)
+ break;
+ proc = mod->Driver->API.GetProcAddress(mod->Driver, procname);
+ if (proc)
break;
}
- assert(key > 0);
- assert(idx < NUM_PROBE_CACHE_SLOTS);
- _eglProbeCache.keys[idx] = key;
- _eglProbeCache.values[idx] = val;
+ return proc;
}
/**
- * Return the probe cache at the given key.
+ * Unload all drivers.
*/
-const void *
-_eglGetProbeCache(EGLint key)
+void
+_eglUnloadDrivers(void)
{
- EGLint idx;
-
- for (idx = 0; idx < NUM_PROBE_CACHE_SLOTS; idx++) {
- if (!_eglProbeCache.keys[idx] || _eglProbeCache.keys[idx] == key)
- break;
+ /* this is called at atexit time */
+ if (_eglModules) {
+ _eglDestroyArray(_eglModules, _eglFreeModule);
+ _eglModules = NULL;
}
+}
- return (idx < NUM_PROBE_CACHE_SLOTS && _eglProbeCache.keys[idx] == key) ?
- _eglProbeCache.values[idx] : NULL;
+
+/**
+ * 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);
}
projects / mesa.git / blobdiff