+/**************************************************************************
+ *
+ * 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 "eglglobals.h"
#include "egllog.h"
-#include "eglmisc.h"
-#include "eglmode.h"
-#include "eglscreen.h"
-#include "eglstring.h"
-#include "eglsurface.h"
-#include "eglimage.h"
-#if defined(_EGL_OS_UNIX)
-#include <dlfcn.h>
-#include <sys/types.h>
-#include <dirent.h>
-#include <unistd.h>
-#endif
+#include "util/debug.h"
+extern const _EGLDriver _eglDriver;
/**
- * Wrappers for dlopen/dlclose()
+ * Initialize the display using the driver's function.
+ * If the initialisation fails, try again using only software rendering.
*/
-#if defined(_EGL_OS_WINDOWS)
-
-
-/* XXX Need to decide how to do dynamic name lookup on Windows */
-static const char *DefaultDriverNames[] = {
- "egl_gallium"
-};
-
-typedef HMODULE lib_handle;
-
-static HMODULE
-open_library(const char *filename)
+bool
+_eglInitializeDisplay(_EGLDisplay *disp)
{
- return LoadLibrary(filename);
-}
-
-static void
-close_library(HMODULE lib)
-{
- FreeLibrary(lib);
-}
-
-
-static const char *
-library_suffix(void)
-{
- return ".dll";
-}
-
-
-#elif defined(_EGL_OS_UNIX)
-
+ assert(!disp->Initialized);
-static const char *DefaultDriverNames[] = {
- "egl_gallium",
- "egl_dri2",
- "egl_glx"
-};
+ /* 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");
-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();
+ if (_eglDriver.Initialize(disp)) {
+ disp->Driver = &_eglDriver;
+ disp->Initialized = EGL_TRUE;
+ return true;
}
-#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;
-}
-
-
-/**
- * Load the named driver.
- */
-static _EGLDriver *
-_eglLoadDriver(const char *path, const char *args)
-{
- _EGLMain_t mainFunc;
- lib_handle lib;
- _EGLDriver *drv = NULL;
-
- mainFunc = _eglOpenLibrary(path, &lib);
- if (!mainFunc)
- return NULL;
-
- drv = mainFunc(args);
- if (!drv) {
- if (lib)
- close_library(lib);
- return NULL;
- }
-
- if (!drv->Name) {
- _eglLog(_EGL_WARNING, "Driver loaded from %s has no name", 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;
-
- return drv;
-}
+ if (disp->Options.ForceSoftware)
+ return false;
-/**
- * Match a display to a preloaded driver.
- *
- * The matching is done by finding the driver with the highest score.
- */
-_EGLDriver *
-_eglMatchDriver(_EGLDisplay *dpy)
-{
- _EGLDriver *best_drv = NULL;
- EGLint best_score = -1, i;
-
- /*
- * this function is called after preloading and the drivers never change
- * after preloading.
- */
- 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);
- }
+ disp->Options.ForceSoftware = EGL_TRUE;
+ if (!_eglDriver.Initialize(disp))
+ return false;
- best_drv = drv;
- best_score = score;
- /* perfect match */
- if (score >= 100)
- break;
- }
- }
-
- return best_drv;
+ disp->Driver = &_eglDriver;
+ disp->Initialized = EGL_TRUE;
+ return true;
}
-
-/**
- * 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)
+__eglMustCastToProperFunctionPointerType
+_eglGetDriverProc(const char *procname)
{
- _EGLDriver *drv;
- char path[1024];
- const char *filename = (const char *) loader_data;
- size_t flen = strlen(filename);
+ if (_eglDriver.GetProcAddress)
+ return _eglDriver.GetProcAddress(procname);
- /* 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 (library_suffix() == NULL || strstr(path, library_suffix()))
- drv = _eglLoadDriver(path, NULL);
- else {
- 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 && len + slen + 1 <= sizeof(path)) {
- strcpy(path + len, suffix);
- drv = _eglLoadDriver(path, NULL);
- } else {
- drv = NULL;
- }
- }
- if (!drv)
- return EGL_TRUE;
-
- /* remember the driver and stop */
- _eglGlobal.Drivers[_eglGlobal.NumDrivers++] = drv;
- return EGL_FALSE;
-}
-
-
-/**
- * Run the preload function on each driver directory and return the number of
- * drivers loaded.
- *
- * The process may end prematurely if the callback function returns false.
- */
-static EGLint
-_eglPreloadForEach(const char *search_path,
- EGLBoolean (*loader)(const char *, size_t, void *),
- void *loader_data)
-{
- const char *cur, *next;
- size_t len;
- EGLint num_drivers = _eglGlobal.NumDrivers;
-
- 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 (_eglGlobal.NumDrivers - num_drivers);
-}
-
-
-/**
- * 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;
-}
-
-
-/**
- * Preload a user driver.
- *
- * A user driver can be specified by EGL_DRIVER.
- */
-static EGLBoolean
-_eglPreloadUserDriver(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)
- return EGL_FALSE;
-
- if (!_eglPreloadForEach(search_path, _eglLoaderFile, (void *) env)) {
- _eglLog(_EGL_WARNING, "EGL_DRIVER is set to an invalid driver");
- return EGL_FALSE;
- }
-
- return EGL_TRUE;
-}
-
-
-/**
- * Preload drivers.
- *
- * This function loads the driver modules and creates the corresponding
- * _EGLDriver objects.
- */
-EGLBoolean
-_eglPreloadDrivers(void)
-{
- EGLBoolean loaded;
-
- /* protect the preloading process */
- _eglLockMutex(_eglGlobal.Mutex);
-
- /* already preloaded */
- if (_eglGlobal.NumDrivers) {
- _eglUnlockMutex(_eglGlobal.Mutex);
- return EGL_TRUE;
- }
-
- loaded = _eglPreloadUserDriver();
-
- _eglUnlockMutex(_eglGlobal.Mutex);
-
- return loaded;
-}
-
-/**
- * Unload preloaded drivers.
- */
-void
-_eglUnloadDrivers(void)
-{
- EGLint i;
-
- /* this is called at atexit time */
- 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;
-}
-
-_EGLDriver *
-_eglLoadDefaultDriver(EGLDisplay dpy, EGLint *major, EGLint *minor)
-{
- _EGLDriver *drv = NULL;
- EGLBoolean ok;
- int i;
-
- _eglLockMutex(_eglGlobal.Mutex);
-
- for (i = 0; i < ARRAY_SIZE(DefaultDriverNames); i++) {
- _eglPreloadForEach(_eglGetSearchPath(),
- _eglLoaderFile, (void *) DefaultDriverNames[i]);
- if (_eglGlobal.NumDrivers == 0)
- continue;
- drv = _eglGlobal.Drivers[0];
-
- _eglUnlockMutex(_eglGlobal.Mutex);
- ok = drv->API.Initialize(drv, dpy, major, minor);
- _eglLockMutex(_eglGlobal.Mutex);
- if (ok)
- break;
-
- _eglUnloadDrivers();
- }
-
- _eglUnlockMutex(_eglGlobal.Mutex);
-
- return _eglGlobal.NumDrivers > 0 ? drv : 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 */
-}
-
-
-/**
- * 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);
+ return NULL;
}
projects / mesa.git / blobdiff