X-Git-Url: https://git.libre-soc.org/?a=blobdiff_plain;f=src%2Fegl%2Fmain%2Fegldriver.c;h=6384242b093a7a289313b4154dea54c115723726;hb=64644ec3b21884d4a974fa29087fa98c4ed9e112;hp=018b06d3bea77022566413aa47e14fef8f6441f0;hpb=3d36d6b4cf735e93a6ae5eadf28e671252fb5303;p=mesa.git

diff --git a/src/egl/main/egldriver.c b/src/egl/main/egldriver.c
index 018b06d3bea..6384242b093 100644
--- a/src/egl/main/egldriver.c
+++ b/src/egl/main/egldriver.c
@@ -19,9 +19,13 @@
 #include "eglscreen.h"
 #include "eglstring.h"
 #include "eglsurface.h"
+#include "eglimage.h"
 
-#if defined(_EGL_PLATFORM_X)
+#if defined(_EGL_PLATFORM_POSIX)
 #include <dlfcn.h>
+#include <sys/types.h>
+#include <dirent.h>
+#include <unistd.h>
 #endif
 
 
@@ -49,10 +53,17 @@ close_library(HMODULE lib)
 }
 
 
-#elif defined(_EGL_PLATFORM_X)
+static const char *
+library_suffix(void)
+{
+   return ".dll";
+}
+
 
+#elif defined(_EGL_PLATFORM_POSIX)
 
-static const char DefaultDriverName[] = "egl_softpipe";
+
+static const char DefaultDriverName[] = "egl_glx";
 
 typedef void * lib_handle;
 
@@ -68,8 +79,17 @@ close_library(void *lib)
    dlclose(lib);
 }
 
+
+static const char *
+library_suffix(void)
+{
+   return ".so";
+}
+
+
 #else /* _EGL_PLATFORM_NO_OS */
 
+
 static const char DefaultDriverName[] = "builtin";
 
 typedef void *lib_handle;
@@ -86,67 +106,21 @@ close_library(void *lib)
 }
 
 
-#endif
+static const char *
+library_suffix(void)
+{
+   return NULL;
+}
 
 
-/**
- * Choose a driver for a given display.
- * The caller may free() the returned strings.
- */
-static char *
-_eglChooseDriver(_EGLDisplay *dpy, char **argsRet)
-{
-   char *path = NULL;
-   const char *args = NULL;
-   const char *suffix = NULL;
-   const char *p;
-
-   path = getenv("EGL_DRIVER");
-   if (path)
-      path = _eglstrdup(path);
-
-#if defined(_EGL_PLATFORM_X)
-   if (!path && dpy && dpy->NativeDisplay) {
-      /* assume (wrongly!) that the native display is a display string */
-      path = _eglSplitDisplayString((const char *) dpy->NativeDisplay, &args);
-   }
-   suffix = "so";
-#elif defined(_EGL_PLATFORM_WINDOWS)
-   suffix = "dll";
-#else /* _EGL_PLATFORM_NO_OS */
-   if (path) {
-      /* force the use of the default driver */
-      _eglLog(_EGL_DEBUG, "ignore EGL_DRIVER");
-      free(path);
-      path = NULL;
-   }
-   suffix = NULL;
 #endif
 
-   if (!path)
-      path = _eglstrdup(DefaultDriverName);
-
-   /* 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);
-
-         free(path);
-         path = tmp;
-      }
-   }
-
-   if (argsRet)
-      *argsRet = (args) ? _eglstrdup(args) : NULL;
 
-   return path;
-}
+#define NUM_PROBE_CACHE_SLOTS 8
+static struct {
+   EGLint keys[NUM_PROBE_CACHE_SLOTS];
+   const void *values[NUM_PROBE_CACHE_SLOTS];
+} _eglProbeCache;
 
 
 /**
@@ -168,9 +142,15 @@ _eglOpenLibrary(const char *driverPath, lib_handle *handle)
    /* XXX untested */
    if (lib)
       mainFunc = (_EGLMain_t) GetProcAddress(lib, "_eglMain");
-#elif defined(_EGL_PLATFORM_X)
+#elif defined(_EGL_PLATFORM_POSIX)
    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();
    }
@@ -208,11 +188,10 @@ _eglOpenLibrary(const char *driverPath, lib_handle *handle)
 
 
 /**
- * Load the named driver.  The path and args passed will be
- * owned by the driver and freed.
+ * Load the named driver.
  */
 static _EGLDriver *
-_eglLoadDriver(char *path, char *args)
+_eglLoadDriver(const char *path, const char *args)
 {
    _EGLMain_t mainFunc;
    lib_handle lib;
@@ -234,8 +213,19 @@ _eglLoadDriver(char *path, char *args)
       drv->Name = "UNNAMED";
    }
 
-   drv->Path = path;
-   drv->Args = args;
+   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;
@@ -244,89 +234,327 @@ _eglLoadDriver(char *path, char *args)
 
 /**
  * Match a display to a preloaded driver.
+ *
+ * The matching is done by finding the driver with the highest score.
  */
-static _EGLDriver *
+_EGLDriver *
 _eglMatchDriver(_EGLDisplay *dpy)
 {
-   _EGLDriver *defaultDriver = NULL;
-   EGLint i;
+   _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);
+         }
+
+         best_drv = drv;
+         best_score = score;
+         /* perfect match */
+         if (score >= 100)
+            break;
+      }
+   }
+
+   return best_drv;
+}
+
 
-      /* display specifies a driver */
-      if (dpy->DriverName) {
-         if (strcmp(dpy->DriverName, drv->Name) == 0)
-            return drv;
+/**
+ * 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)
+{
+   _EGLDriver *drv;
+   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';
+
+   drv = _eglLoadDriver(path, NULL);
+   /* fix the path and load again */
+   if (!drv && 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 && len + slen + 1 <= sizeof(path)) {
+         strcpy(path + len, suffix);
+         drv = _eglLoadDriver(path, NULL);
       }
-      else if (drv->Probe) {
-         if (drv->Probe(drv, dpy))
-            return drv;
+   }
+   if (!drv)
+      return EGL_TRUE;
+
+   /* remember the driver and stop */
+   _eglGlobal.Drivers[_eglGlobal.NumDrivers++] = drv;
+   return EGL_FALSE;
+}
+
+
+/**
+ * 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_PLATFORM_POSIX)
+   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))) {
+      _EGLDriver *drv;
+      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;
       }
-      else {
-         if (!defaultDriver)
-            defaultDriver = drv;
+
+      /* make a full path and load the driver */
+      if (len + dirent_len + 1 <= sizeof(path)) {
+         strcpy(path + len, dirent->d_name);
+         drv = _eglLoadDriver(path, NULL);
+         if (drv)
+            _eglGlobal.Drivers[_eglGlobal.NumDrivers++] = drv;
       }
    }
 
-   return defaultDriver;
+   closedir(dirp);
+
+   return EGL_TRUE;
+#else /* _EGL_PLATFORM_POSIX */
+   /* stop immediately */
+   return EGL_FALSE;
+#endif
 }
 
 
 /**
- * Load a driver and save it.
+ * 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.
  */
-const char *
-_eglPreloadDriver(_EGLDisplay *dpy)
+static EGLint
+_eglPreloadForEach(const char *search_path,
+                   EGLBoolean (*loader)(const char *, size_t, void *),
+                   void *loader_data)
 {
-   char *path, *args;
-   _EGLDriver *drv;
-   EGLint i;
+   const char *cur, *next;
+   size_t len;
+   EGLint num_drivers = _eglGlobal.NumDrivers;
 
-   path = _eglChooseDriver(dpy, &args);
-   if (!path)
-      return NULL;
+   cur = search_path;
+   while (cur) {
+      next = strchr(cur, ':');
+      len = (next) ? next - cur : strlen(cur);
 
-   for (i = 0; i < _eglGlobal.NumDrivers; i++) {
-      drv = _eglGlobal.Drivers[i];
-      if (strcmp(drv->Path, path) == 0) {
-         _eglLog(_EGL_DEBUG, "Driver %s is already preloaded",
-                 drv->Name);
-         free(path);
-         if (args)
-            free(args);
-         return drv->Name;
+      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_PLATFORM_POSIX) || defined(_EGL_PLATFORM_WINDOWS)
+   if (!search_path) {
+      static char buffer[1024];
+      const char *p;
+      int ret;
+
+      p = getenv("EGL_DRIVERS_PATH");
+#if defined(_EGL_PLATFORM_POSIX)
+      if (p && (geteuid() != getuid() || getegid() != getgid())) {
+         _eglLog(_EGL_DEBUG,
+               "ignore EGL_DRIVERS_PATH for setuid/setgid binaries");
+         p = NULL;
+      }
+#endif /* _EGL_PLATFORM_POSIX */
+
+      if (p) {
+         ret = snprintf(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
 
-   drv = _eglLoadDriver(path, args);
-   if (!drv)
-      return NULL;
+   return search_path;
+}
 
-   _eglGlobal.Drivers[_eglGlobal.NumDrivers++] = drv;
 
-   return drv->Name;
+/**
+ * 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_PLATFORM_POSIX)
+   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_PLATFORM_POSIX */
+   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;
 }
 
 
 /**
- * Open a preloaded driver.
+ * 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.
+ *
+ * FIXME This makes libEGL a memory hog if an user driver is not specified and
+ * there are many display drivers.
  */
-_EGLDriver *
-_eglOpenDriver(_EGLDisplay *dpy)
+static EGLBoolean
+_eglPreloadDisplayDrivers(void)
 {
-   _EGLDriver *drv = _eglMatchDriver(dpy);
-   return drv;
+   const char *dpy;
+   char prefix[32];
+   int ret;
+
+   dpy = getenv("EGL_DISPLAY");
+   if (!dpy || !dpy[0])
+      dpy = _EGL_DEFAULT_DISPLAY;
+   if (!dpy || !dpy[0])
+      return EGL_FALSE;
+
+   ret = snprintf(prefix, sizeof(prefix), "egl_%s_", dpy);
+   if (ret < 0 || ret >= sizeof(prefix))
+      return EGL_FALSE;
+
+   return (_eglPreloadForEach(_eglGetSearchPath(),
+            _eglLoaderPattern, (void *) prefix) > 0);
+}
+
+
+/**
+ * Preload the default driver.
+ */
+static EGLBoolean
+_eglPreloadDefaultDriver(void)
+{
+   return (_eglPreloadForEach(_eglGetSearchPath(),
+            _eglLoaderFile, (void *) DefaultDriverName) > 0);
 }
 
 
 /**
- * Close a preloaded driver.
+ * Preload drivers.
+ *
+ * This function loads the driver modules and creates the corresponding
+ * _EGLDriver objects.
  */
 EGLBoolean
-_eglCloseDriver(_EGLDriver *drv, _EGLDisplay *dpy)
+_eglPreloadDrivers(void)
 {
-   return EGL_TRUE;
+   EGLBoolean loaded;
+
+   /* protect the preloading process */
+   _eglLockMutex(_eglGlobal.Mutex);
+
+   /* already preloaded */
+   if (_eglGlobal.NumDrivers) {
+      _eglUnlockMutex(_eglGlobal.Mutex);
+      return EGL_TRUE;
+   }
+
+   loaded = (_eglPreloadUserDriver() ||
+             _eglPreloadDisplayDrivers() ||
+             _eglPreloadDefaultDriver());
+
+   _eglUnlockMutex(_eglGlobal.Mutex);
+
+   return loaded;
 }
 
 
@@ -337,6 +565,8 @@ 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;
@@ -359,20 +589,6 @@ _eglUnloadDrivers(void)
 }
 
 
-/**
- * Given a display handle, return the _EGLDriver for that display.
- */
-_EGLDriver *
-_eglLookupDriver(EGLDisplay dpy)
-{
-   _EGLDisplay *d = _eglLookupDisplay(dpy);
-   if (d)
-      return d->Driver;
-   else
-      return NULL;
-}
-
-
 /**
  * Plug all the available fallback routines into the given driver's
  * dispatch table.
@@ -428,56 +644,50 @@ _eglInitDriverFallbacks(_EGLDriver *drv)
 #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 */
+}
 
 
 /**
- * Try to determine which EGL APIs (OpenGL, OpenGL ES, OpenVG, etc)
- * are supported on the system by looking for standard library names.
+ * 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.
  */
-EGLint
-_eglFindAPIs(void)
+void
+_eglSetProbeCache(EGLint key, const void *val)
 {
-   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_X)
-   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
+   EGLint idx;
 
-   if ((lib = open_library(es1_libname))) {
-      close_library(lib);
-      mask |= EGL_OPENGL_ES_BIT;
+   for (idx = 0; idx < NUM_PROBE_CACHE_SLOTS; idx++) {
+      if (!_eglProbeCache.keys[idx] || _eglProbeCache.keys[idx] == key)
+         break;
    }
+   assert(key > 0);
+   assert(idx < NUM_PROBE_CACHE_SLOTS);
 
-   if ((lib = open_library(es2_libname))) {
-      close_library(lib);
-      mask |= EGL_OPENGL_ES2_BIT;
-   }
+   _eglProbeCache.keys[idx] = key;
+   _eglProbeCache.values[idx] = val;
+}
 
-   if ((lib = open_library(gl_libname))) {
-      close_library(lib);
-      mask |= EGL_OPENGL_BIT;
-   }
 
-   if ((lib = open_library(vg_libname))) {
-      close_library(lib);
-      mask |= EGL_OPENVG_BIT;
+/**
+ * Return the probe cache at the given key.
+ */
+const void *
+_eglGetProbeCache(EGLint key)
+{
+   EGLint idx;
+
+   for (idx = 0; idx < NUM_PROBE_CACHE_SLOTS; idx++) {
+      if (!_eglProbeCache.keys[idx] || _eglProbeCache.keys[idx] == key)
+         break;
    }
 
-   return mask;
+   return (idx < NUM_PROBE_CACHE_SLOTS && _eglProbeCache.keys[idx] == key) ?
+      _eglProbeCache.values[idx] : NULL;
 }