egl: Rework driver loading.

Driver loading is now splitted into two stages.  In the first stage, an
_EGLModule is created for each driver: user driver, default drivers, and
all files in the search directories that start with "egl_".  Modules are
not loaded at this stage.

In the second stage, each module is loaded to initialize a display.  The
process stops at the first module that can initialize the display.

If eglGetProcAddress is called before eglInitialize, the same code path
will be taken to find the first module that supports
EGL_DEFAULT_DISPLAY.  Because we do not want to initialize the display,
drv->Probe is used instead in this case.

1 files changed, 8 insertions, 40 deletions

diff --git a/src/egl/main/eglapi.c b/src/egl/main/eglapi.c
index d51ffad410..89a75f9830 100644
--- a/src/egl/main/eglapi.c
+++ b/src/egl/main/eglapi.c
@@ -264,46 +264,24 @@ EGLBoolean EGLAPIENTRY
 eglInitialize(EGLDisplay dpy, EGLint *major, EGLint *minor)
 {
    _EGLDisplay *disp = _eglLockDisplay(dpy);
-   EGLint major_int = 0, minor_int = 0;
 
    if (!disp)
       RETURN_EGL_ERROR(NULL, EGL_BAD_DISPLAY, EGL_FALSE);
 
    if (!disp->Initialized) {
-      _EGLDriver *drv = disp->Driver;
-
-      if (!drv) {
-         _eglPreloadDrivers();
-         drv = _eglMatchDriver(disp);
-	 /* Initialize the particular display now */
-	 if (drv && !drv->API.Initialize(drv, disp, &major_int, &minor_int))
-	    RETURN_EGL_ERROR(disp, EGL_NOT_INITIALIZED, EGL_FALSE);
-      }
-      if (!drv)
-	 /* Load and initialize the first default driver that works */
-	 drv = _eglLoadDefaultDriver(disp, &major_int, &minor_int);
-      if (!drv)
-	 RETURN_EGL_ERROR(disp, EGL_NOT_INITIALIZED, EGL_FALSE);
-
-      disp->APImajor = major_int;
-      disp->APIminor = minor_int;
-      _eglsnprintf(disp->Version, sizeof(disp->Version),
-               "%d.%d (%s)", major_int, minor_int, drv->Name);
+      if (!_eglMatchDriver(disp, EGL_FALSE))
+         RETURN_EGL_ERROR(disp, EGL_NOT_INITIALIZED, EGL_FALSE);
 
+      _eglsnprintf(disp->Version, sizeof(disp->Version), "%d.%d (%s)",
+            disp->APImajor, disp->APIminor, disp->Driver->Name);
       /* limit to APIs supported by core */
       disp->ClientAPIsMask &= _EGL_API_ALL_BITS;
-
-      disp->Driver = drv;
-      disp->Initialized = EGL_TRUE;
-   } else {
-      major_int = disp->APImajor;
-      minor_int = disp->APIminor;
    }
 
    /* Update applications version of major and minor if not NULL */
    if ((major != NULL) && (minor != NULL)) {
-      *major = major_int;
-      *minor = minor_int;
+      *major = disp->APImajor;
+      *minor = disp->APIminor;
    }
 
    RETURN_EGL_SUCCESS(disp, EGL_TRUE);
@@ -870,18 +848,8 @@ eglGetProcAddress(const char *procname)
          }
       }
    }
-   if (ret)
-      RETURN_EGL_SUCCESS(NULL, ret);
-
-   _eglPreloadDrivers();
-
-   /* now loop over drivers to query their procs */
-   for (i = 0; i < _eglGlobal.NumDrivers; i++) {
-      _EGLDriver *drv = _eglGlobal.Drivers[i];
-      ret = drv->API.GetProcAddress(drv, procname);
-      if (ret)
-         break;
-   }
+   if (!ret)
+      ret = _eglGetDriverProc(procname);
 
    RETURN_EGL_SUCCESS(NULL, ret);
 }