From 5a459d58fca2b71cb77c39f98df8a81ce6298421 Mon Sep 17 00:00:00 2001
From: Chia-I Wu <olvaffe@gmail.com>
Date: Fri, 21 Aug 2009 13:53:36 +0800
Subject: egl: Remove dependency on libX11.

libX11 is used to determine the screen number, which is in turned used
to determine the DRI driver.  However, the sysfs interface for
determining the DRI driver is gone, and no working driver depends on
this mechanism.

Display string parsing is moved to a new function,
_eglSplitDisplayString.

Signed-off-by: Chia-I Wu <olvaffe@gmail.com>
---
 src/egl/main/egldriver.c | 91 ++++--------------------------------------------
 1 file changed, 7 insertions(+), 84 deletions(-)

(limited to 'src/egl/main/egldriver.c')

diff --git a/src/egl/main/egldriver.c b/src/egl/main/egldriver.c
index a252a9aabb9..06e10f61894 100644
--- a/src/egl/main/egldriver.c
+++ b/src/egl/main/egldriver.c
@@ -22,7 +22,6 @@
 
 #if defined(_EGL_PLATFORM_X)
 #include <dlfcn.h>
-#include "eglx.h"
 #elif defined(_EGL_PLATFORM_WINDOWS)
 /* Use static linking on Windows for now */
 #define WINDOWS_STATIC_LINK
@@ -38,7 +37,6 @@
    /* XXX Need to decide how to do dynamic name lookup on Windows */
    static const char *DefaultDriverName = "TBD";
 #endif
-   static const char *SysFS = NULL;
    typedef HMODULE lib_handle;
 
    static HMODULE
@@ -61,8 +59,7 @@
    }
 
 #elif defined(_EGL_PLATFORM_X)
-   static const char *DefaultDriverName = ":0";
-   static const char *SysFS = "/sys/class";
+   static const char *DefaultDriverName = "egl_softpipe";
 
    typedef void * lib_handle;
 
@@ -80,57 +77,9 @@
    
 #endif
 
-/**
- * Given a card number, use sysfs to determine the DRI driver name.
- */
-const char *
-_eglChooseDRMDriver(int card)
-{
-#if 0
-   return _eglstrdup("libEGLdri");
-#else
-   char path[2000], driverName[2000];
-   FILE *f;
-   int length;
-
-   snprintf(path, sizeof(path), "%s/drm/card%d/dri_library_name", SysFS, card);
-
-   f = fopen(path, "r");
-   if (!f)
-      return NULL;
-
-   fgets(driverName, sizeof(driverName), f);
-   fclose(f);
-
-   if ((length = strlen(driverName)) > 1) {
-      /* remove the trailing newline from sysfs */
-      driverName[length - 1] = '\0';
-      strncat(driverName, "_dri", sizeof(driverName));
-      return _eglstrdup(driverName);
-   }
-   else {
-      return NULL;
-   }   
-#endif
-}
-
 
 /**
- * XXX this function is totally subject change!!!
- *
- *
- * Determine/return the path of the driver to use for the given native display.
- *
- * Try to be clever and determine if nativeDisplay is an Xlib Display
- * ptr or a string (naming a driver or screen number, etc).
- *
- * If the first character is ':' we interpret it as a screen or card index
- * number (i.e. ":0" or ":1", etc)
- * Else if the first character is '!' we interpret it as specific driver name
- * (i.e. "!r200" or "!i830".
- *
- * Whatever follows ':' is interpreted as arguments.
- *
+ * Choose a driver for a given display.
  * The caller may free() the returned strings.
  */
 static char *
@@ -144,42 +93,16 @@ _eglChooseDriver(_EGLDisplay *dpy, char **argsRet)
       path = _eglstrdup(path);
 
 #if defined(_EGL_PLATFORM_X)
-   (void) DefaultDriverName;
-
    if (!path && dpy->NativeDisplay) {
-      const char *dpyString = (const char *) dpy->NativeDisplay;
-      char *p;
-      /* parse the display string */
-      if (dpyString[0] == '!' || dpyString[0] == ':') {
-         if (dpyString[0] == '!') {
-            path = _eglstrdup(dpyString);
-            p = strchr(path, ':');
-            if (p)
-               *p++ = '\0';
-         } else {
-            p = strchr(dpyString, ':');
-            if (p)
-               p++;
-         }
-
-         if (p) {
-            if (!path && p[0] >= '0' && p[0] <= '9' && !p[1]) {
-               int card = atoi(p);
-               path = (char *) _eglChooseDRMDriver(card);
-            }
-            args = p;
-         }
-      }
-      else {
-         path = (char *) _xeglChooseDriver(dpy);
-      }
+      /* assume (wrongly!) that the native display is a display string */
+      path = _eglSplitDisplayString((const char *) dpy->NativeDisplay, &args);
    }
-#elif defined(_EGL_PLATFORM_WINDOWS)
+#endif /* _EGL_PLATFORM_X */
+
    if (!path)
       path = _eglstrdup(DefaultDriverName);
-#endif /* _EGL_PLATFORM_X */
 
-   if (path && argsRet)
+   if (argsRet)
       *argsRet = (args) ? _eglstrdup(args) : NULL;
 
    return path;
-- 
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