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 <[email protected]>

1 files changed, 30 insertions, 0 deletions

diff --git a/src/egl/main/egldisplay.c b/src/egl/main/egldisplay.c
index 9b4227f5458..2c271efd670 100644
--- a/src/egl/main/egldisplay.c
+++ b/src/egl/main/egldisplay.c
@@ -40,6 +40,36 @@ _eglFiniDisplay(void)
 
 
 /**
+ * If the first character is '!' we interpret it as specific driver name
+ * (i.e. "!r200" or "!i830").  Whatever follows ':' is interpreted as
+ * arguments.
+ *
+ * The caller may free() the returned driver name.
+ */
+char *
+_eglSplitDisplayString(const char *dpyString, const char **args)
+{
+   char *drv, *p;
+
+   if (!dpyString || dpyString[0] != '!')
+      return NULL;
+   drv = _eglstrdup(dpyString + 1);
+   if (!drv)
+      return NULL;
+
+   p = strchr(dpyString, ':');
+   if (p) {
+      drv[p - dpyString] = '\0';
+      p++;
+   }
+   if (args)
+      *args = p;
+
+   return drv;
+}
+
+
+/**
  * Allocate a new _EGLDisplay object for the given nativeDisplay handle.
  * We'll also try to determine the device driver name at this time.
  *