egl: introduce a log level getter function

Being able to retrieve the log level can be useful to enable/disable
debug code. The alternative, which is calling 'getenv' function every
time to retrieve the log level, is more "expensive".

Signed-off-by: Silvestrs Timofejevs <silvestrs.timofejevs@imgtec.com>
Reviewed-by: Eric Engestrom <eric@engestrom.ch>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/13705>

src/egl/main/egllog.c

@@ -133,6 +133,15 @@ _eglInitLogger(void)
    }
 }
 
+/**
+ * Return the log level.
+ */
+EGLint
+_eglGetLogLevel(void)
+{
+   return logging.level;
+}
+
 
 /**
  * Log a message with message logger.

src/egl/main/egllog.h

@@ -44,6 +44,10 @@ extern "C" {
 #define _EGL_DEBUG   3   /* useful info for debugging */
 
 
+extern EGLint
+_eglGetLogLevel(void);
+
+
 extern void
 _eglLog(EGLint level, const char *fmtStr, ...);