jdk/src/java.desktop/unix/native/common/awt/systemscale/systemScale.c
changeset 36869 f8ef78f4157d
child 39844 a3cc7e551a48
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/src/java.desktop/unix/native/common/awt/systemscale/systemScale.c	Fri Mar 11 11:00:38 2016 +0530
@@ -0,0 +1,52 @@
+/*
+* Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved.
+* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+*
+* This code is free software; you can redistribute it and/or modify it
+* under the terms of the GNU General Public License version 2 only, as
+* published by the Free Software Foundation.
+*
+* This code is distributed in the hope that it will be useful, but WITHOUT
+* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+* FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+* version 2 for more details (a copy is included in the LICENSE file that
+* accompanied this code).
+*
+* You should have received a copy of the GNU General Public License version
+* 2 along with this work; if not, write to the Free Software Foundation,
+* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+*
+* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+* or visit www.oracle.com if you need additional information or have any
+* questions.
+*/
+
+#include "systemScale.h"
+#include <stdlib.h>
+
+int getNativeScaleFactor() {
+
+    static int scale = -2.0;
+
+    if (scale == -2) {
+        scale = getScale("J2D_UISCALE");
+    }
+
+    if (scale >= 1) {
+        return (int) scale;
+    }
+    return getScale("GDK_SCALE");
+}
+
+int getScale(const char *name) {
+    char *uiScale = getenv(name);
+    if (uiScale != NULL) {
+        double scale = strtod(uiScale, NULL);
+        if (scale < 1) {
+            return -1;
+        }
+        return (int) scale;
+    }
+    return -1;
+}
+