/*
* 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;
}