1 /*

     2 * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved.

     3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4 *

     5 * This code is free software; you can redistribute it and/or modify it

     6 * under the terms of the GNU General Public License version 2 only, as

     7 * published by the Free Software Foundation.

     8 *

     9 * This code is distributed in the hope that it will be useful, but WITHOUT

    10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    11 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    12 * version 2 for more details (a copy is included in the LICENSE file that

    13 * accompanied this code).

    14 *

    15 * You should have received a copy of the GNU General Public License version

    16 * 2 along with this work; if not, write to the Free Software Foundation,

    17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    18 *

    19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    20 * or visit www.oracle.com if you need additional information or have any

    21 * questions.

    22 */

    23 

    24 #include "systemScale.h"

    25 #include <stdlib.h>

    26 

    27 int getNativeScaleFactor() {

    28 

    29     static int scale = -2.0;

    30 

    31     if (scale == -2) {

    32         scale = getScale("J2D_UISCALE");

    33     }

    34 

    35     if (scale >= 1) {

    36         return (int) scale;

    37     }

    38     return getScale("GDK_SCALE");

    39 }

    40 

    41 int getScale(const char *name) {

    42     char *uiScale = getenv(name);

    43     if (uiScale != NULL) {

    44         double scale = strtod(uiScale, NULL);

    45         if (scale < 1) {

    46             return -1;

    47         }

    48         return (int) scale;

    49     }

    50     return -1;

    51 }

    52