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