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 #include "systemScale.h"
  24 #include <d2d1.h>
  25 #pragma comment(lib, "d2d1")
  26 #include <jdk_util.h>
  27 #ifndef MDT_EFFECTIVE_DPI
  28 #define MDT_EFFECTIVE_DPI 0
  29 #endif
  30 
  31 void GetScreenDpi(HMONITOR hmon, float *dpiX, float *dpiY)
  32 {
  33     unsigned x = 0;
  34     unsigned y = 0;
  35 
  36     // for debug purposes
  37     static float scale = -2.0f;
  38     if (scale == -2) {
  39         scale = -1;
  40         char *uiScale = getenv("J2D_UISCALE");
  41         if (uiScale != NULL) {
  42             scale = (float)strtod(uiScale, NULL);

   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.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 #include "systemScale.h"
  26 #include <d2d1.h>
  27 #pragma comment(lib, "d2d1")
  28 #include <jdk_util.h>
  29 #ifndef MDT_EFFECTIVE_DPI
  30 #define MDT_EFFECTIVE_DPI 0
  31 #endif
  32 
  33 void GetScreenDpi(HMONITOR hmon, float *dpiX, float *dpiY)
  34 {
  35     unsigned x = 0;
  36     unsigned y = 0;
  37 
  38     // for debug purposes
  39     static float scale = -2.0f;
  40     if (scale == -2) {
  41         scale = -1;
  42         char *uiScale = getenv("J2D_UISCALE");
  43         if (uiScale != NULL) {
  44             scale = (float)strtod(uiScale, NULL);