Fix High DPI scaling on some Macs with Retina Display

Also: Print OS Name and Version to Console Log on app start

Author: retiutut

CHANGELOG.md

@@ -5,6 +5,7 @@
 * Revisit Ganglion Impedance widget so it behaves like new Cyton Impedance Widget #1021
 * Fix dropdown backgrounds in Networking Widget
 * Update priveleges for Windows users and check if GUI has been run as Administrator
+* Fix High DPI scaling on some Macs with Retina Display
 
 ### Improvements
 * Add new FilterUI to allow custom filters per channel #988
@@ -22,6 +23,7 @@
 * Fix certain Textfield and TextArea fonts not drawing correctly on some Macs
 * Update and enforce style guide throughout the GUI in preparation for multiple themes
 * Improve UI/UX for HelpWidget at the bottom of the GUI to make it more noticeable
+* Print OS Name and Version to Console Log on app start
 
 # v5.0.9
 

OpenBCI_GUI/Extras.pde

@@ -32,6 +32,41 @@ private boolean isMac() {
     return !isWindows() && !isLinux();
 }
 
+// For a full list of modern Mac OS versions, visit https://en.wikipedia.org/wiki/MacOS_version_history
+private boolean isMacOsLowerThanCatalina() {
+    int[] versionInfo = fetchAndParseMacOsVersion();
+    return versionInfo[0] <= 10 && versionInfo[1] < 15;
+}
+
+private boolean isMacOsBigSur() {
+    int[] versionInfo = fetchAndParseMacOsVersion();
+    return versionInfo[0] == 11;
+}
+
+private boolean isMacOsMonterey() {
+    int[] versionInfo = fetchAndParseMacOsVersion();
+    return versionInfo[0] == 12;
+}
+
+private String getOperatingSystemVersion() {
+    return System.getProperty("os.version");
+}
+
+private int[] fetchAndParseMacOsVersion() {
+    if (!isMac()) {
+        println("Oops! Please only call this method on MacOS");
+        return null;
+    }
+
+    final String version = getOperatingSystemVersion();
+    final String[] splitStrings = split(version, '.');
+    int[] versionVals = new int[splitStrings.length];
+    for (int i = 0; i < splitStrings.length; i++) {
+        versionVals[i] = Integer.valueOf(splitStrings[i]);
+    }
+    return versionVals;
+}
+
 //BrainFlow only supports Windows 8 and 10. This will help with OpenBCI support tickets. #964
 private void checkIsOldVersionOfWindowsOS() {
     boolean isOld = SystemUtils.IS_OS_WINDOWS_7 || SystemUtils.IS_OS_WINDOWS_VISTA || SystemUtils.IS_OS_WINDOWS_XP;

OpenBCI_GUI/OpenBCI_GUI.pde

@@ -337,8 +337,7 @@ void settings() {
     globalScreenResolution.append(" X ");
     globalScreenResolution.append(displayHeight);
     //Account for high-dpi displays on Mac, Windows, and Linux Machines Fixes #968
-    if (isMac())
-    //pixelDensity(displayDensity());
+    pixelDensity(displayDensity());
     globalScreenDPI = new StringBuilder("High-DPI Screen Detected: ");
     globalScreenDPI.append(displayDensity() == 2);
 }
@@ -350,7 +349,11 @@ void setup() {
 
     //V1 FONTS
     f1 = createFont("fonts/Raleway-SemiBold.otf", 16);
-    f2 = createFont("fonts/Raleway-Regular.otf", 15);
+    if (isMac() && isMacOsLowerThanCatalina() && (displayDensity() > 1)) {
+        f2 = createFont("fonts/Raleway-Regular.otf", 9);
+    } else {
+        f2 = createFont("fonts/Raleway-Regular.otf", 15);
+    }
     f3 = createFont("fonts/Raleway-SemiBold.otf", 15);
     f4 = createFont("fonts/Raleway-SemiBold.otf", 64);  // clear bigger fonts for widgets
 
@@ -391,7 +394,7 @@ void setup() {
     System.setOut(outputStream);
     System.setErr(outputStream);
 
-    StringBuilder osName = new StringBuilder("Operating System: ");
+    StringBuilder osName = new StringBuilder("Operating System and Version: ");
     if (isLinux()) {
         osName.append("Linux");
     } else if (isWindows()) {
@@ -404,6 +407,9 @@ void setup() {
         osName.append("Mac");
     }
 
+    osName.append(" - ");
+    osName.append(getOperatingSystemVersion());
+
     println("Console Log Started at Local Time: " + directoryManager.getFileNameDateTime());
     println(globalScreenResolution.toString());
     println(globalScreenDPI.toString());