- isAMac = System.getProperty("os.name").indexOf("Mac") > -1;
- isLinux = System.getProperty("os.name").toLowerCase()
- .indexOf("linux") > -1;
- isWindows = System.getProperty("os.name").toLowerCase()
- .indexOf("windows") > -1;
- dpi = Toolkit.getDefaultToolkit().getScreenResolution();
- scale = dpi / hidpi + 1;
- String forceHiDPISettingProperty = System
- .getProperty(forceHiDPISettingPropertyName);
- forceHiDPISetting = forceHiDPISettingProperty != null
- && forceHiDPISettingProperty.equalsIgnoreCase("true");
- if (doCondition())
+ String system = System.getProperty("os.name") == null ? null
+ : System.getProperty("os.name").toLowerCase();
+ if (system != null)
+ {
+ isLinux = system.indexOf("linux") > -1;
+ // isAMac = system.indexOf("mac") > -1;
+ // isWindows = system.indexOf("windows") > -1;
+ }
+ else
+ {
+ isLinux = false;
+ // isAMac = isWindows = false;
+ }
+ }
+
+ private static void init()
+ {
+ if (doneInit)
+ {
+ return;
+ }
+
+ // get and use command line property values first
+ String setHiDPIProperty = System.getProperty(setHiDPIPropertyName);
+ setHiDPI = setHiDPIProperty != null
+ && setHiDPIProperty.equalsIgnoreCase("true");
+
+ String setHiDPIScaleProperty = System
+ .getProperty(setHiDPIScalePropertyName);
+ if (setHiDPIScaleProperty != null)
+ {
+ try
+ {
+ setHiDPIScale = Integer.parseInt(setHiDPIScaleProperty);
+ } catch (NumberFormatException e)
+ {
+ System.err.println(setHiDPIScalePropertyName + " property give ("
+ + setHiDPIScaleProperty + ") but not parseable as integer");
+ }
+ }
+ if (setHiDPI && setHiDPIScale > 0)
+ {
+ setHiDPIScale(setHiDPIScale);
+ return;
+ }
+
+ // check to see if the scale property has already been set by something else
+ // (e.g. the OS)
+ String existingProperty = System.getProperty(scalePropertyName);
+ if (existingProperty != null)
+ {
+ try
+ {
+ int existingPropertyVal = Integer.parseInt(existingProperty);
+ System.out.println("Existing " + scalePropertyName + " is "
+ + existingPropertyVal);
+ if (existingPropertyVal > 1)
+ {
+ setHiDPIScale(existingPropertyVal);
+ return;
+ }
+ } catch (NumberFormatException e)
+ {
+ System.out.println("Could not convert property " + scalePropertyName
+ + " vale '" + existingProperty + "' to number");
+ }
+ }
+
+ // Try and auto guess a good scale based on reported DPI (not trustworthy)
+ // and screen resolution (more trustworthy)
+
+ // get screen dpi
+ screenInfo = getScreenInfo();
+ try
+ {
+ dpi = screenInfo.getScreenResolution();
+ } catch (HeadlessException e)
+ {
+ System.err.println("Cannot get screen resolution: " + e.getMessage());
+ }
+
+ // try and get screen size height and width
+ try
+ {
+ int height = screenInfo.getScreenHeight();
+ int width = screenInfo.getScreenWidth();
+ // using mindimension in case of portrait screens
+ mindimension = Math.min(height, width);
+ } catch (HeadlessException e)
+ {
+ System.err.println(
+ "Cannot get screen size height and width:" + e.getMessage());
+ }
+
+ // attempt at a formula for scaling based on screen dpi and mindimension.
+ // scale will be an integer >=1. This formula is based on some testing and
+ // guesswork!
+
+ // scale based on reported dpi. if dpi>hidpiThreshold then scale=2+multiples
+ // of hidpiMultiThreshold (else scale=1)
+ // (e.g. dpi of 110 scales 1. dpi of 120 scales 2. dpi of 360 scales 3)
+ int dpiScale = (dpi - hidpiThreshold > 0)
+ ? 2 + ((dpi - hidpiThreshold) / hidpiMultiThreshold)
+ : 1;
+
+ int dimensionScale = 1 + (mindimension / bigScreenThreshold);
+
+ // choose larger of dimensionScale or dpiScale (most likely dimensionScale
+ // as dpiScale often misreported)
+ int autoScale = Math.max(dpiScale, dimensionScale);
+
+ // only make an automatic change if scale is changed and other conditions
+ // (OS is linux) apply, or if setHiDPI has been specified
+ if ((autoScale > 1 && isLinux) || setHiDPI)