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Code Issues Releases Activity

Use Win10 API SetThreadDpiAwarenessContext to force DPI Awareness

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This commit contains debug messages used for testing purposes.
This commit is contained in:
Cristian Maglie 2016-11-10 16:14:25 +02:00
parent fceb1d7eda
commit 3957707218
1 changed files with 41 additions and 1 deletions
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42
arduino-core/src/processing/app/windows/Platform.java
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@ -36,6 +36,7 @@ import java.util.LinkedList;
import java.util.List;
import com.sun.jna.Native;
import com.sun.jna.Pointer;
import com.sun.jna.win32.StdCallLibrary;
import com.sun.jna.win32.W32APIOptions;
@ -250,15 +251,54 @@ public class Platform extends processing.app.Platform {
ExtUser32 INSTANCE = (ExtUser32) Native.loadLibrary("user32", ExtUser32.class, W32APIOptions.DEFAULT_OPTIONS);
public int GetDpiForSystem();
public int SetProcessDpiAwareness(int value);
public final int DPI_AWARENESS_INVALID = -1;
public final int DPI_AWARENESS_UNAWARE = 0;
public final int DPI_AWARENESS_SYSTEM_AWARE = 1;
public final int DPI_AWARENESS_PER_MONITOR_AWARE = 2;
public Pointer SetThreadDpiAwarenessContext(Pointer dpiContext);
public final Pointer DPI_AWARENESS_CONTEXT_UNAWARE = new Pointer(-1);
public final Pointer DPI_AWARENESS_CONTEXT_SYSTEM_AWARE = new Pointer(-2);
public final Pointer DPI_AWARENESS_CONTEXT_PER_MONITOR_AWARE = new Pointer(-3);
}
private static int detected = detectSystemDPI();
@Override
public int getSystemDPI() {
if (detected == -1)
return super.getSystemDPI();
return detected;
}
public static int detectSystemDPI() {
try {
int res = ExtUser32.INSTANCE.SetProcessDpiAwareness(ExtUser32.DPI_AWARENESS_SYSTEM_AWARE);
System.out.println("SetProcessDpiAwareness returned " + res);
} catch (Throwable e) {
System.out.println("SetProcessDpiAwareness failed!");
// Ignore error
}
try {
System.out.println("before any SetThreadDpiAwarenessContext(...) -> dpi " + ExtUser32.INSTANCE.GetDpiForSystem());
ExtUser32.INSTANCE.SetThreadDpiAwarenessContext(ExtUser32.DPI_AWARENESS_CONTEXT_UNAWARE);
System.out.println("SetThreadDpiAwarenessContext(UNAWARE) -> dpi " + ExtUser32.INSTANCE.GetDpiForSystem());
ExtUser32.INSTANCE.SetThreadDpiAwarenessContext(ExtUser32.DPI_AWARENESS_CONTEXT_SYSTEM_AWARE);
System.out.println("SetThreadDpiAwarenessContext(SYSTEM) -> dpi " + ExtUser32.INSTANCE.GetDpiForSystem());
} catch (Throwable e) {
System.out.println("SetThreadDpiAwarenessContext failed!");
// Ignore error (call valid only on Windows 10)
}
try {
return ExtUser32.INSTANCE.GetDpiForSystem();
} catch (Throwable e) {
// DPI detection failed, fall back with default
return super.getSystemDPI();
System.out.println("DPI detection failed, fallback to 96 dpi");
return -1;
}
}
}