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Attempted implementation of JNA based display scaling on windows.

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This commit is contained in:
Sam Pottinger
2019-12-02 20:21:07 -07:00
parent 22e90bffd2
commit f9df4ea6ea
1 changed files with 19 additions and 5 deletions
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app/src/processing/app/platform/WindowsPlatform.java
+19 -5
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@@ -22,6 +22,7 @@
package processing.app.platform;
import java.awt.*;
import java.io.File;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
@@ -29,9 +30,7 @@ import java.util.Optional;
import com.sun.jna.Library;
import com.sun.jna.Native;
import com.sun.jna.platform.win32.Shell32Util;
import com.sun.jna.platform.win32.ShlObj;
import com.sun.jna.platform.win32.GDI32;
import com.sun.jna.platform.win32.*;
import processing.app.Base;
import processing.app.Messages;
@@ -63,6 +62,10 @@ public class WindowsPlatform extends DefaultPlatform {
"\\" + APP_NAME.toLowerCase() + ".exe \"%1\"";
static final String REG_DOC = APP_NAME + ".Document";
private static final float RESOLUTION_AT_NO_SCALE = 96;
private static final int VERTRES = 10;
private static final int DESKTOPVERTRES = 117;
private Optional<Float> cachedDisplayScaling;
public WindowsPlatform() {
@@ -642,8 +645,19 @@ public class WindowsPlatform extends DefaultPlatform {
}
private float calculateSystemZoom() {
// TODO
return 1;
WinDef.HDC hdc = GDI32.INSTANCE.CreateCompatibleDC(null);
if (hdc == null) {
float resolution = Toolkit.getDefaultToolkit().getScreenResolution();
return resolution / RESOLUTION_AT_NO_SCALE;
}
float vertualResolution = GDI32.INSTANCE.GetDeviceCaps(hdc, VERTRES);
float logicalResolution = GDI32.INSTANCE.GetDeviceCaps(hdc, DESKTOPVERTRES);
GDI32.INSTANCE.DeleteDC(hdc);
return logicalResolution / vertualResolution;
}
}