Removal for OS.LOGPIXELS* in FontDialog #62

This commit removes the usage of OS.LOGPIXELS* in FontDialog. These values can be obtained using other means as the OS.LOGPIXELS provides the dpi values of the primary monitor at the app-startup time. It's usage has been replaced by passing the zoom directly in FontDialog::open method.

contributes to
#62 and
#127

Author: amartya4256

bundles/org.eclipse.swt/Eclipse SWT/win32/org/eclipse/swt/widgets/FontDialog.java

@@ -16,6 +16,7 @@
 
 import org.eclipse.swt.*;
 import org.eclipse.swt.graphics.*;
+import org.eclipse.swt.internal.*;
 import org.eclipse.swt.internal.win32.*;
 
 /**
@@ -195,14 +196,13 @@ public FontData open () {
 	if (effectsVisible) {
 		lpcf.Flags |= OS.CF_EFFECTS;
 	}
+	int dpi = DPIUtil.mapZoomToDPI(getParent().nativeZoom);
 
 	long lpLogFont = OS.HeapAlloc (hHeap, OS.HEAP_ZERO_MEMORY, LOGFONT.sizeof);
 	if (fontData != null && fontData.data != null) {
 		LOGFONT logFont = fontData.data;
 		int lfHeight = logFont.lfHeight;
-		long hDC = OS.GetDC (0);
-		int pixels = -(int)(0.5f + (fontData.height * OS.GetDeviceCaps(hDC, OS.LOGPIXELSY) / 72));
-		OS.ReleaseDC (0, hDC);
+		int pixels = -(int)(0.5f + (fontData.height * dpi / 72));
 		logFont.lfHeight = pixels;
 		lpcf.Flags |= OS.CF_INITTOLOGFONTSTRUCT;
 		OS.MoveMemory (lpLogFont, logFont, LOGFONT.sizeof);
@@ -257,7 +257,7 @@ public FontData open () {
 			 * proper device.
 			 */
 			long hDC = OS.GetDC(0);
-			int logPixelsY = OS.GetDeviceCaps(hDC, OS.LOGPIXELSY);
+			int logPixelsY = dpi;
 			int pixels = 0;
 			if (logFont.lfHeight > 0) {
 				/*