USe SWTFontProvider in win32 GC fonts

This commit adapts how to fetch fonts in GC in the win32 implementation. Now it always uses the internal SWTFontProvider to fetch system and non-system fonts in the correct scaling.

Contributes to #62 and #131

Author: akoch-yatta

bundles/org.eclipse.swt/Eclipse SWT/win32/org/eclipse/swt/graphics/GC.java

@@ -4423,7 +4423,7 @@ public void setFillRule(int rule) {
 public void setFont (Font font) {
 	if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
 	if (font != null && font.isDisposed()) SWT.error(SWT.ERROR_INVALID_ARGUMENT);
-	data.font = font != null ? Font.win32_new(font, data.nativeZoom) : data.device.systemFont;
+	data.font = font != null ? SWTFontProvider.getFont(device, font.getFontData()[0], data.nativeZoom) : SWTFontProvider.getSystemFont(device, data.nativeZoom);
 	data.state &= ~FONT;
 }
 

bundles/org.eclipse.swt/Eclipse SWT/win32/org/eclipse/swt/internal/DefaultSWTFontRegistry.java

@@ -51,6 +51,7 @@ public Font getSystemFont(int zoom) {
 		if (hFont == 0) hFont = OS.GetStockObject (OS.SYSTEM_FONT);
 		Font font = Font.win32_new(device, hFont);
 		registerFont(KEY_SYSTEM_FONTS, font);
+		registerFont(font.getFontData()[0], font);
 		return font;
 	}