From 7a1dbd0d87a15f582f568a20adbbe42505bdca33 Mon Sep 17 00:00:00 2001
From: Sven Gothel <sgothel@jausoft.com>
Date: Sat, 1 Mar 2014 12:27:59 +0100
Subject: NEWT MonitorDevice: Add convenient getPixelsPerMM(..) method to
 retrieve the pixels-per-millimeter (Requires manual Conversion to dpi)

---
 .../classes/com/jogamp/newt/MonitorDevice.java     | 28 +++++++++++++++++++++-
 1 file changed, 27 insertions(+), 1 deletion(-)

(limited to 'src/newt/classes/com')

diff --git a/src/newt/classes/com/jogamp/newt/MonitorDevice.java b/src/newt/classes/com/jogamp/newt/MonitorDevice.java
index 28d9f53a1..2d1d912c7 100644
--- a/src/newt/classes/com/jogamp/newt/MonitorDevice.java
+++ b/src/newt/classes/com/jogamp/newt/MonitorDevice.java
@@ -33,7 +33,7 @@ import java.util.List;
 import javax.media.nativewindow.util.DimensionImmutable;
 import javax.media.nativewindow.util.Rectangle;
 import javax.media.nativewindow.util.RectangleImmutable;
-
+import javax.media.nativewindow.util.SurfaceSize;
 import com.jogamp.common.util.ArrayHashSet;
 
 /**
@@ -118,6 +118,32 @@ public abstract class MonitorDevice {
         return sizeMM;
     }
 
+    /**
+     * Stores the <i>pixels per millimeter</i> value according to <i>current</i> {@link MonitorMode}
+     * {@link SurfaceSize#getResolution() SurfaceSize's resolution} in the given storage <code>ppmmStore</code>.
+     * <p>
+     * To convert the result to <i>dpi</i>, i.e. dots-per-inch, multiply both components with <code>25.4f</code>.
+     * </p>
+     */
+    public final void getPixelsPerMM(final float[] ppmmStore) {
+        final MonitorMode mode = getCurrentMode();
+        getPixelsPerMM(mode, ppmmStore);
+    }
+
+    /**
+     * Stores the <i>pixels per millimeter</i> value according to the given {@link MonitorMode}
+     * {@link SurfaceSize#getResolution() SurfaceSize's resolution} in the given storage <code>ppmmStore</code>.
+     * <p>
+     * To convert the result to <i>dpi</i>, i.e. dots-per-inch, multiply both components with <code>25.4f</code>.
+     * </p>
+     */
+    public final void getPixelsPerMM(final MonitorMode mode, final float[] ppmmStore) {
+        final DimensionImmutable sdim = getSizeMM();
+        final DimensionImmutable spix = mode.getSurfaceSize().getResolution();
+        ppmmStore[0] = (float)spix.getWidth() / (float)sdim.getWidth();
+        ppmmStore[1] = (float)spix.getHeight() / (float)sdim.getHeight();
+    }
+
     /**
      * Returns the immutable original {@link com.jogamp.newt.MonitorMode}, as used at NEWT initialization.
      * <p>
-- 
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