[Polycasso-commit] SF.net SVN: polycasso:[26] trunk/polycasso/src/com/mebigfatguy/polycasso/ Feedback.java

[<dbr...@us...>]

Revision: 26
          http://polycasso.svn.sourceforge.net/polycasso/?rev=26&view=rev
Author:   dbrosius
Date:     2009-11-24 05:09:39 +0000 (Tue, 24 Nov 2009)

Log Message:
-----------
separate out feedback into it's own class

Added Paths:
-----------
    trunk/polycasso/src/com/mebigfatguy/polycasso/Feedback.java

Added: trunk/polycasso/src/com/mebigfatguy/polycasso/Feedback.java
===================================================================
--- trunk/polycasso/src/com/mebigfatguy/polycasso/Feedback.java	                        (rev 0)
+++ trunk/polycasso/src/com/mebigfatguy/polycasso/Feedback.java	2009-11-24 05:09:39 UTC (rev 26)
@@ -0,0 +1,67 @@
+/*
+ * polycasso - Cubism Artwork generator
+ * Copyright 2009 MeBigFatGuy.com
+ * Copyright 2009 Dave Brosius
+ * Inspired by work by Roger Alsing
+ * 
+ * Licensed under the Apache License, Version 2.0 (the "License"); 
+ * you may not use this file except in compliance with the License. 
+ * You may obtain a copy of the License at 
+ * 
+ *    http://www.apache.org/licenses/LICENSE-2.0 
+ *    
+ * Unless required by applicable law or agreed to in writing, 
+ * software distributed under the License is distributed on an "AS IS" BASIS, 
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 
+ * See the License for the specific language governing permissions and limitations 
+ * under the License. 
+ */
+package com.mebigfatguy.polycasso;
+
+import java.awt.image.BufferedImage;
+import java.awt.image.DataBufferByte;
+import java.awt.image.WritableRaster;
+
+public class Feedback {
+
+	private byte[] targetBuffer;
+	private int size;
+	
+	public Feedback(BufferedImage targetImage) {
+		WritableRaster raster = targetImage.getRaster();
+		DataBufferByte dbb = (DataBufferByte)raster.getDataBuffer();
+		targetBuffer = dbb.getData();
+		size = dbb.getSize();
+	}
+	
+	public double calculateDelta(BufferedImage testImage) {
+		WritableRaster raster = testImage.getRaster();
+		DataBufferByte dbb = (DataBufferByte)raster.getDataBuffer();
+		byte[] testBuffer = dbb.getData();
+		
+		double error = 0.0;
+		
+		//index 0 is alpha, start at 1 (blue)
+		for (int i = 1; i < size; i++) {
+			int blue1 = targetBuffer[i] & 0x0FF;
+			int blue2 = testBuffer[i++] & 0x0FF;
+			double blueError = blue1 - blue2;
+			blueError *= blueError;
+			
+			int green1 = targetBuffer[i] & 0x0FF;
+			int green2 = testBuffer[i++] & 0x0FF;
+			double greenError = green1 - green2;
+			greenError *= greenError;
+			
+			int red1 = targetBuffer[i] & 0x0FF;
+			int red2 = testBuffer[i++] & 0x0FF;
+			double redError = red1 - red2;
+			redError *= redError;
+			
+			error += redError + greenError  + blueError;
+		}
+		
+		return error;
+	}
+
+}


Property changes on: trunk/polycasso/src/com/mebigfatguy/polycasso/Feedback.java
___________________________________________________________________
Added: svn:mime-type
   + text/plain
Added: svn:eol-style
   + native


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