1 files changed, 126 insertions, 0 deletions
diff --git a/webcam/com/neave/webcam/effects/pixel/RGBEffect.as b/webcam/com/neave/webcam/effects/pixel/RGBEffect.as
new file mode 100755
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+++ b/webcam/com/neave/webcam/effects/pixel/RGBEffect.as
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+/**
+ * Neave Webcam // Red Green Blue Effect
+ * 
+ * Copyright (C) 2008 Paul Neave
+ * http://www.neave.com/
+ * 
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation at http://www.gnu.org/licenses/gpl.html
+ */
+
+package com.neave.webcam.effects.pixel
+{
+	import flash.display.*;
+	import flash.geom.*;
+	import com.neave.webcam.effects.*;
+	
+	public class RGBEffect extends AbstractEffect
+	{
+		private const COLORS:Array = [0xFF0000, 0x00FF00, 0x0000FF];
+		
+		private var pixelsWide:int;
+		private var smallBitmap:BitmapData;
+		private var smallMatrix:Matrix;
+		private var pixels:Sprite;
+		private var pixelsX:int;
+		private var pixelsY:int;
+		private var size:Number;
+		
+		/**
+		 * Creates a low-resolution effect where each pixel is split into its red, green and blue components
+		 * 
+		 * @param	source			The source object to use for the effect
+		 * @param	targetBitmap	The target bitmap data to draw the resulting effect into
+		 * @param	pixelsWide		The number of pixels to use in width
+		 */
+		public function RGBEffect(source:IBitmapDrawable, targetBitmap:BitmapData, pixelsWide:int = 40)
+		{
+			super(source, targetBitmap, "RGB");
+			this.pixelsWide = pixelsWide < 3 ? 3 : pixelsWide;
+			
+			createRGB();
+		}
+		
+		/**
+		 * Sets up the RGB effect
+		 */
+		private function createRGB():void
+		{
+			// Create a smaller, lower resolution bitmap to sample pixels from
+			smallBitmap = new BitmapData(pixelsWide, Math.round(pixelsWide * rect.height / rect.width), false, 0xFF000000);
+			pixelsX = smallBitmap.width;
+			pixelsY = smallBitmap.height;
+			smallMatrix = new Matrix();
+			smallMatrix.scale(pixelsX / rect.width, pixelsY / rect.height);
+			size = rect.width / pixelsX;
+			
+			// Create a sprite containing all the RGB pixels needed
+			pixels = new Sprite();
+			for (var y:int = pixelsY; y--; )
+			{
+				for (var x:int = pixelsX; x--; )
+				{
+					// Position each RGB pixel and set its colour to either red, green or blue
+					pixels.addChild(new RGBPixel((x + 0.5) * size, (y + 0.5) * size, COLORS[x % 3], size));
+				}
+			}
+		}
+		
+		/**
+		 * Draws the RGB effect
+		 */
+		override public function draw():void
+		{
+			// Generate a lower resolution bitmap data to sample pixels from
+			smallBitmap.draw(source, smallMatrix, color);
+			
+			// Create the RGB pixels from each pixel
+			var n:int = 0;
+			for (var y:int = pixelsY; y--; )
+			{
+				for (var x:int = pixelsX; x--; )
+				{
+					// Set the brightness of this RGB pixel
+					var c:uint = smallBitmap.getPixel(x, y);
+					var p:RGBPixel = pixels.getChildAt(n++) as RGBPixel;
+					switch (x % 3)
+					{
+						case 0: // Red
+						p.alpha = ((c >> 16) & 0xFF) / 0xFF;
+						break;
+						
+						case 1: // Green
+						p.alpha = ((c >> 8) & 0xFF) / 0xFF;
+						break;
+						
+						case 2: // Blue
+						p.alpha = (c & 0xFF) / 0xFF;
+						break;
+					}
+				}
+			}
+			
+			// Draw the new RGB pixels
+			targetBitmap.lock();
+			targetBitmap.fillRect(rect, 0xFF000000);
+			targetBitmap.draw(pixels);
+			targetBitmap.unlock();
+		}
+		
+		/**
+		 * Removes the RGB effect and all other referenced objects
+		 */
+		override public function destroy():void
+		{
+			super.destroy();
+			
+			// Remove all the pixels
+			for (var i:int = pixelsX * pixelsY; i--; ) pixels.removeChildAt(i);
+			pixels = null;
+			
+			smallBitmap.dispose();
+			smallBitmap = null;
+		}
+	}
+}
+\ No newline at end of file