X-Git-Url: https://git.mdrn.pl/redakcja.git/blobdiff_plain/04b05946ab640eaf9135a73772b704dd41c323e7..717c14c014e3c988bcb392599a47ffa92630da78:/platforma/static/filebrowser/uploadify/com/adobe/images/PNGEncoder.as

diff --git a/platforma/static/filebrowser/uploadify/com/adobe/images/PNGEncoder.as b/platforma/static/filebrowser/uploadify/com/adobe/images/PNGEncoder.as
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+/*
+  Copyright (c) 2008, Adobe Systems Incorporated
+  All rights reserved.
+
+  Redistribution and use in source and binary forms, with or without 
+  modification, are permitted provided that the following conditions are
+  met:
+
+  * Redistributions of source code must retain the above copyright notice, 
+    this list of conditions and the following disclaimer.
+  
+  * Redistributions in binary form must reproduce the above copyright
+    notice, this list of conditions and the following disclaimer in the 
+    documentation and/or other materials provided with the distribution.
+  
+  * Neither the name of Adobe Systems Incorporated nor the names of its 
+    contributors may be used to endorse or promote products derived from 
+    this software without specific prior written permission.
+
+  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
+  IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+  THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+  PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR 
+  CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+  EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+  PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+  PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+  LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+package com.adobe.images
+{
+	import flash.geom.*;
+	import flash.display.Bitmap;
+	import flash.display.BitmapData;
+	import flash.utils.ByteArray;
+
+	/**
+	 * Class that converts BitmapData into a valid PNG
+	 */	
+	public class PNGEncoder
+	{
+		/**
+		 * Created a PNG image from the specified BitmapData
+		 *
+		 * @param image The BitmapData that will be converted into the PNG format.
+		 * @return a ByteArray representing the PNG encoded image data.
+		 * @langversion ActionScript 3.0
+		 * @playerversion Flash 9.0
+		 * @tiptext
+		 */			
+	    public static function encode(img:BitmapData):ByteArray {
+	        // Create output byte array
+	        var png:ByteArray = new ByteArray();
+	        // Write PNG signature
+	        png.writeUnsignedInt(0x89504e47);
+	        png.writeUnsignedInt(0x0D0A1A0A);
+	        // Build IHDR chunk
+	        var IHDR:ByteArray = new ByteArray();
+	        IHDR.writeInt(img.width);
+	        IHDR.writeInt(img.height);
+	        IHDR.writeUnsignedInt(0x08060000); // 32bit RGBA
+	        IHDR.writeByte(0);
+	        writeChunk(png,0x49484452,IHDR);
+	        // Build IDAT chunk
+	        var IDAT:ByteArray= new ByteArray();
+	        for(var i:int=0;i < img.height;i++) {
+	            // no filter
+	            IDAT.writeByte(0);
+	            var p:uint;
+	            var j:int;
+	            if ( !img.transparent ) {
+	                for(j=0;j < img.width;j++) {
+	                    p = img.getPixel(j,i);
+	                    IDAT.writeUnsignedInt(
+	                        uint(((p&0xFFFFFF) << 8)|0xFF));
+	                }
+	            } else {
+	                for(j=0;j < img.width;j++) {
+	                    p = img.getPixel32(j,i);
+	                    IDAT.writeUnsignedInt(
+	                        uint(((p&0xFFFFFF) << 8)|
+	                        (p>>>24)));
+	                }
+	            }
+	        }
+	        IDAT.compress();
+	        writeChunk(png,0x49444154,IDAT);
+	        // Build IEND chunk
+	        writeChunk(png,0x49454E44,null);
+	        // return PNG
+	        return png;
+	    }
+	
+	    private static var crcTable:Array;
+	    private static var crcTableComputed:Boolean = false;
+	
+	    private static function writeChunk(png:ByteArray, 
+	            type:uint, data:ByteArray):void {
+	        if (!crcTableComputed) {
+	            crcTableComputed = true;
+	            crcTable = [];
+	            var c:uint;
+	            for (var n:uint = 0; n < 256; n++) {
+	                c = n;
+	                for (var k:uint = 0; k < 8; k++) {
+	                    if (c & 1) {
+	                        c = uint(uint(0xedb88320) ^ 
+	                            uint(c >>> 1));
+	                    } else {
+	                        c = uint(c >>> 1);
+	                    }
+	                }
+	                crcTable[n] = c;
+	            }
+	        }
+	        var len:uint = 0;
+	        if (data != null) {
+	            len = data.length;
+	        }
+	        png.writeUnsignedInt(len);
+	        var p:uint = png.position;
+	        png.writeUnsignedInt(type);
+	        if ( data != null ) {
+	            png.writeBytes(data);
+	        }
+	        var e:uint = png.position;
+	        png.position = p;
+	        c = 0xffffffff;
+	        for (var i:int = 0; i < (e-p); i++) {
+	            c = uint(crcTable[
+	                (c ^ png.readUnsignedByte()) & 
+	                uint(0xff)] ^ uint(c >>> 8));
+	        }
+	        c = uint(c^uint(0xffffffff));
+	        png.position = e;
+	        png.writeUnsignedInt(c);
+	    }
+	}
+}
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