qrcodedecoder.java

QRcode二维码生成源代码,一个做条形码的代码

					if (x % 3 == 0)
						maskPattern[x][y] = true;
					break;
				case 3: // 011
					if ((x + y) % 3 == 0)
						maskPattern[x][y] = true;
					break;
				case 4: // 100
					if ((x / 3 + y / 2) % 2 == 0)
						maskPattern[x][y] = true;
					break;
				case 5: // 101
					if ((x * y) % 2 + (x * y) % 3 == 0)
						maskPattern[x][y] = true;
					break;
				case 6: // 110
					if (((x * y) % 2 + (x * y) % 3) % 2 == 0)
						maskPattern[x][y] = true;
					break;
				case 7: // 111
					if (((x * y) % 3 + (x + y) % 2) % 2 == 0)
						maskPattern[x][y] = true;
					break;
				}
			}
		}
		return maskPattern;
	}
	
	int[] getBlocks(QRCodeSymbol symbol) {
		int width = symbol.getWidth();
		//System.out.println("SymbolWidth:" + Integer.toString(symbol.getWidth()));
		//System.out.println("SymbolHeight:" + Integer.toString(symbol.getHeight()));
		int height = symbol.getHeight();
		int x = width - 1;
		int y = height - 1;
		Vector codeBits = new Vector();
		Vector codeWords = new Vector();
		int tempWord = 0;
		int figure = 7;
		int isNearFinish = 0;
		final boolean READ_UP = true;
		final boolean READ_DOWN = false;
		boolean direction = READ_UP;
		
		do {
			//canvas.drawPoint(new Point(x * 4 +8 , y * 4 + 47), Color.RED);
			codeBits.addElement(new Boolean(symbol.getElement(x, y)));
			//System.out.println(Integer.toString(codeBits.size()));
			//canvas.drawPoint(new Point(x*3 + 120,y*3 + 190), Color.RED);
			//int ratio = canvas.getWidth() / symbol.getWidth();
			//int offsetX = (canvas.getWidth() - symbol.getWidth() * ratio) / 2;
			//int offsetY = (canvas.getHeight() - symbol.getHeight() * ratio) / 2;
			//canvas.drawPoint(new Point(offsetX + x * ratio + 3, offsetY + y * ratio + 3), 0xFF0000);
			if (symbol.getElement(x, y) == true) {
				tempWord += 1 << figure;
			}
			//System.out.println(new Point(x, y).toString() + " " + symbol.getElement(x, y));
			figure--;
			if (figure == -1) {
				codeWords.addElement(new Integer(tempWord));
				//System.out.print(codeWords.size() + ": ");
				//System.out.println(tempWord);
				figure = 7;
				tempWord = 0;
			}
			//師偵撉傓儌僕儏乕儖傪寛掕偡傞
			do {
				if (direction == READ_UP) {
					if ((x + isNearFinish) % 2 == 0) //擇楍偺偆偪塃懁側傜
						x--; //嵍懁
					else { 
						if (y > 0) { //忋偵恑傔傞
							x++;
							y--;
						}
						else { //恑傔側偄
							x--; //曽岦揮姺偟
							if (x == 6){
								x--;
								isNearFinish=1; // 廲偺僞僀儈儞僌僷僞乕儞傪捠夁偡傞偙偲偵傛偭偰敾掕傪曄偊傞
							}
							direction = READ_DOWN;
						}
					}			
				}
				
				else {
					if ((x + isNearFinish) % 2 == 0) //擇楍偺偆偪嵍懁側傜
						x--; 
					else {
						if (y < height - 1) {
							x++;
							y++;
						}
						else {
							x--;
							if (x == 6){
								x--;
								isNearFinish=1;
							}
							direction = READ_UP;
						}
					}				
				}
			} while (symbol.isInFunctionPattern(x, y));

		} while (x != -1);
		
		int[] gotWords = new int[codeWords.size()];
		for (int i = 0; i < codeWords.size(); i++) {
			Integer temp = (Integer)codeWords.elementAt(i);
			gotWords[i] = temp.intValue();
		}
		return gotWords; 
	}

	int[] getCorrectedDataBlocks(int[] blocks) {
		int numErrors = 0;
		//System.out.println(":");
		//System.out.println("blockLength: " + blocks.length);
		int version = symbol.getVersion();
		//System.out.println("Version: " + version);
		int errorCollectionLevel = symbol.getErrorCollectionLevel();
		//System.out.println("errorCollectionLevel:" + errorCollectionLevel);
		int dataCapacity = symbol.getDataCapacity();
		int[]  dataBlocks = new int[dataCapacity];
		//System.out.println("dataCapacity: " + dataCapacity);
		int numErrorCollectionCode = symbol.getNumErrorCollectionCode();
		//System.out.println("numErrorCollectionCode:" + numErrorCollectionCode);
		int numRSBlocks = symbol.getNumRSBlocks();
		int eccPerRSBlock = numErrorCollectionCode / numRSBlocks;
		//System.out.println("numRSBlocks: " + numRSBlocks);
		if (numRSBlocks == 1) {
			//[TODO]僄儔乕掶惓張棟
//			for (int k = 0; k < blocks.length; k++) {
//				System.out.print(String.valueOf(blocks[k]) + ",");
//			}
//			System.out.println("");
//			System.out.println("numWords="+String.valueOf(blocks.length));

			ReedSolomon corrector = new ReedSolomon(blocks);
			corrector.correct();
			numErrors += corrector.getNumCorrectedErrors();
			if (numErrors > 0)
				canvas.println(String.valueOf(numErrors) + " data errors corrected.");
			else
				canvas.println("No errors found.");				
			return blocks;
		}
		else  { //RS僽儘僢僋偑2偮埲忋偺偨傔丄僨乕僞僽儘僢僋暲傃懼偊偁傝
			int numLongerRSBlocks = dataCapacity % numRSBlocks;
			
			if (numLongerRSBlocks == 0) { //RS僽儘僢僋偼1庬椶
				int lengthRSBlock = dataCapacity / numRSBlocks;
				int[][] RSBlocks = new int[numRSBlocks][lengthRSBlock];
				//RS僽儘僢僋傪摼傞
				for (int i = 0; i < numRSBlocks; i++) {
					//System.out.println("i = " + i);
					//for (int j = 0; j < lengthRSBlock  - numErrorCollectionCode / numRSBlocks ; j++) {
					for (int j = 0; j < lengthRSBlock; j++) {
								//System.out.println("j = " + j);
					//try {
							RSBlocks[i][j] = blocks[j * numRSBlocks + i];
						//} catch (ArrayIndexOutOfBoundsException e) {}
					}
					//[TODO]僄儔乕掶惓張棟
//					for (int k = 0; k < RSBlocks[i].length; k++) {
//						System.out.print(String.valueOf(RSBlocks[i][k]) + ",");
//					}
					//System.out.println("");
					//System.out.println("numWords="+String.valueOf(RSBlocks[i].length));

					ReedSolomon corrector = new ReedSolomon(RSBlocks[i]);
					corrector.correct();
					numErrors += corrector.getNumCorrectedErrors();

				}
				//僨乕僞晹暘偺傒敳偒弌偡
				int p = 0;
				for (int i = 0; i < numRSBlocks; i++) {
					for (int j = 0; j < lengthRSBlock - eccPerRSBlock; j++) {
						dataBlocks[p++] = RSBlocks[i][j];
					}
				}
			}
			else { //RS僽儘僢僋偼2庬椶
				int lengthShorterRSBlock = dataCapacity / numRSBlocks;
				//System.out.println("lengthShorterRSBlock : " + lengthShorterRSBlock);
				int lengthLongerRSBlock = dataCapacity / numRSBlocks + 1;
				//System.out.println("lengthLongerRSBlock: " + lengthLongerRSBlock);
				int numShorterRSBlocks = numRSBlocks - numLongerRSBlocks;
				//System.out.println("numShorterRSBlocks: " + numShorterRSBlocks);
				//System.out.println("numLongerRSBlocks: " + numLongerRSBlocks);
				int[][] shorterRSBlocks = new int[numShorterRSBlocks][lengthShorterRSBlock];
				int[][] longerRSBlocks = new int[numLongerRSBlocks][lengthLongerRSBlock];
				for (int i = 0; i < numRSBlocks; i++) {
					//System.out.println("i = " + i);
					if (i < numShorterRSBlocks) { 
						//抁偄曽偺RS僽儘僢僋傪摼傞
						//for (int j = 0; j < lengthShorterRSBlock - numErrorCollectionCode / numRSBlocks ; j++) {
						int mod = 0;

						for (int j = 0; j < lengthShorterRSBlock; j++) {
									//System.out.println(" j = " + j);
							if (j == lengthShorterRSBlock - eccPerRSBlock) mod = numLongerRSBlocks;
							//System.out.print(String.valueOf(j * numRSBlocks + i + mod) + ",");
							shorterRSBlocks[i][j] = blocks[j * numRSBlocks + i + mod];
						}
						//System.out.println("");
						//[TODO]僄儔乕掶惓張棟
						
//						for (int k = 0; k < shorterRSBlocks[i].length; k++) {
//							System.out.print(String.valueOf(shorterRSBlocks[i][k]) + ",");
//						}
						//System.out.println("");
						//System.out.println("numWords="+String.valueOf(shorterRSBlocks[i].length));

						
						ReedSolomon corrector = new ReedSolomon(shorterRSBlocks[i]);
						corrector.correct();
						numErrors += corrector.getNumCorrectedErrors();

					}
					else { 
						//System.out.println("Debug" + String.valueOf(numShorterRSBlocks));

						//挿偄曽偺RS僽儘僢僋傪摼傞
						//for (int j = 0; j < lengthLongerRSBlock - numErrorCollectionCode / numRSBlocks ; j++) {
						int mod = 0;
						for (int j = 0; j < lengthLongerRSBlock; j++) {
							//System.out.println(" j = " + j);
							//try {
							if (j == lengthShorterRSBlock - eccPerRSBlock) mod = numShorterRSBlocks;

//							System.out.print("," + String.valueOf(j * numRSBlocks + i - mod));
							longerRSBlocks[i - numShorterRSBlocks][j] = blocks[j * numRSBlocks + i - mod];
							//} catch (Exception e) {e.getMessage();}
						}

						//System.out.println("debug2");
						//[TODO]僄儔乕掶惓張棟
						
//						for (int k = 0; k < longerRSBlocks[i - numShorterRSBlocks].length; k++) {
//							System.out.print(String.valueOf(longerRSBlocks[i - numShorterRSBlocks][k]) + ",");
//						}
						
						//System.out.println("");
						//System.out.println("numWords="+String.valueOf(longerRSBlocks[i - numShorterRSBlocks].length));

						
						ReedSolomon corrector = new ReedSolomon(longerRSBlocks[i - numShorterRSBlocks]);
						corrector.correct();
						numErrors += corrector.getNumCorrectedErrors();


					}
				}
				int p = 0;
				for (int i = 0; i < numRSBlocks; i++) {
					if (i < numShorterRSBlocks) {
						for (int j = 0; j < lengthShorterRSBlock - eccPerRSBlock; j++) {
							dataBlocks[p++] = shorterRSBlocks[i][j];
						}
					}
					else {
						for (int j = 0; j < lengthLongerRSBlock - eccPerRSBlock; j++) {
							dataBlocks[p++] = longerRSBlocks[i - numShorterRSBlocks][j];
						}
					}
				}
			}
			if (numErrors > 0)
				canvas.println(String.valueOf(numErrors) + " data errors corrected.");
			return dataBlocks;
		}
	}
	
	String getDecodedString(int[] blocks, int version) throws IllegalDataBlockException {
		//canvas.println("Reading data.");
		String dataString = null;

		QRCodeDataBlockReader reader = new QRCodeDataBlockReader(blocks, version);
		try {
			dataString = reader.getDataString();
		} catch (ArrayIndexOutOfBoundsException e) {
			//canvas.println("ERROR: Data block error");
			throw new IllegalDataBlockException();
		}
		return dataString;
	}
	public DebugCanvas getCanvas() {
		return canvas;
	}
	public void setCanvas(DebugCanvas canvas) {
		this.canvas = canvas;
	}
}