/*
* Copyright 2012 ZXing authors
*
* 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.
*/
using System;
using System.Collections.Generic;
using ZXing.Common;
using ZXing.PDF417.Internal;
namespace ZXing.PDF417
{
/// <summary>
/// <author>Jacob Haynes</author>
/// <author>[email protected] (Andrew Walbran)</author>
/// </summary>
public sealed class PDF417Writer : Writer
{
/// <summary>
/// default white space (margin) around the code
/// </summary>
private const int WHITE_SPACE = 30;
/// <summary>
/// </summary>
/// <param name="contents">The contents to encode in the barcode</param>
/// <param name="format">The barcode format to generate</param>
/// <param name="width">The preferred width in pixels</param>
/// <param name="height">The preferred height in pixels</param>
/// <param name="hints">Additional parameters to supply to the encoder</param>
/// <returns>
/// The generated barcode as a Matrix of unsigned bytes (0 == black, 255 == white)
/// </returns>
public BitMatrix encode(String contents,
BarcodeFormat format,
int width,
int height,
IDictionary<EncodeHintType, object> hints)
{
if (format != BarcodeFormat.PDF_417)
{
throw new ArgumentException("Can only encode PDF_417, but got " + format);
}
var encoder = new Internal.PDF417();
var margin = WHITE_SPACE;
var errorCorrectionLevel = 2;
if (hints != null)
{
if (hints.ContainsKey(EncodeHintType.PDF417_COMPACT))
{
encoder.setCompact((Boolean) hints[EncodeHintType.PDF417_COMPACT]);
}
if (hints.ContainsKey(EncodeHintType.PDF417_COMPACTION))
{
encoder.setCompaction((Compaction) hints[EncodeHintType.PDF417_COMPACTION]);
}
if (hints.ContainsKey(EncodeHintType.PDF417_DIMENSIONS))
{
var dimensions = (Dimensions) hints[EncodeHintType.PDF417_DIMENSIONS];
encoder.setDimensions(dimensions.MaxCols,
dimensions.MinCols,
dimensions.MaxRows,
dimensions.MinRows);
}
if (hints.ContainsKey(EncodeHintType.MARGIN))
{
margin = (int)(hints[EncodeHintType.MARGIN]);
}
if (hints.ContainsKey(EncodeHintType.ERROR_CORRECTION))
{
var value = hints[EncodeHintType.ERROR_CORRECTION];
if (value is PDF417ErrorCorrectionLevel ||
value is int)
{
errorCorrectionLevel = (int)value;
}
}
if (hints.ContainsKey(EncodeHintType.CHARACTER_SET))
{
#if !SILVERLIGHT || WINDOWS_PHONE
var encoding = (String)hints[EncodeHintType.CHARACTER_SET];
if (encoding != null)
{
encoder.setEncoding(encoding);
}
#else
// Silverlight supports only UTF-8 and UTF-16 out-of-the-box
encoder.setEncoding("UTF-8");
#endif
}
if (hints.ContainsKey(EncodeHintType.DISABLE_ECI))
{
encoder.setDisableEci((bool)hints[EncodeHintType.DISABLE_ECI]);
}
}
return bitMatrixFromEncoder(encoder, contents, width, height, margin, errorCorrectionLevel);
}
/// <summary>
/// Encode a barcode using the default settings.
/// </summary>
/// <param name="contents">The contents to encode in the barcode</param>
/// <param name="format">The barcode format to generate</param>
/// <param name="width">The preferred width in pixels</param>
/// <param name="height">The preferred height in pixels</param>
/// <returns>
/// The generated barcode as a Matrix of unsigned bytes (0 == black, 255 == white)
/// </returns>
public BitMatrix encode(String contents,
BarcodeFormat format,
int width,
int height)
{
return encode(contents, format, width, height, null);
}
/// <summary>
/// Takes encoder, accounts for width/height, and retrieves bit matrix
/// </summary>
private static BitMatrix bitMatrixFromEncoder(Internal.PDF417 encoder,
String contents,
int width,
int height,
int margin,
int errorCorrectionLevel)
{
encoder.generateBarcodeLogic(contents, errorCorrectionLevel);
const int lineThickness = 2;
const int aspectRatio = 4;
sbyte[][] originalScale = encoder.BarcodeMatrix.getScaledMatrix(lineThickness, aspectRatio*lineThickness);
bool rotated = false;
if ((height > width) ^ (originalScale[0].Length < originalScale.Length))
{
originalScale = rotateArray(originalScale);
rotated = true;
}
int scaleX = width/originalScale[0].Length;
int scaleY = height/originalScale.Length;
int scale;
if (scaleX < scaleY)
{
scale = scaleX;
}
else
{
scale = scaleY;
}
if (scale > 1)
{
sbyte[][] scaledMatrix =
encoder.BarcodeMatrix.getScaledMatrix(scale*lineThickness, scale*aspectRatio*lineThickness);
if (rotated)
{
scaledMatrix = rotateArray(scaledMatrix);
}
return bitMatrixFrombitArray(scaledMatrix, margin);
}
return bitMatrixFrombitArray(originalScale, margin);
}
/// <summary>
/// This takes an array holding the values of the PDF 417
/// </summary>
/// <param name="input">a byte array of information with 0 is black, and 1 is white</param>
/// <param name="margin">border around the barcode</param>
/// <returns>BitMatrix of the input</returns>
private static BitMatrix bitMatrixFrombitArray(sbyte[][] input, int margin)
{
// Creates the bitmatrix with extra space for whitespace
var output = new BitMatrix(input[0].Length + 2 * margin, input.Length + 2 * margin);
var yOutput = output.Height - margin - 1;
for (int y = 0; y < input.Length; y++)
{
var currentInput = input[y];
var currentInputLength = currentInput.Length;
for (int x = 0; x < currentInputLength; x++)
{
// Zero is white in the bytematrix
if (currentInput[x] == 1)
{
output[x + margin, yOutput] = true;
}
}
yOutput--;
}
return output;
}
/// <summary>
/// Takes and rotates the it 90 degrees
/// </summary>
private static sbyte[][] rotateArray(sbyte[][] bitarray)
{
sbyte[][] temp = new sbyte[bitarray[0].Length][];
for (int idx = 0; idx < bitarray[0].Length; idx++)
temp[idx] = new sbyte[bitarray.Length];
for (int ii = 0; ii < bitarray.Length; ii++)
{
// This makes the direction consistent on screen when rotating the
// screen;
int inverseii = bitarray.Length - ii - 1;
for (int jj = 0; jj < bitarray[0].Length; jj++)
{
temp[jj][inverseii] = bitarray[ii][jj];
}
}
return temp;
}
}
}
