private static void embedPositionDetectionPattern(int xStart, int yStart, ByteMatrix matrix)
{
// We know the width and height.
if (POSITION_DETECTION_PATTERN[0].Length != 7 || POSITION_DETECTION_PATTERN.Length != 7)
{
throw new WriterException("Bad position detection pattern");
}
for (int y = 0; y < 7; ++y)
{
for (int x = 0; x < 7; ++x)
{
if (!isEmpty(matrix.get_Renamed(xStart + x, yStart + y)))
{
throw new WriterException();
}
matrix.set_Renamed(xStart + x, yStart + y, POSITION_DETECTION_PATTERN[y][x]);
}
}
}
// Note that we cannot unify the function with embedPositionDetectionPattern() despite they are
// almost identical, since we cannot write a function that takes 2D arrays in different sizes in
// C/C++. We should live with the fact.
private static void embedPositionAdjustmentPattern(int xStart, int yStart, ByteMatrix matrix)
{
// We know the width and height.
if (POSITION_ADJUSTMENT_PATTERN[0].Length != 5 || POSITION_ADJUSTMENT_PATTERN.Length != 5)
{
throw new WriterException("Bad position adjustment");
}
for (int y = 0; y < 5; ++y)
{
for (int x = 0; x < 5; ++x)
{
if (!isEmpty(matrix.get_Renamed(xStart + x, yStart + y)))
{
throw new WriterException();
}
matrix.set_Renamed(xStart + x, yStart + y, POSITION_ADJUSTMENT_PATTERN[y][x]);
}
}
}
// Apply mask penalty rule 2 and return the penalty. Find 2x2 blocks with the same color and give
// penalty to them.
public static int applyMaskPenaltyRule2(ByteMatrix matrix)
{
int penalty = 0;
sbyte[][] array = matrix.Array;
int width = matrix.Width;
int height = matrix.Height;
for (int y = 0; y < height - 1; ++y)
{
for (int x = 0; x < width - 1; ++x)
{
int value_Renamed = array[y][x];
if (value_Renamed == array[y][x + 1] && value_Renamed == array[y + 1][x] && value_Renamed == array[y + 1][x + 1])
{
penalty += 3;
}
}
}
return(penalty);
}
// Apply mask penalty rule 4 and return the penalty. Calculate the ratio of dark cells and give
// penalty if the ratio is far from 50%. It gives 10 penalty for 5% distance. Examples:
// - 0% => 100
// - 40% => 20
// - 45% => 10
// - 50% => 0
// - 55% => 10
// - 55% => 20
// - 100% => 100
public static int applyMaskPenaltyRule4(ByteMatrix matrix)
{
int numDarkCells = 0;
sbyte[][] array = matrix.Array;
int width = matrix.Width;
int height = matrix.Height;
for (int y = 0; y < height; ++y)
{
for (int x = 0; x < width; ++x)
{
if (array[y][x] == 1)
{
numDarkCells += 1;
}
}
}
int numTotalCells = matrix.Height * matrix.Width;
double darkRatio = (double)numDarkCells / numTotalCells;
//UPGRADE_WARNING: Data types in Visual C# might be different. Verify the accuracy of narrowing conversions. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1042'"
return(System.Math.Abs((int)(darkRatio * 100 - 50)) / 5 * 10);
}
// Build 2D matrix of QR Code from "dataBits" with "ecLevel", "version" and "getMaskPattern". On
// success, store the result in "matrix" and return true.
public static void buildMatrix(BitVector dataBits, ErrorCorrectionLevel ecLevel, int version, int maskPattern, ByteMatrix matrix)
{
clearMatrix(matrix);
embedBasicPatterns(version, matrix);
// Type information appear with any version.
embedTypeInfo(ecLevel, maskPattern, matrix);
// Version info appear if version >= 7.
maybeEmbedVersionInfo(version, matrix);
// Data should be embedded at end.
embedDataBits(dataBits, maskPattern, matrix);
}
// Set all cells to -1. -1 means that the cell is empty (not set yet).
//
// JAVAPORT: We shouldn't need to do this at all. The code should be rewritten to begin encoding
// with the ByteMatrix initialized all to zero.
public static void clearMatrix(ByteMatrix matrix)
{
matrix.clear((sbyte)(-1));
}
private static void embedHorizontalSeparationPattern(int xStart, int yStart, ByteMatrix matrix)
{
// We know the width and height.
if (HORIZONTAL_SEPARATION_PATTERN[0].Length != 8 || HORIZONTAL_SEPARATION_PATTERN.Length != 1)
{
throw new WriterException("Bad horizontal separation pattern");
}
for (int x = 0; x < 8; ++x)
{
if (!isEmpty(matrix.get_Renamed(xStart + x, yStart)))
{
throw new WriterException();
}
matrix.set_Renamed(xStart + x, yStart, HORIZONTAL_SEPARATION_PATTERN[0][x]);
}
}
// Embed type information. On success, modify the matrix.
public static void embedTypeInfo(ErrorCorrectionLevel ecLevel, int maskPattern, ByteMatrix matrix)
{
BitVector typeInfoBits = new BitVector();
makeTypeInfoBits(ecLevel, maskPattern, typeInfoBits);
for (int i = 0; i < typeInfoBits.size(); ++i)
{
// Place bits in LSB to MSB order. LSB (least significant bit) is the last value in
// "typeInfoBits".
int bit = typeInfoBits.at(typeInfoBits.size() - 1 - i);
// Type info bits at the left top corner. See 8.9 of JISX0510:2004 (p.46).
int x1 = TYPE_INFO_COORDINATES[i][0];
int y1 = TYPE_INFO_COORDINATES[i][1];
matrix.set_Renamed(x1, y1, bit);
if (i < 8)
{
// Right top corner.
int x2 = matrix.Width - i - 1;
int y2 = 8;
matrix.set_Renamed(x2, y2, bit);
}
else
{
// Left bottom corner.
int x2 = 8;
int y2 = matrix.Height - 7 + (i - 8);
matrix.set_Renamed(x2, y2, bit);
}
}
}
// Note that the input matrix uses 0 == white, 1 == black, while the output matrix uses
// 0 == black, 255 == white (i.e. an 8 bit greyscale bitmap).
private static ByteMatrix renderResult(QRCode code, int width, int height, bool quietZone)
{
unchecked
{
ByteMatrix input = code.Matrix;
int inputWidth = input.Width;
int inputHeight = input.Height;
int qrWidth = inputWidth + (quietZone ? QUIET_ZONE_SIZE << 1 : 0);
int qrHeight = inputHeight + (quietZone ? QUIET_ZONE_SIZE << 1 : 0);
int outputWidth = System.Math.Max(width, qrWidth);
int outputHeight = System.Math.Max(height, qrHeight);
int multiple = System.Math.Min(outputWidth / qrWidth, outputHeight / qrHeight);
// Padding includes both the quiet zone and the extra white pixels to accommodate the requested
// dimensions. For example, if input is 25x25 the QR will be 33x33 including the quiet zone.
// If the requested size is 200x160, the multiple will be 4, for a QR of 132x132. These will
// handle all the padding from 100x100 (the actual QR) up to 200x160.
int leftPadding = (outputWidth - (inputWidth * multiple)) / 2;
int topPadding = (outputHeight - (inputHeight * multiple)) / 2;
ByteMatrix output = new ByteMatrix(outputWidth, outputHeight);
sbyte[][] outputArray = output.Array;
// We could be tricky and use the first row in each set of multiple as the temporary storage,
// instead of allocating this separate array.
sbyte[] row = new sbyte[outputWidth];
// 1. Write the white lines at the top
for (int y = 0; y < topPadding; y++)
{
setRowColor(outputArray[y], (sbyte)SupportClass.Identity(255));
}
// 2. Expand the QR image to the multiple
sbyte[][] inputArray = input.Array;
for (int y = 0; y < inputHeight; y++)
{
// a. Write the white pixels at the left of each row
for (int x = 0; x < leftPadding; x++)
{
row[x] = (sbyte)SupportClass.Identity(255);
}
// b. Write the contents of this row of the barcode
int offset = leftPadding;
for (int x = 0; x < inputWidth; x++)
{
// Redivivus.in Java to c# Porting update - Type cased sbyte
// 30/01/2010
// sbyte value_Renamed = (inputArray[y][x] == 1)?0:(sbyte) SupportClass.Identity(255);
sbyte value_Renamed = (sbyte)((inputArray[y][x] == 1) ? 0 : SupportClass.Identity(255));
for (int z = 0; z < multiple; z++)
{
row[offset + z] = value_Renamed;
}
offset += multiple;
}
// c. Write the white pixels at the right of each row
offset = leftPadding + (inputWidth * multiple);
for (int x = offset; x < outputWidth; x++)
{
row[x] = (sbyte)SupportClass.Identity(255);
}
// d. Write the completed row multiple times
offset = topPadding + (y * multiple);
for (int z = 0; z < multiple; z++)
{
Array.Copy(row, 0, outputArray[offset + z], 0, outputWidth);
}
}
// 3. Write the white lines at the bottom
int offset2 = topPadding + (inputHeight * multiple);
for (int y = offset2; y < outputHeight; y++)
{
setRowColor(outputArray[y], (sbyte)SupportClass.Identity(255));
}
return(output);
}
}
public static void encode(System.String content, ErrorCorrectionLevel ecLevel, System.String encoding, QRCode qrCode)
{
if (encoding == null)
{
encoding = DEFAULT_BYTE_MODE_ENCODING;
}
// Step 1: Choose the mode (encoding).
Mode mode = chooseMode(content, encoding);
// Step 2: Append "bytes" into "dataBits" in appropriate encoding.
BitVector dataBits = new BitVector();
appendBytes(content, mode, dataBits, encoding);
// Step 3: Initialize QR code that can contain "dataBits".
int numInputBytes = dataBits.sizeInBytes();
initQRCode(numInputBytes, ecLevel, mode, qrCode);
// Step 4: Build another bit vector that contains header and data.
BitVector headerAndDataBits = new BitVector();
// tz - commented out to match zxing encoder online
// Step 4.5: Append ECI message if applicable
/*if (mode == Mode.BYTE && !DEFAULT_BYTE_MODE_ENCODING.Equals(encoding))
* {
* CharacterSetECI eci = CharacterSetECI.getCharacterSetECIByName(encoding);
* if (eci != null)
* {
* appendECI(eci, headerAndDataBits);
* }
* }*/
appendModeInfo(mode, headerAndDataBits);
int numLetters = mode.Equals(Mode.BYTE)?dataBits.sizeInBytes():content.Length;
appendLengthInfo(numLetters, qrCode.Version, mode, headerAndDataBits);
headerAndDataBits.appendBitVector(dataBits);
// Step 5: Terminate the bits properly.
terminateBits(qrCode.NumDataBytes, headerAndDataBits);
// Step 6: Interleave data bits with error correction code.
BitVector finalBits = new BitVector();
interleaveWithECBytes(headerAndDataBits, qrCode.NumTotalBytes, qrCode.NumDataBytes, qrCode.NumRSBlocks, finalBits);
// Step 7: Choose the mask pattern and set to "qrCode".
ByteMatrix matrix = new ByteMatrix(qrCode.MatrixWidth, qrCode.MatrixWidth);
qrCode.MaskPattern = chooseMaskPattern(finalBits, qrCode.ECLevel, qrCode.Version, matrix);
// Step 8. Build the matrix and set it to "qrCode".
MatrixUtil.buildMatrix(finalBits, qrCode.ECLevel, qrCode.Version, qrCode.MaskPattern, matrix);
qrCode.Matrix = matrix;
// Step 9. Make sure we have a valid QR Code.
if (!qrCode.Valid)
{
throw new WriterException("Invalid QR code: " + qrCode.ToString());
}
}
private static int chooseMaskPattern(BitVector bits, ErrorCorrectionLevel ecLevel, int version, ByteMatrix matrix)
{
int minPenalty = System.Int32.MaxValue; // Lower penalty is better.
int bestMaskPattern = -1;
// We try all mask patterns to choose the best one.
for (int maskPattern = 0; maskPattern < QRCode.NUM_MASK_PATTERNS; maskPattern++)
{
MatrixUtil.buildMatrix(bits, ecLevel, version, maskPattern, matrix);
int penalty = calculateMaskPenalty(matrix);
if (penalty < minPenalty)
{
minPenalty = penalty;
bestMaskPattern = maskPattern;
}
}
return(bestMaskPattern);
}
// Apply mask penalty rule 1 and return the penalty. Find repetitive cells with the same color and
// give penalty to them. Example: 00000 or 11111.
public static int applyMaskPenaltyRule1(ByteMatrix matrix)
{
return(applyMaskPenaltyRule1Internal(matrix, true) + applyMaskPenaltyRule1Internal(matrix, false));
}
