/// <summary>
///
/// </summary>
/// <param name="xStart"></param>
/// <param name="yStart"></param>
/// <param name="matrix"></param>
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]);
}
}
}
// Embed position detection patterns and surrounding vertical/horizontal separators.
private static void embedPositionDetectionPatternsAndSeparators(ByteMatrix matrix)
{
// Embed three big squares at corners.
int pdpWidth = POSITION_DETECTION_PATTERN[0].Length;
// Left top corner.
embedPositionDetectionPattern(0, 0, matrix);
// Embed horizontal separation patterns around the squares.
int hspWidth = HORIZONTAL_SEPARATION_PATTERN[0].Length;
// Left top corner.
embedHorizontalSeparationPattern(0, hspWidth - 1, matrix);
// Embed vertical separation patterns around the squares.
int vspSize = VERTICAL_SEPARATION_PATTERN.Length;
// Left top corner.
embedVerticalSeparationPattern(vspSize, 0, matrix);
}
// 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, version, maskPattern, matrix);
// Data should be embedded at end.
embedDataBits(dataBits, maskPattern, matrix);
}
private const int TYPE_INFO_MASK_PATTERN = 0x4445; //100010001000101
// 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));
}
// Embed type information. On success, modify the matrix.
public static void embedTypeInfo(ErrorCorrectionLevel ecLevel, int version, int maskPattern, ByteMatrix matrix)
{
BitVector typeInfoBits = new BitVector();
makeTypeInfoBits(ecLevel, version, 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);
}
}
