/// <summary>
/// Calculate <c>QR</c> code format
/// </summary>
/// <param name="error">
/// The error code information.
/// </param>
/// <param name="mask">
/// The mask.
/// </param>
private void CalculateFormat(QrError error, QrMask mask)
{
// Get error bits
if (this.debugData != null)
{
this.debugData.Append("- Calculating format bits...\n");
}
// Get 5 bits of format information
int formatInfo = (QrErrorBits.GetBits(error) << 3) | BinaryExtensions.BinToDec(mask.GetBits());
if (this.debugData != null)
{
this.debugData.Append(
"- Format information error and mask bits: "
+ BinaryExtensions.BinaryToString(BinaryExtensions.DecToBin(formatInfo)) + "\n");
this.debugData.Append("- Calculating BCH (15,5) code for information bits...\n");
}
int bchCode = QrBoseChaudhuriHocquenghem.CalculateBch(formatInfo, QrConst.GenPolyFormat);
if (this.debugData != null)
{
this.debugData.Append(
"- BCH (15,5) error code: " + BinaryExtensions.BinaryToString(BinaryExtensions.DecToBin(bchCode))
+ "\n");
}
// Append BCH code to format info
formatInfo = (formatInfo << 10) | bchCode;
if (this.debugData != null)
{
this.debugData.Append(
"- Format information with appended BCH: "
+ BinaryExtensions.BinaryToString(BinaryExtensions.DecToBin(formatInfo)) + "\n");
this.debugData.Append(
"- Calculating XOR with format constant: "
+ BinaryExtensions.BinaryToString(BinaryExtensions.DecToBin(QrConst.ConstFormatXor)) + "\n");
}
formatInfo = formatInfo ^ QrConst.ConstFormatXor;
if (this.debugData != null)
{
this.debugData.Append(
"- Final format: " + BinaryExtensions.BinaryToString(BinaryExtensions.DecToBin(formatInfo, 15))
+ "\n");
}
List <bool> formatBits = BinaryExtensions.DecToBin(formatInfo, 15);
// Reverse, because our QRCode is inserting backwards
formatBits.Reverse();
foreach (bool t in formatBits)
{
this.output.Enqueue(t);
}
}
/// <summary>
/// The write version.
/// </summary>
/// <param name="codeVersion">
/// The version.
/// </param>
private void WriteVersion(QrVersion codeVersion)
{
if (this.debugData != null)
{
this.debugData.Append("- Should we write version information bits?\n");
}
// Only writing version with versions higher than 6
if (codeVersion.Version >= 7)
{
// Calculate BCH (18, 6) for version information
int bchVersion = QrBoseChaudhuriHocquenghem.CalculateBch(codeVersion.Version, QrConst.GenPolyVersion);
int versionInformation = (codeVersion.Version << 12) | bchVersion;
List <bool> versionInfo = BinaryExtensions.DecToBin(versionInformation, 18);
versionInfo.Reverse();
if (this.debugData != null)
{
this.debugData.Append(
"- Yes, writing information: " + BinaryExtensions.BinaryToString(versionInfo) + ".\n");
}
int iterator = 0;
// Version bits at upper right corner
for (int y = 0; y < 6; y++)
{
for (int x = this.picture.GetLength(0) - 8 - 3, j = 0; j < 3; x++, j++)
{
this.picture[x, y] = versionInfo[iterator] ? QrPixel.Black : QrPixel.White;
iterator++;
}
}
iterator = 0;
// Version bits at lower left corner
for (int x = 0; x < 6; x++)
{
for (int y = this.picture.GetLength(0) - 8 - 3, j = 0; j < 3; y++, j++)
{
this.picture[x, y] = versionInfo[iterator] ? QrPixel.Black : QrPixel.White;
iterator++;
}
}
if (this.debugData != null)
{
this.debugData.Append("- Version information bits successfully written.\n");
}
}
if ((this.debugData != null) && (codeVersion.Version < 7))
{
this.debugData.Append("- No, only required for versions higher than 6.\n");
}
}
