public ByteMatrix encode(System.String contents, BarcodeFormat format, int width, int height, System.Collections.Hashtable hints)
{
if (contents == null || contents.Length == 0)
{
throw new System.ArgumentException("Found empty contents");
}
if (format != BarcodeFormat.QR_CODE)
{
throw new System.ArgumentException("Can only encode QR_CODE, but got " + format);
}
if (width < 0 || height < 0)
{
throw new System.ArgumentException("Requested dimensions are too small: " + width + 'x' + height);
}
ErrorCorrectionLevel errorCorrectionLevel = ErrorCorrectionLevel.L;
if (hints != null)
{
ErrorCorrectionLevel requestedECLevel = (ErrorCorrectionLevel) hints[EncodeHintType.ERROR_CORRECTION];
if (requestedECLevel != null)
{
errorCorrectionLevel = requestedECLevel;
}
}
QRCode code = new QRCode();
Encoder.encode(contents, errorCorrectionLevel, hints, code);
return renderResult(code, width, height);
}
// 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)
{
ByteMatrix input = code.Matrix;
int inputWidth = input.Width;
int inputHeight = input.Height;
int qrWidth = inputWidth + (QUIET_ZONE_SIZE << 1);
int qrHeight = inputHeight + (QUIET_ZONE_SIZE << 1);
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;
}
