/// <summary>
/// Renders the specified matrix to its graphically representation
/// </summary>
/// <param name="matrix">The matrix.</param>
/// <param name="format">The format.</param>
/// <param name="content">The encoded content of the barcode which should be included in the image.
/// That can be the numbers below a 1D barcode or something other.</param>
/// <param name="options">The options.</param>
/// <param name="textualInformation">Textual information associated with the image</param>
/// <returns>Stream containing a png image</returns>
public Stream Render(BitMatrix matrix, BarcodeFormat format, string content, EncodingOptions options, TextualInformation?textualInformation)
{
var includeText = !string.IsNullOrEmpty(content) && !(options?.PureBarcode ?? true);
var width = matrix.Width;
if (includeText)
{
var requiredWidth = PngImageTextWriter.GetRequiredWidth(content);
width = Math.Max(width, requiredWidth);
}
using var pngImageWriter = new PngImageWriter(width, matrix.Height, textualInformation);
var previousScanLine = Span <byte> .Empty;
for (int y = 0; y < matrix.Height; y++)
{
var bitArray = matrix.getRow(y, null);
var currentScanLine = bitArray.GetBytes();
currentScanLine.Negate();
currentScanLine.ReverseBits();
pngImageWriter.WriteLine(currentScanLine, previousScanLine);
previousScanLine = currentScanLine;
}
if (includeText)
{
PngImageTextWriter.Write(pngImageWriter, content);
}
pngImageWriter.Finish();
return(pngImageWriter.Stream);
}
/// <summary>
/// Writes <paramref name="text"/> to the supplied <paramref name="pngImageWriter"/>
/// Will write over white space if available
/// </summary>
/// <param name="pngImageWriter"></param>
/// <param name="text"></param>
public static void Write(PngImageWriter pngImageWriter, string text)
{
pngImageWriter.EnsureBlankScanLines(13);
pngImageWriter.WriteLine();
var textLen = text.Length;
Span <byte> row = stackalloc byte[textLen * 11];
row.Fill(byte.MaxValue);
for (int c = 0; c < text.Length; c++)
{
if (characterBitmaps.TryGetValue(text[c], out var charBitmap))
{
for (int y = 0; y < 11; y++)
{
row[(y * textLen) + c] = charBitmap[y];
}
}
}
for (int i = 0; i < 11; i++)
{
pngImageWriter.WriteLine(row.Slice(textLen * i, textLen));
}
pngImageWriter.WriteLine();
}
