using System;
using System.Drawing;
using System.Diagnostics;
namespace GenCode128
{
/// <summary>
/// Summary description for Code128Rendering.
/// </summary>
public static class Code128Rendering
{
#region Code patterns
// in principle these rows should each have 6 elements
// however, the last one -- STOP -- has 7. The cost of the
// extra integers is trivial, and this lets the code flow
// much more elegantly
private static readonly int[,] cPatterns =
{
{2,1,2,2,2,2,0,0}, // 0
{2,2,2,1,2,2,0,0}, // 1
{2,2,2,2,2,1,0,0}, // 2
{1,2,1,2,2,3,0,0}, // 3
{1,2,1,3,2,2,0,0}, // 4
{1,3,1,2,2,2,0,0}, // 5
{1,2,2,2,1,3,0,0}, // 6
{1,2,2,3,1,2,0,0}, // 7
{1,3,2,2,1,2,0,0}, // 8
{2,2,1,2,1,3,0,0}, // 9
{2,2,1,3,1,2,0,0}, // 10
{2,3,1,2,1,2,0,0}, // 11
{1,1,2,2,3,2,0,0}, // 12
{1,2,2,1,3,2,0,0}, // 13
{1,2,2,2,3,1,0,0}, // 14
{1,1,3,2,2,2,0,0}, // 15
{1,2,3,1,2,2,0,0}, // 16
{1,2,3,2,2,1,0,0}, // 17
{2,2,3,2,1,1,0,0}, // 18
{2,2,1,1,3,2,0,0}, // 19
{2,2,1,2,3,1,0,0}, // 20
{2,1,3,2,1,2,0,0}, // 21
{2,2,3,1,1,2,0,0}, // 22
{3,1,2,1,3,1,0,0}, // 23
{3,1,1,2,2,2,0,0}, // 24
{3,2,1,1,2,2,0,0}, // 25
{3,2,1,2,2,1,0,0}, // 26
{3,1,2,2,1,2,0,0}, // 27
{3,2,2,1,1,2,0,0}, // 28
{3,2,2,2,1,1,0,0}, // 29
{2,1,2,1,2,3,0,0}, // 30
{2,1,2,3,2,1,0,0}, // 31
{2,3,2,1,2,1,0,0}, // 32
{1,1,1,3,2,3,0,0}, // 33
{1,3,1,1,2,3,0,0}, // 34
{1,3,1,3,2,1,0,0}, // 35
{1,1,2,3,1,3,0,0}, // 36
{1,3,2,1,1,3,0,0}, // 37
{1,3,2,3,1,1,0,0}, // 38
{2,1,1,3,1,3,0,0}, // 39
{2,3,1,1,1,3,0,0}, // 40
{2,3,1,3,1,1,0,0}, // 41
{1,1,2,1,3,3,0,0}, // 42
{1,1,2,3,3,1,0,0}, // 43
{1,3,2,1,3,1,0,0}, // 44
{1,1,3,1,2,3,0,0}, // 45
{1,1,3,3,2,1,0,0}, // 46
{1,3,3,1,2,1,0,0}, // 47
{3,1,3,1,2,1,0,0}, // 48
{2,1,1,3,3,1,0,0}, // 49
{2,3,1,1,3,1,0,0}, // 50
{2,1,3,1,1,3,0,0}, // 51
{2,1,3,3,1,1,0,0}, // 52
{2,1,3,1,3,1,0,0}, // 53
{3,1,1,1,2,3,0,0}, // 54
{3,1,1,3,2,1,0,0}, // 55
{3,3,1,1,2,1,0,0}, // 56
{3,1,2,1,1,3,0,0}, // 57
{3,1,2,3,1,1,0,0}, // 58
{3,3,2,1,1,1,0,0}, // 59
{3,1,4,1,1,1,0,0}, // 60
{2,2,1,4,1,1,0,0}, // 61
{4,3,1,1,1,1,0,0}, // 62
{1,1,1,2,2,4,0,0}, // 63
{1,1,1,4,2,2,0,0}, // 64
{1,2,1,1,2,4,0,0}, // 65
{1,2,1,4,2,1,0,0}, // 66
{1,4,1,1,2,2,0,0}, // 67
{1,4,1,2,2,1,0,0}, // 68
{1,1,2,2,1,4,0,0}, // 69
{1,1,2,4,1,2,0,0}, // 70
{1,2,2,1,1,4,0,0}, // 71
{1,2,2,4,1,1,0,0}, // 72
{1,4,2,1,1,2,0,0}, // 73
{1,4,2,2,1,1,0,0}, // 74
{2,4,1,2,1,1,0,0}, // 75
{2,2,1,1,1,4,0,0}, // 76
{4,1,3,1,1,1,0,0}, // 77
{2,4,1,1,1,2,0,0}, // 78
{1,3,4,1,1,1,0,0}, // 79
{1,1,1,2,4,2,0,0}, // 80
{1,2,1,1,4,2,0,0}, // 81
{1,2,1,2,4,1,0,0}, // 82
{1,1,4,2,1,2,0,0}, // 83
{1,2,4,1,1,2,0,0}, // 84
{1,2,4,2,1,1,0,0}, // 85
{4,1,1,2,1,2,0,0}, // 86
{4,2,1,1,1,2,0,0}, // 87
{4,2,1,2,1,1,0,0}, // 88
{2,1,2,1,4,1,0,0}, // 89
{2,1,4,1,2,1,0,0}, // 90
{4,1,2,1,2,1,0,0}, // 91
{1,1,1,1,4,3,0,0}, // 92
{1,1,1,3,4,1,0,0}, // 93
{1,3,1,1,4,1,0,0}, // 94
{1,1,4,1,1,3,0,0}, // 95
{1,1,4,3,1,1,0,0}, // 96
{4,1,1,1,1,3,0,0}, // 97
{4,1,1,3,1,1,0,0}, // 98
{1,1,3,1,4,1,0,0}, // 99
{1,1,4,1,3,1,0,0}, // 100
{3,1,1,1,4,1,0,0}, // 101
{4,1,1,1,3,1,0,0}, // 102
{2,1,1,4,1,2,0,0}, // 103
{2,1,1,2,1,4,0,0}, // 104
{2,1,1,2,3,2,0,0}, // 105
{2,3,3,1,1,1,2,0} // 106
};
#endregion Code patterns
private const int cQuietWidth = 10;
/// <summary>
/// Make an image of a Code128 barcode for a given string
/// </summary>
/// <param name="InputData">Message to be encoded</param>
/// <param name="BarWeight">Base thickness for bar width (1 or 2 works well)</param>
/// <param name="AddQuietZone">Add required horiz margins (use if output is tight)</param>
/// <returns>An Image of the Code128 barcode representing the message</returns>
public static Image MakeBarcodeImage( string InputData, int BarWeight, bool AddQuietZone )
{
// get the Code128 codes to represent the message
Code128Content content = new Code128Content( InputData );
int[] codes = content.Codes;
int width, height;
width = ( (codes.Length-3) * 11 + 35) * BarWeight;
height = Convert.ToInt32( System.Math.Ceiling( Convert.ToSingle(width) * .15F) );
if (AddQuietZone)
{
width += 2 * cQuietWidth * BarWeight; // on both sides
}
// get surface to draw on
Image myimg = new System.Drawing.Bitmap(width, height);
using (Graphics gr = Graphics.FromImage(myimg))
{
// set to white so we don't have to fill the spaces with white
gr.FillRectangle(System.Drawing.Brushes.White, 0, 0, width, height);
// skip quiet zone
int cursor = AddQuietZone ? cQuietWidth * BarWeight : 0;
for (int codeidx = 0; codeidx < codes.Length; codeidx++)
{
int code = codes[codeidx];
// take the bars two at a time: a black and a white
for (int bar = 0; bar < 8; bar += 2)
{
int barwidth = cPatterns[code, bar] * BarWeight;
int spcwidth = cPatterns[code, bar + 1] * BarWeight;
// if width is zero, don't try to draw it
if (barwidth > 0)
{
gr.FillRectangle(System.Drawing.Brushes.Black, cursor, 0, barwidth, height);
}
// note that we never need to draw the space, since we
// initialized the graphics to all white
// advance cursor beyond this pair
cursor += (barwidth + spcwidth);
}
}
}
return myimg;
}
}
}
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