Beispiel #1
0
        public Bitmap Render(String str)
        {
            Bitmap bitmap = null;

            try
            {
                if (ZBarcode.EncodeAndBuffer(ref SymbolStruct, str, str.Length, this.Rotation) == 0)
                {
                    // no error returned, create barcode preview
                    bitmap = new Bitmap(SymbolStruct.bitmap_width, SymbolStruct.bitmap_height);

                    byte[] bitmapBytes = new byte[SymbolStruct.bitmap_height * SymbolStruct.bitmap_width * 3];
                    Marshal.Copy(SymbolStruct.bitmap, bitmapBytes, 0, bitmapBytes.Length);

                    // write image pixel-by-pixel
                    int row, column, i = 0;
                    int red, blue, green;

                    for (row = 0; row < SymbolStruct.bitmap_height; row++)
                    {
                        for (column = 0; column < SymbolStruct.bitmap_width; column++)
                        {
                            red   = bitmapBytes[i];
                            green = bitmapBytes[i + 1];
                            blue  = bitmapBytes[i + 2];

                            bitmap.SetPixel(column, row, Color.FromArgb(red, green, blue));
                            i += 3;
                        }
                    }

                    // reset bitmap
                    ZBarcode.Clear(ref SymbolStruct);

                    // ZBarcode.Clear() does not do this correctly in DLL, requires doing it manually...
                    SymbolStruct.row_height = null;
                    SymbolStruct.height     = 0;
                }
                else
                {
                    if (SymbolStruct.errtxt == null)
                    {
                        SymbolStruct.errtxt = "error!";
                    }

                    bitmap = WriteErrorImage(SymbolStruct.errtxt);
                }
            }
            catch (Exception e)
            {
                // dll not found, application aborted
                bitmap = WriteErrorImage("Fatal error: a DLL is missing");
            }

            return(bitmap);
        }
Beispiel #2
0
        static Symbology()
        {
            try {
                SymbolStruct = (zint_symbol)

                               // generate managed counterpart of struct
                               Marshal.PtrToStructure(ZBarcode.Create(), typeof(zint_symbol));
            }
            catch (Exception e)
            {
                // dll not found, application aborted
            }
        }