Esempio n. 1
0
        internal DmtxScanGrid(DmtxDecode dec)
        {
            int scale = dec.Scale;
            int smallestFeature = dec.ScanGap;
            this._xMin = dec.XMin;
            this._xMax = dec.XMax;
            this._yMin = dec.YMin;
            this._yMax = dec.YMax;

            /* Values that get set once */
            int xExtent = this._xMax - this._xMin;
            int yExtent = this._yMax - this._yMin;
            int maxExtent = (xExtent > yExtent) ? xExtent : yExtent;

            if (maxExtent < 1)
            {
                throw new ArgumentException("Invalid max extent for Scan Grid: Must be greater than 0");
            }

            int extent = 1;
            this._minExtent = extent;
            for (; extent < maxExtent; extent = ((extent + 1) * 2) - 1)
            {
                if (extent <= smallestFeature)
                {
                    _minExtent = extent;
                }
            }

            this._maxExtent = extent ;

            this._xOffset = (this._xMin + this._xMax - this._maxExtent) / 2;
            this._yOffset = (this._yMin + this._yMax - this._maxExtent) / 2;

            /* Values that get reset for every level */
            this._total = 1;
            this._extent = this._maxExtent;

            this._jumpSize = this._extent + 1;
            this._pixelTotal = 2 * this._extent - 1;
            this._startPos = this._extent / 2;
            this._pixelCount = 0;
            this._xCenter = this._yCenter = this._startPos;

            SetDerivedFields();
        }
Esempio n. 2
0
 private List<string> DecodeImage(Bitmap image, int maxResultCount, TimeSpan timeOut, bool isMosaic)
 {
     List<string> result = new List<string>();
     int stride;
     byte[] rawImg = ImageToByteArray(image, out stride);
     DmtxImage dmtxImg = new DmtxImage(rawImg, image.Width, image.Height, DmtxPackOrder.DmtxPack24bppRGB);
     dmtxImg.RowPadBytes = stride % 3;
     DmtxDecode decode = new DmtxDecode(dmtxImg, 1);
     TimeSpan timeLeft = new TimeSpan(timeOut.Ticks);
     Stopwatch stopWatch = new Stopwatch();
     stopWatch.Start();
     while (true)
     {
         if (stopWatch.Elapsed > timeOut)
         {
             break;
         }
         DmtxRegion region = decode.RegionFindNext(timeOut);
         if (region != null)
         {
             DmtxMessage msg = isMosaic ? decode.MosaicRegion(region, -1) : decode.MatrixRegion(region, -1);
             string message = Encoding.ASCII.GetString(msg.Output);
             message = message.Substring(0, message.IndexOf('\0'));
             if (!result.Contains(message))
             {
                 result.Add(message);
                 if (result.Count >= maxResultCount)
                 {
                     break;
                 }
             }
         }
         else
         {
             break;
         }
     }
     return result;
 }