Documentation for properties in dmtxDecodeSetProp

[jstmn]

Hi There,

I haven't been able to find any documentation on what the properties in dmtxDecodeSetProp() do. Could you please share what they mean? For refererence, I know that there is a roughly 35x30 px datamatrix somewhere in the image. If I could pass this information along hopefully it can substantially speed up the scan.

   switch(prop) {
      case DmtxPropEdgeMin:
         dec->edgeMin = value;
         break;
      case DmtxPropEdgeMax:
         dec->edgeMax = value;
         break;
      case DmtxPropScanGap:
         dec->scanGap = value; /* XXX Should this be scaled? */
         break;
      case DmtxPropFnc1:
         dec->fnc1 = value;
         break;
      case DmtxPropSquareDevn:
         dec->squareDevn = cos(value * (M_PI/180.0));
         break;
      case DmtxPropSymbolSize:
         dec->sizeIdxExpected = value;
         break;
      case DmtxPropEdgeThresh:
         dec->edgeThresh = value;
         break;
      /* Min and Max values arrive unscaled */
      case DmtxPropXmin:
         dec->xMin = value / dec->scale;
         break;
      case DmtxPropXmax:
         dec->xMax = value / dec->scale;
         break;
      case DmtxPropYmin:
         dec->yMin = value / dec->scale;
         break;
      case DmtxPropYmax:
         dec->yMax = value / dec->scale;
         break;
      default:
         break;
   }

Cheers

[msva]

As far as I can see, most of props allows you to advice scanner about the coordinates of matrix, and some metainformation about matrix itself.
And their names mostly describes their purpose, IMO.