CSJ2K.j2k.codestream.reader.HeaderDecoder.readRGN C# (CSharp) Method

        private void readRGN(System.IO.BinaryReader ehs, bool mainh, int tileIdx, int tpIdx)
        {
            int comp; // ROI component
            //int i; // loop variable
            //int tempComp; // Component for
            HeaderInfo.RGN ms = hi.NewRGN;

            // Lrgn (marker length)
            ms.lrgn = ehs.ReadUInt16();

            // Read component
            ms.crgn = comp = (nComp < 257)?ehs.ReadByte():ehs.ReadUInt16();
            if (comp >= nComp)
            {
                throw new CorruptedCodestreamException("Invalid component " + "index in RGN marker" + comp);
            }

            // Read type of RGN.(Srgn)
            ms.srgn = ehs.ReadByte();

            // Check that we can handle it.
            if (ms.srgn != CSJ2K.j2k.codestream.Markers.SRGN_IMPLICIT)
                throw new CorruptedCodestreamException("Unknown or unsupported " + "Srgn parameter in ROI " + "marker");

            if (decSpec.rois == null)
            {
                // No maxshift spec defined
                // Create needed ModuleSpec
                decSpec.rois = new MaxShiftSpec(nTiles, nComp, ModuleSpec.SPEC_TYPE_TILE_COMP);
            }

            // SPrgn
            ms.sprgn = ehs.ReadByte();

            if (mainh)
            {
                hi.rgnValue["main_c" + comp] = ms;
                decSpec.rois.setCompDef(comp, (System.Object) ms.sprgn);
            }
            else
            {
                hi.rgnValue["t" + tileIdx + "_c" + comp] = ms;
                decSpec.rois.setTileCompVal(tileIdx, comp, (System.Object) ms.sprgn);
            }

            // Check marker length
            checkMarkerLength(ehs, "RGN marker");
        }