| 48 | |
| 49 | template <class DataType> |
| 50 | static CPLErr GPMaskImageData(GDALRasterBandH hMaskBand, GByte *pabyMaskLine, |
| 51 | int iY, int nXSize, DataType *panImageLine) |
| 52 | |
| 53 | { |
| 54 | const CPLErr eErr = GDALRasterIO(hMaskBand, GF_Read, 0, iY, nXSize, 1, |
| 55 | pabyMaskLine, nXSize, 1, GDT_UInt8, 0, 0); |
| 56 | if (eErr != CE_None) |
| 57 | return eErr; |
| 58 | |
| 59 | for (int i = 0; i < nXSize; i++) |
| 60 | { |
| 61 | if (pabyMaskLine[i] == 0) |
| 62 | panImageLine[i] = GP_NODATA_MARKER; |
| 63 | } |
| 64 | |
| 65 | return CE_None; |
| 66 | } |
| 67 | |
| 68 | /************************************************************************/ |
| 69 | /* GDALPolygonizeT() */ |