Line data    Source code

       1             : /******************************************************************************
       2             :  *
       3             :  * Project:  KmlSuperOverlay
       4             :  * Purpose:  Implements write support for KML superoverlay - KMZ.
       5             :  * Author:   Harsh Govind, harsh.govind@spadac.com
       6             :  *
       7             :  ******************************************************************************
       8             :  * Copyright (c) 2010, SPADAC Inc. <harsh.govind@spadac.com>
       9             :  * Copyright (c) 2012, Even Rouault <even dot rouault at spatialys.com>
      10             :  *
      11             :  * SPDX-License-Identifier: MIT
      12             :  ****************************************************************************/
      13             : 
      14             : #ifndef KMLSUPEROVERLAYDATASET_H_INCLUDED
      15             : #define KMLSUPEROVERLAYDATASET_H_INCLUDED
      16             : 
      17             : #include <array>
      18             : #include <map>
      19             : 
      20             : #include "cpl_minixml.h"
      21             : #include "gdal_pam.h"
      22             : #include "gdal_priv.h"
      23             : 
      24             : /************************************************************************/
      25             : /*                    KmlSuperOverlayReadDataset                        */
      26             : /************************************************************************/
      27             : class KmlSuperOverlayRasterBand;
      28             : class KmlSuperOverlayReadDataset;
      29             : 
      30             : class LinkedDataset;
      31             : 
      32             : class LinkedDataset
      33             : {
      34             :   public:
      35             :     KmlSuperOverlayReadDataset *poDS = nullptr;
      36             :     LinkedDataset *psPrev = nullptr;
      37             :     LinkedDataset *psNext = nullptr;
      38             :     CPLString osSubFilename{};
      39             : 
      40          12 :     LinkedDataset() = default;
      41             : 
      42             :   private:
      43             :     LinkedDataset(const LinkedDataset &) = delete;
      44             :     LinkedDataset &operator=(const LinkedDataset &) = delete;
      45             : };
      46             : 
      47             : class KmlSuperOverlayReadDataset final : public GDALDataset
      48             : {
      49             :     friend class KmlSuperOverlayRasterBand;
      50             : 
      51             :     OGRSpatialReference m_oSRS{};
      52             :     int nFactor = 1;
      53             :     CPLString osFilename{};
      54             :     CPLXMLNode *psRoot = nullptr;
      55             :     CPLXMLNode *psDocument = nullptr;
      56             :     std::unique_ptr<GDALDataset> poDSIcon{};
      57             :     std::array<double, 6> adfGeoTransform = {0, 0, 0, 0, 0, 0};
      58             : 
      59             :     std::vector<std::unique_ptr<KmlSuperOverlayReadDataset>> m_apoOverviewDS{};
      60             :     bool bIsOvr = false;
      61             : 
      62             :     KmlSuperOverlayReadDataset *poParent = nullptr;
      63             : 
      64             :     std::map<CPLString, LinkedDataset *> oMapChildren{};
      65             :     LinkedDataset *psFirstLink = nullptr;
      66             :     LinkedDataset *psLastLink = nullptr;
      67             : 
      68             :     KmlSuperOverlayReadDataset(const KmlSuperOverlayReadDataset &) = delete;
      69             :     KmlSuperOverlayReadDataset &
      70             :     operator=(const KmlSuperOverlayReadDataset &) = delete;
      71             : 
      72             :   protected:
      73             :     virtual int CloseDependentDatasets() override;
      74             : 
      75             :   public:
      76             :     KmlSuperOverlayReadDataset();
      77             :     virtual ~KmlSuperOverlayReadDataset();
      78             : 
      79             :     static int Identify(GDALOpenInfo *);
      80             :     static GDALDataset *Open(const char *pszFilename,
      81             :                              KmlSuperOverlayReadDataset *poParent = nullptr,
      82             :                              int nRec = 0);
      83             :     static GDALDataset *Open(GDALOpenInfo *);
      84             : 
      85             :     static const int KMLSO_ContainsOpaquePixels = 0x1;
      86             :     static const int KMLSO_ContainsTransparentPixels = 0x2;
      87             :     static const int KMLSO_ContainsPartiallyTransparentPixels = 0x4;
      88             : 
      89             :     static int DetectTransparency(int rxsize, int rysize, int rx, int ry,
      90             :                                   int dxsize, int dysize, GDALDataset *poSrcDs);
      91             : 
      92             :     virtual CPLErr GetGeoTransform(double *) override;
      93             :     const OGRSpatialReference *GetSpatialRef() const override;
      94             : 
      95             :     virtual CPLErr IRasterIO(GDALRWFlag eRWFlag, int nXOff, int nYOff,
      96             :                              int nXSize, int nYSize, void *pData, int nBufXSize,
      97             :                              int nBufYSize, GDALDataType eBufType,
      98             :                              int nBandCount, BANDMAP_TYPE panBandMap,
      99             :                              GSpacing nPixelSpace, GSpacing nLineSpace,
     100             :                              GSpacing nBandSpace,
     101             :                              GDALRasterIOExtraArg *psExtraArg) override;
     102             : };
     103             : 
     104             : /************************************************************************/
     105             : /*                     KmlSuperOverlayRasterBand                        */
     106             : /************************************************************************/
     107             : 
     108             : class KmlSuperOverlayRasterBand final : public GDALRasterBand
     109             : {
     110             :   public:
     111             :     KmlSuperOverlayRasterBand(KmlSuperOverlayReadDataset *poDS, int nBand);
     112             : 
     113             :   protected:
     114             :     virtual CPLErr IReadBlock(int, int, void *) override;
     115             :     virtual CPLErr IRasterIO(GDALRWFlag, int, int, int, int, void *, int, int,
     116             :                              GDALDataType, GSpacing nPixelSpace,
     117             :                              GSpacing nLineSpace,
     118             :                              GDALRasterIOExtraArg *psExtraArg) override;
     119             :     virtual GDALColorInterp GetColorInterpretation() override;
     120             : 
     121             :     virtual int GetOverviewCount() override;
     122             :     virtual GDALRasterBand *GetOverview(int) override;
     123             : };
     124             : 
     125             : #endif /* ndef KMLSUPEROVERLAYDATASET_H_INCLUDED */