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# gdal_priv.h

    00001 /******************************************************************************
    00002  * $Id: gdal_priv_h-source.html,v 1.4 2000/10/20 20:21:34 warmerda Exp $
    00003  *
    00004  * Name:     gdal_priv.h
    00005  * Project:  GDAL Core
    00006  * Purpose:  GDAL Core C++/Private declarations.
    00007  * Author:   Frank Warmerdam, warmerda@home.com
    00008  *
    00009  ******************************************************************************
    00010  * Copyright (c) 1998, Frank Warmerdam
    00011  *
    00012  * Permission is hereby granted, free of charge, to any person obtaining a
    00013  * copy of this software and associated documentation files (the "Software"),
    00014  * to deal in the Software without restriction, including without limitation
    00015  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
    00016  * and/or sell copies of the Software, and to permit persons to whom the
    00017  * Software is furnished to do so, subject to the following conditions:
    00018  *
    00019  * The above copyright notice and this permission notice shall be included
    00020  * in all copies or substantial portions of the Software.
    00021  *
    00022  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
    00023  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
    00024  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
    00025  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
    00026  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
    00027  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
    00028  * DEALINGS IN THE SOFTWARE.
    00029  ******************************************************************************
    00030  *
    00031  * $Log: gdal_priv_h-source.html,v $
    00031  * Revision 1.4  2000/10/20 20:21:34  warmerda
    00031  * *** empty log message ***
    00031  *
    00032  * Revision 1.22  2000/10/06 15:26:08  warmerda
    00033  * added SetNoDataValue, SetCategoryNames
    00034  *
    00035  * Revision 1.21  2000/07/20 13:38:26  warmerda
    00036  * make GetGDALDriverManager public with CPL_DLL
    00037  *
    00038  * Revision 1.20  2000/04/30 23:22:16  warmerda
    00039  * added CreateCopy support
    00040  *
    00041  * Revision 1.19  2000/04/21 21:55:01  warmerda
    00042  * majorobject updates, and overview building
    00043  *
    00044  * Revision 1.18  2000/04/04 23:44:29  warmerda
    00045  * added AutoLoadDrivers() to GDALDriverManager
    00046  *
    00047  * Revision 1.17  2000/03/31 13:41:24  warmerda
    00048  * added gcps
    00049  *
    00050  * Revision 1.16  2000/03/24 00:09:05  warmerda
    00051  * rewrote cache management
    00052  *
    00053  * Revision 1.15  2000/03/09 23:22:03  warmerda
    00054  * added GetHistogram
    00055  *
    00056  * Revision 1.14  2000/03/06 02:20:35  warmerda
    00057  * added colortables, overviews, etc
    00058  *
    00059  * Revision 1.12  2000/01/31 15:00:25  warmerda
    00060  * added some documentation
    00061  *
    00062  * Revision 1.11  2000/01/31 14:24:36  warmerda
    00063  * implemented dataset delete
    00064  *
    00065  * Revision 1.10  1999/11/11 21:59:07  warmerda
    00066  * added GetDriver() for datasets
    00067  *
    00068  * Revision 1.9  1999/10/21 13:23:45  warmerda
    00069  * Added a bit of driver related documentation.
    00070  *
    00071  * Revision 1.8  1999/10/21 12:04:11  warmerda
    00072  * Reorganized header.
    00073  *
    00074  * Revision 1.7  1999/10/01 14:44:02  warmerda
    00075  * added documentation
    00076  *
    00077  * Revision 1.6  1999/04/21 04:16:25  warmerda
    00078  * experimental docs
    00079  *
    00080  * Revision 1.5  1999/01/11 15:36:18  warmerda
    00081  * Added projections support, and a few other things.
    00082  *
    00083  * Revision 1.4  1998/12/31 18:54:25  warmerda
    00084  * Implement initial GDALRasterBlock support, and block cache
    00085  *
    00086  * Revision 1.3  1998/12/06 22:17:09  warmerda
    00087  * Fill out rasterio support.
    00088  *
    00089  * Revision 1.2  1998/12/03 18:34:06  warmerda
    00090  * Update to use CPL
    00091  *
    00092  * Revision 1.1  1998/10/18 06:15:11  warmerda
    00093  * Initial implementation.
    00094  *
    00095  */
    00096
    00097 #ifndef GDAL_PRIV_H_INCLUDED
    00098 #define GDAL_PRIV_H_INCLUDED
    00099
    00100 /* -------------------------------------------------------------------- */
    00101 /*      Predeclare various classes before pulling in gdal.h, the        */
    00102 /*      public declarations.                                            */
    00103 /* -------------------------------------------------------------------- */
    00104 class GDALMajorObject;
    00105 class GDALDataset;
    00106 class GDALRasterBand;
    00107 class GDALDriver;
    00108
    00109 /* -------------------------------------------------------------------- */
    00110 /*      Pull in the public declarations.  This gets the C apis, and     */
    00111 /*      also various constants.  However, we will still get to          */
    00112 /*      provide the real class definitions for the GDAL classes.        */
    00113 /* -------------------------------------------------------------------- */
    00114
    00115 #include "gdal.h"
    00116 #include "cpl_vsi.h"
    00117 #include "cpl_conv.h"
    00118
    00119 /* ******************************************************************** */
    00120 /*                           GDALMajorObject                            */
    00121 /*                                                                      */
    00122 /*      Base class providing metadata, description and other            */
    00123 /*      services shared by major objects.                               */
    00124 /* ******************************************************************** */
    00125
    00126 class CPL_DLL GDALMajorObject
    00127 {
    00128   protected:
    00129     char             *pszDescription;
    00130     char            **papszMetadata;
    00131
    00132   public:
    00133                         GDALMajorObject();
    00134     virtual            ~GDALMajorObject();
    00135
    00136     const char *        GetDescription() const;
    00137     void                SetDescription( const char * );
    00138
    00139     virtual char      **GetMetadata( const char * pszDomain = "" );
    00140     virtual CPLErr      SetMetadata( char ** papszMetadata,
    00141                                      const char * pszDomain = "" );
    00142     virtual const char *GetMetadataItem( const char * pszName,
    00143                                          const char * pszDomain = "" );
    00144     virtual CPLErr      SetMetadataItem( const char * pszName,
    00145                                          const char * pszValue,
    00146                                          const char * pszDomain = "" );
    00147 };
    00148
    00149 /* ******************************************************************** */
    00150 /*                             GDALProjDef                              */
    00151 /* ******************************************************************** */
    00152
    00154
    00155 class CPL_DLL GDALProjDef
    00156 {
    00157     void        *psPJ;
    00158
    00159     char        *pszProjection;
    00160
    00161   public:
    00162                 GDALProjDef( const char * = NULL );
    00163                 ~GDALProjDef();
    00164
    00165     CPLErr      ToLongLat( double * padfX, double * padfY );
    00166     CPLErr      FromLongLat( double * padfX, double * padfY );
    00167
    00168     const char  *GetProjectionString( void ) { return pszProjection; }
    00169     CPLErr      SetProjectionString( const char * );
    00170 };
    00171
    00172 /* ******************************************************************** */
    00173 /*                         GDALDefaultOverviews                         */
    00174 /* ******************************************************************** */
    00175 class GDALDefaultOverviews
    00176 {
    00177     GDALDataset *poDS;
    00178     GDALDataset *poODS;
    00179
    00180   public:
    00181                GDALDefaultOverviews();
    00182                ~GDALDefaultOverviews();
    00183
    00184     void       Initialize( GDALDataset *, const char * = NULL );
    00185     int        IsInitialized() { return poDS != NULL; }
    00186
    00187     int        GetOverviewCount(int);
    00188     GDALRasterBand *GetOverview(int,int);
    00189
    00190     CPLErr     BuildOverviews( const char * pszBasename,
    00191                                const char * pszResampling,
    00192                                int nOverviews, int * panOverviewList,
    00193                                int nBands, int * panBandList,
    00194                                GDALProgressFunc pfnProgress,
    00195                                void *pProgressData );
    00196 };
    00197
    00198 /* ******************************************************************** */
    00199 /*                             GDALDataset                              */
    00200 /* ******************************************************************** */
    00201
    00208 class CPL_DLL GDALDataset : public GDALMajorObject
    00209 {
    00210     friend GDALDatasetH GDALOpen( const char *, GDALAccess);
    00211
    00212   protected:
    00213     GDALDriver  *poDriver;
    00214     GDALAccess  eAccess;
    00215
    00216     // Stored raster information.
    00217     int         nRasterXSize;
    00218     int         nRasterYSize;
    00219     int         nBands;
    00220     GDALRasterBand **papoBands;
    00221
    00222     int         nRefCount;
    00223
    00224                 GDALDataset(void);
    00225     void        RasterInitialize( int, int );
    00226     void        SetBand( int, GDALRasterBand * );
    00227
    00228     GDALDefaultOverviews oOvManager;
    00229
    00230     virtual CPLErr IBuildOverviews( const char *, int, int *,
    00231                                     int, int *, GDALProgressFunc, void * );
    00232
    00233     friend class GDALRasterBand;
    00234
    00235   public:
    00236     virtual     ~GDALDataset();
    00237
    00238     int         GetRasterXSize( void );
    00239     int         GetRasterYSize( void );
    00240     int         GetRasterCount( void );
    00241     GDALRasterBand *GetRasterBand( int );
    00242
    00243     virtual void FlushCache(void);
    00244
    00245     virtual const char *GetProjectionRef(void);
    00246     virtual CPLErr SetProjection( const char * );
    00247
    00248     virtual CPLErr GetGeoTransform( double * );
    00249     virtual CPLErr SetGeoTransform( double * );
    00250
    00251     virtual void *GetInternalHandle( const char * );
    00252     virtual GDALDriver *GetDriver(void);
    00253
    00254     virtual int    GetGCPCount();
    00255     virtual const char *GetGCPProjection();
    00256     virtual const GDAL_GCP *GetGCPs();
    00257
    00258     int           Reference();
    00259     int           Dereference();
    00260     GDALAccess    GetAccess() { return eAccess; }
    00261
    00262     CPLErr BuildOverviews( const char *, int, int *,
    00263                            int, int *, GDALProgressFunc, void * );
    00264 };
    00265
    00266 /* ******************************************************************** */
    00267 /*                           GDALRasterBlock                            */
    00268 /* ******************************************************************** */
    00269
    00272 class CPL_DLL GDALRasterBlock
    00273 {
    00274     GDALDataType        eType;
    00275
    00276     int                 nAge;
    00277     int                 bDirty;
    00278
    00279     int                 nXOff;
    00280     int                 nYOff;
    00281
    00282     int                 nXSize;
    00283     int                 nYSize;
    00284
    00285     void                *pData;
    00286
    00287     GDALRasterBand      *poBand;
    00288
    00289     GDALRasterBlock     *poNext;
    00290     GDALRasterBlock     *poPrevious;
    00291
    00292   public:
    00293                 GDALRasterBlock( GDALRasterBand *, int, int );
    00294     virtual     ~GDALRasterBlock();
    00295
    00296     CPLErr      Internalize( void );    /* make copy of data */
    00297     void        Touch( void );          /* update age */
    00298     void        MarkDirty( void );      /* data has been modified since read */
    00299     void        MarkClean( void );
    00300
    00301     CPLErr      Write();
    00302
    00303     GDALDataType GetDataType() { return eType; }
    00304     int         GetXOff() { return nXOff; }
    00305     int         GetYOff() { return nYOff; }
    00306     int         GetXSize() { return nXSize; }
    00307     int         GetYSize() { return nYSize; }
    00308     int         GetAge() { return nAge; }
    00309     int         GetDirty() { return bDirty; }
    00310
    00311     void        *GetDataRef( void ) { return pData; }
    00312
    00313     GDALRasterBand *GetBand() { return poBand; }
    00314
    00315     static void FlushOldestBlock();
    00316     static void Verify();
    00317
    00318 };
    00319
    00320
    00321 /* ******************************************************************** */
    00322 /*                             GDALColorTable                           */
    00323 /* ******************************************************************** */
    00324
    00325 class CPL_DLL GDALColorTable
    00326 {
    00327     GDALPaletteInterp eInterp;
    00328
    00329     int         nEntryCount;
    00330     GDALColorEntry *paoEntries;
    00331
    00332 public:
    00333                 GDALColorTable( GDALPaletteInterp = GPI_RGB );
    00334                 ~GDALColorTable();
    00335
    00336     GDALColorTable *Clone() const;
    00337
    00338     GDALPaletteInterp GetPaletteInterpretation() const;
    00339
    00340     int           GetColorEntryCount() const;
    00341     const GDALColorEntry *GetColorEntry( int ) const;
    00342     int           GetColorEntryAsRGB( int, GDALColorEntry * ) const;
    00343     void          SetColorEntry( int, const GDALColorEntry * );
    00344 };
    00345
    00346 /* ******************************************************************** */
    00347 /*                            GDALRasterBand                            */
    00348 /* ******************************************************************** */
    00349
    00351
    00352 class CPL_DLL GDALRasterBand : public GDALMajorObject
    00353 {
    00354   protected:
    00355     GDALDataset *poDS;
    00356     int         nBand; /* 1 based */
    00357
    00358     int         nRasterXSize;
    00359     int         nRasterYSize;
    00360
    00361     GDALDataType eDataType;
    00362     GDALAccess  eAccess;
    00363
    00364     /* stuff related to blocking, and raster cache */
    00365     int         nBlockXSize;
    00366     int         nBlockYSize;
    00367     int         nBlocksPerRow;
    00368     int         nBlocksPerColumn;
    00369
    00370     GDALRasterBlock **papoBlocks;
    00371
    00372     friend class GDALDataset;
    00373     friend class GDALRasterBlock;
    00374
    00375   protected:
    00376     virtual CPLErr IReadBlock( int, int, void * ) = 0;
    00377     virtual CPLErr IWriteBlock( int, int, void * );
    00378     virtual CPLErr IRasterIO( GDALRWFlag, int, int, int, int,
    00379                               void *, int, int, GDALDataType,
    00380                               int, int );
    00381     CPLErr         OverviewRasterIO( GDALRWFlag, int, int, int, int,
    00382                                      void *, int, int, GDALDataType,
    00383                                      int, int );
    00384
    00385     CPLErr         AdoptBlock( int, int, GDALRasterBlock * );
    00386     void           InitBlockInfo();
    00387
    00388   public:
    00389                 GDALRasterBand();
    00390
    00391     virtual     ~GDALRasterBand();
    00392
    00393     int         GetXSize();
    00394     int         GetYSize();
    00395
    00396     GDALDataType GetRasterDataType( void );
    00397     void        GetBlockSize( int *, int * );
    00398     GDALAccess  GetAccess();
    00399
    00400     CPLErr      RasterIO( GDALRWFlag, int, int, int, int,
    00401                           void *, int, int, GDALDataType,
    00402                           int, int );
    00403     CPLErr      ReadBlock( int, int, void * );
    00404
    00405     CPLErr      WriteBlock( int, int, void * );
    00406
    00407     GDALRasterBlock *GetBlockRef( int, int );
    00408     CPLErr      FlushCache();
    00409     CPLErr      FlushBlock( int = -1, int = -1 );
    00410
    00411     // New OpengIS CV_SampleDimension stuff.
    00412
    00413     virtual const char  *GetDescription();
    00414     virtual char **GetCategoryNames();
    00415     virtual double GetNoDataValue( int *pbSuccess = NULL );
    00416     virtual double GetMinimum( int *pbSuccess = NULL );
    00417     virtual double GetMaximum(int *pbSuccess = NULL );
    00418     virtual double GetOffset( int *pbSuccess = NULL );
    00419     virtual double GetScale( int *pbSuccess = NULL );
    00420     virtual const char *GetUnitType();
    00421     virtual GDALColorInterp GetColorInterpretation();
    00422     virtual GDALColorTable *GetColorTable();
    00423
    00424     virtual CPLErr SetCategoryNames( char ** );
    00425     virtual CPLErr SetNoDataValue( double );
    00426     virtual CPLErr SetColorTable( GDALColorTable * );
    00427
    00428     virtual int HasArbitraryOverviews();
    00429     virtual int GetOverviewCount();
    00430     virtual GDALRasterBand *GetOverview(int);
    00431     virtual CPLErr BuildOverviews( const char *, int, int *,
    00432                                    GDALProgressFunc, void * );
    00433
    00434     CPLErr  GetHistogram( double dfMin, double dfMax,
    00435                           int nBuckets, int * panHistogram,
    00436                           int bIncludeOutOfRange, int bApproxOK,
    00437                           GDALProgressFunc, void *pProgressData );
    00438 };
    00439
    00440 /* ******************************************************************** */
    00441 /*                             GDALOpenInfo                             */
    00442 /*                                                                      */
    00443 /*      Structure of data about dataset for open functions.             */
    00444 /* ******************************************************************** */
    00445
    00446 class CPL_DLL GDALOpenInfo
    00447 {
    00448   public:
    00449
    00450                 GDALOpenInfo( const char * pszFile, GDALAccess eAccessIn );
    00451                 ~GDALOpenInfo( void );
    00452
    00453     char        *pszFilename;
    00454
    00455     GDALAccess  eAccess;
    00456
    00457     GBool       bStatOK;
    00458     VSIStatBuf  sStat;
    00459
    00460     FILE        *fp;
    00461
    00462     int         nHeaderBytes;
    00463     GByte       *pabyHeader;
    00464
    00465 };
    00466
    00467 /* ******************************************************************** */
    00468 /*                              GDALDriver                              */
    00469 /* ******************************************************************** */
    00470
    00480 class CPL_DLL GDALDriver : public GDALMajorObject
    00481 {
    00482   public:
    00483                         GDALDriver();
    00484                         ~GDALDriver();
    00485
    00487     char                *pszShortName;
    00488
    00490     char                *pszLongName;
    00491
    00493     char                *pszHelpTopic;
    00494
    00495     GDALDataset         *(*pfnOpen)( GDALOpenInfo * );
    00496
    00497     GDALDataset         *(*pfnCreate)( const char * pszName,
    00498                                        int nXSize, int nYSize, int nBands,
    00499                                        GDALDataType eType,
    00500                                        char ** papszOptions );
    00501
    00502     GDALDataset         *Create( const char * pszName,
    00503                                  int nXSize, int nYSize, int nBands,
    00504                                  GDALDataType eType, char ** papszOptions );
    00505
    00506     CPLErr              (*pfnDelete)( const char * pszName );
    00507
    00508     CPLErr              Delete( const char * pszName );
    00509
    00510     GDALDataset         *CreateCopy( const char *, GDALDataset *,
    00511                                      int, char **,
    00512                                      GDALProgressFunc pfnProgress,
    00513                                      void * pProgressData );
    00514
    00515     GDALDataset         *(*pfnCreateCopy)( const char *, GDALDataset *,
    00516                                            int, char **,
    00517                                            GDALProgressFunc pfnProgress,
    00518                                            void * pProgressData );
    00519 };
    00520
    00521 /* ******************************************************************** */
    00522 /*                          GDALDriverManager                           */
    00523 /* ******************************************************************** */
    00524
    00532 class CPL_DLL GDALDriverManager : public GDALMajorObject
    00533 {
    00534     int         nDrivers;
    00535     GDALDriver  **papoDrivers;
    00536
    00537     char        *pszHome;
    00538
    00539  public:
    00540                 GDALDriverManager();
    00541                 ~GDALDriverManager();
    00542
    00543     int         GetDriverCount( void );
    00544     GDALDriver  *GetDriver( int );
    00545     GDALDriver  *GetDriverByName( const char * );
    00546
    00547     int         RegisterDriver( GDALDriver * );
    00548     void        MoveDriver( GDALDriver *, int );
    00549     void        DeregisterDriver( GDALDriver * );
    00550
    00551     void        AutoLoadDrivers();
    00552
    00553     const char *GetHome();
    00554     void        SetHome( const char * );
    00555 };
    00556
    00557 CPL_C_START
    00558 GDALDriverManager CPL_DLL * GetGDALDriverManager( void );
    00559 CPL_C_END
    00560
    00561 /* ==================================================================== */
    00562 /*      An assortment of overview related stuff.                        */
    00563 /* ==================================================================== */
    00564
    00565 CPL_C_START
    00566
    00567 CPLErr
    00568 GTIFFBuildOverviews( const char * pszFilename,
    00569                      int nBands, GDALRasterBand **papoBandList,
    00570                      int nOverviews, int * panOverviewList,
    00571                      const char * pszResampling,
    00572                      GDALProgressFunc pfnProgress, void * pProgressData );
    00573
    00574 CPLErr
    00575 GDALDefaultBuildOverviews( GDALDataset *hSrcDS, const char * pszBasename,
    00576                            const char * pszResampling,
    00577                            int nOverviews, int * panOverviewList,
    00578                            int nBands, int * panBandList,
    00579                            GDALProgressFunc pfnProgress, void * pProgressData);
    00580
    00581
    00582 CPLErr
    00583 GDALRegenerateOverviews( GDALRasterBand *, int, GDALRasterBand **,
    00584                          const char *, GDALProgressFunc, void * );
    00585
    00586 CPL_C_END
    00587
    00588 #endif /* ndef GDAL_PRIV_H_INCLUDED */