gxfopen.h

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/******************************************************************************
 * $Id$
 *
 * Project:  GXF Reader
 * Purpose:  GXF-3 access function declarations.
 * Author:   Frank Warmerdam, warmerdam@pobox.com
 *
 ******************************************************************************
 * Copyright (c) 1998, Global Geomatics
 * Copyright (c) 1998, Frank Warmerdam
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included
 * in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
 ****************************************************************************/
 
#ifndef GXFOPEN_H_INCLUDED
#define GXFOPEN_H_INCLUDED
 
/* -------------------------------------------------------------------- */
/*      Include standard portability stuff.                             */
/* -------------------------------------------------------------------- */
#include "cpl_conv.h"
#include "cpl_string.h"
 
CPL_C_START
 
typedef void *GXFHandle;
 
GXFHandle GXFOpen( const char * pszFilename );
 
CPLErr   GXFGetRawInfo( GXFHandle hGXF, int *pnXSize, int *pnYSize,
                        int *pnSense, double * pdfZMin, double * pdfZMax,
                        double * pdfDummy );
CPLErr   GXFGetInfo( GXFHandle hGXF, int *pnXSize, int *pnYSize );
 
CPLErr   GXFGetRawScanline( GXFHandle, int iScanline, double * padfLineBuf );
CPLErr   GXFGetScanline( GXFHandle, int iScanline, double * padfLineBuf );
 
char    **GXFGetMapProjection( GXFHandle );
char    **GXFGetMapDatumTransform( GXFHandle );
char    *GXFGetMapProjectionAsPROJ4( GXFHandle );
char    *GXFGetMapProjectionAsOGCWKT( GXFHandle );
 
CPLErr  GXFGetRawPosition( GXFHandle, double *, double *, double *, double *,
                           double * );
CPLErr  GXFGetPosition( GXFHandle, double *, double *, double *, double *,
                        double * );
 
CPLErr  GXFGetPROJ4Position( GXFHandle, double *, double *, double *, double *,
                             double * );
 
void     GXFClose( GXFHandle hGXF );
 
#define GXFS_LL_UP      -1
#define GXFS_LL_RIGHT   1
#define GXFS_UL_RIGHT   -2
#define GXFS_UL_DOWN    2
#define GXFS_UR_DOWN    -3
#define GXFS_UR_LEFT    3
#define GXFS_LR_LEFT    -4
#define GXFS_LR_UP      4
 
CPL_C_END
 
/* -------------------------------------------------------------------- */
/*      This is consider to be a private structure.                     */
/* -------------------------------------------------------------------- */
typedef struct {
    VSILFILE        *fp;
 
    int         nRawXSize;
    int         nRawYSize;
    int         nSense;         /* GXFS_ codes */
    int         nGType;         /* 0 is uncompressed */
 
    double      dfXPixelSize;
    double      dfYPixelSize;
    double      dfRotation;
    double      dfXOrigin;      /* lower left corner */
    double      dfYOrigin;      /* lower left corner */
 
    char        szDummy[64];
    double      dfSetDummyTo;
 
    char        *pszTitle;
 
    double      dfTransformScale;
    double      dfTransformOffset;
    char        *pszTransformName;
 
    char        **papszMapProjection;
    char        **papszMapDatumTransform;
 
    char        *pszUnitName;
    double      dfUnitToMeter;
 
    double      dfZMaximum;
    double      dfZMinimum;
 
    vsi_l_offset        *panRawLineOffset;
} GXFInfo_t;
 
#endif /* ndef GXFOPEN_H_INCLUDED */