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/******************************************************************************
* $Id$
*
* Project: Arc/Info Binary Grid Translator
* Purpose: Grid file access include file.
* Author: Frank Warmerdam, warmerdam@pobox.com
*
******************************************************************************
* Copyright (c) 1999, 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 AIGRID_H_INCLUDED
#define AIGRID_H_INCLUDED
#include "cpl_conv.h"
CPL_C_START
#define ESRI_GRID_NO_DATA -2147483647
/*#define ESRI_GRID_FLOAT_NO_DATA -340282306073709652508363335590014353408.0 */
#define ESRI_GRID_FLOAT_NO_DATA -340282346638528859811704183484516925440.0
/* ==================================================================== */
/* Grid Instance */
/* ==================================================================== */
typedef struct
{
int nBlocks;
GUInt32 *panBlockOffset;
int *panBlockSize;
VSILFILE *fpGrid; // The w001001.adf file.
int bTriedToLoad;
} AIGTileInfo;
typedef struct
{
/* Private information */
AIGTileInfo *pasTileInfo;
int bHasWarned;
int nFailedOpenings;
/* public information */
char *pszCoverName; // Path of coverage directory.
GInt32 nCellType;
GInt32 bCompressed;
#define AIG_CELLTYPE_INT 1
#define AIG_CELLTYPE_FLOAT 2
GInt32 nBlockXSize;
GInt32 nBlockYSize;
GInt32 nBlocksPerRow;
GInt32 nBlocksPerColumn;
int nTileXSize;
int nTileYSize;
int nTilesPerRow;
int nTilesPerColumn;
double dfLLX;
double dfLLY;
double dfURX;
double dfURY;
double dfCellSizeX;
double dfCellSizeY;
int nPixels;
int nLines;
double dfMin;
double dfMax;
double dfMean;
double dfStdDev;
} AIGInfo_t;
/* ==================================================================== */
/* Private APIs */
/* ==================================================================== */
CPLErr AIGAccessTile(AIGInfo_t *psInfo, int iTileX, int iTileY);
CPLErr AIGReadBlock(VSILFILE *fp, GUInt32 nBlockOffset, int nBlockSize,
int nBlockXSize, int nBlockYSize, GInt32 *panData,
int nCellType, int bCompressed);
CPLErr AIGReadHeader(const char *, AIGInfo_t *);
CPLErr AIGReadBlockIndex(AIGInfo_t *, AIGTileInfo *, const char *pszBasename);
CPLErr AIGReadBounds(const char *, AIGInfo_t *);
CPLErr AIGReadStatistics(const char *, AIGInfo_t *);
CPLErr DecompressCCITTRLETile(unsigned char *pabySrcData, int nSrcBytes,
unsigned char *pabyDstData, int nDstBytes,
int nBlockXSize, int nBlockYSize);
/* ==================================================================== */
/* Public APIs */
/* ==================================================================== */
AIGInfo_t *AIGOpen(const char *, const char *);
CPLErr AIGReadTile(AIGInfo_t *, int, int, GInt32 *);
CPLErr AIGReadFloatTile(AIGInfo_t *, int, int, float *);
void AIGClose(AIGInfo_t *);
VSILFILE *AIGLLOpen(const char *, const char *);
CPL_C_END
#endif /* ndef AIGRID_H_INCLUDED */
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