gdal_alg_priv.h

/******************************************************************************
 * $Id$
 *
 * Project:  GDAL Image Processing Algorithms
 * Purpose:  Prototypes and definitions for various GDAL based algorithms:
 *           private declarations.
 * Author:   Andrey Kiselev, dron@ak4719.spb.edu
 *
 ******************************************************************************
 * Copyright (c) 2008, Andrey Kiselev <dron@ak4719.spb.edu>
 * Copyright (c) 2010-2013, Even Rouault <even dot rouault at spatialys.com>
 *
 * 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 GDAL_ALG_PRIV_H_INCLUDED
#define GDAL_ALG_PRIV_H_INCLUDED

#ifndef DOXYGEN_SKIP

#include "gdal_alg.h"
#include "ogr_spatialref.h"

CPL_C_START

/** Source of the burn value */
typedef enum {
    /*! Use value from padfBurnValue */    GBV_UserBurnValue = 0,
    /*! Use value from the Z coordinate */ GBV_Z = 1,
    /*! Use value form the M value */    GBV_M = 2
} GDALBurnValueSrc;

typedef enum {
    GRMA_Replace = 0,
    GRMA_Add = 1,
} GDALRasterMergeAlg;

typedef struct {
    unsigned char * pabyChunkBuf;
    int nXSize;
    int nYSize;
    int nBands;
    GDALDataType eType;
    int nPixelSpace;
    GSpacing nLineSpace;
    GSpacing nBandSpace;
    const double *padfBurnValue;
    GDALBurnValueSrc eBurnValueSource;
    GDALRasterMergeAlg eMergeAlg;
} GDALRasterizeInfo;

typedef enum {
    GRO_Raster = 0,
    GRO_Vector = 1,
    GRO_Auto = 2,
} GDALRasterizeOptim;


/************************************************************************/
/*      Low level rasterizer API.                                       */
/************************************************************************/

typedef void (*llScanlineFunc)( void *, int, int, int, double );
typedef void (*llPointFunc)( void *, int, int, double );

void GDALdllImagePoint( int nRasterXSize, int nRasterYSize,
                        int nPartCount, const int *panPartSize,
                        const double *padfX, const double *padfY,
                        const double *padfVariant,
                        llPointFunc pfnPointFunc, void *pCBData );

void GDALdllImageLine( int nRasterXSize, int nRasterYSize,
                       int nPartCount, const int *panPartSize,
                       const double *padfX, const double *padfY,
                       const double *padfVariant,
                       llPointFunc pfnPointFunc, void *pCBData );

void GDALdllImageLineAllTouched( int nRasterXSize, int nRasterYSize,
                                 int nPartCount, const int *panPartSize,
                                 const double *padfX, const double *padfY,
                                 const double *padfVariant,
                                 llPointFunc pfnPointFunc, void *pCBData,
                                 int bAvoidBurningSamePoints );

void GDALdllImageFilledPolygon( int nRasterXSize, int nRasterYSize,
                                int nPartCount, const int *panPartSize,
                                const double *padfX, const double *padfY,
                                const double *padfVariant,
                                llScanlineFunc pfnScanlineFunc, void *pCBData );

CPL_C_END

/************************************************************************/
/*                          Polygon Enumerator                          */
/************************************************************************/

#define GP_NODATA_MARKER -51502112

template<class DataType, class EqualityTest> class GDALRasterPolygonEnumeratorT

{
private:
    void     MergePolygon( int nSrcId, int nDstId );
    int      NewPolygon( DataType nValue );

    CPL_DISALLOW_COPY_ASSIGN(GDALRasterPolygonEnumeratorT)

public:  // these are intended to be readonly.

    GInt32   *panPolyIdMap = nullptr;
    DataType   *panPolyValue = nullptr;

    int      nNextPolygonId = 0;
    int      nPolyAlloc = 0;

    int      nConnectedness = 0;

public:
    explicit GDALRasterPolygonEnumeratorT( int nConnectedness=4 );
            ~GDALRasterPolygonEnumeratorT();

    void     ProcessLine( DataType *panLastLineVal, DataType *panThisLineVal,
                          GInt32 *panLastLineId,  GInt32 *panThisLineId,
                          int nXSize );

    void     CompleteMerges();

    void     Clear();
};

struct IntEqualityTest
{
    bool operator()(GInt32 a, GInt32 b) const { return a == b; }
};

typedef GDALRasterPolygonEnumeratorT<GInt32, IntEqualityTest> GDALRasterPolygonEnumerator;

typedef void* (*GDALTransformDeserializeFunc)( CPLXMLNode *psTree );

void CPL_DLL *GDALRegisterTransformDeserializer(const char* pszTransformName,
                                       GDALTransformerFunc pfnTransformerFunc,
                                       GDALTransformDeserializeFunc pfnDeserializeFunc);
void CPL_DLL GDALUnregisterTransformDeserializer(void* pData);

void GDALCleanupTransformDeserializerMutex();

/* Transformer cloning */

void* GDALCreateTPSTransformerInt( int nGCPCount, const GDAL_GCP *pasGCPList,
                                   int bReversed, char** papszOptions );

void CPL_DLL * GDALCloneTransformer( void *pTransformerArg );

void GDALRefreshGenImgProjTransformer(void* hTransformArg);
void GDALRefreshApproxTransformer(void* hTransformArg);

int GDALTransformLonLatToDestGenImgProjTransformer(void* hTransformArg,
                                                    double* pdfX,
                                                    double* pdfY);
int GDALTransformLonLatToDestApproxTransformer(void* hTransformArg,
                                                    double* pdfX,
                                                    double* pdfY);

bool GDALTransformIsTranslationOnPixelBoundaries(GDALTransformerFunc pfnTransformer,
                                                 void                *pTransformerArg);

typedef struct {
    GDALTransformerInfo sTI;

    bool        bReversed;

    // Map from target georef coordinates back to geolocation array
    // pixel line coordinates.  Built only if needed.
    size_t      nBackMapWidth;
    size_t      nBackMapHeight;
    double      adfBackMapGeoTransform[6];  // Maps georef to pixel/line.
    float       *pafBackMapX;
    float       *pafBackMapY;

    // Geolocation bands.
    GDALDatasetH     hDS_X;
    GDALRasterBandH  hBand_X;
    GDALDatasetH     hDS_Y;
    GDALRasterBandH  hBand_Y;
    int              bSwapXY;

    // Located geolocation data.
    size_t           nGeoLocXSize;
    size_t           nGeoLocYSize;
    double           *padfGeoLocX;
    double           *padfGeoLocY;
    double           dfMinX;
    double           dfYAtMinX;
    double           dfMinY;
    double           dfXAtMinY;
    double           dfMaxX;
    double           dfYAtMaxX;
    double           dfMaxY;
    double           dfXAtMaxY;

    int              bHasNoData;
    double           dfNoDataX;

    // Geolocation <-> base image mapping.
    double           dfPIXEL_OFFSET;
    double           dfPIXEL_STEP;
    double           dfLINE_OFFSET;
    double           dfLINE_STEP;

    char **          papszGeolocationInfo;

} GDALGeoLocTransformInfo;


/************************************************************************/
/*      Color table related                                             */
/************************************************************************/

// Definitions exists for T = GUInt32 and T = GUIntBig.
template<class T> int
GDALComputeMedianCutPCTInternal( GDALRasterBandH hRed,
                                 GDALRasterBandH hGreen,
                                 GDALRasterBandH hBlue,
                                 GByte* pabyRedBand,
                                 GByte* pabyGreenBand,
                                 GByte* pabyBlueBand,
                                 int (*pfnIncludePixel)(int,int,void*),
                                 int nColors,
                                 int nBits,
                                 T* panHistogram,
                                 GDALColorTableH hColorTable,
                                 GDALProgressFunc pfnProgress,
                                 void * pProgressArg );

int GDALDitherRGB2PCTInternal( GDALRasterBandH hRed,
                               GDALRasterBandH hGreen,
                               GDALRasterBandH hBlue,
                               GDALRasterBandH hTarget,
                               GDALColorTableH hColorTable,
                               int nBits,
                               GInt16* pasDynamicColorMap,
                               int bDither,
                               GDALProgressFunc pfnProgress,
                               void * pProgressArg );

#define PRIME_FOR_65536 98317

// See HashHistogram structure in gdalmediancut.cpp and ColorIndex structure in
// gdaldither.cpp 6 * sizeof(int) should be the size of the largest of both
// structures.
#define MEDIAN_CUT_AND_DITHER_BUFFER_SIZE_65536 (6 * sizeof(int) * PRIME_FOR_65536)

/************************************************************************/
/*      Float comparison function.                                      */
/************************************************************************/

/**
 * Units in the Last Place. This specifies how big an error we are willing to
 * accept in terms of the value of the least significant digit of the floating
 * point number’s representation. MAX_ULPS can also be interpreted in terms of
 * how many representable floats we are willing to accept between A and B.
 */
#define MAX_ULPS 10

GBool GDALFloatEquals(float A, float B);

struct FloatEqualityTest
{
    bool operator()(float a, float b) { return GDALFloatEquals(a,b) == TRUE; }
};

bool GDALComputeAreaOfInterest(OGRSpatialReference* poSRS,
                               double adfGT[6],
                               int nXSize,
                               int nYSize,
                               double& dfWestLongitudeDeg,
                               double& dfSouthLatitudeDeg,
                               double& dfEastLongitudeDeg,
                               double& dfNorthLatitudeDeg );

bool GDALComputeAreaOfInterest(OGRSpatialReference* poSRS,
                               double dfX1,
                               double dfY1,
                               double dfX2,
                               double dfY2,
                               double& dfWestLongitudeDeg,
                               double& dfSouthLatitudeDeg,
                               double& dfEastLongitudeDeg,
                               double& dfNorthLatitudeDeg );


#endif /* #ifndef DOXYGEN_SKIP */

#endif /* ndef GDAL_ALG_PRIV_H_INCLUDED */