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# gdal_alg_priv.h

    00001 /******************************************************************************
    00002  * $Id: gdal_alg_priv.h 18340 2009-12-19 04:41:45Z chaitanya $
    00003  *
    00004  * Project:  GDAL Image Processing Algorithms
    00005  * Purpose:  Prototypes and definitions for various GDAL based algorithms:
    00006  *           private declarations.
    00007  * Author:   Andrey Kiselev, dron@ak4719.spb.edu
    00008  *
    00009  ******************************************************************************
    00010  * Copyright (c) 2008, Andrey Kiselev <dron@ak4719.spb.edu>
    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 #ifndef GDAL_ALG_PRIV_H_INCLUDED
    00032 #define GDAL_ALG_PRIV_H_INCLUDED
    00033
    00034 #include "gdal_alg.h"
    00035
    00036 CPL_C_START
    00037
    00039 typedef enum {    GBV_UserBurnValue = 0,    GBV_Z = 1,    GBV_M = 2
    00043 } GDALBurnValueSrc;
    00044
    00045 typedef struct {
    00046     unsigned char * pabyChunkBuf;
    00047     int nXSize;
    00048     int nYSize;
    00049     int nBands;
    00050     GDALDataType eType;
    00051     double *padfBurnValue;
    00052     GDALBurnValueSrc eBurnValueSource;
    00053 } GDALRasterizeInfo;
    00054
    00055 /************************************************************************/
    00056 /*      Low level rasterizer API.                                       */
    00057 /************************************************************************/
    00058
    00059 typedef void (*llScanlineFunc)( void *, int, int, int, double );
    00060 typedef void (*llPointFunc)( void *, int, int, double );
    00061
    00062 void GDALdllImagePoint( int nRasterXSize, int nRasterYSize,
    00063                         int nPartCount, int *panPartSize,
    00064                         double *padfX, double *padfY, double *padfVariant,
    00065                         llPointFunc pfnPointFunc, void *pCBData );
    00066
    00067 void GDALdllImageLine( int nRasterXSize, int nRasterYSize,
    00068                        int nPartCount, int *panPartSize,
    00069                        double *padfX, double *padfY, double *padfVariant,
    00070                        llPointFunc pfnPointFunc, void *pCBData );
    00071
    00072 void GDALdllImageLineAllTouched(int nRasterXSize, int nRasterYSize,
    00073                                 int nPartCount, int *panPartSize,
    00074                                 double *padfX, double *padfY,
    00075                                 double *padfVariant,
    00076                                 llPointFunc pfnPointFunc, void *pCBData );
    00077
    00078 void GDALdllImageFilledPolygon(int nRasterXSize, int nRasterYSize,
    00079                                int nPartCount, int *panPartSize,
    00080                                double *padfX, double *padfY,
    00081                                double *padfVariant,
    00082                                llScanlineFunc pfnScanlineFunc, void *pCBData );
    00083
    00084 CPL_C_END
    00085
    00086 /************************************************************************/
    00087 /*                          Polygon Enumerator                          */
    00088 /************************************************************************/
    00089
    00090 class GDALRasterPolygonEnumerator
    00091
    00092 {
    00093 private:
    00094     void     MergePolygon( int nSrcId, int nDstId );
    00095     int      NewPolygon( GInt32 nValue );
    00096
    00097 public:  // these are intended to be readonly.
    00098
    00099     GInt32   *panPolyIdMap;
    00100     GInt32   *panPolyValue;
    00101
    00102     int      nNextPolygonId;
    00103     int      nPolyAlloc;
    00104
    00105     int      nConnectedness;
    00106
    00107 public:
    00108              GDALRasterPolygonEnumerator( int nConnectedness=4 );
    00109             ~GDALRasterPolygonEnumerator();
    00110
    00111     void     ProcessLine( GInt32 *panLastLineVal, GInt32 *panThisLineVal,
    00112                           GInt32 *panLastLineId,  GInt32 *panThisLineId,
    00113                           int nXSize );
    00114
    00115     void     CompleteMerges();
    00116
    00117     void     Clear();
    00118 };
    00119
    00120 #endif /* ndef GDAL_ALG_PRIV_H_INCLUDED */

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