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78 lines
2.2 KiB
C
78 lines
2.2 KiB
C
/**********************************************************************
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* $Id:$
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*
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* PostGIS - Spatial Types for PostgreSQL
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* http://postgis.refractions.net
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* Copyright 2010 Olivier Courtin <olivier.courtin@oslandia.com>
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*
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* This is free software; you can redistribute and/or modify it under
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* the terms of the GNU General Public Licence. See the COPYING file.
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*
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**********************************************************************/
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#include "liblwgeom.h"
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#include "libgeom.h"
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/* We use same value and macro to flags than in libgeom.h
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and we add a solid flag for surface enclosing a solid
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(so still 2 unused bits) */
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#define FLAGS_GET_SOLID(flags) (((flags) & 0x20)>>5)
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#define FLAGS_SET_SOLID(flags, value) ((flags) = (value) ? ((flags) | 0x20) : ((flags) & 0xDF))
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/**
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* TSERIALIZED (mostly inspired by GSERIALIZED struct)
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*/
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typedef struct
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{
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uint32 size; /* For PgSQL use only, use VAR* macros to manipulate. */
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uint32 srid; /* SRID */
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uchar flags; /* HasZ, HasM, HasBBox, IsGeodetic, IsReadOnly, IsSolid */
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uchar *data; /* See tserialized.txt */
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} TSERIALIZED;
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typedef struct
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{
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POINT4D *s; /* Edge starting point */
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POINT4D *e; /* Edge ending point */
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int count; /* Count how many time this edge is used in the TGEOM.
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Caution: We don't care about edge orientation ! */
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} TEDGE;
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typedef struct
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{
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int nedges;
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int maxedges;
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int *edges; /* Array of edge index, if value is negative,
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mean that the edge is reversed */
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int nrings;
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POINTARRAY **rings; /* Internal rings array */
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} TFACE;
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typedef struct
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{
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uchar type;
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uchar flags;
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uint32 srid; /* 0 == unknown */
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BOX3D *bbox; /* NULL == unneeded */
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int nedges;
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int maxedges;
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TEDGE **edges;
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int nfaces;
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int maxfaces;
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TFACE **faces;
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} TGEOM;
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extern TGEOM* tgeom_new(uint32 type, int hasz, int hasm);
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extern void tgeom_free(TGEOM *tgeom);
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extern TSERIALIZED* tserialized_from_lwgeom(LWGEOM *lwgeom);
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extern TGEOM* tgeom_from_lwgeom(LWGEOM *lwgeom);
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extern LWGEOM* lwgeom_from_tserialized(TSERIALIZED *t);
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extern LWGEOM* lwgeom_from_tgeom(TGEOM *tgeom);
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TSERIALIZED * tgeom_serialize(const TGEOM *tgeom);
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TGEOM * tgeom_deserialize(TSERIALIZED *serialized_form);
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extern void printTGEOM(TGEOM *tgeom);
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