1 /******************************************************************************
2  *
3  * File :    pgchip.h
4  * Project:  PGCHIP Driver
5  * Purpose:  Main header file for POSTGIS CHIP/GDAL Driver
6  * Author:   Benjamin Simon, noumayoss@gmail.com
7  *
8  ******************************************************************************
9  * Copyright (c) 2005, Benjamin Simon, noumayoss@gmail.com
10  *
11  * Permission is hereby granted, free of charge, to any person obtaining a
12  * copy of this software and associated documentation files (the "Software"),
13  * to deal in the Software without restriction, including without limitation
14  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
15  * and/or sell copies of the Software, and to permit persons to whom the
16  * Software is furnished to do so, subject to the following conditions:
17  *
18  * The above copyright notice and this permission notice shall be included
19  * in all copies or substantial portions of the Software.
20  *
21  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
22  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
23  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
24  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
25  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
26  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
27  * DEALINGS IN THE SOFTWARE.
28  ******************************************************************************
29  *
30  * Revision 1.1  2005/08/29  bsimon
31  * New
32  *
33  */
34 
35 #include "gdal_priv.h"
36 #include "libpq-fe.h"
37 #include "liblwgeom.h"
38 
39 // External functions (what's again the reason for using explicit hex form ?)
40 extern void pgch_deparse_hex(unsigned char in, unsigned char *out);
41 extern void deparse_hex_string(unsigned char *strOut,char *strIn,int length);
42 extern void parse_hex_string(unsigned char *strOut,char *strIn,int length);
43 
44 /* color types */
45 #define PGCHIP_COLOR_TYPE_GRAY 0
46 #define PGCHIP_COLOR_TYPE_PALETTE 1
47 #define PGCHIP_COLOR_TYPE_RGB_ALPHA 4
48 
49 //pg_chip color struct
50 typedef struct pgchip_color_nohex_struct
51 {
52    unsigned char red;
53    unsigned char green;
54    unsigned char blue;
55    unsigned char alpha;
56 } pgchip_color;
57 
58 
59 /************************************************************************/
60 /* ==================================================================== */
61 /*				PGCHIPDataset				*/
62 /* ==================================================================== */
63 /************************************************************************/
64 
65 class PGCHIPRasterBand;
66 
67 class PGCHIPDataset : public GDALDataset{
68 
69     friend class PGCHIPRasterBand;
70 
71     PGconn      *hPGConn;
72     char        *pszTableName;
73     char	*pszDSName;
74     char	*pszProjection;
75 
76     CHIP        *PGCHIP;
77     int         SRID;
78     int         nBitDepth;
79 
80     int                 nColorType; /* PGHIP_COLOR_TYPE_* */
81     GDALColorTable      *poColorTable;
82     int		bHaveNoData;
83     double 	dfNoDataValue;
84 
85     double              adfGeoTransform[6];
86     int                 bGeoTransformValid;
87 
88   public:
89 
90 	PGCHIPDataset();
91         ~PGCHIPDataset();
92 
93     static GDALDataset *Open( GDALOpenInfo * );
94 
95     static void        printChipInfo(const CHIP& chip);
96 
97     CPLErr 	GetGeoTransform( double * padfTransform );
98     const char *GetProjectionRef();
99 };
100 
101 /************************************************************************/
102 /* ==================================================================== */
103 /*                            PGCHIPRasterBand                          */
104 /* ==================================================================== */
105 /************************************************************************/
106 
107 class PGCHIPRasterBand : public GDALRasterBand{
108 
109     friend class PGCHIPDataset;
110 
111   public:
112 
113     PGCHIPRasterBand( PGCHIPDataset *, int );
114 
115     virtual CPLErr IReadBlock( int, int, void * );
116     virtual GDALColorInterp GetColorInterpretation();
117     virtual GDALColorTable *GetColorTable();
118 
119 };
120