1 : /******************************************************************************
2 : * $Id: hfa_overviews.cpp 18859 2010-02-19 19:41:06Z warmerdam $
3 : *
4 : * Project: Erdas Imagine Driver
5 : * Purpose: Entry point for building overviews, used by non-imagine formats.
6 : * Author: Frank Warmerdam, warmerdam@pobox.com
7 : *
8 : ******************************************************************************
9 : * Copyright (c) 2005, Frank Warmerdam
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 : #include "gdal_pam.h"
31 : #include "hfa_p.h"
32 : #include "cpl_string.h"
33 :
34 : CPL_CVSID("$Id: hfa_overviews.cpp 18859 2010-02-19 19:41:06Z warmerdam $");
35 :
36 2 : CPLErr HFAAuxBuildOverviews( const char *pszOvrFilename,
37 : GDALDataset *poParentDS,
38 : GDALDataset **ppoODS,
39 : int nBands, int *panBandList,
40 : int nNewOverviews, int *panNewOverviewList,
41 : const char *pszResampling,
42 : GDALProgressFunc pfnProgress,
43 : void *pProgressData )
44 :
45 : {
46 : /* ==================================================================== */
47 : /* If the .aux file doesn't exist yet then create it now. */
48 : /* ==================================================================== */
49 2 : if( *ppoODS == NULL )
50 : {
51 2 : GDALDataType eDT = GDT_Unknown;
52 : /* -------------------------------------------------------------------- */
53 : /* Determine the band datatype, and verify that all bands are */
54 : /* the same. */
55 : /* -------------------------------------------------------------------- */
56 : int iBand;
57 :
58 4 : for( iBand = 0; iBand < nBands; iBand++ )
59 : {
60 : GDALRasterBand *poBand =
61 2 : poParentDS->GetRasterBand( panBandList[iBand] );
62 :
63 2 : if( iBand == 0 )
64 2 : eDT = poBand->GetRasterDataType();
65 : else
66 : {
67 0 : if( eDT != poBand->GetRasterDataType() )
68 : {
69 : CPLError( CE_Failure, CPLE_NotSupported,
70 : "HFAAuxBuildOverviews() doesn't support a mixture of band"
71 0 : " data types." );
72 0 : return CE_Failure;
73 : }
74 : }
75 : }
76 :
77 : /* -------------------------------------------------------------------- */
78 : /* Create the HFA (.aux) file. We create it with */
79 : /* COMPRESSED=YES so that no space will be allocated for the */
80 : /* base band. */
81 : /* -------------------------------------------------------------------- */
82 2 : GDALDriver *poHFADriver = (GDALDriver *) GDALGetDriverByName("HFA");
83 2 : if (poHFADriver == NULL)
84 : {
85 : CPLError( CE_Failure, CPLE_AppDefined,
86 0 : "HFA driver is unavailable." );
87 0 : return CE_Failure;
88 : }
89 :
90 : const char *apszOptions[4] = { "COMPRESSED=YES", "AUX=YES",
91 2 : NULL, NULL };
92 :
93 2 : CPLString osDepFileOpt = "DEPENDENT_FILE=";
94 2 : osDepFileOpt += CPLGetFilename(poParentDS->GetDescription());
95 2 : apszOptions[2] = osDepFileOpt.c_str();
96 :
97 : *ppoODS =
98 : poHFADriver->Create( pszOvrFilename,
99 : poParentDS->GetRasterXSize(),
100 : poParentDS->GetRasterYSize(),
101 2 : nBands, eDT, (char **)apszOptions );
102 :
103 2 : if( *ppoODS == NULL )
104 0 : return CE_Failure;
105 : }
106 :
107 : /* ==================================================================== */
108 : /* Create the layers. We depend on the normal buildoverviews */
109 : /* support for HFA to do this. But we disable the internal */
110 : /* computation of the imagery for these layers. */
111 : /* */
112 : /* We avoid regenerating the new layers here, because if we did */
113 : /* it would use the base layer from the .aux file as the source */
114 : /* data, and that is fake (all invalid tiles). */
115 : /* ==================================================================== */
116 2 : CPLString oAdjustedResampling = "NO_REGEN:";
117 2 : oAdjustedResampling += pszResampling;
118 :
119 : CPLErr eErr =
120 : (*ppoODS)->BuildOverviews( oAdjustedResampling,
121 : nNewOverviews, panNewOverviewList,
122 : nBands, panBandList,
123 2 : pfnProgress, pProgressData );
124 :
125 2 : return eErr;
126 : }
127 :
|
