1 /****************************************************************************** 2 * $Id: gifabstractdataset.h b55a33407a80673ec314b165c82f47dd02e9dc9c 2020-04-27 20:37:55 +0200 Even Rouault $ 3 * 4 * Project: GIF Driver 5 * Purpose: GIF Abstract Dataset 6 * Author: Even Rouault <even dot rouault at spatialys.com> 7 * 8 **************************************************************************** 9 * Copyright (c) 2011-2013, Even Rouault <even dot rouault at spatialys.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 #ifndef GIFABSTRACTDATASET_H_INCLUDED 31 #define GIFABSTRACTDATASET_H_INCLUDED 32 33 #include "gdal_pam.h" 34 35 CPL_C_START 36 #include "gif_lib.h" 37 CPL_C_END 38 39 /************************************************************************/ 40 /* ==================================================================== */ 41 /* GIFAbstractDataset */ 42 /* ==================================================================== */ 43 /************************************************************************/ 44 45 class GIFAbstractDataset CPL_NON_FINAL: public GDALPamDataset 46 { 47 protected: 48 friend class GIFAbstractRasterBand; 49 50 VSILFILE *fp; 51 52 GifFileType *hGifFile; 53 54 char *pszProjection; 55 int bGeoTransformValid; 56 double adfGeoTransform[6]; 57 58 int nGCPCount; 59 GDAL_GCP *pasGCPList; 60 61 int bHasReadXMPMetadata; 62 void CollectXMPMetadata(); 63 64 CPLString osWldFilename; 65 66 void DetectGeoreferencing( GDALOpenInfo * poOpenInfo ); 67 68 public: 69 GIFAbstractDataset(); 70 ~GIFAbstractDataset() override; 71 72 const char *_GetProjectionRef() override; GetSpatialRef()73 const OGRSpatialReference* GetSpatialRef() const override { 74 return GetSpatialRefFromOldGetProjectionRef(); 75 } 76 CPLErr GetGeoTransform( double * ) override; 77 int GetGCPCount() override; 78 const char *_GetGCPProjection() override; GetGCPSpatialRef()79 const OGRSpatialReference* GetGCPSpatialRef() const override { 80 return GetGCPSpatialRefFromOldGetGCPProjection(); 81 } 82 const GDAL_GCP *GetGCPs() override; 83 84 char **GetMetadataDomainList() override; 85 char **GetMetadata( const char * pszDomain = "" ) override; 86 87 char **GetFileList() override; 88 89 static int Identify( GDALOpenInfo * ); 90 91 static GifFileType* myDGifOpen( void *userPtr, InputFunc readFunc ); 92 static int myDGifCloseFile( GifFileType *hGifFile ); 93 static int myEGifCloseFile( GifFileType *hGifFile ); 94 static int ReadFunc( GifFileType *psGFile, GifByteType *pabyBuffer, 95 int nBytesToRead ); 96 static GifRecordType FindFirstImage( GifFileType* hGifFile ); 97 }; 98 99 /************************************************************************/ 100 /* ==================================================================== */ 101 /* GIFAbstractRasterBand */ 102 /* ==================================================================== */ 103 /************************************************************************/ 104 105 class GIFAbstractRasterBand CPL_NON_FINAL: public GDALPamRasterBand 106 { 107 protected: 108 SavedImage *psImage; 109 110 int *panInterlaceMap; 111 112 GDALColorTable *poColorTable; 113 114 int nTransparentColor; 115 116 public: 117 GIFAbstractRasterBand(GIFAbstractDataset *poDS, int nBand, 118 SavedImage *psSavedImage, int nBackground, 119 int bAdvertiseInterlacedMDI ); 120 ~GIFAbstractRasterBand() override; 121 122 double GetNoDataValue( int *pbSuccess = nullptr ) override; 123 GDALColorInterp GetColorInterpretation() override; 124 GDALColorTable *GetColorTable() override; 125 }; 126 127 #endif 128