utilities/CxImage/ximajas.h

   1 /*\r
   2  * File:        ximajas.h\r
   3  * Purpose:     Jasper Image Class Loader and Writer\r
   4  */\r
   5 /* ==========================================================\r
   6  * CxImageJAS (c) 12/Apr/2003 Davide Pizzolato - www.xdp.it\r
   7  * For conditions of distribution and use, see copyright notice in ximage.h\r
   8  *\r
   9  * based on JasPer Copyright (c) 2001-2003 Michael David Adams - All rights reserved.\r
  10  * ==========================================================\r
  11  */\r
  12 #if !defined(__ximaJAS_h)\r
  13 #define __ximaJAS_h\r
  14 \r
  15 #include "ximage.h"\r
  16 \r
  17 #if CXIMAGE_SUPPORT_JASPER\r
  18 \r
  19 #include "../jasper/include/jasper/jasper.h"\r
  20 \r
  21 class CxImageJAS: public CxImage\r
  22 {\r
  23 public:\r
  24         CxImageJAS(): CxImage((DWORD)0) {}      // <vho> cast to DWORD\r
  25 \r
  26 //      bool Load(const TCHAR * imageFileName){ return CxImage::Load(imageFileName,0);}\r
  27 //      bool Save(const TCHAR * imageFileName){ return CxImage::Save(imageFileName,0);}\r
  28         bool Decode(CxFile * hFile, DWORD imagetype = 0);\r
  29         bool Decode(FILE *hFile, DWORD imagetype = 0) { CxIOFile file(hFile); return Decode(&file,imagetype); }\r
  30 \r
  31 #if CXIMAGE_SUPPORT_ENCODE\r
  32         bool Encode(CxFile * hFile, DWORD imagetype = 0);\r
  33         bool Encode(FILE *hFile, DWORD imagetype = 0) { CxIOFile file(hFile); return Encode(&file,imagetype); }\r
  34 #endif // CXIMAGE_SUPPORT_ENCODE\r
  35 protected:\r
  36 \r
  37         class CxFileJas\r
  38         {\r
  39         public:\r
  40                 CxFileJas(CxFile* pFile,jas_stream_t *stream)\r
  41                 {\r
  42                         if (stream->obj_) jas_free(stream->obj_);\r
  43                         stream->obj_ = pFile;\r
  44 \r
  45                         // <vho> - cannot set the stream->ops_->functions here,\r
  46                         // because this overwrites a static structure in the Jasper library.\r
  47                         // This structure is used by Jasper for internal operations too, e.g. tempfile.\r
  48                         // However the ops_ pointer in the stream can be overwritten.\r
  49 \r
  50                         //stream->ops_->close_ = JasClose;\r
  51                         //stream->ops_->read_  = JasRead;\r
  52                         //stream->ops_->seek_  = JasSeek;\r
  53                         //stream->ops_->write_ = JasWrite;\r
  54 \r
  55                         jas_stream_CxFile.close_ = JasClose;\r
  56                         jas_stream_CxFile.read_  = JasRead;\r
  57                         jas_stream_CxFile.seek_  = JasSeek;\r
  58                         jas_stream_CxFile.write_ = JasWrite;\r
  59 \r
  60                         stream->ops_ = &jas_stream_CxFile;\r
  61 \r
  62                         // <vho> - end\r
  63                 }\r
  64                 static int JasRead(jas_stream_obj_t *obj, char *buf, int cnt)\r
  65                 {               return ((CxFile*)obj)->Read(buf,1,cnt); }\r
  66                 static int JasWrite(jas_stream_obj_t *obj, char *buf, int cnt)\r
  67                 {               return ((CxFile*)obj)->Write(buf,1,cnt); }\r
  68                 static long JasSeek(jas_stream_obj_t *obj, long offset, int origin)\r
  69                 {               return ((CxFile*)obj)->Seek(offset,origin); }\r
  70                 static int JasClose(jas_stream_obj_t * /*obj*/)\r
  71                 {               return 1; }\r
  72 \r
  73         // <vho>\r
  74 private:\r
  75                 jas_stream_ops_t jas_stream_CxFile;\r
  76         // <vho> - end\r
  77 \r
  78         };\r
  79 \r
  80 };\r
  81 \r
  82 #endif\r
  83 \r
  84 #endif\r