00001 /** \file
00002  * \brief C++ Wrapper for File Access
00003  *
00004  * See Copyright Notice in im_lib.h
00005  */
00006 
00007 #ifndef __IM_PLUS_H
00008 #define __IM_PLUS_H
00009 
00010  
00011 /** \brief C++ Wrapper for the Image File Structure
00012  *
00013  * \par
00014  * Usage is just like the C API. Open and New are replaced by equivalent constructors. \n
00015  * Close is replaced by the destructor. Error checking is done by the Error() member. \n
00016  * Open and New errors are cheked using the Failed() member.
00017  *  \ingroup file */
00018 class imImageFile
00019 {
00020   imFile* ifile;
00021   int error;
00022 
00023   imImageFile() {};
00024 
00025 public:
00026 
00027   imImageFile(const char* file_name)
00028     { this->ifile = imFileOpen(file_name, &this->error); }
00029 
00030   imImageFile(const char* file_name, const char* format)
00031     { this->ifile = imFileNew(file_name, format, &this->error); }
00032 
00033   ~imImageFile()
00034     { if (this->ifile) imFileClose(this->ifile); }
00035 
00036   int Failed() 
00037     { return this->ifile == 0; }
00038 
00039   int Error()
00040     { return this->error; }
00041 
00042   void SetAttribute(const char* attrib, int data_type, int count, const void* data)
00043     { imFileSetAttribute(this->ifile, attrib, data_type, count, data); }
00044 
00045   const void* GetAttribute(const char* attrib, int *data_type, int *count)
00046     { return imFileGetAttribute(this->ifile, attrib, data_type, count); }
00047 
00048   void GetInfo(char* format, char* compression, int *image_count)
00049     { imFileGetInfo(this->ifile, format, compression, image_count); }
00050 
00051   void ReadImageInfo(int index, int *width, int *height, int *color_mode, int *data_type)
00052     { this->error = imFileReadImageInfo(this->ifile, index, width, height, color_mode, data_type); }
00053 
00054   void GetPalette(long* palette, int *palette_count)
00055     { imFileGetPalette(this->ifile, palette, palette_count); }
00056 
00057   void ReadImageData(void* data, int convert2bitmap, int color_mode_flags)
00058     { this->error = imFileReadImageData(this->ifile, data, convert2bitmap, color_mode_flags); }
00059 
00060   void SetInfo(const char* compression)
00061     { imFileSetInfo(this->ifile, compression); }
00062 
00063   void SetPalette(long* palette, int palette_count)
00064     { imFileSetPalette(this->ifile, palette, palette_count); }
00065 
00066   void WriteImageInfo(int width, int height, int color_mode, int data_type)
00067     { this->error = imFileWriteImageInfo(this->ifile, width, height, color_mode, data_type); }
00068 
00069   void WriteImageData(void* data)
00070     { this->error = imFileWriteImageData(this->ifile, data); }
00071 };
00072 
00073 #endif