psychlops/extension/FileFormat/JPEG/psychlops_g_JPEG_bridge.h

   1 /*
   2  *  psychlops_g_JPEG_bridge.h
   3  *  Psychlops Standard Library (Universal)
   4  *
   5  *  Last Modified 2009/04/22 by Kenchi HOSOKAWA
   6  *  (C) 2006- Kenchi HOSOKAWA, Kazushi MARUYA and Takao SATO
   7  */
   8
   9 #ifndef HEADER_PSYCHLOPS_IMAGE_FORMATS_JPEG
  10 #define HEADER_PSYCHLOPS_IMAGE_FORMATS_JPEG
  11
  12
  13 #include <stdio.h>
  14 #include <stdlib.h>
  15 extern "C" {
  16 #include "jpeglib.h"
  17 }
  18
  19 #include "../../../core/graphic/psychlops_g_image.h"
  20
  21
  22 namespace Psychlops {
  23 namespace IMAGE_FORMATS {
  24
  25
  26         const unsigned int JPEG_BYTES_TO_CHECK = 4;
  27         class JPEG_BRIDGE : public IMAGE_FORMAT {
  28                 private:
  29                 FILE *fp;
  30                 bool is_opened_;
  31
  32                 // JPEG specific
  33                 struct jpeg_decompress_struct cinfo;
  34                 struct jpeg_error_mgr jerr;
  35
  36                 public:
  37                 JPEG_BRIDGE();
  38                 virtual ~JPEG_BRIDGE();
  39                 virtual void load(const char *file_name, Image * target);
  40                 virtual void save(const char *file_name, Image * target);
  41
  42                 private:
  43                 void open(const char *file_name, const char *mode);
  44                 void close();
  45                 void check_before_read();
  46                 void read(Image * target);
  47                 void prepare_before_write();
  48                 void write(Image * target);
  49
  50         };
  51
  52
  53 }
  54 }
  55
  56 #endif