psychlops/extension/FileFormat/PNG/psychlops_g_PNG_bridge.h

   1 /*
   2  *  psychlops_g_PNG_bridge.h
   3  *  Psychlops Standard Library (Universal)
   4  *
   5  *  Last Modified 2006/08/22 by Kenchi HOSOKAWA
   6  *  (C) 2006- Kenchi HOSOKAWA, Kazushi MARUYA and Takao SATO
   7  */
   8
   9 #ifndef HEADER_PSYCHLOPS_IMAGE_FORMATS_PNG
  10 #define HEADER_PSYCHLOPS_IMAGE_FORMATS_PNG
  11
  12 #ifndef __cplusplus
  13 #define __cplusplus
  14 #endif
  15
  16 #include <stdio.h>
  17 #include <stdlib.h>
  18 #include "png.h"
  19
  20 #include "../../../core/graphic/psychlops_g_image.h"
  21
  22
  23 namespace Psychlops {
  24 namespace IMAGE_FORMATS {
  25
  26
  27         const unsigned int PNG_BYTES_TO_CHECK = 4;
  28         class PNG_BRIDGE : public IMAGE_FORMAT {
  29                 private:
  30                 FILE *fp;
  31                 bool is_opened_;
  32
  33                 // PNG specific
  34                 png_structp png_ptr;
  35                 png_infop   info_ptr, end_info_ptr;
  36                 png_uint_32 i;
  37                 double      file_gamma;
  38
  39
  40                 public:
  41                 PNG_BRIDGE();
  42                 virtual ~PNG_BRIDGE();
  43                 virtual void load(const char *file_name, Image * target);
  44                 virtual void save(const char *file_name, Image * target);
  45
  46                 private:
  47                 void open(const char *file_name, const char *mode);
  48                 void close();
  49                 void check_before_read();
  50                 void read(Image * target);
  51                 void prepare_before_write();
  52                 void write(Image * target);
  53
  54         };
  55
  56
  57 }
  58 }
  59
  60 #endif