Panda3D
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00001 // Filename: pnmFileType.h 00002 // Created by: drose (15Jun00) 00003 // 00004 //////////////////////////////////////////////////////////////////// 00005 // 00006 // PANDA 3D SOFTWARE 00007 // Copyright (c) Carnegie Mellon University. All rights reserved. 00008 // 00009 // All use of this software is subject to the terms of the revised BSD 00010 // license. You should have received a copy of this license along 00011 // with this source code in a file named "LICENSE." 00012 // 00013 //////////////////////////////////////////////////////////////////// 00014 00015 #ifndef PNMFILETYPE_H 00016 #define PNMFILETYPE_H 00017 00018 #include "pandabase.h" 00019 00020 #include "pnmimage_base.h" 00021 00022 #include "typedObject.h" 00023 #include "typedWritable.h" 00024 00025 class PNMReader; 00026 class PNMWriter; 00027 class FactoryParams; 00028 00029 //////////////////////////////////////////////////////////////////// 00030 // Class : PNMFileType 00031 // Description : This is the base class of a family of classes that 00032 // represent particular image file types that PNMImage 00033 // supports. 00034 //////////////////////////////////////////////////////////////////// 00035 class EXPCL_PANDA_PNMIMAGE PNMFileType : public TypedWritable { 00036 protected: 00037 PNMFileType(); 00038 00039 public: 00040 virtual ~PNMFileType(); 00041 00042 PUBLISHED: 00043 virtual string get_name() const=0; 00044 00045 virtual int get_num_extensions() const; 00046 virtual string get_extension(int n) const; 00047 MAKE_SEQ(get_extensions, get_num_extensions, get_extension); 00048 virtual string get_suggested_extension() const; 00049 00050 public: 00051 virtual bool has_magic_number() const; 00052 virtual bool matches_magic_number(const string &magic_number) const; 00053 00054 virtual PNMReader *make_reader(istream *file, bool owns_file = true, 00055 const string &magic_number = string()); 00056 virtual PNMWriter *make_writer(ostream *file, bool owns_file = true); 00057 00058 protected: 00059 static void init_pnm(); 00060 00061 private: 00062 static bool _did_init_pnm; 00063 00064 00065 // The TypedWritable interface follows. 00066 public: 00067 static void register_with_read_factory(); 00068 virtual void write_datagram(BamWriter *writer, Datagram &datagram); 00069 00070 protected: 00071 static TypedWritable *make_PNMFileType(const FactoryParams ¶ms); 00072 00073 public: 00074 static TypeHandle get_class_type() { 00075 return _type_handle; 00076 } 00077 static void init_type() { 00078 TypedWritable::init_type(); 00079 register_type(_type_handle, "PNMFileType", 00080 TypedWritable::get_class_type()); 00081 } 00082 virtual TypeHandle get_type() const { 00083 return get_class_type(); 00084 } 00085 virtual TypeHandle force_init_type() {init_type(); return get_class_type();} 00086 00087 private: 00088 static TypeHandle _type_handle; 00089 }; 00090 00091 #endif 00092