15 #ifndef PNMFILETYPEJPG_H 16 #define PNMFILETYPEJPG_H 18 #include "pandabase.h" 22 #include "pnmFileType.h" 23 #include "pnmReader.h" 24 #include "pnmWriter.h" 27 #ifndef WIN32_LEAN_AND_MEAN 28 #define WIN32_LEAN_AND_MEAN 1 51 class EXPCL_PANDA_PNMIMAGETYPES PNMFileTypeJPG :
public PNMFileType {
55 virtual string get_name()
const;
65 const string &magic_number =
string());
71 Reader(
PNMFileType *type, istream *file,
bool owns_file,
string magic_number);
74 virtual void prepare_read();
75 virtual int read_data(
xel *array, xelval *alpha);
78 struct jpeg_decompress_struct _cinfo;
80 struct jpeg_error_mgr pub;
81 jmp_buf setjmp_buffer;
83 typedef struct my_error_mgr *_my_error_ptr;
84 struct my_error_mgr _jerr;
87 unsigned long offBits;
89 unsigned short cBitCount;
102 Writer(
PNMFileType *type, ostream *file,
bool owns_file);
104 virtual int write_data(
xel *array, xelval *alpha);
110 static void register_with_read_factory();
119 static void init_type() {
120 PNMFileType::init_type();
121 register_type(_type_handle,
"PNMFileTypeJPG",
122 PNMFileType::get_class_type());
125 return get_class_type();
127 virtual TypeHandle force_init_type() {init_type();
return get_class_type();}
virtual string get_extension(int n) const
Returns the nth possible filename extension associated with this particular file type, without a leading dot.
virtual PNMWriter * make_writer(ostream *file, bool owns_file=true)
Allocates and returns a new PNMWriter suitable for reading from this file type, if possible...
Base class for objects that can be written to and read from Bam files.
This is the base class of a family of classes that represent particular image file types that PNMImag...
virtual PNMReader * make_reader(istream *file, bool owns_file=true, const string &magic_number=string())
Allocates and returns a new PNMReader suitable for reading from this file type, if possible...
virtual bool matches_magic_number(const string &magic_number) const
Returns true if the indicated "magic number" byte stream (the initial few bytes read from the file) m...
An instance of this class is passed to the Factory when requesting it to do its business and construc...
This is an abstract base class that defines the interface for reading image files of various types...
This is an abstract base class that defines the interface for writing image files of various types...
virtual bool has_magic_number() const
Returns true if this particular file type uses a magic number to identify it, false otherwise...
TypeHandle is the identifier used to differentiate C++ class types.
virtual int get_num_extensions() const
Returns the number of different possible filename extensions associated with this particular file typ...
virtual string get_suggested_extension() const
Returns a suitable filename extension (without a leading dot) to suggest for files of this type...