15 #ifndef PNMFILETYPESGI_H
16 #define PNMFILETYPESGI_H
18 #include "pandabase.h"
22 #include "pnmFileType.h"
23 #include "pnmReader.h"
24 #include "pnmWriter.h"
30 class EXPCL_PANDA_PNMIMAGETYPES PNMFileTypeSGI :
public PNMFileType {
34 virtual string get_name()
const;
44 const string &magic_number =
string());
50 Reader(
PNMFileType *type, istream *file,
bool owns_file,
string magic_number);
53 virtual bool supports_read_row()
const;
54 virtual bool read_row(
xel *array, xelval *alpha,
int x_size,
int y_size);
70 Writer(
PNMFileType *type, ostream *file,
bool owns_file);
73 virtual bool supports_write_row()
const;
74 virtual bool write_header();
75 virtual bool write_row(
xel *array, xelval *alpha);
82 typedef short ScanElem;
89 TabEntry &Table(
int chan) {
90 return table[chan * _y_size + current_row];
93 void write_rgb_header(
const char *imagename);
95 void write_channels(ScanLine channel[],
void (*put)(ostream *,
short));
96 void build_scanline(ScanLine output[],
xel *row_data, xelval *alpha_data);
97 ScanElem *compress(ScanElem *temp, ScanLine &output);
98 int rle_compress(ScanElem *inbuf,
int size);
113 static void register_with_read_factory();
122 static void init_type() {
123 PNMFileType::init_type();
124 register_type(_type_handle,
"PNMFileTypeSGI",
125 PNMFileType::get_class_type());
128 return get_class_type();
130 virtual TypeHandle force_init_type() {init_type();
return get_class_type();}
136 #endif // HAVE_SGI_RGB
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 int get_num_extensions() const
Returns the number of different possible filename extensions associated with this particular file typ...
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 string get_suggested_extension() const
Returns a suitable filename extension (without a leading dot) to suggest for files of this type...
virtual bool has_magic_number() const
Returns true if this particular file type uses a magic number to identify it, false otherwise...
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...
TypeHandle is the identifier used to differentiate C++ class types.
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...