66 lines
1.6 KiB
C++
66 lines
1.6 KiB
C++
/**
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* PANDA 3D SOFTWARE
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* Copyright (c) Carnegie Mellon University. All rights reserved.
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*
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* All use of this software is subject to the terms of the revised BSD
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* license. You should have received a copy of this license along
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* with this source code in a file named "LICENSE."
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*
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* @file pnmReader.h
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* @author drose
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* @date 2000-06-14
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*/
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#ifndef PNMREADER_H
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#define PNMREADER_H
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#include "pandabase.h"
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#include "pnmImageHeader.h"
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class PfmFile;
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/**
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* This is an abstract base class that defines the interface for reading image
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* files of various types. Any particular image file type that can be read
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* must define a class that inherits from PNMReader to read it.
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*/
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class EXPCL_PANDA_PNMIMAGE PNMReader : public PNMImageHeader {
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protected:
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INLINE PNMReader(PNMFileType *type, std::istream *file, bool owns_file);
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public:
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virtual ~PNMReader();
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INLINE void set_read_size(int x_size, int y_size);
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INLINE PNMFileType *get_type() const;
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virtual void prepare_read();
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virtual bool is_floating_point();
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virtual bool read_pfm(PfmFile &pfm);
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virtual int read_data(xel *array, xelval *alpha);
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virtual bool supports_read_row() const;
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virtual bool read_row(xel *array, xelval *alpha, int x_size, int y_size);
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virtual bool supports_stream_read() const;
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INLINE bool is_valid() const;
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private:
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int get_reduction_shift(int orig_size, int new_size);
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protected:
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PNMFileType *_type;
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bool _owns_file;
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std::istream *_file;
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bool _is_valid;
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int _read_x_size, _read_y_size;
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bool _has_read_size;
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int _x_shift, _y_shift;
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int _orig_x_size, _orig_y_size;
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};
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#include "pnmReader.I"
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#endif
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