163 lines
5.7 KiB
C++
163 lines
5.7 KiB
C++
/*M///////////////////////////////////////////////////////////////////////////////////////
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//
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// IMPORTANT: READ BEFORE DOWNLOADING, COPYING, INSTALLING OR USING.
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//
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// By downloading, copying, installing or using the software you agree to this license.
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// If you do not agree to this license, do not download, install,
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// copy or use the software.
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//
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//
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// Intel License Agreement
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// For Open Source Computer Vision Library
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//
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// Copyright (C) 2000, Intel Corporation, all rights reserved.
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// Third party copyrights are property of their respective owners.
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//
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// Redistribution and use in source and binary forms, with or without modification,
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// are permitted provided that the following conditions are met:
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//
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// * Redistribution's of source code must retain the above copyright notice,
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// this list of conditions and the following disclaimer.
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//
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// * Redistribution's in binary form must reproduce the above copyright notice,
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// this list of conditions and the following disclaimer in the documentation
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// and/or other materials provided with the distribution.
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//
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// * The name of Intel Corporation may not be used to endorse or promote products
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// derived from this software without specific prior written permission.
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//
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// This software is provided by the copyright holders and contributors "as is" and
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// any express or implied warranties, including, but not limited to, the implied
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// warranties of merchantability and fitness for a particular purpose are disclaimed.
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// In no event shall the Intel Corporation or contributors be liable for any direct,
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// indirect, incidental, special, exemplary, or consequential damages
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// (including, but not limited to, procurement of substitute goods or services;
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// loss of use, data, or profits; or business interruption) however caused
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// and on any theory of liability, whether in contract, strict liability,
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// or tort (including negligence or otherwise) arising in any way out of
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// the use of this software, even if advised of the possibility of such damage.
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//
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//M*/
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#ifndef _GRFMT_BASE_H_
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#define _GRFMT_BASE_H_
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#if _MSC_VER >= 1200
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#pragma warning( disable: 4514 )
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#pragma warning( disable: 4711 )
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#pragma warning( disable: 4611 )
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#endif
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#include "utils.h"
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#include "bitstrm.h"
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#define RBS_BAD_HEADER -125 /* invalid image header */
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#define BAD_HEADER_ERR() goto bad_header_exit
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#ifndef _MAX_PATH
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#define _MAX_PATH 1024
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#endif
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///////////////////////////////// base class for readers ////////////////////////
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class GrFmtReader
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{
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public:
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GrFmtReader( const char* filename );
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virtual ~GrFmtReader();
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int GetWidth() { return m_width; };
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int GetHeight() { return m_height; };
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bool IsColor() { return m_iscolor; };
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int GetDepth() { return m_bit_depth; };
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void UseNativeDepth( bool yes ) { m_native_depth = yes; };
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bool IsFloat() { return m_isfloat; };
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virtual bool ReadHeader() = 0;
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virtual bool ReadData( uchar* data, int step, int color ) = 0;
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virtual void Close();
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protected:
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bool m_iscolor;
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int m_width; // width of the image ( filled by ReadHeader )
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int m_height; // height of the image ( filled by ReadHeader )
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int m_bit_depth;// bit depth per channel (normally 8)
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char m_filename[_MAX_PATH]; // filename
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bool m_native_depth;// use the native bit depth of the image
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bool m_isfloat; // is image saved as float or double?
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};
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///////////////////////////// base class for writers ////////////////////////////
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class GrFmtWriter
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{
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public:
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GrFmtWriter( const char* filename );
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virtual ~GrFmtWriter() {};
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virtual bool IsFormatSupported( int depth );
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virtual bool WriteImage( const uchar* data, int step,
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int width, int height, int depth, int channels ) = 0;
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protected:
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char m_filename[_MAX_PATH]; // filename
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};
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////////////////////////////// base class for filter factories //////////////////
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class GrFmtFilterFactory
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{
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public:
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GrFmtFilterFactory();
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virtual ~GrFmtFilterFactory() {};
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const char* GetDescription() { return m_description; };
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int GetSignatureLength() { return m_sign_len; };
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virtual bool CheckFile( const char* filename );
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virtual bool CheckSignature( const char* signature );
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virtual bool CheckExtension( const char* filename );
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virtual GrFmtReader* NewReader( const char* filename ) = 0;
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virtual GrFmtWriter* NewWriter( const char* filename ) = 0;
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protected:
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const char* m_description;
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// graphic format description in form:
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// <Some textual description>( *.<extension1> [; *.<extension2> ...]).
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// the textual description can not contain symbols '(', ')'
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// and may be, some others. It is safe to use letters, digits and spaces only.
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// e.g. "Targa (*.tga)",
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// or "Portable Graphic Format (*.pbm;*.pgm;*.ppm)"
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int m_sign_len; // length of the signature of the format
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const char* m_signature; // signature of the format
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};
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/////////////////////////// list of graphic format filters ///////////////////////////////
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typedef void* ListPosition;
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class GrFmtFactoriesList
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{
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public:
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GrFmtFactoriesList();
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virtual ~GrFmtFactoriesList();
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void RemoveAll();
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bool AddFactory( GrFmtFilterFactory* factory );
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int FactoriesCount() { return m_curFactories; };
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ListPosition GetFirstFactoryPos();
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GrFmtFilterFactory* GetNextFactory( ListPosition& pos );
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virtual GrFmtReader* FindReader( const char* filename );
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virtual GrFmtWriter* FindWriter( const char* filename );
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protected:
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GrFmtFilterFactory** m_factories;
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int m_maxFactories;
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int m_curFactories;
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};
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#endif/*_GRFMT_BASE_H_*/
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