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11 //                For Open Source Computer Vision Library
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41 
42 #ifndef _GRFMT_PxM_H_
43 #define _GRFMT_PxM_H_
44 
45 #include "grfmt_base.h"
46 #include "bitstrm.h"
47 
48 
49 class GrFmtPxMReader : public GrFmtReader
50 {
51 public:
52 
53     GrFmtPxMReader( const char* filename );
54     ~GrFmtPxMReader();
55 
56     bool  CheckFormat( const char* signature );
57     bool  ReadData( uchar* data, int step, int color );
58     bool  ReadHeader();
59     void  Close();
60 
61 protected:
62 
63     RLByteStream    m_strm;
64     PaletteEntry    m_palette[256];
65     int             m_bpp;
66     int             m_offset;
67     bool            m_binary;
68     int             m_maxval;
69 };
70 
71 
72 class GrFmtPxMWriter : public GrFmtWriter
73 {
74 public:
75 
76     GrFmtPxMWriter( const char* filename );
77     ~GrFmtPxMWriter();
78 
79     bool  IsFormatSupported( int depth );
80 
81     bool  WriteImage( const uchar* data, int step,
82                       int width, int height, int depth, int channels );
83 protected:
84 
85     WLByteStream  m_strm;
86 };
87 
88 
89 // PxM filter factory
90 class GrFmtPxM : public GrFmtFilterFactory
91 {
92 public:
93 
94     GrFmtPxM();
95     ~GrFmtPxM();
96 
97     GrFmtReader* NewReader( const char* filename );
98     GrFmtWriter* NewWriter( const char* filename );
99     bool CheckSignature( const char* signature );
100 };
101 
102 
103 #endif/*_GRFMT_PxM_H_*/
104