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40 lines
966 B
C++
40 lines
966 B
C++
#ifndef __PL_TIFFPREDICTOR_HH__
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#define __PL_TIFFPREDICTOR_HH__
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// This pipeline reverses the application of a TIFF predictor as
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// described in the TIFF specification.
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#include <qpdf/Pipeline.hh>
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class Pl_TIFFPredictor: public Pipeline
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{
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public:
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enum action_e { a_encode, a_decode };
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QPDF_DLL
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Pl_TIFFPredictor(char const* identifier, Pipeline* next,
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action_e action, unsigned int columns,
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unsigned int samples_per_pixel = 1,
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unsigned int bits_per_sample = 8);
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QPDF_DLL
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virtual ~Pl_TIFFPredictor();
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QPDF_DLL
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virtual void write(unsigned char* data, size_t len);
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QPDF_DLL
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virtual void finish();
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private:
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void processRow();
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action_e action;
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unsigned int columns;
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unsigned int bytes_per_row;
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unsigned int samples_per_pixel;
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unsigned int bits_per_sample;
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unsigned char* cur_row;
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size_t pos;
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};
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#endif // __PL_TIFFPREDICTOR_HH__
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