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