Pl_TIFFPredictor.hh
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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 };
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);
~Pl_TIFFPredictor() override = default;
void write(unsigned char const* data, size_t len) override;
void finish() override;
private:
void processRow();
action_e action;
unsigned int columns;
unsigned int bytes_per_row;
unsigned int samples_per_pixel;
unsigned int bits_per_sample;
std::shared_ptr<unsigned char> cur_row;
size_t pos;
};
#endif // PL_TIFFPREDICTOR_HH