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https://github.com/qpdf/qpdf.git
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100 lines
2.3 KiB
C++
100 lines
2.3 KiB
C++
#include <qpdf/Pl_PNGFilter.hh>
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#include <qpdf/Pl_TIFFPredictor.hh>
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#include <qpdf/Pl_StdioFile.hh>
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#include <qpdf/QUtil.hh>
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#include <iostream>
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#include <errno.h>
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#include <assert.h>
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#include <string.h>
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#include <stdlib.h>
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void run(char const* filename, char const* filter,
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bool encode, unsigned int columns,
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int bits_per_sample, int samples_per_pixel)
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{
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FILE* in = QUtil::safe_fopen(filename, "rb");
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FILE* o1 = QUtil::safe_fopen("out", "wb");
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Pipeline* out = new Pl_StdioFile("out", o1);
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Pipeline* pl = 0;
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if (strcmp(filter, "png") == 0)
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{
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pl = new Pl_PNGFilter(
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"png", out,
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encode ? Pl_PNGFilter::a_encode : Pl_PNGFilter::a_decode,
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columns, samples_per_pixel, bits_per_sample);
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}
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else if (strcmp(filter, "tiff") == 0)
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{
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pl = new Pl_TIFFPredictor(
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"png", out,
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encode ? Pl_TIFFPredictor::a_encode : Pl_TIFFPredictor::a_decode,
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columns, samples_per_pixel, bits_per_sample);
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}
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else
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{
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std::cerr << "unknown filter " << filter << std::endl;
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exit(2);
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}
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assert((2 * (columns + 1)) < 1024);
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unsigned char buf[1024];
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size_t len;
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while (true)
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{
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len = fread(buf, 1, (2 * columns) + 1, in);
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if (len == 0)
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{
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break;
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}
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pl->write(buf, len);
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len = fread(buf, 1, 1, in);
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if (len == 0)
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{
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break;
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}
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pl->write(buf, len);
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len = fread(buf, 1, 1, in);
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if (len == 0)
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{
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break;
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}
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pl->write(buf, len);
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}
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pl->finish();
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delete pl;
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delete out;
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fclose(o1);
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fclose(in);
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std::cout << "done" << std::endl;
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}
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int main(int argc, char* argv[])
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{
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if (argc != 7)
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{
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std::cerr << "Usage: predictor {png|tiff} {en,de}code filename"
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<< " columns samples-per-pixel bits-per-sample"
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<< std::endl;
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exit(2);
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}
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char* filter = argv[1];
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bool encode = (strcmp(argv[2], "encode") == 0);
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char* filename = argv[3];
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int columns = QUtil::string_to_int(argv[4]);
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int samples_per_pixel = QUtil::string_to_int(argv[5]);
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int bits_per_sample = QUtil::string_to_int(argv[6]);
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try
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{
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run(filename, filter, encode,
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columns, bits_per_sample, samples_per_pixel);
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}
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catch (std::exception& e)
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{
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std::cout << e.what() << std::endl;
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}
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return 0;
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}
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