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102 lines
2.6 KiB
C++
102 lines
2.6 KiB
C++
#include <qpdf/assert_test.h>
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#include <qpdf/Pl_PNGFilter.hh>
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#include <qpdf/Pl_StdioFile.hh>
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#include <qpdf/Pl_TIFFPredictor.hh>
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#include <qpdf/QIntC.hh>
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#include <qpdf/QUtil.hh>
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#include <iostream>
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#include <cstdlib>
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#include <cstring>
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void
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run(char const* filename,
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char const* filter,
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bool encode,
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unsigned int columns,
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unsigned int bits_per_sample,
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unsigned 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 = nullptr;
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if (strcmp(filter, "png") == 0) {
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pl = new Pl_PNGFilter(
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"png",
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out,
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encode ? Pl_PNGFilter::a_encode : Pl_PNGFilter::a_decode,
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columns,
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samples_per_pixel,
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bits_per_sample);
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} else if (strcmp(filter, "tiff") == 0) {
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pl = new Pl_TIFFPredictor(
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"png",
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out,
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encode ? Pl_TIFFPredictor::a_encode : Pl_TIFFPredictor::a_decode,
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columns,
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samples_per_pixel,
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bits_per_sample);
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} else {
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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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len = fread(buf, 1, (2 * columns) + 1, in);
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if (len == 0) {
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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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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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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
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main(int argc, char* argv[])
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{
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if (argc != 7) {
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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" << 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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run(filename,
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filter,
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encode,
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QIntC::to_uint(columns),
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QIntC::to_uint(bits_per_sample),
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QIntC::to_uint(samples_per_pixel));
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} catch (std::exception& e) {
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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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