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