mirror of
https://github.com/qpdf/qpdf.git
synced 2024-12-23 03:18:59 +00:00
cb769c62e5
This comment expands all tabs using an 8-character tab-width. You should ignore this commit when using git blame or use git blame -w. In the early days, I used to use tabs where possible for indentation, since emacs did this automatically. In recent years, I have switched to only using spaces, which means qpdf source code has been a mixture of spaces and tabs. I have avoided cleaning this up because of not wanting gratuitous whitespaces change to cloud the output of git blame, but I changed my mind after discussing with users who view qpdf source code in editors/IDEs that have other tab widths by default and in light of the fact that I am planning to start applying automatic code formatting soon.
103 lines
2.6 KiB
C++
103 lines
2.6 KiB
C++
#include <qpdf/Pl_PNGFilter.hh>
|
|
#include <qpdf/Pl_TIFFPredictor.hh>
|
|
#include <qpdf/Pl_StdioFile.hh>
|
|
#include <qpdf/QUtil.hh>
|
|
#include <qpdf/QIntC.hh>
|
|
|
|
#include <iostream>
|
|
#include <errno.h>
|
|
#include <assert.h>
|
|
#include <string.h>
|
|
#include <stdlib.h>
|
|
|
|
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 = 0;
|
|
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 << std::endl;
|
|
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" << std::endl;
|
|
}
|
|
|
|
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"
|
|
<< std::endl;
|
|
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() << std::endl;
|
|
}
|
|
return 0;
|
|
}
|