mirror of
https://github.com/qpdf/qpdf.git
synced 2024-05-31 01:10:51 +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.
98 lines
2.0 KiB
C++
98 lines
2.0 KiB
C++
#include <qpdf/Pl_DCT.hh>
|
|
#include <qpdf/Pl_StdioFile.hh>
|
|
#include <qpdf/QUtil.hh>
|
|
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
#include <iostream>
|
|
#include <stdlib.h>
|
|
|
|
static void usage()
|
|
{
|
|
std::cerr << "Usage: dct_compress infile outfile width height"
|
|
<< " {rgb|cmyk|gray}" << std::endl;
|
|
exit(2);
|
|
}
|
|
|
|
class Callback: public Pl_DCT::CompressConfig
|
|
{
|
|
public:
|
|
Callback() :
|
|
called(false)
|
|
{
|
|
}
|
|
virtual ~Callback()
|
|
{
|
|
}
|
|
virtual void apply(jpeg_compress_struct*);
|
|
bool called;
|
|
};
|
|
|
|
void Callback::apply(jpeg_compress_struct*)
|
|
{
|
|
this->called = true;
|
|
}
|
|
|
|
int main(int argc, char* argv[])
|
|
{
|
|
if (argc != 6)
|
|
{
|
|
usage();
|
|
}
|
|
|
|
char* infilename = argv[1];
|
|
char* outfilename = argv[2];
|
|
JDIMENSION width = QUtil::string_to_uint(argv[3]);
|
|
JDIMENSION height = QUtil::string_to_uint(argv[4]);
|
|
char* colorspace = argv[5];
|
|
J_COLOR_SPACE cs =
|
|
((strcmp(colorspace, "rgb") == 0) ? JCS_RGB :
|
|
(strcmp(colorspace, "cmyk") == 0) ? JCS_CMYK :
|
|
(strcmp(colorspace, "gray") == 0) ? JCS_GRAYSCALE :
|
|
JCS_UNKNOWN);
|
|
int components = 0;
|
|
switch (cs)
|
|
{
|
|
case JCS_RGB:
|
|
components = 3;
|
|
break;
|
|
case JCS_CMYK:
|
|
components = 4;
|
|
break;
|
|
case JCS_GRAYSCALE:
|
|
components = 1;
|
|
break;
|
|
default:
|
|
usage();
|
|
break;
|
|
}
|
|
|
|
FILE* infile = QUtil::safe_fopen(infilename, "rb");
|
|
FILE* outfile = QUtil::safe_fopen(outfilename, "wb");
|
|
Pl_StdioFile out("stdout", outfile);
|
|
unsigned char buf[100];
|
|
bool done = false;
|
|
Callback callback;
|
|
Pl_DCT dct("dct", &out, width, height, components, cs, &callback);
|
|
while (! done)
|
|
{
|
|
size_t len = fread(buf, 1, sizeof(buf), infile);
|
|
if (len <= 0)
|
|
{
|
|
done = true;
|
|
}
|
|
else
|
|
{
|
|
dct.write(buf, len);
|
|
}
|
|
}
|
|
dct.finish();
|
|
if (! callback.called)
|
|
{
|
|
std::cout << "Callback was not called" << std::endl;
|
|
}
|
|
fclose(infile);
|
|
fclose(outfile);
|
|
return 0;
|
|
}
|