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#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;
}
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