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#include <qpdf/QPDF.hh>
#include <qpdf/QPDFWriter.hh>
#include <qpdf/QPDFObjectHandle.hh>
#include <qpdf/QUtil.hh>
#include <iostream>
#include <string.h>
#include <stdlib.h>
static char const* whoami = 0;
// This is a simple StreamDataProvider that writes image data for an
// orange square of the given width and height.
class ImageProvider: public QPDFObjectHandle::StreamDataProvider
{
public:
ImageProvider(int width, int height);
virtual ~ImageProvider();
virtual void provideStreamData(int objid, int generation,
Pipeline* pipeline);
private:
int width;
int height;
};
ImageProvider::ImageProvider(int width, int height) :
width(width),
height(height)
{
}
ImageProvider::~ImageProvider()
{
}
void
ImageProvider::provideStreamData(int objid, int generation,
Pipeline* pipeline)
{
for (int i = 0; i < width * height; ++i)
{
pipeline->write((unsigned char*)"\xff\x7f\x00", 3);
}
pipeline->finish();
}
void usage()
{
std::cerr << "Usage: " << whoami << " filename" << std::endl
<< "Creates a simple PDF and writes it to filename" << std::endl;
exit(2);
}
static QPDFObjectHandle createPageContents(QPDF& pdf, std::string const& text)
{
// Create a stream that displays our image and the given text in
// our font.
std::string contents =
"BT /F1 24 Tf 72 720 Td (" + text + ") Tj ET\n"
"q 144 0 0 144 234 324 cm /Im1 Do Q\n";
return QPDFObjectHandle::newStream(&pdf, contents);
}
QPDFObjectHandle newName(std::string const& name)
{
return QPDFObjectHandle::newName(name);
}
QPDFObjectHandle newInteger(int val)
{
return QPDFObjectHandle::newInteger(val);
}
static void create_pdf(char const* filename)
{
QPDF pdf;
// Start with an empty PDF that has no pages or non-required objects.
pdf.emptyPDF();
// Add an indirect object to contain a font descriptor for the
// built-in Helvetica font.
QPDFObjectHandle font = pdf.makeIndirectObject(
QPDFObjectHandle::parse(
"<<"
" /Type /Font"
" /Subtype /Type1"
" /Name /F1"
" /BaseFont /Helvetica"
" /Encoding /WinAnsiEncoding"
">>"));
// Create a stream to encode our image. We don't have to set the
// length or filters. QPDFWriter will fill in the length and
// compress the stream data using FlateDecode by default.
QPDFObjectHandle image = QPDFObjectHandle::newStream(&pdf);
image.replaceDict(QPDFObjectHandle::parse(
"<<"
" /Type /XObject"
" /Subtype /Image"
" /ColorSpace /DeviceRGB"
" /BitsPerComponent 8"
" /Width 100"
" /Height 100"
">>"));
// Provide the stream data.
ImageProvider* p = new ImageProvider(100, 100);
PointerHolder<QPDFObjectHandle::StreamDataProvider> provider(p);
image.replaceStreamData(provider,
QPDFObjectHandle::newNull(),
QPDFObjectHandle::newNull());
// Create direct objects as needed by the page dictionary.
QPDFObjectHandle procset = QPDFObjectHandle::parse(
"[/PDF /Text /ImageC]");
QPDFObjectHandle rfont = QPDFObjectHandle::newDictionary();
rfont.replaceKey("/F1", font);
QPDFObjectHandle xobject = QPDFObjectHandle::newDictionary();
xobject.replaceKey("/Im1", image);
QPDFObjectHandle resources = QPDFObjectHandle::newDictionary();
resources.replaceKey("/ProcSet", procset);
resources.replaceKey("/Font", rfont);
resources.replaceKey("/XObject", xobject);
QPDFObjectHandle mediabox = QPDFObjectHandle::newArray();
mediabox.appendItem(newInteger(0));
mediabox.appendItem(newInteger(0));
mediabox.appendItem(newInteger(612));
mediabox.appendItem(newInteger(792));
// Create the page content stream
QPDFObjectHandle contents = createPageContents(
pdf, "Look at the pretty, orange square!");
// Create the page dictionary
QPDFObjectHandle page = pdf.makeIndirectObject(
QPDFObjectHandle::newDictionary());
page.replaceKey("/Type", newName("/Page"));
page.replaceKey("/MediaBox", mediabox);
page.replaceKey("/Contents", contents);
page.replaceKey("/Resources", resources);
// Add the page to the PDF file
pdf.addPage(page, true);
// Write the results. A real application would not call
// setStaticID here, but this example does it for the sake of its
// test suite.
QPDFWriter w(pdf, filename);
w.setStaticID(true); // for testing only
w.write();
}
int main(int argc, char* argv[])
{
whoami = QUtil::getWhoami(argv[0]);
// For libtool's sake....
if (strncmp(whoami, "lt-", 3) == 0)
{
whoami += 3;
}
if (argc != 2)
{
usage();
}
char const* filename = argv[1];
try
{
create_pdf(filename);
}
catch (std::exception& e)
{
std::cerr << e.what() << std::endl;
exit(2);
}
return 0;
}
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