rename

git-svn-id: svn+q:///qpdf/trunk@998 71b93d88-0707-0410-a8cf-f5a4172ac649

1 files changed, 113 insertions, 0 deletions

diff --git a/examples/pdf-double-page-size.cc b/examples/pdf-double-page-size.cc
new file mode 100644
index 00000000..e933b5ac
--- /dev/null
+++ b/examples/pdf-double-page-size.cc
@@ -0,0 +1,113 @@
+#include <iostream>
+#include <string.h>
+#include <stdlib.h>
+#include <qpdf/QPDF.hh>
+#include <qpdf/QUtil.hh>
+#include <qpdf/Buffer.hh>
+#include <qpdf/QPDFWriter.hh>
+
+static char const* whoami = 0;
+
+void usage()
+{
+    std::cerr << "Usage: " << whoami << " infile.pdf outfile.pdf [in-password]"
+	      << std::endl
+	      << "Double size of all pages in infile.pdf;"
+	      << " write output to outfile.pdf" << std::endl;
+    exit(2);
+}
+
+static void doubleBoxSize(QPDFObjectHandle& page, char const* box_name)
+{
+    QPDFObjectHandle box = page.getKey(box_name);
+    if (box.isNull())
+    {
+	return;
+    }
+    if (! (box.isArray() && (box.getArrayNItems() == 4)))
+    {
+	throw std::runtime_error(std::string("box ") + box_name +
+				 " is not an array of four elements");
+    }
+    std::vector<QPDFObjectHandle> doubled;
+    for (unsigned int i = 0; i < 4; ++i)
+    {
+	doubled.push_back(
+	    QPDFObjectHandle::newReal(
+		QUtil::double_to_string(
+		    box.getArrayItem(i).getNumericValue() * 2.0, 2)));
+    }
+    page.replaceKey(box_name, QPDFObjectHandle::newArray(doubled));
+}
+
+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 == 3) || (argc == 4)))
+    {
+	usage();
+    }
+
+    char const* infilename = argv[1];
+    char const* outfilename = argv[2];
+    char const* password = (argc == 4) ? argv[3] : "";
+
+    // Text to prepend to each page's contents
+    char const* content = "2 0 0 2 0 0 cm\n";
+
+    // Copy text into a buffer without the null terminator
+    PointerHolder<Buffer> b = new Buffer(strlen(content));
+    unsigned char* bp = b.getPointer()->getBuffer();
+    memcpy(bp, (unsigned char*)content, strlen(content));
+
+    try
+    {
+	QPDF qpdf;
+	qpdf.processFile(infilename, password);
+
+	std::vector<QPDFObjectHandle> pages = qpdf.getAllPages();
+	for (std::vector<QPDFObjectHandle>::iterator iter = pages.begin();
+	     iter != pages.end(); ++iter)
+	{
+	    QPDFObjectHandle& page = *iter;
+
+	    // Prepend the buffer to the page's contents
+	    page.addPageContents(QPDFObjectHandle::newStream(&qpdf, b), true);
+
+	    // Double the size of each of the content boxes
+	    doubleBoxSize(page, "/MediaBox");
+	    doubleBoxSize(page, "/CropBox");
+	    doubleBoxSize(page, "/BleedBox");
+	    doubleBoxSize(page, "/TrimBox");
+	    doubleBoxSize(page, "/ArtBox");
+	}
+
+	// Write out a new file
+	QPDFWriter w(qpdf, outfilename);
+	if (QUtil::get_env("IN_TESTSUITE"))
+	{
+	    // For the test suite, uncompress streams and use static
+	    // IDs.
+	    w.setStaticID(true);
+	    w.setStreamDataMode(qpdf_s_uncompress);
+	}
+	w.write();
+	std::cout << whoami << ": new file written to " << outfilename
+		  << std::endl;
+    }
+    catch (std::exception &e)
+    {
+	std::cerr << whoami << " processing file " << infilename << ": "
+		  << e.what() << std::endl;
+	exit(2);
+    }
+
+    return 0;
+}