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add double-page-size example
git-svn-id: svn+q:///qpdf/trunk@996 71b93d88-0707-0410-a8cf-f5a4172ac649
This commit is contained in:
Jay Berkenbilt
parent
2dbc1006fb
commit
9ba5b27ce4
@ -1,5 +1,9 @@
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2010-08-05 Jay Berkenbilt <ejb@ql.org>
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* Add QPDFObjectHandle::addPageContents, a convenience routine for
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appending or prepending new streams to a page's content streams.
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The "double-page-size" example illustrates its use.
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* Add new methods to QPDFObjectHandle: replaceStreamData and
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newStream. These methods allow users of the qpdf library to add
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new streams and to replace data of existing streams. Examples are
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8
TODO
8
TODO
@ -7,9 +7,9 @@ Next
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in August, 2009. He seems to like to send encrypted mail (key
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01FCC336). Tell him about newStream and replaceStreamData.
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* Tell stronghorse@tom.com about QPDFObjectHandle::addPageContents.
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See message from stronghorse@tom.com ("Suggestion for qpdf") from
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2010-06-09 and my response.
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* Tell stronghorse@tom.com about QPDFObjectHandle::addPageContents
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and double-page-size example. See message from stronghorse@tom.com
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("Suggestion for qpdf") from 2010-06-09 and my response.
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2.2
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===
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@ -18,8 +18,6 @@ Next
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image. Use QPDF::getAllPages and QPDFObjectHandle::getPageImages
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along with new stream data and dictionary manipulation.
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* Add example program for addPageContents using suggestion from
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stronghorse@tom.com's message above.
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General
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=======
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@ -1,4 +1,4 @@
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BINS_examples = pdf-bookmarks pdf-mod-info pdf-npages
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BINS_examples = pdf-bookmarks pdf-mod-info pdf-npages double-page-size
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CBINS_examples = pdf-linearize
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TARGETS_examples = $(foreach B,$(BINS_examples) $(CBINS_examples),examples/$(OUTPUT_DIR)/$(call binname,$(B)))
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113
examples/double-page-size.cc
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113
examples/double-page-size.cc
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#include <iostream>
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#include <string.h>
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#include <stdlib.h>
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#include <qpdf/QPDF.hh>
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#include <qpdf/QUtil.hh>
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#include <qpdf/Buffer.hh>
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#include <qpdf/QPDFWriter.hh>
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static char const* whoami = 0;
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void usage()
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{
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std::cerr << "Usage: " << whoami << " infile.pdf outfile.pdf [in-password]"
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<< std::endl
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<< "Double size of all pages in infile.pdf;"
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<< " write output to outfile.pdf" << std::endl;
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exit(2);
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}
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static void doubleBoxSize(QPDFObjectHandle& page, char const* box_name)
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{
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QPDFObjectHandle box = page.getKey(box_name);
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if (box.isNull())
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{
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return;
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}
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if (! (box.isArray() && (box.getArrayNItems() == 4)))
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{
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throw std::runtime_error(std::string("box ") + box_name +
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" is not an array of four elements");
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}
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std::vector<QPDFObjectHandle> doubled;
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for (unsigned int i = 0; i < 4; ++i)
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{
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doubled.push_back(
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QPDFObjectHandle::newReal(
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QUtil::double_to_string(
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box.getArrayItem(i).getNumericValue() * 2.0, 2)));
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}
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page.replaceKey(box_name, QPDFObjectHandle::newArray(doubled));
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}
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int main(int argc, char* argv[])
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{
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whoami = QUtil::getWhoami(argv[0]);
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// For libtool's sake....
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if (strncmp(whoami, "lt-", 3) == 0)
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{
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whoami += 3;
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}
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if (! ((argc == 3) || (argc == 4)))
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{
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usage();
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}
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char const* infilename = argv[1];
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char const* outfilename = argv[2];
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char const* password = (argc == 4) ? argv[3] : "";
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// Text to prepend to each page's contents
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char const* content = "2 0 0 2 0 0 cm\n";
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// Copy text into a buffer without the null terminator
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PointerHolder<Buffer> b = new Buffer(strlen(content));
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unsigned char* bp = b.getPointer()->getBuffer();
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memcpy(bp, (unsigned char*)content, strlen(content));
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try
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{
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QPDF qpdf;
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qpdf.processFile(infilename, password);
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std::vector<QPDFObjectHandle> pages = qpdf.getAllPages();
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for (std::vector<QPDFObjectHandle>::iterator iter = pages.begin();
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iter != pages.end(); ++iter)
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{
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QPDFObjectHandle& page = *iter;
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// Prepend the buffer to the page's contents
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page.addPageContents(QPDFObjectHandle::newStream(&qpdf, b), true);
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// Double the size of each of the content boxes
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doubleBoxSize(page, "/MediaBox");
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doubleBoxSize(page, "/CropBox");
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doubleBoxSize(page, "/BleedBox");
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doubleBoxSize(page, "/TrimBox");
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doubleBoxSize(page, "/ArtBox");
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}
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// Write out a new file
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QPDFWriter w(qpdf, outfilename);
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if (QUtil::get_env("IN_TESTSUITE"))
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{
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// For the test suite, uncompress streams and use static
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// IDs.
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w.setStaticID(true);
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w.setStreamDataMode(qpdf_s_uncompress);
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}
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w.write();
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std::cout << whoami << ": new file written to " << outfilename
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<< std::endl;
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}
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catch (std::exception &e)
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{
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std::cerr << whoami << " processing file " << infilename << ": "
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<< e.what() << std::endl;
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exit(2);
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}
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return 0;
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}
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31
examples/qtest/double-page-size.test
Normal file
31
examples/qtest/double-page-size.test
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#!/usr/bin/env perl
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require 5.008;
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BEGIN { $^W = 1; }
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use strict;
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chdir("double-page-size") or die "chdir testdir failed: $!\n";
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require TestDriver;
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my $td = new TestDriver('double-page-size');
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cleanup();
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$td->runtest("double page size",
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{$td->COMMAND => "double-page-size in.pdf a.pdf"},
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{$td->STRING => "double-page-size: new file written to a.pdf\n",
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$td->EXIT_STATUS => 0},
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$td->NORMALIZE_NEWLINES);
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$td->runtest("check output",
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{$td->FILE => "a.pdf"},
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{$td->FILE => "out.pdf"});
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cleanup();
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$td->report(2);
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sub cleanup
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{
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unlink 'a.pdf';
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}
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55
examples/qtest/double-page-size/in.pdf
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55
examples/qtest/double-page-size/in.pdf
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%PDF-1.3
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%¿÷¢þ
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1 0 obj
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<< /Pages 2 0 R /Type /Catalog >>
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endobj
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2 0 obj
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<< /Count 2 /Kids [ 3 0 R 4 0 R ] /Type /Pages >>
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endobj
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3 0 obj
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<< /Contents 5 0 R /MediaBox [ 0 0 612 792 ] /Parent 2 0 R /Resources << /Font << /F1 6 0 R >> /ProcSet 7 0 R >> /Type /Page >>
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endobj
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4 0 obj
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<< /Contents 8 0 R /MediaBox [ 0 0 612 792 ] /Parent 2 0 R /Resources << /Font << /F1 6 0 R >> /ProcSet 7 0 R >> /Type /Page >>
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endobj
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5 0 obj
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<< /Length 44 >>
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stream
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BT
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/F1 24 Tf
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72 720 Td
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(Potato) Tj
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ET
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endstream
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endobj
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6 0 obj
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<< /BaseFont /Helvetica /Encoding /WinAnsiEncoding /Name /F1 /Subtype /Type1 /Type /Font >>
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endobj
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7 0 obj
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[ /PDF /Text ]
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endobj
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8 0 obj
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<< /Length 43 >>
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stream
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BT
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/F1 24 Tf
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72 720 Td
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(Salad) Tj
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ET
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endstream
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endobj
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xref
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0 9
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0000000000 65535 f
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0000000015 00000 n
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0000000064 00000 n
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0000000129 00000 n
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0000000272 00000 n
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0000000415 00000 n
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0000000508 00000 n
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0000000615 00000 n
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0000000645 00000 n
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trailer << /Root 1 0 R /Size 9 /ID [<071a6499182be9cfc990b11d0c4e5bc0><90dbb2f2f000af76d1107187b0e00349>] >>
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startxref
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737
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%%EOF
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69
examples/qtest/double-page-size/out.pdf
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69
examples/qtest/double-page-size/out.pdf
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%PDF-1.3
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%¿÷¢þ
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1 0 obj
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<< /Pages 2 0 R /Type /Catalog >>
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endobj
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2 0 obj
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<< /Count 2 /Kids [ 3 0 R 4 0 R ] /Type /Pages >>
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endobj
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3 0 obj
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<< /Contents [ 5 0 R 6 0 R ] /MediaBox [ 0.00 0.00 1224.00 1584.00 ] /Parent 2 0 R /Resources << /Font << /F1 7 0 R >> /ProcSet 8 0 R >> /Type /Page >>
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endobj
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4 0 obj
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<< /Contents [ 9 0 R 10 0 R ] /MediaBox [ 0.00 0.00 1224.00 1584.00 ] /Parent 2 0 R /Resources << /Font << /F1 7 0 R >> /ProcSet 8 0 R >> /Type /Page >>
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endobj
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5 0 obj
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<< /Length 15 >>
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stream
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2 0 0 2 0 0 cm
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endstream
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endobj
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6 0 obj
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<< /Length 44 >>
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stream
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BT
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/F1 24 Tf
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72 720 Td
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(Potato) Tj
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ET
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endstream
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endobj
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7 0 obj
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<< /BaseFont /Helvetica /Encoding /WinAnsiEncoding /Name /F1 /Subtype /Type1 /Type /Font >>
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endobj
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8 0 obj
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[ /PDF /Text ]
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endobj
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9 0 obj
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<< /Length 15 >>
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stream
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2 0 0 2 0 0 cm
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endstream
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endobj
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10 0 obj
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<< /Length 43 >>
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stream
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BT
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/F1 24 Tf
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72 720 Td
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(Salad) Tj
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ET
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endstream
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endobj
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xref
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0 11
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0000000000 65535 f
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0000000015 00000 n
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0000000064 00000 n
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0000000129 00000 n
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0000000296 00000 n
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0000000464 00000 n
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0000000528 00000 n
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0000000621 00000 n
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0000000728 00000 n
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0000000758 00000 n
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0000000822 00000 n
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trailer << /Root 1 0 R /Size 11 /ID [<071a6499182be9cfc990b11d0c4e5bc0><31415926535897932384626433832795>] >>
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startxref
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915
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%%EOF
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