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addPageContents
git-svn-id: svn+q:///qpdf/trunk@995 71b93d88-0707-0410-a8cf-f5a4172ac649
This commit is contained in:
Jay Berkenbilt
parent
c292442962
commit
2dbc1006fb
@ -1,3 +1,10 @@
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2010-08-05 Jay Berkenbilt <ejb@ql.org>
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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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provided.
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2010-06-06 Jay Berkenbilt <ejb@ql.org>
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* Fix memory leak for QPDF objects whose underlying PDF objects
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13
TODO
13
TODO
@ -7,20 +7,19 @@ 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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2.2
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===
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* Add helper routines for manipulating page content streams.
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Operations should include ability to convert page contents from a
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stream to an array of streams and to append or prepend to the page
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contents. See message from stronghorse@tom.com ("Suggestion for
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qpdf") from 2010-06-09 and my response. Consider providing an
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example program that adds the line he suggests.
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* Create an example that does some kind of manipulation on every
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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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@ -288,14 +288,22 @@ class QPDFObjectHandle
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QPDF_DLL
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std::map<std::string, QPDFObjectHandle> getPageImages();
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// Throws an exception if this is not a Page object. Returns a
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// vector of stream objects representing the content streams for
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// the given page. This routine allows the caller to not care
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// whether there are one or more than one content streams for a
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// page.
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// Returns a vector of stream objects representing the content
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// streams for the given page. This routine allows the caller to
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// not care whether there are one or more than one content streams
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// for a page. Throws an exception if this is not a Page object.
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QPDF_DLL
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std::vector<QPDFObjectHandle> getPageContents();
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// Add the given object as a new content stream for this page. If
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// parameter 'first' is true, add to the beginning. Otherwise,
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// add to the end. This routine automatically converts the page
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// contents to an array if it is a scalar, allowing the caller not
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// to care what the initial structure is. Throws an exception if
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// this is not a Page object.
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QPDF_DLL
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void addPageContents(QPDFObjectHandle contents, bool first);
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// Initializers for objects. This Factory class gives the QPDF
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// class specific permission to call factory methods without
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// making it a friend of the whole QPDFObjectHandle class.
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@ -472,6 +472,35 @@ QPDFObjectHandle::getPageContents()
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return result;
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}
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void
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QPDFObjectHandle::addPageContents(QPDFObjectHandle new_contents, bool first)
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{
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assertPageObject();
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new_contents.assertType("Stream", new_contents.isStream());
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std::vector<QPDFObjectHandle> orig_contents = getPageContents();
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std::vector<QPDFObjectHandle> content_streams;
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if (first)
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{
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QTC::TC("qpdf", "QPDFObjectHandle prepend page contents");
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content_streams.push_back(new_contents);
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}
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for (std::vector<QPDFObjectHandle>::iterator iter = orig_contents.begin();
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iter != orig_contents.end(); ++iter)
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{
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QTC::TC("qpdf", "QPDFObjectHandle append page contents");
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content_streams.push_back(*iter);
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}
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if (! first)
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{
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content_streams.push_back(new_contents);
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}
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QPDFObjectHandle contents = QPDFObjectHandle::newArray(content_streams);
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this->replaceKey("/Contents", contents);
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}
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std::string
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QPDFObjectHandle::unparse()
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{
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@ -181,3 +181,5 @@ QPDF_Stream provider length mismatch 0
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QPDFObjectHandle newStream 0
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QPDFObjectHandle newStream with data 0
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QPDF_Stream pipe no stream data 0
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QPDFObjectHandle prepend page contents 0
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QPDFObjectHandle append page contents 0
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@ -76,26 +76,8 @@ flush_tiff_cache();
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show_ntests();
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# ----------
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$td->notify("--- Miscellaneous Tests ---");
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$n_tests += 28;
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$td->runtest("qpdf version",
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{$td->COMMAND => "qpdf --version"},
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{$td->REGEXP => "qpdf version \\S+\n.*", $td->EXIT_STATUS => 0},
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$td->NORMALIZE_NEWLINES);
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$td->runtest("C API: qpdf version",
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{$td->COMMAND => "qpdf-ctest --version"},
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{$td->REGEXP => "qpdf-ctest version \\S+\n",
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$td->EXIT_STATUS => 0},
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$td->NORMALIZE_NEWLINES);
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foreach (my $i = 1; $i <= 3; ++$i)
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{
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$td->runtest("misc tests",
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{$td->COMMAND => "test_driver 5 misc-$i.pdf"},
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{$td->FILE => "misc-$i.out", $td->EXIT_STATUS => 0},
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$td->NORMALIZE_NEWLINES);
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}
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$td->notify("--- Stream Replacement Tests ---");
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$n_tests += 8;
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$td->runtest("replace stream data",
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{$td->COMMAND => "test_driver 7 qstream.pdf"},
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@ -118,6 +100,36 @@ $td->runtest("new streams",
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$td->runtest("new stream",
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{$td->FILE => "a.pdf"},
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{$td->FILE => "new-streams.pdf"});
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$td->runtest("add page contents",
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{$td->COMMAND => "test_driver 10 minimal.pdf"},
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{$td->STRING => "test 10 done\n", $td->EXIT_STATUS => 0},
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$td->NORMALIZE_NEWLINES);
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$td->runtest("new stream",
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{$td->FILE => "a.pdf"},
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{$td->FILE => "add-contents.pdf"});
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show_ntests();
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# ----------
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$td->notify("--- Miscellaneous Tests ---");
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$n_tests += 22;
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$td->runtest("qpdf version",
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{$td->COMMAND => "qpdf --version"},
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{$td->REGEXP => "qpdf version \\S+\n.*", $td->EXIT_STATUS => 0},
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$td->NORMALIZE_NEWLINES);
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$td->runtest("C API: qpdf version",
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{$td->COMMAND => "qpdf-ctest --version"},
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{$td->REGEXP => "qpdf-ctest version \\S+\n",
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$td->EXIT_STATUS => 0},
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$td->NORMALIZE_NEWLINES);
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foreach (my $i = 1; $i <= 3; ++$i)
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{
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$td->runtest("misc tests",
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{$td->COMMAND => "test_driver 5 misc-$i.pdf"},
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{$td->FILE => "misc-$i.out", $td->EXIT_STATUS => 0},
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$td->NORMALIZE_NEWLINES);
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}
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# Make sure we ignore decode parameters that we don't understand
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$td->runtest("unknown decode parameters",
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54
qpdf/qtest/qpdf/add-contents.pdf
Normal file
54
qpdf/qtest/qpdf/add-contents.pdf
Normal file
@ -0,0 +1,54 @@
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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 1 /Kids [ 3 0 R ] /Type /Pages >>
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endobj
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3 0 obj
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<< /Contents [ 4 0 R 5 0 R 6 0 R ] /MediaBox [ 0 0 612 792 ] /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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<< /Length 37 >>
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stream
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BT /F1 12 Tf 72 620 Td (Baked) Tj ET
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endstream
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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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<< /Length 38 >>
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stream
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BT /F1 18 Tf 72 520 Td (Mashed) Tj 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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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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0000000123 00000 n
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0000000282 00000 n
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0000000368 00000 n
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0000000461 00000 n
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0000000548 00000 n
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0000000655 00000 n
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trailer << /Root 1 0 R /Size 9 /ID [<31415926535897932384626433832795><31415926535897932384626433832795>] >>
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startxref
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685
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%%EOF
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@ -427,6 +427,24 @@ void runtest(int n, char const* filename)
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w.setStreamDataMode(qpdf_s_preserve);
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w.write();
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}
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else if (n == 10)
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{
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PointerHolder<Buffer> b1 = new Buffer(37);
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unsigned char* bp = b1.getPointer()->getBuffer();
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memcpy(bp, (char*)"BT /F1 12 Tf 72 620 Td (Baked) Tj ET\n", 37);
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PointerHolder<Buffer> b2 = new Buffer(38);
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bp = b2.getPointer()->getBuffer();
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memcpy(bp, (char*)"BT /F1 18 Tf 72 520 Td (Mashed) Tj ET\n", 38);
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std::vector<QPDFObjectHandle> pages = pdf.getAllPages();
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pages[0].addPageContents(QPDFObjectHandle::newStream(&pdf, b1), true);
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pages[0].addPageContents(QPDFObjectHandle::newStream(&pdf, b2), false);
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QPDFWriter w(pdf, "a.pdf");
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w.setStaticID(true);
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w.setStreamDataMode(qpdf_s_preserve);
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w.write();
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}
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else
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{
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throw std::runtime_error(std::string("invalid test ") +
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