OpenSystemsDevelopment / qpdf

Commit 9f8aba1db7f101e424cbc2c742abe92868cc4bff

Authored by Jay Berkenbilt
1 parent b0a96ce6

Handle indirect stream filter/decode parameters 

QPDFWriter was trying to make /Filter and /DecodeParms direct in all
cases, but there are some cases where /DecodeParms may refer to a
stream, which can't be direct. QPDFWriter doesn't actually need
/DecodeParms to be direct in that case because it won't be able to
filter the stream. Until we can handle this type of stream, just don't
make /Filter and /DecodeParms direct if we can't filter the stream
anyway.

Fixes #34
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Showing 5 changed files with 150 additions and 3 deletions
ChangeLog
  View file @9f8aba1
  1 +2014-06-07 Jay Berkenbilt <ejb@ql.org>
  2 +
  3 + * Bug fix: don't fail on files that contain streams where /Filter
  4 + or /DecodeParms references a stream. Before, qpdf would try to
  5 + convert these to direct objects, which would fail because of the
  6 + stream.
  7 +
1 8 2014-02-22 Jay Berkenbilt <ejb@ql.org>
2 9  
3 10 * Bug fix: if the last object in the first part of a linearized
... ...
libqpdf/QPDFWriter.cc
  View file @9f8aba1
... ... @@ -2051,11 +2051,14 @@ QPDFWriter::prepareFileForWrite()
2051 2051 {
2052 2052 bool is_stream = false;
2053 2053 bool is_root = false;
  2054 + bool filterable = false;
2054 2055 QPDFObjectHandle dict = node;
2055 2056 if (node.isStream())
2056 2057 {
2057 2058 is_stream = true;
2058 2059 dict = node.getDict();
  2060 + // See whether we are able to filter this stream.
  2061 + filterable = node.pipeStreamData(0, true, false, false);
2059 2062 }
2060 2063 else if (pdf.getRoot().getObjectID() == node.getObjectID())
2061 2064 {
... ... @@ -2073,8 +2076,9 @@ QPDFWriter::prepareFileForWrite()
2073 2076 {
2074 2077 if (oh.isIndirect() &&
2075 2078 ((key == "/Length") ||
2076   - (key == "/Filter") ||
2077   - (key == "/DecodeParms")))
  2079 + (filterable &&
  2080 + ((key == "/Filter") ||
  2081 + (key == "/DecodeParms")))))
2078 2082 {
2079 2083 QTC::TC("qpdf", "QPDFWriter make stream key direct");
2080 2084 add_to_queue = false;
... ...
qpdf/qtest/qpdf.test
  View file @9f8aba1
... ... @@ -199,7 +199,7 @@ $td-&gt;runtest(&quot;remove page we don&#39;t have&quot;,
199 199 show_ntests();
200 200 # ----------
201 201 $td->notify("--- Miscellaneous Tests ---");
202   -$n_tests += 70;
  202 +$n_tests += 72;
203 203  
204 204 $td->runtest("qpdf version",
205 205 {$td->COMMAND => "qpdf --version"},
... ... @@ -546,6 +546,14 @@ $td-&gt;runtest(&quot;sanity check array size&quot;,
546 546 $td->EXIT_STATUS => 2},
547 547 $td->NORMALIZE_NEWLINES);
548 548  
  549 +$td->runtest("stream with indirect decode parms",
  550 + {$td->COMMAND =>
  551 + "qpdf --static-id indirect-decode-parms.pdf a.pdf"},
  552 + {$td->STRING => "", $td->EXIT_STATUS => 0});
  553 +$td->runtest("check file",
  554 + {$td->FILE => "a.pdf"},
  555 + {$td->FILE => "indirect-decode-parms-out.pdf"});
  556 +
549 557 show_ntests();
550 558 # ----------
551 559 $td->notify("--- Numeric range parsing tests ---");
... ...
qpdf/qtest/qpdf/indirect-decode-parms-out.pdf 0 → 100644
View file @9f8aba1
No preview for this file type
qpdf/qtest/qpdf/indirect-decode-parms.pdf 0 → 100644
  View file @9f8aba1
  1 +%PDF-1.3
  2 +%¿÷¢þ
  3 +%QDF-1.0
  4 +
  5 +1 0 obj
  6 +<<
  7 + /Pages 2 0 R
  8 + /Type /Catalog
  9 +>>
  10 +endobj
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  12 +2 0 obj
  13 +<<
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  15 + /Kids [
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  17 + ]
  18 + /Type /Pages
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  23 +3 0 obj
  24 +<<
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  52 + (Potato) Tj
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  61 +6 0 obj
  62 +<<
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  69 +endobj
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  71 +7 0 obj
  72 +[
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  74 + /Text
  75 +]
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  78 +8 0 obj
  79 +<<
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  81 + /Filter /Something
  82 + /DecodeParms 10 0 R
  83 +>>
  84 +stream
  85 +here is some stream data
  86 +endstream
  87 +endobj
  88 +
  89 +9 0 obj
  90 +25
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  93 +10 0 obj
  94 +<<
  95 + /Length 11 0 R
  96 +>>
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  98 +here is some stream data
  99 +endstream
  100 +endobj
  101 +
  102 +11 0 obj
  103 +25
  104 +endobj
  105 +
  106 +xref
  107 +0 12
  108 +0000000000 65535 f
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  120 +trailer <<
  121 + /Root 1 0 R
  122 + /Size 12
  123 + /QTest 8 0 R
  124 + /ID [<3e1b045415cfe83fea12b9817e205ef6><3e1b045415cfe83fea12b9817e205ef6>]
  125 +>>
  126 +startxref
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  128 +%%EOF
... ...