OpenSystemsDevelopment / qpdf

Commit cfa2eb97fb9b38d62fd2cd8d54ab59bac503967f

Authored by Jay Berkenbilt
1 parent d926d780

Add page rotation (fixes #132)

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Showing 9 changed files with 1126 additions and 0 deletions
ChangeLog
  View file @cfa2eb9
1 2017-08-12 Jay Berkenbilt <ejb@ql.org> 1 2017-08-12 Jay Berkenbilt <ejb@ql.org>
2 2
  3 + * Add QPDFObjectHandle::rotatePage to apply rotation to a page
  4 + object. Add --rotate option to qpdf to specify page rotation from
  5 + the command line.
  6 +
3 * Provide --verbose option that causes qpdf to print an indication 7 * Provide --verbose option that causes qpdf to print an indication
4 of what files it is writing. 8 of what files it is writing.
5 9
include/qpdf/QPDFObjectHandle.hh
  View file @cfa2eb9
@@ -507,6 +507,13 @@ class QPDFObjectHandle @@ -507,6 +507,13 @@ class QPDFObjectHandle
507 QPDF_DLL 507 QPDF_DLL
508 void addPageContents(QPDFObjectHandle contents, bool first); 508 void addPageContents(QPDFObjectHandle contents, bool first);
509 509
  510 + // Rotate a page. If relative is false, set the rotation of the
  511 + // page to angle. Otherwise, add angle to the rotation of the
  512 + // page. Angle must be a multiple of 90. Adding 90 to the rotation
  513 + // rotates clockwise by 90 degrees.
  514 + QPDF_DLL
  515 + void rotatePage(int angle, bool relative);
  516 +
510 // Initializers for objects. This Factory class gives the QPDF 517 // Initializers for objects. This Factory class gives the QPDF
511 // class specific permission to call factory methods without 518 // class specific permission to call factory methods without
512 // making it a friend of the whole QPDFObjectHandle class. 519 // making it a friend of the whole QPDFObjectHandle class.
libqpdf/QPDFObjectHandle.cc
  View file @cfa2eb9
@@ -673,6 +673,62 @@ QPDFObjectHandle::addPageContents(QPDFObjectHandle new_contents, bool first) @@ -673,6 +673,62 @@ QPDFObjectHandle::addPageContents(QPDFObjectHandle new_contents, bool first)
673 this->replaceKey("/Contents", contents); 673 this->replaceKey("/Contents", contents);
674 } 674 }
675 675
  676 +void
  677 +QPDFObjectHandle::rotatePage(int angle, bool relative)
  678 +{
  679 + assertPageObject();
  680 + if ((angle % 90) != 0)
  681 + {
  682 + throw std::runtime_error(
  683 + "QPDF::rotatePage called with an"
  684 + " angle that is not a multiple of 90");
  685 + }
  686 + int new_angle = angle;
  687 + if (relative)
  688 + {
  689 + int old_angle = 0;
  690 + bool found_rotate = false;
  691 + QPDFObjectHandle cur_obj = *this;
  692 + bool searched_parent = false;
  693 + std::set<QPDFObjGen> visited;
  694 + while (! found_rotate)
  695 + {
  696 + if (visited.count(cur_obj.getObjGen()))
  697 + {
  698 + // Don't get stuck in an infinite loop
  699 + break;
  700 + }
  701 + if (! visited.empty())
  702 + {
  703 + searched_parent = true;
  704 + }
  705 + visited.insert(cur_obj.getObjGen());
  706 + if (cur_obj.getKey("/Rotate").isInteger())
  707 + {
  708 + found_rotate = true;
  709 + old_angle = cur_obj.getKey("/Rotate").getIntValue();
  710 + }
  711 + else if (cur_obj.getKey("/Parent").isDictionary())
  712 + {
  713 + cur_obj = cur_obj.getKey("/Parent");
  714 + }
  715 + else
  716 + {
  717 + break;
  718 + }
  719 + }
  720 + QTC::TC("qpdf", "QPDFObjectHandle found old angle",
  721 + searched_parent ? 0 : 1);
  722 + if ((old_angle % 90) != 0)
  723 + {
  724 + old_angle = 0;
  725 + }
  726 + new_angle += old_angle;
  727 + }
  728 + new_angle = (new_angle + 360) % 360;
  729 + replaceKey("/Rotate", QPDFObjectHandle::newInteger(new_angle));
  730 +}
  731 +
676 std::string 732 std::string
677 QPDFObjectHandle::unparse() 733 QPDFObjectHandle::unparse()
678 { 734 {
manual/qpdf-manual.xml
  View file @cfa2eb9
@@ -349,6 +349,26 @@ make @@ -349,6 +349,26 @@ make
349 </listitem> 349 </listitem>
350 </varlistentry> 350 </varlistentry>
351 <varlistentry> 351 <varlistentry>
  352 + <term><option>--rotate=[+|-]angle:page-range</option></term>
  353 + <listitem>
  354 + <para>
  355 + Apply rotation to specified pages. The
  356 + <option>page-range</option> portion of the option value has
  357 + the same format as page ranges in <xref
  358 + linkend="ref.page-selection"/>. The <option>angle</option>
  359 + portion of the parameter may be either 90, 180, or 270. If
  360 + preceded by <option>+</option> or <option>-</option>, the
  361 + angle is added to or subtracted from the specified pages'
  362 + original rotations. Otherwise the pages' rotations are set to
  363 + the exact value. For example, the command <command>qpdf in.pdf
  364 + out.pdf --rotate=+90:2,4,6 --rotate=180:7-8</command> would
  365 + rotate pages 2, 4, and 6 90 degrees clockwise from their
  366 + original rotation and force the rotation of pages 7 through 9
  367 + to 180 degrees regardless of their original rotation.
  368 + </para>
  369 + </listitem>
  370 + </varlistentry>
  371 + <varlistentry>
352 <term><option>--pages options --</option></term> 372 <term><option>--pages options --</option></term>
353 <listitem> 373 <listitem>
354 <para> 374 <para>
qpdf/qpdf.cc
  View file @cfa2eb9
@@ -37,6 +37,18 @@ struct PageSpec @@ -37,6 +37,18 @@ struct PageSpec
37 char const* range; 37 char const* range;
38 }; 38 };
39 39
  40 +struct RotationSpec
  41 +{
  42 + RotationSpec(int angle = 0, bool relative = false) :
  43 + angle(angle),
  44 + relative(relative)
  45 + {
  46 + }
  47 +
  48 + int angle;
  49 + bool relative;
  50 +};
  51 +
40 struct Options 52 struct Options
41 { 53 {
42 Options() : 54 Options() :
@@ -151,6 +163,7 @@ struct Options @@ -151,6 +163,7 @@ struct Options
151 bool show_page_images; 163 bool show_page_images;
152 bool check; 164 bool check;
153 std::vector<PageSpec> page_specs; 165 std::vector<PageSpec> page_specs;
  166 + std::map<std::string, RotationSpec> rotations;
154 bool require_outfile; 167 bool require_outfile;
155 char const* infilename; 168 char const* infilename;
156 char const* outfilename; 169 char const* outfilename;
@@ -209,6 +222,8 @@ Basic Options\n\ @@ -209,6 +222,8 @@ Basic Options\n\
209 --encrypt options -- generate an encrypted file\n\ 222 --encrypt options -- generate an encrypted file\n\
210 --decrypt remove any encryption on the file\n\ 223 --decrypt remove any encryption on the file\n\
211 --pages options -- select specific pages from one or more files\n\ 224 --pages options -- select specific pages from one or more files\n\
  225 +--rotate=[+|-]angle:page-range\n\
  226 + rotate each specified page 90, 180, or 270 degrees\n\
212 --split-pages=[n] write each output page to a separate file\n\ 227 --split-pages=[n] write each output page to a separate file\n\
213 \n\ 228 \n\
214 If none of --copy-encryption, --encrypt or --decrypt are given, qpdf will\n\ 229 If none of --copy-encryption, --encrypt or --decrypt are given, qpdf will\n\
@@ -219,6 +234,13 @@ parameters will be copied, including both user and owner passwords, even\n\ @@ -219,6 +234,13 @@ parameters will be copied, including both user and owner passwords, even\n\
219 if the user password is used to open the other file. This works even if\n\ 234 if the user password is used to open the other file. This works even if\n\
220 the owner password is not known.\n\ 235 the owner password is not known.\n\
221 \n\ 236 \n\
  237 +The --rotate flag can be used to specify pages to rotate pages either\n\
  238 +90, 180, or 270 degrees. The page range is specified in the same\n\
  239 +format as with the --pages option, described below. Repeat the option\n\
  240 +to rotate multiple groups of pages. If the angle is preceded by + or -,\n\
  241 +it is added to or subtracted from the original rotation. Otherwise, the\n\
  242 +rotation angle is set explicitly to the given value.\n\
  243 +\n\
222 If --split-pages is specified, each page is written to a separate output\n\ 244 If --split-pages is specified, each page is written to a separate output\n\
223 file. File names are generated as follows:\n\ 245 file. File names are generated as follows:\n\
224 * If the string %d appears in the output file name, it is replaced with a\n\ 246 * If the string %d appears in the output file name, it is replaced with a\n\
@@ -1148,6 +1170,62 @@ static void handle_help_verison(int argc, char* argv[]) @@ -1148,6 +1170,62 @@ static void handle_help_verison(int argc, char* argv[])
1148 } 1170 }
1149 } 1171 }
1150 1172
  1173 +static void parse_rotation_parameter(Options& o, std::string const& parameter)
  1174 +{
  1175 + std::string angle_str;
  1176 + std::string range;
  1177 + size_t colon = parameter.find(':');
  1178 + int relative = 0;
  1179 + if (colon != std::string::npos)
  1180 + {
  1181 + if (colon > 0)
  1182 + {
  1183 + angle_str = parameter.substr(0, colon);
  1184 + if (angle_str.length() > 0)
  1185 + {
  1186 + char first = angle_str.at(0);
  1187 + if ((first == '+') || (first == '-'))
  1188 + {
  1189 + relative = ((first == '+') ? 1 : -1);
  1190 + angle_str = angle_str.substr(1);
  1191 + }
  1192 + else if (! QUtil::is_digit(angle_str.at(0)))
  1193 + {
  1194 + angle_str = "";
  1195 + }
  1196 + }
  1197 + }
  1198 + if (colon + 1 < parameter.length())
  1199 + {
  1200 + range = parameter.substr(colon + 1);
  1201 + }
  1202 + }
  1203 + bool range_valid = false;
  1204 + try
  1205 + {
  1206 + parse_numrange(range.c_str(), 0, true);
  1207 + range_valid = true;
  1208 + }
  1209 + catch (std::runtime_error)
  1210 + {
  1211 + // ignore
  1212 + }
  1213 + if (range_valid &&
  1214 + ((angle_str == "90") || (angle_str == "180") || (angle_str == "270")))
  1215 + {
  1216 + int angle = atoi(angle_str.c_str());
  1217 + if (relative == -1)
  1218 + {
  1219 + angle = -angle;
  1220 + }
  1221 + o.rotations[range] = RotationSpec(angle, (relative != 0));
  1222 + }
  1223 + else
  1224 + {
  1225 + usage("invalid parameter to rotate: " + parameter);
  1226 + }
  1227 +}
  1228 +
1151 static void parse_options(int argc, char* argv[], Options& o) 1229 static void parse_options(int argc, char* argv[], Options& o)
1152 { 1230 {
1153 for (int i = 1; i < argc; ++i) 1231 for (int i = 1; i < argc; ++i)
@@ -1237,6 +1315,10 @@ static void parse_options(int argc, char* argv[], Options&amp; o) @@ -1237,6 +1315,10 @@ static void parse_options(int argc, char* argv[], Options&amp; o)
1237 usage("--pages: no page specifications given"); 1315 usage("--pages: no page specifications given");
1238 } 1316 }
1239 } 1317 }
  1318 + else if (strcmp(arg, "rotate") == 0)
  1319 + {
  1320 + parse_rotation_parameter(o, parameter);
  1321 + }
1240 else if (strcmp(arg, "stream-data") == 0) 1322 else if (strcmp(arg, "stream-data") == 0)
1241 { 1323 {
1242 if (parameter == 0) 1324 if (parameter == 0)
@@ -1829,6 +1911,29 @@ static void handle_page_specs(QPDF&amp; pdf, Options&amp; o, @@ -1829,6 +1911,29 @@ static void handle_page_specs(QPDF&amp; pdf, Options&amp; o,
1829 } 1911 }
1830 } 1912 }
1831 1913
  1914 +static void handle_rotations(QPDF& pdf, Options& o)
  1915 +{
  1916 + std::vector<QPDFObjectHandle> pages = pdf.getAllPages();
  1917 + int npages = static_cast<int>(pages.size());
  1918 + for (std::map<std::string, RotationSpec>::iterator iter =
  1919 + o.rotations.begin();
  1920 + iter != o.rotations.end(); ++iter)
  1921 + {
  1922 + std::string const& range = (*iter).first;
  1923 + RotationSpec const& rspec = (*iter).second;
  1924 + std::vector<int> to_rotate = parse_numrange(range.c_str(), npages);
  1925 + for (std::vector<int>::iterator i2 = to_rotate.begin();
  1926 + i2 != to_rotate.end(); ++i2)
  1927 + {
  1928 + int pageno = *i2 - 1;
  1929 + if ((pageno >= 0) && (pageno < npages))
  1930 + {
  1931 + pages.at(pageno).rotatePage(rspec.angle, rspec.relative);
  1932 + }
  1933 + }
  1934 + }
  1935 +}
  1936 +
1832 static void set_encryption_options(QPDF& pdf, Options& o, QPDFWriter& w) 1937 static void set_encryption_options(QPDF& pdf, Options& o, QPDFWriter& w)
1833 { 1938 {
1834 int R = 0; 1939 int R = 0;
@@ -2124,6 +2229,10 @@ int main(int argc, char* argv[]) @@ -2124,6 +2229,10 @@ int main(int argc, char* argv[])
2124 { 2229 {
2125 handle_page_specs(pdf, o, page_heap); 2230 handle_page_specs(pdf, o, page_heap);
2126 } 2231 }
  2232 + if (! o.rotations.empty())
  2233 + {
  2234 + handle_rotations(pdf, o);
  2235 + }
2127 2236
2128 if (o.outfilename == 0) 2237 if (o.outfilename == 0)
2129 { 2238 {
qpdf/qpdf.testcov
  View file @cfa2eb9
@@ -295,3 +295,4 @@ QPDF ignore second extra space in xref entry 0 @@ -295,3 +295,4 @@ QPDF ignore second extra space in xref entry 0
295 QPDF ignore length error xref entry 0 295 QPDF ignore length error xref entry 0
296 QPDF_encryption pad short parameter 0 296 QPDF_encryption pad short parameter 0
297 QPDFWriter ignore self-referential object stream 0 297 QPDFWriter ignore self-referential object stream 0
  298 +QPDFObjectHandle found old angle 1
qpdf/qtest/qpdf.test
  View file @cfa2eb9
@@ -780,6 +780,26 @@ foreach my $d (@sp_cases) @@ -780,6 +780,26 @@ foreach my $d (@sp_cases)
780 780
781 show_ntests(); 781 show_ntests();
782 # ---------- 782 # ----------
  783 +$td->notify("--- Rotate Pages ---");
  784 +$n_tests += 2;
  785 +# XXX do absolute, positive, and negative on ranges that include
  786 +# inherited and non-inherited.
  787 +# Pages 11-15 inherit /Rotate 90
  788 +# Pages 1 and 2 have explicit /Rotate 270
  789 +# Pages 16 and 17 have explicit /Rotate 180
  790 +
  791 +$td->runtest("page rotation",
  792 + {$td->COMMAND => "qpdf --static-id to-rotate.pdf a.pdf" .
  793 + " --rotate=+90:1,4,11,16" .
  794 + " --rotate=180:2,5,12-13" .
  795 + " --rotate=-90:3,15,17,18"},
  796 + {$td->STRING => "", $td->EXIT_STATUS => 0});
  797 +$td->runtest("check output",
  798 + {$td->FILE => "a.pdf"},
  799 + {$td->FILE => "rotated.pdf"});
  800 +
  801 +show_ntests();
  802 +# ----------
783 $td->notify("--- Numeric range parsing tests ---"); 803 $td->notify("--- Numeric range parsing tests ---");
784 my @nrange_tests = ( 804 my @nrange_tests = (
785 [",5", 805 [",5",
qpdf/qtest/qpdf/rotated.pdf 0 → 100644
View file @cfa2eb9
No preview for this file type
qpdf/qtest/qpdf/to-rotate.pdf 0 → 100644
  View file @cfa2eb9
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