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2018-08-02Rework of CPDF_Parser::GetLastObjNum.Artem Strygin
Change-Id: I0481774858a9d9823580e1207807e35be8a9eea9 Reviewed-on: https://pdfium-review.googlesource.com/36270 Reviewed-by: Lei Zhang <thestig@chromium.org> Commit-Queue: Art Snake <art-snake@yandex-team.ru>
2018-07-30Check maximum bit count of shared group object numbers.Artem Strygin
Bug: chromium:868477 Change-Id: I5957c5ef051bc4fa8eb51efa6a7fc142996742c5 Reviewed-on: https://pdfium-review.googlesource.com/39130 Commit-Queue: Art Snake <art-snake@yandex-team.ru> Reviewed-by: Henrique Nakashima <hnakashima@chromium.org>
2018-07-27Make pdfium_embeddertests pass on Windows 10.Lei Zhang
BUG=chromium:828177 NOTRY=true Change-Id: I30123087bbe11aaaa6175b5f729b7ab55107a975 Reviewed-on: https://pdfium-review.googlesource.com/38902 Commit-Queue: Lei Zhang <thestig@chromium.org> Reviewed-by: Henrique Nakashima <hnakashima@chromium.org>
2018-07-27Parse obj nums range within Hint tables for shared groups.Artem Strygin
Change-Id: Ib22db6c57d2066ef70c0ef12e44d1e5eee6611a5 Reviewed-on: https://pdfium-review.googlesource.com/36410 Commit-Queue: Art Snake <art-snake@yandex-team.ru> Reviewed-by: Lei Zhang <thestig@chromium.org>
2018-07-25Remove some ASSERT (and cast) in favor of checked cases.Tom Sepez
Because it is a stronger pattern at runtime. These were found by essentially: grep -ni '\bassert\b.*type' Change-Id: I913d77139053e8980528597a6633e1859e5204c4 Reviewed-on: https://pdfium-review.googlesource.com/38890 Reviewed-by: Lei Zhang <thestig@chromium.org> Commit-Queue: Tom Sepez <tsepez@chromium.org>
2018-07-25Change GetHeaderOffset() to return Optional<FX_FILESIZE>.Lei Zhang
Remove |kInvalidHeaderOffset|. Change-Id: I5978e745e97aa4e13299dd21028721725ac0c996 Reviewed-on: https://pdfium-review.googlesource.com/38853 Commit-Queue: Lei Zhang <thestig@chromium.org> Reviewed-by: Art Snake <art-snake@yandex-team.ru>
2018-07-25Remove CFX_MemoryStream uses in tests.Lei Zhang
Replace with CFX_BufferSeekableReadStream, which allows for spans and const inputs. Change CXFA_DocumentParser to take IFX_SeekableReadStream instead of IFX_SeekableStream in the process. Change-Id: I0168451350c9fc250231f0414c38738a4d86ca42 Reviewed-on: https://pdfium-review.googlesource.com/38852 Commit-Queue: Lei Zhang <thestig@chromium.org> Reviewed-by: Ryan Harrison <rharrison@chromium.org>
2018-07-25Use struct {Single,Range}Cmap in FPDFAPI_CIDFromCharCode().Tom Sepez
Clearer that just using indexing off of raw pointers, and makes the code more closely resemble other functions. Change-Id: I7cc8363b505e66120bc1c686bb23b2bdf8fc401f Reviewed-on: https://pdfium-review.googlesource.com/38894 Reviewed-by: Lei Zhang <thestig@chromium.org> Commit-Queue: Tom Sepez <tsepez@chromium.org>
2018-07-25Change CFX_BufferSeekableReadStream to take a span.Lei Zhang
Change-Id: Ib9e20fdfc637b2ba0358586e23ad72454b0b8ad1 Reviewed-on: https://pdfium-review.googlesource.com/38851 Commit-Queue: Lei Zhang <thestig@chromium.org> Reviewed-by: Tom Sepez <tsepez@chromium.org>
2018-07-25Move CPDF_SyntaxParser init methods into ctor.Lei Zhang
- CPDF_SyntaxParser can no longer be initialized multiple times. - Make the file length and header offset const. - Make the header offset type FX_FILESIZE consistently. - Simplify for the common case where the header offset is 0. Change-Id: I7138db1fbcec3b7578b0239b92fc1154fa4dc4ce Reviewed-on: https://pdfium-review.googlesource.com/38850 Reviewed-by: Art Snake <art-snake@yandex-team.ru> Commit-Queue: Lei Zhang <thestig@chromium.org>
2018-07-25Fix hint tables parsing.Artem Strygin
Sample PDF: https://yadi.sk/d/oWLtAEfy3YbEb3 For offsets, equal to the hint stream offset, added hint stream length to determine the actual offset, because linearization inserted the hint stream at the original location of the object. Also the number of bits needed to represent the numerator of the fractional position for each shared object reference may be zero, if each shared group contains only one object with obj num, incremented on 1. Change-Id: I4754d603f388354821e8d0cac97ad99a7578fe4b Reviewed-on: https://pdfium-review.googlesource.com/36610 Commit-Queue: Art Snake <art-snake@yandex-team.ru> Reviewed-by: Lei Zhang <thestig@chromium.org>
2018-07-25Use document size instead of file size while parsing.Artem Strygin
We should use document size instead of File size, because all offsets and sizes was read from document should take into account of header offset. Added some tests of parsing of documents with header offset. Also drop friendship of CPDF_SyntaxParser with CPDF_Parser. Change-Id: Iebec75ab2ee07fb644a6c653b4ef5c2e09af09fe Reviewed-on: https://pdfium-review.googlesource.com/35830 Commit-Queue: Art Snake <art-snake@yandex-team.ru> Reviewed-by: Lei Zhang <thestig@chromium.org>
2018-07-24Fix encryption dictionary owning.Artem Strygin
Return encryption dictionary as const reference from CPDF_Parser. Create a copy in CPDF_Creator if needed. Change-Id: I270f71d307d818fba7f65ebe379f5942ae816934 Reviewed-on: https://pdfium-review.googlesource.com/38390 Reviewed-by: Lei Zhang <thestig@chromium.org> Commit-Queue: Art Snake <art-snake@yandex-team.ru>
2018-07-23Rework of CPDF_Object writing.Artem Strygin
Move writing logic into implementation of related clases. Change-Id: If70dc418b352b562ee681ea34fa6595d6f52eee3 Reviewed-on: https://pdfium-review.googlesource.com/36350 Commit-Queue: Art Snake <art-snake@yandex-team.ru> Reviewed-by: Tom Sepez <tsepez@chromium.org>
2018-07-23Add support of rebuilding crossrefs with compressed objects.Artem Strygin
Change-Id: I0743c34f0206f85828570430edb9f62b6b0cdbb5 Reviewed-on: https://pdfium-review.googlesource.com/37315 Reviewed-by: Lei Zhang <thestig@chromium.org> Commit-Queue: Art Snake <art-snake@yandex-team.ru>
2018-07-20Rework of CPDF_Parser::RebuildCrossRef.chromium/3498Artem Strygin
Use CPDF_SyntaxParser logic to rebuild crossref. Change-Id: I394f64e76294b97c6a7c2b8984a880712fd193a7 Reviewed-on: https://pdfium-review.googlesource.com/37314 Reviewed-by: Lei Zhang <thestig@chromium.org> Commit-Queue: Art Snake <art-snake@yandex-team.ru>
2018-07-18Add pdfium::span::as_bytes() and as_writable_bytes().Tom Sepez
Picks up some enhancements from base/span.h. In turn, also adds the size_bytes() helper. Differs from base version in that it works around C++14 enable_if_t<>, and avoids the dynamic_extent template specialization tricks. Use it in a few places where appropriate. Change-Id: I86f72cf0023f2d4317a7afa351fddee601c8f86c Reviewed-on: https://pdfium-review.googlesource.com/38251 Reviewed-by: Daniel Cheng <dcheng@chromium.org> Commit-Queue: Tom Sepez <tsepez@chromium.org>
2018-07-18Use casts to deduplicate implementation of const/non-const methods.Henrique Nakashima
Change-Id: Ia5a4e89bff8a1dbc46246f5a734170765b7ee74e Reviewed-on: https://pdfium-review.googlesource.com/38250 Reviewed-by: Lei Zhang <thestig@chromium.org> Commit-Queue: Henrique Nakashima <hnakashima@chromium.org>
2018-07-18Do not add invalid objects to the cross reference table.chromium/3496Lei Zhang
BUG=chromium:851994 Change-Id: I2e14401271c70afa204221e0f3d469f0b82ce8cf Reviewed-on: https://pdfium-review.googlesource.com/37871 Commit-Queue: Lei Zhang <thestig@chromium.org> Reviewed-by: Art Snake <art-snake@yandex-team.ru>
2018-07-18Avoid writing const/non-const versions of the same function.Lei Zhang
Use const_cast for the non-const version to call the const version. Change-Id: Ibdf5fe53255ee6e983555080336f5d63e683afd1 Reviewed-on: https://pdfium-review.googlesource.com/37490 Reviewed-by: Henrique Nakashima <hnakashima@chromium.org> Commit-Queue: Lei Zhang <thestig@chromium.org>
2018-07-18Use CPDF_CrossRefTable within CPDF_ParserArtem Strygin
Change-Id: I354e8bed12606abdc67427bbc7928e3b1f11e243 Reviewed-on: https://pdfium-review.googlesource.com/35433 Commit-Queue: Art Snake <art-snake@yandex-team.ru> Reviewed-by: Lei Zhang <thestig@chromium.org>
2018-07-18Make CPDF_Parser::GetTrailer const method.Artem Strygin
Use own copy of encryption dictionary within CPDF_Parser, to prevent modification of original trailer. Change-Id: I6246b872d431b94411fcec694c5176f8d85dfe26 Reviewed-on: https://pdfium-review.googlesource.com/35450 Commit-Queue: Art Snake <art-snake@yandex-team.ru> Reviewed-by: Lei Zhang <thestig@chromium.org>
2018-07-18Improve image size validation in CPDF_ScaledRenderBuffer.Lei Zhang
In CPDF_ScaledRenderBuffer::Initialize(), use the existing CFX_DIBitmap::CalculatePitchAndSize() function to figure out the pitch and size. Unlike the existing code, CalculatePitchAndSize() does a better job of checking for integer overflows. BUG=pdfium:1123 Change-Id: Ic8fe7226bc56fed0456486d88e02a7af2928bc94 Reviewed-on: https://pdfium-review.googlesource.com/38010 Commit-Queue: Lei Zhang <thestig@chromium.org> Reviewed-by: Tom Sepez <tsepez@chromium.org>
2018-07-18Simplify CPDF_Creator::InitID().Lei Zhang
Remove checks for impossible conditions. Change-Id: I7a6607675899bfde6179e93da0c9139dfec19984 Reviewed-on: https://pdfium-review.googlesource.com/38070 Reviewed-by: Art Snake <art-snake@yandex-team.ru> Reviewed-by: Henrique Nakashima <hnakashima@chromium.org> Commit-Queue: Lei Zhang <thestig@chromium.org>
2018-07-16Fix some nits in CPDF_Document.Lei Zhang
Change-Id: I57f89b9f2a8ef3f351e7574a76d6064ffde150d3 Reviewed-on: https://pdfium-review.googlesource.com/37870 Reviewed-by: Henrique Nakashima <hnakashima@chromium.org> Commit-Queue: Lei Zhang <thestig@chromium.org>
2018-07-16Remove unused member from CPDF_DataAvail.Tom Sepez
Change-Id: I3686bd3d28a84aae39c750a371902e1e5d62b365 Reviewed-on: https://pdfium-review.googlesource.com/37050 Reviewed-by: dsinclair <dsinclair@chromium.org> Commit-Queue: Tom Sepez <tsepez@chromium.org>
2018-07-16Get rid of some loose allocs/free in CPDF_Document.chromium/3494Tom Sepez
Use std::vector<> as a manager for contiguous buffers. Change-Id: Icaacbd4b7010b928237aa71485411ade7539412a Reviewed-on: https://pdfium-review.googlesource.com/37012 Reviewed-by: dsinclair <dsinclair@chromium.org> Commit-Queue: Tom Sepez <tsepez@chromium.org>
2018-07-14Use more ternary operators in content mark code.chromium/3493chromium/3492Lei Zhang
Change-Id: Ibf09905523ae2d80ce48bfe7337733d8dc718669 Reviewed-on: https://pdfium-review.googlesource.com/37850 Commit-Queue: Henrique Nakashima <hnakashima@chromium.org> Reviewed-by: Henrique Nakashima <hnakashima@chromium.org>
2018-07-13Create API to remove a content mark from a page object.Henrique Nakashima
- FPDFPageObj_RemoveMark() Bug: pdfium:1037 Change-Id: I7ff320261d64e3ead45375ccc72301e7c64dd6e3 Reviewed-on: https://pdfium-review.googlesource.com/37710 Reviewed-by: Lei Zhang <thestig@chromium.org> Commit-Queue: Henrique Nakashima <hnakashima@chromium.org>
2018-07-13Fix mark parameters not saved if nothing changed.Henrique Nakashima
Bug: pdfium:1037 Change-Id: Ia2cd0d6ef99495dda3289988123489e3a2ad6e82 Reviewed-on: https://pdfium-review.googlesource.com/37750 Reviewed-by: Lei Zhang <thestig@chromium.org> Commit-Queue: Henrique Nakashima <hnakashima@chromium.org>
2018-07-12Rename 'ori' to 'backdrop' in rendering code.Lei Zhang
Change-Id: I6fa3fd93638bc3aeaaef854676fe31476888433b Reviewed-on: https://pdfium-review.googlesource.com/37671 Reviewed-by: Henrique Nakashima <hnakashima@chromium.org> Commit-Queue: Lei Zhang <thestig@chromium.org>
2018-07-12Remove CPDF_HintTables::GetItemLength()Artem Strygin
Commit {Insert later} removed the last caller to this method. Change-Id: I1689b33486396cc3a41139f984f819b39ab02b2a Reviewed-on: https://pdfium-review.googlesource.com/35130 Commit-Queue: Art Snake <art-snake@yandex-team.ru> Reviewed-by: dsinclair <dsinclair@chromium.org>
2018-07-12Implement CPDF_HintsTable::SharedObjGroupInfo.Artem Strygin
Merge shared objects related data into CPDF_HintsTable::SharedObjGroupInfo. Change-Id: I53bb7fc42ea6bcd26b3ebf91b8c6aa402108d086 Reviewed-on: https://pdfium-review.googlesource.com/15830 Reviewed-by: Lei Zhang <thestig@chromium.org> Commit-Queue: Art Snake <art-snake@yandex-team.ru>
2018-07-12Reland "Avoid duplicate data buffering in CPDF_SyntaxParser::ReadStream()."Artem Strygin
This is a reland of 77f15f7883638a4ced131d74c053af10a5970ce9 Original change's description: > Avoid duplicate data buffering in CPDF_SyntaxParser::ReadStream(). > > Allow sub-streams created from an IFX_SeekableReadStream to provide > stream data without copying memory. > The data will only reside in the top-level stream. > > For example: > For file > http://www.major-landrover.ru/upload/attachments/f/9/f96aab07dab04ae89c8a509ec1ef2b31.pdf > (18 Mb) > > The memory usage is reduced by ~13 Mb. > > Change-Id: I2595c014d0fbe1fdd181cc04965cfd7d901c2d88 > Reviewed-on: https://pdfium-review.googlesource.com/35930 > Commit-Queue: Art Snake <art-snake@yandex-team.ru> > Reviewed-by: dsinclair <dsinclair@chromium.org> Change-Id: I4c4d5dcf42ff44784468ac7a7c302df509fc804d Reviewed-on: https://pdfium-review.googlesource.com/37313 Reviewed-by: Henrique Nakashima <hnakashima@chromium.org> Commit-Queue: Art Snake <art-snake@yandex-team.ru>
2018-07-11Write marked content operators when generating a stream.Henrique Nakashima
The marked content operators are BMC, BDC and EMC. In the case of BDC, it is preceded by a direct dict or a property name. Bug: pdfium:1118 Change-Id: I3ee736ff7be3e7d7dde55ef581af3444a325e887 Reviewed-on: https://pdfium-review.googlesource.com/37470 Reviewed-by: Lei Zhang <thestig@chromium.org> Commit-Queue: Henrique Nakashima <hnakashima@chromium.org>
2018-07-11Store property name for marked content with an indirect dict.Henrique Nakashima
The name of the property is now stored in the CPDF_ContentMarkItem, which will be needed to properly write back these content marks after a change in the stream. Bug: pdfium:1118 Change-Id: I1296f488b35ee0684efa33d17400ed22a88383a2 Reviewed-on: https://pdfium-review.googlesource.com/37370 Commit-Queue: Henrique Nakashima <hnakashima@chromium.org> Reviewed-by: Lei Zhang <thestig@chromium.org>
2018-07-11Cleanup CPDF_ContentMark.Henrique Nakashima
Bug: pdfium:1118 Change-Id: I457a52196ee177a09d33d9e025a094888be3fb60 Reviewed-on: https://pdfium-review.googlesource.com/37610 Commit-Queue: Henrique Nakashima <hnakashima@chromium.org> Reviewed-by: Lei Zhang <thestig@chromium.org>
2018-07-11Split CPDF_ContentMark::AddMark() into three versions.Henrique Nakashima
One version is for a mark without a dictionary. The second is for a mark with a direct dictionary. The third is for a mark with indirect properties. Bug: pdfium:1118 Change-Id: Ice0ff11d5ba4eaf2ccdf57be49b9140ba5c9b159 Reviewed-on: https://pdfium-review.googlesource.com/37550 Reviewed-by: Lei Zhang <thestig@chromium.org> Commit-Queue: Henrique Nakashima <hnakashima@chromium.org>
2018-07-11Fix crash and memory leak.Artem Strygin
Do not return size within CPDF_StreamAcc in case when read data failed. Also free buffers in this case. Bug: chromium:860210 Change-Id: Ifb2a061d7c8427409b68c33f213c5c55343fb946 Reviewed-on: https://pdfium-review.googlesource.com/37310 Reviewed-by: Henrique Nakashima <hnakashima@chromium.org> Commit-Queue: Art Snake <art-snake@yandex-team.ru>
2018-07-11Do not store cross ref v5 obj within document.Artem Strygin
Currently, not necessary to store the cross ref v5 obj within CPDF_IndirectObjectHolder(CPDF_Document), because all necessary data from the cross ref are parsed or cloned, and owned by CPDF_Parser seperately from CPDF_IndirectObjectHolder. Also this fix regression from commit 4ea4459e. BUG=chromium:810768 Change-Id: I0d1a11ff027210f4f15804a69d12416838ec9815 Reviewed-on: https://pdfium-review.googlesource.com/37110 Reviewed-by: Lei Zhang <thestig@chromium.org> Commit-Queue: Art Snake <art-snake@yandex-team.ru>
2018-07-10Create API for adding content marks and setting their params.chromium/3488Henrique Nakashima
This CL creates the following new functions in the public API: - FPDFPageObj_AddMark - FPDFPageObjMark_SetIntParam - FPDFPageObjMark_SetStringParam Bug: pdfium:1037 Change-Id: Icabf3fdd8e8153b9156bab807a3708d38a9365d8 Reviewed-on: https://pdfium-review.googlesource.com/37330 Commit-Queue: Henrique Nakashima <hnakashima@chromium.org> Reviewed-by: Lei Zhang <thestig@chromium.org>
2018-07-10Make CPDF_StreamContentParser::m_pResources a const pointer.Lei Zhang
Move the code to select what it points at to a separate function, so the CPDF_StreamContentParser constructor only sets it once. Change-Id: I60013e77c8f37246282f94227a4aeb17270ee23c Reviewed-on: https://pdfium-review.googlesource.com/37450 Reviewed-by: Henrique Nakashima <hnakashima@chromium.org> Commit-Queue: Lei Zhang <thestig@chromium.org>
2018-07-10Fix m_ExtGID usage in CPDF_CharPosListNicolás Peña
This CL allows Apple to use m_GlyphIndex as a replacement for m_ExtGID when it is invalid. Bug: pdfium:1121 Change-Id: I49e7936201815bae5a2c8a26680fc1e542a60c43 Reviewed-on: https://pdfium-review.googlesource.com/37390 Reviewed-by: Henrique Nakashima <hnakashima@chromium.org> Commit-Queue: Nicolás Peña Moreno <npm@chromium.org>
2018-07-06Maintain a stack of CPDF_ContentMark while parsing a stream.Henrique Nakashima
This avoids copying the CPDF_ContentMark every time a mark is closed. Another benefit is that the same CPDF_ContentMarkItem vector will be shared by page objects before and after a nested mark. Bug: pdfium:1037 Change-Id: I6197f0b9a4693ef84da9269f86a2629aa50d8685 Reviewed-on: https://pdfium-review.googlesource.com/37190 Commit-Queue: Henrique Nakashima <hnakashima@chromium.org> Reviewed-by: Ryan Harrison <rharrison@chromium.org>
2018-07-06Make MarkData::mMarks a vector of RetainPtr<CPDF_ContentMarkItem>Henrique Nakashima
It is currently a vector of CPDF_ContentMarkItem. Copying MarkData whenever a content mark is opened or closed is inefficient since each MarkData will have copies of the same CPDF_ContentMarkItems. This CL changes the vector inside MarkData to contains only pointers to the CPDF_ContentMarkItems rather than copies of those items. More importantly, this unifies the dictionaries of each content mark. Previously, there were as many copies of those dictionaries as content marks scope changes inside the mark with parameters. Bug: pdfium:1037 Change-Id: Ia6f79b401d4e14ac07dbba81bbd97df965b77c94 Reviewed-on: https://pdfium-review.googlesource.com/37135 Commit-Queue: Henrique Nakashima <hnakashima@chromium.org> Reviewed-by: Ryan Harrison <rharrison@chromium.org>
2018-07-06Revert "Avoid duplicate data buffering in CPDF_SyntaxParser::ReadStream()."Henrique Nakashima
This reverts commit 77f15f7883638a4ced131d74c053af10a5970ce9. Reason for revert: Causes crbug.com/860210 Bug: chromium:860210 Original change's description: > Avoid duplicate data buffering in CPDF_SyntaxParser::ReadStream(). > > Allow sub-streams created from an IFX_SeekableReadStream to provide > stream data without copying memory. > The data will only reside in the top-level stream. > > For example: > For file > http://www.major-landrover.ru/upload/attachments/f/9/f96aab07dab04ae89c8a509ec1ef2b31.pdf > (18 Mb) > > The memory usage is reduced by ~13 Mb. > > Change-Id: I2595c014d0fbe1fdd181cc04965cfd7d901c2d88 > Reviewed-on: https://pdfium-review.googlesource.com/35930 > Commit-Queue: Art Snake <art-snake@yandex-team.ru> > Reviewed-by: dsinclair <dsinclair@chromium.org> TBR=tsepez@chromium.org,dsinclair@chromium.org,art-snake@yandex-team.ru # Not skipping CQ checks because original CL landed > 1 day ago. Change-Id: I947fca17052765935a952a4f25ca48f6599c4af9 Reviewed-on: https://pdfium-review.googlesource.com/37210 Reviewed-by: Henrique Nakashima <hnakashima@chromium.org> Commit-Queue: Henrique Nakashima <hnakashima@chromium.org>
2018-07-05Fix integer overflow in CPDF_Type3Cachechromium/3483Nicolas Pena
Bug: chromium:845800 Change-Id: Ib878dd991e435a76b63b662ef3d9d33c2cc61a19 Reviewed-on: https://pdfium-review.googlesource.com/37191 Commit-Queue: Ryan Harrison <rharrison@chromium.org> Reviewed-by: Ryan Harrison <rharrison@chromium.org>
2018-07-05Rename CPDF_ContentMark::m_Ref to ::m_pMarkData.Henrique Nakashima
Bug: pdfium:1037 Change-Id: I94efc14ce5f8d0d407853cce025f0184b3866cc4 Reviewed-on: https://pdfium-review.googlesource.com/37134 Commit-Queue: Henrique Nakashima <hnakashima@chromium.org> Reviewed-by: Ryan Harrison <rharrison@chromium.org>
2018-07-05Delete CPDF_ContentMark::HasRef()Henrique Nakashima
This is called by many client to make sure CountItems() does not crash. Moving the check to CountItems() makes HasRef() unnecessary. Bug: pdfium:1037 Change-Id: I4f21f33a88c9aad54f0dae18a38b370c6ceaec80 Reviewed-on: https://pdfium-review.googlesource.com/37133 Commit-Queue: Henrique Nakashima <hnakashima@chromium.org> Reviewed-by: Ryan Harrison <rharrison@chromium.org>
2018-07-05Replace SharedCopyOnWrite<MarkData> with RetainPtrHenrique Nakashima
A RetainPtr is already used inside SharedCopyOnWrite, and the API that CPDF_ContentMark offers is not intuitive. AddMark() and RemoveLastMark() currently copy the MarkData. The new API does not perform these copies, but rather leaves it to the client code. This is the first step to make CPDF_ContentMarkItems modifiable. As long as they are inside a SharedCopyOnWrite, they cannot be changed. Bug: pdfium:1037 Change-Id: I0cd6334b0b8db62070b4412f1d6d1c88bce9891f Reviewed-on: https://pdfium-review.googlesource.com/37132 Reviewed-by: Ryan Harrison <rharrison@chromium.org> Commit-Queue: Henrique Nakashima <hnakashima@chromium.org>
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