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* Fix many return-std-move-in-c++11 warningsGravatar Kevin Lubick2018-04-16
| | | | | | | | | Change-Id: Ib0042cf412fe3c5fa600b7ae644d16740457535e Reviewed-on: https://skia-review.googlesource.com/121354 Commit-Queue: Kevin Lubick <kjlubick@google.com> Commit-Queue: Mike Klein <mtklein@google.com> Auto-Submit: Kevin Lubick <kjlubick@google.com> Reviewed-by: Mike Klein <mtklein@google.com>
* SkPDF: PDFStream has-a not is-a PDFDictGravatar halcanary2016-07-29
| | | | | | | | | | | | | | | Motivation: SkPDFStream and SkPDFSharedStream now work the same. Also: - move SkPDFStream into SkPDFTypes (it's a fundamental PDF type). - minor refactor of SkPDFSharedStream - SkPDFSharedStream takes unique_ptr to represent ownership BUG=skia: GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2190883003 Review-Url: https://codereview.chromium.org/2190883003
* SkPDF: flip saveLayer rightside upGravatar halcanary2016-07-29
| | | | | | | | | | Broken in https://skia.googlesource.com/skia/+/4b1e17e BUG=632574 TBR=tomhudson@google.com GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2197623002 Review-Url: https://codereview.chromium.org/2197623002
* SkPdf: SkPDFFormXObject de-class-ified.Gravatar halcanary2016-07-27
| | | | | | | | | | | | | | We don't need an object, just a few standard fields on the base class; the change lets us get rid of a bunch of boilerplate code. I think this also reduces the cognitive load of the SkPDF internals. BUG=skia: GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2185803003 Review-Url: https://codereview.chromium.org/2185803003
* SkPDF: SkPDFStream takes a unique_ptrGravatar halcanary2016-07-27
| | | | | | | BUG=skia: GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2188623004 Review-Url: https://codereview.chromium.org/2188623004
* SkPDF: SkPDFStream takes only SkStreamAssetGravatar halcanary2016-06-29
| | | | | | | | | This is possible since https://crrev.com/869763002. Later, I'll clean up the logic and class constructors. For now, I assert everywhere I expect a SkStreamAsset to be well-behaved (duplcate, hasLength). GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2098393002 Review-Url: https://codereview.chromium.org/2098393002
* Style bikeshed - remove extraneous whitespaceGravatar halcanary2016-03-29
| | | | | | GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1842753002 Review URL: https://codereview.chromium.org/1842753002
* SkPDF: use sk_ref_spGravatar halcanary2016-03-09
| | | | | | | | s/sk_sp<[^>]*>(SkRef(\([^)]*\)))/sk_ref_sp(\1)/ GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1777923002 Review URL: https://codereview.chromium.org/1777923002
* SkPDF: Add sk_sp setters; .release() becomes std::move()Gravatar halcanary2016-03-08
| | | | | | | | | | | | | | | | Note to reviewers: Start with changes to SkPDFTypes.h Many places that had a bare pointer owning a reference are refactored to use a sk_sp. There remain several places where a non-owning pointer `T*` should be replaced with `const sk_sp<T>&` to eliminate the common pattern `sk_sp<T>(SkRef(x))`. Committed: https://skia.googlesource.com/skia/+/9904c9212074279380e21f96575078734dbbd308 GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1775043002 Review URL: https://codereview.chromium.org/1775043002
* Revert of SkPDF: Add sk_sp setters; .release() becomes std::move() (patchset ↵Gravatar halcanary2016-03-08
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | #2 id:20001 of https://codereview.chromium.org/1775043002/ ) Reason for revert: https://build.chromium.org/p/client.skia/builders/Linux%20Builder/builds/6405/steps/compile/logs/stdio Original issue's description: > SkPDF: Add sk_sp setters; .release() becomes std::move() > > Note to reviewers: Start with changes to SkPDFTypes.h > > Many places that had a bare pointer owning a reference are refactored to > use a sk_sp. > > There remain several places where a non-owning pointer `T*` should be > replaced with `const sk_sp<T>&` to eliminate the common pattern > `sk_sp<T>(SkRef(x))`. > > Committed: https://skia.googlesource.com/skia/+/9904c9212074279380e21f96575078734dbbd308 TBR=bungeman@google.com # Skipping CQ checks because original CL landed less than 1 days ago. NOPRESUBMIT=true NOTREECHECKS=true NOTRY=true Review URL: https://codereview.chromium.org/1775143002
* SkPDF: Add sk_sp setters; .release() becomes std::move()Gravatar halcanary2016-03-08
| | | | | | | | | | | | | Note to reviewers: Start with changes to SkPDFTypes.h Many places that had a bare pointer owning a reference are refactored to use a sk_sp. There remain several places where a non-owning pointer `T*` should be replaced with `const sk_sp<T>&` to eliminate the common pattern `sk_sp<T>(SkRef(x))`. Review URL: https://codereview.chromium.org/1775043002
* SkPDF: use sk_make_sp<T> when it makes sense.Gravatar halcanary2016-03-08
| | | | | | GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1773033002 Review URL: https://codereview.chromium.org/1773033002
* SkPDF: s/SkAutoTUnref/sk_sp/gGravatar halcanary2016-03-07
| | | | Review URL: https://codereview.chromium.org/1771073002
* SkPDF: AutoTUnref<T> changes in useGravatar halcanary2016-03-06
| | | | | | | | | | ::detach() -> ::release() ::operator T*() -> ::get() This makes all use of AutoTUnref work the same as sk_sp. GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1772493002 Review URL: https://codereview.chromium.org/1772493002
* Style Change: NULL->nullptrGravatar halcanary2015-08-27
| | | | | | DOCS_PREVIEW= https://skia.org/?cl=1316233002 Review URL: https://codereview.chromium.org/1316233002
* SkPDF: clean up uses of deprecated calls in other SkPDF classesGravatar halcanary2015-04-27
| | | | | | BUG=skia:3585 Review URL: https://codereview.chromium.org/1107923002
* SkPDF: ResourceDict replaced by factory functionGravatar halcanary2015-04-09
| | | | | | | | | Motivation: Having a class here was unnecessary, since the only thing that set this class apart was how it is created, not how it behaves. BUG=skia:3585 Review URL: https://codereview.chromium.org/1068343003
* SkPDF: Factor SkPDFCatalog into SkPDFObjNumMap and SkPDFSubstituteMapGravatar halcanary2015-03-31
| | | | | | | | | | | | | | | | | | | | | | | | | | | Motivation: Keep separate features separate. Also, future linearization work will need to have several objNumMap objects share a substituteMap. Also "catalog" has a specific meaning in PDF. This catalog did not map to that catalog. - Modify SkPDFObject::emitObject and SkPDFObject::addResources interface to requiore SkPDFObjNumMap and SkPDFSubstituteMap. - SkPDFObjNumMap const in SkPDFObject::emitObject. - Remove SkPDFCatalog.cpp/.h - Modify SkDocument_PDF.cpp to use new functions - Fold in SkPDFStream::populate - Fold in SkPDFBitmap::emitDict - Move SkPDFObjNumMap and SkPDFSubstituteMap to SkPDFTypes.h - Note (via assert) that SkPDFArray & SkPDFDict don't need to check substitutes. - Remove extra space from SkPDFDict serialization. - SkPDFBitmap SkPDFType0Font SkPDFGraphicState SkPDFStream updated to new interface. - PDFPrimitivesTest updated for new interface. BUG=skia:3585 Review URL: https://codereview.chromium.org/1049753002
* SkPDF: skpdfdocument and skpdfpage use skpdfdevice in a const wayGravatar halcanary2015-03-25
| | | | | | BUG=skia:3585 Review URL: https://codereview.chromium.org/1035513003
* SkPDF: replace SkPDFDevice::copyContentToDataGravatar halcanary2015-02-24
| | | | | | | | | Motivation: remove copyToData(). Later we will stop caching the data alltogether. BUG=skia: Review URL: https://codereview.chromium.org/958433003
* Simplify reference management in SkPDFGravatar halcanary2015-02-10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Prior to this change, SkPDFObject subclasses were required to track their resources separately from the document structure. (An object has a resource if it depends, via an indirect reference, on another object). This led to a lot of extra code to duplicate effort. I replace the getResources() function with the much simpler addResources() function. I only define a non-trivial addResources() method on arrays, dictionaries, and indirect object references. All other specialized classes simply rely on their parent class's implementation. SkPDFObject::addResources() works by recursively walking the directed graph of object (direct and indirect) references and adding resources to a set. It doesn't matter that there are closed loops in the graph, since we check the set before walking down a branch. - Add SkPDFObject::addResources() virtual function, with four implementations - Remove SkPDFObject::getResources() virtual function and all implementations. - Remove SkPDFObject::GetResourcesHelper() - Remove SkPDFObject::AddResourceHelper() - In SkPDFCatalog::findObjectIndex(), add an object to the catalog if it doesn't exist yet. - SkPDFCatalog::setSubstitute() no longer sets up resources - SkPDFDocument.cpp no longer needs the Streamer object - SkPDFDocument.cpp calls fDocCatalog->addResources to build the resource list. - SkPDFFont::addResource() removed - All SkPDF-::fResource sets removed (they are redundant). - removed SkPDFImage::addSMask() function - SkPDFResourceDict::getReferencedResources() removed. Motivation: this removes quite a bit of code and makes the objects slightly slimmer in memory. Most importantly, this will lead the way towards removing SkPDFObject's inheritance from SkRefCnt, which will greatly simplify everything. Testing: I usually test changes to the PDF backend by comparing checksums of PDF files rendered from GMs and SKPs before and after the change. This change both re-orders and re-numbers the indirect PDF objects. I used the qpdf program to normalize the PDFs and then compared the normalized outputs from before and after the change; they matched. Review URL: https://codereview.chromium.org/870333002
* Make SkStream *not* ref counted.Gravatar scroggo2015-01-21
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | SkStream is a stateful object, so it does not make sense for it to have multiple owners. Make SkStream inherit directly from SkNoncopyable. Update methods which previously called SkStream::ref() (e.g. SkImageDecoder::buildTileIndex() and SkFrontBufferedStream::Create(), which required the existing owners to call SkStream::unref()) to take ownership of their SkStream parameters and delete when done (including on failure). Switch all SkAutoTUnref<SkStream>s to SkAutoTDelete<SkStream>s. In some cases this means heap allocating streams that were previously stack allocated. Respect ownership rules of SkTypeface::CreateFromStream() and SkImageDecoder::buildTileIndex(). Update the comments for exceptional methods which do not affect the ownership of their SkStream parameters (e.g. SkPicture::CreateFromStream() and SkTypeface::Deserialize()) to be explicit about ownership. Remove test_stream_life, which tested that buildTileIndex() behaved correctly when SkStream was a ref counted object. The test does not make sense now that it is not. In SkPDFStream, remove the SkMemoryStream member. Instead of using it, create a new SkMemoryStream to pass to fDataStream (which is now an SkAutoTDelete). Make other pdf rasterizers behave like SkPDFDocumentToBitmap. SkPDFDocumentToBitmap delete the SkStream, so do the same in the following pdf rasterizers: SkPopplerRasterizePDF SkNativeRasterizePDF SkNoRasterizePDF Requires a change to Android, which currently treats SkStreams as ref counted objects. Review URL: https://codereview.chromium.org/849103004
* Implemented transparent gradientsGravatar commit-bot@chromium.org2013-07-23
| | | | | | | | | | R=vandebo@chromium.org, edisonn@google.com Author: richardlin@chromium.org Review URL: https://chromiumcodereview.appspot.com/18585002 git-svn-id: http://skia.googlecode.com/svn/trunk@10297 2bbb7eff-a529-9590-31e7-b0007b416f81
* Fix Clang build on SkPDFResourceDict (CL 18977002)Gravatar commit-bot@chromium.org2013-07-23
| | | | | | | | | | R=edisonn@google.com, vandebo@chromium.org Author: richardlin@chromium.org Review URL: https://chromiumcodereview.appspot.com/19954011 git-svn-id: http://skia.googlecode.com/svn/trunk@10295 2bbb7eff-a529-9590-31e7-b0007b416f81
* Revert "Adds SkPDFResourceDict class, refactor existing code to use it."Gravatar vandebo@chromium.org2013-07-22
| | | | | | | | This reverts commit r10245 Review URL: https://codereview.chromium.org/19523007 git-svn-id: http://skia.googlecode.com/svn/trunk@10247 2bbb7eff-a529-9590-31e7-b0007b416f81
* Adds SkPDFResourceDict class, refactor existing code to use it.Gravatar commit-bot@chromium.org2013-07-22
| | | | | | | | | | | | Committed: http://code.google.com/p/skia/source/detail?r=10202 R=vandebo@chromium.org, edisonn@google.com Author: richardlin@chromium.org Review URL: https://chromiumcodereview.appspot.com/18977002 git-svn-id: http://skia.googlecode.com/svn/trunk@10245 2bbb7eff-a529-9590-31e7-b0007b416f81
* Revert "Adds SkPDFResourceDict class to manage resource dicts. Refactors ↵Gravatar vandebo@chromium.org2013-07-19
| | | | | | | | | | existing code to use this class." This reverts commit r10202 Review URL: https://codereview.chromium.org/19790007 git-svn-id: http://skia.googlecode.com/svn/trunk@10205 2bbb7eff-a529-9590-31e7-b0007b416f81
* Adds SkPDFResourceDict class to manage resource dicts. Refactors existing ↵Gravatar commit-bot@chromium.org2013-07-19
| | | | | | | | | | | | | code to use this class. BUG= R=vandebo@chromium.org, edisonn@google.com Author: richardlin@chromium.org Review URL: https://chromiumcodereview.appspot.com/18977002 git-svn-id: http://skia.googlecode.com/svn/trunk@10202 2bbb7eff-a529-9590-31e7-b0007b416f81
* resubmit https://code.google.com/p/skia/source/detail?r=7883 (in the meantime weGravatar edisonn@google.com2013-04-02
| | | | | | | added capability to collect minidump and callstack if buildbot fails with heap coruption in windows, and a NPE bug was fixed in SkPDFDocument, when document was destroyed without ever beeing used and a field was NULL + a few minor conflicts have been resolved) git-svn-id: http://skia.googlecode.com/svn/trunk@8487 2bbb7eff-a529-9590-31e7-b0007b416f81
* Reverting r8233 (Use SkSet in PDF)Gravatar robertphillips@google.com2013-03-20
| | | | git-svn-id: http://skia.googlecode.com/svn/trunk@8255 2bbb7eff-a529-9590-31e7-b0007b416f81
* resubmit https://code.google.com/p/skia/source/detail?r=7883 (in the ↵Gravatar edisonn@google.com2013-03-19
| | | | | | | | meantime we added capability to collect minidump and callstack if buildbot fails with heap coruption in windows. a few minor conflicts have been resolved) Review URL: https://codereview.chromium.org/12840004 git-svn-id: http://skia.googlecode.com/svn/trunk@8233 2bbb7eff-a529-9590-31e7-b0007b416f81
* Work around stack overflowGravatar vandebo@chromium.org2013-03-14
| | | | | | Review URL: https://codereview.appspot.com/7561043 git-svn-id: http://skia.googlecode.com/svn/trunk@8162 2bbb7eff-a529-9590-31e7-b0007b416f81
* revert r7892Gravatar edisonn@google.com2013-02-28
| | | | git-svn-id: http://skia.googlecode.com/svn/trunk@7896 2bbb7eff-a529-9590-31e7-b0007b416f81
* resubmit after fixing assert issue: https://codereview.appspot.com/6744050Gravatar edisonn@google.com2013-02-27
| | | | git-svn-id: http://skia.googlecode.com/svn/trunk@7892 2bbb7eff-a529-9590-31e7-b0007b416f81
* Revert r7883Gravatar edisonn@google.com2013-02-27
| | | | git-svn-id: http://skia.googlecode.com/svn/trunk@7884 2bbb7eff-a529-9590-31e7-b0007b416f81
* Use SkSet to fix issue when pdf generates an exp number of resources.Gravatar edisonn@google.com2013-02-27
| | | | | | | | | | | | | | | The problem fixed - http://code.google.com/p/skia/issues/detail?id=940 - is that getResources will recursively obtain all child resource recursively without checking for duplicates. If we have lots of duplicates, then we try to build a very large vector (exponential with the number of nodes usually) and sooner or later we end up using too much memory and crash. A possible solution could have been to make sure resources do not have duplicates, but that requirement is impractical, and it this leaves the solution fragile, if there is any issue in the tree, we crash. When we emit the pdf, the large number of duplicates is not an issue, because SkPDFCatalog::addObject will deal with duplicates. I have run the gm with --config pdf, and the images are 100% same bits, while the pdfs have the same size but some very small changes, the order of some objects. Review URL: https://codereview.appspot.com/6744050 git-svn-id: http://skia.googlecode.com/svn/trunk@7883 2bbb7eff-a529-9590-31e7-b0007b416f81
* Remove SkRefPtrGravatar vandebo@chromium.org2013-01-04
| | | | | | | | | (resubmit of https://codereview.appspot.com/7030059/) TBR=junov@google.com Review URL: https://codereview.appspot.com/7030065 git-svn-id: http://skia.googlecode.com/svn/trunk@7030 2bbb7eff-a529-9590-31e7-b0007b416f81
* Revert "Remove SkRefPtr" - r7021Gravatar vandebo@chromium.org2013-01-04
| | | | | | | | samplecode/ still needs to be updated. Review URL: https://codereview.appspot.com/7032048 git-svn-id: http://skia.googlecode.com/svn/trunk@7022 2bbb7eff-a529-9590-31e7-b0007b416f81
* Remove SkRefPtrGravatar vandebo@chromium.org2013-01-04
| | | | | | Review URL: https://codereview.appspot.com/7030059 git-svn-id: http://skia.googlecode.com/svn/trunk@7021 2bbb7eff-a529-9590-31e7-b0007b416f81
* PDF: Fail fast if in the tree of resources a child references a parent. ↵Gravatar edisonn@google.com2012-10-18
| | | | | | | | Ideally I want a crash when the tree of resources became corrupt, not later when we try to finalize the pdf. Review URL: https://codereview.appspot.com/6740047 git-svn-id: http://skia.googlecode.com/svn/trunk@6006 2bbb7eff-a529-9590-31e7-b0007b416f81
* begin to skiafy PDF headers : removing use of SkRefPtrGravatar reed@google.com2012-09-19
| | | | | | Review URL: https://codereview.appspot.com/6526050 git-svn-id: http://skia.googlecode.com/svn/trunk@5596 2bbb7eff-a529-9590-31e7-b0007b416f81
* [PDF] Handle failures of matrix inversionGravatar vandebo@chromium.org2012-04-17
| | | | | | | | | Previously reviewed in https://codereview.appspot.com/6033047. Rolled back because of unrelated fixed-point bugs. Review URL: https://codereview.appspot.com/6052051 git-svn-id: http://skia.googlecode.com/svn/trunk@3715 2bbb7eff-a529-9590-31e7-b0007b416f81
* Revert "[PDF] Handle failures of matrix inversion" while I investigate fixed ↵Gravatar vandebo@chromium.org2012-04-17
| | | | | | | | | | point failures. This reverts commit r3711 Review URL: https://codereview.appspot.com/6050049 git-svn-id: http://skia.googlecode.com/svn/trunk@3712 2bbb7eff-a529-9590-31e7-b0007b416f81
* [PDF] Handle failures of matrix inversion.Gravatar vandebo@chromium.org2012-04-17
| | | | | | Review URL: https://codereview.appspot.com/6033047 git-svn-id: http://skia.googlecode.com/svn/trunk@3711 2bbb7eff-a529-9590-31e7-b0007b416f81
* [PDF] If matrix inversion fails, use the identity matrix.Gravatar vandebo@chromium.org2012-04-13
| | | | | | | | BUG=chrome:123078 Review URL: https://codereview.appspot.com/6007044 git-svn-id: http://skia.googlecode.com/svn/trunk@3676 2bbb7eff-a529-9590-31e7-b0007b416f81
* [PDF] Fix memory hungry inefficiency in pdf resource tracking.Gravatar vandebo@chromium.org2012-03-09
| | | | | | | | | | | | | When moving the content of a device into a PDF object like SkPDFFormXObject or SkPDFShader does, we only need the top level resources in the new object's resource list, not the recursive set of objects. Otherwise, when you put a form on a form on form, etc, references to the objects multiply. This fixed http://crbug.com/117321 Review URL: https://codereview.appspot.com/5796048 git-svn-id: http://skia.googlecode.com/svn/trunk@3360 2bbb7eff-a529-9590-31e7-b0007b416f81
* Automatic update of all copyright notices to reflect new license terms.Gravatar epoger@google.com2011-07-28
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | I have manually examined all of these diffs and restored a few files that seem to require manual adjustment. The following files still need to be modified manually, in a separate CL: android_sample/SampleApp/AndroidManifest.xml android_sample/SampleApp/res/layout/layout.xml android_sample/SampleApp/res/menu/sample.xml android_sample/SampleApp/res/values/strings.xml android_sample/SampleApp/src/com/skia/sampleapp/SampleApp.java android_sample/SampleApp/src/com/skia/sampleapp/SampleView.java experimental/CiCarbonSampleMain.c experimental/CocoaDebugger/main.m experimental/FileReaderApp/main.m experimental/SimpleCocoaApp/main.m experimental/iOSSampleApp/Shared/SkAlertPrompt.h experimental/iOSSampleApp/Shared/SkAlertPrompt.m experimental/iOSSampleApp/SkiOSSampleApp-Base.xcconfig experimental/iOSSampleApp/SkiOSSampleApp-Debug.xcconfig experimental/iOSSampleApp/SkiOSSampleApp-Release.xcconfig gpu/src/android/GrGLDefaultInterface_android.cpp gyp/common.gypi gyp_skia include/ports/SkHarfBuzzFont.h include/views/SkOSWindow_wxwidgets.h make.bat make.py src/opts/memset.arm.S src/opts/memset16_neon.S src/opts/memset32_neon.S src/opts/opts_check_arm.cpp src/ports/SkDebug_brew.cpp src/ports/SkMemory_brew.cpp src/ports/SkOSFile_brew.cpp src/ports/SkXMLParser_empty.cpp src/utils/ios/SkImageDecoder_iOS.mm src/utils/ios/SkOSFile_iOS.mm src/utils/ios/SkStream_NSData.mm tests/FillPathTest.cpp Review URL: http://codereview.appspot.com/4816058 git-svn-id: http://skia.googlecode.com/svn/trunk@1982 2bbb7eff-a529-9590-31e7-b0007b416f81
* replace SkRefPtr for parameters with simple pointersGravatar reed@google.com2011-07-20
| | | | git-svn-id: http://skia.googlecode.com/svn/trunk@1913 2bbb7eff-a529-9590-31e7-b0007b416f81
* [PDF] Use insert and append helpers for POD data.Gravatar vandebo@chromium.org2011-07-20
| | | | | | | | BUG=251 Review URL: http://codereview.appspot.com/4815044 git-svn-id: http://skia.googlecode.com/svn/trunk@1912 2bbb7eff-a529-9590-31e7-b0007b416f81
* [PDF] Make stream compression optional on a per device basis.Gravatar vandebo@chromium.org2011-07-20
| | | | | | | | | | | | | | | There are a lot of small pieces to make this change work: - SkPDFDocument (and SkPDFCatalog) take flags to disable compression (and font embedding - not implemented yet, can disable font subsetting for now). - SkPDFStream now defers compression until the size/emit step. - Classes that *had* a stream (because they didn't know the stream size at construction time) now *are* streams to make the substitution work correctly. - The SkPDFShader implementation got pulled apart into two classes, one that is a SkPDFDict, and one that is a SkPDFStream (making the common ancestor SkPDFObject). - Added helper methods in SkPDFObject for children that have simple resource lists. - Added an iterator to SkPDFDict so that a substitute SkPDFStream can get a copy of the stream dictionary. - Change SkPDFDocument to have a pointer to an SkPDFCatalog to remove a new circular header reference. Review URL: http://codereview.appspot.com/4700045 git-svn-id: http://skia.googlecode.com/svn/trunk@1911 2bbb7eff-a529-9590-31e7-b0007b416f81
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