SkDocument_PDF.cpp revision 72266fd1fe9bfe078239a9d9e85f479faee30281
199ac02bb701c1e30b20f2174aac25ffbe487c0afreed@google.com/* 2a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanary * Copyright 2011 Google Inc. 399ac02bb701c1e30b20f2174aac25ffbe487c0afreed@google.com * 499ac02bb701c1e30b20f2174aac25ffbe487c0afreed@google.com * Use of this source code is governed by a BSD-style license that can be 599ac02bb701c1e30b20f2174aac25ffbe487c0afreed@google.com * found in the LICENSE file. 699ac02bb701c1e30b20f2174aac25ffbe487c0afreed@google.com */ 799ac02bb701c1e30b20f2174aac25ffbe487c0afreed@google.com 899ac02bb701c1e30b20f2174aac25ffbe487c0afreed@google.com#include "SkDocument.h" 9a1f1ee98a1f6d0770f6243270ca2f0e6c92efabahalcanary#include "SkPDFCanon.h" 105867736b08d3689356b49f505bcf748c2194a0bcreed#include "SkPDFDevice.h" 11a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanary#include "SkPDFFont.h" 122f7ebcb424cd1d1acf07478157f86b0a3eafd712halcanary#include "SkPDFStream.h" 13a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanary#include "SkPDFTypes.h" 14a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanary#include "SkStream.h" 15a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanary 16a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanarystatic void emit_pdf_header(SkWStream* stream) { 17a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanary stream->writeText("%PDF-1.4\n%"); 18a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanary // The PDF spec recommends including a comment with four bytes, all 19a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanary // with their high bits set. This is "Skia" with the high bits set. 20a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanary stream->write32(0xD3EBE9E1); 21a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanary stream->writeText("\n"); 22a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanary} 23a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanary 24a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanarystatic void emit_pdf_footer(SkWStream* stream, 2537c46cad21632cfc1411b08d73af37a1fffe2944halcanary const SkPDFObjNumMap& objNumMap, 2637c46cad21632cfc1411b08d73af37a1fffe2944halcanary const SkPDFSubstituteMap& substitutes, 27a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanary SkPDFObject* docCatalog, 28a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanary int64_t objCount, 29a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanary int32_t xRefFileOffset) { 30a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanary SkPDFDict trailerDict; 31a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanary // TODO(vandebo): Linearized format will take a Prev entry too. 32a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanary // TODO(vandebo): PDF/A requires an ID entry. 33a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanary trailerDict.insertInt("Size", int(objCount)); 3472266fd1fe9bfe078239a9d9e85f479faee30281halcanary trailerDict.insertObjRef("Root", SkRef(docCatalog)); 35a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanary 36a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanary stream->writeText("trailer\n"); 3737c46cad21632cfc1411b08d73af37a1fffe2944halcanary trailerDict.emitObject(stream, objNumMap, substitutes); 38a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanary stream->writeText("\nstartxref\n"); 39a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanary stream->writeBigDecAsText(xRefFileOffset); 40a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanary stream->writeText("\n%%EOF"); 41a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanary} 42a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanary 432f7ebcb424cd1d1acf07478157f86b0a3eafd712halcanarystatic void perform_font_subsetting( 442f7ebcb424cd1d1acf07478157f86b0a3eafd712halcanary const SkTDArray<const SkPDFDevice*>& pageDevices, 4537c46cad21632cfc1411b08d73af37a1fffe2944halcanary SkPDFSubstituteMap* substituteMap) { 4637c46cad21632cfc1411b08d73af37a1fffe2944halcanary SkASSERT(substituteMap); 47a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanary 48a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanary SkPDFGlyphSetMap usage; 492f7ebcb424cd1d1acf07478157f86b0a3eafd712halcanary for (int i = 0; i < pageDevices.count(); ++i) { 502f7ebcb424cd1d1acf07478157f86b0a3eafd712halcanary usage.merge(pageDevices[i]->getFontGlyphUsage()); 51a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanary } 52a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanary SkPDFGlyphSetMap::F2BIter iterator(usage); 53a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanary const SkPDFGlyphSetMap::FontGlyphSetPair* entry = iterator.next(); 54a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanary while (entry) { 55a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanary SkAutoTUnref<SkPDFFont> subsetFont( 56a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanary entry->fFont->getFontSubset(entry->fGlyphSet)); 57a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanary if (subsetFont) { 5837c46cad21632cfc1411b08d73af37a1fffe2944halcanary substituteMap->setSubstitute(entry->fFont, subsetFont.get()); 59a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanary } 60a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanary entry = iterator.next(); 61a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanary } 62a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanary} 63a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanary 6472266fd1fe9bfe078239a9d9e85f479faee30281halcanarystatic SkPDFObject* create_pdf_page_content(const SkPDFDevice* pageDevice) { 6572266fd1fe9bfe078239a9d9e85f479faee30281halcanary SkAutoTDelete<SkStreamAsset> content(pageDevice->content()); 6672266fd1fe9bfe078239a9d9e85f479faee30281halcanary return SkNEW_ARGS(SkPDFStream, (content.get())); 6772266fd1fe9bfe078239a9d9e85f479faee30281halcanary} 6872266fd1fe9bfe078239a9d9e85f479faee30281halcanary 692f7ebcb424cd1d1acf07478157f86b0a3eafd712halcanarystatic SkPDFDict* create_pdf_page(const SkPDFDevice* pageDevice) { 702f7ebcb424cd1d1acf07478157f86b0a3eafd712halcanary SkAutoTUnref<SkPDFDict> page(SkNEW_ARGS(SkPDFDict, ("Page"))); 7172266fd1fe9bfe078239a9d9e85f479faee30281halcanary page->insertObject("Resources", pageDevice->createResourceDict()); 7272266fd1fe9bfe078239a9d9e85f479faee30281halcanary page->insertObject("MediaBox", pageDevice->copyMediaBox()); 7372266fd1fe9bfe078239a9d9e85f479faee30281halcanary if (SkPDFArray* annots = pageDevice->getAnnotations()) { 7472266fd1fe9bfe078239a9d9e85f479faee30281halcanary SkASSERT(annots->size() > 0); 7572266fd1fe9bfe078239a9d9e85f479faee30281halcanary page->insertObject("Annots", SkRef(annots)); 762f7ebcb424cd1d1acf07478157f86b0a3eafd712halcanary } 7772266fd1fe9bfe078239a9d9e85f479faee30281halcanary page->insertObjRef("Contents", create_pdf_page_content(pageDevice)); 782f7ebcb424cd1d1acf07478157f86b0a3eafd712halcanary return page.detach(); 792f7ebcb424cd1d1acf07478157f86b0a3eafd712halcanary} 802f7ebcb424cd1d1acf07478157f86b0a3eafd712halcanary 812f7ebcb424cd1d1acf07478157f86b0a3eafd712halcanarystatic void generate_page_tree(const SkTDArray<SkPDFDict*>& pages, 822f7ebcb424cd1d1acf07478157f86b0a3eafd712halcanary SkTDArray<SkPDFDict*>* pageTree, 832f7ebcb424cd1d1acf07478157f86b0a3eafd712halcanary SkPDFDict** rootNode) { 842f7ebcb424cd1d1acf07478157f86b0a3eafd712halcanary // PDF wants a tree describing all the pages in the document. We arbitrary 852f7ebcb424cd1d1acf07478157f86b0a3eafd712halcanary // choose 8 (kNodeSize) as the number of allowed children. The internal 862f7ebcb424cd1d1acf07478157f86b0a3eafd712halcanary // nodes have type "Pages" with an array of children, a parent pointer, and 872f7ebcb424cd1d1acf07478157f86b0a3eafd712halcanary // the number of leaves below the node as "Count." The leaves are passed 882f7ebcb424cd1d1acf07478157f86b0a3eafd712halcanary // into the method, have type "Page" and need a parent pointer. This method 892f7ebcb424cd1d1acf07478157f86b0a3eafd712halcanary // builds the tree bottom up, skipping internal nodes that would have only 902f7ebcb424cd1d1acf07478157f86b0a3eafd712halcanary // one child. 912f7ebcb424cd1d1acf07478157f86b0a3eafd712halcanary static const int kNodeSize = 8; 922f7ebcb424cd1d1acf07478157f86b0a3eafd712halcanary 932f7ebcb424cd1d1acf07478157f86b0a3eafd712halcanary // curNodes takes a reference to its items, which it passes to pageTree. 942f7ebcb424cd1d1acf07478157f86b0a3eafd712halcanary SkTDArray<SkPDFDict*> curNodes; 952f7ebcb424cd1d1acf07478157f86b0a3eafd712halcanary curNodes.setReserve(pages.count()); 962f7ebcb424cd1d1acf07478157f86b0a3eafd712halcanary for (int i = 0; i < pages.count(); i++) { 972f7ebcb424cd1d1acf07478157f86b0a3eafd712halcanary SkSafeRef(pages[i]); 982f7ebcb424cd1d1acf07478157f86b0a3eafd712halcanary curNodes.push(pages[i]); 992f7ebcb424cd1d1acf07478157f86b0a3eafd712halcanary } 1002f7ebcb424cd1d1acf07478157f86b0a3eafd712halcanary 1012f7ebcb424cd1d1acf07478157f86b0a3eafd712halcanary // nextRoundNodes passes its references to nodes on to curNodes. 1022f7ebcb424cd1d1acf07478157f86b0a3eafd712halcanary SkTDArray<SkPDFDict*> nextRoundNodes; 1032f7ebcb424cd1d1acf07478157f86b0a3eafd712halcanary nextRoundNodes.setReserve((pages.count() + kNodeSize - 1)/kNodeSize); 1042f7ebcb424cd1d1acf07478157f86b0a3eafd712halcanary 1052f7ebcb424cd1d1acf07478157f86b0a3eafd712halcanary int treeCapacity = kNodeSize; 1062f7ebcb424cd1d1acf07478157f86b0a3eafd712halcanary do { 1072f7ebcb424cd1d1acf07478157f86b0a3eafd712halcanary for (int i = 0; i < curNodes.count(); ) { 1082f7ebcb424cd1d1acf07478157f86b0a3eafd712halcanary if (i > 0 && i + 1 == curNodes.count()) { 1092f7ebcb424cd1d1acf07478157f86b0a3eafd712halcanary nextRoundNodes.push(curNodes[i]); 1102f7ebcb424cd1d1acf07478157f86b0a3eafd712halcanary break; 1112f7ebcb424cd1d1acf07478157f86b0a3eafd712halcanary } 1122f7ebcb424cd1d1acf07478157f86b0a3eafd712halcanary 11372266fd1fe9bfe078239a9d9e85f479faee30281halcanary SkAutoTUnref<SkPDFDict> newNode(new SkPDFDict("Pages")); 1142f7ebcb424cd1d1acf07478157f86b0a3eafd712halcanary SkAutoTUnref<SkPDFArray> kids(new SkPDFArray); 1152f7ebcb424cd1d1acf07478157f86b0a3eafd712halcanary kids->reserve(kNodeSize); 1162f7ebcb424cd1d1acf07478157f86b0a3eafd712halcanary 1172f7ebcb424cd1d1acf07478157f86b0a3eafd712halcanary int count = 0; 1182f7ebcb424cd1d1acf07478157f86b0a3eafd712halcanary for (; i < curNodes.count() && count < kNodeSize; i++, count++) { 11972266fd1fe9bfe078239a9d9e85f479faee30281halcanary curNodes[i]->insertObjRef("Parent", SkRef(newNode.get())); 12072266fd1fe9bfe078239a9d9e85f479faee30281halcanary kids->appendObjRef(SkRef(curNodes[i])); 1212f7ebcb424cd1d1acf07478157f86b0a3eafd712halcanary 1222f7ebcb424cd1d1acf07478157f86b0a3eafd712halcanary // TODO(vandebo): put the objects in strict access order. 1232f7ebcb424cd1d1acf07478157f86b0a3eafd712halcanary // Probably doesn't matter because they are so small. 1242f7ebcb424cd1d1acf07478157f86b0a3eafd712halcanary if (curNodes[i] != pages[0]) { 1252f7ebcb424cd1d1acf07478157f86b0a3eafd712halcanary pageTree->push(curNodes[i]); // Transfer reference. 1262f7ebcb424cd1d1acf07478157f86b0a3eafd712halcanary } else { 1272f7ebcb424cd1d1acf07478157f86b0a3eafd712halcanary SkSafeUnref(curNodes[i]); 1282f7ebcb424cd1d1acf07478157f86b0a3eafd712halcanary } 1292f7ebcb424cd1d1acf07478157f86b0a3eafd712halcanary } 1302f7ebcb424cd1d1acf07478157f86b0a3eafd712halcanary 1312f7ebcb424cd1d1acf07478157f86b0a3eafd712halcanary // treeCapacity is the number of leaf nodes possible for the 1322f7ebcb424cd1d1acf07478157f86b0a3eafd712halcanary // current set of subtrees being generated. (i.e. 8, 64, 512, ...). 1332f7ebcb424cd1d1acf07478157f86b0a3eafd712halcanary // It is hard to count the number of leaf nodes in the current 1342f7ebcb424cd1d1acf07478157f86b0a3eafd712halcanary // subtree. However, by construction, we know that unless it's the 1352f7ebcb424cd1d1acf07478157f86b0a3eafd712halcanary // last subtree for the current depth, the leaf count will be 1362f7ebcb424cd1d1acf07478157f86b0a3eafd712halcanary // treeCapacity, otherwise it's what ever is left over after 1372f7ebcb424cd1d1acf07478157f86b0a3eafd712halcanary // consuming treeCapacity chunks. 1382f7ebcb424cd1d1acf07478157f86b0a3eafd712halcanary int pageCount = treeCapacity; 1392f7ebcb424cd1d1acf07478157f86b0a3eafd712halcanary if (i == curNodes.count()) { 1402f7ebcb424cd1d1acf07478157f86b0a3eafd712halcanary pageCount = ((pages.count() - 1) % treeCapacity) + 1; 1412f7ebcb424cd1d1acf07478157f86b0a3eafd712halcanary } 14272266fd1fe9bfe078239a9d9e85f479faee30281halcanary newNode->insertInt("Count", pageCount); 14372266fd1fe9bfe078239a9d9e85f479faee30281halcanary newNode->insertObject("Kids", kids.detach()); 14472266fd1fe9bfe078239a9d9e85f479faee30281halcanary nextRoundNodes.push(newNode.detach()); // Transfer reference. 1452f7ebcb424cd1d1acf07478157f86b0a3eafd712halcanary } 1462f7ebcb424cd1d1acf07478157f86b0a3eafd712halcanary 1472f7ebcb424cd1d1acf07478157f86b0a3eafd712halcanary curNodes = nextRoundNodes; 1482f7ebcb424cd1d1acf07478157f86b0a3eafd712halcanary nextRoundNodes.rewind(); 1492f7ebcb424cd1d1acf07478157f86b0a3eafd712halcanary treeCapacity *= kNodeSize; 1502f7ebcb424cd1d1acf07478157f86b0a3eafd712halcanary } while (curNodes.count() > 1); 1512f7ebcb424cd1d1acf07478157f86b0a3eafd712halcanary 1522f7ebcb424cd1d1acf07478157f86b0a3eafd712halcanary pageTree->push(curNodes[0]); // Transfer reference. 1532f7ebcb424cd1d1acf07478157f86b0a3eafd712halcanary if (rootNode) { 1542f7ebcb424cd1d1acf07478157f86b0a3eafd712halcanary *rootNode = curNodes[0]; 1552f7ebcb424cd1d1acf07478157f86b0a3eafd712halcanary } 1562f7ebcb424cd1d1acf07478157f86b0a3eafd712halcanary} 1572f7ebcb424cd1d1acf07478157f86b0a3eafd712halcanary 158a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanarystatic bool emit_pdf_document(const SkTDArray<const SkPDFDevice*>& pageDevices, 159a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanary SkWStream* stream) { 160a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanary if (pageDevices.isEmpty()) { 161a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanary return false; 162a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanary } 163a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanary 1642f7ebcb424cd1d1acf07478157f86b0a3eafd712halcanary SkTDArray<SkPDFDict*> pages; 165a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanary SkAutoTUnref<SkPDFDict> dests(SkNEW(SkPDFDict)); 166a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanary 167a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanary for (int i = 0; i < pageDevices.count(); i++) { 168a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanary SkASSERT(pageDevices[i]); 169a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanary SkASSERT(i == 0 || 170a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanary pageDevices[i - 1]->getCanon() == pageDevices[i]->getCanon()); 1712f7ebcb424cd1d1acf07478157f86b0a3eafd712halcanary SkAutoTUnref<SkPDFDict> page(create_pdf_page(pageDevices[i])); 1722f7ebcb424cd1d1acf07478157f86b0a3eafd712halcanary pageDevices[i]->appendDestinations(dests, page.get()); 173a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanary pages.push(page.detach()); 174a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanary } 175a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanary 176a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanary SkTDArray<SkPDFDict*> pageTree; 177a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanary SkAutoTUnref<SkPDFDict> docCatalog(SkNEW_ARGS(SkPDFDict, ("Catalog"))); 178a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanary 179a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanary SkPDFDict* pageTreeRoot; 1802f7ebcb424cd1d1acf07478157f86b0a3eafd712halcanary generate_page_tree(pages, &pageTree, &pageTreeRoot); 18172266fd1fe9bfe078239a9d9e85f479faee30281halcanary docCatalog->insertObjRef("Pages", SkRef(pageTreeRoot)); 182a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanary 18372266fd1fe9bfe078239a9d9e85f479faee30281halcanary if (dests->size() > 0) { 18472266fd1fe9bfe078239a9d9e85f479faee30281halcanary docCatalog->insertObjRef("Dests", dests.detach()); 18572266fd1fe9bfe078239a9d9e85f479faee30281halcanary } 186a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanary 187a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanary /* TODO(vandebo): output intent 188a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanary SkAutoTUnref<SkPDFDict> outputIntent = new SkPDFDict("OutputIntent"); 18972266fd1fe9bfe078239a9d9e85f479faee30281halcanary outputIntent->insertName("S", "GTS_PDFA1"); 19072266fd1fe9bfe078239a9d9e85f479faee30281halcanary outputIntent->insertString("OutputConditionIdentifier", "sRGB"); 19172266fd1fe9bfe078239a9d9e85f479faee30281halcanary SkAutoTUnref<SkPDFArray> intentArray(new SkPDFArray); 19272266fd1fe9bfe078239a9d9e85f479faee30281halcanary intentArray->appendObject(SkRef(outputIntent.get())); 19372266fd1fe9bfe078239a9d9e85f479faee30281halcanary docCatalog->insertObject("OutputIntent", intentArray.detach()); 194a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanary */ 195a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanary 196a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanary // Build font subsetting info before proceeding. 19737c46cad21632cfc1411b08d73af37a1fffe2944halcanary SkPDFSubstituteMap substitutes; 19837c46cad21632cfc1411b08d73af37a1fffe2944halcanary perform_font_subsetting(pageDevices, &substitutes); 199a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanary 20037c46cad21632cfc1411b08d73af37a1fffe2944halcanary SkPDFObjNumMap objNumMap; 20137c46cad21632cfc1411b08d73af37a1fffe2944halcanary if (objNumMap.addObject(docCatalog.get())) { 20237c46cad21632cfc1411b08d73af37a1fffe2944halcanary docCatalog->addResources(&objNumMap, substitutes); 203a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanary } 204a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanary size_t baseOffset = SkToOffT(stream->bytesWritten()); 205a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanary emit_pdf_header(stream); 206a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanary SkTDArray<int32_t> offsets; 20737c46cad21632cfc1411b08d73af37a1fffe2944halcanary for (int i = 0; i < objNumMap.objects().count(); ++i) { 20837c46cad21632cfc1411b08d73af37a1fffe2944halcanary SkPDFObject* object = objNumMap.objects()[i]; 209a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanary offsets.push(SkToS32(stream->bytesWritten() - baseOffset)); 21037c46cad21632cfc1411b08d73af37a1fffe2944halcanary SkASSERT(object == substitutes.getSubstitute(object)); 21137c46cad21632cfc1411b08d73af37a1fffe2944halcanary SkASSERT(objNumMap.getObjectNumber(object) == i + 1); 212a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanary stream->writeDecAsText(i + 1); 213a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanary stream->writeText(" 0 obj\n"); // Generation number is always 0. 21437c46cad21632cfc1411b08d73af37a1fffe2944halcanary object->emitObject(stream, objNumMap, substitutes); 215a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanary stream->writeText("\nendobj\n"); 216a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanary } 217a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanary int32_t xRefFileOffset = SkToS32(stream->bytesWritten() - baseOffset); 218a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanary 21941f88f0251cf48eb06f3f8d143aac8562a230889halcanary // Include the zeroth object in the count. 220a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanary int32_t objCount = SkToS32(offsets.count() + 1); 221a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanary 222a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanary stream->writeText("xref\n0 "); 22341f88f0251cf48eb06f3f8d143aac8562a230889halcanary stream->writeDecAsText(objCount); 224a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanary stream->writeText("\n0000000000 65535 f \n"); 225a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanary for (int i = 0; i < offsets.count(); i++) { 226a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanary SkASSERT(offsets[i] > 0); 227a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanary stream->writeBigDecAsText(offsets[i], 10); 228a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanary stream->writeText(" 00000 n \n"); 229a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanary } 23037c46cad21632cfc1411b08d73af37a1fffe2944halcanary emit_pdf_footer(stream, objNumMap, substitutes, docCatalog.get(), objCount, 231a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanary xRefFileOffset); 232a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanary 233a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanary // The page tree has both child and parent pointers, so it creates a 234a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanary // reference cycle. We must clear that cycle to properly reclaim memory. 235a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanary for (int i = 0; i < pageTree.count(); i++) { 236a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanary pageTree[i]->clear(); 237a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanary } 238a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanary pageTree.safeUnrefAll(); 239a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanary pages.unrefAll(); 240a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanary return true; 241a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanary} 242a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanary 243a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanary#if 0 244a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanary// TODO(halcanary): expose notEmbeddableCount in SkDocument 245a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanaryvoid GetCountOfFontTypes( 246a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanary const SkTDArray<SkPDFDevice*>& pageDevices, 247a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanary int counts[SkAdvancedTypefaceMetrics::kOther_Font + 1], 248a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanary int* notSubsettableCount, 249a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanary int* notEmbeddableCount) { 250a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanary sk_bzero(counts, sizeof(int) * 251a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanary (SkAdvancedTypefaceMetrics::kOther_Font + 1)); 252a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanary SkTDArray<SkFontID> seenFonts; 253a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanary int notSubsettable = 0; 254a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanary int notEmbeddable = 0; 255a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanary 256a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanary for (int pageNumber = 0; pageNumber < pageDevices.count(); pageNumber++) { 257a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanary const SkTDArray<SkPDFFont*>& fontResources = 258a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanary pageDevices[pageNumber]->getFontResources(); 259a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanary for (int font = 0; font < fontResources.count(); font++) { 260a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanary SkFontID fontID = fontResources[font]->typeface()->uniqueID(); 261a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanary if (seenFonts.find(fontID) == -1) { 262a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanary counts[fontResources[font]->getType()]++; 263a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanary seenFonts.push(fontID); 264a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanary if (!fontResources[font]->canSubset()) { 265a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanary notSubsettable++; 266a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanary } 267a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanary if (!fontResources[font]->canEmbed()) { 268a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanary notEmbeddable++; 269a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanary } 270a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanary } 271a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanary } 272a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanary } 273a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanary if (notSubsettableCount) { 274a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanary *notSubsettableCount = notSubsettable; 275a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanary 276a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanary } 277a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanary if (notEmbeddableCount) { 278a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanary *notEmbeddableCount = notEmbeddable; 279a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanary } 280a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanary} 281a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanary#endif 282a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanary//////////////////////////////////////////////////////////////////////////////// 28399ac02bb701c1e30b20f2174aac25ffbe487c0afreed@google.com 2847a0118465a2dd1783d7b19b026bedd7e13afadf2halcanarynamespace { 28599ac02bb701c1e30b20f2174aac25ffbe487c0afreed@google.comclass SkDocument_PDF : public SkDocument { 28699ac02bb701c1e30b20f2174aac25ffbe487c0afreed@google.compublic: 2878c92dc1dc281649f9e6b0ff534c25bc89dded3eahalcanary SkDocument_PDF(SkWStream* stream, 288792c80f5a7b66e75d42664ccb298f31962c6654chalcanary void (*doneProc)(SkWStream*, bool), 2898c294900f31d8d032b62182f011019276d27d5d0commit-bot@chromium.org SkScalar rasterDpi) 2908c92dc1dc281649f9e6b0ff534c25bc89dded3eahalcanary : SkDocument(stream, doneProc) 2918c92dc1dc281649f9e6b0ff534c25bc89dded3eahalcanary , fRasterDpi(rasterDpi) {} 2926319367bdcbf5e5050632ab97973f5035d0dd8faskia.committer@gmail.com 29399ac02bb701c1e30b20f2174aac25ffbe487c0afreed@google.com virtual ~SkDocument_PDF() { 29499ac02bb701c1e30b20f2174aac25ffbe487c0afreed@google.com // subclasses must call close() in their destructors 29599ac02bb701c1e30b20f2174aac25ffbe487c0afreed@google.com this->close(); 29699ac02bb701c1e30b20f2174aac25ffbe487c0afreed@google.com } 29799ac02bb701c1e30b20f2174aac25ffbe487c0afreed@google.com 29899ac02bb701c1e30b20f2174aac25ffbe487c0afreed@google.comprotected: 299f4219ddf31b2171a5576ab98d1fd2deab4d816fdtfarina SkCanvas* onBeginPage(SkScalar width, SkScalar height, 300f4219ddf31b2171a5576ab98d1fd2deab4d816fdtfarina const SkRect& trimBox) override { 301a1f1ee98a1f6d0770f6243270ca2f0e6c92efabahalcanary SkASSERT(!fCanvas.get()); 30299ac02bb701c1e30b20f2174aac25ffbe487c0afreed@google.com 303a1f1ee98a1f6d0770f6243270ca2f0e6c92efabahalcanary SkISize pageSize = SkISize::Make( 304a1f1ee98a1f6d0770f6243270ca2f0e6c92efabahalcanary SkScalarRoundToInt(width), SkScalarRoundToInt(height)); 3057a0118465a2dd1783d7b19b026bedd7e13afadf2halcanary SkAutoTUnref<SkPDFDevice> device( 3067a0118465a2dd1783d7b19b026bedd7e13afadf2halcanary SkPDFDevice::Create(pageSize, fRasterDpi, &fCanon)); 3077a0118465a2dd1783d7b19b026bedd7e13afadf2halcanary fCanvas.reset(SkNEW_ARGS(SkCanvas, (device.get()))); 3087a0118465a2dd1783d7b19b026bedd7e13afadf2halcanary fPageDevices.push(device.detach()); 309be519ad718371cc40c432572173e47f851476486halcanary fCanvas->clipRect(trimBox); 31093f816129356d6764a9402817cc36bffd8f991fbhalcanary fCanvas->translate(trimBox.x(), trimBox.y()); 311a1f1ee98a1f6d0770f6243270ca2f0e6c92efabahalcanary return fCanvas.get(); 31299ac02bb701c1e30b20f2174aac25ffbe487c0afreed@google.com } 31399ac02bb701c1e30b20f2174aac25ffbe487c0afreed@google.com 31436352bf5e38f45a70ee4f4fc132a38048d38206dmtklein void onEndPage() override { 315a1f1ee98a1f6d0770f6243270ca2f0e6c92efabahalcanary SkASSERT(fCanvas.get()); 31699ac02bb701c1e30b20f2174aac25ffbe487c0afreed@google.com fCanvas->flush(); 317a1f1ee98a1f6d0770f6243270ca2f0e6c92efabahalcanary fCanvas.reset(NULL); 31899ac02bb701c1e30b20f2174aac25ffbe487c0afreed@google.com } 31999ac02bb701c1e30b20f2174aac25ffbe487c0afreed@google.com 32036352bf5e38f45a70ee4f4fc132a38048d38206dmtklein bool onClose(SkWStream* stream) override { 321a1f1ee98a1f6d0770f6243270ca2f0e6c92efabahalcanary SkASSERT(!fCanvas.get()); 32299ac02bb701c1e30b20f2174aac25ffbe487c0afreed@google.com 323a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanary bool success = emit_pdf_document(fPageDevices, stream); 3247a0118465a2dd1783d7b19b026bedd7e13afadf2halcanary fPageDevices.unrefAll(); 3252e3f9d8a9309686eeb4c76ccfde5800da87a68b3halcanary fCanon.reset(); 326b5a6651f9f69570d964382134d64360915db9a29commit-bot@chromium.org return success; 327b5a6651f9f69570d964382134d64360915db9a29commit-bot@chromium.org } 328b5a6651f9f69570d964382134d64360915db9a29commit-bot@chromium.org 32936352bf5e38f45a70ee4f4fc132a38048d38206dmtklein void onAbort() override { 3307a0118465a2dd1783d7b19b026bedd7e13afadf2halcanary fPageDevices.unrefAll(); 3312e3f9d8a9309686eeb4c76ccfde5800da87a68b3halcanary fCanon.reset(); 33299ac02bb701c1e30b20f2174aac25ffbe487c0afreed@google.com } 33399ac02bb701c1e30b20f2174aac25ffbe487c0afreed@google.com 33499ac02bb701c1e30b20f2174aac25ffbe487c0afreed@google.comprivate: 335a1f1ee98a1f6d0770f6243270ca2f0e6c92efabahalcanary SkPDFCanon fCanon; 3366d622703e578eddc64ab4e3340d0ab0033268799halcanary SkTDArray<const SkPDFDevice*> fPageDevices; 337a1f1ee98a1f6d0770f6243270ca2f0e6c92efabahalcanary SkAutoTUnref<SkCanvas> fCanvas; 338a1f1ee98a1f6d0770f6243270ca2f0e6c92efabahalcanary SkScalar fRasterDpi; 33999ac02bb701c1e30b20f2174aac25ffbe487c0afreed@google.com}; 3407a0118465a2dd1783d7b19b026bedd7e13afadf2halcanary} // namespace 34199ac02bb701c1e30b20f2174aac25ffbe487c0afreed@google.com/////////////////////////////////////////////////////////////////////////////// 34299ac02bb701c1e30b20f2174aac25ffbe487c0afreed@google.com 3438c92dc1dc281649f9e6b0ff534c25bc89dded3eahalcanarySkDocument* SkDocument::CreatePDF(SkWStream* stream, SkScalar dpi) { 3448c92dc1dc281649f9e6b0ff534c25bc89dded3eahalcanary return stream ? SkNEW_ARGS(SkDocument_PDF, (stream, NULL, dpi)) : NULL; 34599ac02bb701c1e30b20f2174aac25ffbe487c0afreed@google.com} 34699ac02bb701c1e30b20f2174aac25ffbe487c0afreed@google.com 3478c92dc1dc281649f9e6b0ff534c25bc89dded3eahalcanarySkDocument* SkDocument::CreatePDF(const char path[], SkScalar dpi) { 34899ac02bb701c1e30b20f2174aac25ffbe487c0afreed@google.com SkFILEWStream* stream = SkNEW_ARGS(SkFILEWStream, (path)); 34999ac02bb701c1e30b20f2174aac25ffbe487c0afreed@google.com if (!stream->isValid()) { 35099ac02bb701c1e30b20f2174aac25ffbe487c0afreed@google.com SkDELETE(stream); 35199ac02bb701c1e30b20f2174aac25ffbe487c0afreed@google.com return NULL; 35299ac02bb701c1e30b20f2174aac25ffbe487c0afreed@google.com } 353a43b41538ad6af0f2b7742b4ade8265d344b9d64halcanary auto delete_wstream = [](SkWStream* stream, bool) { SkDELETE(stream); }; 3548c92dc1dc281649f9e6b0ff534c25bc89dded3eahalcanary return SkNEW_ARGS(SkDocument_PDF, (stream, delete_wstream, dpi)); 35599ac02bb701c1e30b20f2174aac25ffbe487c0afreed@google.com} 356