aboutsummaryrefslogtreecommitdiffhomepage
path: root/src/pdf/SkPDFDocument.cpp
blob: 92e82fc0183264a6cc653d0399e4d9747e5321b2 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
/*
 * Copyright 2011 Google Inc.
 *
 * Use of this source code is governed by a BSD-style license that can be
 * found in the LICENSE file.
 */

#include "SkMakeUnique.h"
#include "SkPDFCanon.h"
#include "SkPDFCanvas.h"
#include "SkPDFDevice.h"
#include "SkPDFDocument.h"
#include "SkPDFUtils.h"
#include "SkStream.h"

SkPDFObjectSerializer::SkPDFObjectSerializer() : fBaseOffset(0), fNextToBeSerialized(0) {}

template <class T> static void renew(T* t) { t->~T(); new (t) T; }

SkPDFObjectSerializer::~SkPDFObjectSerializer() {
    for (int i = 0; i < fObjNumMap.objects().count(); ++i) {
        fObjNumMap.objects()[i]->drop();
    }
}

void SkPDFObjectSerializer::addObjectRecursively(const sk_sp<SkPDFObject>& object) {
    fObjNumMap.addObjectRecursively(object.get());
}

#define SKPDF_MAGIC "\xD3\xEB\xE9\xE1"
#ifndef SK_BUILD_FOR_WIN32
static_assert((SKPDF_MAGIC[0] & 0x7F) == "Skia"[0], "");
static_assert((SKPDF_MAGIC[1] & 0x7F) == "Skia"[1], "");
static_assert((SKPDF_MAGIC[2] & 0x7F) == "Skia"[2], "");
static_assert((SKPDF_MAGIC[3] & 0x7F) == "Skia"[3], "");
#endif
void SkPDFObjectSerializer::serializeHeader(SkWStream* wStream,
                                            const SkDocument::PDFMetadata& md) {
    fBaseOffset = wStream->bytesWritten();
    static const char kHeader[] = "%PDF-1.4\n%" SKPDF_MAGIC "\n";
    wStream->write(kHeader, strlen(kHeader));
    // The PDF spec recommends including a comment with four
    // bytes, all with their high bits set.  "\xD3\xEB\xE9\xE1" is
    // "Skia" with the high bits set.
    fInfoDict = SkPDFMetadata::MakeDocumentInformationDict(md);
    this->addObjectRecursively(fInfoDict);
    this->serializeObjects(wStream);
}
#undef SKPDF_MAGIC

// Serialize all objects in the fObjNumMap that have not yet been serialized;
void SkPDFObjectSerializer::serializeObjects(SkWStream* wStream) {
    const SkTArray<sk_sp<SkPDFObject>>& objects = fObjNumMap.objects();
    while (fNextToBeSerialized < objects.count()) {
        SkPDFObject* object = objects[fNextToBeSerialized].get();
        int32_t index = fNextToBeSerialized + 1;  // Skip object 0.
        // "The first entry in the [XREF] table (object number 0) is
        // always free and has a generation number of 65,535; it is
        // the head of the linked list of free objects."
        SkASSERT(fOffsets.count() == fNextToBeSerialized);
        fOffsets.push(this->offset(wStream));
        wStream->writeDecAsText(index);
        wStream->writeText(" 0 obj\n");  // Generation number is always 0.
        object->emitObject(wStream, fObjNumMap);
        wStream->writeText("\nendobj\n");
        object->drop();
        ++fNextToBeSerialized;
    }
}

// Xref table and footer
void SkPDFObjectSerializer::serializeFooter(SkWStream* wStream,
                                            const sk_sp<SkPDFObject> docCatalog,
                                            sk_sp<SkPDFObject> id) {
    this->serializeObjects(wStream);
    int32_t xRefFileOffset = this->offset(wStream);
    // Include the special zeroth object in the count.
    int32_t objCount = SkToS32(fOffsets.count() + 1);
    wStream->writeText("xref\n0 ");
    wStream->writeDecAsText(objCount);
    wStream->writeText("\n0000000000 65535 f \n");
    for (int i = 0; i < fOffsets.count(); i++) {
        wStream->writeBigDecAsText(fOffsets[i], 10);
        wStream->writeText(" 00000 n \n");
    }
    SkPDFDict trailerDict;
    trailerDict.insertInt("Size", objCount);
    SkASSERT(docCatalog);
    trailerDict.insertObjRef("Root", docCatalog);
    SkASSERT(fInfoDict);
    trailerDict.insertObjRef("Info", std::move(fInfoDict));
    if (id) {
        trailerDict.insertObject("ID", std::move(id));
    }
    wStream->writeText("trailer\n");
    trailerDict.emitObject(wStream, fObjNumMap);
    wStream->writeText("\nstartxref\n");
    wStream->writeBigDecAsText(xRefFileOffset);
    wStream->writeText("\n%%EOF");
}

int32_t SkPDFObjectSerializer::offset(SkWStream* wStream) {
    size_t offset = wStream->bytesWritten();
    SkASSERT(offset > fBaseOffset);
    return SkToS32(offset - fBaseOffset);
}


// return root node.
static sk_sp<SkPDFDict> generate_page_tree(SkTArray<sk_sp<SkPDFDict>>* pages) {
    // PDF wants a tree describing all the pages in the document.  We arbitrary
    // choose 8 (kNodeSize) as the number of allowed children.  The internal
    // nodes have type "Pages" with an array of children, a parent pointer, and
    // the number of leaves below the node as "Count."  The leaves are passed
    // into the method, have type "Page" and need a parent pointer. This method
    // builds the tree bottom up, skipping internal nodes that would have only
    // one child.
    static const int kNodeSize = 8;

    // curNodes takes a reference to its items, which it passes to pageTree.
    int totalPageCount = pages->count();
    SkTArray<sk_sp<SkPDFDict>> curNodes;
    curNodes.swap(pages);

    // nextRoundNodes passes its references to nodes on to curNodes.
    int treeCapacity = kNodeSize;
    do {
        SkTArray<sk_sp<SkPDFDict>> nextRoundNodes;
        for (int i = 0; i < curNodes.count(); ) {
            if (i > 0 && i + 1 == curNodes.count()) {
                SkASSERT(curNodes[i]);
                nextRoundNodes.emplace_back(std::move(curNodes[i]));
                break;
            }

            auto newNode = sk_make_sp<SkPDFDict>("Pages");
            auto kids = sk_make_sp<SkPDFArray>();
            kids->reserve(kNodeSize);

            int count = 0;
            for (; i < curNodes.count() && count < kNodeSize; i++, count++) {
                SkASSERT(curNodes[i]);
                curNodes[i]->insertObjRef("Parent", newNode);
                kids->appendObjRef(std::move(curNodes[i]));
            }

            // treeCapacity is the number of leaf nodes possible for the
            // current set of subtrees being generated. (i.e. 8, 64, 512, ...).
            // It is hard to count the number of leaf nodes in the current
            // subtree. However, by construction, we know that unless it's the
            // last subtree for the current depth, the leaf count will be
            // treeCapacity, otherwise it's what ever is left over after
            // consuming treeCapacity chunks.
            int pageCount = treeCapacity;
            if (i == curNodes.count()) {
                pageCount = ((totalPageCount - 1) % treeCapacity) + 1;
            }
            newNode->insertInt("Count", pageCount);
            newNode->insertObject("Kids", std::move(kids));
            nextRoundNodes.emplace_back(std::move(newNode));
        }
        SkDEBUGCODE( for (const auto& n : curNodes) { SkASSERT(!n); } );

        curNodes.swap(&nextRoundNodes);
        nextRoundNodes.reset();
        treeCapacity *= kNodeSize;
    } while (curNodes.count() > 1);
    return std::move(curNodes[0]);
}

////////////////////////////////////////////////////////////////////////////////

SkPDFDocument::SkPDFDocument(SkWStream* stream,
                             void (*doneProc)(SkWStream*, bool),
                             SkScalar rasterDpi,
                             const SkDocument::PDFMetadata& metadata,
                             sk_sp<SkPixelSerializer> jpegEncoder,
                             bool pdfa)
    : SkDocument(stream, doneProc)
    , fRasterDpi(rasterDpi)
    , fMetadata(metadata)
    , fPDFA(pdfa) {
    fCanon.setPixelSerializer(std::move(jpegEncoder));
}

SkPDFDocument::~SkPDFDocument() {
    // subclasses of SkDocument must call close() in their destructors.
    this->close();
}

void SkPDFDocument::serialize(const sk_sp<SkPDFObject>& object) {
    fObjectSerializer.addObjectRecursively(object);
    fObjectSerializer.serializeObjects(this->getStream());
}

SkCanvas* SkPDFDocument::onBeginPage(SkScalar width, SkScalar height,
                                     const SkRect& trimBox) {
    SkASSERT(!fCanvas.get());  // endPage() was called before this.
    if (fPages.empty()) {
        // if this is the first page if the document.
        fObjectSerializer.serializeHeader(this->getStream(), fMetadata);
        fDests = sk_make_sp<SkPDFDict>();
        if (fPDFA) {
            SkPDFMetadata::UUID uuid = SkPDFMetadata::CreateUUID(fMetadata);
            // We use the same UUID for Document ID and Instance ID since this
            // is the first revision of this document (and Skia does not
            // support revising existing PDF documents).
            // If we are not in PDF/A mode, don't use a UUID since testing
            // works best with reproducible outputs.
            fID = SkPDFMetadata::MakePdfId(uuid, uuid);
            fXMP = SkPDFMetadata::MakeXMPObject(fMetadata, uuid, uuid);
            fObjectSerializer.addObjectRecursively(fXMP);
            fObjectSerializer.serializeObjects(this->getStream());
        }
    }
    SkISize pageSize = SkISize::Make(
            SkScalarRoundToInt(width), SkScalarRoundToInt(height));
    fPageDevice.reset(
            SkPDFDevice::Create(pageSize, fRasterDpi, this));
    fCanvas.reset(new SkPDFCanvas(fPageDevice));
    fCanvas->clipRect(trimBox);
    fCanvas->translate(trimBox.x(), trimBox.y());
    return fCanvas.get();
}

void SkPDFDocument::onEndPage() {
    SkASSERT(fCanvas.get());
    fCanvas->flush();
    fCanvas.reset(nullptr);
    SkASSERT(fPageDevice);
    auto page = sk_make_sp<SkPDFDict>("Page");
    page->insertObject("Resources", fPageDevice->makeResourceDict());
    page->insertObject("MediaBox", fPageDevice->copyMediaBox());
    auto annotations = sk_make_sp<SkPDFArray>();
    fPageDevice->appendAnnotations(annotations.get());
    if (annotations->size() > 0) {
        page->insertObject("Annots", std::move(annotations));
    }
    auto contentObject = sk_make_sp<SkPDFStream>(fPageDevice->content());
    this->serialize(contentObject);
    page->insertObjRef("Contents", std::move(contentObject));
    fPageDevice->appendDestinations(fDests.get(), page.get());
    fPages.emplace_back(std::move(page));
    fPageDevice.reset(nullptr);
}

void SkPDFDocument::onAbort() {
    this->reset();
}

void SkPDFDocument::reset() {
    fCanvas.reset(nullptr);
    fPages.reset();
    fCanon.reset();
    renew(&fObjectSerializer);
    fFonts.reset();
}

static sk_sp<SkData> SkSrgbIcm() {
    // Source: http://www.argyllcms.com/icclibsrc.html
    static const char kProfile[] =
        "\0\0\14\214argl\2 \0\0mntrRGB XYZ \7\336\0\1\0\6\0\26\0\17\0:acspM"
        "SFT\0\0\0\0IEC sRGB\0\0\0\0\0\0\0\0\0\0\0\0\0\0\366\326\0\1\0\0\0\0"
        "\323-argl\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"
        "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\21desc\0\0\1P\0\0\0\231cprt\0"
        "\0\1\354\0\0\0gdmnd\0\0\2T\0\0\0pdmdd\0\0\2\304\0\0\0\210tech\0\0\3"
        "L\0\0\0\14vued\0\0\3X\0\0\0gview\0\0\3\300\0\0\0$lumi\0\0\3\344\0\0"
        "\0\24meas\0\0\3\370\0\0\0$wtpt\0\0\4\34\0\0\0\24bkpt\0\0\0040\0\0\0"
        "\24rXYZ\0\0\4D\0\0\0\24gXYZ\0\0\4X\0\0\0\24bXYZ\0\0\4l\0\0\0\24rTR"
        "C\0\0\4\200\0\0\10\14gTRC\0\0\4\200\0\0\10\14bTRC\0\0\4\200\0\0\10"
        "\14desc\0\0\0\0\0\0\0?sRGB IEC61966-2.1 (Equivalent to www.srgb.co"
        "m 1998 HP profile)\0\0\0\0\0\0\0\0\0\0\0?sRGB IEC61966-2.1 (Equiva"
        "lent to www.srgb.com 1998 HP profile)\0\0\0\0\0\0\0\0text\0\0\0\0C"
        "reated by Graeme W. Gill. Released into the public domain. No Warr"
        "anty, Use at your own risk.\0\0desc\0\0\0\0\0\0\0\26IEC http://www"
        ".iec.ch\0\0\0\0\0\0\0\0\0\0\0\26IEC http://www.iec.ch\0\0\0\0\0\0\0"
        "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"
        "\0\0\0\0\0\0desc\0\0\0\0\0\0\0.IEC 61966-2.1 Default RGB colour sp"
        "ace - sRGB\0\0\0\0\0\0\0\0\0\0\0.IEC 61966-2.1 Default RGB colour "
        "space - sRGB\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0sig \0\0\0"
        "\0CRT desc\0\0\0\0\0\0\0\rIEC61966-2.1\0\0\0\0\0\0\0\0\0\0\0\rIEC6"
        "1966-2.1\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"
        "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0view\0\0\0\0"
        "\0\23\244|\0\24_0\0\20\316\2\0\3\355\262\0\4\23\n\0\3\\g\0\0\0\1XY"
        "Z \0\0\0\0\0L\n=\0P\0\0\0W\36\270meas\0\0\0\0\0\0\0\1\0\0\0\0\0\0\0"
        "\0\0\0\0\0\0\0\0\0\0\0\2\217\0\0\0\2XYZ \0\0\0\0\0\0\363Q\0\1\0\0\0"
        "\1\26\314XYZ \0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0XYZ \0\0\0\0\0\0o\240"
        "\0\0008\365\0\0\3\220XYZ \0\0\0\0\0\0b\227\0\0\267\207\0\0\30\331X"
        "YZ \0\0\0\0\0\0$\237\0\0\17\204\0\0\266\304curv\0\0\0\0\0\0\4\0\0\0"
        "\0\5\0\n\0\17\0\24\0\31\0\36\0#\0(\0-\0002\0007\0;\0@\0E\0J\0O\0T\0"
        "Y\0^\0c\0h\0m\0r\0w\0|\0\201\0\206\0\213\0\220\0\225\0\232\0\237\0"
        "\244\0\251\0\256\0\262\0\267\0\274\0\301\0\306\0\313\0\320\0\325\0"
        "\333\0\340\0\345\0\353\0\360\0\366\0\373\1\1\1\7\1\r\1\23\1\31\1\37"
        "\1%\1+\0012\0018\1>\1E\1L\1R\1Y\1`\1g\1n\1u\1|\1\203\1\213\1\222\1"
        "\232\1\241\1\251\1\261\1\271\1\301\1\311\1\321\1\331\1\341\1\351\1"
        "\362\1\372\2\3\2\14\2\24\2\35\2&\2/\0028\2A\2K\2T\2]\2g\2q\2z\2\204"
        "\2\216\2\230\2\242\2\254\2\266\2\301\2\313\2\325\2\340\2\353\2\365"
        "\3\0\3\13\3\26\3!\3-\0038\3C\3O\3Z\3f\3r\3~\3\212\3\226\3\242\3\256"
        "\3\272\3\307\3\323\3\340\3\354\3\371\4\6\4\23\4 \4-\4;\4H\4U\4c\4q"
        "\4~\4\214\4\232\4\250\4\266\4\304\4\323\4\341\4\360\4\376\5\r\5\34"
        "\5+\5:\5I\5X\5g\5w\5\206\5\226\5\246\5\265\5\305\5\325\5\345\5\366"
        "\6\6\6\26\6'\0067\6H\6Y\6j\6{\6\214\6\235\6\257\6\300\6\321\6\343\6"
        "\365\7\7\7\31\7+\7=\7O\7a\7t\7\206\7\231\7\254\7\277\7\322\7\345\7"
        "\370\10\13\10\37\0102\10F\10Z\10n\10\202\10\226\10\252\10\276\10\322"
        "\10\347\10\373\t\20\t%\t:\tO\td\ty\t\217\t\244\t\272\t\317\t\345\t"
        "\373\n\21\n'\n=\nT\nj\n\201\n\230\n\256\n\305\n\334\n\363\13\13\13"
        "\"\0139\13Q\13i\13\200\13\230\13\260\13\310\13\341\13\371\14\22\14"
        "*\14C\14\\\14u\14\216\14\247\14\300\14\331\14\363\r\r\r&\r@\rZ\rt\r"
        "\216\r\251\r\303\r\336\r\370\16\23\16.\16I\16d\16\177\16\233\16\266"
        "\16\322\16\356\17\t\17%\17A\17^\17z\17\226\17\263\17\317\17\354\20"
        "\t\20&\20C\20a\20~\20\233\20\271\20\327\20\365\21\23\0211\21O\21m\21"
        "\214\21\252\21\311\21\350\22\7\22&\22E\22d\22\204\22\243\22\303\22"
        "\343\23\3\23#\23C\23c\23\203\23\244\23\305\23\345\24\6\24'\24I\24j"
        "\24\213\24\255\24\316\24\360\25\22\0254\25V\25x\25\233\25\275\25\340"
        "\26\3\26&\26I\26l\26\217\26\262\26\326\26\372\27\35\27A\27e\27\211"
        "\27\256\27\322\27\367\30\33\30@\30e\30\212\30\257\30\325\30\372\31"
        " \31E\31k\31\221\31\267\31\335\32\4\32*\32Q\32w\32\236\32\305\32\354"
        "\33\24\33;\33c\33\212\33\262\33\332\34\2\34*\34R\34{\34\243\34\314"
        "\34\365\35\36\35G\35p\35\231\35\303\35\354\36\26\36@\36j\36\224\36"
        "\276\36\351\37\23\37>\37i\37\224\37\277\37\352 \25 A l \230 \304 \360"
        "!\34!H!u!\241!\316!\373\"'\"U\"\202\"\257\"\335#\n#8#f#\224#\302#\360"
        "$\37$M$|$\253$\332%\t%8%h%\227%\307%\367&'&W&\207&\267&\350'\30'I'"
        "z'\253'\334(\r(?(q(\242(\324)\6)8)k)\235)\320*\2*5*h*\233*\317+\2+"
        "6+i+\235+\321,\5,9,n,\242,\327-\14-A-v-\253-\341.\26.L.\202.\267.\356"
        "/$/Z/\221/\307/\376050l0\2440\3331\0221J1\2021\2721\3622*2c2\2332\324"
        "3\r3F3\1773\2703\3614+4e4\2364\3305\0235M5\2075\3025\375676r6\2566"
        "\3517$7`7\2347\3278\0248P8\2148\3109\0059B9\1779\2749\371:6:t:\262"
        ":\357;-;k;\252;\350<'<e<\244<\343=\"=a=\241=\340> >`>\240>\340?!?a"
        "?\242?\342@#@d@\246@\347A)AjA\254A\356B0BrB\265B\367C:C}C\300D\3DG"
        "D\212D\316E\22EUE\232E\336F\"FgF\253F\360G5G{G\300H\5HKH\221H\327I"
        "\35IcI\251I\360J7J}J\304K\14KSK\232K\342L*LrL\272M\2MJM\223M\334N%"
        "NnN\267O\0OIO\223O\335P'PqP\273Q\6QPQ\233Q\346R1R|R\307S\23S_S\252"
        "S\366TBT\217T\333U(UuU\302V\17V\\V\251V\367WDW\222W\340X/X}X\313Y\32"
        "YiY\270Z\7ZVZ\246Z\365[E[\225[\345\\5\\\206\\\326]']x]\311^\32^l^\275"
        "_\17_a_\263`\5`W`\252`\374aOa\242a\365bIb\234b\360cCc\227c\353d@d\224"
        "d\351e=e\222e\347f=f\222f\350g=g\223g\351h?h\226h\354iCi\232i\361j"
        "Hj\237j\367kOk\247k\377lWl\257m\10m`m\271n\22nkn\304o\36oxo\321p+p"
        "\206p\340q:q\225q\360rKr\246s\1s]s\270t\24tpt\314u(u\205u\341v>v\233"
        "v\370wVw\263x\21xnx\314y*y\211y\347zFz\245{\4{c{\302|!|\201|\341}A"
        "}\241~\1~b~\302\177#\177\204\177\345\200G\200\250\201\n\201k\201\315"
        "\2020\202\222\202\364\203W\203\272\204\35\204\200\204\343\205G\205"
        "\253\206\16\206r\206\327\207;\207\237\210\4\210i\210\316\2113\211\231"
        "\211\376\212d\212\312\2130\213\226\213\374\214c\214\312\2151\215\230"
        "\215\377\216f\216\316\2176\217\236\220\6\220n\220\326\221?\221\250"
        "\222\21\222z\222\343\223M\223\266\224 \224\212\224\364\225_\225\311"
        "\2264\226\237\227\n\227u\227\340\230L\230\270\231$\231\220\231\374"
        "\232h\232\325\233B\233\257\234\34\234\211\234\367\235d\235\322\236"
        "@\236\256\237\35\237\213\237\372\240i\240\330\241G\241\266\242&\242"
        "\226\243\6\243v\243\346\244V\244\307\2458\245\251\246\32\246\213\246"
        "\375\247n\247\340\250R\250\304\2517\251\251\252\34\252\217\253\2\253"
        "u\253\351\254\\\254\320\255D\255\270\256-\256\241\257\26\257\213\260"
        "\0\260u\260\352\261`\261\326\262K\262\302\2638\263\256\264%\264\234"
        "\265\23\265\212\266\1\266y\266\360\267h\267\340\270Y\270\321\271J\271"
        "\302\272;\272\265\273.\273\247\274!\274\233\275\25\275\217\276\n\276"
        "\204\276\377\277z\277\365\300p\300\354\301g\301\343\302_\302\333\303"
        "X\303\324\304Q\304\316\305K\305\310\306F\306\303\307A\307\277\310="
        "\310\274\311:\311\271\3128\312\267\3136\313\266\3145\314\265\3155\315"
        "\265\3166\316\266\3177\317\270\3209\320\272\321<\321\276\322?\322\301"
        "\323D\323\306\324I\324\313\325N\325\321\326U\326\330\327\\\327\340"
        "\330d\330\350\331l\331\361\332v\332\373\333\200\334\5\334\212\335\20"
        "\335\226\336\34\336\242\337)\337\257\3406\340\275\341D\341\314\342"
        "S\342\333\343c\343\353\344s\344\374\345\204\346\r\346\226\347\37\347"
        "\251\3502\350\274\351F\351\320\352[\352\345\353p\353\373\354\206\355"
        "\21\355\234\356(\356\264\357@\357\314\360X\360\345\361r\361\377\362"
        "\214\363\31\363\247\3644\364\302\365P\365\336\366m\366\373\367\212"
        "\370\31\370\250\3718\371\307\372W\372\347\373w\374\7\374\230\375)\375"
        "\272\376K\376\334\377m\377\377";
    const size_t kProfileLength = 3212;
    static_assert(kProfileLength == sizeof(kProfile) - 1, "");
    return SkData::MakeWithoutCopy(kProfile, kProfileLength);
}

static sk_sp<SkPDFStream> make_srgb_color_profile() {
    sk_sp<SkPDFStream> stream = sk_make_sp<SkPDFStream>(SkSrgbIcm());
    stream->dict()->insertInt("N", 3);
    sk_sp<SkPDFArray> array = sk_make_sp<SkPDFArray>();
    array->appendScalar(0.0f);
    array->appendScalar(1.0f);
    array->appendScalar(0.0f);
    array->appendScalar(1.0f);
    array->appendScalar(0.0f);
    array->appendScalar(1.0f);
    stream->dict()->insertObject("Range", std::move(array));
    return stream;
}

static sk_sp<SkPDFArray> make_srgb_output_intents() {
    // sRGB is specified by HTML, CSS, and SVG.
    auto outputIntent = sk_make_sp<SkPDFDict>("OutputIntent");
    outputIntent->insertName("S", "GTS_PDFA1");
    outputIntent->insertString("RegistryName", "http://www.color.org");
    outputIntent->insertString("OutputConditionIdentifier",
                               "Custom");
    outputIntent->insertString("Info","sRGB IEC61966-2.1");
    outputIntent->insertObjRef("DestOutputProfile",
                               make_srgb_color_profile());
    auto intentArray = sk_make_sp<SkPDFArray>();
    intentArray->appendObject(std::move(outputIntent));
    return intentArray;
}

void SkPDFDocument::onClose(SkWStream* stream) {
    SkASSERT(!fCanvas.get());
    if (fPages.empty()) {
        this->reset();
        return;
    }
    auto docCatalog = sk_make_sp<SkPDFDict>("Catalog");
    if (fPDFA) {
        SkASSERT(fXMP);
        docCatalog->insertObjRef("Metadata", fXMP);
        // Don't specify OutputIntents if we are not in PDF/A mode since
        // no one has ever asked for this feature.
        docCatalog->insertObject("OutputIntents", make_srgb_output_intents());
    }
    SkASSERT(!fPages.empty());
    docCatalog->insertObjRef("Pages", generate_page_tree(&fPages));
    SkASSERT(fPages.empty());

    if (fDests->size() > 0) {
        docCatalog->insertObjRef("Dests", std::move(fDests));
    }

    // Build font subsetting info before calling addObjectRecursively().
    SkPDFCanon* canon = &fCanon;
    fFonts.foreach([canon](SkPDFFont* p){ p->getFontSubset(canon); });
    fObjectSerializer.addObjectRecursively(docCatalog);
    fObjectSerializer.serializeObjects(this->getStream());
    fObjectSerializer.serializeFooter(this->getStream(), docCatalog, fID);
    this->reset();
}

///////////////////////////////////////////////////////////////////////////////

sk_sp<SkDocument> SkPDFMakeDocument(SkWStream* stream,
                                    void (*proc)(SkWStream*, bool),
                                    SkScalar dpi,
                                    const SkDocument::PDFMetadata& metadata,
                                    sk_sp<SkPixelSerializer> jpeg,
                                    bool pdfa) {
    return stream ? sk_make_sp<SkPDFDocument>(stream, proc, dpi, metadata,
                                              std::move(jpeg), pdfa)
                  : nullptr;
}

sk_sp<SkDocument> SkDocument::MakePDF(const char path[], SkScalar dpi) {
    auto delete_wstream = [](SkWStream* stream, bool) { delete stream; };
    auto stream = skstd::make_unique<SkFILEWStream>(path);
    return stream->isValid()
                   ? SkPDFMakeDocument(stream.release(), delete_wstream, dpi,
                                       SkDocument::PDFMetadata(), nullptr,
                                       false)
                   : nullptr;
}

sk_sp<SkDocument> SkDocument::MakePDF(SkWStream* stream,
                                      SkScalar dpi,
                                      const SkDocument::PDFMetadata& metadata,
                                      sk_sp<SkPixelSerializer> jpegEncoder,
                                      bool pdfa) {
    return SkPDFMakeDocument(stream, nullptr, dpi, metadata,
                             std::move(jpegEncoder), pdfa);
}