aboutsummaryrefslogtreecommitdiffhomepage
path: root/tests/PDFPrimitivesTest.cpp
blob: f15f06090d7b10787e32f9f6498290224abcf127 (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
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
/*
 * Copyright 2010 The Android Open Source Project
 *
 * Use of this source code is governed by a BSD-style license that can be
 * found in the LICENSE file.
 */

#include "SkBitmap.h"
#include "SkCanvas.h"
#include "SkData.h"
#include "SkFlate.h"
#include "SkImageEncoder.h"
#include "SkMatrix.h"
#include "SkPDFCatalog.h"
#include "SkPDFDevice.h"
#include "SkPDFStream.h"
#include "SkPDFTypes.h"
#include "SkReadBuffer.h"
#include "SkScalar.h"
#include "SkStream.h"
#include "SkTypes.h"
#include "Test.h"

class SkPDFTestDict : public SkPDFDict {
public:
  virtual void getResources(const SkTSet<SkPDFObject*>& knownResourceObjects,
                            SkTSet<SkPDFObject*>* newResourceObjects) {
        for (int i = 0; i < fResources.count(); i++) {
            newResourceObjects->add(fResources[i]);
            fResources[i]->ref();
        }
    }

    void addResource(SkPDFObject* object) {
        fResources.append(1, &object);
    }

private:
    SkTDArray<SkPDFObject*> fResources;
};

#define DUMMY_TEXT "DCT compessed stream."

static SkData* encode_to_dct_data(size_t* pixelRefOffset, const SkBitmap& bitmap) {
    *pixelRefOffset = 0;
    return SkData::NewWithProc(DUMMY_TEXT, sizeof(DUMMY_TEXT) - 1, NULL, NULL);
}

static bool stream_equals(const SkDynamicMemoryWStream& stream, size_t offset,
                          const void* buffer, size_t len) {
    SkAutoDataUnref data(stream.copyToData());
    if (offset + len > data->size()) {
        return false;
    }
    return memcmp(data->bytes() + offset, buffer, len) == 0;
}

static bool stream_contains(const SkDynamicMemoryWStream& stream,
                            const char* buffer) {
    SkAutoDataUnref data(stream.copyToData());
    size_t len = strlen(buffer);  // our buffer does not have EOSs.

    for (size_t offset = 0 ; offset < data->size() - len; offset++) {
        if (memcmp(data->bytes() + offset, buffer, len) == 0) {
            return true;
        }
    }

    return false;
}

static void emit_object(SkPDFObject* object,
                        SkWStream* stream,
                        SkPDFCatalog* catalog,
                        bool indirect) {
    SkPDFObject* realObject = catalog->getSubstituteObject(object);
    if (indirect) {
        catalog->emitObjectNumber(stream, realObject);
        stream->writeText(" obj\n");
        realObject->emitObject(stream, catalog);
        stream->writeText("\nendobj\n");
    } else {
        realObject->emitObject(stream, catalog);
    }
}

static size_t get_output_size(SkPDFObject* object,
                              SkPDFCatalog* catalog,
                              bool indirect) {
    SkDynamicMemoryWStream buffer;
    emit_object(object, &buffer, catalog, indirect);
    return buffer.getOffset();
}

static void CheckObjectOutput(skiatest::Reporter* reporter, SkPDFObject* obj,
                              const char* expectedData, size_t expectedSize,
                              bool indirect, bool compression) {
    SkPDFDocument::Flags docFlags = (SkPDFDocument::Flags) 0;
    if (!compression) {
        docFlags = SkTBitOr(docFlags, SkPDFDocument::kFavorSpeedOverSize_Flags);
    }
    SkPDFCatalog catalog(docFlags);
    size_t directSize = get_output_size(obj, &catalog, false);
    REPORTER_ASSERT(reporter, directSize == expectedSize);

    SkDynamicMemoryWStream buffer;
    emit_object(obj, &buffer, &catalog, false);
    REPORTER_ASSERT(reporter, directSize == buffer.getOffset());
    REPORTER_ASSERT(reporter, stream_equals(buffer, 0, expectedData,
                                            directSize));

    if (indirect) {
        // Indirect output.
        static char header[] = "1 0 obj\n";
        static size_t headerLen = strlen(header);
        static char footer[] = "\nendobj\n";
        static size_t footerLen = strlen(footer);

        catalog.addObject(obj, false);

        size_t indirectSize = get_output_size(obj, &catalog, true);
        REPORTER_ASSERT(reporter,
                        indirectSize == directSize + headerLen + footerLen);

        buffer.reset();
        emit_object(obj, &buffer, &catalog, true);
        REPORTER_ASSERT(reporter, indirectSize == buffer.getOffset());
        REPORTER_ASSERT(reporter, stream_equals(buffer, 0, header, headerLen));
        REPORTER_ASSERT(reporter, stream_equals(buffer, headerLen, expectedData,
                                                directSize));
        REPORTER_ASSERT(reporter, stream_equals(buffer, headerLen + directSize,
                                                footer, footerLen));
    }
}

static void SimpleCheckObjectOutput(skiatest::Reporter* reporter,
                                    SkPDFObject* obj,
                                    const char* expectedResult) {
    CheckObjectOutput(reporter, obj, expectedResult,
                      strlen(expectedResult), true, false);
}

static void TestPDFStream(skiatest::Reporter* reporter) {
    char streamBytes[] = "Test\nFoo\tBar";
    SkAutoTDelete<SkMemoryStream> streamData(new SkMemoryStream(
        streamBytes, strlen(streamBytes), true));
    SkAutoTUnref<SkPDFStream> stream(new SkPDFStream(streamData.get()));
    SimpleCheckObjectOutput(
        reporter, stream.get(),
        "<</Length 12\n>> stream\nTest\nFoo\tBar\nendstream");
    stream->insert("Attribute", new SkPDFInt(42))->unref();
    SimpleCheckObjectOutput(reporter, stream.get(),
                            "<</Length 12\n/Attribute 42\n>> stream\n"
                                "Test\nFoo\tBar\nendstream");

    if (SkFlate::HaveFlate()) {
        char streamBytes2[] = "This is a longer string, so that compression "
                              "can do something with it. With shorter strings, "
                              "the short circuit logic cuts in and we end up "
                              "with an uncompressed string.";
        SkAutoDataUnref streamData2(SkData::NewWithCopy(streamBytes2,
                                                        strlen(streamBytes2)));
        SkAutoTUnref<SkPDFStream> stream(new SkPDFStream(streamData2.get()));

        SkDynamicMemoryWStream compressedByteStream;
        SkFlate::Deflate(streamData2.get(), &compressedByteStream);
        SkAutoDataUnref compressedData(compressedByteStream.copyToData());

        // Check first without compression.
        SkDynamicMemoryWStream expectedResult1;
        expectedResult1.writeText("<</Length 167\n>> stream\n");
        expectedResult1.writeText(streamBytes2);
        expectedResult1.writeText("\nendstream");
        SkAutoDataUnref expectedResultData1(expectedResult1.copyToData());
        CheckObjectOutput(reporter, stream.get(),
                          (const char*) expectedResultData1->data(),
                          expectedResultData1->size(), true, false);

        // Then again with compression.
        SkDynamicMemoryWStream expectedResult2;
        expectedResult2.writeText("<</Filter /FlateDecode\n/Length 116\n"
                                 ">> stream\n");
        expectedResult2.write(compressedData->data(), compressedData->size());
        expectedResult2.writeText("\nendstream");
        SkAutoDataUnref expectedResultData2(expectedResult2.copyToData());
        CheckObjectOutput(reporter, stream.get(),
                          (const char*) expectedResultData2->data(),
                          expectedResultData2->size(), true, true);
    }
}

static void TestCatalog(skiatest::Reporter* reporter) {
    SkPDFCatalog catalog((SkPDFDocument::Flags)0);
    SkAutoTUnref<SkPDFInt> int1(new SkPDFInt(1));
    SkAutoTUnref<SkPDFInt> int2(new SkPDFInt(2));
    SkAutoTUnref<SkPDFInt> int3(new SkPDFInt(3));
    int1.get()->ref();
    SkAutoTUnref<SkPDFInt> int1Again(int1.get());

    catalog.addObject(int1.get(), false);
    catalog.addObject(int2.get(), false);
    catalog.addObject(int3.get(), false);

    REPORTER_ASSERT(reporter, catalog.getObjectNumberSize(int1.get()) == 3);
    REPORTER_ASSERT(reporter, catalog.getObjectNumberSize(int2.get()) == 3);
    REPORTER_ASSERT(reporter, catalog.getObjectNumberSize(int3.get()) == 3);

    SkDynamicMemoryWStream buffer;
    catalog.emitObjectNumber(&buffer, int1.get());
    catalog.emitObjectNumber(&buffer, int2.get());
    catalog.emitObjectNumber(&buffer, int3.get());
    catalog.emitObjectNumber(&buffer, int1Again.get());
    char expectedResult[] = "1 02 03 01 0";
    REPORTER_ASSERT(reporter, stream_equals(buffer, 0, expectedResult,
                                            strlen(expectedResult)));
}

static void TestObjectRef(skiatest::Reporter* reporter) {
    SkAutoTUnref<SkPDFInt> int1(new SkPDFInt(1));
    SkAutoTUnref<SkPDFInt> int2(new SkPDFInt(2));
    SkAutoTUnref<SkPDFObjRef> int2ref(new SkPDFObjRef(int2.get()));

    SkPDFCatalog catalog((SkPDFDocument::Flags)0);
    catalog.addObject(int1.get(), false);
    catalog.addObject(int2.get(), false);
    REPORTER_ASSERT(reporter, catalog.getObjectNumberSize(int1.get()) == 3);
    REPORTER_ASSERT(reporter, catalog.getObjectNumberSize(int2.get()) == 3);

    char expectedResult[] = "2 0 R";
    SkDynamicMemoryWStream buffer;
    int2ref->emitObject(&buffer, &catalog);
    REPORTER_ASSERT(reporter, buffer.getOffset() == strlen(expectedResult));
    REPORTER_ASSERT(reporter, stream_equals(buffer, 0, expectedResult,
                                            buffer.getOffset()));
}

static void TestSubstitute(skiatest::Reporter* reporter) {
    SkAutoTUnref<SkPDFTestDict> proxy(new SkPDFTestDict());
    SkAutoTUnref<SkPDFTestDict> stub(new SkPDFTestDict());
    SkAutoTUnref<SkPDFInt> int33(new SkPDFInt(33));
    SkAutoTUnref<SkPDFDict> stubResource(new SkPDFDict());
    SkAutoTUnref<SkPDFInt> int44(new SkPDFInt(44));

    stub->insert("Value", int33.get());
    stubResource->insert("InnerValue", int44.get());
    stub->addResource(stubResource.get());

    SkPDFCatalog catalog((SkPDFDocument::Flags)0);
    catalog.addObject(proxy.get(), false);
    catalog.setSubstitute(proxy.get(), stub.get());

    SkDynamicMemoryWStream buffer;
    emit_object(proxy, &buffer, &catalog, false);
    SkTSet<SkPDFObject*>* substituteResources =
            catalog.getSubstituteList(false);
    for (int i = 0; i < substituteResources->count(); ++i) {
        emit_object((*substituteResources)[i], &buffer, &catalog, true);
    }

    char objectResult[] = "2 0 obj\n<</Value 33\n>>\nendobj\n";
    catalog.setFileOffset(proxy.get(), 0);

    size_t outputSize = get_output_size(
            catalog.getSubstituteObject(proxy.get()), &catalog, true);
    REPORTER_ASSERT(reporter, outputSize == strlen(objectResult));

    char expectedResult[] =
        "<</Value 33\n>>1 0 obj\n<</InnerValue 44\n>>\nendobj\n";
    REPORTER_ASSERT(reporter, buffer.getOffset() == strlen(expectedResult));
    REPORTER_ASSERT(reporter, stream_equals(buffer, 0, expectedResult,
                                            buffer.getOffset()));
}

// Create a bitmap that would be very eficiently compressed in a ZIP.
static void setup_bitmap(SkBitmap* bitmap, int width, int height) {
    bitmap->allocN32Pixels(width, height);
    bitmap->eraseColor(SK_ColorWHITE);
}

static void TestImage(skiatest::Reporter* reporter, const SkBitmap& bitmap,
                      const char* expected, bool useDCTEncoder) {
    SkISize pageSize = SkISize::Make(bitmap.width(), bitmap.height());
    SkAutoTUnref<SkPDFDevice> dev(new SkPDFDevice(pageSize, pageSize, SkMatrix::I()));

    if (useDCTEncoder) {
        dev->setDCTEncoder(encode_to_dct_data);
    }

    SkCanvas c(dev);
    c.drawBitmap(bitmap, 0, 0, NULL);

    SkPDFDocument doc;
    doc.appendPage(dev);

    SkDynamicMemoryWStream stream;
    doc.emitPDF(&stream);

    REPORTER_ASSERT(reporter, stream_contains(stream, expected));
}

static void TestUncompressed(skiatest::Reporter* reporter) {
    SkBitmap bitmap;
    setup_bitmap(&bitmap, 1, 1);
    TestImage(reporter, bitmap,
              "/Subtype /Image\n"
              "/Width 1\n"
              "/Height 1\n"
              "/ColorSpace /DeviceRGB\n"
              "/BitsPerComponent 8\n"
              "/Length 3\n"
              ">> stream",
              true);
}

static void TestFlateDecode(skiatest::Reporter* reporter) {
    if (!SkFlate::HaveFlate()) {
        return;
    }
    SkBitmap bitmap;
    setup_bitmap(&bitmap, 10, 10);
    TestImage(reporter, bitmap,
              "/Subtype /Image\n"
              "/Width 10\n"
              "/Height 10\n"
              "/ColorSpace /DeviceRGB\n"
              "/BitsPerComponent 8\n"
              "/Filter /FlateDecode\n"
              "/Length 13\n"
              ">> stream",
              false);
}

static void TestDCTDecode(skiatest::Reporter* reporter) {
    SkBitmap bitmap;
    setup_bitmap(&bitmap, 32, 32);
    TestImage(reporter, bitmap,
              "/Subtype /Image\n"
              "/Width 32\n"
              "/Height 32\n"
              "/ColorSpace /DeviceRGB\n"
              "/BitsPerComponent 8\n"
              "/Filter /DCTDecode\n"
              "/ColorTransform 0\n"
              "/Length 21\n"
              ">> stream",
              true);
}

static void TestImages(skiatest::Reporter* reporter) {
    TestUncompressed(reporter);
    TestFlateDecode(reporter);
    TestDCTDecode(reporter);
}

// This test used to assert without the fix submitted for
// http://code.google.com/p/skia/issues/detail?id=1083.
// SKP files might have invalid glyph ids. This test ensures they are ignored,
// and there is no assert on input data in Debug mode.
static void test_issue1083() {
    SkISize pageSize = SkISize::Make(100, 100);
    SkAutoTUnref<SkPDFDevice> dev(new SkPDFDevice(pageSize, pageSize, SkMatrix::I()));

    SkCanvas c(dev);
    SkPaint paint;
    paint.setTextEncoding(SkPaint::kGlyphID_TextEncoding);

    uint16_t glyphID = 65000;
    c.drawText(&glyphID, 2, 0, 0, paint);

    SkPDFDocument doc;
    doc.appendPage(dev);

    SkDynamicMemoryWStream stream;
    doc.emitPDF(&stream);
}

DEF_TEST(PDFPrimitives, reporter) {
    SkAutoTUnref<SkPDFInt> int42(new SkPDFInt(42));
    SimpleCheckObjectOutput(reporter, int42.get(), "42");

    SkAutoTUnref<SkPDFScalar> realHalf(new SkPDFScalar(SK_ScalarHalf));
    SimpleCheckObjectOutput(reporter, realHalf.get(), "0.5");

    SkAutoTUnref<SkPDFScalar> bigScalar(new SkPDFScalar(110999.75f));
#if !defined(SK_ALLOW_LARGE_PDF_SCALARS)
    SimpleCheckObjectOutput(reporter, bigScalar.get(), "111000");
#else
    SimpleCheckObjectOutput(reporter, bigScalar.get(), "110999.75");

    SkAutoTUnref<SkPDFScalar> biggerScalar(new SkPDFScalar(50000000.1));
    SimpleCheckObjectOutput(reporter, biggerScalar.get(), "50000000");

    SkAutoTUnref<SkPDFScalar> smallestScalar(new SkPDFScalar(1.0/65536));
    SimpleCheckObjectOutput(reporter, smallestScalar.get(), "0.00001526");
#endif

    SkAutoTUnref<SkPDFString> stringSimple(
        new SkPDFString("test ) string ( foo"));
    SimpleCheckObjectOutput(reporter, stringSimple.get(),
                            "(test \\) string \\( foo)");
    SkAutoTUnref<SkPDFString> stringComplex(
        new SkPDFString("\ttest ) string ( foo"));
    SimpleCheckObjectOutput(reporter, stringComplex.get(),
                            "<0974657374202920737472696E67202820666F6F>");

    SkAutoTUnref<SkPDFName> name(new SkPDFName("Test name\twith#tab"));
    const char expectedResult[] = "/Test#20name#09with#23tab";
    CheckObjectOutput(reporter, name.get(), expectedResult,
                      strlen(expectedResult), false, false);

    SkAutoTUnref<SkPDFName> escapedName(new SkPDFName("A#/%()<>[]{}B"));
    const char escapedNameExpected[] = "/A#23#2F#25#28#29#3C#3E#5B#5D#7B#7DB";
    CheckObjectOutput(reporter, escapedName.get(), escapedNameExpected,
                      strlen(escapedNameExpected), false, false);

    // Test that we correctly handle characters with the high-bit set.
    const unsigned char highBitCString[] = {0xDE, 0xAD, 'b', 'e', 0xEF, 0};
    SkAutoTUnref<SkPDFName> highBitName(
        new SkPDFName((const char*)highBitCString));
    const char highBitExpectedResult[] = "/#DE#ADbe#EF";
    CheckObjectOutput(reporter, highBitName.get(), highBitExpectedResult,
                      strlen(highBitExpectedResult), false, false);

    SkAutoTUnref<SkPDFArray> array(new SkPDFArray);
    SimpleCheckObjectOutput(reporter, array.get(), "[]");
    array->append(int42.get());
    SimpleCheckObjectOutput(reporter, array.get(), "[42]");
    array->append(realHalf.get());
    SimpleCheckObjectOutput(reporter, array.get(), "[42 0.5]");
    SkAutoTUnref<SkPDFInt> int0(new SkPDFInt(0));
    array->append(int0.get());
    SimpleCheckObjectOutput(reporter, array.get(), "[42 0.5 0]");
    SkAutoTUnref<SkPDFInt> int1(new SkPDFInt(1));
    array->setAt(0, int1.get());
    SimpleCheckObjectOutput(reporter, array.get(), "[1 0.5 0]");

    SkAutoTUnref<SkPDFDict> dict(new SkPDFDict);
    SimpleCheckObjectOutput(reporter, dict.get(), "<<>>");
    SkAutoTUnref<SkPDFName> n1(new SkPDFName("n1"));
    dict->insert(n1.get(), int42.get());
    SimpleCheckObjectOutput(reporter, dict.get(), "<</n1 42\n>>");
    SkAutoTUnref<SkPDFName> n2(new SkPDFName("n2"));
    SkAutoTUnref<SkPDFName> n3(new SkPDFName("n3"));
    dict->insert(n2.get(), realHalf.get());
    dict->insert(n3.get(), array.get());
    SimpleCheckObjectOutput(reporter, dict.get(),
                            "<</n1 42\n/n2 0.5\n/n3 [1 0.5 0]\n>>");

    TestPDFStream(reporter);

    TestCatalog(reporter);

    TestObjectRef(reporter);

    TestSubstitute(reporter);

    test_issue1083();

    TestImages(reporter);
}

namespace {

class DummyImageFilter : public SkImageFilter {
public:
    DummyImageFilter(bool visited = false) : SkImageFilter(0, NULL), fVisited(visited) {}
    ~DummyImageFilter() SK_OVERRIDE {}
    virtual bool onFilterImage(Proxy*, const SkBitmap& src, const Context&,
                               SkBitmap* result, SkIPoint* offset) const {
        fVisited = true;
        offset->fX = offset->fY = 0;
        *result = src;
        return true;
    }
    SK_TO_STRING_OVERRIDE()
    SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(DummyImageFilter)
    bool visited() const { return fVisited; }

private:
    mutable bool fVisited;
};

SkFlattenable* DummyImageFilter::CreateProc(SkReadBuffer& buffer) {
    SK_IMAGEFILTER_UNFLATTEN_COMMON(common, 0);
    bool visited = buffer.readBool();
    return SkNEW_ARGS(DummyImageFilter, (visited));
}

#ifndef SK_IGNORE_TO_STRING
void DummyImageFilter::toString(SkString* str) const {
    str->appendf("DummyImageFilter: (");
    str->append(")");
}
#endif

};

// Check that PDF rendering of image filters successfully falls back to
// CPU rasterization.
DEF_TEST(PDFImageFilter, reporter) {
    SkISize pageSize = SkISize::Make(100, 100);
    SkAutoTUnref<SkPDFDevice> device(new SkPDFDevice(pageSize, pageSize, SkMatrix::I()));
    SkCanvas canvas(device.get());
    SkAutoTUnref<DummyImageFilter> filter(new DummyImageFilter());

    // Filter just created; should be unvisited.
    REPORTER_ASSERT(reporter, !filter->visited());
    SkPaint paint;
    paint.setImageFilter(filter.get());
    canvas.drawRect(SkRect::MakeWH(100, 100), paint);

    // Filter was used in rendering; should be visited.
    REPORTER_ASSERT(reporter, filter->visited());
}