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      1 /*
      2  * Copyright 2013 Google Inc.
      3  *
      4  * Use of this source code is governed by a BSD-style license that can be
      5  * found in the LICENSE file.
      6  */
      7 
      8 #include "Resources.h"
      9 #include "SkCanvas.h"
     10 #include "SkFixed.h"
     11 #include "SkFontDescriptor.h"
     12 #include "SkImage.h"
     13 #include "SkImageSource.h"
     14 #include "SkMallocPixelRef.h"
     15 #include "SkOSFile.h"
     16 #include "SkPictureRecorder.h"
     17 #include "SkTableColorFilter.h"
     18 #include "SkTemplates.h"
     19 #include "SkTypeface.h"
     20 #include "SkWriteBuffer.h"
     21 #include "SkValidatingReadBuffer.h"
     22 #include "SkXfermodeImageFilter.h"
     23 #include "Test.h"
     24 
     25 static const uint32_t kArraySize = 64;
     26 static const int kBitmapSize = 256;
     27 
     28 template<typename T>
     29 static void TestAlignment(T* testObj, skiatest::Reporter* reporter) {
     30     // Test memory read/write functions directly
     31     unsigned char dataWritten[1024];
     32     size_t bytesWrittenToMemory = testObj->writeToMemory(dataWritten);
     33     REPORTER_ASSERT(reporter, SkAlign4(bytesWrittenToMemory) == bytesWrittenToMemory);
     34     size_t bytesReadFromMemory = testObj->readFromMemory(dataWritten, bytesWrittenToMemory);
     35     REPORTER_ASSERT(reporter, SkAlign4(bytesReadFromMemory) == bytesReadFromMemory);
     36 }
     37 
     38 template<typename T> struct SerializationUtils {
     39     // Generic case for flattenables
     40     static void Write(SkWriteBuffer& writer, const T* flattenable) {
     41         writer.writeFlattenable(flattenable);
     42     }
     43     static void Read(SkValidatingReadBuffer& reader, T** flattenable) {
     44         *flattenable = (T*)reader.readFlattenable(T::GetFlattenableType());
     45     }
     46 };
     47 
     48 template<> struct SerializationUtils<SkMatrix> {
     49     static void Write(SkWriteBuffer& writer, const SkMatrix* matrix) {
     50         writer.writeMatrix(*matrix);
     51     }
     52     static void Read(SkValidatingReadBuffer& reader, SkMatrix* matrix) {
     53         reader.readMatrix(matrix);
     54     }
     55 };
     56 
     57 template<> struct SerializationUtils<SkPath> {
     58     static void Write(SkWriteBuffer& writer, const SkPath* path) {
     59         writer.writePath(*path);
     60     }
     61     static void Read(SkValidatingReadBuffer& reader, SkPath* path) {
     62         reader.readPath(path);
     63     }
     64 };
     65 
     66 template<> struct SerializationUtils<SkRegion> {
     67     static void Write(SkWriteBuffer& writer, const SkRegion* region) {
     68         writer.writeRegion(*region);
     69     }
     70     static void Read(SkValidatingReadBuffer& reader, SkRegion* region) {
     71         reader.readRegion(region);
     72     }
     73 };
     74 
     75 template<> struct SerializationUtils<SkString> {
     76     static void Write(SkWriteBuffer& writer, const SkString* string) {
     77         writer.writeString(string->c_str());
     78     }
     79     static void Read(SkValidatingReadBuffer& reader, SkString* string) {
     80         reader.readString(string);
     81     }
     82 };
     83 
     84 template<> struct SerializationUtils<unsigned char> {
     85     static void Write(SkWriteBuffer& writer, unsigned char* data, uint32_t arraySize) {
     86         writer.writeByteArray(data, arraySize);
     87     }
     88     static bool Read(SkValidatingReadBuffer& reader, unsigned char* data, uint32_t arraySize) {
     89         return reader.readByteArray(data, arraySize);
     90     }
     91 };
     92 
     93 template<> struct SerializationUtils<SkColor> {
     94     static void Write(SkWriteBuffer& writer, SkColor* data, uint32_t arraySize) {
     95         writer.writeColorArray(data, arraySize);
     96     }
     97     static bool Read(SkValidatingReadBuffer& reader, SkColor* data, uint32_t arraySize) {
     98         return reader.readColorArray(data, arraySize);
     99     }
    100 };
    101 
    102 template<> struct SerializationUtils<int32_t> {
    103     static void Write(SkWriteBuffer& writer, int32_t* data, uint32_t arraySize) {
    104         writer.writeIntArray(data, arraySize);
    105     }
    106     static bool Read(SkValidatingReadBuffer& reader, int32_t* data, uint32_t arraySize) {
    107         return reader.readIntArray(data, arraySize);
    108     }
    109 };
    110 
    111 template<> struct SerializationUtils<SkPoint> {
    112     static void Write(SkWriteBuffer& writer, SkPoint* data, uint32_t arraySize) {
    113         writer.writePointArray(data, arraySize);
    114     }
    115     static bool Read(SkValidatingReadBuffer& reader, SkPoint* data, uint32_t arraySize) {
    116         return reader.readPointArray(data, arraySize);
    117     }
    118 };
    119 
    120 template<> struct SerializationUtils<SkScalar> {
    121     static void Write(SkWriteBuffer& writer, SkScalar* data, uint32_t arraySize) {
    122         writer.writeScalarArray(data, arraySize);
    123     }
    124     static bool Read(SkValidatingReadBuffer& reader, SkScalar* data, uint32_t arraySize) {
    125         return reader.readScalarArray(data, arraySize);
    126     }
    127 };
    128 
    129 template<typename T, bool testInvalid> struct SerializationTestUtils {
    130     static void InvalidateData(unsigned char* data) {}
    131 };
    132 
    133 template<> struct SerializationTestUtils<SkString, true> {
    134     static void InvalidateData(unsigned char* data) {
    135         data[3] |= 0x80; // Reverse sign of 1st integer
    136     }
    137 };
    138 
    139 template<typename T, bool testInvalid>
    140 static void TestObjectSerializationNoAlign(T* testObj, skiatest::Reporter* reporter) {
    141     SkWriteBuffer writer(SkWriteBuffer::kValidation_Flag);
    142     SerializationUtils<T>::Write(writer, testObj);
    143     size_t bytesWritten = writer.bytesWritten();
    144     REPORTER_ASSERT(reporter, SkAlign4(bytesWritten) == bytesWritten);
    145 
    146     unsigned char dataWritten[1024];
    147     writer.writeToMemory(dataWritten);
    148 
    149     SerializationTestUtils<T, testInvalid>::InvalidateData(dataWritten);
    150 
    151     // Make sure this fails when it should (test with smaller size, but still multiple of 4)
    152     SkValidatingReadBuffer buffer(dataWritten, bytesWritten - 4);
    153     T obj;
    154     SerializationUtils<T>::Read(buffer, &obj);
    155     REPORTER_ASSERT(reporter, !buffer.isValid());
    156 
    157     // Make sure this succeeds when it should
    158     SkValidatingReadBuffer buffer2(dataWritten, bytesWritten);
    159     const unsigned char* peekBefore = static_cast<const unsigned char*>(buffer2.skip(0));
    160     T obj2;
    161     SerializationUtils<T>::Read(buffer2, &obj2);
    162     const unsigned char* peekAfter = static_cast<const unsigned char*>(buffer2.skip(0));
    163     // This should have succeeded, since there are enough bytes to read this
    164     REPORTER_ASSERT(reporter, buffer2.isValid() == !testInvalid);
    165     // Note: This following test should always succeed, regardless of whether the buffer is valid,
    166     // since if it is invalid, it will simply skip to the end, as if it had read the whole buffer.
    167     REPORTER_ASSERT(reporter, static_cast<size_t>(peekAfter - peekBefore) == bytesWritten);
    168 }
    169 
    170 template<typename T>
    171 static void TestObjectSerialization(T* testObj, skiatest::Reporter* reporter) {
    172     TestObjectSerializationNoAlign<T, false>(testObj, reporter);
    173     TestAlignment(testObj, reporter);
    174 }
    175 
    176 template<typename T>
    177 static T* TestFlattenableSerialization(T* testObj, bool shouldSucceed,
    178                                        skiatest::Reporter* reporter) {
    179     SkWriteBuffer writer(SkWriteBuffer::kValidation_Flag);
    180     SerializationUtils<T>::Write(writer, testObj);
    181     size_t bytesWritten = writer.bytesWritten();
    182     REPORTER_ASSERT(reporter, SkAlign4(bytesWritten) == bytesWritten);
    183 
    184     unsigned char dataWritten[4096];
    185     SkASSERT(bytesWritten <= sizeof(dataWritten));
    186     writer.writeToMemory(dataWritten);
    187 
    188     // Make sure this fails when it should (test with smaller size, but still multiple of 4)
    189     SkValidatingReadBuffer buffer(dataWritten, bytesWritten - 4);
    190     T* obj = nullptr;
    191     SerializationUtils<T>::Read(buffer, &obj);
    192     REPORTER_ASSERT(reporter, !buffer.isValid());
    193     REPORTER_ASSERT(reporter, nullptr == obj);
    194 
    195     // Make sure this succeeds when it should
    196     SkValidatingReadBuffer buffer2(dataWritten, bytesWritten);
    197     const unsigned char* peekBefore = static_cast<const unsigned char*>(buffer2.skip(0));
    198     T* obj2 = nullptr;
    199     SerializationUtils<T>::Read(buffer2, &obj2);
    200     const unsigned char* peekAfter = static_cast<const unsigned char*>(buffer2.skip(0));
    201     if (shouldSucceed) {
    202         // This should have succeeded, since there are enough bytes to read this
    203         REPORTER_ASSERT(reporter, buffer2.isValid());
    204         REPORTER_ASSERT(reporter, static_cast<size_t>(peekAfter - peekBefore) == bytesWritten);
    205         REPORTER_ASSERT(reporter, obj2);
    206     } else {
    207         // If the deserialization was supposed to fail, make sure it did
    208         REPORTER_ASSERT(reporter, !buffer.isValid());
    209         REPORTER_ASSERT(reporter, nullptr == obj2);
    210     }
    211 
    212     return obj2; // Return object to perform further validity tests on it
    213 }
    214 
    215 template<typename T>
    216 static void TestArraySerialization(T* data, skiatest::Reporter* reporter) {
    217     SkWriteBuffer writer(SkWriteBuffer::kValidation_Flag);
    218     SerializationUtils<T>::Write(writer, data, kArraySize);
    219     size_t bytesWritten = writer.bytesWritten();
    220     // This should write the length (in 4 bytes) and the array
    221     REPORTER_ASSERT(reporter, (4 + kArraySize * sizeof(T)) == bytesWritten);
    222 
    223     unsigned char dataWritten[1024];
    224     writer.writeToMemory(dataWritten);
    225 
    226     // Make sure this fails when it should
    227     SkValidatingReadBuffer buffer(dataWritten, bytesWritten);
    228     T dataRead[kArraySize];
    229     bool success = SerializationUtils<T>::Read(buffer, dataRead, kArraySize / 2);
    230     // This should have failed, since the provided size was too small
    231     REPORTER_ASSERT(reporter, !success);
    232 
    233     // Make sure this succeeds when it should
    234     SkValidatingReadBuffer buffer2(dataWritten, bytesWritten);
    235     success = SerializationUtils<T>::Read(buffer2, dataRead, kArraySize);
    236     // This should have succeeded, since there are enough bytes to read this
    237     REPORTER_ASSERT(reporter, success);
    238 }
    239 
    240 static void TestBitmapSerialization(const SkBitmap& validBitmap,
    241                                     const SkBitmap& invalidBitmap,
    242                                     bool shouldSucceed,
    243                                     skiatest::Reporter* reporter) {
    244     SkAutoTUnref<SkImage> validImage(SkImage::NewFromBitmap(validBitmap));
    245     SkAutoTUnref<SkImageFilter> validBitmapSource(SkImageSource::Create(validImage));
    246     SkAutoTUnref<SkImage> invalidImage(SkImage::NewFromBitmap(invalidBitmap));
    247     SkAutoTUnref<SkImageFilter> invalidBitmapSource(SkImageSource::Create(invalidImage));
    248     SkAutoTUnref<SkXfermode> mode(SkXfermode::Create(SkXfermode::kSrcOver_Mode));
    249     SkAutoTUnref<SkImageFilter> xfermodeImageFilter(
    250         SkXfermodeImageFilter::Create(mode, invalidBitmapSource, validBitmapSource));
    251 
    252     SkAutoTUnref<SkImageFilter> deserializedFilter(
    253         TestFlattenableSerialization<SkImageFilter>(
    254             xfermodeImageFilter, shouldSucceed, reporter));
    255 
    256     // Try to render a small bitmap using the invalid deserialized filter
    257     // to make sure we don't crash while trying to render it
    258     if (shouldSucceed) {
    259         SkBitmap bitmap;
    260         bitmap.allocN32Pixels(24, 24);
    261         SkCanvas canvas(bitmap);
    262         canvas.clear(0x00000000);
    263         SkPaint paint;
    264         paint.setImageFilter(deserializedFilter);
    265         canvas.clipRect(SkRect::MakeXYWH(0, 0, SkIntToScalar(24), SkIntToScalar(24)));
    266         canvas.drawBitmap(bitmap, 0, 0, &paint);
    267     }
    268 }
    269 
    270 static void TestXfermodeSerialization(skiatest::Reporter* reporter) {
    271     for (size_t i = 0; i <= SkXfermode::kLastMode; ++i) {
    272         if (i == SkXfermode::kSrcOver_Mode) {
    273             // skip SrcOver, as it is allowed to return nullptr from Create()
    274             continue;
    275         }
    276         SkAutoTUnref<SkXfermode> mode(SkXfermode::Create(static_cast<SkXfermode::Mode>(i)));
    277         REPORTER_ASSERT(reporter, mode.get());
    278         SkAutoTUnref<SkXfermode> copy(
    279             TestFlattenableSerialization<SkXfermode>(mode.get(), true, reporter));
    280     }
    281 }
    282 
    283 static void TestColorFilterSerialization(skiatest::Reporter* reporter) {
    284     uint8_t table[256];
    285     for (int i = 0; i < 256; ++i) {
    286         table[i] = (i * 41) % 256;
    287     }
    288     SkAutoTUnref<SkColorFilter> colorFilter(SkTableColorFilter::Create(table));
    289     SkAutoTUnref<SkColorFilter> copy(
    290         TestFlattenableSerialization<SkColorFilter>(colorFilter.get(), true, reporter));
    291 }
    292 
    293 static SkBitmap draw_picture(SkPicture& picture) {
    294      SkBitmap bitmap;
    295      bitmap.allocN32Pixels(SkScalarCeilToInt(picture.cullRect().width()),
    296                            SkScalarCeilToInt(picture.cullRect().height()));
    297      SkCanvas canvas(bitmap);
    298      picture.playback(&canvas);
    299      return bitmap;
    300 }
    301 
    302 static void compare_bitmaps(skiatest::Reporter* reporter,
    303                             const SkBitmap& b1, const SkBitmap& b2) {
    304     REPORTER_ASSERT(reporter, b1.width() == b2.width());
    305     REPORTER_ASSERT(reporter, b1.height() == b2.height());
    306     SkAutoLockPixels autoLockPixels1(b1);
    307     SkAutoLockPixels autoLockPixels2(b2);
    308 
    309     if ((b1.width() != b2.width()) ||
    310         (b1.height() != b2.height())) {
    311         return;
    312     }
    313 
    314     int pixelErrors = 0;
    315     for (int y = 0; y < b2.height(); ++y) {
    316         for (int x = 0; x < b2.width(); ++x) {
    317             if (b1.getColor(x, y) != b2.getColor(x, y))
    318                 ++pixelErrors;
    319         }
    320     }
    321     REPORTER_ASSERT(reporter, 0 == pixelErrors);
    322 }
    323 static void serialize_and_compare_typeface(SkTypeface* typeface, const char* text,
    324                                            skiatest::Reporter* reporter)
    325 {
    326     // Create a paint with the typeface.
    327     SkPaint paint;
    328     paint.setColor(SK_ColorGRAY);
    329     paint.setTextSize(SkIntToScalar(30));
    330     paint.setTypeface(typeface);
    331 
    332     // Paint some text.
    333     SkPictureRecorder recorder;
    334     SkIRect canvasRect = SkIRect::MakeWH(kBitmapSize, kBitmapSize);
    335     SkCanvas* canvas = recorder.beginRecording(SkIntToScalar(canvasRect.width()),
    336                                                SkIntToScalar(canvasRect.height()),
    337                                                nullptr, 0);
    338     canvas->drawColor(SK_ColorWHITE);
    339     canvas->drawText(text, 2, 24, 32, paint);
    340     SkAutoTUnref<SkPicture> picture(recorder.endRecording());
    341 
    342     // Serlialize picture and create its clone from stream.
    343     SkDynamicMemoryWStream stream;
    344     picture->serialize(&stream);
    345     SkAutoTDelete<SkStream> inputStream(stream.detachAsStream());
    346     SkAutoTUnref<SkPicture> loadedPicture(SkPicture::CreateFromStream(inputStream.get()));
    347 
    348     // Draw both original and clone picture and compare bitmaps -- they should be identical.
    349     SkBitmap origBitmap = draw_picture(*picture);
    350     SkBitmap destBitmap = draw_picture(*loadedPicture);
    351     compare_bitmaps(reporter, origBitmap, destBitmap);
    352 }
    353 
    354 static void TestPictureTypefaceSerialization(skiatest::Reporter* reporter) {
    355     {
    356         // Load typeface from file to test CreateFromFile with index.
    357         SkString filename = GetResourcePath("/fonts/test.ttc");
    358         SkAutoTUnref<SkTypeface> typeface(SkTypeface::CreateFromFile(filename.c_str(), 1));
    359         if (!typeface) {
    360             INFOF(reporter, "Could not run fontstream test because test.ttc not found.");
    361         } else {
    362             serialize_and_compare_typeface(typeface, "A!", reporter);
    363         }
    364     }
    365 
    366     {
    367         // Load typeface as stream to create with axis settings.
    368         SkAutoTDelete<SkStreamAsset> distortable(GetResourceAsStream("/fonts/Distortable.ttf"));
    369         if (!distortable) {
    370             INFOF(reporter, "Could not run fontstream test because Distortable.ttf not found.");
    371         } else {
    372             SkFixed axis = SK_FixedSqrt2;
    373             SkAutoTUnref<SkTypeface> typeface(SkTypeface::CreateFromFontData(
    374                 new SkFontData(distortable.detach(), 0, &axis, 1)));
    375             if (!typeface) {
    376                 INFOF(reporter, "Could not run fontstream test because Distortable.ttf not created.");
    377             } else {
    378                 serialize_and_compare_typeface(typeface, "abc", reporter);
    379             }
    380         }
    381     }
    382 }
    383 
    384 static void setup_bitmap_for_canvas(SkBitmap* bitmap) {
    385     bitmap->allocN32Pixels(kBitmapSize, kBitmapSize);
    386 }
    387 
    388 static void make_checkerboard_bitmap(SkBitmap& bitmap) {
    389     setup_bitmap_for_canvas(&bitmap);
    390 
    391     SkCanvas canvas(bitmap);
    392     canvas.clear(0x00000000);
    393     SkPaint darkPaint;
    394     darkPaint.setColor(0xFF804020);
    395     SkPaint lightPaint;
    396     lightPaint.setColor(0xFF244484);
    397     const int i = kBitmapSize / 8;
    398     const SkScalar f = SkIntToScalar(i);
    399     for (int y = 0; y < kBitmapSize; y += i) {
    400         for (int x = 0; x < kBitmapSize; x += i) {
    401             canvas.save();
    402             canvas.translate(SkIntToScalar(x), SkIntToScalar(y));
    403             canvas.drawRect(SkRect::MakeXYWH(0, 0, f, f), darkPaint);
    404             canvas.drawRect(SkRect::MakeXYWH(f, 0, f, f), lightPaint);
    405             canvas.drawRect(SkRect::MakeXYWH(0, f, f, f), lightPaint);
    406             canvas.drawRect(SkRect::MakeXYWH(f, f, f, f), darkPaint);
    407             canvas.restore();
    408         }
    409     }
    410 }
    411 
    412 static void draw_something(SkCanvas* canvas) {
    413     SkPaint paint;
    414     SkBitmap bitmap;
    415     make_checkerboard_bitmap(bitmap);
    416 
    417     canvas->save();
    418     canvas->scale(0.5f, 0.5f);
    419     canvas->drawBitmap(bitmap, 0, 0, nullptr);
    420     canvas->restore();
    421 
    422     paint.setAntiAlias(true);
    423 
    424     paint.setColor(SK_ColorRED);
    425     canvas->drawCircle(SkIntToScalar(kBitmapSize/2), SkIntToScalar(kBitmapSize/2), SkIntToScalar(kBitmapSize/3), paint);
    426     paint.setColor(SK_ColorBLACK);
    427     paint.setTextSize(SkIntToScalar(kBitmapSize/3));
    428     canvas->drawText("Picture", 7, SkIntToScalar(kBitmapSize/2), SkIntToScalar(kBitmapSize/4), paint);
    429 }
    430 
    431 DEF_TEST(Serialization, reporter) {
    432     // Test matrix serialization
    433     {
    434         SkMatrix matrix = SkMatrix::I();
    435         TestObjectSerialization(&matrix, reporter);
    436     }
    437 
    438     // Test path serialization
    439     {
    440         SkPath path;
    441         TestObjectSerialization(&path, reporter);
    442     }
    443 
    444     // Test region serialization
    445     {
    446         SkRegion region;
    447         TestObjectSerialization(&region, reporter);
    448     }
    449 
    450     // Test xfermode serialization
    451     {
    452         TestXfermodeSerialization(reporter);
    453     }
    454 
    455     // Test color filter serialization
    456     {
    457         TestColorFilterSerialization(reporter);
    458     }
    459 
    460     // Test string serialization
    461     {
    462         SkString string("string");
    463         TestObjectSerializationNoAlign<SkString, false>(&string, reporter);
    464         TestObjectSerializationNoAlign<SkString, true>(&string, reporter);
    465     }
    466 
    467     // Test rrect serialization
    468     {
    469         // SkRRect does not initialize anything.
    470         // An uninitialized SkRRect can be serialized,
    471         // but will branch on uninitialized data when deserialized.
    472         SkRRect rrect;
    473         SkRect rect = SkRect::MakeXYWH(1, 2, 20, 30);
    474         SkVector corners[4] = { {1, 2}, {2, 3}, {3,4}, {4,5} };
    475         rrect.setRectRadii(rect, corners);
    476         TestAlignment(&rrect, reporter);
    477     }
    478 
    479     // Test readByteArray
    480     {
    481         unsigned char data[kArraySize] = { 1, 2, 3 };
    482         TestArraySerialization(data, reporter);
    483     }
    484 
    485     // Test readColorArray
    486     {
    487         SkColor data[kArraySize] = { SK_ColorBLACK, SK_ColorWHITE, SK_ColorRED };
    488         TestArraySerialization(data, reporter);
    489     }
    490 
    491     // Test readIntArray
    492     {
    493         int32_t data[kArraySize] = { 1, 2, 4, 8 };
    494         TestArraySerialization(data, reporter);
    495     }
    496 
    497     // Test readPointArray
    498     {
    499         SkPoint data[kArraySize] = { {6, 7}, {42, 128} };
    500         TestArraySerialization(data, reporter);
    501     }
    502 
    503     // Test readScalarArray
    504     {
    505         SkScalar data[kArraySize] = { SK_Scalar1, SK_ScalarHalf, SK_ScalarMax };
    506         TestArraySerialization(data, reporter);
    507     }
    508 
    509     // Test invalid deserializations
    510     {
    511         SkImageInfo info = SkImageInfo::MakeN32Premul(kBitmapSize, kBitmapSize);
    512 
    513         SkBitmap validBitmap;
    514         validBitmap.setInfo(info);
    515 
    516         // Create a bitmap with a really large height
    517         SkBitmap invalidBitmap;
    518         invalidBitmap.setInfo(info.makeWH(info.width(), 1000000000));
    519 
    520         // The deserialization should succeed, and the rendering shouldn't crash,
    521         // even when the device fails to initialize, due to its size
    522         TestBitmapSerialization(validBitmap, invalidBitmap, true, reporter);
    523     }
    524 
    525     // Test simple SkPicture serialization
    526     {
    527         SkPictureRecorder recorder;
    528         draw_something(recorder.beginRecording(SkIntToScalar(kBitmapSize),
    529                                                SkIntToScalar(kBitmapSize),
    530                                                nullptr, 0));
    531         SkAutoTUnref<SkPicture> pict(recorder.endRecording());
    532 
    533         // Serialize picture
    534         SkWriteBuffer writer(SkWriteBuffer::kValidation_Flag);
    535         pict->flatten(writer);
    536         size_t size = writer.bytesWritten();
    537         SkAutoTMalloc<unsigned char> data(size);
    538         writer.writeToMemory(static_cast<void*>(data.get()));
    539 
    540         // Deserialize picture
    541         SkValidatingReadBuffer reader(static_cast<void*>(data.get()), size);
    542         SkAutoTUnref<SkPicture> readPict(
    543             SkPicture::CreateFromBuffer(reader));
    544         REPORTER_ASSERT(reporter, readPict.get());
    545     }
    546 
    547     TestPictureTypefaceSerialization(reporter);
    548 }
    549