ui/base/resource/resource_bundle_unittest.cc

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "ui/base/resource/resource_bundle.h"
   6
   7 #include "base/base_paths.h"
   8 #include "base/file_util.h"
   9 #include "base/files/file_path.h"
  10 #include "base/files/scoped_temp_dir.h"
  11 #include "base/logging.h"
  12 #include "base/memory/ref_counted_memory.h"
  13 #include "base/path_service.h"
  14 #include "base/strings/utf_string_conversions.h"
  15 #include "net/base/big_endian.h"
  16 #include "testing/gmock/include/gmock/gmock.h"
  17 #include "testing/gtest/include/gtest/gtest.h"
  18 #include "third_party/skia/include/core/SkBitmap.h"
  19 #include "ui/base/layout.h"
  20 #include "ui/base/resource/data_pack.h"
  21 #include "ui/gfx/codec/png_codec.h"
  22 #include "ui/gfx/image/image_skia.h"
  23
  24 #include "grit/ui_resources.h"
  25
  26 using ::testing::_;
  27 using ::testing::Between;
  28 using ::testing::Property;
  29 using ::testing::Return;
  30 using ::testing::ReturnArg;
  31
  32 namespace ui {
  33
  34 extern const char kSamplePakContents[];
  35 extern const size_t kSamplePakSize;
  36 extern const char kSamplePakContents2x[];
  37 extern const size_t kSamplePakSize2x;
  38 extern const char kEmptyPakContents[];
  39 extern const size_t kEmptyPakSize;
  40
  41 namespace {
  42
  43 const unsigned char kPngMagic[8] = { 0x89, 'P', 'N', 'G', 13, 10, 26, 10 };
  44 const size_t kPngChunkMetadataSize = 12;
  45 const unsigned char kPngIHDRChunkType[4] = { 'I', 'H', 'D', 'R' };
  46
  47 // Custom chunk that GRIT adds to PNG to indicate that it could not find a
  48 // bitmap at the requested scale factor and fell back to 1x.
  49 const unsigned char kPngScaleChunk[12] = { 0x00, 0x00, 0x00, 0x00,
  50                                            'c', 's', 'C', 'l',
  51                                            0xc1, 0x30, 0x60, 0x4d };
  52
  53 // Mock for the ResourceBundle::Delegate class.
  54 class MockResourceBundleDelegate : public ui::ResourceBundle::Delegate {
  55  public:
  56   MockResourceBundleDelegate() {
  57   }
  58   virtual ~MockResourceBundleDelegate() {
  59   }
  60
  61   MOCK_METHOD2(GetPathForResourcePack, base::FilePath(
  62       const base::FilePath& pack_path, ui::ScaleFactor scale_factor));
  63   MOCK_METHOD2(GetPathForLocalePack, base::FilePath(
  64       const base::FilePath& pack_path, const std::string& locale));
  65   MOCK_METHOD1(GetImageNamed, gfx::Image(int resource_id));
  66   MOCK_METHOD2(GetNativeImageNamed,
  67       gfx::Image(int resource_id,
  68                  ui::ResourceBundle::ImageRTL rtl));
  69   MOCK_METHOD2(LoadDataResourceBytes,
  70       base::RefCountedStaticMemory*(int resource_id,
  71                                     ui::ScaleFactor scale_factor));
  72   MOCK_METHOD2(GetRawDataResourceMock, base::StringPiece(
  73       int resource_id,
  74       ui::ScaleFactor scale_factor));
  75   virtual bool GetRawDataResource(int resource_id,
  76                                   ui::ScaleFactor scale_factor,
  77                                   base::StringPiece* value) OVERRIDE {
  78     *value = GetRawDataResourceMock(resource_id, scale_factor);
  79     return true;
  80   }
  81   MOCK_METHOD1(GetLocalizedStringMock, base::string16(int message_id));
  82   virtual bool GetLocalizedString(int message_id,
  83                                   base::string16* value) OVERRIDE {
  84     *value = GetLocalizedStringMock(message_id);
  85     return true;
  86   }
  87   MOCK_METHOD1(GetFontMock,
  88                gfx::Font*(ui::ResourceBundle::FontStyle style));
  89   virtual scoped_ptr<gfx::Font> GetFont(
  90       ui::ResourceBundle::FontStyle style) OVERRIDE {
  91     return scoped_ptr<gfx::Font>(GetFontMock(style));
  92   }
  93 };
  94
  95 // Returns |bitmap_data| with |custom_chunk| inserted after the IHDR chunk.
  96 void AddCustomChunk(const base::StringPiece& custom_chunk,
  97                     std::vector<unsigned char>* bitmap_data) {
  98   EXPECT_LT(arraysize(kPngMagic) + kPngChunkMetadataSize, bitmap_data->size());
  99   EXPECT_TRUE(std::equal(
 100       bitmap_data->begin(),
 101       bitmap_data->begin() + arraysize(kPngMagic),
 102       kPngMagic));
 103   std::vector<unsigned char>::iterator ihdr_start =
 104       bitmap_data->begin() + arraysize(kPngMagic);
 105   char ihdr_length_data[sizeof(uint32)];
 106   for (size_t i = 0; i < sizeof(uint32); ++i)
 107     ihdr_length_data[i] = *(ihdr_start + i);
 108   uint32 ihdr_chunk_length = 0;
 109   net::ReadBigEndian(reinterpret_cast<char*>(ihdr_length_data),
 110                      &ihdr_chunk_length);
 111   EXPECT_TRUE(std::equal(
 112       ihdr_start + sizeof(uint32),
 113       ihdr_start + sizeof(uint32) + sizeof(kPngIHDRChunkType),
 114       kPngIHDRChunkType));
 115
 116   bitmap_data->insert(ihdr_start + kPngChunkMetadataSize + ihdr_chunk_length,
 117                       custom_chunk.begin(), custom_chunk.end());
 118 }
 119
 120 // Creates datapack at |path| with a single bitmap at resource ID 3
 121 // which is |edge_size|x|edge_size| pixels.
 122 // If |custom_chunk| is non empty, adds it after the IHDR chunk
 123 // in the encoded bitmap data.
 124 void CreateDataPackWithSingleBitmap(const base::FilePath& path,
 125                                     int edge_size,
 126                                     const base::StringPiece& custom_chunk) {
 127   SkBitmap bitmap;
 128   bitmap.setConfig(SkBitmap::kARGB_8888_Config, edge_size, edge_size);
 129   bitmap.allocPixels();
 130   bitmap.eraseColor(SK_ColorWHITE);
 131   std::vector<unsigned char> bitmap_data;
 132   EXPECT_TRUE(gfx::PNGCodec::EncodeBGRASkBitmap(bitmap, false, &bitmap_data));
 133
 134   if (custom_chunk.size() > 0)
 135     AddCustomChunk(custom_chunk, &bitmap_data);
 136
 137   std::map<uint16, base::StringPiece> resources;
 138   resources[3u] = base::StringPiece(
 139       reinterpret_cast<const char*>(&bitmap_data[0]), bitmap_data.size());
 140   DataPack::WritePack(path, resources, ui::DataPack::BINARY);
 141 }
 142
 143 }  // namespace
 144
 145 class ResourceBundleTest : public testing::Test {
 146  public:
 147   ResourceBundleTest() : resource_bundle_(NULL) {
 148   }
 149
 150   virtual ~ResourceBundleTest() {
 151   }
 152
 153   // Overridden from testing::Test:
 154   virtual void TearDown() OVERRIDE {
 155     delete resource_bundle_;
 156   }
 157
 158   // Returns new ResoureBundle with the specified |delegate|. The
 159   // ResourceBundleTest class manages the lifetime of the returned
 160   // ResourceBundle.
 161   ResourceBundle* CreateResourceBundle(ResourceBundle::Delegate* delegate) {
 162     DCHECK(!resource_bundle_);
 163
 164     resource_bundle_ = new ResourceBundle(delegate);
 165     return resource_bundle_;
 166   }
 167
 168  protected:
 169   ResourceBundle* resource_bundle_;
 170
 171  private:
 172   DISALLOW_COPY_AND_ASSIGN(ResourceBundleTest);
 173 };
 174
 175 TEST_F(ResourceBundleTest, DelegateGetPathForResourcePack) {
 176   MockResourceBundleDelegate delegate;
 177   ResourceBundle* resource_bundle = CreateResourceBundle(&delegate);
 178
 179   base::FilePath pack_path(FILE_PATH_LITERAL("/path/to/test_path.pak"));
 180   ui::ScaleFactor pack_scale_factor = ui::SCALE_FACTOR_200P;
 181
 182   EXPECT_CALL(delegate,
 183       GetPathForResourcePack(
 184           Property(&base::FilePath::value, pack_path.value()),
 185           pack_scale_factor))
 186       .Times(1)
 187       .WillOnce(Return(pack_path));
 188
 189   resource_bundle->AddDataPackFromPath(pack_path, pack_scale_factor);
 190 }
 191
 192 #if defined(OS_LINUX)
 193 // Fails consistently on Linux: crbug.com/161902
 194 #define MAYBE_DelegateGetPathForLocalePack DISABLED_DelegateGetPathForLocalePack
 195 #else
 196 #define MAYBE_DelegateGetPathForLocalePack DelegateGetPathForLocalePack
 197 #endif
 198 TEST_F(ResourceBundleTest, MAYBE_DelegateGetPathForLocalePack) {
 199   MockResourceBundleDelegate delegate;
 200   ResourceBundle* resource_bundle = CreateResourceBundle(&delegate);
 201
 202   std::string locale = "en-US";
 203
 204   // Cancel the load.
 205   EXPECT_CALL(delegate, GetPathForLocalePack(_, locale))
 206       .Times(2)
 207       .WillRepeatedly(Return(base::FilePath()))
 208       .RetiresOnSaturation();
 209
 210   EXPECT_FALSE(resource_bundle->LocaleDataPakExists(locale));
 211   EXPECT_EQ("", resource_bundle->LoadLocaleResources(locale));
 212
 213   // Allow the load to proceed.
 214   EXPECT_CALL(delegate, GetPathForLocalePack(_, locale))
 215       .Times(2)
 216       .WillRepeatedly(ReturnArg<0>());
 217
 218   EXPECT_TRUE(resource_bundle->LocaleDataPakExists(locale));
 219   EXPECT_EQ(locale, resource_bundle->LoadLocaleResources(locale));
 220 }
 221
 222 TEST_F(ResourceBundleTest, DelegateGetImageNamed) {
 223   MockResourceBundleDelegate delegate;
 224   ResourceBundle* resource_bundle = CreateResourceBundle(&delegate);
 225
 226   gfx::Image empty_image = resource_bundle->GetEmptyImage();
 227   int resource_id = 5;
 228
 229   EXPECT_CALL(delegate, GetImageNamed(resource_id))
 230       .Times(1)
 231       .WillOnce(Return(empty_image));
 232
 233   gfx::Image result = resource_bundle->GetImageNamed(resource_id);
 234   EXPECT_EQ(empty_image.ToSkBitmap(), result.ToSkBitmap());
 235 }
 236
 237 TEST_F(ResourceBundleTest, DelegateGetNativeImageNamed) {
 238   MockResourceBundleDelegate delegate;
 239   ResourceBundle* resource_bundle = CreateResourceBundle(&delegate);
 240
 241   gfx::Image empty_image = resource_bundle->GetEmptyImage();
 242   int resource_id = 5;
 243
 244   // Some platforms delegate GetNativeImageNamed calls to GetImageNamed.
 245   EXPECT_CALL(delegate, GetImageNamed(resource_id))
 246       .Times(Between(0, 1))
 247       .WillOnce(Return(empty_image));
 248   EXPECT_CALL(delegate,
 249       GetNativeImageNamed(resource_id, ui::ResourceBundle::RTL_DISABLED))
 250       .Times(Between(0, 1))
 251       .WillOnce(Return(empty_image));
 252
 253   gfx::Image result = resource_bundle->GetNativeImageNamed(resource_id);
 254   EXPECT_EQ(empty_image.ToSkBitmap(), result.ToSkBitmap());
 255 }
 256
 257 TEST_F(ResourceBundleTest, DelegateLoadDataResourceBytes) {
 258   MockResourceBundleDelegate delegate;
 259   ResourceBundle* resource_bundle = CreateResourceBundle(&delegate);
 260
 261   // Create the data resource for testing purposes.
 262   unsigned char data[] = "My test data";
 263   scoped_refptr<base::RefCountedStaticMemory> static_memory(
 264       new base::RefCountedStaticMemory(data, sizeof(data)));
 265
 266   int resource_id = 5;
 267   ui::ScaleFactor scale_factor = ui::SCALE_FACTOR_NONE;
 268
 269   EXPECT_CALL(delegate, LoadDataResourceBytes(resource_id, scale_factor))
 270       .Times(1).WillOnce(Return(static_memory.get()));
 271
 272   scoped_refptr<base::RefCountedStaticMemory> result =
 273       resource_bundle->LoadDataResourceBytesForScale(resource_id, scale_factor);
 274   EXPECT_EQ(static_memory, result);
 275 }
 276
 277 TEST_F(ResourceBundleTest, DelegateGetRawDataResource) {
 278   MockResourceBundleDelegate delegate;
 279   ResourceBundle* resource_bundle = CreateResourceBundle(&delegate);
 280
 281   // Create the string piece for testing purposes.
 282   char data[] = "My test data";
 283   base::StringPiece string_piece(data);
 284
 285   int resource_id = 5;
 286
 287   EXPECT_CALL(delegate, GetRawDataResourceMock(
 288           resource_id, ui::SCALE_FACTOR_NONE))
 289       .Times(1)
 290       .WillOnce(Return(string_piece));
 291
 292   base::StringPiece result = resource_bundle->GetRawDataResource(
 293       resource_id);
 294   EXPECT_EQ(string_piece.data(), result.data());
 295 }
 296
 297 TEST_F(ResourceBundleTest, DelegateGetLocalizedString) {
 298   MockResourceBundleDelegate delegate;
 299   ResourceBundle* resource_bundle = CreateResourceBundle(&delegate);
 300
 301   base::string16 data = base::ASCIIToUTF16("My test data");
 302   int resource_id = 5;
 303
 304   EXPECT_CALL(delegate, GetLocalizedStringMock(resource_id))
 305       .Times(1)
 306       .WillOnce(Return(data));
 307
 308   base::string16 result = resource_bundle->GetLocalizedString(resource_id);
 309   EXPECT_EQ(data, result);
 310 }
 311
 312 #if defined(USE_OZONE) && !defined(USE_PANGO)
 313 #define MAYBE_DelegateGetFontList DISABLED_DelegateGetFontList
 314 #else
 315 #define MAYBE_DelegateGetFontList DelegateGetFontList
 316 #endif
 317
 318 TEST_F(ResourceBundleTest, MAYBE_DelegateGetFontList) {
 319   MockResourceBundleDelegate delegate;
 320   ResourceBundle* resource_bundle = CreateResourceBundle(&delegate);
 321
 322   // Should be called once for each font type. When we return NULL the default
 323   // font will be created.
 324   gfx::Font* test_font = NULL;
 325   EXPECT_CALL(delegate, GetFontMock(_))
 326       .Times(8)
 327       .WillRepeatedly(Return(test_font));
 328
 329   const gfx::FontList* font_list =
 330       &resource_bundle->GetFontList(ui::ResourceBundle::BaseFont);
 331   EXPECT_TRUE(font_list);
 332
 333   const gfx::Font* font =
 334       &resource_bundle->GetFont(ui::ResourceBundle::BaseFont);
 335   EXPECT_TRUE(font);
 336 }
 337
 338 TEST_F(ResourceBundleTest, LocaleDataPakExists) {
 339   ResourceBundle* resource_bundle = CreateResourceBundle(NULL);
 340
 341   // Check that ResourceBundle::LocaleDataPakExists returns the correct results.
 342   EXPECT_TRUE(resource_bundle->LocaleDataPakExists("en-US"));
 343   EXPECT_FALSE(resource_bundle->LocaleDataPakExists("not_a_real_locale"));
 344 }
 345
 346 class ResourceBundleImageTest : public ResourceBundleTest {
 347  public:
 348   ResourceBundleImageTest() {}
 349
 350   virtual ~ResourceBundleImageTest() {
 351   }
 352
 353   virtual void SetUp() OVERRIDE {
 354     // Create a temporary directory to write test resource bundles to.
 355     ASSERT_TRUE(dir_.CreateUniqueTempDir());
 356   }
 357
 358   // Returns resource bundle which uses an empty data pak for locale data.
 359   ui::ResourceBundle* CreateResourceBundleWithEmptyLocalePak() {
 360     // Write an empty data pak for locale data.
 361     const base::FilePath& locale_path = dir_path().Append(
 362         FILE_PATH_LITERAL("locale.pak"));
 363     EXPECT_EQ(file_util::WriteFile(locale_path, kEmptyPakContents,
 364                                    kEmptyPakSize),
 365               static_cast<int>(kEmptyPakSize));
 366
 367     ui::ResourceBundle* resource_bundle = CreateResourceBundle(NULL);
 368
 369     // Load the empty locale data pak.
 370     resource_bundle->LoadTestResources(base::FilePath(), locale_path);
 371     return resource_bundle;
 372   }
 373
 374   // Returns the path of temporary directory to write test data packs into.
 375   const base::FilePath& dir_path() { return dir_.path(); }
 376
 377  private:
 378   scoped_ptr<DataPack> locale_pack_;
 379   base::ScopedTempDir dir_;
 380
 381   DISALLOW_COPY_AND_ASSIGN(ResourceBundleImageTest);
 382 };
 383
 384 // Verify that we don't crash when trying to load a resource that is not found.
 385 // In some cases, we fail to mmap resources.pak, but try to keep going anyway.
 386 TEST_F(ResourceBundleImageTest, LoadDataResourceBytes) {
 387   base::FilePath data_path = dir_path().Append(FILE_PATH_LITERAL("sample.pak"));
 388
 389   // Dump contents into the pak files.
 390   ASSERT_EQ(file_util::WriteFile(data_path, kEmptyPakContents,
 391       kEmptyPakSize), static_cast<int>(kEmptyPakSize));
 392
 393   // Create a resource bundle from the file.
 394   ResourceBundle* resource_bundle = CreateResourceBundleWithEmptyLocalePak();
 395   resource_bundle->AddDataPackFromPath(data_path, SCALE_FACTOR_100P);
 396
 397   const int kUnfoundResourceId = 10000;
 398   EXPECT_EQ(NULL, resource_bundle->LoadDataResourceBytes(
 399       kUnfoundResourceId));
 400
 401   // Give a .pak file that doesn't exist so we will fail to load it.
 402   resource_bundle->AddDataPackFromPath(
 403       base::FilePath(FILE_PATH_LITERAL("non-existant-file.pak")),
 404       ui::SCALE_FACTOR_NONE);
 405   EXPECT_EQ(NULL, resource_bundle->LoadDataResourceBytes(
 406       kUnfoundResourceId));
 407 }
 408
 409 TEST_F(ResourceBundleImageTest, GetRawDataResource) {
 410   base::FilePath data_path = dir_path().Append(FILE_PATH_LITERAL("sample.pak"));
 411   base::FilePath data_2x_path =
 412       dir_path().Append(FILE_PATH_LITERAL("sample_2x.pak"));
 413
 414   // Dump contents into the pak files.
 415   ASSERT_EQ(file_util::WriteFile(data_path, kSamplePakContents,
 416       kSamplePakSize), static_cast<int>(kSamplePakSize));
 417   ASSERT_EQ(file_util::WriteFile(data_2x_path, kSamplePakContents2x,
 418       kSamplePakSize2x), static_cast<int>(kSamplePakSize2x));
 419
 420   // Load the regular and 2x pak files.
 421   ResourceBundle* resource_bundle = CreateResourceBundleWithEmptyLocalePak();
 422   resource_bundle->AddDataPackFromPath(data_path, SCALE_FACTOR_100P);
 423   resource_bundle->AddDataPackFromPath(data_2x_path, SCALE_FACTOR_200P);
 424
 425   // Resource ID 4 exists in both 1x and 2x paks, so we expect a different
 426   // result when requesting the 2x scale.
 427   EXPECT_EQ("this is id 4", resource_bundle->GetRawDataResourceForScale(4,
 428       SCALE_FACTOR_100P));
 429   EXPECT_EQ("this is id 4 2x", resource_bundle->GetRawDataResourceForScale(4,
 430       SCALE_FACTOR_200P));
 431
 432   // Resource ID 6 only exists in the 1x pak so we expect the same resource
 433   // for both scale factor requests.
 434   EXPECT_EQ("this is id 6", resource_bundle->GetRawDataResourceForScale(6,
 435       SCALE_FACTOR_100P));
 436   EXPECT_EQ("this is id 6", resource_bundle->GetRawDataResourceForScale(6,
 437       SCALE_FACTOR_200P));
 438 }
 439
 440 // Test requesting image reps at various scale factors from the image returned
 441 // via ResourceBundle::GetImageNamed().
 442 TEST_F(ResourceBundleImageTest, GetImageNamed) {
 443   std::vector<ScaleFactor> supported_factors;
 444   supported_factors.push_back(SCALE_FACTOR_100P);
 445   supported_factors.push_back(SCALE_FACTOR_200P);
 446   test::ScopedSetSupportedScaleFactors scoped_supported(supported_factors);
 447   base::FilePath data_1x_path = dir_path().AppendASCII("sample_1x.pak");
 448   base::FilePath data_2x_path = dir_path().AppendASCII("sample_2x.pak");
 449
 450   // Create the pak files.
 451   CreateDataPackWithSingleBitmap(data_1x_path, 10, base::StringPiece());
 452   CreateDataPackWithSingleBitmap(data_2x_path, 20, base::StringPiece());
 453
 454   // Load the regular and 2x pak files.
 455   ResourceBundle* resource_bundle = CreateResourceBundleWithEmptyLocalePak();
 456   resource_bundle->AddDataPackFromPath(data_1x_path, SCALE_FACTOR_100P);
 457   resource_bundle->AddDataPackFromPath(data_2x_path, SCALE_FACTOR_200P);
 458
 459   EXPECT_EQ(SCALE_FACTOR_200P, resource_bundle->GetMaxScaleFactor());
 460
 461   gfx::ImageSkia* image_skia = resource_bundle->GetImageSkiaNamed(3);
 462
 463 #if defined(OS_CHROMEOS)
 464   // ChromeOS loads highest scale factor first.
 465   EXPECT_EQ(ui::SCALE_FACTOR_200P,
 466             GetSupportedScaleFactor(image_skia->image_reps()[0].scale()));
 467 #else
 468   EXPECT_EQ(ui::SCALE_FACTOR_100P,
 469             GetSupportedScaleFactor(image_skia->image_reps()[0].scale()));
 470 #endif
 471
 472   // Resource ID 3 exists in both 1x and 2x paks. Image reps should be
 473   // available for both scale factors in |image_skia|.
 474   gfx::ImageSkiaRep image_rep =
 475       image_skia->GetRepresentation(GetImageScale(ui::SCALE_FACTOR_100P));
 476   EXPECT_EQ(ui::SCALE_FACTOR_100P, GetSupportedScaleFactor(image_rep.scale()));
 477   image_rep =
 478       image_skia->GetRepresentation(GetImageScale(ui::SCALE_FACTOR_200P));
 479   EXPECT_EQ(ui::SCALE_FACTOR_200P, GetSupportedScaleFactor(image_rep.scale()));
 480
 481   // The 1.4x pack was not loaded. Requesting the 1.4x resource should return
 482   // either the 1x or the 2x resource.
 483   image_rep = image_skia->GetRepresentation(
 484       ui::GetImageScale(ui::SCALE_FACTOR_140P));
 485   ui::ScaleFactor scale_factor = GetSupportedScaleFactor(image_rep.scale());
 486   EXPECT_TRUE(scale_factor == ui::SCALE_FACTOR_100P ||
 487               scale_factor == ui::SCALE_FACTOR_200P);
 488 }
 489
 490 // Test that GetImageNamed() behaves properly for images which GRIT has
 491 // annotated as having fallen back to 1x.
 492 TEST_F(ResourceBundleImageTest, GetImageNamedFallback1x) {
 493   std::vector<ScaleFactor> supported_factors;
 494   supported_factors.push_back(SCALE_FACTOR_100P);
 495   supported_factors.push_back(SCALE_FACTOR_200P);
 496   test::ScopedSetSupportedScaleFactors scoped_supported(supported_factors);
 497   base::FilePath data_path = dir_path().AppendASCII("sample.pak");
 498   base::FilePath data_2x_path = dir_path().AppendASCII("sample_2x.pak");
 499
 500   // Create the pak files.
 501   CreateDataPackWithSingleBitmap(data_path, 10, base::StringPiece());
 502   // 2x data pack bitmap has custom chunk to indicate that the 2x bitmap is not
 503   // available and that GRIT fell back to 1x.
 504   CreateDataPackWithSingleBitmap(data_2x_path, 10, base::StringPiece(
 505       reinterpret_cast<const char*>(kPngScaleChunk),
 506       arraysize(kPngScaleChunk)));
 507
 508   // Load the regular and 2x pak files.
 509   ResourceBundle* resource_bundle = CreateResourceBundleWithEmptyLocalePak();
 510   resource_bundle->AddDataPackFromPath(data_path, SCALE_FACTOR_100P);
 511   resource_bundle->AddDataPackFromPath(data_2x_path, SCALE_FACTOR_200P);
 512
 513   gfx::ImageSkia* image_skia = resource_bundle->GetImageSkiaNamed(3);
 514
 515   // The image rep for 2x should be available. It should be resized to the
 516   // proper 2x size.
 517   gfx::ImageSkiaRep image_rep =
 518     image_skia->GetRepresentation(GetImageScale(ui::SCALE_FACTOR_200P));
 519   EXPECT_EQ(ui::SCALE_FACTOR_200P, GetSupportedScaleFactor(image_rep.scale()));
 520   EXPECT_EQ(20, image_rep.pixel_width());
 521   EXPECT_EQ(20, image_rep.pixel_height());
 522 }
 523
 524 #if defined(OS_WIN)
 525 // Tests GetImageNamed() behaves properly when the size of a scaled image
 526 // requires rounding as a result of using a non-integer scale factor.
 527 // Scale factors of 140 and 1805 are Windows specific.
 528 TEST_F(ResourceBundleImageTest, GetImageNamedFallback1xRounding) {
 529   std::vector<ScaleFactor> supported_factors;
 530   supported_factors.push_back(SCALE_FACTOR_100P);
 531   supported_factors.push_back(SCALE_FACTOR_140P);
 532   supported_factors.push_back(SCALE_FACTOR_180P);
 533   test::ScopedSetSupportedScaleFactors scoped_supported(supported_factors);
 534
 535   base::FilePath data_path = dir_path().AppendASCII("sample.pak");
 536   base::FilePath data_140P_path = dir_path().AppendASCII("sample_140P.pak");
 537   base::FilePath data_180P_path = dir_path().AppendASCII("sample_180P.pak");
 538
 539   CreateDataPackWithSingleBitmap(data_path, 8, base::StringPiece());
 540   // Mark 140% and 180% images as requiring 1x fallback.
 541   CreateDataPackWithSingleBitmap(data_140P_path, 8, base::StringPiece(
 542     reinterpret_cast<const char*>(kPngScaleChunk),
 543     arraysize(kPngScaleChunk)));
 544   CreateDataPackWithSingleBitmap(data_180P_path, 8, base::StringPiece(
 545     reinterpret_cast<const char*>(kPngScaleChunk),
 546     arraysize(kPngScaleChunk)));
 547
 548   ResourceBundle* resource_bundle = CreateResourceBundleWithEmptyLocalePak();
 549   resource_bundle->AddDataPackFromPath(data_path, SCALE_FACTOR_100P);
 550   resource_bundle->AddDataPackFromPath(data_140P_path, SCALE_FACTOR_140P);
 551   resource_bundle->AddDataPackFromPath(data_180P_path, SCALE_FACTOR_180P);
 552
 553   // Non-integer dimensions should be rounded up.
 554   gfx::ImageSkia* image_skia = resource_bundle->GetImageSkiaNamed(3);
 555   gfx::ImageSkiaRep image_rep =
 556     image_skia->GetRepresentation(
 557       GetImageScale(ui::SCALE_FACTOR_140P));
 558   EXPECT_EQ(12, image_rep.pixel_width());
 559   image_rep = image_skia->GetRepresentation(
 560     GetImageScale(ui::SCALE_FACTOR_180P));
 561   EXPECT_EQ(15, image_rep.pixel_width());
 562 }
 563 #endif
 564
 565 #if defined(OS_IOS)
 566 // Fails on devices that have non-100P scaling. See crbug.com/298406
 567 #define MAYBE_FallbackToNone DISABLED_FallbackToNone
 568 #else
 569 #define MAYBE_FallbackToNone FallbackToNone
 570 #endif
 571 TEST_F(ResourceBundleImageTest, MAYBE_FallbackToNone) {
 572   base::FilePath data_default_path = dir_path().AppendASCII("sample.pak");
 573
 574   // Create the pak files.
 575   CreateDataPackWithSingleBitmap(data_default_path, 10, base::StringPiece());
 576
 577     // Load the regular pak files only.
 578   ResourceBundle* resource_bundle = CreateResourceBundleWithEmptyLocalePak();
 579   resource_bundle->AddDataPackFromPath(data_default_path, SCALE_FACTOR_NONE);
 580
 581   gfx::ImageSkia* image_skia = resource_bundle->GetImageSkiaNamed(3);
 582   EXPECT_EQ(1u, image_skia->image_reps().size());
 583   EXPECT_EQ(ui::SCALE_FACTOR_100P,
 584             GetSupportedScaleFactor(image_skia->image_reps()[0].scale()));
 585 }
 586
 587 }  // namespace ui