src/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/big_endian.h"
   9 #include "base/files/file_path.h"
  10 #include "base/files/file_util.h"
  11 #include "base/files/scoped_temp_dir.h"
  12 #include "base/logging.h"
  13 #include "base/memory/ref_counted_memory.h"
  14 #include "base/strings/utf_string_conversions.h"
  15 #include "testing/gmock/include/gmock/gmock.h"
  16 #include "testing/gtest/include/gtest/gtest.h"
  17 #include "third_party/skia/include/core/SkBitmap.h"
  18 #include "ui/base/layout.h"
  19 #include "ui/base/resource/data_pack.h"
  20 #include "ui/gfx/codec/png_codec.h"
  21 #include "ui/gfx/image/image_skia.h"
  22 #include "ui/resources/grit/ui_resources.h"
  23
  24 #if defined(OS_WIN)
  25 #include "ui/gfx/win/dpi.h"
  26 #endif
  27
  28 using ::testing::_;
  29 using ::testing::Between;
  30 using ::testing::Property;
  31 using ::testing::Return;
  32 using ::testing::ReturnArg;
  33
  34 namespace ui {
  35
  36 extern const char kSamplePakContents[];
  37 extern const size_t kSamplePakSize;
  38 extern const char kSamplePakContents2x[];
  39 extern const size_t kSamplePakSize2x;
  40 extern const char kEmptyPakContents[];
  41 extern const size_t kEmptyPakSize;
  42
  43 namespace {
  44
  45 const unsigned char kPngMagic[8] = { 0x89, 'P', 'N', 'G', 13, 10, 26, 10 };
  46 const size_t kPngChunkMetadataSize = 12;
  47 const unsigned char kPngIHDRChunkType[4] = { 'I', 'H', 'D', 'R' };
  48
  49 // Custom chunk that GRIT adds to PNG to indicate that it could not find a
  50 // bitmap at the requested scale factor and fell back to 1x.
  51 const unsigned char kPngScaleChunk[12] = { 0x00, 0x00, 0x00, 0x00,
  52                                            'c', 's', 'C', 'l',
  53                                            0xc1, 0x30, 0x60, 0x4d };
  54
  55 // Mock for the ResourceBundle::Delegate class.
  56 class MockResourceBundleDelegate : public ui::ResourceBundle::Delegate {
  57  public:
  58   MockResourceBundleDelegate() {
  59   }
  60   virtual ~MockResourceBundleDelegate() {
  61   }
  62
  63   MOCK_METHOD2(GetPathForResourcePack, base::FilePath(
  64       const base::FilePath& pack_path, ui::ScaleFactor scale_factor));
  65   MOCK_METHOD2(GetPathForLocalePack, base::FilePath(
  66       const base::FilePath& pack_path, const std::string& locale));
  67   MOCK_METHOD1(GetImageNamed, gfx::Image(int resource_id));
  68   MOCK_METHOD2(GetNativeImageNamed,
  69       gfx::Image(int resource_id,
  70                  ui::ResourceBundle::ImageRTL rtl));
  71   MOCK_METHOD2(LoadDataResourceBytes,
  72       base::RefCountedStaticMemory*(int resource_id,
  73                                     ui::ScaleFactor scale_factor));
  74   MOCK_METHOD2(GetRawDataResourceMock, base::StringPiece(
  75       int resource_id,
  76       ui::ScaleFactor scale_factor));
  77   virtual bool GetRawDataResource(int resource_id,
  78                                   ui::ScaleFactor scale_factor,
  79                                   base::StringPiece* value) override {
  80     *value = GetRawDataResourceMock(resource_id, scale_factor);
  81     return true;
  82   }
  83   MOCK_METHOD1(GetLocalizedStringMock, base::string16(int message_id));
  84   virtual bool GetLocalizedString(int message_id,
  85                                   base::string16* value) override {
  86     *value = GetLocalizedStringMock(message_id);
  87     return true;
  88   }
  89   MOCK_METHOD1(GetFontMock,
  90                gfx::Font*(ui::ResourceBundle::FontStyle style));
  91   virtual scoped_ptr<gfx::Font> GetFont(
  92       ui::ResourceBundle::FontStyle style) override {
  93     return scoped_ptr<gfx::Font>(GetFontMock(style));
  94   }
  95 };
  96
  97 // Returns |bitmap_data| with |custom_chunk| inserted after the IHDR chunk.
  98 void AddCustomChunk(const base::StringPiece& custom_chunk,
  99                     std::vector<unsigned char>* bitmap_data) {
 100   EXPECT_LT(arraysize(kPngMagic) + kPngChunkMetadataSize, bitmap_data->size());
 101   EXPECT_TRUE(std::equal(
 102       bitmap_data->begin(),
 103       bitmap_data->begin() + arraysize(kPngMagic),
 104       kPngMagic));
 105   std::vector<unsigned char>::iterator ihdr_start =
 106       bitmap_data->begin() + arraysize(kPngMagic);
 107   char ihdr_length_data[sizeof(uint32)];
 108   for (size_t i = 0; i < sizeof(uint32); ++i)
 109     ihdr_length_data[i] = *(ihdr_start + i);
 110   uint32 ihdr_chunk_length = 0;
 111   base::ReadBigEndian(reinterpret_cast<char*>(ihdr_length_data),
 112                       &ihdr_chunk_length);
 113   EXPECT_TRUE(std::equal(
 114       ihdr_start + sizeof(uint32),
 115       ihdr_start + sizeof(uint32) + sizeof(kPngIHDRChunkType),
 116       kPngIHDRChunkType));
 117
 118   bitmap_data->insert(ihdr_start + kPngChunkMetadataSize + ihdr_chunk_length,
 119                       custom_chunk.begin(), custom_chunk.end());
 120 }
 121
 122 // Creates datapack at |path| with a single bitmap at resource ID 3
 123 // which is |edge_size|x|edge_size| pixels.
 124 // If |custom_chunk| is non empty, adds it after the IHDR chunk
 125 // in the encoded bitmap data.
 126 void CreateDataPackWithSingleBitmap(const base::FilePath& path,
 127                                     int edge_size,
 128                                     const base::StringPiece& custom_chunk) {
 129   SkBitmap bitmap;
 130   bitmap.allocN32Pixels(edge_size, edge_size);
 131   bitmap.eraseColor(SK_ColorWHITE);
 132   std::vector<unsigned char> bitmap_data;
 133   EXPECT_TRUE(gfx::PNGCodec::EncodeBGRASkBitmap(bitmap, false, &bitmap_data));
 134
 135   if (custom_chunk.size() > 0)
 136     AddCustomChunk(custom_chunk, &bitmap_data);
 137
 138   std::map<uint16, base::StringPiece> resources;
 139   resources[3u] = base::StringPiece(
 140       reinterpret_cast<const char*>(&bitmap_data[0]), bitmap_data.size());
 141   DataPack::WritePack(path, resources, ui::DataPack::BINARY);
 142 }
 143
 144 }  // namespace
 145
 146 class ResourceBundleTest : public testing::Test {
 147  public:
 148   ResourceBundleTest() : resource_bundle_(NULL) {
 149   }
 150
 151   ~ResourceBundleTest() override {}
 152
 153   // Overridden from testing::Test:
 154   void TearDown() override { delete resource_bundle_; }
 155
 156   // Returns new ResoureBundle with the specified |delegate|. The
 157   // ResourceBundleTest class manages the lifetime of the returned
 158   // ResourceBundle.
 159   ResourceBundle* CreateResourceBundle(ResourceBundle::Delegate* delegate) {
 160     DCHECK(!resource_bundle_);
 161
 162     resource_bundle_ = new ResourceBundle(delegate);
 163     return resource_bundle_;
 164   }
 165
 166  protected:
 167   ResourceBundle* resource_bundle_;
 168
 169  private:
 170   DISALLOW_COPY_AND_ASSIGN(ResourceBundleTest);
 171 };
 172
 173 TEST_F(ResourceBundleTest, DelegateGetPathForResourcePack) {
 174   MockResourceBundleDelegate delegate;
 175   ResourceBundle* resource_bundle = CreateResourceBundle(&delegate);
 176
 177   base::FilePath pack_path(FILE_PATH_LITERAL("/path/to/test_path.pak"));
 178   ui::ScaleFactor pack_scale_factor = ui::SCALE_FACTOR_200P;
 179
 180   EXPECT_CALL(delegate,
 181       GetPathForResourcePack(
 182           Property(&base::FilePath::value, pack_path.value()),
 183           pack_scale_factor))
 184       .Times(1)
 185       .WillOnce(Return(pack_path));
 186
 187   resource_bundle->AddDataPackFromPath(pack_path, pack_scale_factor);
 188 }
 189
 190 #if defined(OS_LINUX)
 191 // Fails consistently on Linux: crbug.com/161902
 192 #define MAYBE_DelegateGetPathForLocalePack DISABLED_DelegateGetPathForLocalePack
 193 #else
 194 #define MAYBE_DelegateGetPathForLocalePack DelegateGetPathForLocalePack
 195 #endif
 196 TEST_F(ResourceBundleTest, MAYBE_DelegateGetPathForLocalePack) {
 197   MockResourceBundleDelegate delegate;
 198   ResourceBundle* resource_bundle = CreateResourceBundle(&delegate);
 199
 200   std::string locale = "en-US";
 201
 202   // Cancel the load.
 203   EXPECT_CALL(delegate, GetPathForLocalePack(_, locale))
 204       .Times(2)
 205       .WillRepeatedly(Return(base::FilePath()))
 206       .RetiresOnSaturation();
 207
 208   EXPECT_FALSE(resource_bundle->LocaleDataPakExists(locale));
 209   EXPECT_EQ("", resource_bundle->LoadLocaleResources(locale));
 210
 211   // Allow the load to proceed.
 212   EXPECT_CALL(delegate, GetPathForLocalePack(_, locale))
 213       .Times(2)
 214       .WillRepeatedly(ReturnArg<0>());
 215
 216   EXPECT_TRUE(resource_bundle->LocaleDataPakExists(locale));
 217   EXPECT_EQ(locale, resource_bundle->LoadLocaleResources(locale));
 218 }
 219
 220 TEST_F(ResourceBundleTest, DelegateGetImageNamed) {
 221   MockResourceBundleDelegate delegate;
 222   ResourceBundle* resource_bundle = CreateResourceBundle(&delegate);
 223
 224   gfx::Image empty_image = resource_bundle->GetEmptyImage();
 225   int resource_id = 5;
 226
 227   EXPECT_CALL(delegate, GetImageNamed(resource_id))
 228       .Times(1)
 229       .WillOnce(Return(empty_image));
 230
 231   gfx::Image result = resource_bundle->GetImageNamed(resource_id);
 232   EXPECT_EQ(empty_image.ToSkBitmap(), result.ToSkBitmap());
 233 }
 234
 235 TEST_F(ResourceBundleTest, DelegateGetNativeImageNamed) {
 236   MockResourceBundleDelegate delegate;
 237   ResourceBundle* resource_bundle = CreateResourceBundle(&delegate);
 238
 239   gfx::Image empty_image = resource_bundle->GetEmptyImage();
 240   int resource_id = 5;
 241
 242   // Some platforms delegate GetNativeImageNamed calls to GetImageNamed.
 243   EXPECT_CALL(delegate, GetImageNamed(resource_id))
 244       .Times(Between(0, 1))
 245       .WillOnce(Return(empty_image));
 246   EXPECT_CALL(delegate,
 247       GetNativeImageNamed(resource_id, ui::ResourceBundle::RTL_DISABLED))
 248       .Times(Between(0, 1))
 249       .WillOnce(Return(empty_image));
 250
 251   gfx::Image result = resource_bundle->GetNativeImageNamed(resource_id);
 252   EXPECT_EQ(empty_image.ToSkBitmap(), result.ToSkBitmap());
 253 }
 254
 255 TEST_F(ResourceBundleTest, DelegateLoadDataResourceBytes) {
 256   MockResourceBundleDelegate delegate;
 257   ResourceBundle* resource_bundle = CreateResourceBundle(&delegate);
 258
 259   // Create the data resource for testing purposes.
 260   unsigned char data[] = "My test data";
 261   scoped_refptr<base::RefCountedStaticMemory> static_memory(
 262       new base::RefCountedStaticMemory(data, sizeof(data)));
 263
 264   int resource_id = 5;
 265   ui::ScaleFactor scale_factor = ui::SCALE_FACTOR_NONE;
 266
 267   EXPECT_CALL(delegate, LoadDataResourceBytes(resource_id, scale_factor))
 268       .Times(1).WillOnce(Return(static_memory.get()));
 269
 270   scoped_refptr<base::RefCountedStaticMemory> result =
 271       resource_bundle->LoadDataResourceBytesForScale(resource_id, scale_factor);
 272   EXPECT_EQ(static_memory, result);
 273 }
 274
 275 TEST_F(ResourceBundleTest, DelegateGetRawDataResource) {
 276   MockResourceBundleDelegate delegate;
 277   ResourceBundle* resource_bundle = CreateResourceBundle(&delegate);
 278
 279   // Create the string piece for testing purposes.
 280   char data[] = "My test data";
 281   base::StringPiece string_piece(data);
 282
 283   int resource_id = 5;
 284
 285   EXPECT_CALL(delegate, GetRawDataResourceMock(
 286           resource_id, ui::SCALE_FACTOR_NONE))
 287       .Times(1)
 288       .WillOnce(Return(string_piece));
 289
 290   base::StringPiece result = resource_bundle->GetRawDataResource(
 291       resource_id);
 292   EXPECT_EQ(string_piece.data(), result.data());
 293 }
 294
 295 TEST_F(ResourceBundleTest, DelegateGetLocalizedString) {
 296   MockResourceBundleDelegate delegate;
 297   ResourceBundle* resource_bundle = CreateResourceBundle(&delegate);
 298
 299   base::string16 data = base::ASCIIToUTF16("My test data");
 300   int resource_id = 5;
 301
 302   EXPECT_CALL(delegate, GetLocalizedStringMock(resource_id))
 303       .Times(1)
 304       .WillOnce(Return(data));
 305
 306   base::string16 result = resource_bundle->GetLocalizedString(resource_id);
 307   EXPECT_EQ(data, result);
 308 }
 309
 310 TEST_F(ResourceBundleTest, OverrideStringResource) {
 311   ResourceBundle* resource_bundle = CreateResourceBundle(NULL);
 312
 313   base::string16 data = base::ASCIIToUTF16("My test data");
 314   int resource_id = 5;
 315
 316   base::string16 result = resource_bundle->GetLocalizedString(resource_id);
 317   EXPECT_EQ(base::string16(), result);
 318
 319   resource_bundle->OverrideLocaleStringResource(resource_id, data);
 320
 321   result = resource_bundle->GetLocalizedString(resource_id);
 322   EXPECT_EQ(data, result);
 323 }
 324
 325 TEST_F(ResourceBundleTest, DelegateGetLocalizedStringWithOverride) {
 326   MockResourceBundleDelegate delegate;
 327   ResourceBundle* resource_bundle = CreateResourceBundle(&delegate);
 328
 329   base::string16 delegate_data = base::ASCIIToUTF16("My delegate data");
 330   int resource_id = 5;
 331
 332   EXPECT_CALL(delegate, GetLocalizedStringMock(resource_id)).Times(1).WillOnce(
 333       Return(delegate_data));
 334
 335   base::string16 override_data = base::ASCIIToUTF16("My override data");
 336
 337   base::string16 result = resource_bundle->GetLocalizedString(resource_id);
 338   EXPECT_EQ(delegate_data, result);
 339 }
 340
 341 #if (defined(USE_OZONE) && !defined(USE_PANGO)) || defined(OS_ANDROID)
 342 #define MAYBE_DelegateGetFontList DISABLED_DelegateGetFontList
 343 #else
 344 #define MAYBE_DelegateGetFontList DelegateGetFontList
 345 #endif
 346
 347 TEST_F(ResourceBundleTest, MAYBE_DelegateGetFontList) {
 348   MockResourceBundleDelegate delegate;
 349   ResourceBundle* resource_bundle = CreateResourceBundle(&delegate);
 350
 351   // Should be called once for each font type. When we return NULL the default
 352   // font will be created.
 353   gfx::Font* test_font = NULL;
 354   EXPECT_CALL(delegate, GetFontMock(_))
 355       .Times(8)
 356       .WillRepeatedly(Return(test_font));
 357
 358   const gfx::FontList* font_list =
 359       &resource_bundle->GetFontList(ui::ResourceBundle::BaseFont);
 360   EXPECT_TRUE(font_list);
 361
 362   const gfx::Font* font =
 363       &resource_bundle->GetFont(ui::ResourceBundle::BaseFont);
 364   EXPECT_TRUE(font);
 365 }
 366
 367 TEST_F(ResourceBundleTest, LocaleDataPakExists) {
 368   ResourceBundle* resource_bundle = CreateResourceBundle(NULL);
 369
 370   // Check that ResourceBundle::LocaleDataPakExists returns the correct results.
 371   EXPECT_TRUE(resource_bundle->LocaleDataPakExists("en-US"));
 372   EXPECT_FALSE(resource_bundle->LocaleDataPakExists("not_a_real_locale"));
 373 }
 374
 375 class ResourceBundleImageTest : public ResourceBundleTest {
 376  public:
 377   ResourceBundleImageTest() {}
 378
 379   ~ResourceBundleImageTest() override {}
 380
 381   void SetUp() override {
 382     // Create a temporary directory to write test resource bundles to.
 383     ASSERT_TRUE(dir_.CreateUniqueTempDir());
 384   }
 385
 386   // Returns resource bundle which uses an empty data pak for locale data.
 387   ui::ResourceBundle* CreateResourceBundleWithEmptyLocalePak() {
 388     // Write an empty data pak for locale data.
 389     const base::FilePath& locale_path = dir_path().Append(
 390         FILE_PATH_LITERAL("locale.pak"));
 391     EXPECT_EQ(base::WriteFile(locale_path, kEmptyPakContents, kEmptyPakSize),
 392               static_cast<int>(kEmptyPakSize));
 393
 394     ui::ResourceBundle* resource_bundle = CreateResourceBundle(NULL);
 395
 396     // Load the empty locale data pak.
 397     resource_bundle->LoadTestResources(base::FilePath(), locale_path);
 398     return resource_bundle;
 399   }
 400
 401   // Returns the path of temporary directory to write test data packs into.
 402   const base::FilePath& dir_path() { return dir_.path(); }
 403
 404  private:
 405   scoped_ptr<DataPack> locale_pack_;
 406   base::ScopedTempDir dir_;
 407
 408   DISALLOW_COPY_AND_ASSIGN(ResourceBundleImageTest);
 409 };
 410
 411 // Verify that we don't crash when trying to load a resource that is not found.
 412 // In some cases, we fail to mmap resources.pak, but try to keep going anyway.
 413 TEST_F(ResourceBundleImageTest, LoadDataResourceBytes) {
 414   base::FilePath data_path = dir_path().Append(FILE_PATH_LITERAL("sample.pak"));
 415
 416   // Dump contents into the pak files.
 417   ASSERT_EQ(base::WriteFile(data_path, kEmptyPakContents,
 418       kEmptyPakSize), static_cast<int>(kEmptyPakSize));
 419
 420   // Create a resource bundle from the file.
 421   ResourceBundle* resource_bundle = CreateResourceBundleWithEmptyLocalePak();
 422   resource_bundle->AddDataPackFromPath(data_path, SCALE_FACTOR_100P);
 423
 424   const int kUnfoundResourceId = 10000;
 425   EXPECT_EQ(NULL, resource_bundle->LoadDataResourceBytes(
 426       kUnfoundResourceId));
 427
 428   // Give a .pak file that doesn't exist so we will fail to load it.
 429   resource_bundle->AddDataPackFromPath(
 430       base::FilePath(FILE_PATH_LITERAL("non-existant-file.pak")),
 431       ui::SCALE_FACTOR_NONE);
 432   EXPECT_EQ(NULL, resource_bundle->LoadDataResourceBytes(
 433       kUnfoundResourceId));
 434 }
 435
 436 TEST_F(ResourceBundleImageTest, GetRawDataResource) {
 437   base::FilePath data_path = dir_path().Append(FILE_PATH_LITERAL("sample.pak"));
 438   base::FilePath data_2x_path =
 439       dir_path().Append(FILE_PATH_LITERAL("sample_2x.pak"));
 440
 441   // Dump contents into the pak files.
 442   ASSERT_EQ(base::WriteFile(data_path, kSamplePakContents,
 443       kSamplePakSize), static_cast<int>(kSamplePakSize));
 444   ASSERT_EQ(base::WriteFile(data_2x_path, kSamplePakContents2x,
 445       kSamplePakSize2x), static_cast<int>(kSamplePakSize2x));
 446
 447   // Load the regular and 2x pak files.
 448   ResourceBundle* resource_bundle = CreateResourceBundleWithEmptyLocalePak();
 449   resource_bundle->AddDataPackFromPath(data_path, SCALE_FACTOR_100P);
 450   resource_bundle->AddDataPackFromPath(data_2x_path, SCALE_FACTOR_200P);
 451
 452   // Resource ID 4 exists in both 1x and 2x paks, so we expect a different
 453   // result when requesting the 2x scale.
 454   EXPECT_EQ("this is id 4", resource_bundle->GetRawDataResourceForScale(4,
 455       SCALE_FACTOR_100P));
 456   EXPECT_EQ("this is id 4 2x", resource_bundle->GetRawDataResourceForScale(4,
 457       SCALE_FACTOR_200P));
 458
 459   // Resource ID 6 only exists in the 1x pak so we expect the same resource
 460   // for both scale factor requests.
 461   EXPECT_EQ("this is id 6", resource_bundle->GetRawDataResourceForScale(6,
 462       SCALE_FACTOR_100P));
 463   EXPECT_EQ("this is id 6", resource_bundle->GetRawDataResourceForScale(6,
 464       SCALE_FACTOR_200P));
 465 }
 466
 467 // Test requesting image reps at various scale factors from the image returned
 468 // via ResourceBundle::GetImageNamed().
 469 TEST_F(ResourceBundleImageTest, GetImageNamed) {
 470 #if defined(OS_WIN)
 471   gfx::InitDeviceScaleFactor(2.0);
 472 #endif
 473   std::vector<ScaleFactor> supported_factors;
 474   supported_factors.push_back(SCALE_FACTOR_100P);
 475   supported_factors.push_back(SCALE_FACTOR_200P);
 476   test::ScopedSetSupportedScaleFactors scoped_supported(supported_factors);
 477   base::FilePath data_1x_path = dir_path().AppendASCII("sample_1x.pak");
 478   base::FilePath data_2x_path = dir_path().AppendASCII("sample_2x.pak");
 479
 480   // Create the pak files.
 481   CreateDataPackWithSingleBitmap(data_1x_path, 10, base::StringPiece());
 482   CreateDataPackWithSingleBitmap(data_2x_path, 20, base::StringPiece());
 483
 484   // Load the regular and 2x pak files.
 485   ResourceBundle* resource_bundle = CreateResourceBundleWithEmptyLocalePak();
 486   resource_bundle->AddDataPackFromPath(data_1x_path, SCALE_FACTOR_100P);
 487   resource_bundle->AddDataPackFromPath(data_2x_path, SCALE_FACTOR_200P);
 488
 489   EXPECT_EQ(SCALE_FACTOR_200P, resource_bundle->GetMaxScaleFactor());
 490
 491   gfx::ImageSkia* image_skia = resource_bundle->GetImageSkiaNamed(3);
 492
 493 #if defined(OS_CHROMEOS) || defined(OS_WIN)
 494   // ChromeOS/Windows load highest scale factor first.
 495   EXPECT_EQ(ui::SCALE_FACTOR_200P,
 496             GetSupportedScaleFactor(image_skia->image_reps()[0].scale()));
 497 #else
 498   EXPECT_EQ(ui::SCALE_FACTOR_100P,
 499             GetSupportedScaleFactor(image_skia->image_reps()[0].scale()));
 500 #endif
 501
 502   // Resource ID 3 exists in both 1x and 2x paks. Image reps should be
 503   // available for both scale factors in |image_skia|.
 504   gfx::ImageSkiaRep image_rep =
 505       image_skia->GetRepresentation(
 506       GetScaleForScaleFactor(ui::SCALE_FACTOR_100P));
 507   EXPECT_EQ(ui::SCALE_FACTOR_100P, GetSupportedScaleFactor(image_rep.scale()));
 508   image_rep =
 509       image_skia->GetRepresentation(
 510       GetScaleForScaleFactor(ui::SCALE_FACTOR_200P));
 511   EXPECT_EQ(ui::SCALE_FACTOR_200P, GetSupportedScaleFactor(image_rep.scale()));
 512
 513   // The 1.4x pack was not loaded. Requesting the 1.4x resource should return
 514   // either the 1x or the 2x resource.
 515   image_rep = image_skia->GetRepresentation(
 516       ui::GetScaleForScaleFactor(ui::SCALE_FACTOR_140P));
 517   ui::ScaleFactor scale_factor = GetSupportedScaleFactor(image_rep.scale());
 518   EXPECT_TRUE(scale_factor == ui::SCALE_FACTOR_100P ||
 519               scale_factor == ui::SCALE_FACTOR_200P);
 520
 521   // ImageSkia scales image if the one for the requested scale factor is not
 522   // available.
 523   EXPECT_EQ(1.4f, image_skia->GetRepresentation(1.4f).scale());
 524 }
 525
 526 // Test that GetImageNamed() behaves properly for images which GRIT has
 527 // annotated as having fallen back to 1x.
 528 TEST_F(ResourceBundleImageTest, GetImageNamedFallback1x) {
 529   std::vector<ScaleFactor> supported_factors;
 530   supported_factors.push_back(SCALE_FACTOR_100P);
 531   supported_factors.push_back(SCALE_FACTOR_200P);
 532   test::ScopedSetSupportedScaleFactors scoped_supported(supported_factors);
 533   base::FilePath data_path = dir_path().AppendASCII("sample.pak");
 534   base::FilePath data_2x_path = dir_path().AppendASCII("sample_2x.pak");
 535
 536   // Create the pak files.
 537   CreateDataPackWithSingleBitmap(data_path, 10, base::StringPiece());
 538   // 2x data pack bitmap has custom chunk to indicate that the 2x bitmap is not
 539   // available and that GRIT fell back to 1x.
 540   CreateDataPackWithSingleBitmap(data_2x_path, 10, base::StringPiece(
 541       reinterpret_cast<const char*>(kPngScaleChunk),
 542       arraysize(kPngScaleChunk)));
 543
 544   // Load the regular and 2x pak files.
 545   ResourceBundle* resource_bundle = CreateResourceBundleWithEmptyLocalePak();
 546   resource_bundle->AddDataPackFromPath(data_path, SCALE_FACTOR_100P);
 547   resource_bundle->AddDataPackFromPath(data_2x_path, SCALE_FACTOR_200P);
 548
 549   gfx::ImageSkia* image_skia = resource_bundle->GetImageSkiaNamed(3);
 550
 551   // The image rep for 2x should be available. It should be resized to the
 552   // proper 2x size.
 553   gfx::ImageSkiaRep image_rep =
 554       image_skia->GetRepresentation(GetScaleForScaleFactor(
 555       ui::SCALE_FACTOR_200P));
 556   EXPECT_EQ(ui::SCALE_FACTOR_200P, GetSupportedScaleFactor(image_rep.scale()));
 557   EXPECT_EQ(20, image_rep.pixel_width());
 558   EXPECT_EQ(20, image_rep.pixel_height());
 559 }
 560
 561 #if defined(OS_WIN)
 562 // Tests GetImageNamed() behaves properly when the size of a scaled image
 563 // requires rounding as a result of using a non-integer scale factor.
 564 // Scale factors of 140 and 1805 are Windows specific.
 565 TEST_F(ResourceBundleImageTest, GetImageNamedFallback1xRounding) {
 566   std::vector<ScaleFactor> supported_factors;
 567   supported_factors.push_back(SCALE_FACTOR_100P);
 568   supported_factors.push_back(SCALE_FACTOR_140P);
 569   supported_factors.push_back(SCALE_FACTOR_180P);
 570   test::ScopedSetSupportedScaleFactors scoped_supported(supported_factors);
 571
 572   base::FilePath data_path = dir_path().AppendASCII("sample.pak");
 573   base::FilePath data_140P_path = dir_path().AppendASCII("sample_140P.pak");
 574   base::FilePath data_180P_path = dir_path().AppendASCII("sample_180P.pak");
 575
 576   CreateDataPackWithSingleBitmap(data_path, 8, base::StringPiece());
 577   // Mark 140% and 180% images as requiring 1x fallback.
 578   CreateDataPackWithSingleBitmap(data_140P_path, 8, base::StringPiece(
 579     reinterpret_cast<const char*>(kPngScaleChunk),
 580     arraysize(kPngScaleChunk)));
 581   CreateDataPackWithSingleBitmap(data_180P_path, 8, base::StringPiece(
 582     reinterpret_cast<const char*>(kPngScaleChunk),
 583     arraysize(kPngScaleChunk)));
 584
 585   ResourceBundle* resource_bundle = CreateResourceBundleWithEmptyLocalePak();
 586   resource_bundle->AddDataPackFromPath(data_path, SCALE_FACTOR_100P);
 587   resource_bundle->AddDataPackFromPath(data_140P_path, SCALE_FACTOR_140P);
 588   resource_bundle->AddDataPackFromPath(data_180P_path, SCALE_FACTOR_180P);
 589
 590   // Non-integer dimensions should be rounded up.
 591   gfx::ImageSkia* image_skia = resource_bundle->GetImageSkiaNamed(3);
 592   gfx::ImageSkiaRep image_rep =
 593     image_skia->GetRepresentation(
 594     GetScaleForScaleFactor(ui::SCALE_FACTOR_140P));
 595   EXPECT_EQ(12, image_rep.pixel_width());
 596   image_rep = image_skia->GetRepresentation(
 597     GetScaleForScaleFactor(ui::SCALE_FACTOR_180P));
 598   EXPECT_EQ(15, image_rep.pixel_width());
 599 }
 600 #endif
 601
 602 #if defined(OS_IOS)
 603 // Fails on devices that have non-100P scaling. See crbug.com/298406
 604 #define MAYBE_FallbackToNone DISABLED_FallbackToNone
 605 #else
 606 #define MAYBE_FallbackToNone FallbackToNone
 607 #endif
 608 TEST_F(ResourceBundleImageTest, MAYBE_FallbackToNone) {
 609   base::FilePath data_default_path = dir_path().AppendASCII("sample.pak");
 610
 611   // Create the pak files.
 612   CreateDataPackWithSingleBitmap(data_default_path, 10, base::StringPiece());
 613
 614     // Load the regular pak files only.
 615   ResourceBundle* resource_bundle = CreateResourceBundleWithEmptyLocalePak();
 616   resource_bundle->AddDataPackFromPath(data_default_path, SCALE_FACTOR_NONE);
 617
 618   gfx::ImageSkia* image_skia = resource_bundle->GetImageSkiaNamed(3);
 619   EXPECT_EQ(1u, image_skia->image_reps().size());
 620   EXPECT_TRUE(image_skia->image_reps()[0].unscaled());
 621   EXPECT_EQ(ui::SCALE_FACTOR_100P,
 622             GetSupportedScaleFactor(image_skia->image_reps()[0].scale()));
 623 }
 624
 625 }  // namespace ui