Consolidate all the copies of the OpenFixtureAsSkData testing helper function (flutter/engine#47491)

engine/src/flutter/impeller/aiks/aiks_unittests.cc

@@ -1349,21 +1349,6 @@ TEST_P(AiksTest, CanDrawAnOpenPathThatIsntARect) {
   ASSERT_TRUE(OpenPlaygroundHere(canvas.EndRecordingAsPicture()));
 }
 
-static sk_sp<SkData> OpenFixtureAsSkData(const char* fixture_name) {
-  auto mapping = flutter::testing::OpenFixtureAsMapping(fixture_name);
-  if (!mapping) {
-    return nullptr;
-  }
-  auto data = SkData::MakeWithProc(
-      mapping->GetMapping(), mapping->GetSize(),
-      [](const void* ptr, void* context) {
-        delete reinterpret_cast<fml::Mapping*>(context);
-      },
-      mapping.get());
-  mapping.release();
-  return data;
-}
-
 struct TextRenderOptions {
   Scalar font_size = 50;
   Scalar alpha = 1;
@@ -1385,7 +1370,7 @@ bool RenderTextInCanvasSkia(const std::shared_ptr<Context>& context,
                     Paint{.color = Color::Red().WithAlpha(0.25)});
 
   // Construct the text blob.
-  auto mapping = OpenFixtureAsSkData(font_fixture.c_str());
+  auto mapping = flutter::testing::OpenFixtureAsSkData(font_fixture.c_str());
   if (!mapping) {
     return false;
   }
@@ -1563,7 +1548,7 @@ TEST_P(AiksTest, CanRenderTextOutsideBoundaries) {
   canvas.Translate({200, 150});
 
   // Construct the text blob.
-  auto mapping = OpenFixtureAsSkData("wtf.otf");
+  auto mapping = flutter::testing::OpenFixtureAsSkData("wtf.otf");
   ASSERT_NE(mapping, nullptr);
 
   Scalar font_size = 80;
@@ -3372,7 +3357,7 @@ TEST_P(AiksTest, CanDrawPointsWithTextureMap) {
 // moved into DLDispatching. Path data requires the SkTextBlobs which are not
 // used in impeller::TextFrames.
 TEST_P(AiksTest, TextForegroundShaderWithTransform) {
-  auto mapping = OpenFixtureAsSkData("Roboto-Regular.ttf");
+  auto mapping = flutter::testing::OpenFixtureAsSkData("Roboto-Regular.ttf");
   ASSERT_NE(mapping, nullptr);
 
   Scalar font_size = 100;

engine/src/flutter/impeller/display_list/dl_playground.cc

@@ -52,24 +52,9 @@ bool DlPlayground::OpenPlaygroundHere(DisplayListPlaygroundCallback callback) {
       });
 }
 
-static sk_sp<SkData> OpenFixtureAsSkData(const char* fixture_name) {
-  auto mapping = flutter::testing::OpenFixtureAsMapping(fixture_name);
-  if (!mapping) {
-    return nullptr;
-  }
-  auto data = SkData::MakeWithProc(
-      mapping->GetMapping(), mapping->GetSize(),
-      [](const void* ptr, void* context) {
-        delete reinterpret_cast<fml::Mapping*>(context);
-      },
-      mapping.get());
-  mapping.release();
-  return data;
-}
-
 SkFont DlPlayground::CreateTestFontOfSize(SkScalar scalar) {
   static constexpr const char* kTestFontFixture = "Roboto-Regular.ttf";
-  auto mapping = OpenFixtureAsSkData(kTestFontFixture);
+  auto mapping = flutter::testing::OpenFixtureAsSkData(kTestFontFixture);
   FML_CHECK(mapping);
   return SkFont{SkTypeface::MakeFromData(mapping), scalar};
 }

engine/src/flutter/impeller/typographer/typographer_unittests.cc

@@ -86,26 +86,11 @@ TEST_P(TypographerTest, CanCreateGlyphAtlas) {
                   .has_value());
 }
 
-static sk_sp<SkData> OpenFixtureAsSkData(const char* fixture_name) {
-  auto mapping = flutter::testing::OpenFixtureAsMapping(fixture_name);
-  if (!mapping) {
-    return nullptr;
-  }
-  auto data = SkData::MakeWithProc(
-      mapping->GetMapping(), mapping->GetSize(),
-      [](const void* ptr, void* context) {
-        delete reinterpret_cast<fml::Mapping*>(context);
-      },
-      mapping.get());
-  mapping.release();
-  return data;
-}
-
 TEST_P(TypographerTest, LazyAtlasTracksColor) {
 #if FML_OS_MACOSX
-  auto mapping = OpenFixtureAsSkData("Apple Color Emoji.ttc");
+  auto mapping = flutter::testing::OpenFixtureAsSkData("Apple Color Emoji.ttc");
 #else
-  auto mapping = OpenFixtureAsSkData("NotoColorEmoji.ttf");
+  auto mapping = flutter::testing::OpenFixtureAsSkData("NotoColorEmoji.ttf");
 #endif
   ASSERT_TRUE(mapping);
   SkFont emoji_font(SkTypeface::MakeFromData(mapping), 50.0);

engine/src/flutter/lib/ui/painting/image_decoder_no_gl_unittests.cc

@@ -73,41 +73,11 @@ float DecodeBGR10(uint32_t x) {
   return (x * slope) + intercept;
 }
 
-sk_sp<SkData> OpenFixtureAsSkData(const char* name) {
-  auto fixtures_directory =
-      fml::OpenDirectory(GetFixturesPath(), false, fml::FilePermission::kRead);
-  if (!fixtures_directory.is_valid()) {
-    return nullptr;
-  }
-
-  auto fixture_mapping =
-      fml::FileMapping::CreateReadOnly(fixtures_directory, name);
-
-  if (!fixture_mapping) {
-    return nullptr;
-  }
-
-  SkData::ReleaseProc on_release = [](const void* ptr, void* context) -> void {
-    delete reinterpret_cast<fml::FileMapping*>(context);
-  };
-
-  auto data = SkData::MakeWithProc(fixture_mapping->GetMapping(),
-                                   fixture_mapping->GetSize(), on_release,
-                                   fixture_mapping.get());
-
-  if (!data) {
-    return nullptr;
-  }
-  // The data is now owned by Skia.
-  fixture_mapping.release();
-  return data;
-}
-
 TEST(ImageDecoderNoGLTest, ImpellerWideGamutDisplayP3) {
 #if defined(OS_FUCHSIA)
   GTEST_SKIP() << "Fuchsia can't load the test fixtures.";
 #endif
-  auto data = OpenFixtureAsSkData("DisplayP3Logo.png");
+  auto data = flutter::testing::OpenFixtureAsSkData("DisplayP3Logo.png");
   auto image = SkImages::DeferredFromEncodedData(data);
   ASSERT_TRUE(image != nullptr);
   ASSERT_EQ(SkISize::Make(100, 100), image->dimensions());
@@ -164,7 +134,7 @@ TEST(ImageDecoderNoGLTest, ImpellerWideGamutIndexedPng) {
 #if defined(OS_FUCHSIA)
   GTEST_SKIP() << "Fuchsia can't load the test fixtures.";
 #endif
-  auto data = OpenFixtureAsSkData("WideGamutIndexed.png");
+  auto data = flutter::testing::OpenFixtureAsSkData("WideGamutIndexed.png");
   auto image = SkImages::DeferredFromEncodedData(data);
   ASSERT_TRUE(image != nullptr);
   ASSERT_EQ(SkISize::Make(100, 100), image->dimensions());

engine/src/flutter/lib/ui/painting/image_decoder_no_gl_unittests.h

@@ -96,7 +96,6 @@ namespace testing {
 
 float HalfToFloat(uint16_t half);
 float DecodeBGR10(uint32_t x);
-sk_sp<SkData> OpenFixtureAsSkData(const char* name);
 
 }  // namespace testing
 }  // namespace flutter

engine/src/flutter/lib/ui/painting/image_decoder_unittests.cc

@@ -238,7 +238,7 @@ TEST_F(ImageDecoderFixtureTest, InvalidImageResultsError) {
                                       manager.GetWeakIOManager(),
                                       std::make_shared<fml::SyncSwitch>());
 
-    auto data = OpenFixtureAsSkData("ThisDoesNotExist.jpg");
+    auto data = flutter::testing::OpenFixtureAsSkData("ThisDoesNotExist.jpg");
     ASSERT_FALSE(data);
 
     fml::RefPtr<ImageDescriptor> image_descriptor =
@@ -279,7 +279,7 @@ TEST_F(ImageDecoderFixtureTest, ValidImageResultsInSuccess) {
         settings, runners, loop->GetTaskRunner(),
         io_manager->GetWeakIOManager(), std::make_shared<fml::SyncSwitch>());
 
-    auto data = OpenFixtureAsSkData("DashInNooglerHat.jpg");
+    auto data = flutter::testing::OpenFixtureAsSkData("DashInNooglerHat.jpg");
 
     ASSERT_TRUE(data);
     ASSERT_GE(data->size(), 0u);
@@ -398,7 +398,7 @@ TEST_F(ImageDecoderFixtureTest, ImpellerPixelConversion32F) {
 }
 
 TEST_F(ImageDecoderFixtureTest, ImpellerWideGamutDisplayP3Opaque) {
-  auto data = OpenFixtureAsSkData("DisplayP3Logo.jpg");
+  auto data = flutter::testing::OpenFixtureAsSkData("DisplayP3Logo.jpg");
   auto image = SkImages::DeferredFromEncodedData(data);
   ASSERT_TRUE(image != nullptr);
   ASSERT_EQ(SkISize::Make(100, 100), image->dimensions());
@@ -450,7 +450,7 @@ TEST_F(ImageDecoderFixtureTest, ImpellerWideGamutDisplayP3Opaque) {
 }
 
 TEST_F(ImageDecoderFixtureTest, ImpellerNonWideGamut) {
-  auto data = OpenFixtureAsSkData("Horizontal.jpg");
+  auto data = flutter::testing::OpenFixtureAsSkData("Horizontal.jpg");
   auto image = SkImages::DeferredFromEncodedData(data);
   ASSERT_TRUE(image != nullptr);
   ASSERT_EQ(SkISize::Make(600, 200), image->dimensions());
@@ -501,7 +501,7 @@ TEST_F(ImageDecoderFixtureTest, ExifDataIsRespectedOnDecode) {
         settings, runners, loop->GetTaskRunner(),
         io_manager->GetWeakIOManager(), std::make_shared<fml::SyncSwitch>());
 
-    auto data = OpenFixtureAsSkData("Horizontal.jpg");
+    auto data = flutter::testing::OpenFixtureAsSkData("Horizontal.jpg");
 
     ASSERT_TRUE(data);
     ASSERT_GE(data->size(), 0u);
@@ -562,7 +562,7 @@ TEST_F(ImageDecoderFixtureTest, CanDecodeWithoutAGPUContext) {
         settings, runners, loop->GetTaskRunner(),
         io_manager->GetWeakIOManager(), std::make_shared<fml::SyncSwitch>());
 
-    auto data = OpenFixtureAsSkData("DashInNooglerHat.jpg");
+    auto data = flutter::testing::OpenFixtureAsSkData("DashInNooglerHat.jpg");
 
     ASSERT_TRUE(data);
     ASSERT_GE(data->size(), 0u);
@@ -597,9 +597,10 @@ TEST_F(ImageDecoderFixtureTest, CanDecodeWithoutAGPUContext) {
 }
 
 TEST_F(ImageDecoderFixtureTest, CanDecodeWithResizes) {
-  const auto image_dimensions = SkImages::DeferredFromEncodedData(
-                                    OpenFixtureAsSkData("DashInNooglerHat.jpg"))
-                                    ->dimensions();
+  const auto image_dimensions =
+      SkImages::DeferredFromEncodedData(
+          flutter::testing::OpenFixtureAsSkData("DashInNooglerHat.jpg"))
+          ->dimensions();
 
   ASSERT_FALSE(image_dimensions.isEmpty());
 
@@ -635,7 +636,7 @@ TEST_F(ImageDecoderFixtureTest, CanDecodeWithResizes) {
                           uint32_t target_height) -> SkISize {
     SkISize final_size = SkISize::MakeEmpty();
     runners.GetUITaskRunner()->PostTask([&]() {
-      auto data = OpenFixtureAsSkData("DashInNooglerHat.jpg");
+      auto data = flutter::testing::OpenFixtureAsSkData("DashInNooglerHat.jpg");
 
       ASSERT_TRUE(data);
       ASSERT_GE(data->size(), 0u);
@@ -676,8 +677,9 @@ TEST_F(ImageDecoderFixtureTest, CanDecodeWithResizes) {
 // Flutter.
 TEST(ImageDecoderTest,
      VerifyCodecRepeatCountsForGifAndWebPAreConsistentWithLoopCounts) {
-  auto gif_mapping = OpenFixtureAsSkData("hello_loop_2.gif");
-  auto webp_mapping = OpenFixtureAsSkData("hello_loop_2.webp");
+  auto gif_mapping = flutter::testing::OpenFixtureAsSkData("hello_loop_2.gif");
+  auto webp_mapping =
+      flutter::testing::OpenFixtureAsSkData("hello_loop_2.webp");
 
   ASSERT_TRUE(gif_mapping);
   ASSERT_TRUE(webp_mapping);
@@ -696,7 +698,7 @@ TEST(ImageDecoderTest,
 }
 
 TEST(ImageDecoderTest, VerifySimpleDecoding) {
-  auto data = OpenFixtureAsSkData("Horizontal.jpg");
+  auto data = flutter::testing::OpenFixtureAsSkData("Horizontal.jpg");
   auto image = SkImages::DeferredFromEncodedData(data);
   ASSERT_TRUE(image != nullptr);
   ASSERT_EQ(600, image->width());
@@ -733,7 +735,7 @@ TEST(ImageDecoderTest, VerifySimpleDecoding) {
 }
 
 TEST(ImageDecoderTest, ImagesWithTransparencyArePremulAlpha) {
-  auto data = OpenFixtureAsSkData("heart_end.png");
+  auto data = flutter::testing::OpenFixtureAsSkData("heart_end.png");
   ASSERT_TRUE(data);
   ImageGeneratorRegistry registry;
   std::shared_ptr<ImageGenerator> generator =
@@ -751,7 +753,7 @@ TEST(ImageDecoderTest, ImagesWithTransparencyArePremulAlpha) {
 }
 
 TEST(ImageDecoderTest, VerifySubpixelDecodingPreservesExifOrientation) {
-  auto data = OpenFixtureAsSkData("Horizontal.jpg");
+  auto data = flutter::testing::OpenFixtureAsSkData("Horizontal.jpg");
 
   ImageGeneratorRegistry registry;
   std::shared_ptr<ImageGenerator> generator =
@@ -776,7 +778,7 @@ TEST(ImageDecoderTest, VerifySubpixelDecodingPreservesExifOrientation) {
         fml::tracing::TraceFlow(""));
   };
 
-  auto expected_data = OpenFixtureAsSkData("Horizontal.png");
+  auto expected_data = flutter::testing::OpenFixtureAsSkData("Horizontal.png");
   ASSERT_TRUE(expected_data != nullptr);
   ASSERT_FALSE(expected_data->isEmpty());
 
@@ -809,7 +811,7 @@ TEST_F(ImageDecoderFixtureTest,
   auto vm_ref = DartVMRef::Create(settings);
   auto vm_data = vm_ref.GetVMData();
 
-  auto gif_mapping = OpenFixtureAsSkData("hello_loop_2.gif");
+  auto gif_mapping = flutter::testing::OpenFixtureAsSkData("hello_loop_2.gif");
 
   ASSERT_TRUE(gif_mapping);
 
@@ -878,7 +880,7 @@ TEST_F(ImageDecoderFixtureTest, MultiFrameCodecDidAccessGpuDisabledSyncSwitch) {
   auto vm_ref = DartVMRef::Create(settings);
   auto vm_data = vm_ref.GetVMData();
 
-  auto gif_mapping = OpenFixtureAsSkData("hello_loop_2.gif");
+  auto gif_mapping = flutter::testing::OpenFixtureAsSkData("hello_loop_2.gif");
 
   ASSERT_TRUE(gif_mapping);
 
@@ -962,7 +964,7 @@ TEST_F(ImageDecoderFixtureTest,
   auto vm_ref = DartVMRef::Create(settings);
   auto vm_data = vm_ref.GetVMData();
 
-  auto gif_mapping = OpenFixtureAsSkData("hello_loop_2.gif");
+  auto gif_mapping = flutter::testing::OpenFixtureAsSkData("hello_loop_2.gif");
 
   ASSERT_TRUE(gif_mapping);
 

engine/src/flutter/shell/common/shell_io_manager_unittests.cc

@@ -16,36 +16,6 @@
 namespace flutter {
 namespace testing {
 
-static sk_sp<SkData> OpenFixtureAsSkData(const char* name) {
-  auto fixtures_directory =
-      fml::OpenDirectory(GetFixturesPath(), false, fml::FilePermission::kRead);
-  if (!fixtures_directory.is_valid()) {
-    return nullptr;
-  }
-
-  auto fixture_mapping =
-      fml::FileMapping::CreateReadOnly(fixtures_directory, name);
-
-  if (!fixture_mapping) {
-    return nullptr;
-  }
-
-  SkData::ReleaseProc on_release = [](const void* ptr, void* context) -> void {
-    delete reinterpret_cast<fml::FileMapping*>(context);
-  };
-
-  auto data = SkData::MakeWithProc(fixture_mapping->GetMapping(),
-                                   fixture_mapping->GetSize(), on_release,
-                                   fixture_mapping.get());
-
-  if (!data) {
-    return nullptr;
-  }
-  // The data is now owned by Skia.
-  fixture_mapping.release();
-  return data;
-}
-
 class ShellIOManagerTest : public FixtureTest {};
 
 // Regression test for https://github.com/flutter/engine/pull/32106.
@@ -54,7 +24,7 @@ TEST_F(ShellIOManagerTest,
   auto settings = CreateSettingsForFixture();
   auto vm_ref = DartVMRef::Create(settings);
   auto vm_data = vm_ref.GetVMData();
-  auto gif_mapping = OpenFixtureAsSkData("hello_loop_2.gif");
+  auto gif_mapping = flutter::testing::OpenFixtureAsSkData("hello_loop_2.gif");
   ASSERT_TRUE(gif_mapping);
 
   ImageGeneratorRegistry registry;

engine/src/flutter/testing/testing.cc

@@ -61,6 +61,21 @@ std::unique_ptr<fml::Mapping> OpenFixtureAsMapping(
   return fml::FileMapping::CreateReadOnly(OpenFixture(fixture_name));
 }
 
+sk_sp<SkData> OpenFixtureAsSkData(const std::string& fixture_name) {
+  auto mapping = flutter::testing::OpenFixtureAsMapping(fixture_name);
+  if (!mapping) {
+    return nullptr;
+  }
+  auto data = SkData::MakeWithProc(
+      mapping->GetMapping(), mapping->GetSize(),
+      [](const void* ptr, void* context) {
+        delete reinterpret_cast<fml::Mapping*>(context);
+      },
+      mapping.get());
+  mapping.release();
+  return data;
+}
+
 bool MemsetPatternSetOrCheck(uint8_t* buffer, size_t size, MemsetPatternOp op) {
   if (buffer == nullptr) {
     return false;

engine/src/flutter/testing/testing.h

@@ -12,6 +12,7 @@
 #include "flutter/fml/mapping.h"
 #include "flutter/testing/assertions.h"
 #include "gtest/gtest.h"
+#include "third_party/skia/include/core/SkData.h"
 
 namespace flutter {
 namespace testing {
@@ -73,6 +74,17 @@ fml::UniqueFD OpenFixture(const std::string& fixture_name);
 std::unique_ptr<fml::Mapping> OpenFixtureAsMapping(
     const std::string& fixture_name);
 
+//------------------------------------------------------------------------------
+/// @brief      Opens a fixture of the given file name and returns a Skia SkData
+///             holding its contents.
+///
+/// @param[in]  fixture_name  The fixture name
+///
+/// @return     An SkData, or null if the fixture does not exist or its contents
+///             cannot be mapped in.
+///
+sk_sp<SkData> OpenFixtureAsSkData(const std::string& fixture_name);
+
 //------------------------------------------------------------------------------
 /// @brief      Gets the name of the currently running test. This is useful in
 ///             generating logs or assets based on test name.