ui/gfx/font_render_params_linux_unittest.cc - chromium/src - Git at Google

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.

 #include "ui/gfx/font_render_params.h"

 #include "base/files/scoped_temp_dir.h"
 #include "base/logging.h"
 #include "base/macros.h"
 #include "build/build_config.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "ui/gfx/font.h"
 #include "ui/gfx/linux_font_delegate.h"
 #include "ui/gfx/test/fontconfig_util_linux.h"

 namespace gfx {

 namespace {

 // Implementation of LinuxFontDelegate that returns a canned FontRenderParams
 // struct. This is used to isolate tests from the system's local configuration.
 class TestFontDelegate : public LinuxFontDelegate {
  public:
   TestFontDelegate() {}
   ~TestFontDelegate() override {}

   void set_params(const FontRenderParams& params) { params_ = params; }

   FontRenderParams GetDefaultFontRenderParams() const override {
     return params_;
   }
   void GetDefaultFontDescription(
       std::string* family_out,
       int* size_pixels_out,
       int* style_out,
       FontRenderParams* params_out) const override {
     NOTIMPLEMENTED();
   }

  private:
   FontRenderParams params_;

   DISALLOW_COPY_AND_ASSIGN(TestFontDelegate);
 };

 }  // namespace

 class FontRenderParamsTest : public testing::Test {
  public:
   FontRenderParamsTest() {
     SetUpFontconfig();
     CHECK(temp_dir_.CreateUniqueTempDir());
     original_font_delegate_ = LinuxFontDelegate::instance();
     LinuxFontDelegate::SetInstance(&test_font_delegate_);
     ClearFontRenderParamsCacheForTest();
   }

   ~FontRenderParamsTest() override {
     LinuxFontDelegate::SetInstance(
         const_cast<LinuxFontDelegate*>(original_font_delegate_));
     TearDownFontconfig();
   }

  protected:
   base::ScopedTempDir temp_dir_;
   const LinuxFontDelegate* original_font_delegate_;
   TestFontDelegate test_font_delegate_;

  private:
   DISALLOW_COPY_AND_ASSIGN(FontRenderParamsTest);
 };

 TEST_F(FontRenderParamsTest, Default) {
   ASSERT_TRUE(LoadSystemFontIntoFontconfig("arial.ttf"));
   ASSERT_TRUE(LoadConfigDataIntoFontconfig(temp_dir_.path(),
       std::string(kFontconfigFileHeader) +
       // Specify the desired defaults via a font match rather than a pattern
       // match (since this is the style generally used in /etc/fonts/conf.d).
       kFontconfigMatchFontHeader +
       CreateFontconfigEditStanza("antialias", "bool", "true") +
       CreateFontconfigEditStanza("autohint", "bool", "true") +
       CreateFontconfigEditStanza("hinting", "bool", "true") +
       CreateFontconfigEditStanza("hintstyle", "const", "hintslight") +
       CreateFontconfigEditStanza("rgba", "const", "rgb") +
       kFontconfigMatchFooter +
       // Add a font match for Arial. Since it specifies a family, it shouldn't
       // take effect when querying default settings.
       kFontconfigMatchFontHeader +
       CreateFontconfigTestStanza("family", "eq", "string", "Arial") +
       CreateFontconfigEditStanza("antialias", "bool", "true") +
       CreateFontconfigEditStanza("autohint", "bool", "false") +
       CreateFontconfigEditStanza("hinting", "bool", "true") +
       CreateFontconfigEditStanza("hintstyle", "const", "hintfull") +
       CreateFontconfigEditStanza("rgba", "const", "none") +
       kFontconfigMatchFooter +
       // Add font matches for fonts between 10 and 20 points or pixels. Since
       // they specify sizes, they also should not affect the defaults.
       kFontconfigMatchFontHeader +
       CreateFontconfigTestStanza("size", "more_eq", "double", "10.0") +
       CreateFontconfigTestStanza("size", "less_eq", "double", "20.0") +
       CreateFontconfigEditStanza("antialias", "bool", "false") +
       kFontconfigMatchFooter +
       kFontconfigMatchFontHeader +
       CreateFontconfigTestStanza("pixel_size", "more_eq", "double", "10.0") +
       CreateFontconfigTestStanza("pixel_size", "less_eq", "double", "20.0") +
       CreateFontconfigEditStanza("antialias", "bool", "false") +
       kFontconfigMatchFooter +
       kFontconfigFileFooter));

   FontRenderParams params = GetFontRenderParams(
       FontRenderParamsQuery(), NULL);
   EXPECT_TRUE(params.antialiasing);
   EXPECT_TRUE(params.autohinter);
   EXPECT_TRUE(params.use_bitmaps);
   EXPECT_EQ(FontRenderParams::HINTING_SLIGHT, params.hinting);
   EXPECT_FALSE(params.subpixel_positioning);
   EXPECT_EQ(FontRenderParams::SUBPIXEL_RENDERING_RGB,
             params.subpixel_rendering);
 }

 TEST_F(FontRenderParamsTest, Size) {
   ASSERT_TRUE(LoadSystemFontIntoFontconfig("arial.ttf"));
   ASSERT_TRUE(LoadConfigDataIntoFontconfig(temp_dir_.path(),
       std::string(kFontconfigFileHeader) +
       kFontconfigMatchPatternHeader +
       CreateFontconfigEditStanza("antialias", "bool", "true") +
       CreateFontconfigEditStanza("hinting", "bool", "true") +
       CreateFontconfigEditStanza("hintstyle", "const", "hintfull") +
       CreateFontconfigEditStanza("rgba", "const", "none") +
       kFontconfigMatchFooter +
       kFontconfigMatchPatternHeader +
       CreateFontconfigTestStanza("pixelsize", "less_eq", "double", "10") +
       CreateFontconfigEditStanza("antialias", "bool", "false") +
       kFontconfigMatchFooter +
       kFontconfigMatchPatternHeader +
       CreateFontconfigTestStanza("size", "more_eq", "double", "20") +
       CreateFontconfigEditStanza("hintstyle", "const", "hintslight") +
       CreateFontconfigEditStanza("rgba", "const", "rgb") +
       kFontconfigMatchFooter +
       kFontconfigFileFooter));

   // The defaults should be used when the supplied size isn't matched by the
   // second or third blocks.
   FontRenderParamsQuery query;
   query.pixel_size = 12;
   FontRenderParams params = GetFontRenderParams(query, NULL);
   EXPECT_TRUE(params.antialiasing);
   EXPECT_EQ(FontRenderParams::HINTING_FULL, params.hinting);
   EXPECT_EQ(FontRenderParams::SUBPIXEL_RENDERING_NONE,
             params.subpixel_rendering);

   query.pixel_size = 10;
   params = GetFontRenderParams(query, NULL);
   EXPECT_FALSE(params.antialiasing);
   EXPECT_EQ(FontRenderParams::HINTING_FULL, params.hinting);
   EXPECT_EQ(FontRenderParams::SUBPIXEL_RENDERING_NONE,
             params.subpixel_rendering);

   query.pixel_size = 0;
   query.point_size = 20;
   params = GetFontRenderParams(query, NULL);
   EXPECT_TRUE(params.antialiasing);
   EXPECT_EQ(FontRenderParams::HINTING_SLIGHT, params.hinting);
   EXPECT_EQ(FontRenderParams::SUBPIXEL_RENDERING_RGB,
             params.subpixel_rendering);
 }

 TEST_F(FontRenderParamsTest, Style) {
   ASSERT_TRUE(LoadSystemFontIntoFontconfig("arial.ttf"));
   // Load a config that disables subpixel rendering for bold text and disables
   // hinting for italic text.
   ASSERT_TRUE(LoadConfigDataIntoFontconfig(temp_dir_.path(),
       std::string(kFontconfigFileHeader) +
       kFontconfigMatchPatternHeader +
       CreateFontconfigEditStanza("antialias", "bool", "true") +
       CreateFontconfigEditStanza("hinting", "bool", "true") +
       CreateFontconfigEditStanza("hintstyle", "const", "hintslight") +
       CreateFontconfigEditStanza("rgba", "const", "rgb") +
       kFontconfigMatchFooter +
       kFontconfigMatchPatternHeader +
       CreateFontconfigTestStanza("weight", "eq", "const", "bold") +
       CreateFontconfigEditStanza("rgba", "const", "none") +
       kFontconfigMatchFooter +
       kFontconfigMatchPatternHeader +
       CreateFontconfigTestStanza("slant", "eq", "const", "italic") +
       CreateFontconfigEditStanza("hinting", "bool", "false") +
       kFontconfigMatchFooter +
       kFontconfigFileFooter));

   FontRenderParamsQuery query;
   query.style = Font::NORMAL;
   FontRenderParams params = GetFontRenderParams(query, NULL);
   EXPECT_EQ(FontRenderParams::HINTING_SLIGHT, params.hinting);
   EXPECT_EQ(FontRenderParams::SUBPIXEL_RENDERING_RGB,
             params.subpixel_rendering);

   query.style = Font::BOLD;
   params = GetFontRenderParams(query, NULL);
   EXPECT_EQ(FontRenderParams::HINTING_SLIGHT, params.hinting);
   EXPECT_EQ(FontRenderParams::SUBPIXEL_RENDERING_NONE,
             params.subpixel_rendering);

   query.style = Font::ITALIC;
   params = GetFontRenderParams(query, NULL);
   EXPECT_EQ(FontRenderParams::HINTING_NONE, params.hinting);
   EXPECT_EQ(FontRenderParams::SUBPIXEL_RENDERING_RGB,
             params.subpixel_rendering);

   query.style = Font::BOLD | Font::ITALIC;
   params = GetFontRenderParams(query, NULL);
   EXPECT_EQ(FontRenderParams::HINTING_NONE, params.hinting);
   EXPECT_EQ(FontRenderParams::SUBPIXEL_RENDERING_NONE,
             params.subpixel_rendering);
 }

 TEST_F(FontRenderParamsTest, Scalable) {
   // Load a config that only enables antialiasing for scalable fonts.
   ASSERT_TRUE(LoadConfigDataIntoFontconfig(temp_dir_.path(),
       std::string(kFontconfigFileHeader) +
       kFontconfigMatchPatternHeader +
       CreateFontconfigEditStanza("antialias", "bool", "false") +
       kFontconfigMatchFooter +
       kFontconfigMatchPatternHeader +
       CreateFontconfigTestStanza("scalable", "eq", "bool", "true") +
       CreateFontconfigEditStanza("antialias", "bool", "true") +
       kFontconfigMatchFooter +
       kFontconfigFileFooter));

   // Check that we specifically ask how scalable fonts should be rendered.
   FontRenderParams params = GetFontRenderParams(
       FontRenderParamsQuery(), NULL);
   EXPECT_TRUE(params.antialiasing);
 }

 TEST_F(FontRenderParamsTest, UseBitmaps) {
   ASSERT_TRUE(LoadSystemFontIntoFontconfig("arial.ttf"));
   // Load a config that enables embedded bitmaps for fonts <= 10 pixels.
   ASSERT_TRUE(LoadConfigDataIntoFontconfig(temp_dir_.path(),
       std::string(kFontconfigFileHeader) +
       kFontconfigMatchPatternHeader +
       CreateFontconfigEditStanza("embeddedbitmap", "bool", "false") +
       kFontconfigMatchFooter +
       kFontconfigMatchPatternHeader +
       CreateFontconfigTestStanza("pixelsize", "less_eq", "double", "10") +
       CreateFontconfigEditStanza("embeddedbitmap", "bool", "true") +
       kFontconfigMatchFooter +
       kFontconfigFileFooter));

   FontRenderParamsQuery query;
   FontRenderParams params = GetFontRenderParams(query, NULL);
   EXPECT_FALSE(params.use_bitmaps);

   query.pixel_size = 5;
   params = GetFontRenderParams(query, NULL);
   EXPECT_TRUE(params.use_bitmaps);
 }

 TEST_F(FontRenderParamsTest, ForceFullHintingWhenAntialiasingIsDisabled) {
   // Load a config that disables antialiasing and hinting while requesting
   // subpixel rendering.
   ASSERT_TRUE(LoadConfigDataIntoFontconfig(temp_dir_.path(),
       std::string(kFontconfigFileHeader) +
       kFontconfigMatchPatternHeader +
       CreateFontconfigEditStanza("antialias", "bool", "false") +
       CreateFontconfigEditStanza("hinting", "bool", "false") +
       CreateFontconfigEditStanza("hintstyle", "const", "hintnone") +
       CreateFontconfigEditStanza("rgba", "const", "rgb") +
       kFontconfigMatchFooter +
       kFontconfigFileFooter));

   // Full hinting should be forced. See the comment in GetFontRenderParams() for
   // more information.
   FontRenderParams params = GetFontRenderParams(
       FontRenderParamsQuery(), NULL);
   EXPECT_FALSE(params.antialiasing);
   EXPECT_EQ(FontRenderParams::HINTING_FULL, params.hinting);
   EXPECT_EQ(FontRenderParams::SUBPIXEL_RENDERING_NONE,
             params.subpixel_rendering);
   EXPECT_FALSE(params.subpixel_positioning);
 }

 #if defined(OS_CHROMEOS)
 TEST_F(FontRenderParamsTest, ForceSubpixelPositioning) {
   {
     FontRenderParams params =
         GetFontRenderParams(FontRenderParamsQuery(), NULL);
     EXPECT_TRUE(params.antialiasing);
     EXPECT_FALSE(params.subpixel_positioning);
     SetFontRenderParamsDeviceScaleFactor(1.0f);
   }
   ClearFontRenderParamsCacheForTest();
   SetFontRenderParamsDeviceScaleFactor(1.25f);
   // Subpixel positioning should be forced.
   {
     FontRenderParams params =
         GetFontRenderParams(FontRenderParamsQuery(), NULL);
     EXPECT_TRUE(params.antialiasing);
     EXPECT_TRUE(params.subpixel_positioning);
     SetFontRenderParamsDeviceScaleFactor(1.0f);
   }
 }
 #endif

 TEST_F(FontRenderParamsTest, OnlySetConfiguredValues) {
   // Configure the LinuxFontDelegate (which queries GtkSettings on desktop
   // Linux) to request subpixel rendering.
   FontRenderParams system_params;
   system_params.subpixel_rendering = FontRenderParams::SUBPIXEL_RENDERING_RGB;
   test_font_delegate_.set_params(system_params);

   // Load a Fontconfig config that enables antialiasing but doesn't say anything
   // about subpixel rendering.
   ASSERT_TRUE(LoadConfigDataIntoFontconfig(temp_dir_.path(),
       std::string(kFontconfigFileHeader) +
       kFontconfigMatchPatternHeader +
       CreateFontconfigEditStanza("antialias", "bool", "true") +
       kFontconfigMatchFooter +
       kFontconfigFileFooter));

   // The subpixel rendering setting from the delegate should make it through.
   FontRenderParams params = GetFontRenderParams(
       FontRenderParamsQuery(), NULL);
   EXPECT_EQ(system_params.subpixel_rendering, params.subpixel_rendering);
 }

 TEST_F(FontRenderParamsTest, NoFontconfigMatch) {
   // Don't load a Fontconfig configuration.
   FontRenderParams system_params;
   system_params.antialiasing = true;
   system_params.hinting = FontRenderParams::HINTING_MEDIUM;
   system_params.subpixel_rendering = FontRenderParams::SUBPIXEL_RENDERING_RGB;
   test_font_delegate_.set_params(system_params);

   FontRenderParamsQuery query;
   query.families.push_back("Arial");
   query.families.push_back("Times New Roman");
   query.pixel_size = 10;
   std::string suggested_family;
   FontRenderParams params = GetFontRenderParams(query, &suggested_family);

   // The system params and the first requested family should be returned.
   EXPECT_EQ(system_params.antialiasing, params.antialiasing);
   EXPECT_EQ(system_params.hinting, params.hinting);
   EXPECT_EQ(system_params.subpixel_rendering, params.subpixel_rendering);
   EXPECT_EQ(query.families[0], suggested_family);
 }

 TEST_F(FontRenderParamsTest, MissingFamily) {
   // With Arial and Verdana installed, request (in order) Helvetica, Arial, and
   // Verdana and check that Arial is returned.
   ASSERT_TRUE(LoadSystemFontIntoFontconfig("arial.ttf"));
   ASSERT_TRUE(LoadSystemFontIntoFontconfig("verdana.ttf"));
   FontRenderParamsQuery query;
   query.families.push_back("Helvetica");
   query.families.push_back("Arial");
   query.families.push_back("Verdana");
   std::string suggested_family;
   GetFontRenderParams(query, &suggested_family);
   EXPECT_EQ("Arial", suggested_family);
 }

 TEST_F(FontRenderParamsTest, SubstituteFamily) {
   // Configure Fontconfig to use Verdana for both Helvetica and Arial.
   ASSERT_TRUE(LoadSystemFontIntoFontconfig("arial.ttf"));
   ASSERT_TRUE(LoadSystemFontIntoFontconfig("verdana.ttf"));
   ASSERT_TRUE(LoadConfigDataIntoFontconfig(temp_dir_.path(),
       std::string(kFontconfigFileHeader) +
       CreateFontconfigAliasStanza("Helvetica", "Verdana") +
       kFontconfigMatchPatternHeader +
       CreateFontconfigTestStanza("family", "eq", "string", "Arial") +
       CreateFontconfigEditStanza("family", "string", "Verdana") +
       kFontconfigMatchFooter +
       kFontconfigFileFooter));

   FontRenderParamsQuery query;
   query.families.push_back("Helvetica");
   std::string suggested_family;
   GetFontRenderParams(query, &suggested_family);
   EXPECT_EQ("Verdana", suggested_family);

   query.families.clear();
   query.families.push_back("Arial");
   suggested_family.clear();
   GetFontRenderParams(query, &suggested_family);
   EXPECT_EQ("Verdana", suggested_family);
 }

 }  // namespace gfx
	// Copyright 2014 The Chromium Authors. All rights reserved.
	// Use of this source code is governed by a BSD-style license that can be
	// found in the LICENSE file.

	#include "ui/gfx/font_render_params.h"

	#include "base/files/scoped_temp_dir.h"
	#include "base/logging.h"
	#include "base/macros.h"
	#include "build/build_config.h"
	#include "testing/gtest/include/gtest/gtest.h"
	#include "ui/gfx/font.h"
	#include "ui/gfx/linux_font_delegate.h"
	#include "ui/gfx/test/fontconfig_util_linux.h"

	namespace gfx {

	namespace {

	// Implementation of LinuxFontDelegate that returns a canned FontRenderParams
	// struct. This is used to isolate tests from the system's local configuration.
	class TestFontDelegate : public LinuxFontDelegate {
	public:
	TestFontDelegate() {}
	~TestFontDelegate() override {}

	void set_params(const FontRenderParams& params) { params_ = params; }

	FontRenderParams GetDefaultFontRenderParams() const override {
	return params_;
	}
	void GetDefaultFontDescription(
	std::string* family_out,
	int* size_pixels_out,
	int* style_out,
	FontRenderParams* params_out) const override {
	NOTIMPLEMENTED();
	}

	private:
	FontRenderParams params_;

	DISALLOW_COPY_AND_ASSIGN(TestFontDelegate);
	};

	} // namespace

	class FontRenderParamsTest : public testing::Test {
	public:
	FontRenderParamsTest() {
	SetUpFontconfig();
	CHECK(temp_dir_.CreateUniqueTempDir());
	original_font_delegate_ = LinuxFontDelegate::instance();
	LinuxFontDelegate::SetInstance(&test_font_delegate_);
	ClearFontRenderParamsCacheForTest();
	}

	~FontRenderParamsTest() override {
	LinuxFontDelegate::SetInstance(
	const_cast<LinuxFontDelegate*>(original_font_delegate_));
	TearDownFontconfig();
	}

	protected:
	base::ScopedTempDir temp_dir_;
	const LinuxFontDelegate* original_font_delegate_;
	TestFontDelegate test_font_delegate_;

	private:
	DISALLOW_COPY_AND_ASSIGN(FontRenderParamsTest);
	};

	TEST_F(FontRenderParamsTest, Default) {
	ASSERT_TRUE(LoadSystemFontIntoFontconfig("arial.ttf"));
	ASSERT_TRUE(LoadConfigDataIntoFontconfig(temp_dir_.path(),
	std::string(kFontconfigFileHeader) +
	// Specify the desired defaults via a font match rather than a pattern
	// match (since this is the style generally used in /etc/fonts/conf.d).
	kFontconfigMatchFontHeader +
	CreateFontconfigEditStanza("antialias", "bool", "true") +
	CreateFontconfigEditStanza("autohint", "bool", "true") +
	CreateFontconfigEditStanza("hinting", "bool", "true") +
	CreateFontconfigEditStanza("hintstyle", "const", "hintslight") +
	CreateFontconfigEditStanza("rgba", "const", "rgb") +
	kFontconfigMatchFooter +
	// Add a font match for Arial. Since it specifies a family, it shouldn't
	// take effect when querying default settings.
	kFontconfigMatchFontHeader +
	CreateFontconfigTestStanza("family", "eq", "string", "Arial") +
	CreateFontconfigEditStanza("antialias", "bool", "true") +
	CreateFontconfigEditStanza("autohint", "bool", "false") +
	CreateFontconfigEditStanza("hinting", "bool", "true") +
	CreateFontconfigEditStanza("hintstyle", "const", "hintfull") +
	CreateFontconfigEditStanza("rgba", "const", "none") +
	kFontconfigMatchFooter +
	// Add font matches for fonts between 10 and 20 points or pixels. Since
	// they specify sizes, they also should not affect the defaults.
	kFontconfigMatchFontHeader +
	CreateFontconfigTestStanza("size", "more_eq", "double", "10.0") +
	CreateFontconfigTestStanza("size", "less_eq", "double", "20.0") +
	CreateFontconfigEditStanza("antialias", "bool", "false") +
	kFontconfigMatchFooter +
	kFontconfigMatchFontHeader +
	CreateFontconfigTestStanza("pixel_size", "more_eq", "double", "10.0") +
	CreateFontconfigTestStanza("pixel_size", "less_eq", "double", "20.0") +
	CreateFontconfigEditStanza("antialias", "bool", "false") +
	kFontconfigMatchFooter +
	kFontconfigFileFooter));

	FontRenderParams params = GetFontRenderParams(
	FontRenderParamsQuery(), NULL);
	EXPECT_TRUE(params.antialiasing);
	EXPECT_TRUE(params.autohinter);
	EXPECT_TRUE(params.use_bitmaps);
	EXPECT_EQ(FontRenderParams::HINTING_SLIGHT, params.hinting);
	EXPECT_FALSE(params.subpixel_positioning);
	EXPECT_EQ(FontRenderParams::SUBPIXEL_RENDERING_RGB,
	params.subpixel_rendering);
	}

	TEST_F(FontRenderParamsTest, Size) {
	ASSERT_TRUE(LoadSystemFontIntoFontconfig("arial.ttf"));
	ASSERT_TRUE(LoadConfigDataIntoFontconfig(temp_dir_.path(),
	std::string(kFontconfigFileHeader) +
	kFontconfigMatchPatternHeader +
	CreateFontconfigEditStanza("antialias", "bool", "true") +
	CreateFontconfigEditStanza("hinting", "bool", "true") +
	CreateFontconfigEditStanza("hintstyle", "const", "hintfull") +
	CreateFontconfigEditStanza("rgba", "const", "none") +
	kFontconfigMatchFooter +
	kFontconfigMatchPatternHeader +
	CreateFontconfigTestStanza("pixelsize", "less_eq", "double", "10") +
	CreateFontconfigEditStanza("antialias", "bool", "false") +
	kFontconfigMatchFooter +
	kFontconfigMatchPatternHeader +
	CreateFontconfigTestStanza("size", "more_eq", "double", "20") +
	CreateFontconfigEditStanza("hintstyle", "const", "hintslight") +
	CreateFontconfigEditStanza("rgba", "const", "rgb") +
	kFontconfigMatchFooter +
	kFontconfigFileFooter));

	// The defaults should be used when the supplied size isn't matched by the
	// second or third blocks.
	FontRenderParamsQuery query;
	query.pixel_size = 12;
	FontRenderParams params = GetFontRenderParams(query, NULL);
	EXPECT_TRUE(params.antialiasing);
	EXPECT_EQ(FontRenderParams::HINTING_FULL, params.hinting);
	EXPECT_EQ(FontRenderParams::SUBPIXEL_RENDERING_NONE,
	params.subpixel_rendering);

	query.pixel_size = 10;
	params = GetFontRenderParams(query, NULL);
	EXPECT_FALSE(params.antialiasing);
	EXPECT_EQ(FontRenderParams::HINTING_FULL, params.hinting);
	EXPECT_EQ(FontRenderParams::SUBPIXEL_RENDERING_NONE,
	params.subpixel_rendering);

	query.pixel_size = 0;
	query.point_size = 20;
	params = GetFontRenderParams(query, NULL);
	EXPECT_TRUE(params.antialiasing);
	EXPECT_EQ(FontRenderParams::HINTING_SLIGHT, params.hinting);
	EXPECT_EQ(FontRenderParams::SUBPIXEL_RENDERING_RGB,
	params.subpixel_rendering);
	}

	TEST_F(FontRenderParamsTest, Style) {
	ASSERT_TRUE(LoadSystemFontIntoFontconfig("arial.ttf"));
	// Load a config that disables subpixel rendering for bold text and disables
	// hinting for italic text.
	ASSERT_TRUE(LoadConfigDataIntoFontconfig(temp_dir_.path(),
	std::string(kFontconfigFileHeader) +
	kFontconfigMatchPatternHeader +
	CreateFontconfigEditStanza("antialias", "bool", "true") +
	CreateFontconfigEditStanza("hinting", "bool", "true") +
	CreateFontconfigEditStanza("hintstyle", "const", "hintslight") +
	CreateFontconfigEditStanza("rgba", "const", "rgb") +
	kFontconfigMatchFooter +
	kFontconfigMatchPatternHeader +
	CreateFontconfigTestStanza("weight", "eq", "const", "bold") +
	CreateFontconfigEditStanza("rgba", "const", "none") +
	kFontconfigMatchFooter +
	kFontconfigMatchPatternHeader +
	CreateFontconfigTestStanza("slant", "eq", "const", "italic") +
	CreateFontconfigEditStanza("hinting", "bool", "false") +
	kFontconfigMatchFooter +
	kFontconfigFileFooter));

	FontRenderParamsQuery query;
	query.style = Font::NORMAL;
	FontRenderParams params = GetFontRenderParams(query, NULL);
	EXPECT_EQ(FontRenderParams::HINTING_SLIGHT, params.hinting);
	EXPECT_EQ(FontRenderParams::SUBPIXEL_RENDERING_RGB,
	params.subpixel_rendering);

	query.style = Font::BOLD;
	params = GetFontRenderParams(query, NULL);
	EXPECT_EQ(FontRenderParams::HINTING_SLIGHT, params.hinting);
	EXPECT_EQ(FontRenderParams::SUBPIXEL_RENDERING_NONE,
	params.subpixel_rendering);

	query.style = Font::ITALIC;
	params = GetFontRenderParams(query, NULL);
	EXPECT_EQ(FontRenderParams::HINTING_NONE, params.hinting);
	EXPECT_EQ(FontRenderParams::SUBPIXEL_RENDERING_RGB,
	params.subpixel_rendering);

	query.style = Font::BOLD \| Font::ITALIC;
	params = GetFontRenderParams(query, NULL);
	EXPECT_EQ(FontRenderParams::HINTING_NONE, params.hinting);
	EXPECT_EQ(FontRenderParams::SUBPIXEL_RENDERING_NONE,
	params.subpixel_rendering);
	}

	TEST_F(FontRenderParamsTest, Scalable) {
	// Load a config that only enables antialiasing for scalable fonts.
	ASSERT_TRUE(LoadConfigDataIntoFontconfig(temp_dir_.path(),
	std::string(kFontconfigFileHeader) +
	kFontconfigMatchPatternHeader +
	CreateFontconfigEditStanza("antialias", "bool", "false") +
	kFontconfigMatchFooter +
	kFontconfigMatchPatternHeader +
	CreateFontconfigTestStanza("scalable", "eq", "bool", "true") +
	CreateFontconfigEditStanza("antialias", "bool", "true") +
	kFontconfigMatchFooter +
	kFontconfigFileFooter));

	// Check that we specifically ask how scalable fonts should be rendered.
	FontRenderParams params = GetFontRenderParams(
	FontRenderParamsQuery(), NULL);
	EXPECT_TRUE(params.antialiasing);
	}

	TEST_F(FontRenderParamsTest, UseBitmaps) {
	ASSERT_TRUE(LoadSystemFontIntoFontconfig("arial.ttf"));
	// Load a config that enables embedded bitmaps for fonts <= 10 pixels.
	ASSERT_TRUE(LoadConfigDataIntoFontconfig(temp_dir_.path(),
	std::string(kFontconfigFileHeader) +
	kFontconfigMatchPatternHeader +
	CreateFontconfigEditStanza("embeddedbitmap", "bool", "false") +
	kFontconfigMatchFooter +
	kFontconfigMatchPatternHeader +
	CreateFontconfigTestStanza("pixelsize", "less_eq", "double", "10") +
	CreateFontconfigEditStanza("embeddedbitmap", "bool", "true") +
	kFontconfigMatchFooter +
	kFontconfigFileFooter));

	FontRenderParamsQuery query;
	FontRenderParams params = GetFontRenderParams(query, NULL);
	EXPECT_FALSE(params.use_bitmaps);

	query.pixel_size = 5;
	params = GetFontRenderParams(query, NULL);
	EXPECT_TRUE(params.use_bitmaps);
	}

	TEST_F(FontRenderParamsTest, ForceFullHintingWhenAntialiasingIsDisabled) {
	// Load a config that disables antialiasing and hinting while requesting
	// subpixel rendering.
	ASSERT_TRUE(LoadConfigDataIntoFontconfig(temp_dir_.path(),
	std::string(kFontconfigFileHeader) +
	kFontconfigMatchPatternHeader +
	CreateFontconfigEditStanza("antialias", "bool", "false") +
	CreateFontconfigEditStanza("hinting", "bool", "false") +
	CreateFontconfigEditStanza("hintstyle", "const", "hintnone") +
	CreateFontconfigEditStanza("rgba", "const", "rgb") +
	kFontconfigMatchFooter +
	kFontconfigFileFooter));

	// Full hinting should be forced. See the comment in GetFontRenderParams() for
	// more information.
	FontRenderParams params = GetFontRenderParams(
	FontRenderParamsQuery(), NULL);
	EXPECT_FALSE(params.antialiasing);
	EXPECT_EQ(FontRenderParams::HINTING_FULL, params.hinting);
	EXPECT_EQ(FontRenderParams::SUBPIXEL_RENDERING_NONE,
	params.subpixel_rendering);
	EXPECT_FALSE(params.subpixel_positioning);
	}

	#if defined(OS_CHROMEOS)
	TEST_F(FontRenderParamsTest, ForceSubpixelPositioning) {
	{
	FontRenderParams params =
	GetFontRenderParams(FontRenderParamsQuery(), NULL);
	EXPECT_TRUE(params.antialiasing);
	EXPECT_FALSE(params.subpixel_positioning);
	SetFontRenderParamsDeviceScaleFactor(1.0f);
	}
	ClearFontRenderParamsCacheForTest();
	SetFontRenderParamsDeviceScaleFactor(1.25f);
	// Subpixel positioning should be forced.
	{
	FontRenderParams params =
	GetFontRenderParams(FontRenderParamsQuery(), NULL);
	EXPECT_TRUE(params.antialiasing);
	EXPECT_TRUE(params.subpixel_positioning);
	SetFontRenderParamsDeviceScaleFactor(1.0f);
	}
	}
	#endif

	TEST_F(FontRenderParamsTest, OnlySetConfiguredValues) {
	// Configure the LinuxFontDelegate (which queries GtkSettings on desktop
	// Linux) to request subpixel rendering.
	FontRenderParams system_params;
	system_params.subpixel_rendering = FontRenderParams::SUBPIXEL_RENDERING_RGB;
	test_font_delegate_.set_params(system_params);

	// Load a Fontconfig config that enables antialiasing but doesn't say anything
	// about subpixel rendering.
	ASSERT_TRUE(LoadConfigDataIntoFontconfig(temp_dir_.path(),
	std::string(kFontconfigFileHeader) +
	kFontconfigMatchPatternHeader +
	CreateFontconfigEditStanza("antialias", "bool", "true") +
	kFontconfigMatchFooter +
	kFontconfigFileFooter));

	// The subpixel rendering setting from the delegate should make it through.
	FontRenderParams params = GetFontRenderParams(
	FontRenderParamsQuery(), NULL);
	EXPECT_EQ(system_params.subpixel_rendering, params.subpixel_rendering);
	}

	TEST_F(FontRenderParamsTest, NoFontconfigMatch) {
	// Don't load a Fontconfig configuration.
	FontRenderParams system_params;
	system_params.antialiasing = true;
	system_params.hinting = FontRenderParams::HINTING_MEDIUM;
	system_params.subpixel_rendering = FontRenderParams::SUBPIXEL_RENDERING_RGB;
	test_font_delegate_.set_params(system_params);

	FontRenderParamsQuery query;
	query.families.push_back("Arial");
	query.families.push_back("Times New Roman");
	query.pixel_size = 10;
	std::string suggested_family;
	FontRenderParams params = GetFontRenderParams(query, &suggested_family);

	// The system params and the first requested family should be returned.
	EXPECT_EQ(system_params.antialiasing, params.antialiasing);
	EXPECT_EQ(system_params.hinting, params.hinting);
	EXPECT_EQ(system_params.subpixel_rendering, params.subpixel_rendering);
	EXPECT_EQ(query.families[0], suggested_family);
	}

	TEST_F(FontRenderParamsTest, MissingFamily) {
	// With Arial and Verdana installed, request (in order) Helvetica, Arial, and
	// Verdana and check that Arial is returned.
	ASSERT_TRUE(LoadSystemFontIntoFontconfig("arial.ttf"));
	ASSERT_TRUE(LoadSystemFontIntoFontconfig("verdana.ttf"));
	FontRenderParamsQuery query;
	query.families.push_back("Helvetica");
	query.families.push_back("Arial");
	query.families.push_back("Verdana");
	std::string suggested_family;
	GetFontRenderParams(query, &suggested_family);
	EXPECT_EQ("Arial", suggested_family);
	}

	TEST_F(FontRenderParamsTest, SubstituteFamily) {
	// Configure Fontconfig to use Verdana for both Helvetica and Arial.
	ASSERT_TRUE(LoadSystemFontIntoFontconfig("arial.ttf"));
	ASSERT_TRUE(LoadSystemFontIntoFontconfig("verdana.ttf"));
	ASSERT_TRUE(LoadConfigDataIntoFontconfig(temp_dir_.path(),
	std::string(kFontconfigFileHeader) +
	CreateFontconfigAliasStanza("Helvetica", "Verdana") +
	kFontconfigMatchPatternHeader +
	CreateFontconfigTestStanza("family", "eq", "string", "Arial") +
	CreateFontconfigEditStanza("family", "string", "Verdana") +
	kFontconfigMatchFooter +
	kFontconfigFileFooter));

	FontRenderParamsQuery query;
	query.families.push_back("Helvetica");
	std::string suggested_family;
	GetFontRenderParams(query, &suggested_family);
	EXPECT_EQ("Verdana", suggested_family);

	query.families.clear();
	query.families.push_back("Arial");
	suggested_family.clear();
	GetFontRenderParams(query, &suggested_family);
	EXPECT_EQ("Verdana", suggested_family);
	}

	} // namespace gfx