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// Copyright 2024 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "third_party/blink/renderer/platform/fonts/shaping/harfbuzz_face.h"
#include "hb.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "third_party/blink/renderer/platform/fonts/font.h"
#include "third_party/blink/renderer/platform/fonts/font_platform_data.h"
#include "third_party/blink/renderer/platform/fonts/glyph.h"
#include "third_party/blink/renderer/platform/fonts/shaping/variation_selector_mode.h"
#include "third_party/blink/renderer/platform/testing/font_test_helpers.h"
#include "third_party/blink/renderer/platform/testing/runtime_enabled_features_test_helpers.h"
#include "third_party/blink/renderer/platform/testing/unit_test_helpers.h"
#include "third_party/googletest/src/googletest/include/gtest/gtest.h"
namespace blink {
namespace {
String WPTFontPath(const String& font_name) {
return test::BlinkWebTestsDir() +
"/external/wpt/css/css-fonts/resources/vs/" + font_name;
}
hb_codepoint_t GetGlyphForVariationSequenceFromFont(
Font* font,
UChar32 character,
UChar32 variation_selector) {
const FontPlatformData& font_without_char_platform_data =
font->PrimaryFont()->PlatformData();
HarfBuzzFace* face_without_char =
font_without_char_platform_data.GetHarfBuzzFace();
EXPECT_TRUE(face_without_char);
return face_without_char->HarfBuzzGetGlyphForTesting(character,
variation_selector);
}
hb_codepoint_t GetGlyphForEmojiVSFromFontWithVS15(UChar32 character,
UChar32 variation_selector) {
Font* font =
test::CreateTestFont(AtomicString("Noto Emoji"),
WPTFontPath("NotoEmoji-Regular_subset.ttf"), 11);
return GetGlyphForVariationSequenceFromFont(font, character,
variation_selector);
}
hb_codepoint_t GetGlyphForEmojiVSFromFontWithVS16(UChar32 character,
UChar32 variation_selector) {
Font* font = test::CreateTestFont(
AtomicString("Noto Color Emoji"),
WPTFontPath("NotoColorEmoji-Regular_subset.ttf"), 11);
return GetGlyphForVariationSequenceFromFont(font, character,
variation_selector);
}
hb_codepoint_t GetGlyphForEmojiVSFromFontWithBaseCharOnly(
UChar32 character,
UChar32 variation_selector) {
Font* font = test::CreateTestFont(
AtomicString("Noto Emoji Without VS"),
WPTFontPath("NotoEmoji-Regular_without-cmap14-subset.ttf"), 11);
return GetGlyphForVariationSequenceFromFont(font, character,
variation_selector);
}
hb_codepoint_t GetGlyphForStandardizedVSFromFontWithBaseCharOnly() {
UChar32 character = kMongolianLetterA;
UChar32 variation_selector = kMongolianFreeVariationSelectorTwo;
Font* font = test::CreateTestFont(AtomicString("Noto Sans Mongolian"),
blink::test::BlinkWebTestsFontsTestDataPath(
"noto/NotoSansMongolian-regular.woff2"),
11);
return GetGlyphForVariationSequenceFromFont(font, character,
variation_selector);
}
hb_codepoint_t GetGlyphForCJKVSFromFontWithVS() {
UChar32 character = kFullwidthExclamationMark;
UChar32 variation_selector = kVariationSelector2Character;
Font* font = test::CreateTestFont(
AtomicString("Noto Sans CJK JP"),
blink::test::BlinkWebTestsFontsTestDataPath(
"noto/cjk/NotoSansCJKjp-Regular-subset-chws.otf"),
11);
return GetGlyphForVariationSequenceFromFont(font, character,
variation_selector);
}
} // namespace
TEST(HarfBuzzFaceTest, HarfBuzzGetNominalGlyph_TestFontWithVS) {
HarfBuzzFace::SetVariationSelectorMode(kUseSpecifiedVariationSelector);
hb_codepoint_t glyph = GetGlyphForCJKVSFromFontWithVS();
EXPECT_TRUE(glyph);
EXPECT_NE(glyph, kUnmatchedVSGlyphId);
}
TEST(HarfBuzzFaceTest, HarfBuzzGetNominalGlyph_TestFontWithVS_IgnoreVS) {
HarfBuzzFace::SetVariationSelectorMode(kIgnoreVariationSelector);
hb_codepoint_t glyph = GetGlyphForCJKVSFromFontWithVS();
EXPECT_TRUE(glyph);
EXPECT_NE(glyph, kUnmatchedVSGlyphId);
}
TEST(HarfBuzzFaceTest, HarfBuzzGetNominalGlyph_TestFontWithBaseCharOnly) {
HarfBuzzFace::SetVariationSelectorMode(kUseSpecifiedVariationSelector);
EXPECT_EQ(GetGlyphForStandardizedVSFromFontWithBaseCharOnly(),
kUnmatchedVSGlyphId);
}
TEST(HarfBuzzFaceTest,
HarfBuzzGetNominalGlyph_TestFontWithBaseCharOnly_IgnoreVS) {
HarfBuzzFace::SetVariationSelectorMode(kIgnoreVariationSelector);
hb_codepoint_t glyph = GetGlyphForStandardizedVSFromFontWithBaseCharOnly();
EXPECT_FALSE(glyph);
}
TEST(HarfBuzzFaceTest, HarfBuzzGetNominalGlyph_TestFontWithoutBaseChar) {
HarfBuzzFace::SetVariationSelectorMode(kUseSpecifiedVariationSelector);
UChar32 character = kFullwidthExclamationMark;
UChar32 variation_selector = kVariationSelector2Character;
Font* font = test::CreateAhemFont(11);
EXPECT_FALSE(GetGlyphForVariationSequenceFromFont(font, character,
variation_selector));
}
TEST(HarfBuzzFaceTest, HarfBuzzGetNominalGlyph_TestVariantEmojiEmoji) {
HarfBuzzFace::SetVariationSelectorMode(kForceVariationSelector16);
UChar32 character = kShakingFaceEmoji;
UChar32 variation_selector = 0;
hb_codepoint_t glyph_from_font_with_vs15 =
GetGlyphForEmojiVSFromFontWithVS15(character, variation_selector);
EXPECT_EQ(glyph_from_font_with_vs15, kUnmatchedVSGlyphId);
hb_codepoint_t glyph_from_font_with_vs16 =
GetGlyphForEmojiVSFromFontWithVS16(character, variation_selector);
EXPECT_TRUE(glyph_from_font_with_vs16);
EXPECT_NE(glyph_from_font_with_vs16, kUnmatchedVSGlyphId);
if (!RuntimeEnabledFeatures::SystemFallbackEmojiVSSupportEnabled()) {
hb_codepoint_t glyph_from_font_without_vs =
GetGlyphForEmojiVSFromFontWithBaseCharOnly(character,
variation_selector);
EXPECT_EQ(glyph_from_font_without_vs, kUnmatchedVSGlyphId);
}
}
TEST(HarfBuzzFaceTest, HarfBuzzGetNominalGlyph_TestVariantEmojiText) {
HarfBuzzFace::SetVariationSelectorMode(kForceVariationSelector15);
UChar32 character = kShakingFaceEmoji;
UChar32 variation_selector = 0;
hb_codepoint_t glyph_from_font_with_vs15 =
GetGlyphForEmojiVSFromFontWithVS15(character, variation_selector);
EXPECT_TRUE(glyph_from_font_with_vs15);
EXPECT_NE(glyph_from_font_with_vs15, kUnmatchedVSGlyphId);
hb_codepoint_t glyph_from_font_with_vs16 =
GetGlyphForEmojiVSFromFontWithVS16(character, variation_selector);
EXPECT_EQ(glyph_from_font_with_vs16, kUnmatchedVSGlyphId);
if (!RuntimeEnabledFeatures::SystemFallbackEmojiVSSupportEnabled()) {
hb_codepoint_t glyph_from_font_without_vs =
GetGlyphForEmojiVSFromFontWithBaseCharOnly(character,
variation_selector);
EXPECT_EQ(glyph_from_font_without_vs, kUnmatchedVSGlyphId);
}
}
TEST(HarfBuzzFaceTest, HarfBuzzGetNominalGlyph_TestVariantEmojiUnicode) {
HarfBuzzFace::SetVariationSelectorMode(kUseUnicodeDefaultPresentation);
UChar32 character = kShakingFaceEmoji;
UChar32 variation_selector = 0;
hb_codepoint_t glyph_from_font_with_vs15 =
GetGlyphForEmojiVSFromFontWithVS15(character, variation_selector);
EXPECT_EQ(glyph_from_font_with_vs15, kUnmatchedVSGlyphId);
hb_codepoint_t glyph_from_font_with_vs16 =
GetGlyphForEmojiVSFromFontWithVS16(character, variation_selector);
EXPECT_TRUE(glyph_from_font_with_vs16);
EXPECT_NE(glyph_from_font_with_vs16, kUnmatchedVSGlyphId);
if (!RuntimeEnabledFeatures::SystemFallbackEmojiVSSupportEnabled()) {
hb_codepoint_t glyph_from_font_without_vs =
GetGlyphForEmojiVSFromFontWithBaseCharOnly(character,
variation_selector);
EXPECT_EQ(glyph_from_font_without_vs, kUnmatchedVSGlyphId);
}
}
TEST(HarfBuzzFaceTest, HarfBuzzGetNominalGlyph_TestVSOverrideVariantEmoji) {
HarfBuzzFace::SetVariationSelectorMode(kForceVariationSelector16);
UChar32 character = kShakingFaceEmoji;
UChar32 variation_selector = kVariationSelector15Character;
hb_codepoint_t glyph_from_font_with_vs15 =
GetGlyphForEmojiVSFromFontWithVS15(character, variation_selector);
EXPECT_TRUE(glyph_from_font_with_vs15);
EXPECT_NE(glyph_from_font_with_vs15, kUnmatchedVSGlyphId);
hb_codepoint_t glyph_from_font_with_vs16 =
GetGlyphForEmojiVSFromFontWithVS16(character, variation_selector);
EXPECT_EQ(glyph_from_font_with_vs16, kUnmatchedVSGlyphId);
if (!RuntimeEnabledFeatures::SystemFallbackEmojiVSSupportEnabled()) {
hb_codepoint_t glyph_from_font_without_vs =
GetGlyphForEmojiVSFromFontWithBaseCharOnly(character,
variation_selector);
EXPECT_EQ(glyph_from_font_without_vs, kUnmatchedVSGlyphId);
}
}
// Test emoji variation selectors support in system fallback. We are only
// enabling this feature on Windows, Android and Mac platforms.
#if BUILDFLAG(IS_MAC) || BUILDFLAG(IS_ANDROID) || BUILDFLAG(IS_WIN)
TEST(HarfBuzzFaceTest, HarfBuzzGetNominalGlyph_TestSystemFallbackEmojiVS) {
ScopedSystemFallbackEmojiVSSupportForTest scoped_system_emoji_vs_feature(
true);
HarfBuzzFace::SetVariationSelectorMode(kUseSpecifiedVariationSelector);
UChar32 character = kShakingFaceEmoji;
hb_codepoint_t glyph_from_font_with_vs15 = GetGlyphForEmojiVSFromFontWithVS15(
character, kVariationSelector15Character);
EXPECT_TRUE(glyph_from_font_with_vs15);
EXPECT_NE(glyph_from_font_with_vs15, kUnmatchedVSGlyphId);
hb_codepoint_t glyph_from_font_with_vs16 = GetGlyphForEmojiVSFromFontWithVS16(
character, kVariationSelector16Character);
EXPECT_TRUE(glyph_from_font_with_vs16);
EXPECT_NE(glyph_from_font_with_vs16, kUnmatchedVSGlyphId);
hb_codepoint_t glyph_from_font_without_vs =
GetGlyphForEmojiVSFromFontWithBaseCharOnly(character, 0);
EXPECT_TRUE(glyph_from_font_without_vs);
EXPECT_NE(glyph_from_font_without_vs, kUnmatchedVSGlyphId);
}
#endif
} // namespace blink
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