eepp/src/tests/unit_tests/fontrendering.cpp

#include "utest.hpp"

#include <eepp/graphics/fontbmfont.hpp>
#include <eepp/graphics/fontfamily.hpp>
#include <eepp/graphics/fontmanager.hpp>
#include <eepp/graphics/fontsprite.hpp>
#include <eepp/graphics/fonttruetype.hpp>
#include <eepp/graphics/image.hpp>
#include <eepp/graphics/primitives.hpp>
#include <eepp/graphics/renderer/renderergl.hpp>
#include <eepp/graphics/text.hpp>
#include <eepp/scene/scenemanager.hpp>
#include <eepp/system/filesystem.hpp>
#include <eepp/system/scopedop.hpp>
#include <eepp/system/sys.hpp>
#include <eepp/ui/uiapplication.hpp>
#include <eepp/ui/uicodeeditor.hpp>
#include <eepp/ui/uiscenenode.hpp>
#include <eepp/ui/uitextedit.hpp>
#include <eepp/ui/uitextview.hpp>
#include <eepp/ui/uithememanager.hpp>
#include <eepp/window/engine.hpp>

#include <iostream>

using namespace EE;
using namespace EE::Scene;
using namespace EE::System;
using namespace EE::Graphics;
using namespace EE::Window;
using namespace EE::UI;

static void compareImages( utest_state_s& utest_state, int* utest_result, EE::Window::Window* win,
						   const std::string& imageName ) {
	auto saveType = Image::SaveType::WEBP;
	auto saveExt( Image::saveTypeToExtension( saveType ) );
	std::string expectedImagePath( "assets/fontrendering/" + imageName + "." + saveExt );

	Image::FormatConfiguration fconf;
	fconf.webpSaveLossless( true );

	Image actualImage = win->getFrontBufferImage();
	actualImage.setImageFormatConfiguration( fconf );

	if ( !FileSystem::fileExists( expectedImagePath ) )
		actualImage.saveToFile( expectedImagePath, saveType );

	Image expectedImage( expectedImagePath );
	ASSERT_TRUE( expectedImage.getPixelsPtr() != nullptr );
	EXPECT_EQ_MSG( expectedImage.getWidth(), actualImage.getWidth(), "Images width not equal" );
	EXPECT_EQ_MSG( expectedImage.getHeight(), actualImage.getHeight(), "Images height not equal" );

	Image::DiffResult result = actualImage.diff( expectedImage );
	EXPECT_TRUE( result.areSame() );
	if ( !result.areSame() ) {
		auto saveExt( Image::saveTypeToExtension( saveType ) );
		std::string withTextShaper =
			Text::TextShaperEnabled
				? ( Text::TextShaperOptimizations ? "_text_shape_no_opt" : "_text_shape" )
				: "";
		std::cerr << "Test FAILED: " << result.numDifferentPixels << " pixels differ." << std::endl;
		std::cerr << "Maximum perceptual difference (Delta E): " << result.maxDeltaE << std::endl;
		if ( !FileSystem::fileExists( "output" ) )
			FileSystem::makeDir( "output" );
		std::string actualImagePath =
			"output/" + imageName + "_actual_output" + withTextShaper + "." + saveExt;
		actualImage.saveToFile( actualImagePath, saveType );
		std::cerr << "Actual image saved to: " << actualImagePath << std::endl;
		if ( result.diffImage ) {
			std::string diffImagePath =
				"output/" + imageName + "_diff_output" + withTextShaper + "." + saveExt;
			result.diffImage->setImageFormatConfiguration( fconf );
			result.diffImage->saveToFile( diffImagePath, saveType );
			std::cerr << "Visual diff saved to: " << diffImagePath << std::endl;
		}
	}
}

UTEST( FontRendering, fontsTest ) {
	FileSystem::changeWorkingDirectory( Sys::getProcessPath() );

	auto win = Engine::instance()->createWindow(
		WindowSettings( 1024, 650, "eepp - Fonts", WindowStyle::Default, WindowBackend::Default, 32,
						{}, 1, false, true ) );

	ASSERT_TRUE_MSG( win->isOpen(), "Failed to create Window" );

	UTEST_PRINT_INFO( GLi->getRenderer().c_str() );

	win->setClearColor( RGB( 230, 230, 230 ) );

	String Txt( "Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod "
				"tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, "
				"quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo "
				"consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse "
				"cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non "
				"proident, sunt in culpa qui officia deserunt mollit anim id est laborum." );

	FontTrueType* fontTest = FontTrueType::New( "DejaVuSansMono" );
	fontTest->loadFromFile( "../assets/fonts/DejaVuSansMono.ttf" );

	FontTrueType* fontTest2 = FontTrueType::New( "NotoSans-Regular" );
	fontTest2->loadFromFile( "../assets/fonts/NotoSans-Regular.ttf" );

	FontTrueType* fontEmoji = FontTrueType::New( "NotoEmoji-Regular" );
	fontEmoji->loadFromFile( "../assets/fonts/NotoEmoji-Regular.ttf" );

	FontTrueType* fontEmojiColor = FontTrueType::New( "NotoColorEmoji" );
	fontEmojiColor->loadFromFile( "../assets/fonts/NotoColorEmoji.ttf" );

	FontBMFont* fontBMFont = FontBMFont::New( "bmfont" );
	fontBMFont->loadFromFile( "../assets/fonts/bmfont.fnt" );

	FontSprite* fontSprite = FontSprite::New( "alagard" );
	fontSprite->loadFromFile( "../assets/fonts/custom_alagard.png", Color::Fuchsia, 32, -4 );

	Text text;
	text.setFont( fontTest );
	text.setFontSize( 24 );
	text.setAlign( TEXT_ALIGN_CENTER );
	text.setString( Txt );
	text.wrapText( win->getWidth() - 96 );

	int size = (int)Txt.size();

	for ( int i = 0; i < size; i++ ) {
		text.setFillColor( Color( 255 * i / size, 0, 0, 255 ), i, i + 1 );
	}

	Text text2;
	text2.setFont( fontTest2 );
	text2.setString( "Lorem ipsum dolor sit amet, consectetur adipisicing elit. 👽" );
	text2.setFontSize( 32 );
	text2.setFillColor( Color::Black );

	Text text3;
	text3.setFont( fontTest );
	text3.setString( text2.getString() );
	text3.setFontSize( 24 );
	text3.setFillColor( Color( 255, 255, 255, 255 ) );
	text3.setOutlineThickness( 2 );
	text3.setOutlineColor( Color( 0, 0, 0, 255 ) );

	Text text4;
	text4.setFont( fontBMFont );
	text4.setString( text2.getString() );
	text4.setFontSize( 45 );
	text4.setFillColor( Color::Black );

	Text text5;
	text5.setFont( fontSprite );
	text5.setString( text2.getString() );
	text5.setFontSize( 38 );

	Text text6;
	text6.setFont( fontEmojiColor );
	text6.setFontSize( 64 );
	text6.setString( "👽 😀 💩 😃 👻" );

	Text text7;
	text7.setFont( fontEmoji );
	text7.setFontSize( 32 );
	text7.setString( "👽 😀 💩 😃 👻" );
	text7.setFillColor( Color::Gray );
	text7.setOutlineThickness( 2 );
	text7.setOutlineColor( Color( 0, 0, 0, 255 ) );

	{
		const auto runTest = [&]() {
			win->clear();

			Float offsetY = 0;
			text.draw( 0, 0 );
			text2.draw( 0, ( offsetY += text.getTextHeight() + 16 ) );
			text7.draw( 0, ( offsetY += text2.getTextHeight() + 16 ) );
			text3.draw( 0, ( offsetY += text7.getTextHeight() + 16 ) );
			text4.draw( 0, ( offsetY += text3.getTextHeight() + 16 ) );
			text5.draw( 0, ( offsetY += text4.getTextHeight() + 16 ) );
			text6.draw( 0, ( offsetY += text5.getTextHeight() + 16 ) );

			compareImages( utest_state, utest_result, win, "eepp-fonts" );
		};

		UTEST_PRINT_STEP( "Text Shaper disabled" );
		{
			BoolScopedOp op( Text::TextShaperEnabled, false );
			runTest();
		}

		UTEST_PRINT_STEP( "Text Shaper enabled" );
		{
			BoolScopedOp op( Text::TextShaperEnabled, true );
			runTest();

			UTEST_PRINT_STEP( "Text Shaper enabled w/o optimizations" );
			BoolScopedOp op2( Text::TextShaperOptimizations, false );
			runTest();
		}
	}

	Engine::destroySingleton();
}

UTEST( FontRendering, editorTest ) {
	const auto runTest = [&]() {
		UIApplication app(
			WindowSettings( 1024, 650, "eepp - CodeEditor", WindowStyle::Default,
							WindowBackend::Default, 32, {}, 1, false, true ),
			UIApplication::Settings( Sys::getProcessPath() + ".." + FileSystem::getOSSlash(), 1 ) );
		FileSystem::changeWorkingDirectory( Sys::getProcessPath() );
		auto* editor = UICodeEditor::New();
		editor->setPixelsSize( app.getUI()->getPixelsSize() );
		editor->loadFromFile( "assets/textformat/english.utf8.lf.bom.txt" );
		SceneManager::instance()->update();
		SceneManager::instance()->draw();
		compareImages( utest_state, utest_result, app.getWindow(), "eepp-editor-monospace" );
	};

	UTEST_PRINT_STEP( "Text Shaper disabled" );
	{
		BoolScopedOp op( Text::TextShaperEnabled, false );
		runTest();
	}

	UTEST_PRINT_STEP( "Text Shaper enabled" );
	{
		BoolScopedOp op( Text::TextShaperEnabled, true );
		runTest();

		UTEST_PRINT_STEP( "Text Shaper enabled w/o optimizations" );
		BoolScopedOp op2( Text::TextShaperOptimizations, false );
		runTest();
	}
}

UTEST( FontRendering, textEditTest ) {
	const auto runTest = [&]() {
		UIApplication app(
			WindowSettings( 1024, 650, "eepp - TextEdit", WindowStyle::Default,
							WindowBackend::Default, 32, {}, 1, false, true ),
			UIApplication::Settings( Sys::getProcessPath() + ".." + FileSystem::getOSSlash(), 1 ) );
		FileSystem::changeWorkingDirectory( Sys::getProcessPath() );
		auto* editor = UITextEdit::New();
		editor->setPixelsSize( app.getUI()->getPixelsSize() );
		editor->loadFromFile( "assets/textformat/english.utf8.lf.bom.txt" );
		SceneManager::instance()->update();
		SceneManager::instance()->draw();
		compareImages( utest_state, utest_result, app.getWindow(), "eepp-textedit" );
	};

	UTEST_PRINT_STEP( "Text Shaper disabled" );
	{
		BoolScopedOp op( Text::TextShaperEnabled, false );
		runTest();
	}

	UTEST_PRINT_STEP( "Text Shaper enabled" );
	{
		BoolScopedOp op( Text::TextShaperEnabled, true );
		runTest();

		UTEST_PRINT_STEP( "Text Shaper enabled w/o optimizations" );
		BoolScopedOp op2( Text::TextShaperOptimizations, false );
		runTest();
	}
}

UTEST( FontRendering, tabsTest ) {
	const auto runTest = [&]() {
		UIApplication app(
			WindowSettings( 1024, 650, "eepp - Tabs Test", WindowStyle::Default,
							WindowBackend::Default, 32, {}, 1, false, true ),
			UIApplication::Settings( Sys::getProcessPath() + ".." + FileSystem::getOSSlash(), 1 ) );
		FileSystem::changeWorkingDirectory( Sys::getProcessPath() );
		auto* editor = UICodeEditor::New();
		editor->setPixelsSize( app.getUI()->getPixelsSize() );
		editor->loadFromFile( "assets/textfiles/test-tabs.txt" );
		SceneManager::instance()->update();
		SceneManager::instance()->draw();
		compareImages( utest_state, utest_result, app.getWindow(),
					   "eepp-editor-monospace-tabs-test" );
	};

	UTEST_PRINT_STEP( "Text Shaper disabled" );
	{
		BoolScopedOp op( Text::TextShaperEnabled, false );
		runTest();
	}

	UTEST_PRINT_STEP( "Text Shaper enabled" );
	{
		BoolScopedOp op( Text::TextShaperEnabled, true );
		runTest();

		UTEST_PRINT_STEP( "Text Shaper enabled w/o optimizations" );
		BoolScopedOp op2( Text::TextShaperOptimizations, false );
		runTest();
	}
}

UTEST( FontRendering, tabStopTest ) {
	const auto runTest = [&]() {
		UIApplication app(
			WindowSettings( 1024, 650, "eepp - Tab Stop Test", WindowStyle::Default,
							WindowBackend::Default, 32, {}, 1, false, true ),
			UIApplication::Settings( Sys::getProcessPath() + ".." + FileSystem::getOSSlash(), 1 ) );
		FileSystem::changeWorkingDirectory( Sys::getProcessPath() );
		auto* editor = UICodeEditor::New();
		editor->setTabStops( true );
		editor->setPixelsSize( app.getUI()->getPixelsSize() );
		editor->loadFromFile( "assets/textfiles/test-tabs.txt" );
		SceneManager::instance()->update();
		SceneManager::instance()->draw();
		compareImages( utest_state, utest_result, app.getWindow(),
					   "eepp-editor-monospace-tab-stop-test" );
	};

	UTEST_PRINT_STEP( "Text Shaper disabled" );
	{
		BoolScopedOp op( Text::TextShaperEnabled, false );
		runTest();
	}

	UTEST_PRINT_STEP( "Text Shaper enabled" );
	{
		BoolScopedOp op( Text::TextShaperEnabled, true );
		runTest();

		UTEST_PRINT_STEP( "Text Shaper enabled w/o optimizations" );
		BoolScopedOp op2( Text::TextShaperOptimizations, false );
		runTest();
	}
}

UTEST( FontRendering, tabsTextEditTest ) {
	const auto runTest = [&]() {
		UIApplication app(
			WindowSettings( 1024, 650, "eepp - TextEdit - Tabs Test", WindowStyle::Default,
							WindowBackend::Default, 32, {}, 1, false, true ),
			UIApplication::Settings( Sys::getProcessPath() + ".." + FileSystem::getOSSlash(), 1 ) );
		FileSystem::changeWorkingDirectory( Sys::getProcessPath() );
		auto* editor = UITextEdit::New();
		editor->setPixelsSize( app.getUI()->getPixelsSize() );
		editor->loadFromFile( "assets/textfiles/test-tabs.txt" );
		SceneManager::instance()->update();
		SceneManager::instance()->draw();
		compareImages( utest_state, utest_result, app.getWindow(), "eepp-text-edit-tabs-test" );
	};

	UTEST_PRINT_STEP( "Text Shaper disabled" );
	{
		BoolScopedOp op( Text::TextShaperEnabled, false );
		runTest();
	}

	UTEST_PRINT_STEP( "Text Shaper enabled" );
	{
		BoolScopedOp op( Text::TextShaperEnabled, true );
		runTest();

		UTEST_PRINT_STEP( "Text Shaper enabled w/o optimizations" );
		BoolScopedOp op2( Text::TextShaperOptimizations, false );
		runTest();
	}
}

UTEST( FontRendering, tabStopTextEditTest ) {
	const auto runTest = [&]() {
		UIApplication app(
			WindowSettings( 1024, 650, "eepp - TextEdit - Tab Stop Test", WindowStyle::Default,
							WindowBackend::Default, 32, {}, 1, false, true ),
			UIApplication::Settings( Sys::getProcessPath() + ".." + FileSystem::getOSSlash(), 1 ) );
		FileSystem::changeWorkingDirectory( Sys::getProcessPath() );
		auto* editor = UITextEdit::New();
		editor->setTabStops( true );
		editor->setPixelsSize( app.getUI()->getPixelsSize() );
		editor->loadFromFile( "assets/textfiles/test-tabs.txt" );
		SceneManager::instance()->update();
		SceneManager::instance()->draw();
		compareImages( utest_state, utest_result, app.getWindow(), "eepp-text-edit-tab-stop-test" );
	};

	UTEST_PRINT_STEP( "Text Shaper disabled" );
	{
		BoolScopedOp op( Text::TextShaperEnabled, false );
		runTest();
	}

	UTEST_PRINT_STEP( "Text Shaper enabled" );
	{
		BoolScopedOp op( Text::TextShaperEnabled, true );
		runTest();

		UTEST_PRINT_STEP( "Text Shaper enabled w/o optimizations" );
		BoolScopedOp op2( Text::TextShaperOptimizations, false );
		runTest();
	}
}

UTEST( FontRendering, textViewTest ) {
	const auto runTest = [&]() {
		UIApplication app( WindowSettings( 1024, 650, "eepp - TextView", WindowStyle::Default,
										   WindowBackend::Default, 32, {}, 1, false, true ),
						   UIApplication::Settings(
							   Sys::getProcessPath() + ".." + FileSystem::getOSSlash(), 1.5f ) );
		FileSystem::changeWorkingDirectory( Sys::getProcessPath() );
		auto* view = UITextView::New();
		view->setPixelsSize( app.getUI()->getPixelsSize() );
		std::string file;
		FileSystem::fileGet( "assets/textformat/english.utf8.lf.bom.txt", file );
		view->setText( file );
		SceneManager::instance()->update();
		SceneManager::instance()->draw();
		compareImages( utest_state, utest_result, app.getWindow(), "eepp-textview" );
	};

	UTEST_PRINT_STEP( "Text Shaper disabled" );
	{
		BoolScopedOp op( Text::TextShaperEnabled, false );
		runTest();
	}

	UTEST_PRINT_STEP( "Text Shaper enabled" );
	{
		BoolScopedOp op( Text::TextShaperEnabled, true );
		runTest();

		UTEST_PRINT_STEP( "Text Shaper enabled w/o optimizations" );
		BoolScopedOp op2( Text::TextShaperOptimizations, false );
		runTest();
	}
}

UTEST( FontRendering, textEditBengaliTest ) {
	BoolScopedOp op( Text::TextShaperEnabled, true );
	UIApplication app(
		WindowSettings( 1024, 650, "eepp - TextEdit Bengali", WindowStyle::Default,
						WindowBackend::Default, 32, {}, 1, false, true ),
		UIApplication::Settings( Sys::getProcessPath() + ".." + FileSystem::getOSSlash(), 1.5f ) );
	FileSystem::changeWorkingDirectory( Sys::getProcessPath() );
	FontTrueType* bengaliFont =
		FontTrueType::New( "NotoSansBengali-Regular", "assets/fonts/NotoSansBengali-Regular.ttf" );
	FontManager::instance()->addFallbackFont( bengaliFont );
	UTEST_PRINT_STEP( "Text Shaper enabled" );
	auto* editor = UITextEdit::New();
	// editor->setFontSize( PixelDensity::dpToPx( 12 ) );
	editor->setPixelsSize( app.getUI()->getPixelsSize() );
	editor->loadFromFile( "assets/textfiles/test-bengali.uext" );
	SceneManager::instance()->update();
	SceneManager::instance()->draw();
	compareImages( utest_state, utest_result, app.getWindow(), "eepp-textedit-bengali" );
}

UTEST( FontRendering, textEditArabicTest ) {
	BoolScopedOp op( Text::TextShaperEnabled, true );
	UIApplication app(
		WindowSettings( 1024, 650, "eepp - TextEdit Arabic", WindowStyle::Default,
						WindowBackend::Default, 32, {}, 1, false, true ),
		UIApplication::Settings( Sys::getProcessPath() + ".." + FileSystem::getOSSlash(), 1.5f ) );
	FileSystem::changeWorkingDirectory( Sys::getProcessPath() );
	FontTrueType* arabicFont =
		FontTrueType::New( "NotoNaskhArabic-Regular", "assets/fonts/NotoNaskhArabic-Regular.ttf" );
	FontManager::instance()->addFallbackFont( arabicFont );
	UTEST_PRINT_STEP( "Text Shaper enabled" );
	auto* editor = UITextEdit::New();
	// editor->setFontSize( PixelDensity::dpToPx( 12 ) );
	editor->setPixelsSize( app.getUI()->getPixelsSize() );
	editor->loadFromFile( "assets/textfiles/test-arabic.uext" );
	SceneManager::instance()->update();
	SceneManager::instance()->draw();
	compareImages( utest_state, utest_result, app.getWindow(), "eepp-textedit-arabic" );
}

UTEST( FontRendering, textEditHebrewTest ) {
	BoolScopedOp op( Text::TextShaperEnabled, true );
	UIApplication app(
		WindowSettings( 1024, 650, "eepp - TextEdit Hebrew", WindowStyle::Default,
						WindowBackend::Default, 32, {}, 1, false, true ),
		UIApplication::Settings( Sys::getProcessPath() + ".." + FileSystem::getOSSlash(), 1.5f ) );
	FileSystem::changeWorkingDirectory( Sys::getProcessPath() );
	FontTrueType* hebrewFont =
		FontTrueType::New( "NotoSansHebrew-Regular", "assets/fonts/NotoSansHebrew-Regular.ttf" );
	FontManager::instance()->addFallbackFont( hebrewFont );
	UTEST_PRINT_STEP( "Text Shaper enabled" );
	auto* editor = UITextEdit::New();
	// editor->setFontSize( PixelDensity::dpToPx( 12 ) );
	editor->setPixelsSize( app.getUI()->getPixelsSize() );
	editor->loadFromFile( "assets/textfiles/test-hebrew.uext" );
	SceneManager::instance()->update();
	SceneManager::instance()->draw();
	compareImages( utest_state, utest_result, app.getWindow(), "eepp-textedit-hebrew" );
}

UTEST( FontRendering, textSizes ) {
	auto win = Engine::instance()->createWindow(
		WindowSettings( 1024, 650, "eepp - Text Sizes", WindowStyle::Default,
						WindowBackend::Default, 32, {}, 1, false, true ) );

	ASSERT_TRUE_MSG( win->isOpen(), "Failed to create Window" );

	Text::TextShaperEnabled = false;

	FontTrueType* font = FontTrueType::New( "NotoSans-Regular" );
	font->loadFromFile( "../assets/fonts/NotoSans-Regular.ttf" );

	FontStyleConfig config;
	config.Font = font;
	config.CharacterSize = 12;
	config.Style = 0;

	String txt( "Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod\n"
				"tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam,\n"
				"quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo\n"
				"consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse\n"
				"cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non\n"
				"proident, sunt in culpa qui officia deserunt mollit anim id est laborum." );

	const auto runTest = [&]() {
		Sizef size = Text::draw( txt, Vector2f::Zero, config );
		EXPECT_EQ( 445, size.getWidth() );
		EXPECT_EQ( 96, size.getHeight() );
		EXPECT_EQ( 445, Text::getTextWidth( txt, config ) );

		Vector2i topPos{ 120, 0 };
		EXPECT_EQ( 19, Text::findCharacterFromPos( topPos, true, config.Font, config.CharacterSize,
												   txt, 0 ) );
		EXPECT_EQ( 19, Text::findCharacterFromPos( topPos, false, config.Font, config.CharacterSize,
												   txt, 0 ) );

		Vector2i startPos{ 120, 7 };
		EXPECT_EQ( 19, Text::findCharacterFromPos( startPos, true, config.Font,
												   config.CharacterSize, txt, 0 ) );
		EXPECT_EQ( 19, Text::findCharacterFromPos( startPos, false, config.Font,
												   config.CharacterSize, txt, 0 ) );

		Vector2i middlePos{ 120, 64 };
		EXPECT_EQ( 242, Text::findCharacterFromPos( middlePos, true, config.Font,
													config.CharacterSize, txt, 0 ) );
		EXPECT_EQ( 242, Text::findCharacterFromPos( middlePos, false, config.Font,
													config.CharacterSize, txt, 0 ) );

		Vector2i endPos{ 120, 103 };
		EXPECT_EQ( 395, Text::findCharacterFromPos( endPos, true, config.Font, config.CharacterSize,
													txt, 0 ) );
		EXPECT_EQ( -1, Text::findCharacterFromPos( endPos, false, config.Font, config.CharacterSize,
												   txt, 0 ) );

		EXPECT_EQ( 18ul, Text::findLastCharPosWithinLength( txt, 120, config ) );
		EXPECT_EQ( 446ul, Text::findLastCharPosWithinLength( txt, 1000, config ) );

		Vector2f pos = Text::findCharacterPos( 19, config.Font, config.CharacterSize, txt, 0 );
		EXPECT_EQ( 120, pos.x );
		EXPECT_EQ( 0, pos.y );

		Text text;
		text.setStyleConfig( config );
		text.setString( txt );
		EXPECT_EQ( 445, text.getTextWidth() );
		EXPECT_EQ( 96, text.getTextHeight() );
		EXPECT_EQ( 446, text.getLocalBounds().getWidth() );
		EXPECT_EQ( 93, text.getLocalBounds().getHeight() );
		EXPECT_EQ( 19, text.findCharacterFromPos( startPos, true ) );
		EXPECT_EQ( 19, text.findCharacterFromPos( startPos, false ) );
		EXPECT_EQ( 242, text.findCharacterFromPos( middlePos, true ) );
		EXPECT_EQ( 242, text.findCharacterFromPos( middlePos, false ) );
		EXPECT_EQ( 395, text.findCharacterFromPos( endPos ) );
		EXPECT_EQ( -1, text.findCharacterFromPos( endPos, false ) );
		pos = text.findCharacterPos( 19 );
		EXPECT_EQ( 120, pos.x );
		EXPECT_EQ( 0, pos.y );
	};

	UTEST_PRINT_STEP( "Text Shaper disabled" );
	{
		BoolScopedOp op( Text::TextShaperEnabled, false );
		runTest();
	}

	UTEST_PRINT_STEP( "Text Shaper enabled" );
	{
		BoolScopedOp op( Text::TextShaperEnabled, true );
		runTest();
	}

	UTEST_PRINT_STEP( "Text Shaper enabled w/o optimizations" );
	{
		BoolScopedOp op( Text::TextShaperEnabled, true );
		BoolScopedOp op2( Text::TextShaperOptimizations, false );
		runTest();
	}

	Engine::destroySingleton();
}

UTEST( FontRendering, textStyles ) {
	auto win = Engine::instance()->createWindow(
		WindowSettings( 1024, 230, "eepp - Text Styles", WindowStyle::Default,
						WindowBackend::Default, 32, {}, 1, false, true ) );

	ASSERT_TRUE_MSG( win->isOpen(), "Failed to create Window" );

	Text::TextShaperEnabled = false;

	FontTrueType* font = FontTrueType::New( "NotoSans-Regular" );
	font->loadFromFile( "../assets/fonts/NotoSans-Regular.ttf" );
	FontFamily::loadFromRegular( font );

	win->setClearColor( RGB( 255, 255, 255 ) );

	FontStyleConfig config;
	config.Font = font;
	config.FontColor = Color::Black;
	config.CharacterSize = 20;
	config.OutlineColor = Color::Black;
	config.ShadowColor = Color::lightgray;

	String txt( "Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod\n"
				"tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam,\n"
				"quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo\n"
				"consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse\n"
				"cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non\n"
				"proident, sunt in culpa qui officia deserunt mollit anim id est laborum." );

	const auto runTest = [&]( std::string_view styleName, Uint32 textAlign ) {
		win->clear();
		Text text;
		text.setStyleConfig( config );
		text.setString( txt );
		text.setAlign( textAlign );
		text.draw( 32, 32 );
		compareImages( utest_state, utest_result, win, "eepp-text-style-" + styleName );
	};

	const auto runTestSuite = [&]( Uint32 style, std::string_view styleName,
								   Uint32 textAlign = TEXT_ALIGN_LEFT ) {
		config.Style = style;

		UTEST_PRINT_STEP( styleName.data() );

		{
			UTEST_PRINT_STEP( "	Text Shaper disabled" );
			BoolScopedOp op( Text::TextShaperEnabled, false );
			runTest( styleName, textAlign );
		}

		{
			UTEST_PRINT_STEP( "	Text Shaper enabled" );
			BoolScopedOp op( Text::TextShaperEnabled, true );
			runTest( styleName, textAlign );

			UTEST_PRINT_STEP( "	Text Shaper enabled w/o optimizations" );
			BoolScopedOp op2( Text::TextShaperOptimizations, false );
			runTest( styleName, textAlign );
		}
	};

	runTestSuite( Text::Regular, "regular" );
	runTestSuite( Text::Bold, "bold" );
	runTestSuite( Text::Italic, "italic" );
	runTestSuite( Text::Underlined, "underline" );
	runTestSuite( Text::StrikeThrough, "strikethrough" );
	runTestSuite( Text::Shadow, "shadow" );
	config.FontColor = Color::White;
	config.OutlineThickness = 1;
	runTestSuite( Text::Regular, "outline" );
	config.FontColor = Color::Black;
	config.OutlineThickness = 0;
	runTestSuite( Text::Regular, "regular-center", TEXT_ALIGN_CENTER );
	runTestSuite( Text::Regular, "regular-right", TEXT_ALIGN_RIGHT );
	runTestSuite( Text::Underlined, "underline-center", TEXT_ALIGN_CENTER );
	runTestSuite( Text::Underlined, "underline-right", TEXT_ALIGN_RIGHT );
	runTestSuite( Text::StrikeThrough, "strikethrough-center", TEXT_ALIGN_CENTER );
	runTestSuite( Text::StrikeThrough, "strikethrough-right", TEXT_ALIGN_RIGHT );

	Engine::destroySingleton();
}

UTEST( FontRendering, emojisWithText ) {
	auto win = Engine::instance()->createWindow(
		WindowSettings( 1024, 230, "eepp - Emojis With Text", WindowStyle::Default,
						WindowBackend::Default, 32, {}, 1, false, true ) );

	ASSERT_TRUE_MSG( win->isOpen(), "Failed to create Window" );

	Text::TextShaperEnabled = false;

	FontTrueType* font = FontTrueType::New( "NotoSans-Regular" );
	font->loadFromFile( "../assets/fonts/NotoSans-Regular.ttf" );
	FontFamily::loadFromRegular( font );

	FontTrueType* fontEmojiColor = FontTrueType::New( "NotoColorEmoji" );
	fontEmojiColor->loadFromFile( "../assets/fonts/NotoColorEmoji.ttf" );

	win->setClearColor( RGB( 255, 255, 255 ) );

	FontStyleConfig config;
	config.Font = font;
	config.FontColor = Color::Black;
	config.CharacterSize = 16;

	String txt(
		R"txt(👻 Lorem ipsum dolor sit amet, 👻 consectetur adipisicing elit, sed do eiusmod🤯 tempor incididunt ut labore et dolore magna
aliqua. Ut enim ad😎 minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat 🤖.
Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur 🧐. Excepteur sint occaecat
cupidatat non proident👽, sunt in culpa qui officia deserunt mollit anim id est laborum. 😀)txt" );

	const auto runTest = [&]() {
		win->clear();
		Text text;
		text.setStyleConfig( config );
		text.setString( txt );
		text.draw( 32, 32 );
		compareImages( utest_state, utest_result, win, "eepp-emojis-with-text" );
	};

	UTEST_PRINT_STEP( "	Text Shaper disabled" );
	{
		BoolScopedOp op( Text::TextShaperEnabled, false );
		runTest();
	}

	UTEST_PRINT_STEP( "	Text Shaper enabled" );
	BoolScopedOp op( Text::TextShaperEnabled, true );
	runTest();

	UTEST_PRINT_STEP( "	Text Shaper enabled w/o optimizations" );
	BoolScopedOp op2( Text::TextShaperOptimizations, false );
	runTest();

	Engine::destroySingleton();
}

UTEST( FontRendering, textSetFillColor ) {
	auto win = Engine::instance()->createWindow(
		WindowSettings( 1024, 230, "eepp - Text Set Fill Color", WindowStyle::Default,
						WindowBackend::Default, 32, {}, 1, false, true ) );

	ASSERT_TRUE_MSG( win->isOpen(), "Failed to create Window" );

	UTEST_PRINT_INFO( GLi->getRenderer().c_str() );

	win->setClearColor( RGB( 230, 230, 230 ) );

	FontTrueType* arabicFont =
		FontTrueType::New( "NotoNaskhArabic-Regular", "assets/fonts/NotoNaskhArabic-Regular.ttf" );

	Text text;
	text.setFont( arabicFont );
	text.setFontSize( 64 );
	text.setAlign( TEXT_ALIGN_CENTER );
	std::string arabicTxtUtf8;
	FileSystem::fileGet( "assets/textfiles/test-arabic-simple.uext", arabicTxtUtf8 );
	String arabicTxt( arabicTxtUtf8 );
	text.setString( arabicTxt );
	text.setFillColor( Color::Black );

	const auto runTest = [&]( std::string_view testName ) {
		win->clear();
		text.draw( 0, win->getHeight() * 0.5f - text.getTextHeight() * 0.5f );
		compareImages( utest_state, utest_result, win,
					   std::string( "eepp-text-set-fill-color-" ) + std::string( testName ) );
	};

	UTEST_PRINT_STEP( "Text Shaper enabled" );
	{
		BoolScopedOp op( Text::TextShaperEnabled, true );

		// Test Vector Fill
		{
			std::vector<Color> colors;
			for ( size_t i = 0; i < arabicTxt.size(); i++ ) {
				// Alternating colors
				if ( i % 3 == 0 )
					colors.push_back( Color::Red );
				else if ( i % 3 == 1 )
					colors.push_back( Color::Green );
				else
					colors.push_back( Color::Blue );
			}
			text.setFillColor( colors );
			runTest( "vector" );
		}

		// Test Range Fill
		{
			text.setFillColor( Color::Black );
			// Color "World" (بالعالم) in Red. It's at the end of the string.
			// "مرحباً" (Hello) is 6 chars + space = 7.
			// "بالعالم" (World) starts at index 7.
			if ( arabicTxt.size() > 7 ) {
				text.setFillColor( Color::Red, 7, arabicTxt.size() );
			}
			runTest( "range" );
		}
	}

	Engine::destroySingleton();
}

UTEST( FontRendering, UITextTest ) {
	const auto runTest = [&]() {
		UIApplication app(
			WindowSettings( 1024, 650, "eepp - UI Text Test", WindowStyle::Default,
							WindowBackend::Default, 32, {}, 1, false, true ),
			UIApplication::Settings( Sys::getProcessPath() + ".." + FileSystem::getOSSlash(), 1 ) );
		FileSystem::changeWorkingDirectory( Sys::getProcessPath() );
		app.getUI()->loadLayoutFromFile( "assets/layouts/ui_text_test.xml" );
		SceneManager::instance()->update();
		SceneManager::instance()->draw();
		compareImages( utest_state, utest_result, app.getWindow(), "eepp-ui-text-test" );
	};

	UTEST_PRINT_STEP( "Text Shaper disabled" );
	{
		BoolScopedOp op( Text::TextShaperEnabled, false );
		runTest();
	}

	UTEST_PRINT_STEP( "Text Shaper enabled" );
	{
		BoolScopedOp op( Text::TextShaperEnabled, true );
		runTest();

		UTEST_PRINT_STEP( "Text Shaper enabled w/o optimizations" );
		BoolScopedOp op2( Text::TextShaperOptimizations, false );
		runTest();
	}
}

UTEST( FontRendering, TextWrap ) {
	FileSystem::changeWorkingDirectory( Sys::getProcessPath() );
	std::string loremIpsum;
	FileSystem::fileGet( "assets/textfiles/lorem-ipsum.uext", loremIpsum );

	const auto runTest = [&]() {
		UIApplication app(
			WindowSettings( 512, 555, "eepp - Text Wrap", WindowStyle::Default,
							WindowBackend::Default, 32, {}, 1, false, true ),
			UIApplication::Settings( Sys::getProcessPath() + ".." + FileSystem::getOSSlash(), 1 ) );
		FileSystem::changeWorkingDirectory( Sys::getProcessPath() );
		app.getWindow()->setClearColor( RGB( 255, 255, 255 ) );
		app.getWindow()->clear();
		Vector2f pos{ 5, 5 };
		Primitives p;
		p.setColor( Color::Red );
		p.drawRectangle( Rectf( pos - 1.f, { 1, 546 } ) );
		p.drawRectangle( Rectf( pos - 1.f, { 501, 1 } ) );
		p.drawRectangle( Rectf( { pos.x - 1.f, 544 + pos.y }, { 502, 1 } ) );
		p.drawRectangle( Rectf( { 500 + pos.x, pos.y - 1.f }, { 1, 546 } ) );

		Text text;
		text.setFont( app.getUI()->getUIThemeManager()->getDefaultFont() );
		text.setFontSize( 16 );
		text.setColor( Color::Black );
		text.setString( loremIpsum );
		text.wrapText( 500 );
		text.draw( pos.x, pos.y );

		text.setAlign( TEXT_ALIGN_CENTER );
		pos.y += text.getTextHeight() + 8;
		text.draw( pos.x, pos.y );

		pos.y += text.getTextHeight() + 8;
		text.setAlign( TEXT_ALIGN_RIGHT );
		text.draw( pos.x, pos.y );

		compareImages( utest_state, utest_result, app.getWindow(), "eepp-text-wrap" );
	};

	UTEST_PRINT_STEP( "Text Shaper disabled" );
	{
		BoolScopedOp op( Text::TextShaperEnabled, false );
		runTest();
	}

	UTEST_PRINT_STEP( "Text Shaper enabled" );
	{
		BoolScopedOp op( Text::TextShaperEnabled, true );
		runTest();

		UTEST_PRINT_STEP( "Text Shaper enabled w/o optimizations" );
		BoolScopedOp op2( Text::TextShaperOptimizations, false );
		runTest();
	}
}