add fullscreen mode

src/common/emulatorConfig.cpp

@@ -33,6 +33,10 @@ uint32_t GetScreenHeight() {
 	return g_config->screen_height;
 }
 
+bool FullscreenEnabled() {
+	return g_config->fullscreen_enabled;
+}
+
 uint32_t GetVblankFrequency() {
 	return std::clamp(g_config->vblank_frequency, 30u, 360u);
 }

src/common/emulatorConfig.h

@@ -24,6 +24,7 @@ constexpr uint32_t MAX_CONSOLE_LANGUAGE     = 29;
 struct ConfigOptions {
 	uint32_t               screen_width                = 1280;
 	uint32_t               screen_height               = 720;
+	bool                   fullscreen_enabled          = false;
 	uint32_t               vblank_frequency            = 60;
 	uint32_t               console_language            = DEFAULT_CONSOLE_LANGUAGE;
 	bool                   vulkan_validation_enabled   = false;
@@ -46,6 +47,7 @@ void Load(const ConfigOptions& cfg);
 
 uint32_t GetScreenWidth();
 uint32_t GetScreenHeight();
+bool     FullscreenEnabled();
 uint32_t GetVblankFrequency();
 uint32_t GetConsoleLanguage();
 bool     VulkanValidationEnabled();

src/graphics/presentation/window/window.cpp

@@ -799,6 +799,9 @@ static void WindowCreate(WindowContext& context) {
 	LOGF("WindowCreate(): width = %d, height = %d\n", width, height);
 
 	uint32_t window_flags = KYTY_SDL_WINDOW_FLAGS;
+	if (Config::FullscreenEnabled()) {
+		window_flags |= static_cast<uint32_t>(SDL_WINDOW_FULLSCREEN_DESKTOP);
+	}
 #if defined(__APPLE__)
 	// macOS 26 window chrome (CoreUI asset decode, SwiftUI titlebar) has been observed
 	// throwing NSExceptions under Rosetta during the first CATransaction commit. A

src/launcher/forms/configuration_edit_dialog.ui

@@ -78,6 +78,16 @@
            </property>
           </widget>
          </item>
+         <item row="2" column="0">
+          <widget class="QCheckBox" name="checkBox_fullscreen">
+           <property name="toolTip">
+            <string>Run in borderless desktop fullscreen</string>
+           </property>
+           <property name="text">
+            <string>Fullscreen</string>
+           </property>
+          </widget>
+         </item>
         </layout>
        </widget>
       </item>

src/launcher/include/configuration.h

@@ -85,6 +85,7 @@ public:
 	QString    game_comment;
 
 	Resolution             screen_resolution           = Resolution::R1280X720;
+	bool                   fullscreen_enabled          = false;
 	int                    vblank_frequency            = 60;
 	int                    console_language            = DEFAULT_CONSOLE_LANGUAGE;
 	bool                   vulkan_validation_enabled   = true;
@@ -103,6 +104,7 @@ public:
 
 	void CopyEmulatorSettingsFrom(const Configuration& other) {
 		screen_resolution           = other.screen_resolution;
+		fullscreen_enabled          = other.fullscreen_enabled;
 		vblank_frequency            = other.vblank_frequency;
 		console_language            = other.console_language;
 		vulkan_validation_enabled   = other.vulkan_validation_enabled;
@@ -138,6 +140,7 @@ public:
 		KYTY_CFG_SET(game_path);
 		KYTY_CFG_SET(custom_settings);
 		KYTY_CFG_SET(screen_resolution);
+		KYTY_CFG_SET(fullscreen_enabled);
 		KYTY_CFG_SET(vblank_frequency);
 		KYTY_CFG_SET(console_language);
 		KYTY_CFG_SET(vulkan_validation_enabled);
@@ -160,6 +163,7 @@ public:
 		KYTY_CFG_GET(game_path);
 		KYTY_CFG_GET(custom_settings);
 		KYTY_CFG_GET(screen_resolution);
+		KYTY_CFG_GET(fullscreen_enabled);
 		vblank_frequency = s->value("vblank_frequency", vblank_frequency).toInt();
 		console_language = s->value("console_language", console_language).toInt();
 		if (console_language < 0 || console_language > MAX_CONSOLE_LANGUAGE) {

src/launcher/src/configurationEditDialog.cpp

@@ -153,6 +153,7 @@ static void ListInit(QComboBox* combo, T value) {
 
 void ConfigurationEditDialog::Init(const Configuration& info) {
 	ListInit(m_ui->comboBox_screen_resolution, info.screen_resolution);
+	m_ui->checkBox_fullscreen->setChecked(info.fullscreen_enabled);
 	m_ui->spinBox_vblank_frequency->setValue(info.vblank_frequency);
 	m_ui->comboBox_console_language->clear();
 	m_ui->comboBox_console_language->addItems(CONSOLE_LANGUAGE_NAMES);
@@ -279,6 +280,7 @@ void ConfigurationEditDialog::moveEvent(QMoveEvent* event) {
 static void UpdateInfo(Configuration& info, Ui::ConfigurationEditDialog& ui) {
 	info.screen_resolution =
 	    TextToEnum<Configuration::Resolution>(ui.comboBox_screen_resolution->currentText());
+	info.fullscreen_enabled        = ui.checkBox_fullscreen->isChecked();
 	info.vblank_frequency          = ui.spinBox_vblank_frequency->value();
 	info.console_language          = ui.comboBox_console_language->currentIndex();
 	info.vulkan_validation_enabled = ui.checkBox_vulkan_validation->isChecked();

src/launcher/src/mainDialog.cpp

@@ -204,6 +204,9 @@ static QStringList CreateEmulatorArgs(const Configuration& info) {
 
 	args << "--screen-width" << r.at(0);
 	args << "--screen-height" << r.at(1);
+	if (info.fullscreen_enabled) {
+		args << "--fullscreen";
+	}
 	args << "--vblank-frequency" << QString::number(info.vblank_frequency);
 	args << "--console-language" << QString::number(info.console_language);
 	args << "--vulkan-validation" << BoolArg(info.vulkan_validation_enabled);

src/main.cpp

@@ -47,6 +47,7 @@ static void PrintUsage() {
 	    "  --game-patch <json>                  Validated patch plan to apply before entry.\n");
 	::printf("  --screen-width <num>                 Window width. Default: 1280.\n");
 	::printf("  --screen-height <num>                Window height. Default: 720.\n");
+	::printf("  --fullscreen                         Run in borderless desktop fullscreen.\n");
 	::printf("  --vblank-frequency <num>             Virtual vblank frequency. Default: 60.\n");
 	::printf("  --console-language <0-29>            Console language. Default: 1 (English US).\n");
 	::printf("  --vulkan-validation <true|false>     Enable Vulkan validation.\n");
@@ -131,6 +132,11 @@ static bool ParseArgs(int argc, char* argv[], RunOptions& options, bool& show_he
 			continue;
 		}
 
+		if (arg == "--fullscreen") {
+			options.config.fullscreen_enabled = true;
+			continue;
+		}
+
 		if (!Common::StartsWith(arg, "--")) {
 			::printf("game input must be provided with --game\n");
 			return false;