3 files changed, 40 insertions, 4 deletions

diff --git a/src/yuzu_cmd/emu_window/emu_window_sdl2.cpp b/src/yuzu_cmd/emu_window/emu_window_sdl2.cpp
index 3d7cd06a4..36d40a9b5 100644
--- a/src/yuzu_cmd/emu_window/emu_window_sdl2.cpp
+++ b/src/yuzu_cmd/emu_window/emu_window_sdl2.cpp
@@ -56,7 +56,28 @@ void EmuWindow_SDL2::OnResize() {
     UpdateCurrentFramebufferLayout(width, height);
 }
 
-EmuWindow_SDL2::EmuWindow_SDL2() {
+void EmuWindow_SDL2::Fullscreen() {
+    if (SDL_SetWindowFullscreen(render_window, SDL_WINDOW_FULLSCREEN) == 0) {
+        return;
+    }
+
+    NGLOG_ERROR(Frontend, "Fullscreening failed: {}", SDL_GetError());
+
+    // Try a different fullscreening method
+    NGLOG_INFO(Frontend, "Attempting to use borderless fullscreen...");
+    if (SDL_SetWindowFullscreen(render_window, SDL_WINDOW_FULLSCREEN_DESKTOP) == 0) {
+        return;
+    }
+
+    NGLOG_ERROR(Frontend, "Borderless fullscreening failed: {}", SDL_GetError());
+
+    // Fallback algorithm: Maximise window.
+    // Works on all systems (unless something is seriously wrong), so no fallback for this one.
+    NGLOG_INFO(Frontend, "Falling back on a maximised window...");
+    SDL_MaximizeWindow(render_window);
+}
+
+EmuWindow_SDL2::EmuWindow_SDL2(bool fullscreen) {
     InputCommon::Init();
 
     SDL_SetMainReady();
@@ -90,6 +111,10 @@ EmuWindow_SDL2::EmuWindow_SDL2() {
         exit(1);
     }
 
+    if (fullscreen) {
+        Fullscreen();
+    }
+
     gl_context = SDL_GL_CreateContext(render_window);
 
     if (gl_context == nullptr) {
diff --git a/src/yuzu_cmd/emu_window/emu_window_sdl2.h b/src/yuzu_cmd/emu_window/emu_window_sdl2.h
index 3664d2fbe..7d5cfffb6 100644
--- a/src/yuzu_cmd/emu_window/emu_window_sdl2.h
+++ b/src/yuzu_cmd/emu_window/emu_window_sdl2.h
@@ -12,7 +12,7 @@ struct SDL_Window;
 
 class EmuWindow_SDL2 : public EmuWindow {
 public:
-    EmuWindow_SDL2();
+    explicit EmuWindow_SDL2(bool fullscreen);
     ~EmuWindow_SDL2();
 
     /// Swap buffers to display the next frame
@@ -43,6 +43,9 @@ private:
     /// Called by PollEvents when any event that may cause the window to be resized occurs
     void OnResize();
 
+    /// Called when user passes the fullscreen parameter flag
+    void Fullscreen();
+
     /// Called when a configuration change affects the minimal size of the window
     void OnMinimalClientAreaChangeRequest(
         const std::pair<unsigned, unsigned>& minimal_size) override;
diff --git a/src/yuzu_cmd/yuzu.cpp b/src/yuzu_cmd/yuzu.cpp
index 261312f62..0a4644500 100644
--- a/src/yuzu_cmd/yuzu.cpp
+++ b/src/yuzu_cmd/yuzu.cpp
@@ -41,6 +41,7 @@ static void PrintHelp(const char* argv0) {
     std::cout << "Usage: " << argv0
               << " [options] <filename>\n"
                  "-g, --gdbport=NUMBER  Enable gdb stub on port NUMBER\n"
+                 "-f, --fullscreen     Start in fullscreen mode\n"
                  "-h, --help            Display this help and exit\n"
                  "-v, --version         Output version information and exit\n";
 }
@@ -67,15 +68,18 @@ int main(int argc, char** argv) {
 #endif
     std::string filepath;
 
+    bool fullscreen = false;
+
     static struct option long_options[] = {
         {"gdbport", required_argument, 0, 'g'},
+        {"fullscreen", no_argument, 0, 'f'},
         {"help", no_argument, 0, 'h'},
         {"version", no_argument, 0, 'v'},
         {0, 0, 0, 0},
     };
 
     while (optind < argc) {
-        char arg = getopt_long(argc, argv, "g:hv", long_options, &option_index);
+        char arg = getopt_long(argc, argv, "g:fhv", long_options, &option_index);
         if (arg != -1) {
             switch (arg) {
             case 'g':
@@ -89,6 +93,10 @@ int main(int argc, char** argv) {
                     exit(1);
                 }
                 break;
+            case 'f':
+                fullscreen = true;
+                NGLOG_INFO(Frontend, "Starting in fullscreen mode...");
+                break;
             case 'h':
                 PrintHelp(argv[0]);
                 return 0;
@@ -128,7 +136,7 @@ int main(int argc, char** argv) {
     Settings::values.use_gdbstub = use_gdbstub;
     Settings::Apply();
 
-    std::unique_ptr<EmuWindow_SDL2> emu_window{std::make_unique<EmuWindow_SDL2>()};
+    std::unique_ptr<EmuWindow_SDL2> emu_window{std::make_unique<EmuWindow_SDL2>(fullscreen)};
 
     Core::System& system{Core::System::GetInstance()};