add menu setting to toggle window decorations

config.def.h

@@ -125,6 +125,9 @@ static const unsigned fullscreen_y = 0;
  */
 static const unsigned window_opacity = 100;
 
+/* Whether to show the usual window decorations like border, titlebar etc. */
+static const bool window_decorations = true;
+
 #if defined(RARCH_CONSOLE) || defined(__APPLE__)
 static const bool load_dummy_on_core_shutdown = false;
 #else

configuration.c

@@ -1379,6 +1379,7 @@ static struct config_bool_setting *populate_settings_bool(settings_t *settings,
    SETTING_BOOL("screenshots_in_content_dir",    &settings->bools.screenshots_in_content_dir, true, default_screenshots_in_content_dir, false);
 
    SETTING_BOOL("video_msg_bgcolor_enable",      &settings->bools.video_msg_bgcolor_enable, true, message_bgcolor_enable, false);
+   SETTING_BOOL("video_window_show_decorations", &settings->bools.video_window_show_decorations, true, window_decorations, false);
 
    *size = count;
 

configuration.h

@@ -254,6 +254,7 @@ typedef struct settings
       bool bluetooth_enable;
 
       bool automatically_add_content_to_playlist;
+      bool video_window_show_decorations;
    } bools;
 
    struct

gfx/common/win32_common.c

@@ -817,8 +817,11 @@ bool win32_window_create(void *data, unsigned style,
    video_driver_window_set((uintptr_t)main_window.hwnd);
 
 #if defined(_WIN32_WINNT) && _WIN32_WINNT >= 0x0500 /* 2K */
+   if (!settings->bools.video_window_show_decorations)
+      SetWindowLongPtr(main_window.hwnd, GWL_STYLE, WS_POPUP);
+
    /* Windows 2000 and above use layered windows to enable transparency */
-   if(settings->uints.video_window_opacity < 100)
+   if (settings->uints.video_window_opacity < 100)
    {
       SetWindowLongPtr(main_window.hwnd,
            GWL_EXSTYLE,

gfx/display_servers/dispserv_null.c

@@ -48,6 +48,7 @@ const video_display_server_t dispserv_null = {
    null_display_server_destroy,
    null_set_window_opacity,
    null_set_window_progress,
+   NULL,
    "null"
 };
 

gfx/display_servers/dispserv_win32.c

@@ -54,6 +54,7 @@ typedef struct
 {
    unsigned opacity;
    int progress;
+   bool decorations;
 } dispserv_win32_t;
 
 /*
@@ -180,11 +181,23 @@ static bool win32_set_window_progress(void *data, int progress, bool finished)
    return ret;
 }
 
+static bool win32_set_window_decorations(void *data, bool on)
+{
+   dispserv_win32_t *serv = (dispserv_win32_t*)data;
+
+   serv->decorations = on;
+
+   /* menu_setting performs a reinit instead to properly apply decoration changes */
+
+   return true;
+}
+
 const video_display_server_t dispserv_win32 = {
    win32_display_server_init,
    win32_display_server_destroy,
    win32_set_window_opacity,
    win32_set_window_progress,
+   win32_set_window_decorations,
    "win32"
 };
 

gfx/display_servers/dispserv_x11.c

@@ -22,6 +22,7 @@
 typedef struct
 {
    unsigned opacity;
+   bool decorations;
 } dispserv_x11_t;
 
 static void* x11_display_server_init(void)
@@ -47,7 +48,6 @@ static bool x11_set_window_opacity(void *data, unsigned opacity)
    dispserv_x11_t *serv = (dispserv_x11_t*)data;
    Atom net_wm_opacity  = XInternAtom(g_x11_dpy, "_NET_WM_WINDOW_OPACITY", False);
    Atom cardinal        = XInternAtom(g_x11_dpy, "CARDINAL", False);
-   settings_t *settings = config_get_ptr();
 
    serv->opacity        = opacity;
 
@@ -61,11 +61,23 @@ static bool x11_set_window_opacity(void *data, unsigned opacity)
    return true;
 }
 
+static bool x11_set_window_decorations(void *data, bool on)
+{
+   dispserv_x11_t *serv = (dispserv_x11_t*)data;
+
+   serv->decorations = on;
+
+   /* menu_setting performs a reinit instead to properly apply decoration changes */
+
+   return true;
+}
+
 const video_display_server_t dispserv_x11 = {
    x11_display_server_init,
    x11_display_server_destroy,
    x11_set_window_opacity,
    NULL,
+   x11_set_window_decorations,
    "x11"
 };
 

gfx/drivers_context/x_ctx.c

@@ -113,6 +113,16 @@ static enum gfx_ctx_api x_api                 = GFX_CTX_NONE;
 
 static gfx_ctx_x_data_t *current_context_data = NULL;
 
+typedef struct Hints
+{
+   unsigned long flags;
+   unsigned long functions;
+   unsigned long decorations;
+   long          inputMode;
+   unsigned long status;
+} Hints;
+
+/* We use long because X11 wants 32-bit pixels for 32-bit systems and 64 for 64... */
 const unsigned long retroarch_icon_data[] = {
    16, 16,
    0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000,
@@ -623,7 +633,6 @@ static bool gfx_ctx_x_set_video_mode(void *data,
    int (*old_handler)(Display*, XErrorEvent*) = NULL;
    gfx_ctx_x_data_t *x       = (gfx_ctx_x_data_t*)data;
    Atom net_wm_icon = XInternAtom(g_x11_dpy, "_NET_WM_ICON", False);
-   Atom net_wm_opacity = XInternAtom(g_x11_dpy, "_NET_WM_WINDOW_OPACITY", False);
    Atom cardinal = XInternAtom(g_x11_dpy, "CARDINAL", False);
    settings_t *settings = config_get_ptr();
    unsigned opacity = settings->uints.video_window_opacity * ((unsigned)-1 / 100.0);
@@ -717,7 +726,23 @@ static bool gfx_ctx_x_set_video_mode(void *data,
    XChangeProperty(g_x11_dpy, g_x11_win, net_wm_icon, cardinal, 32, PropModeReplace, (const unsigned char*)retroarch_icon_data, sizeof(retroarch_icon_data) / sizeof(*retroarch_icon_data));
 
    if (opacity < (unsigned)-1)
+   {
+      Atom net_wm_opacity = XInternAtom(g_x11_dpy, "_NET_WM_WINDOW_OPACITY", False);
       XChangeProperty(g_x11_dpy, g_x11_win, net_wm_opacity, cardinal, 32, PropModeReplace, (const unsigned char*)&opacity, 1);
+   }
+
+   if (!settings->bools.video_window_show_decorations)
+   {
+      /* We could have just set _NET_WM_WINDOW_TYPE_DOCK instead, but that removes the window from any taskbar/panel,
+       * so we are forced to use the old motif hints method. */
+      Hints hints;
+      Atom property = XInternAtom(g_x11_dpy, "_MOTIF_WM_HINTS", False);
+
+      hints.flags = 2;
+      hints.decorations = 0;
+
+      XChangeProperty(g_x11_dpy, g_x11_win, property, property, 32, PropModeReplace, (const unsigned char*)&hints, 5);
+   }
 
    switch (x_api)
    {

gfx/video_display_server.c

@@ -74,3 +74,10 @@ bool video_display_server_set_window_progress(int progress, bool finished)
       return current_display_server->set_window_progress(current_display_server_data, progress, finished);
    return false;
 }
+
+bool video_display_server_set_window_decorations(bool on)
+{
+   if (current_display_server && current_display_server->set_window_decorations)
+      return current_display_server->set_window_decorations(current_display_server_data, on);
+   return false;
+}

gfx/video_display_server.h

@@ -29,6 +29,7 @@ typedef struct video_display_server
    void (*destroy)(void *data);
    bool (*set_window_opacity)(void *data, unsigned opacity);
    bool (*set_window_progress)(void *data, int progress, bool finished);
+   bool (*set_window_decorations)(void *data, bool on);
    const char *ident;
 } video_display_server_t;
 
@@ -36,6 +37,7 @@ void* video_display_server_init(void);
 void video_display_server_destroy(void);
 bool video_display_server_set_window_opacity(unsigned opacity);
 bool video_display_server_set_window_progress(int progress, bool finished);
+bool video_display_server_set_window_decorations(bool on);
 
 extern const video_display_server_t dispserv_win32;
 extern const video_display_server_t dispserv_x11;

intl/msg_hash_ja.h

@@ -3311,3 +3311,5 @@ MSG_HASH(MENU_ENUM_SUBLABEL_AUDIO_RESAMPLER_QUALITY,
       "Lower this value to favor performance/lower latency over audio quality, increase if you want better audio quality at the expense of performance/lower latency.")
 MSG_HASH(MENU_ENUM_LABEL_VALUE_SHADER_WATCH_FOR_CHANGES,
       "シェーダーファイルの変更を監視")
+MSG_HASH(MENU_ENUM_LABEL_VALUE_VIDEO_WINDOW_SHOW_DECORATIONS,
+      "ウィンドウ枠を表示")

intl/msg_hash_lbl.h

@@ -1437,3 +1437,5 @@ MSG_HASH(MENU_ENUM_LABEL_INPUT_DRIVER_UDEV,
       "udev")
 MSG_HASH(MENU_ENUM_LABEL_INPUT_DRIVER_LINUXRAW,
       "linuxraw")
+MSG_HASH(MENU_ENUM_LABEL_VIDEO_WINDOW_SHOW_DECORATIONS,
+      "video_window_show_decorations")

intl/msg_hash_us.h

@@ -3415,3 +3415,5 @@ MSG_HASH(MENU_ENUM_LABEL_VALUE_SHADER_WATCH_FOR_CHANGES,
       "Watch shader files for changes")
 MSG_HASH(MENU_ENUM_SUBLABEL_SHADER_WATCH_FOR_CHANGES,
       "Auto-apply changes made to shader files on disk.")
+MSG_HASH(MENU_ENUM_LABEL_VALUE_VIDEO_WINDOW_SHOW_DECORATIONS,
+      "Show Window Decorations")

menu/menu_displaylist.c

@@ -5829,6 +5829,9 @@ bool menu_displaylist_ctl(enum menu_displaylist_ctl_state type, void *data)
          menu_displaylist_parse_settings_enum(menu, info,
                MENU_ENUM_LABEL_VIDEO_WINDOW_OPACITY,
                PARSE_ONLY_UINT, false);
+         menu_displaylist_parse_settings_enum(menu, info,
+               MENU_ENUM_LABEL_VIDEO_WINDOW_SHOW_DECORATIONS,
+               PARSE_ONLY_BOOL, false);
          menu_displaylist_parse_settings_enum(menu, info,
                MENU_ENUM_LABEL_VIDEO_SCALE_INTEGER,
                PARSE_ONLY_BOOL, false);

menu/menu_setting.c

@@ -1854,6 +1854,9 @@ void general_write_handler(void *data)
       case MENU_ENUM_LABEL_VIDEO_WINDOW_OPACITY:
          video_display_server_set_window_opacity(settings->uints.video_window_opacity);
          break;
+      case MENU_ENUM_LABEL_VIDEO_WINDOW_SHOW_DECORATIONS:
+         video_display_server_set_window_decorations(settings->bools.video_window_show_decorations);
+         break;
       default:
          break;
    }
@@ -3663,6 +3666,22 @@ static bool setting_append_list(
                settings_data_list_current_add_flags(list, list_info, SD_FLAG_LAKKA_ADVANCED);
             }
 
+            CONFIG_BOOL(
+                  list, list_info,
+                  &settings->bools.video_window_show_decorations,
+                  MENU_ENUM_LABEL_VIDEO_WINDOW_SHOW_DECORATIONS,
+                  MENU_ENUM_LABEL_VALUE_VIDEO_WINDOW_SHOW_DECORATIONS,
+                  window_decorations,
+                  MENU_ENUM_LABEL_VALUE_OFF,
+                  MENU_ENUM_LABEL_VALUE_ON,
+                  &group_info,
+                  &subgroup_info,
+                  parent_group,
+                  general_write_handler,
+                  general_read_handler,
+                  SD_FLAG_NONE);
+            menu_settings_list_current_add_cmd(list, list_info, CMD_EVENT_REINIT);
+
             CONFIG_BOOL(
                   list, list_info,
                   &settings->bools.video_scale_integer,

msg_hash.h

@@ -1734,6 +1734,7 @@ enum msg_hash_enums
 
    MENU_LABEL(NETPLAY_USE_MITM_SERVER),
    MENU_LABEL(NETPLAY_MITM_SERVER),
+   MENU_LABEL(VIDEO_WINDOW_SHOW_DECORATIONS),
 
    MSG_LAST
 };

retroarch.cfg

@@ -152,6 +152,12 @@
 # If fullscreen, prefer using a windowed fullscreen mode.
 # video_windowed_fullscreen = true
 
+# Percentage of opacity to use for the window (100 is completely opaque).
+# video_window_opacity = 100
+
+# Whether to enable the default window decorations like border, titlebar etc.
+# video_window_show_decorations = true
+
 # Which monitor to prefer. 0 (default) means no particular monitor is preferred, 1 and up (1 being first monitor),
 # suggests RetroArch to use that particular monitor.
 # video_monitor_index = 0