add menu setting for window opacity, includes generic display server interface

Makefile.common

@@ -202,6 +202,7 @@ OBJ += frontend/frontend.o \
        $(LIBRETRO_COMM_DIR)/audio/audio_mixer.o \
        input/input_driver.o \
        gfx/video_coord_array.o \
+       gfx/video_display_server.o \
        gfx/video_driver.o \
        camera/camera_driver.o \
        wifi/wifi_driver.o \
@@ -248,6 +249,7 @@ OBJ += frontend/frontend.o \
        camera/drivers/nullcamera.o \
        wifi/drivers/nullwifi.o \
        gfx/drivers/nullgfx.o \
+       gfx/display_servers/dispserv_null.o \
        audio/drivers/nullaudio.o \
        input/drivers/nullinput.o \
        input/drivers_hid/null_hid.o \
@@ -1551,6 +1553,7 @@ ifneq ($(findstring Win32,$(OS)),)
    OBJ += gfx/drivers/gdi_gfx.o \
           gfx/drivers_context/gdi_ctx.o \
           gfx/drivers_font/gdi_font.o \
+          gfx/display_servers/dispserv_win32.o \
           menu/drivers_display/menu_display_gdi.o
 
    LIBS += -lmsimg32 -lhid -lsetupapi

config.def.h

@@ -115,6 +115,11 @@ static const unsigned window_y = 0;
 static const unsigned fullscreen_x = 0;
 static const unsigned fullscreen_y = 0;
 
+/* Amount of transparency to use for the main window.
+ * 1 is the most transparent while 100 is opaque.
+ */
+static const unsigned window_opacity = 100;
+
 #if defined(RARCH_CONSOLE) || defined(__APPLE__)
 static const bool load_dummy_on_core_shutdown = false;
 #else

configuration.c

@@ -1378,6 +1378,7 @@ static struct config_uint_setting *populate_settings_uint(settings_t *settings,
    SETTING_UINT("video_fullscreen_y",           &settings->uints.video_fullscreen_y,  true, fullscreen_y, false);
    SETTING_UINT("video_window_x",               &settings->uints.video_window_x,  true, fullscreen_x, false);
    SETTING_UINT("video_window_y",               &settings->uints.video_window_y,  true, fullscreen_y, false);
+   SETTING_UINT("video_window_opacity",         &settings->uints.video_window_opacity, true, window_opacity, false);
 #ifdef HAVE_COMMAND
    SETTING_UINT("network_cmd_port",             &settings->uints.network_cmd_port,    true, network_cmd_port, false);
 #endif

configuration.h

@@ -325,6 +325,7 @@ typedef struct settings
       unsigned keymapper_port;
       unsigned video_window_x;
       unsigned video_window_y;
+      unsigned video_window_opacity;
       unsigned video_monitor_index;
       unsigned video_fullscreen_x;
       unsigned video_fullscreen_y;

gfx/common/win32_common.c

@@ -45,6 +45,7 @@
 #include "../../input/input_driver.h"
 #include "../../input/input_keymaps.h"
 #include "../video_thread_wrapper.h"
+#include "../video_display_server.h"
 #include <shellapi.h>
 
 #ifdef HAVE_MENU
@@ -742,6 +743,7 @@ bool win32_window_create(void *data, unsigned style,
       RECT *mon_rect, unsigned width,
       unsigned height, bool fullscreen)
 {
+   settings_t *settings  = config_get_ptr();
 #ifndef _XBOX
    main_window.hwnd = CreateWindowEx(0,
          "RetroArch", "RetroArch",
@@ -756,6 +758,14 @@ bool win32_window_create(void *data, unsigned style,
    video_driver_display_type_set(RARCH_DISPLAY_WIN32);
    video_driver_display_set(0);
    video_driver_window_set((uintptr_t)main_window.hwnd);
+
+#if defined(_WIN32_WINNT) && _WIN32_WINNT >= 0x0500
+   /* Windows 2000 and above use layered windows to enable transparency */
+   SetWindowLongPtr(main_window.hwnd,
+        GWL_EXSTYLE,
+        GetWindowLongPtr(main_window.hwnd, GWL_EXSTYLE) | WS_EX_LAYERED);
+   SetLayeredWindowAttributes(main_window.hwnd, 0, (255 * settings->uints.video_window_opacity) / 100, LWA_ALPHA);
+#endif
 #endif
    return true;
 }

gfx/display_servers/dispserv_null.c

@@ -0,0 +1,43 @@
+/*  RetroArch - A frontend for libretro.
+ *  Copyright (C) 2010-2014 - Hans-Kristian Arntzen
+ *  Copyright (C) 2011-2017 - Daniel De Matteis
+ *  Copyright (C) 2016-2017 - Brad Parker
+ *
+ *  RetroArch is free software: you can redistribute it and/or modify it under the terms
+ *  of the GNU General Public License as published by the Free Software Found-
+ *  ation, either version 3 of the License, or (at your option) any later version.
+ *
+ *  RetroArch is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
+ *  without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
+ *  PURPOSE.  See the GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License along with RetroArch.
+ *  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "../video_display_server.h"
+
+static void* null_display_server_init()
+{
+   return NULL;
+}
+
+static void null_display_server_destroy()
+{
+
+}
+
+static bool null_set_window_opacity(void *data, unsigned opacity)
+{
+   (void)data;
+   (void)opacity;
+   return true;
+}
+
+const video_display_server_t dispserv_null = {
+   null_display_server_init,
+   null_display_server_destroy,
+   null_set_window_opacity,
+   "null"
+};
+

gfx/display_servers/dispserv_win32.c

@@ -0,0 +1,60 @@
+/*  RetroArch - A frontend for libretro.
+ *  Copyright (C) 2010-2014 - Hans-Kristian Arntzen
+ *  Copyright (C) 2011-2017 - Daniel De Matteis
+ *  Copyright (C) 2016-2017 - Brad Parker
+ *
+ *  RetroArch is free software: you can redistribute it and/or modify it under the terms
+ *  of the GNU General Public License as published by the Free Software Found-
+ *  ation, either version 3 of the License, or (at your option) any later version.
+ *
+ *  RetroArch is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
+ *  without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
+ *  PURPOSE.  See the GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License along with RetroArch.
+ *  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <windows.h>
+#include "../video_display_server.h"
+#include "../common/win32_common.h"
+
+typedef struct
+{
+   unsigned opacity;
+} dispserv_win32_t;
+
+static void* win32_display_server_init()
+{
+   dispserv_win32_t *dispserv = calloc(1, sizeof(*dispserv));
+
+   return dispserv;
+}
+
+static void win32_display_server_destroy()
+{
+
+}
+
+static bool win32_set_window_opacity(void *data, unsigned opacity)
+{
+   HWND hwnd = win32_get_window();
+   dispserv_win32_t *serv = (dispserv_win32_t*)data;
+
+   serv->opacity = opacity;
+
+#if defined(_WIN32_WINNT) && _WIN32_WINNT >= 0x0500
+   /* Set window transparency on Windows 2000 and above */
+   return SetLayeredWindowAttributes(hwnd, 0, opacity, LWA_ALPHA);
+#else
+   return false;
+#endif
+}
+
+const video_display_server_t dispserv_win32 = {
+   win32_display_server_init,
+   win32_display_server_destroy,
+   win32_set_window_opacity,
+   "win32"
+};
+

gfx/video_display_server.c

@@ -0,0 +1,55 @@
+/*  RetroArch - A frontend for libretro.
+ *  Copyright (C) 2010-2014 - Hans-Kristian Arntzen
+ *  Copyright (C) 2011-2017 - Daniel De Matteis
+ *  Copyright (C) 2016-2017 - Brad Parker
+ *
+ *  RetroArch is free software: you can redistribute it and/or modify it under the terms
+ *  of the GNU General Public License as published by the Free Software Found-
+ *  ation, either version 3 of the License, or (at your option) any later version.
+ *
+ *  RetroArch is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
+ *  without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
+ *  PURPOSE.  See the GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License along with RetroArch.
+ *  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <stdio.h>
+#include "video_display_server.h"
+#include "video_driver.h"
+#include "../verbosity.h"
+
+static const video_display_server_t *current_display_server = NULL;
+static void *current_display_server_data = NULL;
+
+void* video_display_server_init()
+{
+   enum rarch_display_type type = video_driver_display_type_get();
+
+   switch (type)
+   {
+      case RARCH_DISPLAY_WIN32:
+         current_display_server = &dispserv_win32;
+         break;
+      default:
+         current_display_server = &dispserv_null;
+         break;
+   }
+
+   current_display_server_data = current_display_server->init();
+
+   RARCH_LOG("[Video]: Found display server: %s\n", current_display_server->ident);
+
+   return current_display_server_data;
+}
+
+void video_display_server_destroy()
+{
+
+}
+
+bool video_display_server_set_window_opacity(unsigned opacity)
+{
+   return current_display_server->set_window_opacity(current_display_server_data, opacity);
+}

gfx/video_display_server.h

@@ -0,0 +1,43 @@
+/*  RetroArch - A frontend for libretro.
+ *  Copyright (C) 2010-2014 - Hans-Kristian Arntzen
+ *  Copyright (C) 2011-2017 - Daniel De Matteis
+ *  Copyright (C) 2016-2017 - Brad Parker
+ *
+ *  RetroArch is free software: you can redistribute it and/or modify it under the terms
+ *  of the GNU General Public License as published by the Free Software Found-
+ *  ation, either version 3 of the License, or (at your option) any later version.
+ *
+ *  RetroArch is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
+ *  without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
+ *  PURPOSE.  See the GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License along with RetroArch.
+ *  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef __VIDEO_DISPLAY_SERVER__H
+#define __VIDEO_DISPLAY_SERVER__H
+
+#include <retro_common_api.h>
+#include <boolean.h>
+
+RETRO_BEGIN_DECLS
+
+typedef struct video_display_server
+{
+   void *(*init)(void);
+   void (*destroy)(void);
+   bool (*set_window_opacity)(void *data, unsigned opacity);
+   const char *ident;
+} video_display_server_t;
+
+void* video_display_server_init(void);
+void video_display_server_destroy(void);
+bool video_display_server_set_window_opacity(unsigned opacity);
+
+extern const video_display_server_t dispserv_win32;
+extern const video_display_server_t dispserv_null;
+
+RETRO_END_DECLS
+
+#endif

gfx/video_driver.c

@@ -48,6 +48,7 @@
 
 #include "video_thread_wrapper.h"
 #include "video_driver.h"
+#include "video_display_server.h"
 
 #include "../frontend/frontend_driver.h"
 #include "../record/record_driver.h"
@@ -1089,6 +1090,8 @@ static bool video_driver_init_internal(bool *video_is_threaded)
 
    video_context_driver_reset();
 
+   video_display_server_init();
+
    return true;
 
 error:
@@ -1550,6 +1553,7 @@ static void video_driver_lock_new(void)
 
 void video_driver_destroy(void)
 {
+   video_display_server_destroy();
    video_driver_cb_has_focus      = null_driver_has_focus;
    video_driver_use_rgba          = false;
    video_driver_data_own          = false;

griffin/griffin.c

@@ -188,9 +188,8 @@ VIDEO CONTEXT
 #include "../gfx/drivers_context/wgl_ctx.c"
 #endif
 
-#if defined(_WIN32) && !defined(_XBOX)
 #include "../gfx/drivers_context/gdi_ctx.c"
-#endif
+#include "../gfx/display_servers/dispserv_win32.c"
 
 #if defined(HAVE_FFMPEG)
 #if defined(HAVE_OPENGL) || defined(HAVE_OPENGLES3)
@@ -371,6 +370,7 @@ VIDEO DRIVER
 #endif
 
 #include "../gfx/drivers_renderchain/null_renderchain.c"
+#include "../gfx/display_servers/dispserv_null.c"
 
 #ifdef HAVE_OPENGL
 #include "../gfx/common/gl_common.c"
@@ -746,6 +746,7 @@ AUDIO
 DRIVERS
 ============================================================ */
 #include "../gfx/video_driver.c"
+#include "../gfx/video_display_server.c"
 #include "../gfx/video_coord_array.c"
 #include "../input/input_driver.c"
 #include "../audio/audio_driver.c"

intl/msg_hash_ja.h

@@ -3263,3 +3263,5 @@ MSG_HASH(MENU_ENUM_SUBLABEL_AUTOMATICALLY_ADD_CONTENT_TO_PLAYLIST,
       "Automatically scans loaded content so they appear inside playlists.")
 MSG_HASH(MSG_SCANNING_OF_FILE_FINISHED,
       "Scanning of file finished")
+MSG_HASH(MENU_ENUM_LABEL_VALUE_VIDEO_WINDOW_OPACITY,
+      "ウィンドウの不透明性")

intl/msg_hash_lbl.h

@@ -1377,3 +1377,5 @@ MSG_HASH(MENU_ENUM_LABEL_FRAMECOUNT_SHOW,
       "framecount_show")
 MSG_HASH(MENU_ENUM_LABEL_AUTOMATICALLY_ADD_CONTENT_TO_PLAYLIST,
       "automatically_add_content_to_playlist")
+MSG_HASH(MENU_ENUM_LABEL_VIDEO_WINDOW_OPACITY,
+      "video_window_opacity")

intl/msg_hash_us.h

@@ -3341,3 +3341,5 @@ MSG_HASH(MENU_ENUM_SUBLABEL_AUTOMATICALLY_ADD_CONTENT_TO_PLAYLIST,
       "Automatically scans loaded content so they appear inside playlists.")
 MSG_HASH(MSG_SCANNING_OF_FILE_FINISHED,
       "Scanning of file finished")
+MSG_HASH(MENU_ENUM_LABEL_VALUE_VIDEO_WINDOW_OPACITY,
+      "Window Opacity")

menu/menu_displaylist.c

@@ -6028,6 +6028,9 @@ bool menu_displaylist_ctl(enum menu_displaylist_ctl_state type, void *data)
          menu_displaylist_parse_settings_enum(menu, info,
                MENU_ENUM_LABEL_VIDEO_WINDOW_HEIGHT,
                PARSE_ONLY_UINT, false);
+         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_SCALE_INTEGER,
                PARSE_ONLY_BOOL, false);

menu/menu_setting.c

@@ -81,6 +81,7 @@
 #include "../setting_list.h"
 #include "../lakka.h"
 #include "../retroarch.h"
+#include "../gfx/video_display_server.h"
 
 #include "../tasks/tasks_internal.h"
 
@@ -1834,6 +1835,9 @@ void general_write_handler(void *data)
          retroarch_override_setting_set(RARCH_OVERRIDE_SETTING_NETPLAY_CHECK_FRAMES, NULL);
 #endif
          break;
+      case MENU_ENUM_LABEL_VIDEO_WINDOW_OPACITY:
+         video_display_server_set_window_opacity((255 * settings->uints.video_window_opacity) / 100);
+         break;
       default:
          break;
    }
@@ -3628,6 +3632,19 @@ static bool setting_append_list(
                      general_read_handler);
                menu_settings_list_current_add_range(list, list_info, 0, 4320, 8, true, true);
                settings_data_list_current_add_flags(list, list_info, SD_FLAG_LAKKA_ADVANCED);
+               CONFIG_UINT(
+                     list, list_info,
+                     &settings->uints.video_window_opacity,
+                     MENU_ENUM_LABEL_VIDEO_WINDOW_OPACITY,
+                     MENU_ENUM_LABEL_VALUE_VIDEO_WINDOW_OPACITY,
+                     window_opacity,
+                     &group_info,
+                     &subgroup_info,
+                     parent_group,
+                     general_write_handler,
+                     general_read_handler);
+               menu_settings_list_current_add_range(list, list_info, 1, 100, 1, true, true);
+               settings_data_list_current_add_flags(list, list_info, SD_FLAG_LAKKA_ADVANCED);
             }
 
             CONFIG_BOOL(

msg_hash.h

@@ -676,6 +676,7 @@ enum msg_hash_enums
    MENU_LABEL(VIDEO_WINDOWED_FULLSCREEN),
    MENU_LABEL(VIDEO_WINDOW_WIDTH),
    MENU_LABEL(VIDEO_WINDOW_HEIGHT),
+   MENU_LABEL(VIDEO_WINDOW_OPACITY),
    MENU_LABEL(VIDEO_FULLSCREEN_X),
    MENU_LABEL(VIDEO_FULLSCREEN_Y),
    MENU_LABEL(VIDEO_FORCE_SRGB_DISABLE),