(UI Companion) Start creating UI companion interface

Makefile.common

@@ -94,6 +94,8 @@ endif
 OBJ += frontend/frontend.o \
 		frontend/frontend_driver.o \
 		frontend/drivers/platform_null.o \
+		ui/ui_companion_driver.o \
+		ui/drivers/ui_null.o \
 		libretro_version_1.o \
 		retroarch.o \
 		runloop.o \

driver.h

@@ -27,6 +27,7 @@
 #include <retro_miscellaneous.h>
 
 #include "frontend/frontend_driver.h"
+#include "ui/ui_companion_driver.h"
 #include "gfx/video_driver.h"
 #include "audio/audio_driver.h"
 
@@ -190,6 +191,7 @@ enum
 typedef struct driver
 {
    const frontend_ctx_driver_t *frontend_ctx;
+   const ui_companion_driver_t *ui_companion;
    const audio_driver_t *audio;
    const video_driver_t *video;
    const void           *video_context;

griffin/griffin.c

@@ -634,6 +634,13 @@ FRONTEND
 
 #include "../core_info.c"
 
+/*============================================================
+UI
+============================================================ */
+#include "../ui/ui_companion_driver.c"
+
+#include "../ui/drivers/ui_null.c"
+
 /*============================================================
 MAIN
 ============================================================ */

ui/drivers/ui_null.c

@@ -0,0 +1,40 @@
+/* RetroArch - A frontend for libretro.
+ *  Copyright (C) 2014-2015 - Ali Bouhlel
+ *
+ * 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 <stdint.h>
+#include <boolean.h>
+#include <stddef.h>
+#include <string.h>
+
+#include <file/file_path.h>
+#include "../ui_companion_driver.h"
+
+static void ui_companion_null_deinit(void *data)
+{
+   (void)data;
+}
+
+static void ui_companion_null_init(void *data)
+{
+   (void)data;
+}
+
+const ui_companion_driver_t ui_companion_null = {
+   ui_companion_null_init,
+   ui_companion_null_deinit,
+   NULL,
+   NULL,
+   "null",
+};

ui/ui_companion_driver.c

@@ -0,0 +1,77 @@
+/*  RetroArch - A frontend for libretro.
+ *  Copyright (C) 2011-2015 - Daniel De Matteis
+ *
+ *  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 "ui_companion_driver.h"
+#include "../driver.h"
+#include <string.h>
+
+#ifdef HAVE_CONFIG_H
+#include "../config.h"
+#endif
+
+static const ui_companion_driver_t *ui_companion_drivers[] = {
+   &ui_companion_null,
+   NULL
+};
+
+/**
+ * ui_companion_find_driver:
+ * @ident               : Identifier name of driver to find.
+ *
+ * Finds driver with @ident. Does not initialize.
+ *
+ * Returns: pointer to driver if successful, otherwise NULL.
+ **/
+const ui_companion_driver_t *ui_companion_find_driver(const char *ident)
+{
+   unsigned i;
+
+   for (i = 0; ui_companion_drivers[i]; i++)
+   {
+      if (strcmp(ui_companion_drivers[i]->ident, ident) == 0)
+         return ui_companion_drivers[i];
+   }
+
+   return NULL;
+}
+
+/**
+ * ui_companion_init_first:
+ *
+ * Finds first suitable driver and initialize.
+ *
+ * Returns: pointer to first suitable driver, otherwise NULL. 
+ **/
+const ui_companion_driver_t *ui_companion_init_first(void)
+{
+   unsigned i;
+   const ui_companion_driver_t *ui_companion = NULL;
+
+   for (i = 0; ui_companion_drivers[i]; i++)
+   {
+      ui_companion = ui_companion_drivers[i];
+      break;
+   }
+
+   return ui_companion;
+}
+
+const ui_companion_driver_t *ui_companion_get_ptr(void)
+{
+   driver_t *driver        = driver_get_ptr();
+   if (!driver)
+      return NULL;
+   return driver->ui_companion;
+}

ui/ui_companion_driver.h

@@ -0,0 +1,68 @@
+/*  RetroArch - A frontend for libretro.
+ *  Copyright (C) 2010-2014 - Hans-Kristian Arntzen
+ *  Copyright (C) 2011-2015 - Daniel De Matteis
+ * 
+ *  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 __UI_COMPANION_DRIVER_H
+#define __UI_COMPANION_DRIVER_H
+
+#include <stddef.h>
+#include <boolean.h>
+
+#ifdef HAVE_CONFIG_H
+#include "../config.h"
+#endif
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef struct ui_companion_driver
+{
+   void (*init)(void *data);
+   void (*deinit)(void *data);
+   void (*toggle_companion_ui)(void);
+   void (*notify_content_loaded)(void);
+
+   const char *ident;
+} ui_companion_driver_t;
+
+extern const ui_companion_driver_t ui_companion_null;
+
+/**
+ * ui_companion_find_driver:
+ * @ident               : Identifier name of driver to find.
+ *
+ * Finds driver with @ident. Does not initialize.
+ *
+ * Returns: pointer to driver if successful, otherwise NULL.
+ **/
+const ui_companion_driver_t *ui_companion_find_driver(const char *ident);
+
+const ui_companion_driver_t *ui_companion_get_ptr(void);
+
+/**
+ * ui_companion_init_first:
+ *
+ * Finds first suitable driver and initialize.
+ *
+ * Returns: pointer to first suitable driver, otherwise NULL. 
+ **/
+const ui_companion_driver_t *ui_companion_init_first(void);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif