RetroArch/frontend/menu/backend/menu_common_backend.c

/*  RetroArch - A frontend for libretro.
 *  Copyright (C) 2010-2014 - Hans-Kristian Arntzen
 *  Copyright (C) 2011-2014 - 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 <stdint.h>
#include <stddef.h>
#include <stdlib.h>
#include <string.h>
#include <limits.h>
#include <ctype.h>
#include "menu_common_backend.h"
#include "../menu_action.h"
#include "../menu_entries.h"
#include "../menu_navigation.h"
#include "../menu_input_line_cb.h"

#include "../../../gfx/gfx_common.h"
#include "../../../gfx/shader_common.h"
#include "../../../driver.h"
#include "../../../file_ext.h"
#include "../../../input/input_common.h"
#include "../../../config.def.h"
#include "../../../input/keyboard_line.h"

#if defined(HAVE_CG) || defined(HAVE_HLSL) || defined(HAVE_GLSL)
#define HAVE_SHADER_MANAGER
#endif

#ifdef GEKKO
extern unsigned menu_gx_resolutions[GX_RESOLUTIONS_LAST][2];
extern unsigned menu_current_gx_resolution;
#endif

// FIXME: Ugly hack, nees to be refactored badly
static size_t hack_shader_pass = 0;

static void *get_last_setting(const file_list_t *list, int index,
      rarch_setting_t *settings)
{
   if (settings)
      return (rarch_setting_t*)setting_data_find_setting(settings,
            list->list[index].label);
   return NULL;
}

static int menu_info_screen_iterate(unsigned action)
{
   char msg[PATH_MAX];
   char needle[PATH_MAX];
   unsigned info_type = 0;
   rarch_setting_t *current_setting = NULL;
   rarch_setting_t *setting_data = (rarch_setting_t *)setting_data_get_list();

   if (!driver.menu || !setting_data)
      return 0;

   if (driver.video_data && driver.menu_ctx && driver.menu_ctx->render)
      driver.menu_ctx->render();

   current_setting = (rarch_setting_t*)get_last_setting(
         driver.menu->selection_buf,
         driver.menu->selection_ptr,
         setting_data_get_list());

   if (current_setting)
      strlcpy(needle, current_setting->name, sizeof(needle));
   else if ((current_setting = (rarch_setting_t*)get_last_setting(
            driver.menu->selection_buf,
            driver.menu->selection_ptr,
            setting_data_get_mainmenu(true))))
   {
      if (current_setting)
         strlcpy(needle, current_setting->name, sizeof(needle));
   }
   else
   {
         const char *label = NULL;
         file_list_get_at_offset(driver.menu->selection_buf,
               driver.menu->selection_ptr, NULL, &label,
               &info_type);

         if (label)
            strlcpy(needle, label, sizeof(needle));
   }

   setting_data_get_description(needle, msg, sizeof(msg));

   if (driver.video_data && driver.menu_ctx &&
         driver.menu_ctx->render_messagebox)
   {
      if (*msg && msg[0] != '\0')
         driver.menu_ctx->render_messagebox(msg);
   }

   if (action == MENU_ACTION_OK)
      menu_entries_pop(driver.menu->menu_stack);

   return 0;
}

static int menu_start_screen_iterate(unsigned action)
{
   unsigned i;
   char msg[1024];

   if (!driver.menu)
      return 0;

   if (driver.video_data && driver.menu_ctx && driver.menu_ctx->render)
      driver.menu_ctx->render();

   static const unsigned binds[] = {
      RETRO_DEVICE_ID_JOYPAD_UP,
      RETRO_DEVICE_ID_JOYPAD_DOWN,
      RETRO_DEVICE_ID_JOYPAD_A,
      RETRO_DEVICE_ID_JOYPAD_B,
      RETRO_DEVICE_ID_JOYPAD_SELECT,
      RARCH_MENU_TOGGLE,
      RARCH_QUIT_KEY,
   };
   char desc[ARRAY_SIZE(binds)][64];

   for (i = 0; i < ARRAY_SIZE(binds); i++)
   {
      const struct retro_keybind *bind = (const struct retro_keybind*)
         &g_settings.input.binds[0][binds[i]];
      const struct retro_keybind *auto_bind = (const struct retro_keybind*)
         input_get_auto_bind(0, binds[i]);

      input_get_bind_string(desc[i], bind, auto_bind, sizeof(desc[i]));
   }

   snprintf(msg, sizeof(msg),
         "-- Welcome to RetroArch --\n"
         " \n" // strtok_r doesn't split empty strings.

         "Basic Menu controls:\n"
         "    Scroll (Up): %-20s\n"
         "  Scroll (Down): %-20s\n"
         "      Accept/OK: %-20s\n"
         "           Back: %-20s\n"
         "           Info: %-20s\n"
         "Enter/Exit Menu: %-20s\n"
         " Exit RetroArch: %-20s\n"
         " \n"

         "To run content:\n"
         "Load a libretro core (Core).\n"
         "Load a content file (Load Content).     \n"
         " \n"

         "See Path Options to set directories\n"
         "for faster access to files.\n"
         " \n"

         "Press Accept/OK to continue.",
         desc[0], desc[1], desc[2], desc[3], desc[4], desc[5], desc[6]);

   if (driver.video_data && driver.menu_ctx && driver.menu_ctx->render_messagebox)
      driver.menu_ctx->render_messagebox(msg);

   if (action == MENU_ACTION_OK)
      menu_entries_pop(driver.menu->menu_stack);

   return 0;
}

static int menu_common_core_setting_toggle(unsigned setting, unsigned action)
{
   unsigned index = setting - MENU_SETTINGS_CORE_OPTION_START;

   switch (action)
   {
      case MENU_ACTION_LEFT:
         core_option_prev(g_extern.system.core_options, index);
         break;

      case MENU_ACTION_RIGHT:
      case MENU_ACTION_OK:
         core_option_next(g_extern.system.core_options, index);
         break;

      case MENU_ACTION_START:
         core_option_set_default(g_extern.system.core_options, index);
         break;

      default:
         break;
   }

   return 0;
}

static int menu_common_setting_set_perf(unsigned setting, unsigned action,
      struct retro_perf_counter **counters, unsigned offset)
{
   if (counters[offset] && action == MENU_ACTION_START)
   {
      counters[offset]->total = 0;
      counters[offset]->call_cnt = 0;
   }
   return 0;
}


static int menu_common_setting_set_current_path_selection(
      rarch_setting_t *setting, const char *start_path,
      const char *label, unsigned type,
      unsigned action)
{
   switch (action)
   {
      case MENU_ACTION_OK:
         menu_entries_push(driver.menu->menu_stack,
               start_path, label, type,
               driver.menu->selection_ptr);

         if (setting->cmd_trigger.idx != RARCH_CMD_NONE)
            setting->cmd_trigger.triggered = true;
         break;
      case MENU_ACTION_START:
         *setting->value.string = '\0';
         break;
   }

   return menu_action_setting_apply(setting);
}

static int handle_setting(rarch_setting_t *setting,
      unsigned id, const char *label, unsigned action)
{
   if (setting->type == ST_BOOL)
      return menu_action_setting_boolean(setting, action);
   if (setting->type == ST_UINT)
      return menu_action_setting_unsigned_integer(setting, id, action);
   if (setting->type == ST_FLOAT)
      return menu_action_setting_fraction(setting, action);
   if (setting->type == ST_PATH)
      return menu_common_setting_set_current_path_selection(setting,
            setting->default_value.string, setting->name, id, action);

   if (setting->type == ST_DIR)
   {
      if (action == MENU_ACTION_START)
      {
         *setting->value.string = '\0';
         return menu_action_setting_apply(setting);
      }
      return 0;
   }

   if (setting->type == ST_STRING)
   {
      if (
            (setting->flags & SD_FLAG_ALLOW_INPUT) || 
            id == MENU_FILE_LINEFEED_SWITCH)
      {
         if (action == MENU_ACTION_OK)
            menu_key_start_line(driver.menu, setting->short_description,
                  setting->name, st_string_callback);
         else if (action == MENU_ACTION_START)
            *setting->value.string = '\0';
      }
      else
         menu_action_setting_driver(setting, action);
   }

   return 0;
}

static int menu_setting_set(unsigned id, const char *label,
      unsigned action)
{
   unsigned port = driver.menu->current_pad;
   rarch_setting_t *setting = (rarch_setting_t*)get_last_setting(
         driver.menu->selection_buf, driver.menu->selection_ptr,
         setting_data_get_list()
         );

   if (setting)
      return handle_setting(setting, id, label, action);
   else
   {
      setting = (rarch_setting_t*)get_last_setting(
            driver.menu->selection_buf, driver.menu->selection_ptr,
            setting_data_get_mainmenu(true)
            );

      if (setting)
      {
         if (!strcmp(setting->name, "disk_index"))
         {
            int step = 0;

            if (action == MENU_ACTION_RIGHT || action == MENU_ACTION_OK)
               step = 1;
            else if (action == MENU_ACTION_LEFT)
               step = -1;

            if (step)
            {
               const struct retro_disk_control_callback *control =
                  (const struct retro_disk_control_callback*)
                  &g_extern.system.disk_control;
               unsigned num_disks = control->get_num_images();
               unsigned current   = control->get_image_index();
               unsigned next_index = (current + num_disks + 1 + step)
                  % (num_disks + 1);
               rarch_disk_control_set_eject(true, false);
               rarch_disk_control_set_index(next_index);
               rarch_disk_control_set_eject(false, false);
            }
         }

         return handle_setting(setting, id, label, action);
      }
      else if (!strcmp(label, "video_shader_num_passes"))
      {
#ifdef HAVE_SHADER_MANAGER
         struct gfx_shader *shader = (struct gfx_shader*)
            driver.menu->shader;

         switch (action)
         {
            case MENU_ACTION_START:
               if (shader && shader->passes)
                  shader->passes = 0;
               driver.menu->need_refresh = true;
               break;

            case MENU_ACTION_LEFT:
               if (shader && shader->passes)
                  shader->passes--;
               driver.menu->need_refresh = true;
               break;

            case MENU_ACTION_RIGHT:
            case MENU_ACTION_OK:
               if (shader && (shader->passes < GFX_MAX_SHADERS))
                  shader->passes++;
               driver.menu->need_refresh = true;
               break;

            default:
               break;
         }

         if (driver.menu->need_refresh)
            gfx_shader_resolve_parameters(NULL, driver.menu->shader);
#endif
      }
      else if (!strcmp(label, "input_bind_device_id"))
      {
         int *p = &g_settings.input.joypad_map[port];
         if (action == MENU_ACTION_START)
            *p = port;
         else if (action == MENU_ACTION_LEFT)
            (*p)--;
         else if (action == MENU_ACTION_RIGHT)
            (*p)++;

         if (*p < -1)
            *p = -1;
         else if (*p >= MAX_PLAYERS)
            *p = MAX_PLAYERS - 1;
      }
      else if (!strcmp(label, "input_bind_device_type"))
      {
         unsigned current_device, current_index, i, devices[128];
         const struct retro_controller_info *desc;
         unsigned types = 0;

         devices[types++] = RETRO_DEVICE_NONE;
         devices[types++] = RETRO_DEVICE_JOYPAD;

         /* Only push RETRO_DEVICE_ANALOG as default if we use an 
          * older core which doesn't use SET_CONTROLLER_INFO. */
         if (!g_extern.system.num_ports)
            devices[types++] = RETRO_DEVICE_ANALOG;

         desc = port < g_extern.system.num_ports ?
            &g_extern.system.ports[port] : NULL;
         if (desc)
         {
            for (i = 0; i < desc->num_types; i++)
            {
               unsigned id = desc->types[i].id;
               if (types < ARRAY_SIZE(devices) &&
                     id != RETRO_DEVICE_NONE &&
                     id != RETRO_DEVICE_JOYPAD)
                  devices[types++] = id;
            }
         }

         current_device = g_settings.input.libretro_device[port];
         current_index = 0;
         for (i = 0; i < types; i++)
         {
            if (current_device == devices[i])
            {
               current_index = i;
               break;
            }
         }

         bool updated = true;
         switch (action)
         {
            case MENU_ACTION_START:
               current_device = RETRO_DEVICE_JOYPAD;
               break;

            case MENU_ACTION_LEFT:
               current_device = devices
                  [(current_index + types - 1) % types];
               break;

            case MENU_ACTION_RIGHT:
            case MENU_ACTION_OK:
               current_device = devices
                  [(current_index + 1) % types];
               break;

            default:
               updated = false;
         }

         if (updated)
         {
            g_settings.input.libretro_device[port] = current_device;
            pretro_set_controller_port_device(port, current_device);
         }

      }
      else if (!strcmp(label, "input_bind_player_no"))
      {
         if (action == MENU_ACTION_START)
            driver.menu->current_pad = 0;
         else if (action == MENU_ACTION_LEFT)
         {
            if (driver.menu->current_pad != 0)
               driver.menu->current_pad--;
         }
         else if (action == MENU_ACTION_RIGHT)
         {
            if (driver.menu->current_pad < MAX_PLAYERS - 1)
               driver.menu->current_pad++;
         }
         if (port != driver.menu->current_pad)
            driver.menu->need_refresh = true;
         port = driver.menu->current_pad;
      }
      else if (!strcmp(label, "input_bind_analog_dpad_mode"))
      {
         switch (action)
         {
            case MENU_ACTION_START:
               g_settings.input.analog_dpad_mode[port] = 0;
               break;

            case MENU_ACTION_OK:
            case MENU_ACTION_RIGHT:
               g_settings.input.analog_dpad_mode[port] =
                  (g_settings.input.analog_dpad_mode[port] + 1)
                  % ANALOG_DPAD_LAST;
               break;

            case MENU_ACTION_LEFT:
               g_settings.input.analog_dpad_mode[port] =
                  (g_settings.input.analog_dpad_mode
                   [port] + ANALOG_DPAD_LAST - 1) % ANALOG_DPAD_LAST;
               break;

            default:
               break;
         }
      }
      else
      {
         switch (id)
         {
            case MENU_SETTINGS_CUSTOM_BIND_MODE:
               if (action == MENU_ACTION_LEFT || action == MENU_ACTION_RIGHT)
                  driver.menu->bind_mode_keyboard =
                    !driver.menu->bind_mode_keyboard;
               break;
#if defined(GEKKO)
            case MENU_SETTINGS_VIDEO_RESOLUTION:
               if (action == MENU_ACTION_LEFT)
               {
                  if (menu_current_gx_resolution > 0)
                     menu_current_gx_resolution--;
               }
               else if (action == MENU_ACTION_RIGHT)
               {
                  if (menu_current_gx_resolution < GX_RESOLUTIONS_LAST - 1)
                  {
#ifdef HW_RVL
                     if ((menu_current_gx_resolution + 1) > GX_RESOLUTIONS_640_480)
                        if (CONF_GetVideo() != CONF_VIDEO_PAL)
                           return 0;
#endif

                     menu_current_gx_resolution++;
                  }
               }
               else if (action == MENU_ACTION_OK)
               {
                  if (driver.video_data)
                     gx_set_video_mode(driver.video_data, menu_gx_resolutions
                           [menu_current_gx_resolution][0],
                           menu_gx_resolutions[menu_current_gx_resolution][1]);
               }
               break;
#elif defined(__CELLOS_LV2__)
            case MENU_SETTINGS_VIDEO_RESOLUTION:
               if (action == MENU_ACTION_LEFT)
               {
                  if (g_extern.console.screen.resolutions.current.idx)
                  {
                     g_extern.console.screen.resolutions.current.idx--;
                     g_extern.console.screen.resolutions.current.id =
                        g_extern.console.screen.resolutions.list
                        [g_extern.console.screen.resolutions.current.idx];
                  }
               }
               else if (action == MENU_ACTION_RIGHT)
               {
                  if (g_extern.console.screen.resolutions.current.idx + 1 <
                        g_extern.console.screen.resolutions.count)
                  {
                     g_extern.console.screen.resolutions.current.idx++;
                     g_extern.console.screen.resolutions.current.id =
                        g_extern.console.screen.resolutions.list
                        [g_extern.console.screen.resolutions.current.idx];
                  }
               }
               else if (action == MENU_ACTION_OK)
               {
                  if (g_extern.console.screen.resolutions.list[
                        g_extern.console.screen.resolutions.current.idx] == 
                        CELL_VIDEO_OUT_RESOLUTION_576)
                  {
                     if (g_extern.console.screen.pal_enable)
                        g_extern.console.screen.pal60_enable = true;
                  }
                  else
                  {
                     g_extern.console.screen.pal_enable = false;
                     g_extern.console.screen.pal60_enable = false;
                  }

                  rarch_main_command(RARCH_CMD_REINIT);
               }
#endif
               break;
            default:
               break;
         }
      }
   }

   return 0;
}

static void menu_common_shader_manager_init(menu_handle_t *menu)
{
#ifdef HAVE_SHADER_MANAGER
   char cgp_path[PATH_MAX];
   config_file_t *conf = NULL;
   const char *config_path = NULL;
   struct gfx_shader *shader = (struct gfx_shader*)menu->shader;

   if (*g_extern.core_specific_config_path
         && g_settings.core_specific_config)
      config_path = g_extern.core_specific_config_path;
   else if (*g_extern.config_path)
      config_path = g_extern.config_path;

   /* In a multi-config setting, we can't have
    * conflicts on menu.cgp/menu.glslp. */
   if (config_path)
   {
      fill_pathname_base(menu->default_glslp, config_path,
            sizeof(menu->default_glslp));
      path_remove_extension(menu->default_glslp);
      strlcat(menu->default_glslp, ".glslp", sizeof(menu->default_glslp));
      fill_pathname_base(menu->default_cgp, config_path,
            sizeof(menu->default_cgp));
      path_remove_extension(menu->default_cgp);
      strlcat(menu->default_cgp, ".cgp", sizeof(menu->default_cgp));
   }
   else
   {
      strlcpy(menu->default_glslp, "menu.glslp", sizeof(menu->default_glslp));
      strlcpy(menu->default_cgp, "menu.cgp", sizeof(menu->default_cgp));
   }


   const char *ext = path_get_extension(g_settings.video.shader_path);
   if (strcmp(ext, "glslp") == 0 || strcmp(ext, "cgp") == 0)
   {
      conf = config_file_new(g_settings.video.shader_path);
      if (conf)
      {
         if (gfx_shader_read_conf_cgp(conf, shader))
         {
            gfx_shader_resolve_relative(shader, g_settings.video.shader_path);
            gfx_shader_resolve_parameters(conf, shader);
         }
         config_file_free(conf);
      }
   }
   else if (strcmp(ext, "glsl") == 0 || strcmp(ext, "cg") == 0)
   {
      strlcpy(shader->pass[0].source.path, g_settings.video.shader_path,
            sizeof(shader->pass[0].source.path));
      shader->passes = 1;
   }
   else
   {
      const char *shader_dir = *g_settings.video.shader_dir ?
         g_settings.video.shader_dir : g_settings.system_directory;

      fill_pathname_join(cgp_path, shader_dir, "menu.glslp", sizeof(cgp_path));
      conf = config_file_new(cgp_path);

      if (!conf)
      {
         fill_pathname_join(cgp_path, shader_dir, "menu.cgp", sizeof(cgp_path));
         conf = config_file_new(cgp_path);
      }

      if (conf)
      {
         if (gfx_shader_read_conf_cgp(conf, shader))
         {
            gfx_shader_resolve_relative(shader, cgp_path);
            gfx_shader_resolve_parameters(conf, shader);
         }
         config_file_free(conf);
      }
   }
#endif
}

static void menu_common_shader_manager_set_preset(struct gfx_shader *shader,
      unsigned type, const char *cgp_path)
{
#ifdef HAVE_SHADER_MANAGER
   RARCH_LOG("Setting Menu shader: %s.\n", cgp_path ? cgp_path : "N/A (stock)");
   g_settings.video.shader_enable = false;

   if (driver.video->set_shader && driver.video->set_shader(driver.video_data,
            (enum rarch_shader_type)type, cgp_path))
   {
      /* Makes sure that we use Menu CGP shader on driver reinit.
       * Only do this when the cgp actually works to avoid potential errors. */
      strlcpy(g_settings.video.shader_path, cgp_path ? cgp_path : "",
            sizeof(g_settings.video.shader_path));
      g_settings.video.shader_enable = true;

      if (cgp_path && shader)
      {
         /* Load stored CGP into menu on success.
          * Used when a preset is directly loaded.
          * No point in updating when the CGP was 
          * created from the menu itself. */
         config_file_t *conf = config_file_new(cgp_path);

         if (conf)
         {
            if (gfx_shader_read_conf_cgp(conf, shader))
            {
               gfx_shader_resolve_relative(shader, cgp_path);
               gfx_shader_resolve_parameters(conf, shader);
            }
            config_file_free(conf);
         }

         driver.menu->need_refresh = true;
      }
   }
#endif
}

static void menu_common_shader_manager_get_str(struct gfx_shader *shader,
      char *type_str, size_t type_str_size, const char *menu_label,
      const char *label, unsigned type)
{
#ifdef HAVE_SHADER_MANAGER
   *type_str = '\0';

   if (!strcmp(label, "video_shader_num_passes"))
      snprintf(type_str, type_str_size, "%u", shader->passes);
   else if (type >= MENU_SETTINGS_SHADER_PARAMETER_0
         && type <= MENU_SETTINGS_SHADER_PARAMETER_LAST)
   {
      /* menu->parameter_shader here. */
      if (shader)
      {
         const struct gfx_shader_parameter *param =
            (const struct gfx_shader_parameter*)&shader->parameters
            [type - MENU_SETTINGS_SHADER_PARAMETER_0];
         snprintf(type_str, type_str_size, "%.2f [%.2f %.2f]",
               param->current, param->minimum, param->maximum);
      }
   }
   else if (!strcmp(label, "video_shader_default_filter"))
      snprintf(type_str, type_str_size, "%s",
            g_settings.video.smooth ? "Linear" : "Nearest");
   else if (!strcmp(label, "video_shader_pass"))
   {
      unsigned pass = (type - MENU_SETTINGS_SHADER_PASS_0);
      if (*shader->pass[pass].source.path)
         fill_pathname_base(type_str,
               shader->pass[pass].source.path, type_str_size);
      else
         strlcpy(type_str, "N/A", type_str_size);
   }
   else if (!strcmp(label, "video_shader_filter_pass"))
   {
      unsigned pass = (type - MENU_SETTINGS_SHADER_PASS_FILTER_0);
      static const char *modes[] = {
         "Don't care",
         "Linear",
         "Nearest"
      };

      strlcpy(type_str, modes[shader->pass[pass].filter],
            type_str_size);
   }
   else if (!strcmp(label, "video_shader_scale_pass"))
   {
      unsigned pass = (type - MENU_SETTINGS_SHADER_PASS_SCALE_0);
      unsigned scale = shader->pass[pass].fbo.scale_x;
      if (!scale)
         strlcpy(type_str, "Don't care", type_str_size);
      else
         snprintf(type_str, type_str_size, "%ux", scale);
   }
#endif
}

static void menu_common_shader_manager_save_preset(
      const char *basename, bool apply)
{
#ifdef HAVE_SHADER_MANAGER
   char buffer[PATH_MAX], config_directory[PATH_MAX], cgp_path[PATH_MAX];
   unsigned d, type = RARCH_SHADER_NONE;
   config_file_t *conf = NULL;
   bool ret = false;

   if (!driver.menu)
   {
      RARCH_ERR("Cannot save shader preset, menu handle is not initialized.\n");
      return;
   }

   if (driver.menu_ctx && driver.menu_ctx->backend
         && driver.menu_ctx->backend->shader_manager_get_type)
      type = driver.menu_ctx->backend->shader_manager_get_type
         (driver.menu->shader);

   if (type == RARCH_SHADER_NONE)
      return;

   *config_directory = '\0';

   if (basename)
   {
      strlcpy(buffer, basename, sizeof(buffer));

      /* Append extension automatically as appropriate. */
      if (!strstr(basename, ".cgp") && !strstr(basename, ".glslp"))
      {
         if (type == RARCH_SHADER_GLSL)
            strlcat(buffer, ".glslp", sizeof(buffer));
         else if (type == RARCH_SHADER_CG)
            strlcat(buffer, ".cgp", sizeof(buffer));
      }
   }
   else
   {
      const char *conf_path = (type == RARCH_SHADER_GLSL) ?
         driver.menu->default_glslp : driver.menu->default_cgp;
      strlcpy(buffer, conf_path, sizeof(buffer));
   }

   if (*g_extern.config_path)
      fill_pathname_basedir(config_directory,
            g_extern.config_path, sizeof(config_directory));

   const char *dirs[] = {
      g_settings.video.shader_dir,
      g_settings.menu_config_directory,
      config_directory,
   };

   if (!(conf = (config_file_t*)config_file_new(NULL)))
      return;
   gfx_shader_write_conf_cgp(conf, driver.menu->shader);

   for (d = 0; d < ARRAY_SIZE(dirs); d++)
   {
      if (!*dirs[d])
         continue;

      fill_pathname_join(cgp_path, dirs[d], buffer, sizeof(cgp_path));
      if (config_file_write(conf, cgp_path))
      {
         RARCH_LOG("Saved shader preset to %s.\n", cgp_path);
         if (apply)
         {
            if (driver.menu_ctx && driver.menu_ctx->backend
                  && driver.menu_ctx->backend->shader_manager_set_preset)
               driver.menu_ctx->backend->shader_manager_set_preset(
                     NULL, type, cgp_path);
         }
         ret = true;
         break;
      }
      else
         RARCH_LOG("Failed writing shader preset to %s.\n", cgp_path);
   }

   config_file_free(conf);
   if (!ret)
      RARCH_ERR("Failed to save shader preset. Make sure config directory and/or shader dir are writable.\n");
#endif
}

static unsigned menu_common_shader_manager_get_type(
      const struct gfx_shader *shader)
{
   /* All shader types must be the same, or we cannot use it. */
   unsigned i, type = 0;

   (void)i;

#ifdef HAVE_SHADER_MANAGER
   if (!shader)
   {
      RARCH_ERR("Cannot get shader type, shader handle is not initialized.\n");
      return RARCH_SHADER_NONE;
   }

   for (i = 0; i < shader->passes; i++)
   {
      enum rarch_shader_type pass_type = gfx_shader_parse_type(shader->pass[i].source.path,
            RARCH_SHADER_NONE);

      switch (pass_type)
      {
         case RARCH_SHADER_CG:
         case RARCH_SHADER_GLSL:
            if (type == RARCH_SHADER_NONE)
               type = pass_type;
            else if (type != pass_type)
               return RARCH_SHADER_NONE;
            break;
         default:
            return RARCH_SHADER_NONE;
      }
   }
#endif

   return type;
}

static int menu_common_shader_manager_setting_toggle(
      unsigned id, const char *label, unsigned action)
{
#ifdef HAVE_SHADER_MANAGER
   if (!driver.menu)
   {
      RARCH_ERR("Cannot toggle shader setting, menu handle is not initialized.\n");
      return 0;
   }

#if 0
   RARCH_LOG("shader label: %s\n", label);
#endif

   rarch_setting_t *current_setting = NULL;
   rarch_setting_t *setting_data = (rarch_setting_t *)setting_data_get_list();


   if (!strcmp(label, "video_shader_default_filter"))
   {
      if ((current_setting = setting_data_find_setting(
                  setting_data, "video_smooth")))
         menu_action_setting_boolean(current_setting, action);
   }
   else if (id >= MENU_SETTINGS_SHADER_PARAMETER_0
         && id <= MENU_SETTINGS_SHADER_PARAMETER_LAST)
   {
      bool apply_changes = false;
      struct gfx_shader *shader = NULL;
      struct gfx_shader_parameter *param = NULL;

      if (!(shader = (struct gfx_shader*)driver.menu->parameter_shader))
         return 0;

      if (!(param = &shader->parameters[id - MENU_SETTINGS_SHADER_PARAMETER_0]))
         return 0;

      switch (action)
      {
         case MENU_ACTION_START:
            param->current = param->initial;
            apply_changes = true;
            break;

         case MENU_ACTION_LEFT:
            param->current -= param->step;
            apply_changes = true;
            break;

         case MENU_ACTION_RIGHT:
            param->current += param->step;
            apply_changes = true;
            break;

         default:
            break;
      }

      param->current = min(max(param->minimum, param->current), param->maximum);

      if (apply_changes)
         rarch_main_command(RARCH_CMD_SHADERS_APPLY_CHANGES);
   }
   else if ((!strcmp(label, "video_shader_parameters") ||
            !strcmp(label, "video_shader_preset_parameters"))
         && action == MENU_ACTION_OK)
      menu_entries_push(driver.menu->menu_stack, "",
            "video_shader_parameters", MENU_FILE_SWITCH, driver.menu->selection_ptr);
   else if (!strcmp(label, "shader_apply_changes") ||
         !strcmp(label, "video_shader_num_passes"))
      menu_setting_set(id, label, action);
   else if (!strcmp(label, "video_shader_preset"))
   {
      switch (action)
      {
         case MENU_ACTION_OK:
            menu_entries_push(driver.menu->menu_stack,
                  g_settings.video.shader_dir, 
                  "video_shader_preset",
                  id, driver.menu->selection_ptr);
            break;

         case MENU_ACTION_START:
            break;

         default:
            break;
      }
   }
   else if (!strcmp(label, "video_shader_pass"))
   {
      hack_shader_pass = id - MENU_SETTINGS_SHADER_PASS_0;
      struct gfx_shader *shader = (struct gfx_shader*)driver.menu->shader;
      struct gfx_shader_pass *shader_pass = NULL;

      if (shader)
         shader_pass = (struct gfx_shader_pass*)&shader->pass[hack_shader_pass];

      switch (action)
      {
         case MENU_ACTION_OK:
            menu_entries_push(driver.menu->menu_stack,
                  g_settings.video.shader_dir, 
                  "video_shader_pass",
                  id, driver.menu->selection_ptr);
            break;
         case MENU_ACTION_START:
            if (shader_pass)
               *shader_pass->source.path = '\0';
            break;

         default:
            break;
      }
   }
   else if (!strcmp(label, "video_shader_filter_pass"))
   {
      unsigned pass = id - MENU_SETTINGS_SHADER_PASS_FILTER_0;
      struct gfx_shader *shader = (struct gfx_shader*)driver.menu->shader;
      struct gfx_shader_pass *shader_pass = (struct gfx_shader_pass*)
         &shader->pass[pass];

      switch (action)
      {
         case MENU_ACTION_START:
            if (shader)
               shader->pass[pass].filter = RARCH_FILTER_UNSPEC;
            break;

         case MENU_ACTION_LEFT:
         case MENU_ACTION_RIGHT:
         case MENU_ACTION_OK:
         {
            unsigned delta = (action == MENU_ACTION_LEFT) ? 2 : 1;
            if (shader_pass)
               shader_pass->filter = ((shader_pass->filter + delta) % 3);
            break;
         }

         default:
         break;
      }
   }
   else if (!strcmp(label, "video_shader_scale_pass"))
   {
      unsigned pass = id - MENU_SETTINGS_SHADER_PASS_SCALE_0;
      struct gfx_shader *shader = (struct gfx_shader*)driver.menu->shader;
      struct gfx_shader_pass *shader_pass = (struct gfx_shader_pass*)
         &shader->pass[pass];

      switch (action)
      {
         case MENU_ACTION_START:
            if (shader)
            {
               shader_pass->fbo.scale_x = shader_pass->fbo.scale_y = 0;
               shader_pass->fbo.valid = false;
            }
            break;

         case MENU_ACTION_LEFT:
         case MENU_ACTION_RIGHT:
         case MENU_ACTION_OK:
         {
            unsigned current_scale = shader_pass->fbo.scale_x;
            unsigned delta = action == MENU_ACTION_LEFT ? 5 : 1;
            current_scale = (current_scale + delta) % 6;

            if (shader_pass)
            {
               shader_pass->fbo.valid = current_scale;
               shader_pass->fbo.scale_x = shader_pass->fbo.scale_y = current_scale;
            }
            break;
         }

         default:
         break;
      }
   }
#endif

   return 0;
}

static int menu_setting_ok_toggle(unsigned type,
      const char *dir, const char *label,
      unsigned action)
{
   if (type == MENU_SETTINGS_CUSTOM_BIND_ALL)
   {
      driver.menu->binds.target = &g_settings.input.binds
         [driver.menu->current_pad][0];
      driver.menu->binds.begin = MENU_SETTINGS_BIND_BEGIN;
      driver.menu->binds.last = MENU_SETTINGS_BIND_LAST;

      file_list_push(driver.menu->menu_stack, "", "",
            driver.menu->bind_mode_keyboard ?
            MENU_SETTINGS_CUSTOM_BIND_KEYBOARD :
            MENU_SETTINGS_CUSTOM_BIND,
            driver.menu->selection_ptr);
      if (driver.menu->bind_mode_keyboard)
      {
         driver.menu->binds.timeout_end =
            rarch_get_time_usec() + 
            MENU_KEYBOARD_BIND_TIMEOUT_SECONDS * 1000000;
         input_keyboard_wait_keys(driver.menu,
               menu_custom_bind_keyboard_cb);
      }
      else
      {
         menu_poll_bind_get_rested_axes(&driver.menu->binds);
         menu_poll_bind_state(&driver.menu->binds);
      }
      return 0;
   }
#ifdef HAVE_SHADER_MANAGER
   else if (!strcmp(label, "video_shader_preset_save_as"))
   {
      if (action == MENU_ACTION_OK)
         menu_key_start_line(driver.menu, "Preset Filename",
               label, st_string_callback);
   }
   else if (!strcmp(label, "shader_apply_changes"))
   {
      rarch_main_command(RARCH_CMD_SHADERS_APPLY_CHANGES);
      return 0;
   }
#endif
   else if (type == MENU_SETTINGS_CUSTOM_BIND_DEFAULT_ALL)
   {
      unsigned i;
      struct retro_keybind *target = (struct retro_keybind*)
         &g_settings.input.binds[driver.menu->current_pad][0];
      const struct retro_keybind *def_binds = 
         driver.menu->current_pad ? retro_keybinds_rest : retro_keybinds_1;

      driver.menu->binds.begin = MENU_SETTINGS_BIND_BEGIN;
      driver.menu->binds.last = MENU_SETTINGS_BIND_LAST;

      for (i = MENU_SETTINGS_BIND_BEGIN;
            i <= MENU_SETTINGS_BIND_LAST; i++, target++)
      {
         if (driver.menu->bind_mode_keyboard)
            target->key = def_binds[i - MENU_SETTINGS_BIND_BEGIN].key;
         else
         {
            target->joykey = NO_BTN;
            target->joyaxis = AXIS_NONE;
         }
      }
      return 0;
   }
   else if (type >= MENU_SETTINGS_BIND_BEGIN &&
         type <= MENU_SETTINGS_BIND_ALL_LAST)
   {
      struct retro_keybind *bind = (struct retro_keybind*)
         &g_settings.input.binds[driver.menu->current_pad]
         [type - MENU_SETTINGS_BIND_BEGIN];

      driver.menu->binds.begin  = type;
      driver.menu->binds.last   = type;
      driver.menu->binds.target = bind;
      driver.menu->binds.player = driver.menu->current_pad;
      file_list_push(driver.menu->menu_stack, "", "",
            driver.menu->bind_mode_keyboard ?
            MENU_SETTINGS_CUSTOM_BIND_KEYBOARD : MENU_SETTINGS_CUSTOM_BIND,
            driver.menu->selection_ptr);

      if (driver.menu->bind_mode_keyboard)
      {
         driver.menu->binds.timeout_end = rarch_get_time_usec() +
            MENU_KEYBOARD_BIND_TIMEOUT_SECONDS * 1000000;
         input_keyboard_wait_keys(driver.menu,
               menu_custom_bind_keyboard_cb);
      }
      else
      {
         menu_poll_bind_get_rested_axes(&driver.menu->binds);
         menu_poll_bind_state(&driver.menu->binds);
      }

      return 0;
   }
   else if (
         !strcmp(label, "load_content") ||
         !strcmp(label, "detect_core_list")
      )
   {
      menu_entries_push(driver.menu->menu_stack,
            g_settings.menu_content_directory, label, MENU_FILE_DIRECTORY,
            driver.menu->selection_ptr);
      return 0;
   }
   else if (!strcmp(label, "history_list") ||
         menu_common_type_is(label, type) == MENU_FILE_DIRECTORY
         )
   {
      menu_entries_push(driver.menu->menu_stack,
            "", label, type, driver.menu->selection_ptr);
      return 0;
   }
   else if (
         menu_common_type_is(label, type) == MENU_SETTINGS ||
         !strcmp(label, "core_list") ||
         !strcmp(label, "configurations") ||
         !strcmp(label, "disk_image_append")
         )
   {
      menu_entries_push(driver.menu->menu_stack,
            dir ? dir : label, label, type,
            driver.menu->selection_ptr);
      return 0;
   }
   else if (type == MENU_SETTINGS_CUSTOM_VIEWPORT)
   {
      file_list_push(driver.menu->menu_stack, "", "",
            MENU_SETTINGS_CUSTOM_VIEWPORT,
            driver.menu->selection_ptr);

      /* Start with something sane. */
      rarch_viewport_t *custom = (rarch_viewport_t*)
         &g_extern.console.screen.viewports.custom_vp;

      if (driver.video_data && driver.video &&
            driver.video->viewport_info)
         driver.video->viewport_info(driver.video_data, custom);
      aspectratio_lut[ASPECT_RATIO_CUSTOM].value =
         (float)custom->width / custom->height;

      g_settings.video.aspect_ratio_idx = ASPECT_RATIO_CUSTOM;

      rarch_main_command(RARCH_CMD_VIDEO_SET_ASPECT_RATIO);
      return 0;
   }
   return -1;
}

static int menu_setting_start_toggle(unsigned type,
      const char *dir, const char *label,
      unsigned action)
{
   if (type >= MENU_SETTINGS_BIND_BEGIN &&
         type <= MENU_SETTINGS_BIND_ALL_LAST)
   {
      struct retro_keybind *bind = (struct retro_keybind*)
         &g_settings.input.binds[driver.menu->current_pad]
         [type - MENU_SETTINGS_BIND_BEGIN];

      if (driver.menu->bind_mode_keyboard)
      {
         const struct retro_keybind *def_binds = driver.menu->current_pad ?
            retro_keybinds_rest : retro_keybinds_1;
         bind->key = def_binds[type - MENU_SETTINGS_BIND_BEGIN].key;
      }
      else
      {
         bind->joykey = NO_BTN;
         bind->joyaxis = AXIS_NONE;
      }

      return 0;
   }
   return -1;
}

static int menu_setting_toggle(unsigned type,
      const char *dir, const char *label,
      unsigned action)
{
   struct retro_perf_counter **counters = NULL;

   if ((menu_common_type_is(label, type) == MENU_SETTINGS_SHADER_OPTIONS) ||
         !strcmp(label, "video_shader_parameters") ||
         !strcmp(label, "video_shader_preset_parameters")
         )
   {
      if (driver.menu_ctx && driver.menu_ctx->backend
            && driver.menu_ctx->backend->shader_manager_setting_toggle)
         return driver.menu_ctx->backend->shader_manager_setting_toggle(
               type, label, action);
   }
   else if ((type >= MENU_SETTINGS_CORE_OPTION_START))
      return menu_common_core_setting_toggle(type, action);
   else if (type >= MENU_SETTINGS_PERF_COUNTERS_BEGIN &&
         type <= MENU_SETTINGS_PERF_COUNTERS_END)
   {
      counters = (struct retro_perf_counter**)perf_counters_rarch;
      return menu_common_setting_set_perf(type, action, counters,
            type - MENU_SETTINGS_PERF_COUNTERS_BEGIN);
   }
   else if (type >= MENU_SETTINGS_LIBRETRO_PERF_COUNTERS_BEGIN &&
         type <= MENU_SETTINGS_LIBRETRO_PERF_COUNTERS_END)
   {
      counters = (struct retro_perf_counter**)perf_counters_libretro;
      return menu_common_setting_set_perf(type, action, counters,
            type - MENU_SETTINGS_LIBRETRO_PERF_COUNTERS_BEGIN);
   }
   else if (driver.menu_ctx && driver.menu_ctx->backend)
      return menu_setting_set(type, label, action);

   return 0;
}

static int menu_settings_iterate(unsigned action)
{
   const char *path = NULL;
   const char *dir  = NULL;
   const char *label = NULL;
   unsigned type = 0;
   unsigned menu_type = 0;

   driver.menu->frame_buf_pitch = driver.menu->width * 2;

   if (action != MENU_ACTION_REFRESH)
      file_list_get_at_offset(driver.menu->selection_buf,
            driver.menu->selection_ptr, NULL, &label, &type);

   if (!strcmp(label, "core_list"))
      dir = g_settings.libretro_directory;
   else if (!strcmp(label, "configurations"))
      dir = g_settings.menu_config_directory;
   else if (!strcmp(label, "disk_image_append"))
      dir = g_settings.menu_content_directory;

   if (driver.menu->need_refresh && action != MENU_ACTION_MESSAGE)
      action = MENU_ACTION_NOOP;

   switch (action)
   {
      case MENU_ACTION_UP:
         if (driver.menu->selection_ptr > 0)
            menu_decrement_navigation(driver.menu);
         else
            menu_set_navigation(driver.menu,
                  file_list_get_size(driver.menu->selection_buf) - 1);
         break;

      case MENU_ACTION_DOWN:
         if ((driver.menu->selection_ptr + 1) <
               file_list_get_size(driver.menu->selection_buf))
            menu_increment_navigation(driver.menu);
         else
            menu_clear_navigation(driver.menu);
         break;

      case MENU_ACTION_CANCEL:
         menu_entries_pop(driver.menu->menu_stack);
         break;
      case MENU_ACTION_SELECT:
         file_list_push(driver.menu->menu_stack, "", "info_screen",
               0, driver.menu->selection_ptr);
         break;
      case MENU_ACTION_OK:
         if (menu_setting_ok_toggle(type, dir, label, action) == 0)
            return 0;
         /* fall-through */
      case MENU_ACTION_START:
         if (menu_setting_start_toggle(type, dir, label, action) == 0)
            return 0;
         /* fall-through */
      case MENU_ACTION_LEFT:
      case MENU_ACTION_RIGHT:
         {
            int ret = menu_setting_toggle(type, dir,
                  label, action);

            if (ret)
               return ret;
         }
         break;

      case MENU_ACTION_REFRESH:
         menu_clear_navigation(driver.menu);
         driver.menu->need_refresh = true;
         break;

      case MENU_ACTION_MESSAGE:
         driver.menu->msg_force = true;
         break;

      default:
         break;
   }

   file_list_get_last(driver.menu->menu_stack, &path, &label, &menu_type);

   if (driver.menu->need_refresh && (menu_parse_check(label, menu_type) == -1))
   {
      driver.menu->need_refresh = false;
      menu_entries_push_list(driver.menu,
            driver.menu->selection_buf, path, label, menu_type);
   }

   if (driver.menu_ctx && driver.menu_ctx->render)
      driver.menu_ctx->render();

   /* Have to defer it so we let settings refresh. */
   if (driver.menu->push_start_screen)
   {
      driver.menu->push_start_screen = false;
      file_list_push(driver.menu->menu_stack, "", "help", 0, 0);
   }

   return 0;
}

static int menu_viewport_iterate(unsigned action)
{
   int stride_x = 1, stride_y = 1;
   char msg[64];
   struct retro_game_geometry *geom = NULL;
   const char *base_msg = NULL;
   const char *label = NULL;
   unsigned menu_type = 0;
   rarch_viewport_t *custom = (rarch_viewport_t*)
      &g_extern.console.screen.viewports.custom_vp;

   file_list_get_last(driver.menu->menu_stack, NULL, &label, &menu_type);

   geom = (struct retro_game_geometry*)&g_extern.system.av_info.geometry;

   if (g_settings.video.scale_integer)
   {
      stride_x = geom->base_width;
      stride_y = geom->base_height;
   }

   switch (action)
   {
      case MENU_ACTION_UP:
         if (menu_type == MENU_SETTINGS_CUSTOM_VIEWPORT)
         {
            custom->y -= stride_y;
            custom->height += stride_y;
         }
         else if (custom->height >= (unsigned)stride_y)
            custom->height -= stride_y;

         rarch_main_command(RARCH_CMD_VIDEO_APPLY_STATE_CHANGES);
         break;

      case MENU_ACTION_DOWN:
         if (menu_type == MENU_SETTINGS_CUSTOM_VIEWPORT)
         {
            custom->y += stride_y;
            if (custom->height >= (unsigned)stride_y)
               custom->height -= stride_y;
         }
         else
            custom->height += stride_y;

         rarch_main_command(RARCH_CMD_VIDEO_APPLY_STATE_CHANGES);
         break;

      case MENU_ACTION_LEFT:
         if (menu_type == MENU_SETTINGS_CUSTOM_VIEWPORT)
         {
            custom->x -= stride_x;
            custom->width += stride_x;
         }
         else if (custom->width >= (unsigned)stride_x)
            custom->width -= stride_x;

         rarch_main_command(RARCH_CMD_VIDEO_APPLY_STATE_CHANGES);
         break;

      case MENU_ACTION_RIGHT:
         if (menu_type == MENU_SETTINGS_CUSTOM_VIEWPORT)
         {
            custom->x += stride_x;
            if (custom->width >= (unsigned)stride_x)
               custom->width -= stride_x;
         }
         else
            custom->width += stride_x;

         rarch_main_command(RARCH_CMD_VIDEO_APPLY_STATE_CHANGES);
         break;

      case MENU_ACTION_CANCEL:
         menu_entries_pop(driver.menu->menu_stack);
         if (!strcmp(label, "custom_viewport_2"))
         {
            file_list_push(driver.menu->menu_stack, "", "",
                  MENU_SETTINGS_CUSTOM_VIEWPORT,
                  driver.menu->selection_ptr);
         }
         break;

      case MENU_ACTION_OK:
         menu_entries_pop(driver.menu->menu_stack);
         if (menu_type == MENU_SETTINGS_CUSTOM_VIEWPORT
               && !g_settings.video.scale_integer)
         {
            file_list_push(driver.menu->menu_stack, "",
                  "custom_viewport_2", 0, driver.menu->selection_ptr);
         }
         break;

      case MENU_ACTION_START:
         if (!g_settings.video.scale_integer)
         {
            rarch_viewport_t vp;

            if (driver.video_data && driver.video &&
                  driver.video->viewport_info)
               driver.video->viewport_info(driver.video_data, &vp);

            if (menu_type == MENU_SETTINGS_CUSTOM_VIEWPORT)
            {
               custom->width += custom->x;
               custom->height += custom->y;
               custom->x = 0;
               custom->y = 0;
            }
            else
            {
               custom->width = vp.full_width - custom->x;
               custom->height = vp.full_height - custom->y;
            }

            rarch_main_command(RARCH_CMD_VIDEO_APPLY_STATE_CHANGES);
         }
         break;

      case MENU_ACTION_MESSAGE:
         driver.menu->msg_force = true;
         break;

      default:
         break;
   }

   file_list_get_last(driver.menu->menu_stack, NULL, &label, &menu_type);

   if (driver.video_data && driver.menu_ctx && driver.menu_ctx->render)
      driver.menu_ctx->render();

   if (g_settings.video.scale_integer)
   {
      custom->x = 0;
      custom->y = 0;
      custom->width = ((custom->width + geom->base_width - 1) /
            geom->base_width) * geom->base_width;
      custom->height = ((custom->height + geom->base_height - 1) /
            geom->base_height) * geom->base_height;

      base_msg = "Set scale";
      snprintf(msg, sizeof(msg), "%s (%4ux%4u, %u x %u scale)",
            base_msg,
            custom->width, custom->height,
            custom->width / geom->base_width,
            custom->height / geom->base_height);
   }
   else
   {
      if (menu_type == MENU_SETTINGS_CUSTOM_VIEWPORT)
         base_msg = "Set Upper-Left Corner";
      else if (!strcmp(label, "custom_viewport_2"))
         base_msg = "Set Bottom-Right Corner";

      snprintf(msg, sizeof(msg), "%s (%d, %d : %4ux%4u)",
            base_msg, custom->x, custom->y, custom->width, custom->height);
   }

   if (driver.video_data && driver.menu_ctx &&
         driver.menu_ctx->render_messagebox)
      driver.menu_ctx->render_messagebox(msg);

   if (!custom->width)
      custom->width = stride_x;
   if (!custom->height)
      custom->height = stride_y;

   aspectratio_lut[ASPECT_RATIO_CUSTOM].value =
      (float)custom->width / custom->height;

   rarch_main_command(RARCH_CMD_VIDEO_APPLY_STATE_CHANGES);

   return 0;
}

static int menu_custom_bind_iterate(void *data)
{
   menu_handle_t *menu = (menu_handle_t*)data;
   struct menu_bind_state binds = menu->binds;

   menu_poll_bind_state(&binds);

   if ((binds.skip && !menu->binds.skip) ||
         menu_poll_find_trigger(&menu->binds, &binds))
   {
      binds.begin++;
      if (binds.begin <= binds.last)
         binds.target++;
      else
         menu_entries_pop(driver.menu->menu_stack);

      /* Avoid new binds triggering things right away. */
      menu->trigger_state = 0;
      menu->old_input_state = -1ULL;
   }
   menu->binds = binds;

   return 0;
}

static int menu_custom_bind_iterate_keyboard(void *data,
      int64_t current, int timeout)
{
   bool timed_out = false;
   menu_handle_t *menu = (menu_handle_t*)data;

   if (timeout <= 0)
   {
      menu->binds.begin++;

      /* Could be unsafe, but whatever. */
      menu->binds.target->key = RETROK_UNKNOWN;

      menu->binds.target++;
      menu->binds.timeout_end = rarch_get_time_usec() +
         MENU_KEYBOARD_BIND_TIMEOUT_SECONDS * 1000000;
      timed_out = true;
   }

   /* binds.begin is updated in keyboard_press callback. */
   if (menu->binds.begin > menu->binds.last)
   {
      menu_entries_pop(driver.menu->menu_stack);

      /* Avoid new binds triggering things right away. */
      menu->trigger_state = 0;
      menu->old_input_state = -1ULL;

      /* We won't be getting any key events, so just cancel early. */
      if (timed_out)
         input_keyboard_wait_keys_cancel();
   }

   return 0;
}

static void menu_common_load_content(void)
{
   rarch_main_command(RARCH_CMD_LOAD_CONTENT);
   menu_flush_stack_type(driver.menu->menu_stack,MENU_SETTINGS);
   driver.menu->msg_force = true;
}

static int menu_action_ok(const char *menu_path,
      const char *menu_label, unsigned menu_type)
{
   const char *label = NULL;
   const char *path = NULL;
   unsigned type = 0;
   rarch_setting_t *setting_data = (rarch_setting_t *)
      setting_data_get_list();
   rarch_setting_t *setting = (rarch_setting_t*)
      setting_data_find_setting(setting_data, menu_label);

   (void)hack_shader_pass;

   if (file_list_get_size(driver.menu->selection_buf) == 0)
      return 0;

   file_list_get_at_offset(driver.menu->selection_buf,
         driver.menu->selection_ptr, &path, &label, &type);

#if 0
   RARCH_LOG("menu label: %s\n", menu_label);
   RARCH_LOG("type     : %d\n", type == MENU_FILE_USE_DIRECTORY);
   RARCH_LOG("type id  : %d\n", type);
#endif

   switch (type)
   {
      case MENU_FILE_PLAYLIST_ENTRY:

         rarch_playlist_load_content(g_extern.history,
               driver.menu->selection_ptr);
         menu_flush_stack_type(driver.menu->menu_stack, MENU_SETTINGS);
         return -1;

#ifdef HAVE_COMPRESSION
      case MENU_FILE_IN_CARCHIVE:
#endif
      case MENU_FILE_PLAIN:
         if (!strcmp(menu_label, "detect_core_list"))
         {
            int ret = rarch_defer_core(g_extern.core_info,
                  menu_path, path, driver.menu->deferred_path,
                  sizeof(driver.menu->deferred_path));


            if (ret == -1)
            {

               rarch_main_command(RARCH_CMD_LOAD_CORE);

               menu_common_load_content();

               return -1;
            }
            else if (ret == 0)
               menu_entries_push(driver.menu->menu_stack,
                     g_settings.libretro_directory, "deferred_core_list",
                     0, driver.menu->selection_ptr);
         }
         else if ((setting && setting->type == ST_PATH))
         {
            menu_action_setting_set_current_string_path(setting, menu_path, path);
            menu_entries_pop_stack(driver.menu->menu_stack, setting->name);
         }
         else if (!strcmp(menu_label, "disk_image_append"))
         {
            char image[PATH_MAX];
            fill_pathname_join(image, menu_path, path, sizeof(image));
            rarch_disk_control_append_image(image);

            rarch_main_command(RARCH_CMD_RESUME);

            menu_flush_stack_type(driver.menu->menu_stack,MENU_SETTINGS);
            return -1;
         }
         else
         {
            if (type == MENU_FILE_IN_CARCHIVE)
            {
               fill_pathname_join_delim(g_extern.fullpath, menu_path, path,
                     '#',sizeof(g_extern.fullpath));
            }
            else
            {
               fill_pathname_join(g_extern.fullpath, menu_path, path,
                     sizeof(g_extern.fullpath));
            }

            menu_common_load_content();
            rarch_main_command(RARCH_CMD_LOAD_CONTENT_PERSIST);
            menu_flush_stack_type(driver.menu->menu_stack,MENU_SETTINGS);
            driver.menu->msg_force = true;
            RARCH_LOG("Gets here.\n");

            return -1;
         }

         return 0;

      case MENU_FILE_CONFIG:

         {
            char config[PATH_MAX];
            fill_pathname_join(config, menu_path, path, sizeof(config));
            menu_flush_stack_type(driver.menu->menu_stack,MENU_SETTINGS);
            driver.menu->msg_force = true;
            if (rarch_replace_config(config))
            {
               menu_clear_navigation(driver.menu);
               return -1;
            }
         }

         return 0;

      case MENU_FILE_FONT:
      case MENU_FILE_OVERLAY:
      case MENU_FILE_AUDIOFILTER:
      case MENU_FILE_VIDEOFILTER:

         menu_action_setting_set_current_string_path(setting, menu_path, path);
         menu_entries_pop_stack(driver.menu->menu_stack, setting->name);

         return 0;

      case MENU_FILE_SHADER_PRESET:
#ifdef HAVE_SHADER_MANAGER
         {
            char shader_path[PATH_MAX];
            fill_pathname_join(shader_path, menu_path, path, sizeof(shader_path));
            if (driver.menu_ctx && driver.menu_ctx->backend &&
                  driver.menu_ctx->backend->shader_manager_set_preset)
               driver.menu_ctx->backend->shader_manager_set_preset(
                     driver.menu->shader,
                     gfx_shader_parse_type(shader_path, RARCH_SHADER_NONE),
                     shader_path);
            menu_flush_stack_label(driver.menu->menu_stack, "Shader Options");
         }
#endif
         return 0;
      case MENU_FILE_SHADER:
#ifdef HAVE_SHADER_MANAGER
         fill_pathname_join(driver.menu->shader->pass[hack_shader_pass].source.path,
               menu_path, path,
               sizeof(driver.menu->shader->pass[hack_shader_pass].source.path));

         /* This will reset any changed parameters. */
         gfx_shader_resolve_parameters(NULL, driver.menu->shader);
         menu_flush_stack_label(driver.menu->menu_stack, "Shader Options");
#endif

         return 0;

      case MENU_FILE_CORE:

         if (!strcmp(menu_label, "deferred_core_list"))
         {
            strlcpy(g_settings.libretro, path, sizeof(g_settings.libretro));
            strlcpy(g_extern.fullpath, driver.menu->deferred_path,
                  sizeof(g_extern.fullpath));

            menu_common_load_content();

            return -1;
         }
         else if (!strcmp(menu_label, "core_list"))
         {
            fill_pathname_join(g_settings.libretro, menu_path, path,
                  sizeof(g_settings.libretro));
            rarch_main_command(RARCH_CMD_LOAD_CORE);
            menu_flush_stack_type(driver.menu->menu_stack,MENU_SETTINGS);
#if defined(HAVE_DYNAMIC)
            /* No content needed for this core, load core immediately. */
            if (driver.menu->load_no_content)
            {
               *g_extern.fullpath = '\0';
               menu_common_load_content();
               return -1;
            }

            /* Core selection on non-console just updates directory listing.
             * Will take effect on new content load. */
#elif defined(RARCH_CONSOLE)
            rarch_main_command(RARCH_CMD_RESTART_RETROARCH);
            return -1;
#endif
         }

         return 0;

      case MENU_FILE_USE_DIRECTORY:

         if (setting && setting->type == ST_DIR)
         {
            menu_action_setting_set_current_string(setting, menu_path);
            menu_entries_pop_stack(driver.menu->menu_stack, setting->name);
         }

         return 0;

      case MENU_FILE_DIRECTORY:
      case MENU_FILE_CARCHIVE:

         {
            char cat_path[PATH_MAX];
            fill_pathname_join(cat_path, menu_path, path, sizeof(cat_path));
            menu_entries_push(driver.menu->menu_stack,
                  cat_path, menu_label, type, driver.menu->selection_ptr);
         }

         return 0;
         
   }

   if (menu_parse_check(label, type) == 0)
   {
      char cat_path[PATH_MAX];
      fill_pathname_join(cat_path, menu_path, path, sizeof(cat_path));

      menu_entries_push(driver.menu->menu_stack,
            cat_path, menu_label, type, driver.menu->selection_ptr);
   }

   return 0;
}

static int menu_common_iterate(unsigned action)
{
   int ret = 0;
   unsigned menu_type = 0;
   const char *path = NULL;
   const char *menu_label = NULL;

   file_list_get_last(driver.menu->menu_stack, &path, &menu_label, &menu_type);

   if (driver.video_data && driver.menu_ctx && driver.menu_ctx->set_texture)
      driver.menu_ctx->set_texture(driver.menu);

   if (action == MENU_ACTION_TOGGLE &&
         g_extern.main_is_init && !g_extern.libretro_dummy)
   {
      rarch_main_command(RARCH_CMD_RESUME);
      return -1;
   }

   if (!strcmp(menu_label, "help"))
      return menu_start_screen_iterate(action);
   else if (!strcmp(menu_label, "info_screen"))
      return menu_info_screen_iterate(action);
   else if (menu_common_type_is(menu_label, menu_type) == MENU_SETTINGS)
      return menu_settings_iterate(action);
   else if (
         menu_type == MENU_SETTINGS_CUSTOM_VIEWPORT ||
         !strcmp(menu_label, "custom_viewport_2")
         )
      return menu_viewport_iterate(action);
   else if (
         menu_type == MENU_SETTINGS_CUSTOM_BIND ||
         menu_type == MENU_SETTINGS_CUSTOM_BIND_KEYBOARD
         )
   {
      char msg[PATH_MAX];
      int64_t current;
      int timeout = 0;

      if (driver.video_data && driver.menu_ctx &&
            driver.menu_ctx->render)
         driver.menu_ctx->render();

      if (menu_type == MENU_SETTINGS_CUSTOM_BIND)
      {
         snprintf(msg, sizeof(msg), "[%s]\npress joypad\n(RETURN to skip)",
               input_config_bind_map[
               driver.menu->binds.begin - MENU_SETTINGS_BIND_BEGIN].desc);
      }
      else if (menu_type == MENU_SETTINGS_CUSTOM_BIND_KEYBOARD)
      {
         current = rarch_get_time_usec();
         timeout = (driver.menu->binds.timeout_end - current) / 1000000;
         snprintf(msg, sizeof(msg), "[%s]\npress keyboard\n(timeout %d seconds)",
               input_config_bind_map[
               driver.menu->binds.begin - MENU_SETTINGS_BIND_BEGIN].desc,
               timeout);
      }

      if (driver.video_data && driver.menu_ctx 
            && driver.menu_ctx->render_messagebox)
         driver.menu_ctx->render_messagebox(msg);

      if (menu_type == MENU_SETTINGS_CUSTOM_BIND)
         return menu_custom_bind_iterate(driver.menu);
      else if (menu_type == MENU_SETTINGS_CUSTOM_BIND_KEYBOARD)
         return menu_custom_bind_iterate_keyboard(driver.menu, current, timeout);
   }

   if (driver.menu->need_refresh && action != MENU_ACTION_MESSAGE)
      action = MENU_ACTION_NOOP;

   unsigned scroll_speed = (max(driver.menu->scroll_accel, 2) - 2) / 4 + 1;
   unsigned fast_scroll_speed = 4 + 4 * scroll_speed;

   switch (action)
   {
      case MENU_ACTION_UP:
         if (driver.menu->selection_ptr >= scroll_speed)
            menu_set_navigation(driver.menu,
                  driver.menu->selection_ptr - scroll_speed);
         else
            menu_set_navigation(driver.menu,
                  file_list_get_size(driver.menu->selection_buf) - 1);
         break;

      case MENU_ACTION_DOWN:
         if (driver.menu->selection_ptr + scroll_speed <
               file_list_get_size(driver.menu->selection_buf))
            menu_set_navigation(driver.menu,
                  driver.menu->selection_ptr + scroll_speed);
         else
            menu_clear_navigation(driver.menu);
         break;

      case MENU_ACTION_LEFT:
         if (driver.menu->selection_ptr > fast_scroll_speed)
            menu_set_navigation(driver.menu,
                  driver.menu->selection_ptr - fast_scroll_speed);
         else
            menu_clear_navigation(driver.menu);
         break;

      case MENU_ACTION_RIGHT:
         if (driver.menu->selection_ptr + fast_scroll_speed <
               file_list_get_size(driver.menu->selection_buf))
            menu_set_navigation(driver.menu,
                  driver.menu->selection_ptr + fast_scroll_speed);
         else
            menu_set_navigation_last(driver.menu);
         break;

      case MENU_ACTION_SCROLL_UP:
         menu_descend_alphabet(driver.menu, &driver.menu->selection_ptr);
         break;
      case MENU_ACTION_SCROLL_DOWN:
         menu_ascend_alphabet(driver.menu, &driver.menu->selection_ptr);
         break;

      case MENU_ACTION_CANCEL:
         menu_entries_pop(driver.menu->menu_stack);
         break;

      case MENU_ACTION_OK:
         ret = menu_action_ok(path, menu_label, menu_type);
         break;

      case MENU_ACTION_REFRESH:
         menu_clear_navigation(driver.menu);
         driver.menu->need_refresh = true;
         break;

      case MENU_ACTION_MESSAGE:
         driver.menu->msg_force = true;
         break;

      default:
         break;
   }

   if (driver.menu->need_refresh)
   {
      if (menu_parse_and_resolve(driver.menu->selection_buf,
               driver.menu->menu_stack) == 0)
         driver.menu->need_refresh = false;
   }

   if (driver.menu_ctx && driver.menu_ctx->iterate)
      driver.menu_ctx->iterate(driver.menu, action);

   if (driver.video_data && driver.menu_ctx && driver.menu_ctx->render)
      driver.menu_ctx->render();

   return ret;
}

static void menu_common_setting_set_label(char *type_str,
      size_t type_str_size, unsigned *w, unsigned type, 
      const char *menu_label, const char *label, unsigned index)
{
   setting_data_get_label(type_str, type_str_size, w, 
         type, menu_label, label, index);
}

menu_ctx_driver_backend_t menu_ctx_backend_common = {
   menu_common_iterate,
   menu_common_shader_manager_init,
   menu_common_shader_manager_get_str,
   menu_common_shader_manager_set_preset,
   menu_common_shader_manager_save_preset,
   menu_common_shader_manager_get_type,
   menu_common_shader_manager_setting_toggle,
   menu_common_type_is,
   menu_common_setting_set_label,
   "menu_common",
};