RetroArch/gfx/drivers/ctr_gfx.c

/*  RetroArch - A frontend for libretro.
 *  Copyright (C) 2014-2017 - 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 <stdio.h>
#include <string.h>
#include <malloc.h>

#include <3ds.h>

#include <retro_inline.h>
#include <retro_math.h>
#include <formats/image.h>

#ifdef HAVE_CONFIG_H
#include "../../config.h"
#endif

#ifdef HAVE_MENU
#include "../../menu/menu_driver.h"
#endif
#ifdef HAVE_GFX_WIDGETS
#include "../gfx_widgets.h"
#endif

#include "../font_driver.h"
#include "../../ctr/gpu_old.h"
#include "ctr_gu.h"

#include "../../configuration.h"
#include "../../command.h"
#include "../../driver.h"

#include "../../retroarch.h"
#include "../../verbosity.h"

#include "../common/ctr_common.h"
#ifndef HAVE_THREADS
#include "../../tasks/tasks_internal.h"
#endif

enum
{
   CTR_TEXTURE_BOTTOM_MENU,
   CTR_TEXTURE_STATE_THUMBNAIL,
   CTR_TEXTURE_LAST
};

/* TODO/FIXME - global referenced outside */
extern uint64_t lifecycle_state;

/* An annoyance...
 * Have to keep track of bottom screen enable state
 * externally, otherwise cannot detect current state
 * when reinitialising... */
bool ctr_bottom_screen_enabled = true;
int fadeCount = 256;

static void ctr_set_bottom_screen_enable(bool enabled, bool idle);

static INLINE void ctr_check_3D_slider(ctr_video_t* ctr, ctr_video_mode_enum video_mode)
{
   float slider_val             = *(float*)0x1FF81080;

   if (slider_val == 0.0f)
   {
      ctr->video_mode = CTR_VIDEO_MODE_2D;
      ctr->enable_3d = false;
      return;
   }

   switch (video_mode)
   {
      case CTR_VIDEO_MODE_3D:
         {
            s16 offset = slider_val * 10.0f;

            ctr->video_mode = CTR_VIDEO_MODE_3D;

            ctr->frame_coords[1] = ctr->frame_coords[0];
            ctr->frame_coords[2] = ctr->frame_coords[0];

            ctr->frame_coords[1].x0 -= offset;
            ctr->frame_coords[1].x1 -= offset;
            ctr->frame_coords[2].x0 += offset;
            ctr->frame_coords[2].x1 += offset;

            GSPGPU_FlushDataCache(ctr->frame_coords, 3 * sizeof(ctr_vertex_t));

            if (ctr->supports_parallax_disable)
               ctr_set_parallax_layer(true);
            ctr->enable_3d = true;
         }
         break;
      case CTR_VIDEO_MODE_2D_400X240:
      case CTR_VIDEO_MODE_2D_800X240:
         if (ctr->supports_parallax_disable)
         {
            ctr->video_mode = video_mode;
            ctr_set_parallax_layer(false);
            ctr->enable_3d = true;
         }
         else
         {
            ctr->video_mode = CTR_VIDEO_MODE_2D;
            ctr->enable_3d = false;
         }
         break;
      case CTR_VIDEO_MODE_2D:
      default:
         ctr->video_mode = CTR_VIDEO_MODE_2D;
         if (ctr->supports_parallax_disable)
            ctr_set_parallax_layer(false);
         ctr->enable_3d = false;
         break;
   }
}

static INLINE void ctr_set_screen_coords(ctr_video_t * ctr)
{
   if (ctr->rotation == 0)
   {
      ctr->frame_coords->x0 = ctr->vp.x;
      ctr->frame_coords->y0 = ctr->vp.y;
      ctr->frame_coords->x1 = ctr->vp.x + ctr->vp.width;
      ctr->frame_coords->y1 = ctr->vp.y + ctr->vp.height;
   }
   else if (ctr->rotation == 1) /* 90° */
   {
      ctr->frame_coords->x0 = ctr->vp.x;
      ctr->frame_coords->y0 = ctr->vp.y;
      ctr->frame_coords->x1 = ctr->vp.x + ctr->vp.width;
      ctr->frame_coords->y1 = ctr->vp.y + ctr->vp.height;
   }
   else if (ctr->rotation == 2) /* 180° */
   {
      ctr->frame_coords->x1 = ctr->vp.x;
      ctr->frame_coords->y1 = ctr->vp.y;
      ctr->frame_coords->x0 = ctr->vp.x + ctr->vp.width;
      ctr->frame_coords->y0 = ctr->vp.y + ctr->vp.height;
   }
   else /* 270° */
   {
      ctr->frame_coords->x1 = ctr->vp.x;
      ctr->frame_coords->y1 = ctr->vp.y;
      ctr->frame_coords->x0 = ctr->vp.x + ctr->vp.width;
      ctr->frame_coords->y0 = ctr->vp.y + ctr->vp.height;
   }
}

#ifdef HAVE_OVERLAY
static void ctr_render_overlay(void *data);
static void ctr_free_overlay(ctr_video_t *ctr)
{
   unsigned i;

   for (i = 0; i < ctr->overlays; i++)
   {
      linearFree(ctr->overlay[i].frame_coords);
      linearFree(ctr->overlay[i].texture.data);
   }

   free(ctr->overlay);
   ctr->overlay = NULL;
   ctr->overlays = 0;
}
#endif

static void ctr_update_viewport(
      ctr_video_t* ctr,
      settings_t *settings,
      int custom_vp_x,
      int custom_vp_y,
      unsigned custom_vp_width,
      unsigned custom_vp_height
      )
{
   int x                     = 0;
   int y                     = 0;
   float width               = ctr->vp.full_width;
   float height              = ctr->vp.full_height;
   float desired_aspect      = video_driver_get_aspect_ratio();
   bool video_scale_integer  = settings->bools.video_scale_integer;
   unsigned aspect_ratio_idx = settings->uints.video_aspect_ratio_idx;

   if (ctr->rotation & 0x1)
      desired_aspect = 1.0 / desired_aspect;

   if (video_scale_integer)
   {
      video_viewport_get_scaled_integer(&ctr->vp, ctr->vp.full_width,
            ctr->vp.full_height, desired_aspect, ctr->keep_aspect);
   }
   else if (ctr->keep_aspect)
   {
#if defined(HAVE_MENU)
      if (aspect_ratio_idx == ASPECT_RATIO_CUSTOM)
      {
         x      = custom_vp_x;
         y      = custom_vp_y;
         width  = custom_vp_width;
         height = custom_vp_height;
      }
      else
#endif
      {
         float delta;
         float device_aspect  = ((float)ctr->vp.full_width) / ctr->vp.full_height;

         if (fabsf(device_aspect - desired_aspect) < 0.0001f)
         {
            /* If the aspect ratios of screen and desired aspect
             * ratio are sufficiently equal (floating point stuff),
             * assume they are actually equal.
             */
         }
         else if (device_aspect > desired_aspect)
         {
            delta = (desired_aspect / device_aspect - 1.0f)
               / 2.0f + 0.5f;
            x     = (int)roundf(width * (0.5f - delta));
            width = (unsigned)roundf(2.0f * width * delta);
         }
         else
         {
            delta  = (device_aspect / desired_aspect - 1.0f)
               / 2.0f + 0.5f;
            y      = (int)roundf(height * (0.5f - delta));
            height = (unsigned)roundf(2.0f * height * delta);
         }
      }

      ctr->vp.x      = x;
      ctr->vp.y      = y;
      ctr->vp.width  = width;
      ctr->vp.height = height;
   }
   else
   {
      ctr->vp.x = ctr->vp.y = 0;
      ctr->vp.width = width;
      ctr->vp.height = height;
   }

   ctr_set_screen_coords(ctr);

   ctr->should_resize = false;

}

static const char *ctr_texture_path(unsigned id)
{
   switch (id)
   {
      case CTR_TEXTURE_BOTTOM_MENU:
         return "ctr/bottom_menu.png";
      case CTR_TEXTURE_STATE_THUMBNAIL:
         {
            static char texture_path[PATH_MAX_LENGTH];

            char state_path[PATH_MAX_LENGTH];
            if (!retroarch_get_current_savestate_path(state_path, 
                     sizeof(state_path)))
               return NULL;

            snprintf(texture_path, sizeof(texture_path),
                  "%s.png", state_path);

            return path_basename(texture_path);
         }
   }

   return NULL;
}   

static void ctr_update_state_date(void *data)
{
   ctr_video_t *ctr = (ctr_video_t*)data;

   time_t now = time(NULL);

   struct tm *t = localtime(&now);
   sprintf(ctr->state_date, "%02d/%02d/%d",
      t->tm_mon + 1, t->tm_mday, t->tm_year + 1900);
}

static bool ctr_update_state_date_from_file(void *data)
{
   char state_path[PATH_MAX_LENGTH];
   ctr_video_t *ctr = (ctr_video_t*)data;

   if (!retroarch_get_current_savestate_path(state_path, sizeof(state_path)))
      return false;

#ifdef USE_CTRULIB_2
   time_t mtime;
   bool file_exists = archive_getmtime(state_path + 5, &mtime) == 0;
#else
   u64 mtime;
   bool file_exists = sdmc_getmtime(state_path + 5, &mtime) == 0;
#endif 
   if (!file_exists)
   {
      ctr->state_data_exist = false;
      snprintf(ctr->state_date, sizeof(ctr->state_date), "00/00/0000");
      return false;
   }

   ctr->state_data_exist = true;

#ifdef USE_CTRULIB_2
   struct tm *t = localtime(&mtime);
#else
   time_t ft = mtime;
   struct tm *t = localtime(&ft);
#endif
   sprintf(ctr->state_date, "%02d/%02d/%d",
      t->tm_mon + 1, t->tm_mday, t->tm_year + 1900);
      
  return true;
}

static void ctr_state_thumbnail_geom(void *data)
{
   ctr_video_t *ctr = (ctr_video_t *) data;
   struct ctr_bottom_texture_data *o = NULL;
   const int target_width = 120;
   const int target_height = 90;
   unsigned width, height;

   if (ctr)
      o = &ctr->bottom_textures[CTR_TEXTURE_STATE_THUMBNAIL];

   if (!o)
      return;

   ctr_texture_t *texture = (ctr_texture_t *) o->texture;
   if (!texture)
      return;

   float scale = (float) target_width / texture->active_width;
   if (target_width > texture->active_width * scale) {
      scale = (float) (target_width + 1) / texture->active_width;
   }

   o->frame_coords->u0 = 0;
   o->frame_coords->v0 = 0;
   o->frame_coords->u1 = texture->active_width;
   o->frame_coords->v1 = texture->active_height;

   int x_offset = 184;
   int y_offset = 46 + (target_height - texture->active_height * scale) / 2;

   o->frame_coords->x0 = x_offset;
   o->frame_coords->y0 = y_offset;
   o->frame_coords->x1 = o->frame_coords->x0 + texture->active_width * scale;
   o->frame_coords->y1 = o->frame_coords->y0 + texture->active_height * scale;

   ctr_set_scale_vector(&o->scale_vector,
         CTR_BOTTOM_FRAMEBUFFER_WIDTH,
         CTR_BOTTOM_FRAMEBUFFER_HEIGHT,
         texture->width,
         texture->height);
}

static bool ctr_load_bottom_texture(void *data)
{
   unsigned i;
   const char *dir_assets;

   ctr_video_t *ctr = (ctr_video_t *)data;
   settings_t *settings = config_get_ptr();

   for (i = 0; i < CTR_TEXTURE_LAST; i++)
   {
      if (i == CTR_TEXTURE_STATE_THUMBNAIL)
         dir_assets = dir_get_ptr(RARCH_DIR_SAVESTATE);
      else
         dir_assets = settings->paths.directory_assets;

      if (gfx_display_reset_textures_list(
         ctr_texture_path(i), dir_assets,
         &ctr->bottom_textures[i].texture,
         TEXTURE_FILTER_MIPMAP_LINEAR, NULL, NULL))
      {
         struct ctr_bottom_texture_data *o = &ctr->bottom_textures[i];
         o->frame_coords = linearAlloc(sizeof(ctr_vertex_t));

         if (i == CTR_TEXTURE_STATE_THUMBNAIL)
         {
            ctr_state_thumbnail_geom(ctr);
            ctr->render_state_from_png_file = true;
         }
         else
         {
            ctr_texture_t *texture = (ctr_texture_t *) o->texture;

            o->frame_coords->u0 = 0;
            o->frame_coords->v0 = 0;
            o->frame_coords->u1 = texture->width;
            o->frame_coords->v1 = texture->height;

            o->frame_coords->x0 = 0;
            o->frame_coords->y0 = 0;
            o->frame_coords->x1 = o->frame_coords->x0 + texture->width;
            o->frame_coords->y1 = o->frame_coords->y0 + texture->height;

            ctr_set_scale_vector(&o->scale_vector,
                  CTR_BOTTOM_FRAMEBUFFER_WIDTH,
                  CTR_BOTTOM_FRAMEBUFFER_HEIGHT,
                  texture->width,
                  texture->height);
         }
      }
      else if (i == CTR_TEXTURE_BOTTOM_MENU)
         return false;
   }

   return true;
}

static void save_state_to_file(void *data)
{
   ctr_video_t *ctr = (ctr_video_t*)data;

   char state_path[PATH_MAX_LENGTH];
   retroarch_get_current_savestate_path(state_path, sizeof(state_path));

   command_event(CMD_EVENT_RAM_STATE_TO_FILE, state_path);
}

static void bottom_menu_control(void* data, bool lcd_bottom)
{
   touchPosition state_tmp_touch;
   uint32_t state_tmp = 0;
   ctr_video_t *ctr = (ctr_video_t*)data;
   settings_t *settings = config_get_ptr();
   int config_slot = settings->ints.state_slot;

   if (!ctr->init_bottom_menu)
   {
      if (ctr_load_bottom_texture(ctr))
      {
         ctr_update_state_date_from_file(ctr);
         ctr->bottom_menu = CTR_BOTTOM_MENU_DEFAULT;
      }

      ctr->init_bottom_menu = true;
   }

   BIT64_CLEAR(lifecycle_state, RARCH_MENU_TOGGLE);

   if (!retroarch_ctl(RARCH_CTL_CORE_IS_RUNNING, NULL))
   {
      if (!ctr->bottom_is_idle)
      {
         ctr->bottom_is_idle = true;
         ctr_set_bottom_screen_enable(false, ctr->bottom_is_idle);
      }
      return;
   }

   state_tmp = hidKeysDown();
   hidTouchRead(&state_tmp_touch);
   if (!state_tmp)
   {
      if (!ctr->bottom_check_idle && !ctr->bottom_is_idle)
      {
         ctr->idle_timestamp = svcGetSystemTick();
         ctr->bottom_check_idle = true;
      }
   }
   if (state_tmp & KEY_TOUCH)
   {
#ifdef CONSOLE_LOG
      BIT64_SET(lifecycle_state, RARCH_MENU_TOGGLE);
      return;
#endif

      if (!lcd_bottom ||
         ctr->bottom_menu == CTR_BOTTOM_MENU_NOT_AVAILABLE)
      {
         BIT64_SET(lifecycle_state, RARCH_MENU_TOGGLE);
         return;
      }

      if (ctr->bottom_is_idle)
      {
         ctr->bottom_is_idle   = false;
         ctr->bottom_is_fading = false;
         fadeCount = 256;
         ctr_set_bottom_screen_enable(true,true);
      }
      else if (ctr->bottom_check_idle)
      {
         ctr->bottom_check_idle = false;
         ctr->bottom_is_fading  = false;
         fadeCount = 256;
      }

      switch (ctr->bottom_menu)
      {
         case CTR_BOTTOM_MENU_DEFAULT:
            BIT64_SET(lifecycle_state, RARCH_MENU_TOGGLE);
            break;
         case CTR_BOTTOM_MENU_SELECT:
            if (state_tmp_touch.px > 8 &&
                  state_tmp_touch.px < 164 &&
                  state_tmp_touch.py > 9 &&
                  state_tmp_touch.py < 86)
            {
               BIT64_SET(lifecycle_state, RARCH_MENU_TOGGLE);
            }
            else if (state_tmp_touch.px > 8 &&
                  state_tmp_touch.px < 164 &&
                  state_tmp_touch.py > 99 &&
                  state_tmp_touch.py < 230) 
            {
               char screenshot_full_path[PATH_MAX_LENGTH];

               struct ctr_bottom_texture_data *o =
                  &ctr->bottom_textures[CTR_TEXTURE_STATE_THUMBNAIL];

               ctr_texture_t *texture = (ctr_texture_t *) o->texture;
               if (texture)
                  linearFree(texture->data);
               else
               {
                  o->texture = (uintptr_t) calloc(1, sizeof(ctr_texture_t));
                  o->frame_coords = linearAlloc(sizeof(ctr_vertex_t));
                  texture = (ctr_texture_t *) o->texture;
               }

               texture->width = ctr->texture_width;
               texture->height = ctr->texture_width;
               texture->active_width = ctr->frame_coords->u1;
               texture->active_height = ctr->frame_coords->v1;

               texture->data = linearAlloc(
                     ctr->texture_width * ctr->texture_height * 
                     (ctr->rgb32? 4:2));

               memcpy(texture->data, ctr->texture_swizzled, 
                     ctr->texture_width * ctr->texture_height * 
                     (ctr->rgb32? 4:2));

               ctr_state_thumbnail_geom(ctr);

               ctr->state_data_exist = true;
               ctr->render_state_from_png_file = false;

               ctr_update_state_date(ctr);

               command_event(CMD_EVENT_SAVE_STATE_TO_RAM, NULL);

               if (settings->bools.savestate_thumbnail_enable)
               {
                  sprintf(screenshot_full_path, "%s/%s",
                     dir_get_ptr(RARCH_DIR_SAVESTATE),
                     ctr_texture_path(CTR_TEXTURE_STATE_THUMBNAIL));

                  take_screenshot(NULL, screenshot_full_path, true,
                     video_driver_cached_frame_has_valid_framebuffer(),
                     true, true);
               }

               BIT64_SET(lifecycle_state, RARCH_MENU_TOGGLE);
            }
            else if (state_tmp_touch.px > 176 &&
                  state_tmp_touch.px < 311 &&
                  state_tmp_touch.py > 9 &&
                  state_tmp_touch.py < 230 &&
                  ctr->state_data_exist) 
            {
               if (!command_event(CMD_EVENT_LOAD_STATE_FROM_RAM, NULL))
                  command_event(CMD_EVENT_LOAD_STATE, NULL);
               BIT64_SET(lifecycle_state, RARCH_MENU_TOGGLE);
            }
            break;
      }
      ctr->bottom_check_idle   = false;
      ctr->refresh_bottom_menu = true;
   }

   if (ctr->bottom_menu == CTR_BOTTOM_MENU_NOT_AVAILABLE ||
         !retroarch_ctl(RARCH_CTL_CORE_IS_RUNNING, NULL))
      return;


   if (ctr->state_slot != config_slot)
   {
      save_state_to_file(ctr);

      ctr->state_slot = config_slot;

      struct ctr_bottom_texture_data *o = &ctr->bottom_textures[CTR_TEXTURE_STATE_THUMBNAIL];
      ctr_texture_t *texture = (ctr_texture_t *) o->texture;

      if (texture)
      {
         linearFree(texture->data);
         linearFree(o->frame_coords);
         o->texture = 0;
      }

      if (ctr_update_state_date_from_file(ctr))
      {
         if(gfx_display_reset_textures_list(
                  ctr_texture_path(CTR_TEXTURE_STATE_THUMBNAIL),
                  dir_get_ptr(RARCH_DIR_SAVESTATE),
                  &o->texture,
                  TEXTURE_FILTER_MIPMAP_LINEAR, NULL, NULL))
         {
            o->frame_coords = linearAlloc(sizeof(ctr_vertex_t));
            ctr_state_thumbnail_geom(ctr);
            ctr->render_state_from_png_file = true;
         }
      }

      ctr->refresh_bottom_menu = true;
   }

#ifdef HAVE_MENU
   if (menu_state_get_ptr()->alive)
      ctr->bottom_menu = CTR_BOTTOM_MENU_SELECT;
   else
#endif
      ctr->bottom_menu = CTR_BOTTOM_MENU_DEFAULT;

   if (ctr->prev_bottom_menu != ctr->bottom_menu)
   {
      ctr->prev_bottom_menu    = ctr->bottom_menu;
      ctr->refresh_bottom_menu = true;
   }
}

static void font_driver_render_msg_bottom(
      void *data,         
      const char *msg,    
      const void *_params,
      void *font_data)    
{
   ctr_video_t *ctr = (ctr_video_t*)data;

   ctr->render_font_bottom = true;
   font_driver_render_msg(ctr, msg, _params, font_data);
   ctr->render_font_bottom = false;
}

static void ctr_render_bottom_screen(void *data)
{
   ctr_video_t *ctr = (ctr_video_t*)data;

   if (!ctr)
      return;

   if (!ctr->refresh_bottom_menu)
      return;

   struct font_params params = { 0, };
   params.text_align = TEXT_ALIGN_CENTER;
   params.color = COLOR_ABGR(255, 255, 255, 255);

   switch (ctr->bottom_menu)
   {
      case CTR_BOTTOM_MENU_NOT_AVAILABLE:
         {
            params.scale = 1.6f;
            params.x = 0.0f;
            params.y = 0.5f;

            font_driver_render_msg_bottom(ctr,
               msg_hash_to_str(MSG_3DS_BOTTOM_MENU_ASSET_NOT_FOUND),
               &params, NULL);
         }
         break;
      case CTR_BOTTOM_MENU_DEFAULT:
         {
            params.scale = 1.6f;
            params.x = 0.0f;
            params.y = 0.5f;

            font_driver_render_msg_bottom(ctr,
               msg_hash_to_str(MSG_3DS_BOTTOM_MENU_DEFAULT),
               &params, NULL);
         }
         break;
      case CTR_BOTTOM_MENU_SELECT:
         {
            params.scale = 1.48f;
            params.color = COLOR_ABGR(255, 255, 255, 255);

            /* draw state thumbnail */
            if (ctr->state_data_exist) {
               struct ctr_bottom_texture_data *o = (struct ctr_bottom_texture_data*)
                  &ctr->bottom_textures[CTR_TEXTURE_STATE_THUMBNAIL];

               ctr_texture_t *texture = (ctr_texture_t *) o->texture;
               if (texture)
               {
                  GPU_TEXCOLOR colorType = GPU_RGBA8;
                  if (!ctr->render_state_from_png_file && !ctr->rgb32)
                     colorType = GPU_RGB565;

                  ctrGuSetTexture(GPU_TEXUNIT0, VIRT_TO_PHYS(texture->data),
                        texture->width, texture->height,
                        GPU_TEXTURE_MAG_FILTER(GPU_LINEAR) | GPU_TEXTURE_MIN_FILTER(GPU_LINEAR) |
                        GPU_TEXTURE_WRAP_S(GPU_CLAMP_TO_EDGE) | GPU_TEXTURE_WRAP_T(GPU_CLAMP_TO_EDGE),
                        colorType);

                  GPUCMD_AddWrite(GPUREG_GSH_BOOLUNIFORM, 0);
                  ctrGuSetVertexShaderFloatUniform(0, (float*)&o->scale_vector, 1);
                  ctrGuSetAttributeBuffersAddress(VIRT_TO_PHYS(o->frame_coords));

                  GPU_SetViewport(NULL,
                        VIRT_TO_PHYS(ctr->drawbuffers.bottom),
                        0, 0, CTR_BOTTOM_FRAMEBUFFER_HEIGHT,
                        CTR_BOTTOM_FRAMEBUFFER_WIDTH);
                  GPU_DrawArray(GPU_GEOMETRY_PRIM, 0, 1);
               }
               else
               {
                  params.x = 0.266f;
                  params.y = 0.64f;
                  font_driver_render_msg_bottom(ctr, 
                     msg_hash_to_str(MSG_3DS_BOTTOM_MENU_NO_STATE_THUMBNAIL),
                     &params, NULL);
               }
            }
            else
            {
               params.x = 0.266f;
               params.y = 0.64f;
               font_driver_render_msg_bottom(ctr, 
                  msg_hash_to_str(MSG_3DS_BOTTOM_MENU_NO_STATE_DATA),
                  &params, NULL);
            }

            /* draw bottom menu */
            struct ctr_bottom_texture_data *o = &ctr->bottom_textures[CTR_TEXTURE_BOTTOM_MENU];
            ctr_texture_t *texture = (ctr_texture_t *) o->texture;

            ctrGuSetTexture(GPU_TEXUNIT0, VIRT_TO_PHYS(texture->data),
                  texture->width, texture->height,
                  GPU_TEXTURE_MAG_FILTER(GPU_LINEAR) | GPU_TEXTURE_MIN_FILTER(GPU_LINEAR) |
                  GPU_TEXTURE_WRAP_S(GPU_CLAMP_TO_EDGE) | GPU_TEXTURE_WRAP_T(GPU_CLAMP_TO_EDGE),
                  GPU_RGBA8);

            GPUCMD_AddWrite(GPUREG_GSH_BOOLUNIFORM, 0);
            ctrGuSetVertexShaderFloatUniform(0, (float*)&o->scale_vector, 1);
            ctrGuSetAttributeBuffersAddress(VIRT_TO_PHYS(o->frame_coords));

            GPU_SetViewport(NULL,
                  VIRT_TO_PHYS(ctr->drawbuffers.bottom),
                  0, 0, CTR_BOTTOM_FRAMEBUFFER_HEIGHT,
                  CTR_BOTTOM_FRAMEBUFFER_WIDTH);
            GPU_DrawArray(GPU_GEOMETRY_PRIM, 0, 1);

            /* draw resume game */
            params.x = -0.178f;
            params.y = 0.78f;

            font_driver_render_msg_bottom(ctr, 
               msg_hash_to_str(MSG_3DS_BOTTOM_MENU_RESUME),
               &params, NULL);

            /* draw create restore point */
            params.x = -0.178f;
            params.y = 0.33f;

            font_driver_render_msg_bottom(ctr, 
               msg_hash_to_str(MSG_3DS_BOTTOM_MENU_SAVE_STATE),
               &params, NULL);

            /* draw load restore point */
            params.x = 0.266f;
            params.y = 0.24f;

            font_driver_render_msg_bottom(ctr, 
               msg_hash_to_str(MSG_3DS_BOTTOM_MENU_LOAD_STATE),
               &params, NULL);

            /* draw date */
            params.x = 0.266f;
            params.y = 0.87f;
            font_driver_render_msg_bottom(ctr, ctr->state_date,
               &params, NULL);
         }
         break;
   }
}

// graphic function originates from here:
// https://github.com/smealum/3ds_hb_menu/blob/master/source/gfx.c
void ctr_fade_bottom_screen(gfxScreen_t screen, gfx3dSide_t side, u32 f)
{
   u16 fbWidth, fbHeight;
   u8* fbAdr=gfxGetFramebuffer(screen, side, &fbWidth, &fbHeight);

   int i; for(i=0; i<fbWidth*fbHeight/2; i++)
   {
      *fbAdr=(*fbAdr*f)>>8;fbAdr++;
      *fbAdr=(*fbAdr*f)>>8;fbAdr++;
      *fbAdr=(*fbAdr*f)>>8;fbAdr++;
      *fbAdr=(*fbAdr*f)>>8;fbAdr++;
      *fbAdr=(*fbAdr*f)>>8;fbAdr++;
      *fbAdr=(*fbAdr*f)>>8;fbAdr++;
   }
}

static void ctr_set_bottom_screen_idle(ctr_video_t * ctr)
{
   if (ctr->bottom_menu == CTR_BOTTOM_MENU_SELECT)
      return;

   u64 elapsed_tick = ( svcGetSystemTick() - ctr->idle_timestamp );
   if ( elapsed_tick > 2000000000 )
   {
      if (!ctr->bottom_is_fading)
	  {
         ctr->bottom_is_fading    = true;
         ctr->refresh_bottom_menu = true;
         return;
      }

      if ( fadeCount > 0 )
      {
         fadeCount--;
         ctr_fade_bottom_screen(GFX_BOTTOM, GFX_LEFT, fadeCount);

         if ( fadeCount <= 128 )
         {
            ctr->bottom_is_idle    = true;
            ctr->bottom_is_fading  = false;
            ctr->bottom_check_idle = false;
            fadeCount = 256;
            ctr_set_bottom_screen_enable(false,true);
            return;
         }
      }
   }
}

static void ctr_set_bottom_screen_enable(bool enabled, bool idle)
{
   Handle lcd_handle;
   u8 not_2DS;

   CFGU_GetModelNintendo2DS(&not_2DS);
   if(not_2DS && srvGetServiceHandle(&lcd_handle, "gsp::Lcd") >= 0)
   {
      u32 *cmdbuf = getThreadCommandBuffer();
      cmdbuf[0] = enabled? 0x00110040:  0x00120040;
      cmdbuf[1] = 2;
      svcSendSyncRequest(lcd_handle);
      svcCloseHandle(lcd_handle);
   }

   if (!idle)
      ctr_bottom_screen_enabled = enabled;
}

static void ctr_lcd_aptHook(APT_HookType hook, void* param)
{
   ctr_video_t *ctr  = (ctr_video_t*)param;

   if (!ctr)
      return;

   if (hook == APTHOOK_ONRESTORE)
   {
      GPUCMD_SetBufferOffset(0);
      shaderProgramUse(&ctr->shader);

      GPU_SetViewport(NULL,
                      VIRT_TO_PHYS(ctr->drawbuffers.top.left),
                      0, 0, CTR_TOP_FRAMEBUFFER_HEIGHT, CTR_TOP_FRAMEBUFFER_WIDTH);

      GPU_DepthMap(-1.0f, 0.0f);
      GPU_SetFaceCulling(GPU_CULL_NONE);
      GPU_SetStencilTest(false, GPU_ALWAYS, 0x00, 0xFF, 0x00);
      GPU_SetStencilOp(GPU_STENCIL_KEEP, GPU_STENCIL_KEEP, GPU_STENCIL_KEEP);
      GPU_SetBlendingColor(0, 0, 0, 0);
      GPU_SetDepthTestAndWriteMask(false, GPU_ALWAYS, GPU_WRITE_COLOR);
      GPUCMD_AddMaskedWrite(GPUREG_EARLYDEPTH_TEST1, 0x1, 0);
      GPUCMD_AddWrite(GPUREG_EARLYDEPTH_TEST2, 0);
      GPU_SetAlphaBlending(GPU_BLEND_ADD, GPU_BLEND_ADD,
                           GPU_SRC_ALPHA, GPU_ONE_MINUS_SRC_ALPHA,
                           GPU_SRC_ALPHA, GPU_ONE_MINUS_SRC_ALPHA);
      GPU_SetAlphaTest(false, GPU_ALWAYS, 0x00);
      GPU_SetTextureEnable(GPU_TEXUNIT0);
      GPU_SetTexEnv(0, GPU_TEXTURE0, GPU_TEXTURE0, 0, 0, GPU_REPLACE, GPU_REPLACE, 0);
      GPU_SetTexEnv(1, GPU_PREVIOUS, GPU_PREVIOUS, 0, 0, 0, 0, 0);
      GPU_SetTexEnv(2, GPU_PREVIOUS, GPU_PREVIOUS, 0, 0, 0, 0, 0);
      GPU_SetTexEnv(3, GPU_PREVIOUS, GPU_PREVIOUS, 0, 0, 0, 0, 0);
      GPU_SetTexEnv(4, GPU_PREVIOUS, GPU_PREVIOUS, 0, 0, 0, 0, 0);
      GPU_SetTexEnv(5, GPU_PREVIOUS, GPU_PREVIOUS, 0, 0, 0, 0, 0);
      ctrGuSetAttributeBuffers(2,
                               VIRT_TO_PHYS(ctr->menu.frame_coords),
                               CTRGU_ATTRIBFMT(GPU_SHORT, 4) << 0 |
                               CTRGU_ATTRIBFMT(GPU_SHORT, 4) << 4,
                               sizeof(ctr_vertex_t));
      GPU_Finalize();
      ctrGuFlushAndRun(true);
      gspWaitForEvent(GSPGPU_EVENT_P3D, false);
      ctr->p3d_event_pending = false;
   }

   switch (hook)
   {
      case APTHOOK_ONSUSPEND:
         if (ctr->video_mode == CTR_VIDEO_MODE_2D_400X240)
         {
            memcpy(gfxTopRightFramebuffers[ctr->current_buffer_top],
               gfxTopLeftFramebuffers[ctr->current_buffer_top],
               400 * 240 * 3);
            GSPGPU_FlushDataCache(gfxTopRightFramebuffers[ctr->current_buffer_top], 400 * 240 * 3);
         }
         if (ctr->supports_parallax_disable)
            ctr_set_parallax_layer(*(float*)0x1FF81080 != 0.0);
         ctr_set_bottom_screen_enable(true, ctr->bottom_is_idle);
         save_state_to_file(ctr);
         break;  
      case APTHOOK_ONRESTORE:
      case APTHOOK_ONWAKEUP:
         ctr_set_bottom_screen_enable(false, ctr->bottom_is_idle);
         save_state_to_file(ctr);
         break;
      default:
         break;
   }

   
#ifdef HAVE_MENU
   if (menu_state_get_ptr()->alive)
      return;
#endif

   switch (hook)
   {
      case APTHOOK_ONSUSPEND:
      case APTHOOK_ONSLEEP:
         command_event(CMD_EVENT_AUDIO_STOP, NULL);
         break;
      case APTHOOK_ONRESTORE:
      case APTHOOK_ONWAKEUP:
         command_event(CMD_EVENT_AUDIO_START, NULL);
         break;
   }
}

static void ctr_vsync_hook(ctr_video_t* ctr)
{
   ctr->vsync_event_pending = false;
}

#ifndef HAVE_THREADS
static bool ctr_tasks_finder(retro_task_t *task,void *userdata)
{
   return task;
}

task_finder_data_t ctr_tasks_finder_data = {ctr_tasks_finder, NULL};
#endif


static void* ctr_init(const video_info_t* video,
      input_driver_t** input, void** input_data)
{
   size_t i;
   float refresh_rate;
   u8 device_model      = 0xFF;
   void* ctrinput       = NULL;
   settings_t *settings = config_get_ptr();
   bool lcd_bottom      = settings->bools.video_3ds_lcd_bottom;
   ctr_video_t* ctr     = (ctr_video_t*)linearAlloc(sizeof(ctr_video_t));

   if (!ctr)
      return NULL;

   memset(ctr, 0, sizeof(ctr_video_t));

   ctr->vp.x                = 0;
   ctr->vp.y                = 0;
   ctr->vp.width            = CTR_TOP_FRAMEBUFFER_WIDTH;
   ctr->vp.height           = CTR_TOP_FRAMEBUFFER_HEIGHT;
   ctr->vp.full_width       = CTR_TOP_FRAMEBUFFER_WIDTH;
   ctr->vp.full_height      = CTR_TOP_FRAMEBUFFER_HEIGHT;
   video_driver_set_size(ctr->vp.width, ctr->vp.height);

   ctr->drawbuffers.top.left = vramAlloc(CTR_TOP_FRAMEBUFFER_WIDTH * CTR_TOP_FRAMEBUFFER_HEIGHT * 2 * sizeof(uint32_t));
   ctr->drawbuffers.top.right = (void*)((uint32_t*)ctr->drawbuffers.top.left + CTR_TOP_FRAMEBUFFER_WIDTH * CTR_TOP_FRAMEBUFFER_HEIGHT);
   ctr->drawbuffers.bottom = vramAlloc(CTR_BOTTOM_FRAMEBUFFER_WIDTH * CTR_BOTTOM_FRAMEBUFFER_HEIGHT * 2 * sizeof(uint32_t));

   ctr->display_list_size = 0x4000;
   ctr->display_list = linearAlloc(ctr->display_list_size * sizeof(uint32_t));
   GPU_Reset(NULL, ctr->display_list, ctr->display_list_size);

   ctr->vertex_cache.size = 0x1000;
   ctr->vertex_cache.buffer = linearAlloc(ctr->vertex_cache.size * sizeof(ctr_vertex_t));
   ctr->vertex_cache.current = ctr->vertex_cache.buffer;

   ctr->bottom_textures = (struct ctr_bottom_texture_data *)calloc(CTR_TEXTURE_LAST,
      sizeof(*ctr->bottom_textures));

   ctr->init_bottom_menu = false;
   ctr->state_data_exist = false;
   ctr->render_font_bottom = false;
   ctr->refresh_bottom_menu = true;
   ctr->render_state_from_png_file = false;
   ctr->bottom_menu = CTR_BOTTOM_MENU_NOT_AVAILABLE;
   ctr->prev_bottom_menu = CTR_BOTTOM_MENU_NOT_AVAILABLE;
   ctr->bottom_check_idle = false;
   ctr->bottom_is_idle = false;
   ctr->bottom_is_fading = false;
   ctr->idle_timestamp = 0;
   ctr->state_slot = settings->ints.state_slot;

   snprintf(ctr->state_date, sizeof(ctr->state_date), "%s", "00/00/0000");
   ctr->state_date[CTR_STATE_DATE_SIZE - 1] = '\0';

   ctr->rgb32 = video->rgb32;
   ctr->texture_width = video->input_scale * RARCH_SCALE_BASE;
   ctr->texture_height = video->input_scale * RARCH_SCALE_BASE;
   ctr->texture_linear =
         linearMemAlign(ctr->texture_width * ctr->texture_height * (ctr->rgb32? 4:2), 128);
   ctr->texture_swizzled =
         linearMemAlign(ctr->texture_width * ctr->texture_height * (ctr->rgb32? 4:2), 128);

   ctr->frame_coords = linearAlloc(3 * sizeof(ctr_vertex_t));
   ctr->frame_coords->x0 = 0;
   ctr->frame_coords->y0 = 0;
   ctr->frame_coords->x1 = CTR_TOP_FRAMEBUFFER_WIDTH;
   ctr->frame_coords->y1 = CTR_TOP_FRAMEBUFFER_HEIGHT;
   ctr->frame_coords->u0 = 0;
   ctr->frame_coords->v0 = 0;
   ctr->frame_coords->u1 = CTR_TOP_FRAMEBUFFER_WIDTH;
   ctr->frame_coords->v1 = CTR_TOP_FRAMEBUFFER_HEIGHT;
   GSPGPU_FlushDataCache(ctr->frame_coords, sizeof(ctr_vertex_t));

   ctr->menu.texture_width = 512;
   ctr->menu.texture_height = 512;
   ctr->menu.texture_linear =
         linearMemAlign(ctr->menu.texture_width * ctr->menu.texture_height * sizeof(uint16_t), 128);
   ctr->menu.texture_swizzled =
         linearMemAlign(ctr->menu.texture_width * ctr->menu.texture_height * sizeof(uint16_t), 128);

   ctr->menu.frame_coords = linearAlloc(sizeof(ctr_vertex_t));

   ctr->menu.frame_coords->x0 = 40;
   ctr->menu.frame_coords->y0 = 0;
   ctr->menu.frame_coords->x1 = CTR_TOP_FRAMEBUFFER_WIDTH - 40;
   ctr->menu.frame_coords->y1 = CTR_TOP_FRAMEBUFFER_HEIGHT;
   ctr->menu.frame_coords->u0 = 0;
   ctr->menu.frame_coords->v0 = 0;
   ctr->menu.frame_coords->u1 = CTR_TOP_FRAMEBUFFER_WIDTH - 80;
   ctr->menu.frame_coords->v1 = CTR_TOP_FRAMEBUFFER_HEIGHT;
   GSPGPU_FlushDataCache(ctr->menu.frame_coords, sizeof(ctr_vertex_t));

   ctr_set_scale_vector(&ctr->scale_vector,
                        CTR_TOP_FRAMEBUFFER_WIDTH, CTR_TOP_FRAMEBUFFER_HEIGHT,
                        ctr->texture_width, ctr->texture_height);
   ctr_set_scale_vector(&ctr->menu.scale_vector,
                        CTR_TOP_FRAMEBUFFER_WIDTH, CTR_TOP_FRAMEBUFFER_HEIGHT,
                        ctr->menu.texture_width, ctr->menu.texture_height);

   memset(ctr->texture_linear, 0x00, ctr->texture_width * ctr->texture_height * (ctr->rgb32? 4:2));
#if 0
   memset(ctr->menu.texture_swizzled , 0x00, ctr->menu.texture_width * ctr->menu.texture_height * 2);
#endif

   ctr->dvlb = DVLB_ParseFile((u32*)ctr_sprite_shbin, ctr_sprite_shbin_size);
   ctrGuSetVshGsh(&ctr->shader, ctr->dvlb, 2, 2);
   shaderProgramUse(&ctr->shader);

   GPU_SetViewport(NULL,
                   VIRT_TO_PHYS(ctr->drawbuffers.top.left),
                   0, 0, CTR_TOP_FRAMEBUFFER_HEIGHT, CTR_TOP_FRAMEBUFFER_WIDTH);

   GPU_DepthMap(-1.0f, 0.0f);
   GPU_SetFaceCulling(GPU_CULL_NONE);
   GPU_SetStencilTest(false, GPU_ALWAYS, 0x00, 0xFF, 0x00);
   GPU_SetStencilOp(GPU_STENCIL_KEEP, GPU_STENCIL_KEEP, GPU_STENCIL_KEEP);
   GPU_SetBlendingColor(0, 0, 0, 0);
#if 0
   GPU_SetDepthTestAndWriteMask(true, GPU_GREATER, GPU_WRITE_ALL);
#endif
   GPU_SetDepthTestAndWriteMask(false, GPU_ALWAYS, GPU_WRITE_COLOR);
#if 0
   GPU_SetDepthTestAndWriteMask(true, GPU_ALWAYS, GPU_WRITE_ALL);
#endif

   GPUCMD_AddMaskedWrite(GPUREG_EARLYDEPTH_TEST1, 0x1, 0);
   GPUCMD_AddWrite(GPUREG_EARLYDEPTH_TEST2, 0);

   GPU_SetAlphaBlending(GPU_BLEND_ADD, GPU_BLEND_ADD,
                        GPU_SRC_ALPHA, GPU_ONE_MINUS_SRC_ALPHA,
                        GPU_SRC_ALPHA, GPU_ONE_MINUS_SRC_ALPHA);
   GPU_SetAlphaTest(false, GPU_ALWAYS, 0x00);

   GPU_SetTextureEnable(GPU_TEXUNIT0);

   GPU_SetTexEnv(0, GPU_TEXTURE0, GPU_TEXTURE0, 0, 0, GPU_REPLACE, GPU_REPLACE, 0);
   GPU_SetTexEnv(1, GPU_PREVIOUS, GPU_PREVIOUS, 0, 0, 0, 0, 0);
   GPU_SetTexEnv(2, GPU_PREVIOUS, GPU_PREVIOUS, 0, 0, 0, 0, 0);
   GPU_SetTexEnv(3, GPU_PREVIOUS, GPU_PREVIOUS, 0, 0, 0, 0, 0);
   GPU_SetTexEnv(4, GPU_PREVIOUS, GPU_PREVIOUS, 0, 0, 0, 0, 0);
   GPU_SetTexEnv(5, GPU_PREVIOUS, GPU_PREVIOUS, 0, 0, 0, 0, 0);

   ctrGuSetAttributeBuffers(2,
                            VIRT_TO_PHYS(ctr->menu.frame_coords),
                            CTRGU_ATTRIBFMT(GPU_SHORT, 4) << 0 |
                            CTRGU_ATTRIBFMT(GPU_SHORT, 4) << 4,
                            sizeof(ctr_vertex_t));
   GPU_Finalize();
   ctrGuFlushAndRun(true);

   ctr->p3d_event_pending = true;
   ctr->ppf_event_pending = false;

   if (input && input_data)
   {
      ctrinput             = input_driver_init_wrap(&input_ctr, settings->arrays.input_joypad_driver);
      *input               = ctrinput ? &input_ctr : NULL;
      *input_data          = ctrinput;
   }

   ctr->keep_aspect   = true;
   ctr->should_resize = true;
   ctr->smooth        = video->smooth;
   ctr->vsync         = video->vsync;
   ctr->current_buffer_top = 0;
   ctr->current_buffer_bottom = 0;

   /* Only O3DS and O3DSXL support running in 'dual-framebuffer'
    * mode with the parallax barrier disabled
    * (i.e. these are the only platforms that can use
    * CTR_VIDEO_MODE_2D_400X240 and CTR_VIDEO_MODE_2D_800X240) */
   CFGU_GetSystemModel(&device_model); /* (0 = O3DS, 1 = O3DSXL, 2 = N3DS, 3 = 2DS, 4 = N3DSXL, 5 = N2DSXL) */
   ctr->supports_parallax_disable = (device_model == 0) || (device_model == 1);

   refresh_rate = (32730.0 * 8192.0) / 4481134.0;

   driver_ctl(RARCH_DRIVER_CTL_SET_REFRESH_RATE, &refresh_rate);
   aptHook(&ctr->lcd_aptHook, ctr_lcd_aptHook, ctr);

   font_driver_init_osd(ctr, video,
         false,
         video->is_threaded,
         FONT_DRIVER_RENDER_CTR);

   ctr->msg_rendering_enabled     = false;
   ctr->menu_texture_frame_enable = false;
   ctr->menu_texture_enable       = false;

   /* Set bottom screen enable state, if required */
   if (lcd_bottom != ctr_bottom_screen_enabled)
      ctr_set_bottom_screen_enable(lcd_bottom, false);

   gspSetEventCallback(GSPGPU_EVENT_VBlank0,
         (ThreadFunc)ctr_vsync_hook, ctr, false);

   return ctr;
}

#if 0
#define CTR_INSPECT_MEMORY_USAGE
#endif

static bool ctr_frame(void* data, const void* frame,
      unsigned width, unsigned height,
      uint64_t frame_count,
      unsigned pitch, const char* msg, video_frame_info_t *video_info)
{
   static uint64_t currentTick,lastTick;
   extern GSPGPU_FramebufferInfo topFramebufferInfo, bottomFramebufferInfo;
   extern u8* gfxSharedMemory;
   extern u8 gfxThreadID;
   uint32_t diff;
   ctr_video_t       *ctr         = (ctr_video_t*)data;
   static float        fps        = 0.0;
   static int total_frames        = 0;
   static int       frames        = 0;
   settings_t    *settings        = config_get_ptr();
   unsigned disp_mode             = settings->uints.video_3ds_display_mode;
   bool statistics_show           = video_info->statistics_show;
   const char *stat_text          = video_info->stat_text;
   float video_refresh_rate       = video_info->refresh_rate;
   struct font_params *osd_params = (struct font_params*)
      &video_info->osd_stat_params;
   int custom_vp_x                = video_info->custom_vp_x;
   int custom_vp_y                = video_info->custom_vp_y;
   unsigned custom_vp_width       = video_info->custom_vp_width;
   unsigned custom_vp_height      = video_info->custom_vp_height;
#ifdef HAVE_MENU
   bool menu_is_alive             = video_info->menu_is_alive;
#endif
#ifdef HAVE_GFX_WIDGETS
   bool widgets_active            = video_info->widgets_active;
#endif
   bool lcd_bottom                = false;

   if (!width || !height || !settings)
   {
      gspWaitForEvent(GSPGPU_EVENT_VBlank0, true);
      return true;
   }

   lcd_bottom = settings->bools.video_3ds_lcd_bottom;
   if (lcd_bottom != ctr_bottom_screen_enabled)
   {
      if (retroarch_ctl(RARCH_CTL_CORE_IS_RUNNING, NULL))
      {
         ctr_set_bottom_screen_enable(lcd_bottom, false);
         if (lcd_bottom)
            ctr->refresh_bottom_menu = true;
      }
      else
         ctr_bottom_screen_enabled = lcd_bottom;
   }
   bottom_menu_control(data, lcd_bottom);

   if (ctr->p3d_event_pending)
   {
      gspWaitForEvent(GSPGPU_EVENT_P3D, false);
      ctr->p3d_event_pending = false;
   }
   if (ctr->ppf_event_pending)
   {
      gspWaitForEvent(GSPGPU_EVENT_PPF, false);
      ctr->ppf_event_pending = false;
   }
#ifndef HAVE_THREADS
   if (task_queue_find(&ctr_tasks_finder_data))
   {
#if 0
      ctr->vsync_event_pending = true;
#endif
      while (ctr->vsync_event_pending)
      {
         task_queue_check();
         svcSleepThread(0);
      }
   }
#endif
   if (ctr->vsync)
   {
      /* If we are running at the display refresh rate,
       * then all is well - just wait on the *current* VBlank0
       * event and carry on.
       * 
       * If we are running at below the display refresh rate,
       * then we have problems: frame updates will happen
       * entirely out of sync with VBlank0 events. To elaborate,
       * we'll wait for a VBlank0 here, but it will already have
       * happened partway through the previous frame. So it's:
       * 'oh good - let's render the current frame', but the next
       * VBlank0 will occur in less time than it takes to draw the
       * current frame, resulting in 'overlap' and screen tearing.
       * 
       * This seems to be a consequence of using the GPU directly.
       * Other 3DS homebrew typically uses the ctrulib function
       * gfxSwapBuffers(), which ensures an immediate buffer
       * swap every time, and no tearing. We can't do this:
       * instead, we use a variant of the ctrulib function
       * gfxSwapBuffersGpu(), which seems to send a notification,
       * and the swap happens when it happens...
       * 
       * I don't know how to fix this 'properly' (probably needs
       * some low level rewriting, maybe switching to an implementation
       * based on citro3d), but I can at least implement a hack/workaround
       * that allows 50Hz content to be run without tearing. This involves
       * the following:
       * 
       * If content frame rate is more than 10% lower than the 3DS
       * display refresh rate, don't wait on the *current* VBlank0
       * event (because it is 'tainted'), but instead wait on the
       * *next* VBlank0 event (which will ensure we have enough time
       * to write/flush the display buffers).
       * 
       * This fixes screen tearing, but it has a significant impact on
       * performance...
       * */
      bool next_event = false;
      struct retro_system_av_info *av_info = video_viewport_get_system_av_info();
      if (av_info)
         next_event = av_info->timing.fps < video_refresh_rate * 0.9f;
      gspWaitForEvent(GSPGPU_EVENT_VBlank0, next_event);
   }

   ctr->vsync_event_pending = true;

   /* Internal counters/statistics
    * > This is only required if the bottom screen is enabled */
   if (ctr_bottom_screen_enabled)
   {
      frames++;
      currentTick = svcGetSystemTick();
      diff        = currentTick - lastTick;
      if(diff > CTR_CPU_TICKS_PER_SECOND)
      {
         fps = (float)frames * ((float) CTR_CPU_TICKS_PER_SECOND / (float) diff);
         lastTick = currentTick;
         frames = 0;
      }

#ifdef CTR_INSPECT_MEMORY_USAGE
      uint32_t ctr_get_stack_usage(void);
      void ctr_linear_get_stats(void);
      extern u32 __linear_heap_size;
      extern u32 __heap_size;

      MemInfo mem_info;
      PageInfo page_info;
      u32 query_addr = 0x08000000;
      printf(PRINTFPOS(0,0));
      while (query_addr < 0x40000000)
      {
         svcQueryMemory(&mem_info, &page_info, query_addr);
         printf("0x%08X --> 0x%08X (0x%08X) \n", mem_info.base_addr, mem_info.base_addr + mem_info.size, mem_info.size);
         query_addr = mem_info.base_addr + mem_info.size;
         if(query_addr == 0x1F000000)
            query_addr = 0x30000000;
      }

#if 0
      static u32* dummy_pointer;
      if(total_frames == 500)
         dummy_pointer = malloc(0x2000000);
      if(total_frames == 1000)
         free(dummy_pointer);
#endif

      printf("========================================");
      printf("0x%08X 0x%08X 0x%08X\n", __heap_size, gpuCmdBufOffset, (__linear_heap_size - linearSpaceFree()));
      printf("fps: %8.4f frames: %i (%X)\n", fps, total_frames++, (__linear_heap_size - linearSpaceFree()));
      printf("========================================");
      u32 app_memory = *((u32*)0x1FF80040);
      u64 mem_used;
      svcGetSystemInfo(&mem_used, 0, 1);
      printf("total mem : 0x%08X          \n", app_memory);
      printf("used: 0x%08X free: 0x%08X      \n", (u32)mem_used, app_memory - (u32)mem_used);
      static u32 stack_usage = 0;
      extern u32 __stack_bottom;
      if(!(total_frames & 0x3F))
         stack_usage = ctr_get_stack_usage();
      printf("stack total:0x%08X used: 0x%08X\n", 0x10000000 - __stack_bottom, stack_usage);

      printf("========================================");
      ctr_linear_get_stats();
      printf("========================================");

#else
      printf(PRINTFPOS(29,0)"fps: %8.4f frames: %i\r", fps, total_frames++);
#endif
      fflush(stdout);
   }

   if (ctr->should_resize)
      ctr_update_viewport(ctr, settings,
            custom_vp_x,
            custom_vp_y,
            custom_vp_width,
            custom_vp_height
            );

   if (ctr->refresh_bottom_menu)
   {
      ctrGuSetMemoryFill(true, (u32*)ctr->drawbuffers.top.left, 0x00000000,
            (u32*)ctr->drawbuffers.top.left + 2 * CTR_TOP_FRAMEBUFFER_WIDTH * CTR_TOP_FRAMEBUFFER_HEIGHT,
            0x201,
            (u32*)ctr->drawbuffers.bottom, 0x00000000,
            (u32*)ctr->drawbuffers.bottom + 2 * CTR_BOTTOM_FRAMEBUFFER_WIDTH * CTR_BOTTOM_FRAMEBUFFER_HEIGHT,
            0x201);
   }
   else
   {
      ctrGuSetMemoryFill(true, (u32*)ctr->drawbuffers.top.left, 0x00000000,
            (u32*)ctr->drawbuffers.top.left + 2 * CTR_TOP_FRAMEBUFFER_WIDTH * CTR_TOP_FRAMEBUFFER_HEIGHT,
            0x201, NULL, 0x00000000,
            0,
            0x201);
   }

   GPUCMD_SetBufferOffset(0);

   if (width > ctr->texture_width)
      width = ctr->texture_width;
   if (height > ctr->texture_height)
      height = ctr->texture_height;

   if(frame)
   {
      if(((((u32)(frame)) >= 0x14000000 && ((u32)(frame)) < 0x40000000)) /* frame in linear memory */
         && !((u32)frame & 0x7F)                                         /* 128-byte aligned */
         && !(pitch & 0xF)                                               /* 16-byte aligned */
         && (pitch > 0x40))
      {
         /* can copy the buffer directly with the GPU */
#if 0
         GSPGPU_FlushDataCache(frame, pitch * height);
#endif
         ctrGuSetCommandList_First(true,(void*)frame, pitch * height,0,0,0,0);
         ctrGuCopyImage(true, frame, pitch / (ctr->rgb32? 4: 2), height, ctr->rgb32 ? CTRGU_RGBA8: CTRGU_RGB565, false,
               ctr->texture_swizzled, ctr->texture_width, ctr->rgb32 ? CTRGU_RGBA8: CTRGU_RGB565,  true);
      }
      else
      {
         int i;
         uint8_t       *dst = (uint8_t*)ctr->texture_linear;
         const uint8_t *src = frame;

         for (i = 0; i < height; i++)
         {
            memcpy(dst, src, width * (ctr->rgb32? 4: 2));
            dst += ctr->texture_width * (ctr->rgb32? 4: 2);
            src += pitch;
         }
         GSPGPU_FlushDataCache(ctr->texture_linear,
                               ctr->texture_width * ctr->texture_height * (ctr->rgb32? 4: 2));

         ctrGuCopyImage(false, ctr->texture_linear, ctr->texture_width, ctr->texture_height, ctr->rgb32 ? CTRGU_RGBA8: CTRGU_RGB565, false,
                        ctr->texture_swizzled, ctr->texture_width, ctr->rgb32 ? CTRGU_RGBA8: CTRGU_RGB565,  true);

      }

      ctr->frame_coords->u0 = 0;
      ctr->frame_coords->v0 = 0;
      ctr->frame_coords->u1 = width;
      ctr->frame_coords->v1 = height;
      GSPGPU_FlushDataCache(ctr->frame_coords, sizeof(ctr_vertex_t));
   }

   GPUCMD_AddWrite(GPUREG_GSH_BOOLUNIFORM, ctr->rotation & 1);
   ctrGuSetVertexShaderFloatUniform(0, (float*)&ctr->scale_vector, 1);
   ctrGuSetTexture(GPU_TEXUNIT0, VIRT_TO_PHYS(ctr->texture_swizzled), ctr->texture_width, ctr->texture_height,
                  (ctr->smooth? GPU_TEXTURE_MAG_FILTER(GPU_LINEAR)  | GPU_TEXTURE_MIN_FILTER(GPU_LINEAR)
                              : GPU_TEXTURE_MAG_FILTER(GPU_NEAREST) | GPU_TEXTURE_MIN_FILTER(GPU_NEAREST)) |
                  GPU_TEXTURE_WRAP_S(GPU_CLAMP_TO_EDGE) | GPU_TEXTURE_WRAP_T(GPU_CLAMP_TO_EDGE),
                  ctr->rgb32 ? GPU_RGBA8: GPU_RGB565);

   ctr_check_3D_slider(ctr, (ctr_video_mode_enum)disp_mode);

   /* ARGB --> RGBA  */
   if (ctr->rgb32)
   {
      GPU_SetTexEnv(0,
                    GPU_TEVSOURCES(GPU_TEXTURE0, GPU_CONSTANT, 0),
                    GPU_CONSTANT,
                    GPU_TEVOPERANDS(GPU_TEVOP_RGB_SRC_G, 0, 0),
                    0,
                    GPU_MODULATE, GPU_REPLACE,
                    0xFF0000FF);
      GPU_SetTexEnv(1,
                    GPU_TEVSOURCES(GPU_TEXTURE0, GPU_CONSTANT, GPU_PREVIOUS),
                    GPU_PREVIOUS,
                    GPU_TEVOPERANDS(GPU_TEVOP_RGB_SRC_B, 0, 0),
                    0,
                    GPU_MULTIPLY_ADD, GPU_REPLACE,
                    0x00FF00);
      GPU_SetTexEnv(2,
                    GPU_TEVSOURCES(GPU_TEXTURE0, GPU_CONSTANT, GPU_PREVIOUS),
                    GPU_PREVIOUS,
                    GPU_TEVOPERANDS(GPU_TEVOP_RGB_SRC_ALPHA, 0, 0),
                    0,
                    GPU_MULTIPLY_ADD, GPU_REPLACE,
                    0xFF0000);
   }

   GPU_SetViewport(NULL,
                   VIRT_TO_PHYS(ctr->drawbuffers.top.left),
                   0, 0, CTR_TOP_FRAMEBUFFER_HEIGHT,
                   ctr->video_mode == CTR_VIDEO_MODE_2D_800X240 ? CTR_TOP_FRAMEBUFFER_WIDTH * 2 : CTR_TOP_FRAMEBUFFER_WIDTH);

   if (ctr->video_mode == CTR_VIDEO_MODE_3D)
   {
      if (ctr->menu_texture_enable)
      {
         ctrGuSetAttributeBuffersAddress(VIRT_TO_PHYS(&ctr->frame_coords[1]));
         GPU_DrawArray(GPU_GEOMETRY_PRIM, 0, 1);
         ctrGuSetAttributeBuffersAddress(VIRT_TO_PHYS(&ctr->frame_coords[2]));
      }
      else
      {
         ctrGuSetAttributeBuffersAddress(VIRT_TO_PHYS(ctr->frame_coords));
         GPU_DrawArray(GPU_GEOMETRY_PRIM, 0, 1);
      }
      GPU_SetViewport(NULL,
                      VIRT_TO_PHYS(ctr->drawbuffers.top.right),
                      0, 0, CTR_TOP_FRAMEBUFFER_HEIGHT,
                      CTR_TOP_FRAMEBUFFER_WIDTH);
   }
   else
      ctrGuSetAttributeBuffersAddress(VIRT_TO_PHYS(ctr->frame_coords));

   GPU_DrawArray(GPU_GEOMETRY_PRIM, 0, 1);

   /* restore */
   if (ctr->rgb32)
   {
      GPU_SetTexEnv(0, GPU_TEXTURE0, GPU_TEXTURE0, 0, 0, GPU_REPLACE, GPU_REPLACE, 0);
      GPU_SetTexEnv(1, GPU_PREVIOUS, GPU_PREVIOUS, 0, 0, 0, 0, 0);
      GPU_SetTexEnv(2, GPU_PREVIOUS, GPU_PREVIOUS, 0, 0, 0, 0, 0);
   }

#ifdef HAVE_MENU
   if (ctr->menu_texture_enable)
   {
      if(ctr->menu_texture_frame_enable)
      {
         ctrGuSetTexture(GPU_TEXUNIT0, VIRT_TO_PHYS(ctr->menu.texture_swizzled), ctr->menu.texture_width, ctr->menu.texture_height,
                        GPU_TEXTURE_MAG_FILTER(GPU_LINEAR) | GPU_TEXTURE_MIN_FILTER(GPU_LINEAR) |
                        GPU_TEXTURE_WRAP_S(GPU_CLAMP_TO_EDGE) | GPU_TEXTURE_WRAP_T(GPU_CLAMP_TO_EDGE),
                        GPU_RGBA4);

         GPUCMD_AddWrite(GPUREG_GSH_BOOLUNIFORM, 0);
         ctrGuSetVertexShaderFloatUniform(0, (float*)&ctr->menu.scale_vector, 1);
         ctrGuSetAttributeBuffersAddress(VIRT_TO_PHYS(ctr->menu.frame_coords));

         GPU_SetViewport(NULL,
                         VIRT_TO_PHYS(ctr->drawbuffers.top.left),
                         0, 0, CTR_TOP_FRAMEBUFFER_HEIGHT,
                         ctr->video_mode == CTR_VIDEO_MODE_2D_800X240 ? CTR_TOP_FRAMEBUFFER_WIDTH * 2 : CTR_TOP_FRAMEBUFFER_WIDTH);
         GPU_DrawArray(GPU_GEOMETRY_PRIM, 0, 1);

         if (ctr->video_mode == CTR_VIDEO_MODE_3D)
         {
            GPU_SetViewport(NULL,
                            VIRT_TO_PHYS(ctr->drawbuffers.top.right),
                            0, 0, CTR_TOP_FRAMEBUFFER_HEIGHT,
                            CTR_TOP_FRAMEBUFFER_WIDTH);
            GPU_DrawArray(GPU_GEOMETRY_PRIM, 0, 1);
         }
      }

      ctr->msg_rendering_enabled = true;
#ifdef HAVE_MENU
      menu_driver_frame(menu_is_alive, video_info);
#endif
      ctr->msg_rendering_enabled = false;
   }
   else if (statistics_show)
   {
      if (osd_params)
      {
         font_driver_render_msg(ctr, stat_text,
               (const struct font_params*)osd_params, NULL);
      }
   }
#endif

#ifdef HAVE_OVERLAY
   if (ctr->overlay_enabled)
      ctr_render_overlay(ctr);
#endif

#ifdef HAVE_GFX_WIDGETS
   if (widgets_active)
      gfx_widgets_frame(video_info);
#endif

#ifndef CONSOLE_LOG
   if (ctr_bottom_screen_enabled && 
         retroarch_ctl(RARCH_CTL_CORE_IS_RUNNING, NULL))
   {
      if ( !ctr->bottom_is_idle )
      {
         ctr_render_bottom_screen(ctr);

         if ( ctr->bottom_check_idle )
            ctr_set_bottom_screen_idle(ctr);
      }
   }
#endif

   if (msg)
      font_driver_render_msg(ctr, msg, NULL, NULL);

   GPU_FinishDrawing();
   GPU_Finalize();
   ctrGuFlushAndRun(true);

   ctrGuDisplayTransfer(true, ctr->drawbuffers.top.left,
                        240,
                        ctr->video_mode == CTR_VIDEO_MODE_2D_800X240 ? 800 : 400,
                        CTRGU_RGBA8,
                        gfxTopLeftFramebuffers[ctr->current_buffer_top], 240, CTRGU_RGB8, CTRGU_MULTISAMPLE_NONE);

   if ((ctr->video_mode == CTR_VIDEO_MODE_2D_400X240) || (ctr->video_mode == CTR_VIDEO_MODE_3D))
      ctrGuDisplayTransfer(true, ctr->drawbuffers.top.right,
                           240,
                           400,
                           CTRGU_RGBA8,
                           gfxTopRightFramebuffers[ctr->current_buffer_top], 240, CTRGU_RGB8, CTRGU_MULTISAMPLE_NONE);

#ifndef CONSOLE_LOG
   if (ctr->refresh_bottom_menu)
      ctrGuDisplayTransfer(true,
                           ctr->drawbuffers.bottom,
                           240,
                           320,
                           CTRGU_RGBA8,
                           gfxBottomFramebuffers[ctr->current_buffer_bottom], 240, CTRGU_RGB8, CTRGU_MULTISAMPLE_NONE);
#endif
   /* Swap buffers : */

#ifdef USE_CTRULIB_2
   u32 *buf0, *buf1, *bottom;
   u32 stride;

   buf0 = (u32*)gfxTopLeftFramebuffers[ctr->current_buffer_top];

   if(ctr->video_mode == CTR_VIDEO_MODE_2D_800X240)
   {
      buf1 = (u32*)(gfxTopLeftFramebuffers[ctr->current_buffer_top] + 240 * 3);
      stride = 240 * 3 * 2;
   }
   else
   {
      if (ctr->enable_3d)
         buf1 = (u32*)gfxTopRightFramebuffers[ctr->current_buffer_top];
      else
         buf1 = buf0;

      stride = 240 * 3;
   }

   u8 bit5 = (ctr->enable_3d != 0);

   gspPresentBuffer(GFX_TOP, ctr->current_buffer_top, buf0, buf1,
                    stride, (1<<8)|((1^bit5)<<6)|((bit5)<<5)|GSP_BGR8_OES);

#ifndef CONSOLE_LOG
   if (ctr->refresh_bottom_menu)
   {
      bottom = (u32*)gfxBottomFramebuffers[ctr->current_buffer_bottom];
      stride = 240 * 3;
      gspPresentBuffer(GFX_BOTTOM, ctr->current_buffer_bottom, bottom, bottom,
            stride, GSP_BGR8_OES);
   }
   else if (ctr->bottom_is_fading)
   {
      gfxScreenSwapBuffers(GFX_BOTTOM,false);
   }
#endif 
#else
   topFramebufferInfo.
      active_framebuf           = ctr->current_buffer_top;
   topFramebufferInfo.
      framebuf0_vaddr           = (u32*)gfxTopLeftFramebuffers[ctr->current_buffer_top];

   if(ctr->video_mode == CTR_VIDEO_MODE_2D_800X240)
   {
      topFramebufferInfo.
         framebuf1_vaddr        = (u32*)(gfxTopLeftFramebuffers[ctr->current_buffer_top] + 240 * 3);
      topFramebufferInfo.
         framebuf_widthbytesize = 240 * 3 * 2;
   }
   else
   {
      if (ctr->enable_3d)
         topFramebufferInfo.
            framebuf1_vaddr     = (u32*)gfxTopRightFramebuffers[ctr->current_buffer_top];
      else
         topFramebufferInfo.
            framebuf1_vaddr     = topFramebufferInfo.framebuf0_vaddr;

      topFramebufferInfo.
         framebuf_widthbytesize = 240 * 3;
   }

   u8 bit5                      = (ctr->enable_3d != 0);
   topFramebufferInfo.format    = (1<<8)|((1^bit5)<<6)|((bit5)<<5)|GSP_BGR8_OES;
   topFramebufferInfo.
      framebuf_dispselect       = ctr->current_buffer_top;
   topFramebufferInfo.unk       = 0x00000000;

   u8* framebufferInfoHeader    = gfxSharedMemory+0x200+gfxThreadID*0x80;
	GSPGPU_FramebufferInfo*
      framebufferInfo           = (GSPGPU_FramebufferInfo*)&framebufferInfoHeader[0x4];
	framebufferInfoHeader[0x0]  ^= 1;
	framebufferInfo[framebufferInfoHeader[0x0]] = topFramebufferInfo;
	framebufferInfoHeader[0x1]   = 1;

#ifndef CONSOLE_LOG
   if (ctr->refresh_bottom_menu)
   {
      bottomFramebufferInfo.
         active_framebuf           = ctr->current_buffer_bottom;
      bottomFramebufferInfo.
         framebuf0_vaddr           = (u32*)gfxBottomFramebuffers[
         ctr->current_buffer_bottom];

      bottomFramebufferInfo.
         framebuf1_vaddr           = (u32*)(gfxBottomFramebuffers[
               ctr->current_buffer_bottom] + 240 * 3);
      bottomFramebufferInfo.
         framebuf_widthbytesize    = 240 * 3;

      bottomFramebufferInfo.format = GSP_BGR8_OES;
      bottomFramebufferInfo.
         framebuf_dispselect       = ctr->current_buffer_bottom;
      bottomFramebufferInfo.unk    = 0x00000000;

      u8* framebufferInfoHeader2   = gfxSharedMemory+0x200+gfxThreadID*0x80+0x40;
      GSPGPU_FramebufferInfo*
         framebufferInfo2          =
         (GSPGPU_FramebufferInfo*)&framebufferInfoHeader2[0x4];
      framebufferInfoHeader2[0x0] ^= 1;
      framebufferInfo2[framebufferInfoHeader2[0x0]] = bottomFramebufferInfo;
      framebufferInfoHeader2[0x1]  = 1;
   }
#endif
#endif
   ctr->current_buffer_top     ^= 1;
   if (ctr->refresh_bottom_menu || ctr->bottom_is_fading)
      ctr->current_buffer_bottom  ^= 1;

   ctr->p3d_event_pending       = true;
   ctr->ppf_event_pending       = true;
   ctr->refresh_bottom_menu     = false;

   return true;
}

static void ctr_set_nonblock_state(void* data, bool toggle,
      bool a, unsigned b)
{
   ctr_video_t* ctr = (ctr_video_t*)data;

   if (ctr)
      ctr->vsync = !toggle;
}

static bool ctr_alive(void* data)
{
   (void)data;
   return true;
}

static bool ctr_focus(void* data)
{
   (void)data;
   return true;
}

static bool ctr_suppress_screensaver(void* data, bool enable)
{
   (void)data;
   (void)enable;
   return false;
}

static void ctr_free(void* data)
{
   unsigned i;
   ctr_video_t* ctr = (ctr_video_t*)data;

   if (!ctr)
      return;

   aptUnhook(&ctr->lcd_aptHook);
   gspSetEventCallback(GSPGPU_EVENT_VBlank0, NULL, NULL, true);
   shaderProgramFree(&ctr->shader);
   DVLB_Free(ctr->dvlb);
   vramFree(ctr->drawbuffers.top.left);
   vramFree(ctr->drawbuffers.bottom);
   for (i = 0; i < CTR_TEXTURE_LAST; i++)
   {
      struct ctr_bottom_texture_data *o = &ctr->bottom_textures[i];
      ctr_texture_t *texture = (ctr_texture_t *) o->texture;
      if (texture)
      {
         linearFree(texture->data);
         linearFree(o->frame_coords);
         o->texture = 0;
      }
   }
   free(ctr->bottom_textures);
   linearFree(ctr->display_list);
   linearFree(ctr->texture_linear);
   linearFree(ctr->texture_swizzled);
   linearFree(ctr->frame_coords);
   linearFree(ctr->menu.texture_linear);
   linearFree(ctr->menu.texture_swizzled);
   linearFree(ctr->menu.frame_coords);
   linearFree(ctr->vertex_cache.buffer);
   linearFree(ctr);
#if 0
   gfxExit();
#endif
}
static void ctr_set_texture_frame(void* data, const void* frame, bool rgb32,
                                  unsigned width, unsigned height, float alpha)
{
   int i;
   ctr_video_t* ctr = (ctr_video_t*)data;
   int line_width = width;
   (void)rgb32;
   (void)alpha;

   if(!ctr || !frame)
      return;

   if (line_width > ctr->menu.texture_width)
      line_width = ctr->menu.texture_width;

   if (height > (unsigned)ctr->menu.texture_height)
      height = (unsigned)ctr->menu.texture_height;

   const uint16_t* src = frame;
   uint16_t* dst = (uint16_t*)ctr->menu.texture_linear;
   for (i = 0; i < height; i++)
   {
      memcpy(dst, src, line_width * sizeof(uint16_t));
      dst += ctr->menu.texture_width;
      src += width;
   }

   ctr->menu.frame_coords->x0 = (CTR_TOP_FRAMEBUFFER_WIDTH - width) / 2;
   ctr->menu.frame_coords->y0 = (CTR_TOP_FRAMEBUFFER_HEIGHT - height) / 2;
   ctr->menu.frame_coords->x1 = ctr->menu.frame_coords->x0 + width;
   ctr->menu.frame_coords->y1 = ctr->menu.frame_coords->y0 + height;
   ctr->menu.frame_coords->u0 = 0;
   ctr->menu.frame_coords->v0 = 0;
   ctr->menu.frame_coords->u1 = width;
   ctr->menu.frame_coords->v1 = height;
   GSPGPU_FlushDataCache(ctr->menu.frame_coords, sizeof(ctr_vertex_t));
   ctr->menu_texture_frame_enable = true;
   GSPGPU_FlushDataCache(ctr->menu.texture_linear,
                         ctr->menu.texture_width * ctr->menu.texture_height * sizeof(uint16_t));

   ctrGuCopyImage(false, ctr->menu.texture_linear, ctr->menu.texture_width, ctr->menu.texture_height, CTRGU_RGBA4444,false,
                  ctr->menu.texture_swizzled, ctr->menu.texture_width, CTRGU_RGBA4444,  true);
}

static void ctr_set_texture_enable(void* data, bool state, bool full_screen)
{
   (void) full_screen;

   ctr_video_t* ctr = (ctr_video_t*)data;

   if (ctr)
      ctr->menu_texture_enable = state;
}

static void ctr_set_rotation(void* data, unsigned rotation)
{
   ctr_video_t* ctr = (ctr_video_t*)data;

   if (!ctr)
      return;

   ctr->rotation = rotation;
   ctr->should_resize = true;
}
static void ctr_set_filtering(void* data, unsigned index, bool smooth, bool ctx_scaling)
{
   ctr_video_t* ctr = (ctr_video_t*)data;

   if (ctr)
      ctr->smooth = smooth;
}

static void ctr_set_aspect_ratio(void* data, unsigned aspect_ratio_idx)
{
   ctr_video_t *ctr = (ctr_video_t*)data;

   if(!ctr)
      return;

   ctr->keep_aspect   = true;
   ctr->should_resize = true;
}

static void ctr_apply_state_changes(void* data)
{
   ctr_video_t* ctr = (ctr_video_t*)data;

   if (ctr)
      ctr->should_resize = true;

}

static void ctr_viewport_info(void* data, struct video_viewport* vp)
{
   ctr_video_t* ctr = (ctr_video_t*)data;

   if (ctr)
      *vp = ctr->vp;
}

static uintptr_t ctr_load_texture(void *video_data, void *data,
      bool threaded, enum texture_filter_type filter_type)
{
   void* tmpdata;
   ctr_texture_t *texture      = NULL;
   ctr_video_t            *ctr = (ctr_video_t*)video_data;
   struct texture_image *image = (struct texture_image*)data;
   int size                    = image->width 
      * image->height * sizeof(uint32_t);

   if ((size * 3) > linearSpaceFree())
      return 0;

   if (!ctr || !image || image->width > 2048 || image->height > 2048)
      return 0;

   texture                     = (ctr_texture_t*)
      calloc(1, sizeof(ctr_texture_t));

   texture->width              = next_pow2(image->width);
   texture->height             = next_pow2(image->height);
   texture->active_width       = image->width;
   texture->active_height      = image->height;
   texture->data               = linearAlloc(
         texture->width * texture->height * sizeof(uint32_t));
   texture->type               = filter_type;

   if (!texture->data)
   {
      free(texture);
      return 0;
   }

   if ((image->width <= 32) || (image->height <= 32))
   {
      int i, j;
      uint32_t* src = (uint32_t*)image->pixels;

      for (j = 0; j < image->height; j++)
         for (i = 0; i < image->width; i++)
         {
            ((uint32_t*)texture->data)[ctrgu_swizzle_coords(i, j,
               texture->width)] =
                    ((*src << 8)  & 0xFF000000) 
                  | ((*src << 8)  & 0x00FF0000)
                  | ((*src << 8)  & 0x0000FF00)
                  | ((*src >> 24) & 0x000000FF);
            src++;
         }
      GSPGPU_FlushDataCache(texture->data, texture->width 
            * texture->height * sizeof(uint32_t));
   }
   else
   {
      int i;
      uint32_t *src = NULL;
      uint32_t *dst = NULL;

      tmpdata = linearAlloc(image->width 
            * image->height * sizeof(uint32_t));
      if (!tmpdata)
      {
         free(texture->data);
         free(texture);
         return 0;
      }

      src = (uint32_t*)image->pixels;
      dst = (uint32_t*)tmpdata;

      for (i = 0; i < image->width * image->height; i++)
      {
         *dst = 
              ((*src << 8)  & 0xFF000000) 
            | ((*src << 8)  & 0x00FF0000)
            | ((*src << 8)  & 0x0000FF00)
            | ((*src >> 24) & 0x000000FF);
         dst++;
         src++;
      }

      GSPGPU_FlushDataCache(tmpdata,
            image->width * image->height * sizeof(uint32_t));
      ctrGuCopyImage(true, tmpdata,
            image->width, image->height, CTRGU_RGBA8, false,
            texture->data, texture->width, CTRGU_RGBA8,  true);
#if 0
      gspWaitForEvent(GSPGPU_EVENT_PPF, false);
      ctr->ppf_event_pending = false;
#else
      ctr->ppf_event_pending = true;
#endif
      linearFree(tmpdata);
   }

   return (uintptr_t)texture;
}

static void ctr_unload_texture(void *data, bool threaded,
      uintptr_t handle)
{
   struct ctr_texture *texture   = (struct ctr_texture*)handle;

   if (!texture)
      return;

   if (texture->data)
   {
      if (((u32)texture->data & 0xFF000000) == 0x1F000000)
         vramFree(texture->data);
      else
         linearFree(texture->data);
   }
   free(texture);
}

#ifdef HAVE_OVERLAY
static void ctr_overlay_tex_geom(void *data,
            unsigned image, float x, float y, float w, float h)
{
   ctr_video_t           *ctr = (ctr_video_t *)data;
   struct ctr_overlay_data *o = NULL;

   if (ctr)
      o = (struct ctr_overlay_data *)&ctr->overlay[image];

   if (!o)
      return;

//   printf("tex_geom[%i]: %i, %i, %.6f, %.6f\n%.6f, %.6f, ", image, o->texture.width, o->texture.height,x,y,w,h);

   o->frame_coords->u0 = x*o->texture.width;
   o->frame_coords->v0 = y*o->texture.height;
   o->frame_coords->u1 = w*o->texture.width;
   o->frame_coords->v1 = h*o->texture.height;

//   printf("tex_geom[%i]: %i, %i, %i, %i\n", image, o->frame_coords->u0,o->frame_coords->v0,o->frame_coords->u1,o->frame_coords->v1);

   GSPGPU_FlushDataCache(o->frame_coords, sizeof(ctr_vertex_t));

}

static void ctr_overlay_vertex_geom(void *data,
            unsigned image, float x, float y, float w, float h)
{
   ctr_video_t           *ctr = (ctr_video_t *)data;
   struct ctr_overlay_data *o = NULL;

   if (ctr)
      o = (struct ctr_overlay_data *)&ctr->overlay[image];

   if (!o)
      return;

//   printf("vertex_geom[%i]: %.6f, %.6f, %.6f, %.6f, ", image, x,y,w,h);

   o->frame_coords->x0 = x * CTR_TOP_FRAMEBUFFER_WIDTH;
   o->frame_coords->y0 = y * CTR_TOP_FRAMEBUFFER_HEIGHT;
   o->frame_coords->x1 = w * (o->frame_coords->x0 + o->texture.width);
   o->frame_coords->y1 = h * (o->frame_coords->y0 + o->texture.height);

//   printf("vertex_geom[%i]: %i, %i, %i, %i\n", image, o->frame_coords->x0,o->frame_coords->y0,o->frame_coords->x1,o->frame_coords->y1);

   GSPGPU_FlushDataCache(o->frame_coords, sizeof(ctr_vertex_t));
}

static bool ctr_overlay_load(void *data,
            const void *image_data, unsigned num_images)
{
   void* tmpdata;
   unsigned i, j;
   ctr_texture_t       *texture = NULL;
   ctr_video_t             *ctr = (ctr_video_t *)data;
   struct texture_image *images = (struct texture_image *)image_data;

   ctr_free_overlay(ctr);

   ctr->overlay = (struct ctr_overlay_data *)calloc(num_images, sizeof(*ctr->overlay));

   if (!ctr)
      return false;

   ctr->overlays = num_images;

   for (i = 0; i < num_images; i++)
   {
      struct ctr_overlay_data *o = (struct ctr_overlay_data *)&ctr->overlay[i];

      o->frame_coords = linearAlloc(sizeof(ctr_vertex_t));

      if (!ctr || !images || images[i].width > 1024 || images[i].height > 1024)
         return 0;

      memset(&o->texture, 0, sizeof(ctr_texture_t));

      o->texture.width              = next_pow2(images[i].width);
      o->texture.height             = next_pow2(images[i].height);
      o->texture.data               = linearAlloc(
            o->texture.width * o->texture.height * sizeof(uint32_t));

      if (!o->texture.data)
      {
         free(o);
         return 0;
      }

      uint32_t *src = NULL;
      uint32_t *dst = NULL;

      tmpdata = linearAlloc(images[i].width
            * images[i].height * sizeof(uint32_t));
      if (!tmpdata)
      {
         linearFree(o->texture.data);
         free(o);
         return 0;
      }

      src = (uint32_t*)images[i].pixels;
      dst = (uint32_t*)tmpdata;

      for (j = 0; j < images[i].width * images[i].height; j++)
      {
         *dst = 
              ((*src << 8)  & 0xFF000000) 
            | ((*src << 8)  & 0x00FF0000)
            | ((*src << 8)  & 0x0000FF00)
            | ((*src >> 24) & 0x000000FF);
         dst++;
         src++;
      }

      GSPGPU_FlushDataCache(tmpdata,
            images[i].width * images[i].height * sizeof(uint32_t));
      ctrGuCopyImage(true, tmpdata,
            images[i].width, images[i].height, CTRGU_RGBA8, false,
            o->texture.data, o->texture.width, CTRGU_RGBA8,  true);

      ctr->ppf_event_pending = true;

      linearFree(tmpdata);

      ctr_overlay_tex_geom(ctr, i, 0, 0, 1, 1);
      ctr_overlay_vertex_geom(ctr, i, 0, 0, 1, 1);

      ctr_set_scale_vector(&o->scale_vector,
                       CTR_TOP_FRAMEBUFFER_WIDTH, CTR_TOP_FRAMEBUFFER_HEIGHT,
                       o->texture.width, o->texture.height);

      ctr->overlay[i].alpha_mod = 1.0f;
   }

   return true;
}

static void ctr_overlay_enable(void *data, bool state)
{
   ctr_video_t *ctr = (ctr_video_t *)data;

   if (!ctr)
      return;

   ctr->overlay_enabled = state;
}

static void ctr_overlay_full_screen(void *data, bool enable)
{
   ctr_video_t *ctr = (ctr_video_t *)data;
   ctr->overlay_full_screen = enable;
}

static void ctr_overlay_set_alpha(void *data, unsigned image, float mod){ }

static void ctr_render_overlay(void *data)
{
   unsigned i;
   ctr_video_t *ctr = (ctr_video_t*)data;

   for (i = 0; i < ctr->overlays; i++)
   {
      ctrGuSetTexture(GPU_TEXUNIT0, VIRT_TO_PHYS(ctr->overlay[i].texture.data), ctr->overlay[i].texture.width, ctr->overlay[i].texture.height,
                      GPU_TEXTURE_MAG_FILTER(GPU_LINEAR) | GPU_TEXTURE_MIN_FILTER(GPU_LINEAR) |
                      GPU_TEXTURE_WRAP_S(GPU_CLAMP_TO_EDGE) | GPU_TEXTURE_WRAP_T(GPU_CLAMP_TO_EDGE),
                      GPU_RGBA8);

      GPUCMD_AddWrite(GPUREG_GSH_BOOLUNIFORM, 0);
      ctrGuSetVertexShaderFloatUniform(0, (float*)&ctr->overlay[i].scale_vector, 1);
      ctrGuSetAttributeBuffersAddress(VIRT_TO_PHYS(ctr->overlay[i].frame_coords));

      GPU_SetViewport(NULL,
                      VIRT_TO_PHYS(ctr->drawbuffers.top.left),
                      0, 0, CTR_TOP_FRAMEBUFFER_HEIGHT,
                      ctr->video_mode == CTR_VIDEO_MODE_2D_800X240 ? CTR_TOP_FRAMEBUFFER_WIDTH * 2 : CTR_TOP_FRAMEBUFFER_WIDTH);
      GPU_DrawArray(GPU_GEOMETRY_PRIM, 0, 1);

      if (ctr->video_mode == CTR_VIDEO_MODE_3D)
      {
         GPU_SetViewport(NULL,
                         VIRT_TO_PHYS(ctr->drawbuffers.top.right),
                         0, 0, CTR_TOP_FRAMEBUFFER_HEIGHT,
                         CTR_TOP_FRAMEBUFFER_WIDTH);
         GPU_DrawArray(GPU_GEOMETRY_PRIM, 0, 1);
      }
   }
}

static const video_overlay_interface_t ctr_overlay = {
   ctr_overlay_enable,
   ctr_overlay_load,
   ctr_overlay_tex_geom,
   ctr_overlay_vertex_geom,
   ctr_overlay_full_screen,
   ctr_overlay_set_alpha,
};

void ctr_overlay_interface(void *data, const video_overlay_interface_t **iface)
{
   ctr_video_t *ctr = (ctr_video_t *)data;

   if (!ctr)
      return;

   *iface = &ctr_overlay;
}
#endif

static void ctr_set_osd_msg(void *data,
      const char *msg,
      const void *params, void *font)
{
   ctr_video_t* ctr = (ctr_video_t*)data;

   if (ctr && ctr->msg_rendering_enabled)
      font_driver_render_msg(data, msg, params, font);
}

static uint32_t ctr_get_flags(void *data)
{
   uint32_t             flags   = 0;

   return flags;
}

static const video_poke_interface_t ctr_poke_interface = {
   ctr_get_flags,
   ctr_load_texture,
   ctr_unload_texture,
   NULL,
   NULL,
   ctr_set_filtering,
   NULL,                                  /* get_video_output_size */
   NULL,                                  /* get_video_output_prev */
   NULL,                                  /* get_video_output_next */
   NULL,                                  /* get_current_framebuffer */
   NULL,
   ctr_set_aspect_ratio,
   ctr_apply_state_changes,
   ctr_set_texture_frame,
   ctr_set_texture_enable,
   font_driver_render_msg, /* ctr_set_osd_msg*/
   NULL,                   /* show_mouse */
   NULL,                   /* grab_mouse_toggle */
   NULL,                   /* get_current_shader */
   NULL,                   /* get_current_software_framebuffer */
   NULL,                    /* get_hw_render_interface */
   NULL, /* set_hdr_max_nits */
   NULL, /* set_hdr_paper_white_nits */
   NULL, /* set_hdr_contrast */
   NULL  /* set_hdr_expand_gamut */
};

static void ctr_get_poke_interface(void* data,
                                   const video_poke_interface_t** iface)
{
   (void)data;
   *iface = &ctr_poke_interface;
}

#ifdef HAVE_GFX_WIDGETS
static bool ctr_gfx_widgets_enabled(void *data)
{
   (void)data;
   return true;
}
#endif

static bool ctr_set_shader(void* data,
                           enum rarch_shader_type type, const char* path)
{
   (void)data;
   (void)type;
   (void)path;

   return false;
}

video_driver_t video_ctr =
{
   ctr_init,
   ctr_frame,
   ctr_set_nonblock_state,
   ctr_alive,
   ctr_focus,
   ctr_suppress_screensaver,
   NULL, /* has_windowed */
   ctr_set_shader,
   ctr_free,
   "ctr",
   NULL, /* set_viewport */
   ctr_set_rotation,
   ctr_viewport_info,
   NULL, /* read_viewport  */
   NULL, /* read_frame_raw */
#ifdef HAVE_OVERLAY
   ctr_overlay_interface,
#endif
#ifdef HAVE_VIDEO_LAYOUT
   NULL,
#endif
   ctr_get_poke_interface,
   NULL,
#ifdef HAVE_GFX_WIDGETS
   ctr_gfx_widgets_enabled
#endif
};