/*
    SDL - Simple DirectMedia Layer
    Copyright (C) 1997-2009 Sam Lantinga

    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Lesser General Public
    License as published by the Free Software Foundation; either
    version 2.1 of the License, or (at your option) any later version.

    This library 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
    Lesser General Public License for more details.

    You should have received a copy of the GNU Lesser General Public
    License along with this library; if not, write to the Free Software
    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

    Sam Lantinga
    slouken@libsdl.org

    QNX Graphics Framework SDL driver
    Copyright (C) 2009 Mike Gorchak
    (mike@malva.ua, lestat@i.com.ua)
*/

#include "SDL_config.h"

#include "../SDL_sysvideo.h"
#include "SDL_version.h"
#include "SDL_syswm.h"
#include "SDL_loadso.h"

/* Include QNX Graphics Framework declarations */
#include <gf/gf.h>

#include "SDL_qnxgf.h"
#include "SDL_gf_render.h"
#include "SDL_gf_pixelfmt.h"
#include "SDL_gf_opengles.h"
#include "SDL_gf_input.h"

/******************************************************************************/
/* SDL Generic video modes, which could provide GF                            */
/* This is real pain in the ass. GF is just wrapper around a selected driver  */
/* some drivers could support double scan modes, like 320x200, 512x384, etc   */
/* but some drivers are not. Later we can distinguish one driver from another */
/* Feel free to add any new custom graphics mode                              */
/******************************************************************************/
static SDL_DisplayMode generic_mode[]=
{
   {0, 320,  200,  70,  NULL}, /* 320x200 modes are 70Hz and 85Hz          */
   {0, 320,  200,  85,  NULL},
   {0, 320,  240,  70,  NULL}, /* 320x240 modes are 70Hz and 85Hz          */
   {0, 320,  240,  85,  NULL},
   {0, 512,  384,  60,  NULL}, /* 512x384 modes are 60Hz and 70Hz          */
   {0, 512,  384,  70,  NULL},
   {0, 640,  480,  60,  NULL}, /* 640x480 modes are 60Hz, 75Hz, 85Hz       */
   {0, 640,  480,  75,  NULL},
   {0, 640,  480,  85,  NULL},
   {0, 800,  600,  60,  NULL}, /* 800x600 modes are 60Hz, 75Hz, 85Hz       */
   {0, 800,  600,  75,  NULL},
   {0, 800,  600,  85,  NULL},
   {0, 800,  480,  60,  NULL}, /* 800x480 mode is 60Hz only                */
   {0, 1024, 640,  60,  NULL}, /* 1024x640 mode is 60Hz only               */
   {0, 1024, 768,  60,  NULL}, /* 1024x768 modes are 60Hz, 70Hz, 75Hz      */
   {0, 1024, 768,  70,  NULL},
   {0, 1024, 768,  75,  NULL},
   {0, 1280, 720,  60,  NULL}, /* 1280x720 mode is 60Hz only               */
   {0, 1280, 768,  60,  NULL}, /* 1280x768 mode is 60Hz only               */
   {0, 1280, 800,  60,  NULL}, /* 1280x800 mode is 60Hz only               */
   {0, 1280, 960,  60,  NULL}, /* 1280x960 mode is 60Hz only               */
   {0, 1280, 1024, 60,  NULL}, /* 1280x1024 modes are 60Hz, 75Hz, 85Hz and */
   {0, 1280, 1024, 75,  NULL}, /* 100 Hz                                   */
   {0, 1280, 1024, 85,  NULL}, /*                                          */
   {0, 1280, 1024, 100, NULL}, /*                                          */
   {0, 1400, 1050, 60,  NULL}, /* 1400x1050 mode is 60Hz only              */
   {0, 1440, 900,  60,  NULL}, /* 1440x900 mode is 60Hz only               */
   {0, 1440, 960,  60,  NULL}, /* 1440x960 mode is 60Hz only               */
   {0, 1600, 1200, 60,  NULL}, /* 1600x1200 mode is 60Hz only              */
   {0, 1680, 1050, 60,  NULL}, /* 1680x1050 mode is 60Hz only              */
   {0, 1920, 1080, 60,  NULL}, /* 1920x1080 mode is 60Hz only              */
   {0, 1920, 1200, 60,  NULL}, /* 1920x1200 mode is 60Hz only              */
   {0, 2048, 1536, 60,  NULL}, /* 2048x1536 mode is 60Hz only              */
   {0, 2048, 1080, 60,  NULL}, /* 2048x1080 mode is 60Hz only              */
   {0,    0,    0,  0,  NULL}  /* End of generic mode list                 */
};

/* Low level device graphics driver names, which they are reporting */
GF_DeviceCaps gf_devicename[]=
{
   /* ATI Rage 128 graphics driver (devg-ati_rage128)      */
   {"ati_rage128", SDL_GF_ACCELERATED | SDL_GF_NOLOWRESOLUTION |
                   SDL_GF_UNACCELERATED_3D | SDL_GF_VIDEOMEMORY},
   /* Fujitsu Carmine graphics driver (devg-carmine.so)    */
   {"carmine",     SDL_GF_ACCELERATED | SDL_GF_NOLOWRESOLUTION |
                   SDL_GF_ACCELERATED_3D | SDL_GF_VIDEOMEMORY},
   /* C&T graphics driver (devg-chips.so)                  */
   {"chips",       SDL_GF_ACCELERATED | SDL_GF_NOLOWRESOLUTION | 
                   SDL_GF_UNACCELERATED_3D | SDL_GF_VIDEOMEMORY},
   /* Fujitsu Coral graphics driver (devg-coral.so)        */
   {"coral",       SDL_GF_ACCELERATED | SDL_GF_NOLOWRESOLUTION |
                   SDL_GF_ACCELERATED_3D | SDL_GF_VIDEOMEMORY},
   /* Intel integrated graphics driver (devg-extreme2.so)  */
   {"extreme2",    SDL_GF_ACCELERATED | SDL_GF_NOLOWRESOLUTION |
                   SDL_GF_ACCELERATED_3D | SDL_GF_VIDEOMEMORY},
   /* Unaccelerated FB driver (devg-flat.so)               */
   {"flat",        SDL_GF_UNACCELERATED | SDL_GF_LOWRESOLUTION |
                   SDL_GF_UNACCELERATED_3D | SDL_GF_NOVIDEOMEMORY},
   /* NS Geode graphics driver (devg-geode.so)             */
   {"geode",       SDL_GF_ACCELERATED | SDL_GF_NOLOWRESOLUTION |
                   SDL_GF_UNACCELERATED_3D | SDL_GF_VIDEOMEMORY},
   /* Geode LX graphics driver (devg-geodelx.so)           */
   {"geodelx",     SDL_GF_ACCELERATED | SDL_GF_LOWRESOLUTION |
                   SDL_GF_UNACCELERATED_3D | SDL_GF_VIDEOMEMORY},
   /* Intel integrated graphics driver (devg-gma9xx.so)    */
   {"gma",         SDL_GF_ACCELERATED | SDL_GF_NOLOWRESOLUTION |
                   SDL_GF_ACCELERATED_3D | SDL_GF_VIDEOMEMORY},
   /* Intel integrated graphics driver (devg-i810.so)      */
   {"i810",        SDL_GF_ACCELERATED | SDL_GF_NOLOWRESOLUTION |
                   SDL_GF_UNACCELERATED_3D | SDL_GF_VIDEOMEMORY},
   /* Intel integrated graphics driver (devg-i830.so)      */
   {"i830",        SDL_GF_ACCELERATED | SDL_GF_NOLOWRESOLUTION |
                   SDL_GF_UNACCELERATED_3D | SDL_GF_VIDEOMEMORY},
   /* Geode LX graphics driver (devg-lx800.so)             */
   {"lx800",       SDL_GF_ACCELERATED | SDL_GF_NOLOWRESOLUTION |
                   SDL_GF_UNACCELERATED_3D | SDL_GF_VIDEOMEMORY},
   /* Matrox Gxx graphics driver (devg-matroxg.so)         */
   {"matroxg",     SDL_GF_ACCELERATED | SDL_GF_NOLOWRESOLUTION |
                   SDL_GF_UNACCELERATED_3D | SDL_GF_VIDEOMEMORY},
   /* Intel Poulsbo graphics driver (devg-poulsbo.so)      */
   {"poulsbo",     SDL_GF_ACCELERATED | SDL_GF_NOLOWRESOLUTION |
                   SDL_GF_ACCELERATED_3D | SDL_GF_VIDEOMEMORY},
   /* ATI Radeon driver (devg-radeon.so)                   */
   {"radeon",      SDL_GF_ACCELERATED | SDL_GF_NOLOWRESOLUTION |
                   SDL_GF_UNACCELERATED_3D | SDL_GF_VIDEOMEMORY},
   /* ATI Rage driver (devg-rage.so)                       */
   {"rage",        SDL_GF_ACCELERATED | SDL_GF_NOLOWRESOLUTION |
                   SDL_GF_UNACCELERATED_3D | SDL_GF_VIDEOMEMORY},
   /* S3 Savage graphics driver (devg-s3_savage.so)        */
   {"s3_savage",   SDL_GF_ACCELERATED | SDL_GF_NOLOWRESOLUTION |
                   SDL_GF_UNACCELERATED_3D | SDL_GF_VIDEOMEMORY},
   /* SiS630 integrated graphics driver (devg-sis630.so)   */
   {"sis630",      SDL_GF_ACCELERATED | SDL_GF_NOLOWRESOLUTION |
                   SDL_GF_UNACCELERATED_3D | SDL_GF_VIDEOMEMORY},
   /* PowerVR SGX 535 graphics driver (devg-poulsbo.so)    */
   {"sgx",         SDL_GF_ACCELERATED | SDL_GF_NOLOWRESOLUTION |
                   SDL_GF_ACCELERATED_3D | SDL_GF_VIDEOMEMORY},
   /* SM Voyager GX graphics driver (devg-smi5xx.so)       */
   {"smi5xx",      SDL_GF_ACCELERATED | SDL_GF_NOLOWRESOLUTION |
                   SDL_GF_UNACCELERATED_3D | SDL_GF_VIDEOMEMORY},
   /* Silicon Motion graphics driver (devg-smi7xx.so)      */
   {"smi7xx",      SDL_GF_ACCELERATED | SDL_GF_NOLOWRESOLUTION |
                   SDL_GF_UNACCELERATED_3D | SDL_GF_VIDEOMEMORY},
   /* SVGA unaccelerated gfx driver (devg-svga.so)         */
   {"svga",        SDL_GF_UNACCELERATED | SDL_GF_LOWRESOLUTION |
                   SDL_GF_UNACCELERATED_3D | SDL_GF_NOVIDEOMEMORY},
   /* nVidia TNT graphics driver (devg-tnt.so)             */
   {"tnt",         SDL_GF_ACCELERATED | SDL_GF_NOLOWRESOLUTION |
                   SDL_GF_UNACCELERATED_3D | SDL_GF_VIDEOMEMORY},
   /* VIA integrated graphics driver (devg-tvia.so)        */
   {"tvia",        SDL_GF_ACCELERATED | SDL_GF_NOLOWRESOLUTION |
                   SDL_GF_UNACCELERATED_3D | SDL_GF_VIDEOMEMORY},
   /* VIA UniChrome graphics driver (devg-unichrome.so)    */
   {"unichrome",   SDL_GF_ACCELERATED | SDL_GF_NOLOWRESOLUTION | 
                   SDL_GF_UNACCELERATED_3D | SDL_GF_VIDEOMEMORY},
   /* VESA unaccelerated gfx driver (devg-vesa.so)         */
   {"vesa",        SDL_GF_UNACCELERATED | SDL_GF_LOWRESOLUTION |
                   SDL_GF_UNACCELERATED_3D | SDL_GF_NOVIDEOMEMORY},
   /* VmWare graphics driver (devg-volari.so)              */
   {"vmware",      SDL_GF_ACCELERATED | SDL_GF_LOWRESOLUTION |
                   SDL_GF_UNACCELERATED_3D | SDL_GF_NOVIDEOMEMORY},
   /* XGI XP10 graphics driver (devg-volari.so)            */
   {"volari",      SDL_GF_ACCELERATED | SDL_GF_LOWRESOLUTION |
                   SDL_GF_UNACCELERATED_3D | SDL_GF_VIDEOMEMORY},
   /* End of list */
   {NULL,          0x00000000}
};

/*****************************************************************************/
/* SDL Video Device initialization functions                                 */
/*****************************************************************************/

static int qnxgf_available(void)
{
   gf_dev_t gfdev;
   gf_dev_info_t gfdev_info;
   int status;

   /* Try to attach to graphics device driver */
   status=gf_dev_attach(&gfdev, GF_DEVICE_INDEX(0), &gfdev_info);
   if (status!=GF_ERR_OK)
   {
      return 0;
   }

   /* Detach from graphics device driver for now */
   gf_dev_detach(gfdev);

   return 1;
}

static void qnxgf_destroy(SDL_VideoDevice* device)
{
   SDL_VideoData* gfdata=(SDL_VideoData*) device->driverdata;

   /* Detach from graphics device driver, if it was initialized */
   if (gfdata->gfinitialized!=SDL_FALSE)
   {
      gf_dev_detach(gfdata->gfdev);
      gfdata->gfdev=NULL;
   }

   if (device->driverdata!=NULL)
   {
      device->driverdata=NULL;
   }
}

static SDL_VideoDevice* qnxgf_create(int devindex)
{
   SDL_VideoDevice* device;
   SDL_VideoData*   gfdata;
   int              status;

   /* Initialize SDL_VideoDevice structure */
   device=(SDL_VideoDevice*)SDL_calloc(1, sizeof(SDL_VideoDevice));
   if (device==NULL)
   {
      SDL_OutOfMemory();
      return NULL;
   }

   /* Initialize internal GF specific data */
   gfdata=(SDL_VideoData*)SDL_calloc(1, sizeof(SDL_VideoData));
   if (gfdata==NULL)
   {
      SDL_OutOfMemory();
      SDL_free(device);
      return NULL;
   }
   device->driverdata=gfdata;

   /* Try to attach to graphics device driver */
   status=gf_dev_attach(&gfdata->gfdev, GF_DEVICE_INDEX(devindex), &gfdata->gfdev_info);
   if (status!=GF_ERR_OK)
   {
      SDL_OutOfMemory();
      SDL_free(gfdata);
      SDL_free(device);
      return NULL;
   }

   if (gfdata->gfdev_info.description==NULL)
   {
      gf_dev_detach(gfdata->gfdev);
      SDL_SetError("GF: Failed to initialize graphics driver");
      return NULL;
   }

   /* Setup amount of available displays and current display */
   device->num_displays=0;
   device->current_display=0;

   /* Setup device shutdown function */
   gfdata->gfinitialized=SDL_TRUE;
   device->free=qnxgf_destroy;

   /* Setup all functions which we can handle */
   device->VideoInit=qnxgf_videoinit;
   device->VideoQuit=qnxgf_videoquit;
   device->GetDisplayModes=qnxgf_getdisplaymodes;
   device->SetDisplayMode=qnxgf_setdisplaymode;
   device->SetDisplayPalette=qnxgf_setdisplaypalette;
   device->GetDisplayPalette=qnxgf_getdisplaypalette;
   device->SetDisplayGammaRamp=qnxgf_setdisplaygammaramp;
   device->GetDisplayGammaRamp=qnxgf_getdisplaygammaramp;
   device->CreateWindow=qnxgf_createwindow;
   device->CreateWindowFrom=qnxgf_createwindowfrom;
   device->SetWindowTitle=qnxgf_setwindowtitle;
   device->SetWindowIcon=qnxgf_setwindowicon;
   device->SetWindowPosition=qnxgf_setwindowposition;
   device->SetWindowSize=qnxgf_setwindowsize;
   device->ShowWindow=qnxgf_showwindow;
   device->HideWindow=qnxgf_hidewindow;
   device->RaiseWindow=qnxgf_raisewindow;
   device->MaximizeWindow=qnxgf_maximizewindow;
   device->MinimizeWindow=qnxgf_minimizewindow;
   device->RestoreWindow=qnxgf_restorewindow;
   device->SetWindowGrab=qnxgf_setwindowgrab;
   device->DestroyWindow=qnxgf_destroywindow;
   device->GetWindowWMInfo=qnxgf_getwindowwminfo;
   device->GL_LoadLibrary=qnxgf_gl_loadlibrary;
   device->GL_GetProcAddress=qnxgf_gl_getprocaddres;
   device->GL_UnloadLibrary=qnxgf_gl_unloadlibrary;
   device->GL_CreateContext=qnxgf_gl_createcontext;
   device->GL_MakeCurrent=qnxgf_gl_makecurrent;
   device->GL_SetSwapInterval=qnxgf_gl_setswapinterval;
   device->GL_GetSwapInterval=qnxgf_gl_getswapinterval;
   device->GL_SwapWindow=qnxgf_gl_swapwindow;
   device->GL_DeleteContext=qnxgf_gl_deletecontext;
   device->PumpEvents=qnxgf_pumpevents;
   device->SuspendScreenSaver=qnxgf_suspendscreensaver;

   return device;
}

VideoBootStrap qnxgf_bootstrap=
{
   "qnxgf",
   "SDL QNX Graphics Framework (GF) video driver",
   qnxgf_available,
   qnxgf_create
};

/*****************************************************************************/
/* SDL Video and Display initialization/handling functions                   */
/*****************************************************************************/
int qnxgf_videoinit(_THIS)
{
   SDL_VideoData* gfdata=(SDL_VideoData*)_this->driverdata;
   uint32_t it;
   uint32_t jt;
   char* override;
   int32_t status;

   /* By default GF uses buffer swap on vsync */
   gfdata->swapinterval=1;

   /* Add each detected output to SDL */
   for (it=0; it<gfdata->gfdev_info.ndisplays; it++)
   {
      SDL_VideoDisplay  display;
      SDL_DisplayMode   current_mode;
      SDL_DisplayData*  didata;

      didata=(SDL_DisplayData*)SDL_calloc(1, sizeof(SDL_DisplayData));
      if (didata==NULL)
      {
         /* memory allocation problem */
         SDL_OutOfMemory();
         return -1;
      }

      /* Set default cursor settings, maximum 128x128 cursor */
      didata->cursor_visible=SDL_FALSE;
      didata->cursor.type=GF_CURSOR_BITMAP;
      didata->cursor.hotspot.x=0;
      didata->cursor.hotspot.y=0;
      didata->cursor.cursor.bitmap.w=SDL_VIDEO_GF_MAX_CURSOR_SIZE;
      didata->cursor.cursor.bitmap.h=SDL_VIDEO_GF_MAX_CURSOR_SIZE;
      didata->cursor.cursor.bitmap.stride=(didata->cursor.cursor.bitmap.w+7)/
                                          (sizeof(uint8_t)*8);
      didata->cursor.cursor.bitmap.color0=0x00000000;
      didata->cursor.cursor.bitmap.color1=0x00000000;
      didata->cursor.cursor.bitmap.image0=SDL_calloc(sizeof(uint8_t), (didata->cursor.cursor.bitmap.w+7)*
                                          didata->cursor.cursor.bitmap.h/(sizeof(uint8_t)*8));
      if (didata->cursor.cursor.bitmap.image0==NULL)
      {
         SDL_free(didata);
         SDL_OutOfMemory();
         return -1;
      }
      didata->cursor.cursor.bitmap.image1=SDL_calloc(sizeof(uint8_t), (didata->cursor.cursor.bitmap.w+7)*
                                   didata->cursor.cursor.bitmap.h/(sizeof(uint8_t)*8));
      if (didata->cursor.cursor.bitmap.image1==NULL)
      {
         SDL_OutOfMemory();
         SDL_free((void*)didata->cursor.cursor.bitmap.image0);
         SDL_free(didata);
         return -1;
      }

      /* Query current display settings */
      status=gf_display_query(gfdata->gfdev, it, &didata->display_info);
      if (status==GF_ERR_OK)
      {
         SDL_zero(current_mode);
         current_mode.w=didata->display_info.xres;
         current_mode.h=didata->display_info.yres;
         current_mode.refresh_rate=didata->display_info.refresh;
         current_mode.format=qnxgf_gf_to_sdl_pixelformat(didata->display_info.format);
         current_mode.driverdata=NULL;
      }
      else
      {
         /* video initialization problem */
         SDL_free((void*)didata->cursor.cursor.bitmap.image0);
         SDL_free((void*)didata->cursor.cursor.bitmap.image1);
         SDL_free(didata);
         SDL_SetError("GF: Display query failed");
         return -1;
      }

      /* Attach GF to selected display */
      status=gf_display_attach(&didata->display, gfdata->gfdev, it, NULL);
      if (status!=GF_ERR_OK)
      {
         /* video initialization problem */
         SDL_free((void*)didata->cursor.cursor.bitmap.image0);
         SDL_free((void*)didata->cursor.cursor.bitmap.image1);
         SDL_free(didata);
         SDL_SetError("GF: Couldn't attach to display");
         return -1;
      }

      /* Initialize status variables */
      didata->layer_attached=SDL_FALSE;

      /* Attach to main display layer */
      status=gf_layer_attach(&didata->layer, didata->display, didata->display_info.main_layer_index, 0);
      if (status!=GF_ERR_OK)
      {
         /* Failed to attach to main layer */
         SDL_free((void*)didata->cursor.cursor.bitmap.image0);
         SDL_free((void*)didata->cursor.cursor.bitmap.image1);
         SDL_free(didata);
         SDL_SetError("GF: Couldn't attach to main layer, it could be busy");
         return -1;
      }

      /* Mark main display layer is attached */
      didata->layer_attached=SDL_TRUE;

      /* Set layer source and destination viewport */
      gf_layer_set_src_viewport(didata->layer, 0, 0, current_mode.w-1, current_mode.h-1);
      gf_layer_set_dst_viewport(didata->layer, 0, 0, current_mode.w-1, current_mode.h-1);

      /* Create main visible on display surface */
      status=gf_surface_create_layer(&didata->surface[0], &didata->layer,
             1, 0, current_mode.w, current_mode.h,
             qnxgf_sdl_to_gf_pixelformat(current_mode.format),
             NULL, GF_SURFACE_CREATE_2D_ACCESSIBLE | GF_SURFACE_CREATE_3D_ACCESSIBLE |
             GF_SURFACE_CREATE_SHAREABLE);
      if (status!=GF_ERR_OK)
      {
         gf_layer_disable(didata->layer);
         gf_layer_detach(didata->layer);
         didata->layer_attached=SDL_FALSE;
         SDL_free((void*)didata->cursor.cursor.bitmap.image0);
         SDL_free((void*)didata->cursor.cursor.bitmap.image1);
         SDL_free(didata);
         SDL_SetError("GF: Can't create main layer surface at init (%d)\n", status);
         return -1;
      }

      /* Set just created surface as main visible on the layer */
//      gf_layer_set_surfaces(didata->layer, &didata->surface[0], 1);

      /* Update layer parameters */
      status=gf_layer_update(didata->layer, GF_LAYER_UPDATE_NO_WAIT_IDLE);
      if (status!=GF_ERR_OK)
      {
         /* Free allocated surface */
         gf_surface_free(didata->surface[0]);
         didata->surface[0]=NULL;

         /* Disable and detach from layer */
         gf_layer_disable(didata->layer);
         gf_layer_detach(didata->layer);
         didata->layer_attached=SDL_FALSE;
         SDL_free((void*)didata->cursor.cursor.bitmap.image0);
         SDL_free((void*)didata->cursor.cursor.bitmap.image1);
         SDL_free(didata);
         SDL_SetError("GF: Can't update layer parameters\n");
         return -1;
      }

      /* Enable layer in case if hardware supports layer enable/disable */
      gf_layer_enable(didata->layer);

      /* Copy device name for each display */
      SDL_strlcpy(didata->description, gfdata->gfdev_info.description, SDL_VIDEO_GF_DEVICENAME_MAX-1);

      /* Search device capabilities and possible workarounds */
      jt=0;
      do {
         if (gf_devicename[jt].name==NULL)
         {
            break;
         }
         if (SDL_strncmp(gf_devicename[jt].name, didata->description, SDL_strlen(gf_devicename[jt].name))==0)
         {
            didata->caps=gf_devicename[jt].caps;
         }
         jt++;
      } while(1);

      /* Initialize display structure */
      SDL_zero(display);
      display.desktop_mode=current_mode;
      display.current_mode=current_mode;
      display.driverdata=didata;
      didata->current_mode=current_mode;
      SDL_AddVideoDisplay(&display);

      /* Check for environment variables which could override some SDL settings */
      didata->custom_refresh=0;
      override = SDL_getenv("SDL_VIDEO_GF_REFRESH_RATE");
      if (override!=NULL)
      {
         if (SDL_sscanf(override, "%u", &didata->custom_refresh)!=1)
         {
            didata->custom_refresh=0;
         }
      }

      /* Get all display modes for this display */
      _this->current_display=it;
      qnxgf_getdisplaymodes(_this);
   }

   /* Restore default display */
   _this->current_display=0;

   /* Add GF renderer to SDL */
   gf_addrenderdriver(_this);

   /* Add GF input devices */
   status=gf_addinputdevices(_this);
   if (status!=0)
   {
      /* SDL error is set by gf_addinputdevices() function */
      return -1;
   }

   /* video has been initialized successfully */
   return 1;
}

void qnxgf_videoquit(_THIS)
{
   SDL_DisplayData* didata=NULL;
   uint32_t it;

   /* Stop collecting mouse events */
   hiddi_disable_mouse();
   /* Delete GF input devices */
   gf_delinputdevices(_this);

   /* SDL will restore old desktop mode on exit */
   for(it=0; it<_this->num_displays; it++)
   {
      didata=_this->displays[it].driverdata;

      /* Free cursor image */
      if (didata->cursor.cursor.bitmap.image0!=NULL)
      {
         SDL_free((void*)didata->cursor.cursor.bitmap.image0);
         didata->cursor.cursor.bitmap.image0=NULL;
      }
      if (didata->cursor.cursor.bitmap.image1!=NULL)
      {
         SDL_free((void*)didata->cursor.cursor.bitmap.image1);
         didata->cursor.cursor.bitmap.image1=NULL;
      }

      /* Free main surface */
      if (didata->surface[0]!=NULL)
      {
         gf_surface_free(didata->surface[0]);
         didata->surface[0]=NULL;
      }

      /* Free back surface */
      if (didata->surface[1]!=NULL)
      {
         gf_surface_free(didata->surface[1]);
         didata->surface[1]=NULL;
      }

      /* Free second back surface */
      if (didata->surface[2]!=NULL)
      {
         gf_surface_free(didata->surface[2]);
         didata->surface[2]=NULL;
      }

      /* Detach layer before quit */
      if (didata->layer_attached==SDL_TRUE)
      {
         /* Disable layer if hardware supports this */
         gf_layer_disable(didata->layer);

         /* Detach from layer, free it for others */
         gf_layer_detach(didata->layer);
         didata->layer=NULL;

         /* Mark it as detached */
         didata->layer_attached=SDL_FALSE;
      }

      /* Detach from selected display */
      gf_display_detach(didata->display);
      didata->display=NULL;
   }
}

void qnxgf_getdisplaymodes(_THIS)
{
   SDL_DisplayData* didata=(SDL_DisplayData*)SDL_CurrentDisplay.driverdata;
   SDL_DisplayMode  mode;
   gf_modeinfo_t    modeinfo;
   uint32_t it=0;
   uint32_t jt=0;
   uint32_t kt=0;
   int      status;

   do {
      status=gf_display_query_mode(didata->display, it, &modeinfo);
      if (status==GF_ERR_OK)
      {
         /* Parsing current mode */
         if ((modeinfo.flags & GF_MODE_GENERIC)==GF_MODE_GENERIC)
         {
            /* This mode is generic, so we can add to SDL our resolutions */
            /* Only pixel format is fixed, refresh rate could be any      */
            jt=0;
            do {
               if (generic_mode[jt].w==0)
               {
                  break;
               }

               /* Check if driver do not supports doublescan video modes */
               if ((didata->caps & SDL_GF_LOWRESOLUTION)!=SDL_GF_LOWRESOLUTION)
               {
                  if (generic_mode[jt].w<640)
                  {
                     jt++;
                     continue;
                  }
               }

               mode.w=generic_mode[jt].w;
               mode.h=generic_mode[jt].h;
               mode.refresh_rate=generic_mode[jt].refresh_rate;
               mode.format=qnxgf_gf_to_sdl_pixelformat(modeinfo.primary_format);
               mode.driverdata=NULL;
               SDL_AddDisplayMode(_this->current_display, &mode);

               jt++;
            } while(1);
         }
         else
         {
            /* Add this display mode as is in case if it is non-generic */
            /* But go through the each refresh rate, supported by gf    */
            jt=0;
            do {
               if (modeinfo.refresh[jt]!=0)
               {
                  mode.w=modeinfo.xres;
                  mode.h=modeinfo.yres;
                  mode.refresh_rate=modeinfo.refresh[jt];
                  mode.format=qnxgf_gf_to_sdl_pixelformat(modeinfo.primary_format);
                  mode.driverdata=NULL;
                  SDL_AddDisplayMode(_this->current_display, &mode);
                  jt++;
               }
               else
               {
                  break;
               }
            } while(1);
         }
      }
      else
      {
         if (status==GF_ERR_PARM)
         {
            /* out of available modes, all are listed */
            break;
         }

         /* Error occured during mode listing */
         break;
      }
      it++;
   } while(1);
}

int qnxgf_setdisplaymode(_THIS, SDL_DisplayMode* mode)
{
   SDL_DisplayData* didata=(SDL_DisplayData*)SDL_CurrentDisplay.driverdata;
   uint32_t refresh_rate=0;
   int status;

   /* Current display dimensions and bpp are no more valid */
   didata->current_mode.format=SDL_PIXELFORMAT_UNKNOWN;
   didata->current_mode.w=0;
   didata->current_mode.h=0;

   /* Check if custom refresh rate requested */
   if (didata->custom_refresh!=0)
   {
      refresh_rate=didata->custom_refresh;
   }
   else
   {
      refresh_rate=mode->refresh_rate;
   }

   /* Check if SDL GF driver needs to find appropriate refresh rate itself */
   if (refresh_rate==0)
   {
      uint32_t it;
      SDL_DisplayMode tempmode;

      /* Clear display mode structure */
      SDL_memset(&tempmode, 0x00, sizeof(SDL_DisplayMode));
      tempmode.refresh_rate=0x0000FFFF;

      /* Check if window width and height matches one of our modes */
      for (it=0; it<SDL_CurrentDisplay.num_display_modes; it++)
      {
         if ((SDL_CurrentDisplay.display_modes[it].w==mode->w) &&
             (SDL_CurrentDisplay.display_modes[it].h==mode->h) &&
             (SDL_CurrentDisplay.display_modes[it].format==mode->format))
         {
            /* Find the lowest refresh rate available */
            if (tempmode.refresh_rate>SDL_CurrentDisplay.display_modes[it].refresh_rate)
            {
               tempmode=SDL_CurrentDisplay.display_modes[it];
            }
         }
      }
      if (tempmode.refresh_rate!=0x0000FFFF)
      {
         refresh_rate=tempmode.refresh_rate;
      }
      else
      {
         /* Let video driver decide what to do with this */
         refresh_rate=0;
      }
   }

   /* Check if SDL GF driver needs to check custom refresh rate */
   if (didata->custom_refresh!=0)
   {
      uint32_t it;
      SDL_DisplayMode tempmode;

      /* Clear display mode structure */
      SDL_memset(&tempmode, 0x00, sizeof(SDL_DisplayMode));
      tempmode.refresh_rate=0x0000FFFF;

      /* Check if window width and height matches one of our modes */
      for (it=0; it<SDL_CurrentDisplay.num_display_modes; it++)
      {
         if ((SDL_CurrentDisplay.display_modes[it].w==mode->w) &&
             (SDL_CurrentDisplay.display_modes[it].h==mode->h) &&
             (SDL_CurrentDisplay.display_modes[it].format==mode->format))
         {
            /* Find the lowest refresh rate available */
            if (tempmode.refresh_rate>SDL_CurrentDisplay.display_modes[it].refresh_rate)
            {
               tempmode=SDL_CurrentDisplay.display_modes[it];
            }

            /* Check if requested refresh rate found */
            if (refresh_rate==SDL_CurrentDisplay.display_modes[it].refresh_rate)
            {
               tempmode=SDL_CurrentDisplay.display_modes[it];
               break;
            }
         }
      }
      if (tempmode.refresh_rate!=0x0000FFFF)
      {
         refresh_rate=tempmode.refresh_rate;
      }
      else
      {
         /* Let video driver decide what to do with this */
         refresh_rate=0;
      }
   }

   /* Free main surface */
   if (didata->surface[0]!=NULL)
   {
      gf_surface_free(didata->surface[0]);
      didata->surface[0]=NULL;
   }

   /* Free back surface */
   if (didata->surface[1]!=NULL)
   {
      gf_surface_free(didata->surface[1]);
      didata->surface[1]=NULL;
   }

   /* Free second back surface */
   if (didata->surface[2]!=NULL)
   {
      gf_surface_free(didata->surface[2]);
      didata->surface[2]=NULL;
   }

   /* Detach layer before switch to new graphics mode */
   if (didata->layer_attached==SDL_TRUE)
   {
      /* Disable layer if hardware supports this */
      gf_layer_disable(didata->layer);

      /* Detach from layer, free it for others */
      gf_layer_detach(didata->layer);

      /* Mark it as detached */
      didata->layer_attached=SDL_FALSE;
   }

   /* Set new display video mode */
   status=gf_display_set_mode(didata->display, mode->w, mode->h, refresh_rate,
                              qnxgf_sdl_to_gf_pixelformat(mode->format), 0);
   if (status!=GF_ERR_OK)
   {
      /* Display mode/resolution switch has been failed */
      SDL_SetError("GF: Mode is not supported by graphics driver");
      return -1;
   }
   else
   {
      didata->current_mode=*mode;
      didata->current_mode.refresh_rate=refresh_rate;
   }

   /* Attach to main display layer */
   status=gf_layer_attach(&didata->layer, didata->display, didata->display_info.main_layer_index, 0);
   if (status!=GF_ERR_OK)
   {
      SDL_SetError("GF: Couldn't attach to main layer, it could be busy");

      /* Failed to attach to main displayable layer */
      return -1;
   }

   /* Mark main display layer is attached */
   didata->layer_attached=SDL_TRUE;

   /* Set layer source and destination viewport */
   gf_layer_set_src_viewport(didata->layer, 0, 0, mode->w-1, mode->h-1);
   gf_layer_set_dst_viewport(didata->layer, 0, 0, mode->w-1, mode->h-1);

   /* Create main visible on display surface */
   status=gf_surface_create_layer(&didata->surface[0], &didata->layer, 1, 0,
          mode->w, mode->h, qnxgf_sdl_to_gf_pixelformat(mode->format),
          NULL, GF_SURFACE_CREATE_2D_ACCESSIBLE | GF_SURFACE_CREATE_3D_ACCESSIBLE |
          GF_SURFACE_CREATE_SHAREABLE);
   if (status!=GF_ERR_OK)
   {
      gf_layer_disable(didata->layer);
      gf_layer_detach(didata->layer);
      didata->layer_attached=SDL_FALSE;
      SDL_SetError("GF: Can't create main layer surface at modeswitch (%d)\n", status);
      return -1;
   }

   /* Set just created surface as main visible on the layer */
   gf_layer_set_surfaces(didata->layer, &didata->surface[0], 1);

   /* Update layer parameters */
   status=gf_layer_update(didata->layer, GF_LAYER_UPDATE_NO_WAIT_IDLE);
   if (status!=GF_ERR_OK)
   {
      /* Free main surface */
      gf_surface_free(didata->surface[0]);
      didata->surface[0]=NULL;

      /* Detach layer */
      gf_layer_disable(didata->layer);
      gf_layer_detach(didata->layer);
      didata->layer_attached=SDL_FALSE;
      SDL_SetError("GF: Can't update layer parameters\n");
      return -1;
   }

   /* Restore cursor if it was visible */
   if (didata->cursor_visible==SDL_TRUE)
   {
      gf_cursor_set(didata->display, 0, &didata->cursor);
      gf_cursor_enable(didata->display, 0);
   }

   /* Enable layer in case if hardware supports layer enable/disable */
   gf_layer_enable(didata->layer);

   return 0;
}

int qnxgf_setdisplaypalette(_THIS, SDL_Palette* palette)
{
   SDL_DisplayData* didata=(SDL_DisplayData*)SDL_CurrentDisplay.driverdata;

   /* QNX GF doesn't have support for global palette changing, but we */
   /* could store it for usage in future */

   /* Setting display palette operation has been failed */
   return -1;
}

int qnxgf_getdisplaypalette(_THIS, SDL_Palette* palette)
{
   SDL_DisplayData* didata=(SDL_DisplayData*)SDL_CurrentDisplay.driverdata;

   /* We can't provide current palette settings and looks like SDL          */
   /* do not call this function also, in such case this function returns -1 */

   /* Getting display palette operation has been failed */
   return -1;
}

int qnxgf_setdisplaygammaramp(_THIS, Uint16* ramp)
{
   SDL_DisplayData* didata=(SDL_DisplayData*)SDL_CurrentDisplay.driverdata;
   int status;

   /* Setup gamma ramp, for each color channel */
   status=gf_display_set_color_lut16(didata->display, (uint16_t*)ramp, (uint16_t*)ramp+256, (uint16_t*)ramp+512);
   if (status!=GF_ERR_OK)
   {
      /* Setting display gamma ramp operation has been failed */
      return -1;
   }

   return 0;
}

int qnxgf_getdisplaygammaramp(_THIS, Uint16* ramp)
{
   /* TODO: We need to return previous gamma set           */
   /*       Also we need some initial fake gamma to return */

   /* Getting display gamma ramp operation has been failed */
   return -1;
}

int qnxgf_createwindow(_THIS, SDL_Window* window)
{
   SDL_VideoData*   gfdata=(SDL_VideoData*)_this->driverdata;
   SDL_DisplayData* didata=(SDL_DisplayData*)SDL_CurrentDisplay.driverdata;
   SDL_WindowData*  wdata;
   int32_t          status;

   /* QNX GF supports fullscreen window modes only */
   if ((window->flags & SDL_WINDOW_FULLSCREEN)!=SDL_WINDOW_FULLSCREEN)
   {
      uint32_t it;
      SDL_DisplayMode mode;

      /* Clear display mode structure */
      SDL_memset(&mode, 0x00, sizeof(SDL_DisplayMode));
      mode.refresh_rate=0x0000FFFF;

      /* Check if window width and height matches one of our modes */
      for (it=0; it<SDL_CurrentDisplay.num_display_modes; it++)
      {
         if ((SDL_CurrentDisplay.display_modes[it].w==window->w) &&
             (SDL_CurrentDisplay.display_modes[it].h==window->h) &&
             (SDL_CurrentDisplay.display_modes[it].format==SDL_CurrentDisplay.desktop_mode.format))
         {
            /* Find the lowest refresh rate available */
            if (mode.refresh_rate>SDL_CurrentDisplay.display_modes[it].refresh_rate)
            {
               mode=SDL_CurrentDisplay.display_modes[it];
            }
         }
      }

      /* Check if end of display list has been reached */
      if (mode.refresh_rate==0x0000FFFF)
      {
         SDL_SetError("GF: Desired video mode is not supported");

         /* Failed to create new window */
         return -1;
      }
      else
      {
         /* Tell to the caller that mode will be fullscreen */
         window->flags|=SDL_WINDOW_FULLSCREEN;

         /* Setup fullscreen mode, bpp used from desktop mode in this case */
         status=qnxgf_setdisplaymode(_this, &mode);
         if (status!=0)
         {
            /* Failed to swith fullscreen video mode */
            return -1;
         }
      }
   }

   /* Setup our own window decorations and states, which are depend on fullscreen mode */
   window->flags|=SDL_WINDOW_SHOWN | SDL_WINDOW_BORDERLESS |
                  SDL_WINDOW_MAXIMIZED | SDL_WINDOW_INPUT_GRABBED |
                  SDL_WINDOW_INPUT_FOCUS | SDL_WINDOW_MOUSE_FOCUS;
   window->flags&=~(SDL_WINDOW_RESIZABLE | SDL_WINDOW_MINIMIZED);

   /* Ignore any window position settings */
   window->x=SDL_WINDOWPOS_UNDEFINED;
   window->y=SDL_WINDOWPOS_UNDEFINED;

   /* Allocate window internal data */
   wdata=(SDL_WindowData*)SDL_calloc(1, sizeof(SDL_WindowData));
   if (wdata==NULL)
   {
      SDL_OutOfMemory();
      return -1;
   }

   /* Setup driver data for this window */
   window->driverdata=wdata;

   /* Check if window must support OpenGL ES rendering */
   if ((window->flags & SDL_WINDOW_OPENGL)==SDL_WINDOW_OPENGL)
   {
      #if defined(SDL_VIDEO_OPENGL_ES)
         EGLBoolean initstatus;

         /* Mark this window as OpenGL ES compatible */
         wdata->uses_gles=SDL_TRUE;

         /* Create connection to OpenGL ES */
         if (gfdata->egldisplay==EGL_NO_DISPLAY)
         {
            gfdata->egldisplay=eglGetDisplay(gfdata->gfdev);
            if (gfdata->egldisplay==EGL_NO_DISPLAY)
            {
               SDL_SetError("GF: Can't get connection to OpenGL ES");
               return -1;
            }

            /* Initialize OpenGL ES library, ignore EGL version */
            initstatus=eglInitialize(gfdata->egldisplay, NULL, NULL);
            if (initstatus!=EGL_TRUE)
            {
               SDL_SetError("GF: Can't init OpenGL ES library");
               return -1;
            }
         }

         /* Increment GL ES reference count usage */
         gfdata->egl_refcount++;
      #else
         SDL_SetError("GF: OpenGL ES support is not compiled in");
         return -1;
      #endif /* SDL_VIDEO_OPENGL_ES */
   }

   /* Enable mouse event collecting */
   hiddi_enable_mouse();

   /* By default last created window got a input focus */
   SDL_SetKeyboardFocus(0, window->id);
   SDL_SetMouseFocus(0, window->id);

   /* Window has been successfully created */
   return 0;
}

int qnxgf_createwindowfrom(_THIS, SDL_Window* window, const void* data)
{
   /* Failed to create window from another window */
   return -1;
}

void qnxgf_setwindowtitle(_THIS, SDL_Window* window)
{
}

void qnxgf_setwindowicon(_THIS, SDL_Window* window, SDL_Surface* icon)
{
}

void qnxgf_setwindowposition(_THIS, SDL_Window* window)
{
}

void qnxgf_setwindowsize(_THIS, SDL_Window* window)
{
}

void qnxgf_showwindow(_THIS, SDL_Window* window)
{
}

void qnxgf_hidewindow(_THIS, SDL_Window* window)
{
}

void qnxgf_raisewindow(_THIS, SDL_Window* window)
{
}

void qnxgf_maximizewindow(_THIS, SDL_Window* window)
{
}

void qnxgf_minimizewindow(_THIS, SDL_Window* window)
{
}

void qnxgf_restorewindow(_THIS, SDL_Window* window)
{
}

void qnxgf_setwindowgrab(_THIS, SDL_Window* window)
{
}

void qnxgf_destroywindow(_THIS, SDL_Window* window)
{
   SDL_VideoData*   gfdata=(SDL_VideoData*)_this->driverdata;
   SDL_DisplayData* didata=(SDL_DisplayData*)SDL_CurrentDisplay.driverdata;
   SDL_WindowData*  wdata=(SDL_WindowData*)window->driverdata;

   if (wdata!=NULL)
   {
      #if defined(SDL_VIDEO_OPENGL_ES)
         /* Destroy OpenGL ES surface if it was created */
         if (wdata->gles_surface!=EGL_NO_SURFACE)
         {
            eglDestroySurface(gfdata->egldisplay, wdata->gles_surface);
         }

         /* Free any 3D target if it was created before */
         if (wdata->target_created==SDL_TRUE)
         {
            gf_3d_target_free(wdata->target);
            wdata->target_created==SDL_FALSE;
         }

         gfdata->egl_refcount--;
         if (gfdata->egl_refcount==0)
         {
            /* Terminate connection to OpenGL ES */
            if (gfdata->egldisplay!=EGL_NO_DISPLAY)
            {
               eglTerminate(gfdata->egldisplay);
               gfdata->egldisplay=EGL_NO_DISPLAY;
            }
         }
      #endif /* SDL_VIDEO_OPENGL_ES */
   }
}

/*****************************************************************************/
/* SDL Window Manager function                                               */
/*****************************************************************************/
SDL_bool qnxgf_getwindowwminfo(_THIS, SDL_Window* window, struct SDL_SysWMinfo* info)
{
   /* QNX GF do not operates at window level, this means we are have no */
   /* Window Manager available, no specific data in SDL_SysWMinfo too   */

   if (info->version.major<=SDL_MAJOR_VERSION)
   {
      return SDL_TRUE;
   }
   else
   {
      SDL_SetError("Application not compiled with SDL %d.%d\n", SDL_MAJOR_VERSION, SDL_MINOR_VERSION);
      return SDL_FALSE;
   }

   /* Failed to get window manager information */
   return SDL_FALSE;
}

/*****************************************************************************/
/* SDL OpenGL/OpenGL ES functions                                            */
/*****************************************************************************/
int qnxgf_gl_loadlibrary(_THIS, const char* path)
{
   #if defined(SDL_VIDEO_OPENGL_ES)
      /* Check if OpenGL ES library is specified for GF driver */
      if (path==NULL)
      {
         path=SDL_getenv("SDL_OPENGL_LIBRARY");
         if (path==NULL)
         {
            path=SDL_getenv("SDL_OPENGLES_LIBRARY");
         }
      }

      /* Check if default library loading requested */
      if (path==NULL)
      {
         /* Already linked with GF library which provides egl* subset of  */
         /* functions, use Common profile of OpenGL ES library by default */
         path="/usr/lib/libGLES_CM.so.1";
      }

      /* Load dynamic library */
      _this->gl_config.dll_handle=SDL_LoadObject(path);
      if (!_this->gl_config.dll_handle)
      {
         /* Failed to load new GL ES library */
         SDL_SetError("GF: Failed to locate OpenGL ES library");
         return -1;
      }

      /* Store OpenGL ES library path and name */
      SDL_strlcpy(_this->gl_config.driver_path, path, SDL_arraysize(_this->gl_config.driver_path));

      /* New OpenGL ES library is loaded */
      return 0;
   #else
      SDL_SetError("GF: OpenGL ES support is not compiled in");
      return -1;
   #endif /* SDL_VIDEO_OPENGL_ES */
}

void* qnxgf_gl_getprocaddres(_THIS, const char* proc)
{
   #if defined(SDL_VIDEO_OPENGL_ES)
      void* function_address;

      /* Try to get function address through the egl interface */
      function_address=eglGetProcAddress(proc);
      if (function_address!=NULL)
      {
         return function_address;
      }

      /* Then try to get function in the OpenGL ES library */
      if (_this->gl_config.dll_handle)
      {
         function_address=SDL_LoadFunction(_this->gl_config.dll_handle, proc);
         if (function_address!=NULL)
         {
            return function_address;
         }
      }

      /* Add emulated OpenGL ES 1.1 functions */
      if (SDL_strcmp(proc, "glTexParameteri")==0)
      {
         return glTexParameteri;
      }
      if (SDL_strcmp(proc, "glTexParameteriv")==0)
      {
         return glTexParameteriv;
      }
      if (SDL_strcmp(proc, "glColor4ub")==0)
      {
         return glColor4ub;
      }

      /* Failed to get GL ES function address pointer */
      SDL_SetError("GF: Cannot locate OpenGL ES function name");
      return NULL;
   #else
      SDL_SetError("GF: OpenGL ES support is not compiled in");
      return NULL;
   #endif /* SDL_VIDEO_OPENGL_ES */
}

void qnxgf_gl_unloadlibrary(_THIS)
{
   #if defined(SDL_VIDEO_OPENGL_ES)
      /* Unload OpenGL ES library */
      if (_this->gl_config.dll_handle)
      {
         SDL_UnloadObject(_this->gl_config.dll_handle);
         _this->gl_config.dll_handle=NULL;
      }
   #else
      SDL_SetError("GF: OpenGL ES support is not compiled in");
      return;
   #endif /* SDL_VIDEO_OPENGL_ES */
}

SDL_GLContext qnxgf_gl_createcontext(_THIS, SDL_Window* window)
{
   #if defined(SDL_VIDEO_OPENGL_ES)
      SDL_VideoData*   gfdata=(SDL_VideoData*)_this->driverdata;
      SDL_WindowData*  wdata=(SDL_WindowData*)window->driverdata;
      SDL_DisplayData* didata=(SDL_DisplayData*)SDL_CurrentDisplay.driverdata;
      EGLBoolean       status;
      int32_t          gfstatus;
      EGLint           configs;
      uint32_t         surfaces;
      uint32_t         attr_pos;
      EGLint           attr_value;
      EGLint           cit;

      /* Choose buffeingr scheme */
      if (!_this->gl_config.double_buffer)
      {
         surfaces=1;
      }
      else
      {
         surfaces=2;
      }

      /* If driver has no support of video memory allocation, then */
      /* disable double buffering, use single buffer present copy  */
      if ((didata->caps & SDL_GF_VIDEOMEMORY)!=SDL_GF_VIDEOMEMORY)
      {
         surfaces=1;
      }

      /* Free main surface */
      if (didata->surface[0]!=NULL)
      {
         gf_surface_free(didata->surface[0]);
         didata->surface[0]=NULL;
      }

      /* Free back surface */
      if (didata->surface[1]!=NULL)
      {
         gf_surface_free(didata->surface[1]);
         didata->surface[1]=NULL;
      }

      /* Free second back surface */
      if (didata->surface[2]!=NULL)
      {
         gf_surface_free(didata->surface[2]);
         didata->surface[2]=NULL;
      }

      /* Detach layer before switch to new graphics mode */
      if (didata->layer_attached==SDL_TRUE)
      {
         /* Disable layer if hardware supports this */
         gf_layer_disable(didata->layer);

         /* Detach from layer, free it for others */
         gf_layer_detach(didata->layer);

         /* Mark it as detached */
         didata->layer_attached=SDL_FALSE;
      }

      /* Attach to main display layer */
      gfstatus=gf_layer_attach(&didata->layer, didata->display, didata->display_info.main_layer_index, 0);
      if (gfstatus!=GF_ERR_OK)
      {
         SDL_SetError("GF: Couldn't attach to main layer, it could be busy");

         /* Failed to attach to main displayable layer */
         return NULL;
      }

      /* Mark main display layer is attached */
      didata->layer_attached=SDL_TRUE;

      /* Set layer source and destination viewport */
      gf_layer_set_src_viewport(didata->layer, 0, 0, didata->current_mode.w-1, didata->current_mode.h-1);
      gf_layer_set_dst_viewport(didata->layer, 0, 0, didata->current_mode.w-1, didata->current_mode.h-1);

      /* Create main visible on display surface */
      gfstatus=gf_surface_create_layer(&didata->surface[0], &didata->layer, 1, 0,
               didata->current_mode.w, didata->current_mode.h, qnxgf_sdl_to_gf_pixelformat(didata->current_mode.format),
               NULL, GF_SURFACE_CREATE_2D_ACCESSIBLE | GF_SURFACE_CREATE_3D_ACCESSIBLE |
               GF_SURFACE_CREATE_SHAREABLE);
      if (gfstatus!=GF_ERR_OK)
      {
         gf_layer_disable(didata->layer);
         gf_layer_detach(didata->layer);
         didata->layer_attached=SDL_FALSE;
         SDL_SetError("GF: Can't create main layer surface at glctx (%d)\n", gfstatus);
         return NULL;
      }

      /* Set just created surface as main visible on the layer */
//      gf_layer_set_surfaces(didata->layer, &didata->surface[0], 1);

      if (surfaces>1)
      {
         /* Create back display surface */
         gfstatus=gf_surface_create_layer(&didata->surface[1], &didata->layer, 1, 0,
                  didata->current_mode.w, didata->current_mode.h, qnxgf_sdl_to_gf_pixelformat(didata->current_mode.format),
                  NULL, GF_SURFACE_CREATE_2D_ACCESSIBLE | GF_SURFACE_CREATE_3D_ACCESSIBLE |
                  GF_SURFACE_CREATE_SHAREABLE);
         if (gfstatus!=GF_ERR_OK)
         {
            gf_surface_free(didata->surface[0]);
            gf_layer_disable(didata->layer);
            gf_layer_detach(didata->layer);
            didata->layer_attached=SDL_FALSE;
            SDL_SetError("GF: Can't create main layer surface at glctx (%d)\n", gfstatus);
            return NULL;
         }
      }

      /* Update layer parameters */
      gfstatus=gf_layer_update(didata->layer, GF_LAYER_UPDATE_NO_WAIT_IDLE);
      if (gfstatus!=GF_ERR_OK)
      {
         /* Free main and back surfaces */
         gf_surface_free(didata->surface[1]);
         didata->surface[1]=NULL;
         gf_surface_free(didata->surface[0]);
         didata->surface[0]=NULL;

         /* Detach layer */
         gf_layer_disable(didata->layer);
         gf_layer_detach(didata->layer);
         didata->layer_attached=SDL_FALSE;
         SDL_SetError("GF: Can't update layer parameters\n");
         return NULL;
      }

      /* Enable layer in case if hardware supports layer enable/disable */
      gf_layer_enable(didata->layer);

      /* Prepare attributes list to pass them to OpenGL ES */
      attr_pos=0;
      wdata->gles_attributes[attr_pos++]=EGL_NATIVE_VISUAL_ID;
      wdata->gles_attributes[attr_pos++]=qnxgf_sdl_to_gf_pixelformat(didata->current_mode.format);
      wdata->gles_attributes[attr_pos++]=EGL_RED_SIZE;
      wdata->gles_attributes[attr_pos++]=_this->gl_config.red_size;
      wdata->gles_attributes[attr_pos++]=EGL_GREEN_SIZE;
      wdata->gles_attributes[attr_pos++]=_this->gl_config.green_size;
      wdata->gles_attributes[attr_pos++]=EGL_BLUE_SIZE;
      wdata->gles_attributes[attr_pos++]=_this->gl_config.blue_size;
      wdata->gles_attributes[attr_pos++]=EGL_ALPHA_SIZE;
      if (_this->gl_config.alpha_size)
      {
         wdata->gles_attributes[attr_pos++]=_this->gl_config.alpha_size;
      }
      else
      {
         wdata->gles_attributes[attr_pos++]=EGL_DONT_CARE;
      }
      wdata->gles_attributes[attr_pos++]=EGL_DEPTH_SIZE;
      wdata->gles_attributes[attr_pos++]=_this->gl_config.depth_size;
      if (_this->gl_config.buffer_size)
      {
         wdata->gles_attributes[attr_pos++]=EGL_BUFFER_SIZE;
         wdata->gles_attributes[attr_pos++]=_this->gl_config.buffer_size;
      }
      if (_this->gl_config.stencil_size)
      {
         wdata->gles_attributes[attr_pos++]=EGL_STENCIL_SIZE;
         wdata->gles_attributes[attr_pos++]=_this->gl_config.buffer_size;
      }

      /* Set number of samples in multisampling */
      if (_this->gl_config.multisamplesamples)
      {
         wdata->gles_attributes[attr_pos++]=EGL_SAMPLES;
         wdata->gles_attributes[attr_pos++]=_this->gl_config.multisamplesamples;
      }

      /* Multisample buffers, OpenGL ES 1.0 spec defines 0 or 1 buffer */
      if (_this->gl_config.multisamplebuffers)
      {
         wdata->gles_attributes[attr_pos++]=EGL_SAMPLE_BUFFERS;
         wdata->gles_attributes[attr_pos++]=_this->gl_config.multisamplebuffers;
      }

      /* Finish attributes list */
      wdata->gles_attributes[attr_pos]=EGL_NONE;

      /* Request first suitable framebuffer configuration */
      status=eglChooseConfig(gfdata->egldisplay, wdata->gles_attributes,
                             wdata->gles_configs, SDL_VIDEO_GF_OPENGLES_CONFS, &configs);
      if (status!=EGL_TRUE)
      {
         SDL_SetError("GF: Can't find closest configuration for OpenGL ES");
         return NULL;
      }

      /* Check if nothing has been found, try "don't care" settings */
      if (configs==0)
      {
         int32_t it;
         int32_t jt;
         GLint   depthbits[4]={32, 24, 16, EGL_DONT_CARE};

         for (it=0; it<4; it++)
         {
            for (jt=16; jt>=0; jt--)
            {
               /* Don't care about color buffer bits, use what exist */
               /* Replace previous data set with EGL_DONT_CARE       */
               attr_pos=0;
               wdata->gles_attributes[attr_pos++]=EGL_NATIVE_VISUAL_ID;
               wdata->gles_attributes[attr_pos++]=qnxgf_sdl_to_gf_pixelformat(didata->current_mode.format);
               wdata->gles_attributes[attr_pos++]=EGL_RED_SIZE;
               wdata->gles_attributes[attr_pos++]=EGL_DONT_CARE;
               wdata->gles_attributes[attr_pos++]=EGL_GREEN_SIZE;
               wdata->gles_attributes[attr_pos++]=EGL_DONT_CARE;
               wdata->gles_attributes[attr_pos++]=EGL_BLUE_SIZE;
               wdata->gles_attributes[attr_pos++]=EGL_DONT_CARE;
               wdata->gles_attributes[attr_pos++]=EGL_ALPHA_SIZE;
               wdata->gles_attributes[attr_pos++]=EGL_DONT_CARE;
               wdata->gles_attributes[attr_pos++]=EGL_BUFFER_SIZE;
               wdata->gles_attributes[attr_pos++]=EGL_DONT_CARE;

               /* Try to find requested or smallest depth */
               if (_this->gl_config.depth_size)
               {
                  wdata->gles_attributes[attr_pos++]=EGL_DEPTH_SIZE;
                  wdata->gles_attributes[attr_pos++]=depthbits[it];
               }
               else
               {
                  wdata->gles_attributes[attr_pos++]=EGL_DEPTH_SIZE;
                  wdata->gles_attributes[attr_pos++]=EGL_DONT_CARE;
               }

               if (_this->gl_config.stencil_size)
               {
                  wdata->gles_attributes[attr_pos++]=EGL_STENCIL_SIZE;
                  wdata->gles_attributes[attr_pos++]=jt;
               }
               else
               {
                  wdata->gles_attributes[attr_pos++]=EGL_STENCIL_SIZE;
                  wdata->gles_attributes[attr_pos++]=EGL_DONT_CARE;

                  /* exit from stencil loop */
                  jt=0;
               }

               /* Don't care about antialiasing */
               wdata->gles_attributes[attr_pos++]=EGL_SAMPLES;
               wdata->gles_attributes[attr_pos++]=EGL_DONT_CARE;
               wdata->gles_attributes[attr_pos++]=EGL_SAMPLE_BUFFERS;
               wdata->gles_attributes[attr_pos++]=EGL_DONT_CARE;
               wdata->gles_attributes[attr_pos]=EGL_NONE;

               /* Request first suitable framebuffer configuration */
               status=eglChooseConfig(gfdata->egldisplay, wdata->gles_attributes,
                                      wdata->gles_configs, SDL_VIDEO_GF_OPENGLES_CONFS, &configs);
               if (status!=EGL_TRUE)
               {
                  SDL_SetError("Photon: Can't find closest configuration for OpenGL ES");
                  return NULL;
               }
               if (configs!=0)
               {
                  break;
               }
            }
            if (configs!=0)
            {
               break;
            }
         }

         /* No available configs */
         if (configs==0)
         {
            SDL_SetError("Photon: Can't find any configuration for OpenGL ES");
            return NULL;
         }
      }

      /* Initialize config index */
      wdata->gles_config=0;

      /* Now check each configuration to find out the best */
      for (cit=0; cit<configs; cit++)
      {
         uint32_t stencil_found;
         uint32_t depth_found;

         stencil_found=0;
         depth_found=0;

         if (_this->gl_config.stencil_size)
         {
            status=eglGetConfigAttrib(gfdata->egldisplay, wdata->gles_configs[cit], EGL_STENCIL_SIZE, &attr_value);
            if (status==EGL_TRUE)
            {
               if (attr_value!=0)
               {
                  stencil_found=1;
               }
            }
         }
         else
         {
            stencil_found=1;
         }

         if (_this->gl_config.depth_size)
         {
            status=eglGetConfigAttrib(gfdata->egldisplay, wdata->gles_configs[cit], EGL_DEPTH_SIZE, &attr_value);
            if (status==EGL_TRUE)
            {
               if (attr_value!=0)
               {
                  depth_found=1;
               }
            }
         }
         else
         {
            depth_found=1;
         }

         /* Exit from loop if found appropriate configuration */
         if ((depth_found!=0) && (stencil_found!=0))
         {
            break;
         }
      }

      /* If best could not be found, use first */
      if (cit==configs)
      {
         cit=0;
      }
      wdata->gles_config=cit;

      /* Create OpenGL ES context */
      wdata->gles_context=eglCreateContext(gfdata->egldisplay, wdata->gles_configs[wdata->gles_config], EGL_NO_CONTEXT, NULL);
      if (wdata->gles_context==EGL_NO_CONTEXT)
      {
         SDL_SetError("GF: OpenGL ES context creation has been failed");
         return NULL;
      }

      /* Free any 3D target if it was created before */
      if (wdata->target_created==SDL_TRUE)
      {
         gf_3d_target_free(wdata->target);
         wdata->target_created==SDL_FALSE;
      }

      /* Create surface(s) target for OpenGL ES */
      gfstatus=gf_3d_target_create(&wdata->target, didata->layer, &didata->surface[0],
               surfaces, didata->current_mode.w, didata->current_mode.h,
               qnxgf_sdl_to_gf_pixelformat(didata->current_mode.format));
      if (gfstatus!=GF_ERR_OK)
      {
         /* Destroy just created context */
         eglDestroyContext(gfdata->egldisplay, wdata->gles_context);
         wdata->gles_context=EGL_NO_CONTEXT;

         /* Mark 3D target as unallocated */
         wdata->target_created=SDL_FALSE;
         SDL_SetError("GF: OpenGL ES target could not be created");
         return NULL;
      }
      else
      {
         wdata->target_created=SDL_TRUE;
      }

      /* Create target rendering surface on whole screen */
      wdata->gles_surface=eglCreateWindowSurface(gfdata->egldisplay, wdata->gles_configs[wdata->gles_config], wdata->target, NULL);
      if (wdata->gles_surface==EGL_NO_SURFACE)
      {
         /* Destroy 3d target */
         gf_3d_target_free(wdata->target);
         wdata->target_created=SDL_FALSE;

         /* Destroy OpenGL ES context */
         eglDestroyContext(gfdata->egldisplay, wdata->gles_context);
         wdata->gles_context=EGL_NO_CONTEXT;

         SDL_SetError("GF: OpenGL ES surface could not be created");
         return NULL;
      }

      /* Make just created context current */
      status=eglMakeCurrent(gfdata->egldisplay, wdata->gles_surface, wdata->gles_surface, wdata->gles_context);
      if (status!=EGL_TRUE)
      {
         /* Destroy OpenGL ES surface */
         eglDestroySurface(gfdata->egldisplay, wdata->gles_surface);

         /* Destroy 3d target */
         gf_3d_target_free(wdata->target);
         wdata->target_created=SDL_FALSE;

         /* Destroy OpenGL ES context */
         eglDestroyContext(gfdata->egldisplay, wdata->gles_context);
         wdata->gles_context=EGL_NO_CONTEXT;

         /* Failed to set current GL ES context */
         SDL_SetError("GF: Can't set OpenGL ES context on creation");
         return NULL;
      }

      /* Setup into SDL internals state of OpenGL ES:  */
      /* it is accelerated or not                      */
      if ((didata->caps & SDL_GF_ACCELERATED_3D)==SDL_GF_ACCELERATED_3D)
      {
         _this->gl_config.accelerated=1;
      }
      else
      {
         _this->gl_config.accelerated=0;
      }

      /* Always clear stereo enable, since OpenGL ES do not supports stereo */
      _this->gl_config.stereo=0;

      /* Get back samples and samplebuffers configurations. Rest framebuffer */
      /* parameters could be obtained through the OpenGL ES API              */
      status=eglGetConfigAttrib(gfdata->egldisplay, wdata->gles_configs[wdata->gles_config], EGL_SAMPLES, &attr_value);
      if (status==EGL_TRUE)
      {
         _this->gl_config.multisamplesamples=attr_value;
      }
      status=eglGetConfigAttrib(gfdata->egldisplay, wdata->gles_configs[wdata->gles_config], EGL_SAMPLE_BUFFERS, &attr_value);
      if (status==EGL_TRUE)
      {
         _this->gl_config.multisamplebuffers=attr_value;
      }

      /* Get back stencil and depth buffer sizes */
      status=eglGetConfigAttrib(gfdata->egldisplay, wdata->gles_configs[wdata->gles_config], EGL_DEPTH_SIZE, &attr_value);
      if (status==EGL_TRUE)
      {
         _this->gl_config.depth_size=attr_value;
      }
      status=eglGetConfigAttrib(gfdata->egldisplay, wdata->gles_configs[wdata->gles_config], EGL_STENCIL_SIZE, &attr_value);
      if (status==EGL_TRUE)
      {
         _this->gl_config.stencil_size=attr_value;
      }

      /* Restore cursor if it was visible */
      if (didata->cursor_visible==SDL_TRUE)
      {
         gf_cursor_set(didata->display, 0, &didata->cursor);
         gf_cursor_enable(didata->display, 0);
      }

      /* GL ES context was successfully created */
      return wdata->gles_context;
   #else
      SDL_SetError("GF: OpenGL ES support is not compiled in");
      return NULL;
   #endif /* SDL_VIDEO_OPENGL_ES */
}

int qnxgf_gl_makecurrent(_THIS, SDL_Window* window, SDL_GLContext context)
{
   #if defined(SDL_VIDEO_OPENGL_ES)
      SDL_VideoData*   gfdata=(SDL_VideoData*)_this->driverdata;
      SDL_WindowData*  wdata;
      EGLBoolean status;

      if ((window==NULL) && (context==NULL))
      {
         status=eglMakeCurrent(gfdata->egldisplay, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
         if (status!=EGL_TRUE)
         {
            /* Failed to set current GL ES context */
            SDL_SetError("GF: Can't set OpenGL ES context");
            return -1;
         }
      }
      else
      {
         wdata=(SDL_WindowData*)window->driverdata;
         status=eglMakeCurrent(gfdata->egldisplay, wdata->gles_surface, wdata->gles_surface, wdata->gles_context);
         if (status!=EGL_TRUE)
         {
            /* Failed to set current GL ES context */
            SDL_SetError("GF: Can't set OpenGL ES context");
            return -1;
         }
      }

      return 0;
   #else
      SDL_SetError("GF: OpenGL ES support is not compiled in");
      return -1;
   #endif /* SDL_VIDEO_OPENGL_ES */
}

int qnxgf_gl_setswapinterval(_THIS, int interval)
{
   #if defined(SDL_VIDEO_OPENGL_ES)
      SDL_VideoData* gfdata=(SDL_VideoData*)_this->driverdata;
      EGLBoolean     status;

      /* Check if OpenGL ES connection has been initialized */
      if (gfdata->egldisplay!=EGL_NO_DISPLAY)
      {
         /* Set swap OpenGL ES interval */
         status=eglSwapInterval(gfdata->egldisplay, interval);
         if (status==EGL_TRUE)
         {
            /* Return success to upper level */
            gfdata->swapinterval=interval;
            return 0;
         }
      }

      /* Failed to set swap interval */
      SDL_SetError("GF: Cannot set swap interval");
      return -1;
   #else
      SDL_SetError("GF: OpenGL ES support is not compiled in");
      return -1;
   #endif /* SDL_VIDEO_OPENGL_ES */
}

int qnxgf_gl_getswapinterval(_THIS)
{
   #if defined(SDL_VIDEO_OPENGL_ES)
      SDL_VideoData* gfdata=(SDL_VideoData*)_this->driverdata;

      /* Return default swap interval value */
      return gfdata->swapinterval;
   #else
      SDL_SetError("GF: OpenGL ES support is not compiled in");
      return -1;
   #endif /* SDL_VIDEO_OPENGL_ES */
}

void qnxgf_gl_swapwindow(_THIS, SDL_Window* window)
{
   #if defined(SDL_VIDEO_OPENGL_ES)
      SDL_VideoData*   gfdata=(SDL_VideoData*)_this->driverdata;
      SDL_WindowData*  wdata=(SDL_WindowData*)window->driverdata;

      /* Finish all drawings */
      glFinish();

      /* Swap buffers */
      eglSwapBuffers(gfdata->egldisplay, wdata->gles_surface);
   #else
      SDL_SetError("GF: OpenGL ES support is not compiled in");
      return;
   #endif /* SDL_VIDEO_OPENGL_ES */
}

void qnxgf_gl_deletecontext(_THIS, SDL_GLContext context)
{
   #if defined(SDL_VIDEO_OPENGL_ES)
      SDL_VideoData* gfdata=(SDL_VideoData*)_this->driverdata;
      EGLBoolean     status;

      /* Check if OpenGL ES connection has been initialized */
      if (gfdata->egldisplay!=EGL_NO_DISPLAY)
      {
         if (context!=EGL_NO_CONTEXT)
         {
            status=eglDestroyContext(gfdata->egldisplay, context);
            if (status!=EGL_TRUE)
            {
               /* Error during OpenGL ES context destroying */
               SDL_SetError("GF: OpenGL ES context destroy error");
               return;
            }
         }
      }

      return;
   #else
      SDL_SetError("GF: OpenGL ES support is not compiled in");
      return;
   #endif /* SDL_VIDEO_OPENGL_ES */
}

/*****************************************************************************/
/* SDL Event handling function                                               */
/*****************************************************************************/
void qnxgf_pumpevents(_THIS)
{
}

/*****************************************************************************/
/* SDL screen saver related functions                                        */
/*****************************************************************************/
void qnxgf_suspendscreensaver(_THIS)
{
   /* There is no screensaver in pure console, it may exist when running */
   /* GF under Photon, but I do not know, how to disable screensaver     */
}

/* vi: set ts=4 sw=4 expandtab: */