/*

    SDL - Simple DirectMedia Layer

    Copyright (C) 1997-2006 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

*/

#include "SDL_config.h"

/* Dummy SDL video driver implementation; this is just enough to make an

 *  SDL-based application THINK it's got a working video driver, for

 *  applications that call SDL_Init(SDL_INIT_VIDEO) when they don't need it,

 *  and also for use as a collection of stubs when porting SDL to a new

 *  platform for which you haven't yet written a valid video driver.

 *

 * This is also a great way to determine bottlenecks: if you think that SDL

 *  is a performance problem for a given platform, enable this driver, and

 *  then see if your application runs faster without video overhead.

 *

 * Initial work by Ryan C. Gordon (icculus@icculus.org). A good portion

 *  of this was cut-and-pasted from Stephane Peter's work in the AAlib

 *  SDL video driver.  Renamed to "DUMMY" by Sam Lantinga.

 */

#include "SDL_video.h"

#include "SDL_mouse.h"

#include "../SDL_sysvideo.h"

#include "../SDL_pixels_c.h"

#include "../../events/SDL_events_c.h"

#include "SDL_nullvideo.h"

#include "SDL_nullevents_c.h"

#include "SDL_nullrender_c.h"

#define DUMMYVID_DRIVER_NAME "dummy"

/* Initialization/Query functions */

static int DUMMY_VideoInit(_THIS);

static int DUMMY_SetDisplayMode(_THIS, SDL_DisplayMode * mode);

static void DUMMY_VideoQuit(_THIS);

/* DUMMY driver bootstrap functions */

static int

DUMMY_Available(void)

{

    const char *envr = SDL_getenv("SDL_VIDEODRIVER");

    if ((envr) && (SDL_strcmp(envr, DUMMYVID_DRIVER_NAME) == 0)) {

        return (1);

    }

    return (0);

}

static void

DUMMY_DeleteDevice(SDL_VideoDevice * device)

{

    SDL_free(device);

}

static SDL_VideoDevice *

DUMMY_CreateDevice(int devindex)

{

    SDL_VideoDevice *device;

    /* Initialize all variables that we clean on shutdown */

    device = (SDL_VideoDevice *) SDL_calloc(1, sizeof(SDL_VideoDevice));

    if (!device) {

        SDL_OutOfMemory();

        if (device) {

            SDL_free(device);

        }

        return (0);

    }

    /* Set the function pointers */

    device->VideoInit = DUMMY_VideoInit;

    device->SetDisplayMode = DUMMY_SetDisplayMode;

    device->VideoQuit = DUMMY_VideoQuit;

    device->PumpEvents = DUMMY_PumpEvents;

    device->free = DUMMY_DeleteDevice;

    return device;

}

VideoBootStrap DUMMY_bootstrap = {

    DUMMYVID_DRIVER_NAME, "SDL dummy video driver",

    DUMMY_Available, DUMMY_CreateDevice

};

int

DUMMY_VideoInit(_THIS)

{

    SDL_DisplayMode mode;

    SDL_AddRenderDriver(0, &SDL_DUMMY_RenderDriver);

    SDL_zero(mode);

    SDL_AddDisplayMode(0, &mode);

    /* We're done! */

    return 0;

}

static int

DUMMY_SetDisplayMode(_THIS, SDL_DisplayMode * mode)

{

    return 0;

}

void

DUMMY_VideoQuit(_THIS)

{

}

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