view src/video/dummy/SDL_nullvideo.c @ 2349:0381047f2210 gsoc2008_iphone

The class SDL_uikitappdelegate acts as the UIApplicationDelegate for an iPhone SDL project. This class is reponsible for application control flow, including initial setup of working directory, forwarding command line arguments to the user's main function, and handling application termination.
author Holmes Futrell <hfutrell@umail.ucsb.edu>
date Thu, 17 Jul 2008 22:29:37 +0000
parents b252359547ed
children c3e7c0698cbb 99210400e8b9
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/*
    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->VideoQuit = DUMMY_VideoQuit;
    device->SetDisplayMode = DUMMY_SetDisplayMode;
    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;

    /* Use a fake 32-bpp desktop mode */
    mode.format = SDL_PIXELFORMAT_RGB888;
    mode.w = 1024;
    mode.h = 768;
    mode.refresh_rate = 0;
    mode.driverdata = NULL;
    SDL_AddBasicVideoDisplay(&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)
{
}

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