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SDL_nullvideo.c
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/*
SDL - Simple DirectMedia Layer
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Copyright (C) 1997-2009 Sam Lantinga
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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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
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Lesser General Public License for more details.
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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
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Sam Lantinga
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slouken@libsdl.org
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#include "SDL_config.h"
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/* 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.
*
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* Initial work by Ryan C. Gordon (icculus@icculus.org). A good portion
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* 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"
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#include "../SDL_sysvideo.h"
#include "../SDL_pixels_c.h"
#include "../../events/SDL_events_c.h"
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#include "SDL_nullvideo.h"
#include "SDL_nullevents_c.h"
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#include "SDL_nullrender_c.h"
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#define DUMMYVID_DRIVER_NAME "dummy"
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/* Initialization/Query functions */
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static int DUMMY_VideoInit(_THIS);
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static int DUMMY_SetDisplayMode(_THIS, SDL_VideoDisplay * display, SDL_DisplayMode * mode);
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static void DUMMY_VideoQuit(_THIS);
/* DUMMY driver bootstrap functions */
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static int
DUMMY_Available(void)
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const char *envr = SDL_getenv("SDL_VIDEODRIVER");
if ((envr) && (SDL_strcmp(envr, DUMMYVID_DRIVER_NAME) == 0)) {
return (1);
}
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static void
DUMMY_DeleteDevice(SDL_VideoDevice * device)
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SDL_free(device);
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static SDL_VideoDevice *
DUMMY_CreateDevice(int devindex)
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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;
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device->SetDisplayMode = DUMMY_SetDisplayMode;
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device->PumpEvents = DUMMY_PumpEvents;
device->free = DUMMY_DeleteDevice;
return device;
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}
VideoBootStrap DUMMY_bootstrap = {
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DUMMYVID_DRIVER_NAME, "SDL dummy video driver",
DUMMY_Available, DUMMY_CreateDevice
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};
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int
DUMMY_VideoInit(_THIS)
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SDL_DisplayMode mode;
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/* Use a fake 32-bpp desktop mode */
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mode.format = SDL_PIXELFORMAT_RGB888;
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mode.w = 1024;
mode.h = 768;
mode.refresh_rate = 0;
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mode.driverdata = NULL;
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if (SDL_AddBasicVideoDisplay(&mode) < 0) {
return -1;
}
SDL_AddRenderDriver(&_this->displays[0], &SDL_DUMMY_RenderDriver);
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SDL_zero(mode);
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SDL_AddDisplayMode(&_this->displays[0], &mode);
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/* We're done! */
return 0;
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DUMMY_SetDisplayMode(_THIS, SDL_VideoDisplay * display, SDL_DisplayMode * mode)
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void
DUMMY_VideoQuit(_THIS)
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{
}
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/* vi: set ts=4 sw=4 expandtab: */