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SDL_nullvideo.c
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/*
SDL - Simple DirectMedia Layer
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Copyright (C) 1997-2006 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"
#include "SDL_nullmouse_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);
static int DUMMY_SetDisplayMode (_THIS, const SDL_DisplayMode * mode);
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static void DUMMY_CreateWindowSurface (_THIS, SDL_Window * window,
Uint32 flags);
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static void DUMMY_VideoQuit (_THIS);
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/* 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->hidden);
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_malloc (sizeof (SDL_VideoDevice));
if (device) {
SDL_memset (device, 0, (sizeof *device));
device->hidden = (struct SDL_PrivateVideoData *)
SDL_malloc ((sizeof *device->hidden));
}
if ((device == NULL) || (device->hidden == NULL)) {
SDL_OutOfMemory ();
if (device) {
SDL_free (device);
}
return (0);
}
SDL_memset (device->hidden, 0, (sizeof *device->hidden));
/* Set the function pointers */
device->VideoInit = DUMMY_VideoInit;
device->SetDisplayMode = DUMMY_SetDisplayMode;
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device->CreateWindowSurface = DUMMY_CreateWindowSurface;
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device->VideoQuit = DUMMY_VideoQuit;
device->InitOSKeymap = DUMMY_InitOSKeymap;
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_AddBasicVideoDisplay (NULL);
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/* We're done! */
return 0;
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static int
DUMMY_SetDisplayMode (_THIS, const SDL_DisplayMode * mode)
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static void
DUMMY_CreateWindowSurface (_THIS, SDL_Window * window, Uint32 flags)
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int bpp;
Uint32 Rmask, Gmask, Bmask, Amask;
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SDL_PixelFormatEnumToMasks (SDL_GetCurrentDisplayMode ()->format, &bpp,
&Rmask, &Gmask, &Bmask, &Amask);
window->surface =
SDL_CreateRGBSurface (flags, window->w, window->h, bpp, Rmask, Gmask,
Bmask, Amask);
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}
/* Note: If we are terminated, this could be called in the middle of
another SDL video routine -- notably UpdateRects.
*/
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void
DUMMY_VideoQuit (_THIS)
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{
}
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/* vi: set ts=4 sw=4 expandtab: */