cscg22-gearboy

CSCG 2022 Challenge 'Gearboy'
git clone https://git.sinitax.com/sinitax/cscg22-gearboy
Log | Files | Refs | sfeed.txt

SDL_nullvideo.c (4177B)

      1/*
      2  Simple DirectMedia Layer
      3  Copyright (C) 1997-2014 Sam Lantinga <slouken@libsdl.org>
      4
      5  This software is provided 'as-is', without any express or implied
      6  warranty.  In no event will the authors be held liable for any damages
      7  arising from the use of this software.
      8
      9  Permission is granted to anyone to use this software for any purpose,
     10  including commercial applications, and to alter it and redistribute it
     11  freely, subject to the following restrictions:
     12
     13  1. The origin of this software must not be misrepresented; you must not
     14     claim that you wrote the original software. If you use this software
     15     in a product, an acknowledgment in the product documentation would be
     16     appreciated but is not required.
     17  2. Altered source versions must be plainly marked as such, and must not be
     18     misrepresented as being the original software.
     19  3. This notice may not be removed or altered from any source distribution.
     20*/
     21#include "../../SDL_internal.h"
     22
     23#if SDL_VIDEO_DRIVER_DUMMY
     24
     25/* Dummy SDL video driver implementation; this is just enough to make an
     26 *  SDL-based application THINK it's got a working video driver, for
     27 *  applications that call SDL_Init(SDL_INIT_VIDEO) when they don't need it,
     28 *  and also for use as a collection of stubs when porting SDL to a new
     29 *  platform for which you haven't yet written a valid video driver.
     30 *
     31 * This is also a great way to determine bottlenecks: if you think that SDL
     32 *  is a performance problem for a given platform, enable this driver, and
     33 *  then see if your application runs faster without video overhead.
     34 *
     35 * Initial work by Ryan C. Gordon (icculus@icculus.org). A good portion
     36 *  of this was cut-and-pasted from Stephane Peter's work in the AAlib
     37 *  SDL video driver.  Renamed to "DUMMY" by Sam Lantinga.
     38 */
     39
     40#include "SDL_video.h"
     41#include "SDL_mouse.h"
     42#include "../SDL_sysvideo.h"
     43#include "../SDL_pixels_c.h"
     44#include "../../events/SDL_events_c.h"
     45
     46#include "SDL_nullvideo.h"
     47#include "SDL_nullevents_c.h"
     48#include "SDL_nullframebuffer_c.h"
     49
     50#define DUMMYVID_DRIVER_NAME "dummy"
     51
     52/* Initialization/Query functions */
     53static int DUMMY_VideoInit(_THIS);
     54static int DUMMY_SetDisplayMode(_THIS, SDL_VideoDisplay * display, SDL_DisplayMode * mode);
     55static void DUMMY_VideoQuit(_THIS);
     56
     57/* DUMMY driver bootstrap functions */
     58
     59static int
     60DUMMY_Available(void)
     61{
     62    const char *envr = SDL_getenv("SDL_VIDEODRIVER");
     63    if ((envr) && (SDL_strcmp(envr, DUMMYVID_DRIVER_NAME) == 0)) {
     64        return (1);
     65    }
     66
     67    return (0);
     68}
     69
     70static void
     71DUMMY_DeleteDevice(SDL_VideoDevice * device)
     72{
     73    SDL_free(device);
     74}
     75
     76static SDL_VideoDevice *
     77DUMMY_CreateDevice(int devindex)
     78{
     79    SDL_VideoDevice *device;
     80
     81    /* Initialize all variables that we clean on shutdown */
     82    device = (SDL_VideoDevice *) SDL_calloc(1, sizeof(SDL_VideoDevice));
     83    if (!device) {
     84        SDL_OutOfMemory();
     85        SDL_free(device);
     86        return (0);
     87    }
     88
     89    /* Set the function pointers */
     90    device->VideoInit = DUMMY_VideoInit;
     91    device->VideoQuit = DUMMY_VideoQuit;
     92    device->SetDisplayMode = DUMMY_SetDisplayMode;
     93    device->PumpEvents = DUMMY_PumpEvents;
     94    device->CreateWindowFramebuffer = SDL_DUMMY_CreateWindowFramebuffer;
     95    device->UpdateWindowFramebuffer = SDL_DUMMY_UpdateWindowFramebuffer;
     96    device->DestroyWindowFramebuffer = SDL_DUMMY_DestroyWindowFramebuffer;
     97
     98    device->free = DUMMY_DeleteDevice;
     99
    100    return device;
    101}
    102
    103VideoBootStrap DUMMY_bootstrap = {
    104    DUMMYVID_DRIVER_NAME, "SDL dummy video driver",
    105    DUMMY_Available, DUMMY_CreateDevice
    106};
    107
    108
    109int
    110DUMMY_VideoInit(_THIS)
    111{
    112    SDL_DisplayMode mode;
    113
    114    /* Use a fake 32-bpp desktop mode */
    115    mode.format = SDL_PIXELFORMAT_RGB888;
    116    mode.w = 1024;
    117    mode.h = 768;
    118    mode.refresh_rate = 0;
    119    mode.driverdata = NULL;
    120    if (SDL_AddBasicVideoDisplay(&mode) < 0) {
    121        return -1;
    122    }
    123
    124    SDL_zero(mode);
    125    SDL_AddDisplayMode(&_this->displays[0], &mode);
    126
    127    /* We're done! */
    128    return 0;
    129}
    130
    131static int
    132DUMMY_SetDisplayMode(_THIS, SDL_VideoDisplay * display, SDL_DisplayMode * mode)
    133{
    134    return 0;
    135}
    136
    137void
    138DUMMY_VideoQuit(_THIS)
    139{
    140}
    141
    142#endif /* SDL_VIDEO_DRIVER_DUMMY */
    143
    144/* vi: set ts=4 sw=4 expandtab: */