| /* |
| Simple DirectMedia Layer |
| Copyright (C) 1997-2024 Sam Lantinga <slouken@libsdl.org> |
| |
| This software is provided 'as-is', without any express or implied |
| warranty. In no event will the authors be held liable for any damages |
| arising from the use of this software. |
| |
| Permission is granted to anyone to use this software for any purpose, |
| including commercial applications, and to alter it and redistribute it |
| freely, subject to the following restrictions: |
| |
| 1. The origin of this software must not be misrepresented; you must not |
| claim that you wrote the original software. If you use this software |
| in a product, an acknowledgment in the product documentation would be |
| appreciated but is not required. |
| 2. Altered source versions must be plainly marked as such, and must not be |
| misrepresented as being the original software. |
| 3. This notice may not be removed or altered from any source distribution. |
| */ |
| #include "SDL_internal.h" |
| |
| #ifdef SDL_VIDEO_DRIVER_DUMMY |
| |
| /* 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_sysvideo.h" |
| #include "../SDL_pixels_c.h" |
| #include "../../events/SDL_events_c.h" |
| #ifdef SDL_INPUT_LINUXEV |
| #include "../../core/linux/SDL_evdev.h" |
| #endif |
| |
| #include "SDL_nullvideo.h" |
| #include "SDL_nullevents_c.h" |
| #include "SDL_nullframebuffer_c.h" |
| |
| #define DUMMYVID_DRIVER_NAME "dummy" |
| #define DUMMYVID_DRIVER_EVDEV_NAME "evdev" |
| |
| /* Initialization/Query functions */ |
| static int DUMMY_VideoInit(SDL_VideoDevice *_this); |
| static void DUMMY_VideoQuit(SDL_VideoDevice *_this); |
| |
| static int DUMMY_SetWindowPosition(SDL_VideoDevice *_this, SDL_Window *window) |
| { |
| SDL_SendWindowEvent(window, SDL_EVENT_WINDOW_MOVED, window->floating.x, window->floating.y); |
| return 0; |
| } |
| |
| static void DUMMY_SetWindowSize(SDL_VideoDevice *_this, SDL_Window *window) |
| { |
| SDL_SendWindowEvent(window, SDL_EVENT_WINDOW_RESIZED, window->floating.w, window->floating.h); |
| } |
| |
| /* DUMMY driver bootstrap functions */ |
| |
| static int DUMMY_Available(const char *enable_hint) |
| { |
| const char *hint = SDL_GetHint(SDL_HINT_VIDEO_DRIVER); |
| if (hint) { |
| if (SDL_strcmp(hint, enable_hint) == 0) { |
| return 1; |
| } |
| } |
| return 0; |
| } |
| |
| static void DUMMY_DeleteDevice(SDL_VideoDevice *device) |
| { |
| SDL_free(device); |
| } |
| |
| static SDL_VideoDevice *DUMMY_InternalCreateDevice(const char *enable_hint) |
| { |
| SDL_VideoDevice *device; |
| |
| if (!DUMMY_Available(enable_hint)) { |
| return 0; |
| } |
| |
| /* Initialize all variables that we clean on shutdown */ |
| device = (SDL_VideoDevice *)SDL_calloc(1, sizeof(SDL_VideoDevice)); |
| if (!device) { |
| return 0; |
| } |
| device->is_dummy = SDL_TRUE; |
| |
| /* Set the function pointers */ |
| device->VideoInit = DUMMY_VideoInit; |
| device->VideoQuit = DUMMY_VideoQuit; |
| device->PumpEvents = DUMMY_PumpEvents; |
| device->SetWindowSize = DUMMY_SetWindowSize; |
| device->SetWindowPosition = DUMMY_SetWindowPosition; |
| device->CreateWindowFramebuffer = SDL_DUMMY_CreateWindowFramebuffer; |
| device->UpdateWindowFramebuffer = SDL_DUMMY_UpdateWindowFramebuffer; |
| device->DestroyWindowFramebuffer = SDL_DUMMY_DestroyWindowFramebuffer; |
| device->free = DUMMY_DeleteDevice; |
| |
| return device; |
| } |
| |
| static SDL_VideoDevice *DUMMY_CreateDevice(void) |
| { |
| return DUMMY_InternalCreateDevice(DUMMYVID_DRIVER_NAME); |
| } |
| |
| VideoBootStrap DUMMY_bootstrap = { |
| DUMMYVID_DRIVER_NAME, "SDL dummy video driver", |
| DUMMY_CreateDevice, |
| NULL /* no ShowMessageBox implementation */ |
| }; |
| |
| #ifdef SDL_INPUT_LINUXEV |
| |
| static void DUMMY_EVDEV_Poll(SDL_VideoDevice *_this) |
| { |
| (void)_this; |
| SDL_EVDEV_Poll(); |
| } |
| |
| static SDL_VideoDevice *DUMMY_EVDEV_CreateDevice(void) |
| { |
| SDL_VideoDevice *device = DUMMY_InternalCreateDevice(DUMMYVID_DRIVER_EVDEV_NAME); |
| if (device) { |
| device->PumpEvents = DUMMY_EVDEV_Poll; |
| } |
| return device; |
| } |
| |
| VideoBootStrap DUMMY_evdev_bootstrap = { |
| DUMMYVID_DRIVER_EVDEV_NAME, "SDL dummy video driver with evdev", |
| DUMMY_EVDEV_CreateDevice, |
| NULL /* no ShowMessageBox implementation */ |
| }; |
| |
| #endif /* SDL_INPUT_LINUXEV */ |
| |
| int DUMMY_VideoInit(SDL_VideoDevice *_this) |
| { |
| SDL_DisplayMode mode; |
| |
| /* Use a fake 32-bpp desktop mode */ |
| SDL_zero(mode); |
| mode.format = SDL_PIXELFORMAT_XRGB8888; |
| mode.w = 1024; |
| mode.h = 768; |
| if (SDL_AddBasicVideoDisplay(&mode) == 0) { |
| return -1; |
| } |
| |
| #ifdef SDL_INPUT_LINUXEV |
| SDL_EVDEV_Init(); |
| #endif |
| |
| /* We're done! */ |
| return 0; |
| } |
| |
| void DUMMY_VideoQuit(SDL_VideoDevice *_this) |
| { |
| #ifdef SDL_INPUT_LINUXEV |
| SDL_EVDEV_Quit(); |
| #endif |
| } |
| |
| #endif /* SDL_VIDEO_DRIVER_DUMMY */ |