/*
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Simple DirectMedia Layer
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Copyright (C) 1997-2020 Sam Lantinga <slouken@libsdl.org>
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This software is provided 'as-is', without any express or implied
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warranty. In no event will the authors be held liable for any damages
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arising from the use of this software.
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Permission is granted to anyone to use this software for any purpose,
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including commercial applications, and to alter it and redistribute it
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freely, subject to the following restrictions:
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1. The origin of this software must not be misrepresented; you must not
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claim that you wrote the original software. If you use this software
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in a product, an acknowledgment in the product documentation would be
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appreciated but is not required.
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2. Altered source versions must be plainly marked as such, and must not be
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misrepresented as being the original software.
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3. This notice may not be removed or altered from any source distribution.
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*/
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#include "../../SDL_internal.h"
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#if SDL_VIDEO_DRIVER_OFFSCREEN
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/* Offscreen video driver is similar to dummy driver, however its purpose
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* is enabling applications to use some of the SDL video functionality
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* (notably context creation) while not requiring a display output.
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*
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* An example would be running a graphical program on a headless box
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* for automated testing.
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*/
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#include "SDL_video.h"
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#include "SDL_mouse.h"
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#include "../SDL_sysvideo.h"
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#include "../SDL_pixels_c.h"
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#include "../../events/SDL_events_c.h"
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#include "SDL_offscreenvideo.h"
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#include "SDL_offscreenevents_c.h"
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#include "SDL_offscreenframebuffer_c.h"
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#include "SDL_offscreenopengl.h"
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#define OFFSCREENVID_DRIVER_NAME "offscreen"
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/* Initialization/Query functions */
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static int OFFSCREEN_VideoInit(_THIS);
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static int OFFSCREEN_SetDisplayMode(_THIS, SDL_VideoDisplay * display, SDL_DisplayMode * mode);
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static void OFFSCREEN_VideoQuit(_THIS);
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/* OFFSCREEN driver bootstrap functions */
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static void
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OFFSCREEN_DeleteDevice(SDL_VideoDevice * device)
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{
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SDL_free(device);
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}
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static SDL_VideoDevice *
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OFFSCREEN_CreateDevice(int devindex)
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{
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SDL_VideoDevice *device;
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/* Initialize all variables that we clean on shutdown */
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device = (SDL_VideoDevice *) SDL_calloc(1, sizeof(SDL_VideoDevice));
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if (!device) {
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SDL_OutOfMemory();
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return (0);
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}
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/* General video */
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device->VideoInit = OFFSCREEN_VideoInit;
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device->VideoQuit = OFFSCREEN_VideoQuit;
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device->SetDisplayMode = OFFSCREEN_SetDisplayMode;
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device->PumpEvents = OFFSCREEN_PumpEvents;
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device->CreateWindowFramebuffer = SDL_OFFSCREEN_CreateWindowFramebuffer;
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device->UpdateWindowFramebuffer = SDL_OFFSCREEN_UpdateWindowFramebuffer;
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device->DestroyWindowFramebuffer = SDL_OFFSCREEN_DestroyWindowFramebuffer;
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device->free = OFFSCREEN_DeleteDevice;
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/* GL context */
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device->GL_SwapWindow = OFFSCREEN_GL_SwapWindow;
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device->GL_MakeCurrent = OFFSCREEN_GL_MakeCurrent;
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device->GL_CreateContext = OFFSCREEN_GL_CreateContext;
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device->GL_DeleteContext = OFFSCREEN_GL_DeleteContext;
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device->GL_LoadLibrary = OFFSCREEN_GL_LoadLibrary;
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device->GL_UnloadLibrary = OFFSCREEN_GL_UnloadLibrary;
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device->GL_GetProcAddress = OFFSCREEN_GL_GetProcAddress;
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device->GL_GetSwapInterval = OFFSCREEN_GL_GetSwapInterval;
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device->GL_SetSwapInterval = OFFSCREEN_GL_SetSwapInterval;
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/* "Window" */
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device->CreateSDLWindow = OFFSCREEN_CreateWindow;
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device->DestroyWindow = OFFSCREEN_DestroyWindow;
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return device;
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}
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VideoBootStrap OFFSCREEN_bootstrap = {
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OFFSCREENVID_DRIVER_NAME, "SDL offscreen video driver",
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OFFSCREEN_CreateDevice
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};
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int
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OFFSCREEN_VideoInit(_THIS)
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{
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SDL_DisplayMode mode;
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SDL_Mouse *mouse = NULL;
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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;
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mode.h = 768;
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mode.refresh_rate = 0;
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mode.driverdata = NULL;
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if (SDL_AddBasicVideoDisplay(&mode) < 0) {
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return -1;
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}
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SDL_zero(mode);
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SDL_AddDisplayMode(&_this->displays[0], &mode);
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/* We're done! */
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return 0;
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}
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static int
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OFFSCREEN_SetDisplayMode(_THIS, SDL_VideoDisplay * display, SDL_DisplayMode * mode)
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{
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return 0;
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}
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void
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OFFSCREEN_VideoQuit(_THIS)
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{
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}
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#endif /* SDL_VIDEO_DRIVER_OFFSCREEN */
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/* vi: set ts=4 sw=4 expandtab: */
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