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https://github.com/Relintai/sdl2_frt.git
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68985371a0
The Offscreen video driver is intended to be used for headless rendering as well as allows for multiple GPUs to be used for headless rendering Currently only supports EGL (OpenGL / ES) or Framebuffers Adds a hint to specifiy which EGL device to use: SDL_HINT_EGL_DEVICE Adds testoffscreen.c which can be used to test the backend out Disabled by default for now
91 lines
2.9 KiB
C
91 lines
2.9 KiB
C
/*
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Simple DirectMedia Layer
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Copyright (C) 1997-2019 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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#include "../SDL_sysvideo.h"
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#include "SDL_offscreenframebuffer_c.h"
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#define OFFSCREEN_SURFACE "_SDL_DummySurface"
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int SDL_OFFSCREEN_CreateWindowFramebuffer(_THIS, SDL_Window * window, Uint32 * format, void ** pixels, int *pitch)
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{
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SDL_Surface *surface;
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const Uint32 surface_format = SDL_PIXELFORMAT_RGB888;
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int w, h;
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int bpp;
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Uint32 Rmask, Gmask, Bmask, Amask;
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/* Free the old framebuffer surface */
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surface = (SDL_Surface *) SDL_GetWindowData(window, OFFSCREEN_SURFACE);
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SDL_FreeSurface(surface);
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/* Create a new one */
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SDL_PixelFormatEnumToMasks(surface_format, &bpp, &Rmask, &Gmask, &Bmask, &Amask);
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SDL_GetWindowSize(window, &w, &h);
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surface = SDL_CreateRGBSurface(0, w, h, bpp, Rmask, Gmask, Bmask, Amask);
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if (!surface) {
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return -1;
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}
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/* Save the info and return! */
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SDL_SetWindowData(window, OFFSCREEN_SURFACE, surface);
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*format = surface_format;
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*pixels = surface->pixels;
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*pitch = surface->pitch;
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return 0;
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}
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int SDL_OFFSCREEN_UpdateWindowFramebuffer(_THIS, SDL_Window * window, const SDL_Rect * rects, int numrects)
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{
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static int frame_number;
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SDL_Surface *surface;
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surface = (SDL_Surface *) SDL_GetWindowData(window, OFFSCREEN_SURFACE);
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if (!surface) {
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return SDL_SetError("Couldn't find offscreen surface for window");
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}
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/* Send the data to the display */
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if (SDL_getenv("SDL_VIDEO_OFFSCREEN_SAVE_FRAMES")) {
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char file[128];
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SDL_snprintf(file, sizeof(file), "SDL_window%d-%8.8d.bmp",
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SDL_GetWindowID(window), ++frame_number);
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SDL_SaveBMP(surface, file);
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}
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return 0;
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}
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void SDL_OFFSCREEN_DestroyWindowFramebuffer(_THIS, SDL_Window * window)
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{
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SDL_Surface *surface;
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surface = (SDL_Surface *) SDL_SetWindowData(window, OFFSCREEN_SURFACE, NULL);
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SDL_FreeSurface(surface);
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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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