kc3-lang/SDL/src/video/offscreen/SDL_offscreenwindow.c

• Show log

  Commit

• Hash : 68985371
  Author :
  Date : 2019-09-24T16:36:48
  

  offscreen: Add new video driver backend Offscreen
  
  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
  

Download

• src/video/offscreen/SDL_offscreenwindow.c

• /*
    Simple DirectMedia Layer
    Copyright (C) 1997-2019 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"
  
  #if SDL_VIDEO_DRIVER_OFFSCREEN
  
  #include "../SDL_egl_c.h"
  #include "../SDL_sysvideo.h"
  
  #include "SDL_offscreenwindow.h"
  
  int
  OFFSCREEN_CreateWindow(_THIS, SDL_Window* window)
  {
      OFFSCREEN_Window* offscreen_window = SDL_calloc(1, sizeof(OFFSCREEN_Window));
  
      if (!offscreen_window) {
          return SDL_OutOfMemory();
      }
  
      window->driverdata = offscreen_window;
  
      if (window->x == SDL_WINDOWPOS_UNDEFINED) {
          window->x = 0;
      }
  
      if (window->y == SDL_WINDOWPOS_UNDEFINED) {
          window->y = 0;
      }
  
      offscreen_window->sdl_window = window;
  
      if (window->flags & SDL_WINDOW_OPENGL) {
  
          if (!_this->egl_data) {
              return SDL_SetError("Cannot create an OPENGL window invalid egl_data");
          }
  
          offscreen_window->egl_surface = SDL_EGL_CreateOffscreenSurface(_this, window->w, window->h);
  
          if (offscreen_window->egl_surface == EGL_NO_SURFACE) {
              return SDL_SetError("Failed to created an offscreen surface (EGL display: %p)",
                                  _this->egl_data->egl_display);
          }
      }
      else {
          offscreen_window->egl_surface = EGL_NO_SURFACE;
      }
  
      return 0;
  }
  
  void
  OFFSCREEN_DestroyWindow(_THIS, SDL_Window* window)
  {
      OFFSCREEN_Window* offscreen_window = window->driverdata;
  
      if (offscreen_window) {
          SDL_EGL_DestroySurface(_this, offscreen_window->egl_surface);
          SDL_free(offscreen_window);
      }
  
      window->driverdata = NULL;
  }
  
  #endif /* SDL_VIDEO_DRIVER_OFFSCREEN */
  
  /* vi: set ts=4 sw=4 expandtab: */
  

Download