kc3-lang/SDL/src/video/wayland/SDL_waylandopengles.h

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• Hash : c54c16d3
  Author :
  Date : 2021-04-30T13:19:36
  

  wayland: don't hang in SDL_GL_SwapBuffers if the compositor is ghosting us.
  
  If you hide a window on Mutter, for example, the compositor never requests
  new frames, which will cause Mesa to block forever in eglSwapBuffers to
  satisfy the swap interval.
  
  We now always set the swap interval to 0 and manage this ourselves, handing
  the frame to Wayland when it requests a new one, and timing out at 10fps just
  to keep apps moving if the compositor wants no frames at all.
  
  My understanding is that other protocols are coming that might improve upon
  this solution, but for now it solves the total hang.
  
  Fixes #4335.
  

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• src/video/wayland/SDL_waylandopengles.h

• /*
    Simple DirectMedia Layer
    Copyright (C) 1997-2021 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"
  
  #ifndef SDL_waylandopengles_h_
  #define SDL_waylandopengles_h_
  
  #include "../SDL_sysvideo.h"
  #include "../SDL_egl_c.h"
  
  typedef struct SDL_PrivateGLESData
  {
      int dummy;
  } SDL_PrivateGLESData;
  
  /* OpenGLES functions */
  #define Wayland_GLES_GetAttribute SDL_EGL_GetAttribute
  #define Wayland_GLES_GetProcAddress SDL_EGL_GetProcAddress
  #define Wayland_GLES_UnloadLibrary SDL_EGL_UnloadLibrary
  
  extern int Wayland_GLES_LoadLibrary(_THIS, const char *path);
  extern SDL_GLContext Wayland_GLES_CreateContext(_THIS, SDL_Window * window);
  extern int Wayland_GLES_SetSwapInterval(_THIS, int interval);
  extern int Wayland_GLES_GetSwapInterval(_THIS);
  extern int Wayland_GLES_SwapWindow(_THIS, SDL_Window * window);
  extern int Wayland_GLES_MakeCurrent(_THIS, SDL_Window * window, SDL_GLContext context);
  extern void Wayland_GLES_GetDrawableSize(_THIS, SDL_Window * window, int * w, int * h);
  extern void Wayland_GLES_DeleteContext(_THIS, SDL_GLContext context);
  
  #endif /* SDL_waylandopengles_h_ */
  
  /* vi: set ts=4 sw=4 expandtab: */
  

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