kc3-lang/SDL/src/video/windows/SDL_windowsopengles.c

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• Hash : cff9eac6
  Author :
  Date : 2014-06-22T09:48:46
  

  Fixed bug 2579 - SDL fails to compile on Windows when only EGL+OpenGL ES defined callow.mark Compiling with SDL_VIDEO_RENDER_OGL=0, SDL_VIDEO_OPENGL=0, SDL_VIDEO_OPENGL_WGL=0, SDL_VIDEO_RENDER_OGL_ES2=1, SDL_VIDEO_OPENGL_ES2=1 and SDL_VIDEO_OPENGL_EGL=1 set in SDL_config_windows.h fails. A patch is attached. See bug #2570 for reasons you might want to compile this way.

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• src/video/windows/SDL_windowsopengles.c

• /*
    Simple DirectMedia Layer
    Copyright (C) 1997-2014 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_WINDOWS && SDL_VIDEO_OPENGL_EGL
  
  #include "SDL_windowsvideo.h"
  #include "SDL_windowsopengles.h"
  #include "SDL_windowsopengl.h"
  #include "SDL_log.h"
  
  /* EGL implementation of SDL OpenGL support */
  
  int
  WIN_GLES_LoadLibrary(_THIS, const char *path) {
  
      /* If the profile requested is not GL ES, switch over to WIN_GL functions  */
      if (_this->gl_config.profile_mask != SDL_GL_CONTEXT_PROFILE_ES) {
  #if SDL_VIDEO_OPENGL_WGL
          WIN_GLES_UnloadLibrary(_this);
          _this->GL_LoadLibrary = WIN_GL_LoadLibrary;
          _this->GL_GetProcAddress = WIN_GL_GetProcAddress;
          _this->GL_UnloadLibrary = WIN_GL_UnloadLibrary;
          _this->GL_CreateContext = WIN_GL_CreateContext;
          _this->GL_MakeCurrent = WIN_GL_MakeCurrent;
          _this->GL_SetSwapInterval = WIN_GL_SetSwapInterval;
          _this->GL_GetSwapInterval = WIN_GL_GetSwapInterval;
          _this->GL_SwapWindow = WIN_GL_SwapWindow;
          _this->GL_DeleteContext = WIN_GL_DeleteContext;
          return WIN_GL_LoadLibrary(_this, path);
  #else
          return SDL_SetError("SDL not configured with OpenGL/WGL support");
  #endif
      }
      
      if (_this->egl_data == NULL) {
          return SDL_EGL_LoadLibrary(_this, NULL, EGL_DEFAULT_DISPLAY);
      }
  
      return 0;
  }
  
  SDL_GLContext
  WIN_GLES_CreateContext(_THIS, SDL_Window * window)
  {
      SDL_GLContext context;
      SDL_WindowData *data = (SDL_WindowData *)window->driverdata;
  
  #if SDL_VIDEO_OPENGL_WGL
      if (_this->gl_config.profile_mask != SDL_GL_CONTEXT_PROFILE_ES) {
          /* Switch to WGL based functions */
          WIN_GLES_UnloadLibrary(_this);
          _this->GL_LoadLibrary = WIN_GL_LoadLibrary;
          _this->GL_GetProcAddress = WIN_GL_GetProcAddress;
          _this->GL_UnloadLibrary = WIN_GL_UnloadLibrary;
          _this->GL_CreateContext = WIN_GL_CreateContext;
          _this->GL_MakeCurrent = WIN_GL_MakeCurrent;
          _this->GL_SetSwapInterval = WIN_GL_SetSwapInterval;
          _this->GL_GetSwapInterval = WIN_GL_GetSwapInterval;
          _this->GL_SwapWindow = WIN_GL_SwapWindow;
          _this->GL_DeleteContext = WIN_GL_DeleteContext;
  
          if (WIN_GL_LoadLibrary(_this, NULL) != 0) {
              return NULL;
          }
  
          return WIN_GL_CreateContext(_this, window);
      }
  #endif
  
      context = SDL_EGL_CreateContext(_this, data->egl_surface);
      return context;
  }
  
  void
  WIN_GLES_DeleteContext(_THIS, SDL_GLContext context)
  {
      SDL_EGL_DeleteContext(_this, context);
      WIN_GLES_UnloadLibrary(_this);
  }
  
  SDL_EGL_SwapWindow_impl(WIN)
  SDL_EGL_MakeCurrent_impl(WIN)
  
  int
  WIN_GLES_SetupWindow(_THIS, SDL_Window * window)
  {
      /* The current context is lost in here; save it and reset it. */
      SDL_WindowData *windowdata = (SDL_WindowData *) window->driverdata;
      SDL_Window *current_win = SDL_GL_GetCurrentWindow();
      SDL_GLContext current_ctx = SDL_GL_GetCurrentContext();
  
  
      if (_this->egl_data == NULL) {
          if (SDL_EGL_LoadLibrary(_this, NULL, EGL_DEFAULT_DISPLAY) < 0) {
              return -1;
          }
      }
    
      /* Create the GLES window surface */
      windowdata->egl_surface = SDL_EGL_CreateSurface(_this, (NativeWindowType)windowdata->hwnd);
  
      if (windowdata->egl_surface == EGL_NO_SURFACE) {
          return SDL_SetError("Could not create GLES window surface");
      }
  
      return WIN_GLES_MakeCurrent(_this, current_win, current_ctx);    
  }
  
  int
  WIN_GLES_SetSwapInterval(_THIS, int interval)
  {
      /* FIXME: This should call SDL_EGL_SetSwapInterval, but ANGLE has a bug that prevents this
       * from working if we do (the window contents freeze and don't swap properly). So, we ignore
       * the request for now.
       */
      SDL_Log("WARNING: Ignoring SDL_GL_SetSwapInterval call due to ANGLE bug");
      return 0;
  }
  
  #endif /* SDL_VIDEO_DRIVER_WINDOWS && SDL_VIDEO_OPENGL_EGL */
  
  /* vi: set ts=4 sw=4 expandtab: */
  

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