Function opengl_Init

renderer/HardwareOpenGL.cpp:620–813

Sets up our OpenGL rendering context Returns 1 if ok, 0 if something bad

// Sets up our OpenGL rendering context
// Returns 1 if ok, 0 if something bad
int opengl_Init(oeApplication *app, renderer_preferred_state *pref_state) {
  int width, height;
  int retval = 1;
  int i;

  mprintf(0, "Setting up opengl mode!\n");

  if (pref_state) {
    gpu_preferred_state = *pref_state;
  }

  if (app != NULL) {
    ParentApplication = app;
  }

  int windowX = 0, windowY = 0;

  /***********************************************************
   *               LINUX OPENGL
   ***********************************************************
   */
  // Setup gpu_state.screen_width & gpu_state.screen_height & width & height
  width = gpu_preferred_state.width;
  height = gpu_preferred_state.height;

  if (!opengl_Setup(app, &width, &height)) {
    opengl_Close();
    return 0;
  }

  memset(&gpu_state, 0, sizeof(rendering_state));
  gpu_state.screen_width = width;
  gpu_state.screen_height = height;

  // Get some info
  opengl_GetInformation();

  mprintf(0, "Setting up multitexture...\n");

  // Determine if Multitexture is supported
  bool supportsMultiTexture = opengl_CheckExtension("GL_ARB_multitexture");
  if (!supportsMultiTexture) {
    supportsMultiTexture = opengl_CheckExtension("GL_SGIS_multitexture");
  }

  if (FindArg("-NoMultitexture")) {
    supportsMultiTexture = false;
  }

  if (supportsMultiTexture) {
    // attempt to grab Multitexture functions
    opengl_GetDLLFunctions();
  } else {
    // No multitexture at all
    UseMultitexture = false;
  }

  // Do we have packed pixel formats?