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  1. /*
  2.   Simple DirectMedia Layer
  3.   Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org>
  4.  
  5.   This software is provided 'as-is', without any express or implied
  6.   warranty.  In no event will the authors be held liable for any damages
  7.   arising from the use of this software.
  8.  
  9.   Permission is granted to anyone to use this software for any purpose,
  10.   including commercial applications, and to alter it and redistribute it
  11.   freely, subject to the following restrictions:
  12.  
  13.   1. The origin of this software must not be misrepresented; you must not
  14.      claim that you wrote the original software. If you use this software
  15.      in a product, an acknowledgment in the product documentation would be
  16.      appreciated but is not required.
  17.   2. Altered source versions must be plainly marked as such, and must not be
  18.      misrepresented as being the original software.
  19.   3. This notice may not be removed or altered from any source distribution.
  20. */
  21.  
  22. #ifndef SDL_main_h_
  23. #define SDL_main_h_
  24.  
  25. #include "SDL_stdinc.h"
  26.  
  27. /**
  28.  *  \file SDL_main.h
  29.  *
  30.  *  Redefine main() on some platforms so that it is called by SDL.
  31.  */
  32.  
  33. #ifndef SDL_MAIN_HANDLED
  34. #if defined(__WIN32__)
  35. /* On Windows SDL provides WinMain(), which parses the command line and passes
  36.    the arguments to your main function.
  37.  
  38.    If you provide your own WinMain(), you may define SDL_MAIN_HANDLED
  39.  */
  40. #define SDL_MAIN_AVAILABLE
  41.  
  42. #elif defined(__WINRT__)
  43. /* On WinRT, SDL provides a main function that initializes CoreApplication,
  44.    creating an instance of IFrameworkView in the process.
  45.  
  46.    Please note that #include'ing SDL_main.h is not enough to get a main()
  47.    function working.  In non-XAML apps, the file,
  48.    src/main/winrt/SDL_WinRT_main_NonXAML.cpp, or a copy of it, must be compiled
  49.    into the app itself.  In XAML apps, the function, SDL_WinRTRunApp must be
  50.    called, with a pointer to the Direct3D-hosted XAML control passed in.
  51. */
  52. #define SDL_MAIN_NEEDED
  53.  
  54. #elif defined(__IPHONEOS__)
  55. /* On iOS SDL provides a main function that creates an application delegate
  56.    and starts the iOS application run loop.
  57.  
  58.    See src/video/uikit/SDL_uikitappdelegate.m for more details.
  59.  */
  60. #define SDL_MAIN_NEEDED
  61.  
  62. #elif defined(__ANDROID__)
  63. /* On Android SDL provides a Java class in SDLActivity.java that is the
  64.    main activity entry point.
  65.  
  66.    See docs/README-android.md for more details on extending that class.
  67.  */
  68. #define SDL_MAIN_NEEDED
  69.  
  70. /* We need to export SDL_main so it can be launched from Java */
  71. #define SDLMAIN_DECLSPEC    DECLSPEC
  72.  
  73. #elif defined(__NACL__)
  74. /* On NACL we use ppapi_simple to set up the application helper code,
  75.    then wait for the first PSE_INSTANCE_DIDCHANGEVIEW event before
  76.    starting the user main function.
  77.    All user code is run in a separate thread by ppapi_simple, thus
  78.    allowing for blocking io to take place via nacl_io
  79. */
  80. #define SDL_MAIN_NEEDED
  81.  
  82. #endif
  83. #endif /* SDL_MAIN_HANDLED */
  84.  
  85. #ifdef __cplusplus
  86. #define C_LINKAGE   "C"
  87. #else
  88. #define C_LINKAGE
  89. #endif /* __cplusplus */
  90.  
  91. #ifndef SDLMAIN_DECLSPEC
  92. #define SDLMAIN_DECLSPEC
  93. #endif
  94.  
  95. /**
  96.  *  \file SDL_main.h
  97.  *
  98.  *  The application's main() function must be called with C linkage,
  99.  *  and should be declared like this:
  100.  *  \code
  101.  *  #ifdef __cplusplus
  102.  *  extern "C"
  103.  *  #endif
  104.  *  int main(int argc, char *argv[])
  105.  *  {
  106.  *  }
  107.  *  \endcode
  108.  */
  109.  
  110. #if defined(SDL_MAIN_NEEDED) || defined(SDL_MAIN_AVAILABLE)
  111. #define main    SDL_main
  112. #endif
  113.  
  114. /**
  115.  *  The prototype for the application's main() function
  116.  */
  117. extern C_LINKAGE SDLMAIN_DECLSPEC int SDL_main(int argc, char *argv[]);
  118.  
  119.  
  120. #include "begin_code.h"
  121. #ifdef __cplusplus
  122. extern "C" {
  123. #endif
  124.  
  125. /**
  126.  *  This is called by the real SDL main function to let the rest of the
  127.  *  library know that initialization was done properly.
  128.  *
  129.  *  Calling this yourself without knowing what you're doing can cause
  130.  *  crashes and hard to diagnose problems with your application.
  131.  */
  132. extern DECLSPEC void SDLCALL SDL_SetMainReady(void);
  133.  
  134. #ifdef __WIN32__
  135.  
  136. /**
  137.  *  This can be called to set the application class at startup
  138.  */
  139. extern DECLSPEC int SDLCALL SDL_RegisterApp(char *name, Uint32 style,
  140.                                             void *hInst);
  141. extern DECLSPEC void SDLCALL SDL_UnregisterApp(void);
  142.  
  143. #endif /* __WIN32__ */
  144.  
  145.  
  146. #ifdef __WINRT__
  147.  
  148. /**
  149.  *  \brief Initializes and launches an SDL/WinRT application.
  150.  *
  151.  *  \param mainFunction The SDL app's C-style main().
  152.  *  \param reserved Reserved for future use; should be NULL
  153.  *  \return 0 on success, -1 on failure.  On failure, use SDL_GetError to retrieve more
  154.  *      information on the failure.
  155.  */
  156. extern DECLSPEC int SDLCALL SDL_WinRTRunApp(int (*mainFunction)(int, char **), void * reserved);
  157.  
  158. #endif /* __WINRT__ */
  159.  
  160.  
  161. #ifdef __cplusplus
  162. }
  163. #endif
  164. #include "close_code.h"
  165.  
  166. #endif /* SDL_main_h_ */
  167.  
  168. /* vi: set ts=4 sw=4 expandtab: */
  169.