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Simple DirectMedia Layer
Copyright (C) 1997-2021 Sam Lantinga <>
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.
#ifndef SDL_main_h_
#define SDL_main_h_
#include "SDL_stdinc.h"
* \file SDL_main.h
* Redefine main() on some platforms so that it is called by SDL.
#if defined(__WIN32__)
/* On Windows SDL provides WinMain(), which parses the command line and passes
the arguments to your main function.
If you provide your own WinMain(), you may define SDL_MAIN_HANDLED
#elif defined(__WINRT__)
/* On WinRT, SDL provides a main function that initializes CoreApplication,
creating an instance of IFrameworkView in the process.
Please note that #include'ing SDL_main.h is not enough to get a main()
function working. In non-XAML apps, the file,
src/main/winrt/SDL_WinRT_main_NonXAML.cpp, or a copy of it, must be compiled
into the app itself. In XAML apps, the function, SDL_WinRTRunApp must be
called, with a pointer to the Direct3D-hosted XAML control passed in.
#elif defined(__IPHONEOS__)
/* On iOS SDL provides a main function that creates an application delegate
and starts the iOS application run loop.
If you link with SDL dynamically on iOS, the main function can't be in a
shared library, so you need to link with libSDLmain.a, which includes a
stub main function that calls into the shared library to start execution.
See src/video/uikit/SDL_uikitappdelegate.m for more details.
#elif defined(__ANDROID__)
/* On Android SDL provides a Java class in that is the
main activity entry point.
See docs/ for more details on extending that class.
/* We need to export SDL_main so it can be launched from Java */
#elif defined(__NACL__)
/* On NACL we use ppapi_simple to set up the application helper code,
then wait for the first PSE_INSTANCE_DIDCHANGEVIEW event before
starting the user main function.
All user code is run in a separate thread by ppapi_simple, thus
allowing for blocking io to take place via nacl_io
#endif /* SDL_MAIN_HANDLED */
* \file SDL_main.h
* The application's main() function must be called with C linkage,
* and should be declared like this:
* \code
* #ifdef __cplusplus
* extern "C"
* #endif
* int main(int argc, char *argv[])
* {
* }
* \endcode
#if defined(SDL_MAIN_NEEDED) || defined(SDL_MAIN_AVAILABLE)
#define main SDL_main
#include "begin_code.h"
#ifdef __cplusplus
extern "C" {
* The prototype for the application's main() function
typedef int (*SDL_main_func)(int argc, char *argv[]);
extern SDLMAIN_DECLSPEC int SDL_main(int argc, char *argv[]);
* This is called by the real SDL main function to let the rest of the
* library know that initialization was done properly.
* Calling this yourself without knowing what you're doing can cause
* crashes and hard to diagnose problems with your application.
extern DECLSPEC void SDLCALL SDL_SetMainReady(void);
#ifdef __WIN32__
* This can be called to set the application class at startup
extern DECLSPEC int SDLCALL SDL_RegisterApp(char *name, Uint32 style, void *hInst);
extern DECLSPEC void SDLCALL SDL_UnregisterApp(void);
#endif /* __WIN32__ */
#ifdef __WINRT__
* \brief Initializes and launches an SDL/WinRT application.
* \param mainFunction The SDL app's C-style main().
* \param reserved Reserved for future use; should be NULL
* \return 0 on success, -1 on failure. On failure, use SDL_GetError to retrieve more
* information on the failure.
extern DECLSPEC int SDLCALL SDL_WinRTRunApp(SDL_main_func mainFunction, void * reserved);
#endif /* __WINRT__ */
#if defined(__IPHONEOS__)
* \brief Initializes and launches an SDL application.
* \param argc The argc parameter from the application's main() function
* \param argv The argv parameter from the application's main() function
* \param mainFunction The SDL app's C-style main().
* \return the return value from mainFunction
extern DECLSPEC int SDLCALL SDL_UIKitRunApp(int argc, char *argv[], SDL_main_func mainFunction);
#endif /* __IPHONEOS__ */
#ifdef __cplusplus
#include "close_code.h"
#endif /* SDL_main_h_ */
/* vi: set ts=4 sw=4 expandtab: */