janwas
65f9816a21
- main init hook no longer calls main() - that was causing stack weirdness and is forbidden. provide support for the app calling init directly (in case someone else is already hooking main) - wdetect: add support for old drivers that set OpenGLDrivers incorrectly (my laptop, so I can test ;p) This was SVN commit r2418.
78 lines
2.6 KiB
C
Executable File
78 lines
2.6 KiB
C
Executable File
// compatibility fixes when compiling on Win32
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// Copyright (c) 2002-2005 Jan Wassenberg
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//
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// This program is free software; you can redistribute it and/or
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// modify it under the terms of the GNU General Public License as
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// published by the Free Software Foundation; either version 2 of the
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// License, or (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful, but
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// WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// General Public License for more details.
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//
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// Contact info:
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// Jan.Wassenberg@stud.uni-karlsruhe.de
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// http://www.stud.uni-karlsruhe.de/~urkt/
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#ifndef WIN_H__
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#define WIN_H__
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#ifndef _WIN32
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#error "including win.h without _WIN32 defined"
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#endif
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#include "config.h"
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#include <wchar.h>
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// provide C99 *snprintf functions if compiler doesn't already
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// (MinGW does, VC7.1 doesn't).
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#ifndef HAVE_C99
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# define snprintf _snprintf
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# define swprintf _snwprintf
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# define vsnprintf _vsnprintf
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# define vsnwprintf _vsnwprintf
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#endif
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#include <stddef.h> // wchar_t
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// libpng.h -> zlib.h -> zconf.h includes <windows.h>, which causes conflicts.
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// prevent that, and define what they actually need from windows.h.
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// incidentally, this requires all dependents of windows.h to include
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// sysdep/win/win_internal.h instead.
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#define _WINDOWS_ // windows.h include guard
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#define WINAPI __stdcall
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#define WINAPIV __cdecl
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//
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// main() hook
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//
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// our Windows-specific init code needs to run before the regular main() code.
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// ideally this would happen automagically, but there are two problems:
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// - the C standard expressly forbids calling main() directly;
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// VC apparently makes use of this and changes its calling convention.
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// if we call it, everything appears to work but stack traces in
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// release mode are incorrect (symbol address is off by 4).
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// - other libraries may also want to hook main(); in that case,
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// "one must fall". we need to provide for disabling our hook.
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// this is not enough reason to forego a hook entirely -
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// integration into new projects is easier when there is less
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// stuff to remember (here, calling our init function directly).
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//
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// what we'll do is: redefine the app's main function to app_main, have the
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// OS call our main, and call app_main from there. in case another library
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// (e.g. SDL) has the same idea, #define NO_MAIN_REDIRECT prevents the
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// above; you then need to call win_pre_main_init at the beginning of main().
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//#define NO_MAIN_REDIRECT
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#ifdef NO_MAIN_REDIRECT
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extern void win_pre_main_init();
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#else
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#define main app_main
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#endif
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#endif // #ifndef WIN_H__
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