Mercurial > sdl-ios-xcode
annotate include/SDL_thread.h @ 1295:c3e36ac8a94c
Date: Sun, 6 Mar 2005 17:06:20 +0100
From: Per Inge Mathisen
Subject: [SDL] Fullscreen refresh on win32
Windows has a terrible default for fullscreen 3D apps of 60mhz refresh
rate. This can be fixed by the user by going into his driver's
control panel and forcing the refresh rate higher. However, this not a
very user friendly way about it, and in any case SDL contains no code
that could figure out this that condition has afflicted the user.
So the question is, could SDL fix this for the user? It is possible
under Windows to request a higher refresh rate. The danger is of
course that if the user has an old monitor, and you request a too high
refresh rate, the monitor could be damaged. However, I believe there
might be a way around that: Check before switching what refresh rate
the user's desktop runs in, and if our fullscreen dimensions are equal
or less than those of the desktop, use the higher refresh rate of 60
and the desktop rate.
Since most users run their desktops in the same or higher resolution
something sane, this should fix this problem for most users.
Thoughts?
An alternative is to add an SDL_GL_GetAttribute(SDL_GL_REFRESH_RATE)
option so that programs can bitch at their users at their own
convenience.
- Per
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Mon, 30 Jan 2006 06:56:10 +0000 |
| parents | 173c063d4f55 |
| children | c9b51268668f |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 SDL - Simple DirectMedia Layer | |
|
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Updated copyright information for 2004 (Happy New Year!)
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3 Copyright (C) 1997-2004 Sam Lantinga |
| 0 | 4 |
| 5 This library is free software; you can redistribute it and/or | |
| 6 modify it under the terms of the GNU Library General Public | |
| 7 License as published by the Free Software Foundation; either | |
| 8 version 2 of the License, or (at your option) any later version. | |
| 9 | |
| 10 This library is distributed in the hope that it will be useful, | |
| 11 but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 13 Library General Public License for more details. | |
| 14 | |
| 15 You should have received a copy of the GNU Library General Public | |
| 16 License along with this library; if not, write to the Free | |
| 17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
| 18 | |
| 19 Sam Lantinga | |
|
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20 slouken@libsdl.org |
| 0 | 21 */ |
| 22 | |
| 23 #ifdef SAVE_RCSID | |
| 24 static char rcsid = | |
| 25 "@(#) $Id$"; | |
| 26 #endif | |
| 27 | |
| 28 #ifndef _SDL_thread_h | |
| 29 #define _SDL_thread_h | |
| 30 | |
| 31 /* Header for the SDL thread management routines | |
| 32 | |
| 33 These are independent of the other SDL routines. | |
| 34 */ | |
| 35 | |
| 36 #include "SDL_main.h" | |
| 37 #include "SDL_types.h" | |
| 38 | |
| 39 /* Thread synchronization primitives */ | |
| 40 #include "SDL_mutex.h" | |
| 41 | |
| 42 #include "begin_code.h" | |
| 43 /* Set up for C function definitions, even when using C++ */ | |
| 44 #ifdef __cplusplus | |
| 45 extern "C" { | |
| 46 #endif | |
| 47 | |
| 48 /* The SDL thread structure, defined in SDL_thread.c */ | |
| 49 struct SDL_Thread; | |
| 50 typedef struct SDL_Thread SDL_Thread; | |
| 51 | |
| 52 /* Create a thread */ | |
| 1190 | 53 #ifdef __OS2__ |
| 54 /* | |
| 55 We compile SDL into a DLL on OS/2. This means, that it's the DLL which | |
| 56 creates a new thread for the calling process with the SDL_CreateThread() | |
| 57 API. There is a problem with this, that only the RTL of the SDL.DLL will | |
| 58 be initialized for those threads, and not the RTL of the calling application! | |
| 59 To solve this, we make a little hack here. | |
| 60 We'll always use the caller's _beginthread() and _endthread() APIs to | |
| 61 start a new thread. This way, it it's the SDL.DLL which uses this API, | |
| 62 then the RTL of SDL.DLL will be used to create the new thread, and if it's | |
| 63 the application, then the RTL of the application will be used. | |
| 64 So, in short: | |
| 65 Always use the _beginthread() and _endthread() of the calling runtime library! | |
| 66 */ | |
| 67 | |
| 68 #ifdef __WATCOMC__ | |
| 69 #include <process.h> // This has _beginthread() and _endthread() defined! | |
| 70 #endif | |
| 71 #ifdef __EMX__ | |
| 72 #include <stdlib.h> // This has _beginthread() and _endthread() defined, if -Zmt flag is used! | |
| 73 #endif | |
| 74 | |
| 75 typedef Uint32 SDLCALL (*pfnSDL_CurrentBeginThread)(void (*pfnThreadFn)(void *), Uint32 uiStackSize, void *pParam); | |
| 76 typedef void SDLCALL (*pfnSDL_CurrentEndThread)(void); | |
| 77 | |
| 78 extern DECLSPEC SDL_Thread * SDLCALL SDL_CreateThread_Core(int (*fn)(void *), void *data, pfnSDL_CurrentBeginThread pfnBeginThread, pfnSDL_CurrentEndThread pfnEndThread); | |
| 79 | |
| 80 // Disable warnings about unreferenced symbol! | |
| 81 #pragma disable_message (202) | |
| 82 static Uint32 SDLCALL SDL_CurrentBeginThread(void (*pfnThreadFn)(void *), Uint32 uiStackSize, void *pParam) | |
| 83 { | |
| 84 return _beginthread(pfnThreadFn, NULL, uiStackSize, pParam); | |
| 85 } | |
| 86 | |
| 87 static void SDLCALL SDL_CurrentEndThread(void) | |
| 88 { | |
| 89 _endthread(); | |
| 90 } | |
| 91 | |
| 92 #define SDL_CreateThread(fn, data) SDL_CreateThread_Core(fn, data, SDL_CurrentBeginThread, SDL_CurrentEndThread) | |
| 93 | |
| 94 #else | |
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95 extern DECLSPEC SDL_Thread * SDLCALL SDL_CreateThread(int (SDLCALL *fn)(void *), void *data); |
| 1190 | 96 #endif |
| 0 | 97 |
| 98 /* Get the 32-bit thread identifier for the current thread */ | |
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99 extern DECLSPEC Uint32 SDLCALL SDL_ThreadID(void); |
| 0 | 100 |
| 101 /* Get the 32-bit thread identifier for the specified thread, | |
| 102 equivalent to SDL_ThreadID() if the specified thread is NULL. | |
| 103 */ | |
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104 extern DECLSPEC Uint32 SDLCALL SDL_GetThreadID(SDL_Thread *thread); |
| 0 | 105 |
| 106 /* Wait for a thread to finish. | |
| 107 The return code for the thread function is placed in the area | |
| 108 pointed to by 'status', if 'status' is not NULL. | |
| 109 */ | |
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110 extern DECLSPEC void SDLCALL SDL_WaitThread(SDL_Thread *thread, int *status); |
| 0 | 111 |
| 112 /* Forcefully kill a thread without worrying about its state */ | |
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113 extern DECLSPEC void SDLCALL SDL_KillThread(SDL_Thread *thread); |
| 0 | 114 |
| 115 | |
| 116 /* Ends C function definitions when using C++ */ | |
| 117 #ifdef __cplusplus | |
| 118 } | |
| 119 #endif | |
| 120 #include "close_code.h" | |
| 121 | |
| 122 #endif /* _SDL_thread_h */ |