Mercurial > sdl-ios-xcode
annotate include/SDL_keyboard.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 | 04a403e4ccf5 |
| children | c9b51268668f |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 SDL - Simple DirectMedia Layer | |
|
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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 /* Include file for SDL keyboard event handling */ | |
| 29 | |
| 30 #ifndef _SDL_keyboard_h | |
| 31 #define _SDL_keyboard_h | |
| 32 | |
| 33 #include "SDL_types.h" | |
| 34 #include "SDL_keysym.h" | |
| 35 | |
| 36 #include "begin_code.h" | |
| 37 /* Set up for C function definitions, even when using C++ */ | |
| 38 #ifdef __cplusplus | |
| 39 extern "C" { | |
| 40 #endif | |
| 41 | |
| 42 /* Keysym structure | |
| 43 - The scancode is hardware dependent, and should not be used by general | |
| 44 applications. If no hardware scancode is available, it will be 0. | |
| 45 | |
| 46 - The 'unicode' translated character is only available when character | |
| 47 translation is enabled by the SDL_EnableUNICODE() API. If non-zero, | |
| 48 this is a UNICODE character corresponding to the keypress. If the | |
| 49 high 9 bits of the character are 0, then this maps to the equivalent | |
| 50 ASCII character: | |
| 51 char ch; | |
| 52 if ( (keysym.unicode & 0xFF80) == 0 ) { | |
| 53 ch = keysym.unicode & 0x7F; | |
| 54 } else { | |
| 55 An international character.. | |
| 56 } | |
| 57 */ | |
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58 typedef struct SDL_keysym { |
| 0 | 59 Uint8 scancode; /* hardware specific scancode */ |
| 60 SDLKey sym; /* SDL virtual keysym */ | |
| 61 SDLMod mod; /* current key modifiers */ | |
| 62 Uint16 unicode; /* translated character */ | |
| 63 } SDL_keysym; | |
| 64 | |
| 65 /* This is the mask which refers to all hotkey bindings */ | |
| 66 #define SDL_ALL_HOTKEYS 0xFFFFFFFF | |
| 67 | |
| 68 /* Function prototypes */ | |
| 69 /* | |
| 70 * Enable/Disable UNICODE translation of keyboard input. | |
| 71 * This translation has some overhead, so translation defaults off. | |
| 72 * If 'enable' is 1, translation is enabled. | |
| 73 * If 'enable' is 0, translation is disabled. | |
| 74 * If 'enable' is -1, the translation state is not changed. | |
| 75 * It returns the previous state of keyboard translation. | |
| 76 */ | |
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77 extern DECLSPEC int SDLCALL SDL_EnableUNICODE(int enable); |
| 0 | 78 |
| 79 /* | |
| 80 * Enable/Disable keyboard repeat. Keyboard repeat defaults to off. | |
| 81 * 'delay' is the initial delay in ms between the time when a key is | |
| 82 * pressed, and keyboard repeat begins. | |
| 83 * 'interval' is the time in ms between keyboard repeat events. | |
| 84 */ | |
| 85 #define SDL_DEFAULT_REPEAT_DELAY 500 | |
| 86 #define SDL_DEFAULT_REPEAT_INTERVAL 30 | |
| 87 /* | |
| 88 * If 'delay' is set to 0, keyboard repeat is disabled. | |
| 89 */ | |
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90 extern DECLSPEC int SDLCALL SDL_EnableKeyRepeat(int delay, int interval); |
| 0 | 91 |
| 92 /* | |
| 93 * Get a snapshot of the current state of the keyboard. | |
| 94 * Returns an array of keystates, indexed by the SDLK_* syms. | |
| 95 * Used: | |
| 96 * Uint8 *keystate = SDL_GetKeyState(NULL); | |
| 97 * if ( keystate[SDLK_RETURN] ) ... <RETURN> is pressed. | |
| 98 */ | |
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99 extern DECLSPEC Uint8 * SDLCALL SDL_GetKeyState(int *numkeys); |
| 0 | 100 |
| 101 /* | |
| 102 * Get the current key modifier state | |
| 103 */ | |
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104 extern DECLSPEC SDLMod SDLCALL SDL_GetModState(void); |
| 0 | 105 |
| 106 /* | |
| 107 * Set the current key modifier state | |
| 108 * This does not change the keyboard state, only the key modifier flags. | |
| 109 */ | |
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110 extern DECLSPEC void SDLCALL SDL_SetModState(SDLMod modstate); |
| 0 | 111 |
| 112 /* | |
| 113 * Get the name of an SDL virtual keysym | |
| 114 */ | |
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115 extern DECLSPEC char * SDLCALL SDL_GetKeyName(SDLKey key); |
| 0 | 116 |
| 117 | |
| 118 /* Ends C function definitions when using C++ */ | |
| 119 #ifdef __cplusplus | |
| 120 } | |
| 121 #endif | |
| 122 #include "close_code.h" | |
| 123 | |
| 124 #endif /* _SDL_keyboard_h */ |