Mercurial > sdl-ios-xcode
annotate include/SDL_joystick.h @ 4168:69bcba65c388 SDL-1.2
Fixed bug #526
Comment #1 From Simon Howard 2009-03-20 16:50:56
Hi,
I'm the author of Chocolate Doom, one of the other source ports that James
mentioned. This is a patch against the current SVN version of SDL 1.2 that
fixes the bug. It has been tested and hopefully should be obviously correct
from examining the changes. I'll give a brief explanation.
When the palette is set with SDL_SetPalette, the IDirectDrawPalette_SetEntries
DirectX function is invoked. However, when this happens, a WM_PALETTECHANGED
message is sent to the window.
A WM_PALETTECHANGED message can also be received if the palette is changed for
some other reason, like if the system palette is changed. Therefore, the
palette change handler (DX5_PaletteChanged) has code to deal with this case.
It distinguishes "expected" palette changes (set with SDL_SetPalette) from
"unexpected" palette changes using the colorchange_expected variable, which is
set before calling IDirectDrawPalette_SetEntries. However, the code to set
this variable is missing in the fullscreen code path. By setting this
variable, the palette change is handled properly and the freezes go away.
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Mon, 13 Apr 2009 00:53:12 +0000 |
| parents | a1b03ba2fcd0 |
| children | 4c4113c2162c |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 SDL - Simple DirectMedia Layer | |
| 4159 | 3 Copyright (C) 1997-2009 Sam Lantinga |
| 0 | 4 |
| 5 This library is free software; you can redistribute it and/or | |
|
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6 modify it under the terms of the GNU Lesser General Public |
| 0 | 7 License as published by the Free Software Foundation; either |
|
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8 version 2.1 of the License, or (at your option) any later version. |
| 0 | 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 | |
|
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13 Lesser General Public License for more details. |
| 0 | 14 |
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15 You should have received a copy of the GNU Lesser General Public |
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16 License along with this library; if not, write to the Free Software |
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17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| 0 | 18 |
| 19 Sam Lantinga | |
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20 slouken@libsdl.org |
| 0 | 21 */ |
| 22 | |
| 23 /* Include file for SDL joystick event handling */ | |
| 24 | |
| 25 #ifndef _SDL_joystick_h | |
| 26 #define _SDL_joystick_h | |
| 27 | |
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28 #include "SDL_stdinc.h" |
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More header massaging... works great on Windows. ;-)
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29 #include "SDL_error.h" |
| 0 | 30 |
| 31 #include "begin_code.h" | |
| 32 /* Set up for C function definitions, even when using C++ */ | |
| 33 #ifdef __cplusplus | |
| 34 extern "C" { | |
| 35 #endif | |
| 36 | |
| 37 /* In order to use these functions, SDL_Init() must have been called | |
| 38 with the SDL_INIT_JOYSTICK flag. This causes SDL to scan the system | |
| 39 for joysticks, and load appropriate drivers. | |
| 40 */ | |
| 41 | |
| 42 /* The joystick structure used to identify an SDL joystick */ | |
| 43 struct _SDL_Joystick; | |
| 44 typedef struct _SDL_Joystick SDL_Joystick; | |
| 45 | |
| 46 | |
| 47 /* Function prototypes */ | |
| 48 /* | |
| 49 * Count the number of joysticks attached to the system | |
| 50 */ | |
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51 extern DECLSPEC int SDLCALL SDL_NumJoysticks(void); |
| 0 | 52 |
| 53 /* | |
| 54 * Get the implementation dependent name of a joystick. | |
| 55 * This can be called before any joysticks are opened. | |
| 56 * If no name can be found, this function returns NULL. | |
| 57 */ | |
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58 extern DECLSPEC const char * SDLCALL SDL_JoystickName(int device_index); |
| 0 | 59 |
| 60 /* | |
| 61 * Open a joystick for use - the index passed as an argument refers to | |
| 62 * the N'th joystick on the system. This index is the value which will | |
| 63 * identify this joystick in future joystick events. | |
| 64 * | |
| 65 * This function returns a joystick identifier, or NULL if an error occurred. | |
| 66 */ | |
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67 extern DECLSPEC SDL_Joystick * SDLCALL SDL_JoystickOpen(int device_index); |
| 0 | 68 |
| 69 /* | |
| 70 * Returns 1 if the joystick has been opened, or 0 if it has not. | |
| 71 */ | |
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72 extern DECLSPEC int SDLCALL SDL_JoystickOpened(int device_index); |
| 0 | 73 |
| 74 /* | |
| 75 * Get the device index of an opened joystick. | |
| 76 */ | |
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77 extern DECLSPEC int SDLCALL SDL_JoystickIndex(SDL_Joystick *joystick); |
| 0 | 78 |
| 79 /* | |
| 80 * Get the number of general axis controls on a joystick | |
| 81 */ | |
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82 extern DECLSPEC int SDLCALL SDL_JoystickNumAxes(SDL_Joystick *joystick); |
| 0 | 83 |
| 84 /* | |
| 85 * Get the number of trackballs on a joystick | |
| 86 * Joystick trackballs have only relative motion events associated | |
| 87 * with them and their state cannot be polled. | |
| 88 */ | |
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89 extern DECLSPEC int SDLCALL SDL_JoystickNumBalls(SDL_Joystick *joystick); |
| 0 | 90 |
| 91 /* | |
| 92 * Get the number of POV hats on a joystick | |
| 93 */ | |
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94 extern DECLSPEC int SDLCALL SDL_JoystickNumHats(SDL_Joystick *joystick); |
| 0 | 95 |
| 96 /* | |
| 97 * Get the number of buttons on a joystick | |
| 98 */ | |
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99 extern DECLSPEC int SDLCALL SDL_JoystickNumButtons(SDL_Joystick *joystick); |
| 0 | 100 |
| 101 /* | |
| 102 * Update the current state of the open joysticks. | |
| 103 * This is called automatically by the event loop if any joystick | |
| 104 * events are enabled. | |
| 105 */ | |
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106 extern DECLSPEC void SDLCALL SDL_JoystickUpdate(void); |
| 0 | 107 |
| 108 /* | |
| 109 * Enable/disable joystick event polling. | |
| 110 * If joystick events are disabled, you must call SDL_JoystickUpdate() | |
| 111 * yourself and check the state of the joystick when you want joystick | |
| 112 * information. | |
| 113 * The state can be one of SDL_QUERY, SDL_ENABLE or SDL_IGNORE. | |
| 114 */ | |
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115 extern DECLSPEC int SDLCALL SDL_JoystickEventState(int state); |
| 0 | 116 |
| 117 /* | |
| 118 * Get the current state of an axis control on a joystick | |
| 119 * The state is a value ranging from -32768 to 32767. | |
| 120 * The axis indices start at index 0. | |
| 121 */ | |
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122 extern DECLSPEC Sint16 SDLCALL SDL_JoystickGetAxis(SDL_Joystick *joystick, int axis); |
| 0 | 123 |
| 124 /* | |
| 125 * Get the current state of a POV hat on a joystick | |
| 126 * The return value is one of the following positions: | |
| 127 */ | |
| 128 #define SDL_HAT_CENTERED 0x00 | |
| 129 #define SDL_HAT_UP 0x01 | |
| 130 #define SDL_HAT_RIGHT 0x02 | |
| 131 #define SDL_HAT_DOWN 0x04 | |
| 132 #define SDL_HAT_LEFT 0x08 | |
| 133 #define SDL_HAT_RIGHTUP (SDL_HAT_RIGHT|SDL_HAT_UP) | |
| 134 #define SDL_HAT_RIGHTDOWN (SDL_HAT_RIGHT|SDL_HAT_DOWN) | |
| 135 #define SDL_HAT_LEFTUP (SDL_HAT_LEFT|SDL_HAT_UP) | |
| 136 #define SDL_HAT_LEFTDOWN (SDL_HAT_LEFT|SDL_HAT_DOWN) | |
| 137 /* | |
| 138 * The hat indices start at index 0. | |
| 139 */ | |
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140 extern DECLSPEC Uint8 SDLCALL SDL_JoystickGetHat(SDL_Joystick *joystick, int hat); |
| 0 | 141 |
| 142 /* | |
| 143 * Get the ball axis change since the last poll | |
| 144 * This returns 0, or -1 if you passed it invalid parameters. | |
| 145 * The ball indices start at index 0. | |
| 146 */ | |
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147 extern DECLSPEC int SDLCALL SDL_JoystickGetBall(SDL_Joystick *joystick, int ball, int *dx, int *dy); |
| 0 | 148 |
| 149 /* | |
| 150 * Get the current state of a button on a joystick | |
| 151 * The button indices start at index 0. | |
| 152 */ | |
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153 extern DECLSPEC Uint8 SDLCALL SDL_JoystickGetButton(SDL_Joystick *joystick, int button); |
| 0 | 154 |
| 155 /* | |
| 156 * Close a joystick previously opened with SDL_JoystickOpen() | |
| 157 */ | |
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158 extern DECLSPEC void SDLCALL SDL_JoystickClose(SDL_Joystick *joystick); |
| 0 | 159 |
| 160 | |
| 161 /* Ends C function definitions when using C++ */ | |
| 162 #ifdef __cplusplus | |
| 163 } | |
| 164 #endif | |
| 165 #include "close_code.h" | |
| 166 | |
| 167 #endif /* _SDL_joystick_h */ |