annotate src/joystick/SDL_sysjoystick.h @ 2844:70b63882d2ef

The YCbCr texture extension works now that bytes_per_pixel() returns the correct value for YUV textures. Yay! I'm still cheering for Ryan's pixel shader instead, since once it works different shaders can handle all the YUV formats.
author Sam Lantinga <slouken@libsdl.org>
date Sat, 06 Dec 2008 18:37:06 +0000
parents 542c78b6fb12
children 99210400e8b9
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2006 Sam Lantinga
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4
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5 This library is SDL_free software; you can redistribute it and/or
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6 modify it under the terms of the GNU Lesser General Public
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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.
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9
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10 This library is distributed in the hope that it will be useful,
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 Lesser General Public License for more details.
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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
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19 Sam Lantinga
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20 slouken@libsdl.org
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21 */
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22 #include "SDL_config.h"
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23
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24 /* This is the system specific header for the SDL joystick API */
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25
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26 #include "SDL_joystick.h"
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27
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28 /* The SDL joystick structure */
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29 struct _SDL_Joystick
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30 {
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31 Uint8 index; /* Device index */
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32 const char *name; /* Joystick name - system dependent */
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33
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34 int naxes; /* Number of axis controls on the joystick */
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35 Sint16 *axes; /* Current axis states */
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36
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37 int nhats; /* Number of hats on the joystick */
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38 Uint8 *hats; /* Current hat states */
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39
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40 int nballs; /* Number of trackballs on the joystick */
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41 struct balldelta
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42 {
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43 int dx;
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44 int dy;
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45 } *balls; /* Current ball motion deltas */
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46
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47 int nbuttons; /* Number of buttons on the joystick */
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48 Uint8 *buttons; /* Current button states */
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49
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50 struct joystick_hwdata *hwdata; /* Driver dependent information */
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51
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52 int ref_count; /* Reference count for multiple opens */
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53 };
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54
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55 /* Function to scan the system for joysticks.
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56 * Joystick 0 should be the system default joystick.
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57 * This function should return the number of available joysticks, or -1
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58 * on an unrecoverable fatal error.
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59 */
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60 extern int SDL_SYS_JoystickInit(void);
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61
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62 /* Function to get the device-dependent name of a joystick */
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63 extern const char *SDL_SYS_JoystickName(int index);
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64
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65 /* Function to open a joystick for use.
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66 The joystick to open is specified by the index field of the joystick.
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67 This should fill the nbuttons and naxes fields of the joystick structure.
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68 It returns 0, or -1 if there is an error.
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69 */
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70 extern int SDL_SYS_JoystickOpen(SDL_Joystick * joystick);
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71
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72 /* Function to update the state of a joystick - called as a device poll.
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73 * This function shouldn't update the joystick structure directly,
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74 * but instead should call SDL_PrivateJoystick*() to deliver events
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75 * and update joystick device state.
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76 */
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77 extern void SDL_SYS_JoystickUpdate(SDL_Joystick * joystick);
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78
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79 /* Function to close a joystick after use */
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80 extern void SDL_SYS_JoystickClose(SDL_Joystick * joystick);
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81
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82 /* Function to perform any system-specific joystick related cleanup */
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83 extern void SDL_SYS_JoystickQuit(void);
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84
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85 /* vi: set ts=4 sw=4 expandtab: */