annotate src/joystick/iphoneos/SDL_sysjoystick.m @ 5221:16d5e8e90e01

Updated testoverlay2 to use the SDL 2D rendering API
author Sam Lantinga <slouken@libsdl.org>
date Mon, 07 Feb 2011 00:46:43 -0800
parents 99210400e8b9
children b530ef003506
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2009 Sam Lantinga
2765
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4
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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
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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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18
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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 #include "../SDL_sysjoystick.h"
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28 #include "../SDL_joystick_c.h"
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29 #import "SDLUIAccelerationDelegate.h"
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30
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31 const char *accelerometerName = "iPhone accelerometer";
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32
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33 /* Function to scan the system for joysticks.
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34 * This function should set SDL_numjoysticks to the number of available
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35 * joysticks. Joystick 0 should be the system default joystick.
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36 * It should return 0, or -1 on an unrecoverable fatal error.
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37 */
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38 int
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39 SDL_SYS_JoystickInit(void)
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40 {
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41 SDL_numjoysticks = 1;
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42 return (1);
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43 }
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44
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45 /* Function to get the device-dependent name of a joystick */
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46 const char *
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47 SDL_SYS_JoystickName(int index)
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48 {
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49 switch(index) {
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50 case 0:
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51 return accelerometerName;
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52 default:
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53 SDL_SetError("No joystick available with that index");
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54 return NULL;
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55 }
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56 }
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57
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58 /* Function to open a joystick for use.
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59 The joystick to open is specified by the index field of the joystick.
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60 This should fill the nbuttons and naxes fields of the joystick structure.
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61 It returns 0, or -1 if there is an error.
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62 */
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63 int
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64 SDL_SYS_JoystickOpen(SDL_Joystick * joystick)
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65 {
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66 if (joystick->index == 0) {
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67 joystick->naxes = 3;
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68 joystick->nhats = 0;
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69 joystick->nballs = 0;
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70 joystick->nbuttons = 0;
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71 joystick->name = accelerometerName;
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72 [[SDLUIAccelerationDelegate sharedDelegate] startup];
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73 return 0;
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74 }
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75 else {
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76 SDL_SetError("No joystick available with that index");
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77 return (-1);
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78 }
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79
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80 }
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81
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82 /* Function to update the state of a joystick - called as a device poll.
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83 * This function shouldn't update the joystick structure directly,
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84 * but instead should call SDL_PrivateJoystick*() to deliver events
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85 * and update joystick device state.
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86 */
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87 void
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88 SDL_SYS_JoystickUpdate(SDL_Joystick * joystick)
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89 {
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90
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91 Sint16 orientation[3];
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92
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93 if ([[SDLUIAccelerationDelegate sharedDelegate] hasNewData]) {
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94
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95 [[SDLUIAccelerationDelegate sharedDelegate] getLastOrientation: orientation];
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96 [[SDLUIAccelerationDelegate sharedDelegate] setHasNewData: NO];
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97
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98 SDL_PrivateJoystickAxis(joystick, 0, orientation[0]);
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99 SDL_PrivateJoystickAxis(joystick, 1, orientation[1]);
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100 SDL_PrivateJoystickAxis(joystick, 2, orientation[2]);
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101
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102 }
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103
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104 return;
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105 }
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106
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107 /* Function to close a joystick after use */
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108 void
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109 SDL_SYS_JoystickClose(SDL_Joystick * joystick)
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110 {
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111 if (joystick->index == 0 && [[SDLUIAccelerationDelegate sharedDelegate] isRunning]) {
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112 [[SDLUIAccelerationDelegate sharedDelegate] shutdown];
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113 }
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114 SDL_SetError("No joystick open with that index");
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115
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116 return;
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117 }
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118
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119 /* Function to perform any system-specific joystick related cleanup */
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120 void
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121 SDL_SYS_JoystickQuit(void)
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122 {
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123 return;
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124 }
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125 /* vi: set ts=4 sw=4 expandtab: */