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annotate mde/input/joystick.d @ 85:56c0ddd90193

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Intermediate commit (not stable). Changes to init system.
author Diggory Hardy <diggory.hardy@gmail.com>
date Thu, 11 Sep 2008 11:33:51 +0100
parents 108d123238c0
children 79d816b3e2d2
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5f90774ea1ef Applied the GNU GPL v2 to mde.
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1 /* LICENSE BLOCK
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2 Part of mde: a Modular D game-oriented Engine
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3 Copyright © 2007-2008 Diggory Hardy
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5 This program is free software: you can redistribute it and/or modify it under the terms
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6 of the GNU General Public License as published by the Free Software Foundation, either
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7 version 2 of the License, or (at your option) any later version.
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8
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9 This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
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10 without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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11 See the GNU General Public License for more details.
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13 You should have received a copy of the GNU General Public License
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14 along with this program. If not, see <http://www.gnu.org/licenses/>. */
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16 /** Opens SDL joysticks ready for use.
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17 * May be extended later to include other input devices and remap devices as per config.
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18 */
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19 module mde.input.joystick;
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21 import mde.setup.exception; // InitStage
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22 import tango.util.log.Log : Log, Logger;
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24 import derelict.sdl.joystick;
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26 private Logger logger;
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27 static this() {
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28 logger = Log.getLogger ("mde.input.joystick");
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29 }
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30 private SDL_Joystick*[] joysticks; // pointers to all joystick structs, whether successfully opened or not
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32 /** Open joysticks ready for use.
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33 *
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34 * This is simply required for SDL to handle joystick events. It can fail, but won't affect anything
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35 * else, except for the controller not working.
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36 *
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37 * closeJoysticks must be run to cleanup afterwards.
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38 */
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39 StageState openJoysticks () {
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40 joysticks = new SDL_Joystick*[SDL_NumJoysticks ()];
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42 for (int i = 0; i < joysticks.length; ++i) {
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43 if ((joysticks[i] = SDL_JoystickOpen (i)) is null) { // null on failure
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44 logger.error ("Unable to open joystick {} via SDL", i);
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45 return StageState.ERROR; // prevent closeJoysticks running, but don't halt program
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46 }
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47 }
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49 logger.info ("Opened {} joysticks via SDL, succesfully unless preceding errors say otherwise.", joysticks.length);
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50 return StageState.ACTIVE;
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51 }
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53 /// Cleanup fct.
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54 StageState closeJoysticks () {
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55 foreach (js; joysticks) {
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56 // FIXME: This sometimes causes a SIGSEGV (Address boundary error) when init fails.
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57 debug logger.trace ("Closing joysticks (this sometimes fails when mde exits prematurely)");
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58 if(js !is null) SDL_JoystickClose(js); // only close if successfully opened
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59 debug logger.trace ("Done closing joysticks");
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60 }
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61 return StageState.INACTIVE;
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62 }