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comparison src/joystick/bsd/SDL_sysjoystick.c @ 461:1d36f593078a

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Date: Thu, 18 Jul 2002 23:51:40 +0200 (MEST) From: Krister Walfridsson Subject: [SDL] src/joystick/bsd/SDL_sysjoystick.c patch The *BSD USB HID joystick code has two serious bugs: 1. If a joystick reports unhandled hid_input usage (for example HUG_RZ or HUG_DIAL), then the last handled value will be overwritten with an arbitrary value. (Fixed in the patch below by adding a default case.) 2. The current code does only handle logical coordinates in the range 0-255, while a big part of available joysticks report -128 - 127. (This is solved in the patch below by first center the range around 0, and then stretch it to the correct range.)
author Sam Lantinga <slouken@libsdl.org>
date Tue, 20 Aug 2002 06:08:42 +0000
parents 33712e5d1ec8
children 2ee72e47ca08
comparison
equal deleted inserted replaced
460:a888b3ae31ff 461:1d36f593078a
330 naxe = JOYAXE_SLIDER; 330 naxe = JOYAXE_SLIDER;
331 goto scaleaxe; 331 goto scaleaxe;
332 case HUG_WHEEL: 332 case HUG_WHEEL:
333 naxe = JOYAXE_WHEEL; 333 naxe = JOYAXE_WHEEL;
334 goto scaleaxe; 334 goto scaleaxe;
335 default:
336 continue;
335 } 337 }
336 scaleaxe: 338 scaleaxe:
337 v = (Sint32)hid_get_data(REP_BUF_DATA(rep), 339 v = (Sint32)hid_get_data(REP_BUF_DATA(rep),
338 &hitem); 340 &hitem);
339 if (v != 127) { 341 v -= (hitem.logical_maximum + hitem.logical_minimum + 1)/2;
340 if (v < 127) { 342 v *= 32768/((hitem.logical_maximum - hitem.logical_minimum + 1)/2);
341 v = -(256 - v);
342 v <<= 7;
343 v++;
344 } else {
345 v++;
346 v <<= 7;
347 v--;
348 }
349 } else {
350 v = 0;
351 }
352 if (v != joy->axes[naxe]) { 343 if (v != joy->axes[naxe]) {
353 SDL_PrivateJoystickAxis(joy, naxe, v); 344 SDL_PrivateJoystickAxis(joy, naxe, v);
354 } 345 }
355 break; 346 break;
356 case HUP_BUTTON: 347 case HUP_BUTTON: