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annotate src/loadso/dlopen/SDL_sysloadso.c @ 1584:b786d9c15e42

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Fixed bug #61 Date: Mon, 24 Feb 2003 13:35:11 +0800 From: "Leonidas" Subject: [SDL] Re: Trigger mouse wheel event -- not in X-environment I have looked into the codes for the IMPS/2 mouse wheel mode of fbcon driver. But I found something weird. Here's the original codes to set a mouse device into IMPS/2 mode in libSDL. In the file src/video/fbcon/SDL_fbevents.c In function static int set_imps2_mode(int fd) ... Uint8 set_imps2[] = {0xf3, 200, 0xf3, 100, 0xf3, 80}; Uint8 reset = 0xff; fd_set fdset; struct timeval tv; int retval = 0; // Set mouse device fd into IMPS/2 mode if ( write(fd, &set_imps2, sizeof(set_imps2)) == sizeof(set_imps2) ) { // ??? then RESET it..??? if (write(fd, &reset, sizeof (reset)) == sizeof (reset) ) { retval = 1; } } ........... Since it sets IMPS/2 mode then reset it, so you will never get a mouse into IMPS/2 mode to use its wheel. What I did to make the wheel usable is remove the RESET codes. .... if ( write(fd, &set_imps2, sizeof(set_imps2)) == sizeof(set_imps2) ) { /* if (write(fd, &reset, sizeof (reset)) == sizeof (reset) ) { } */ retval = 1; } .... And in FB_OpenMouse(_THIS) Make the device /dev/psaux to be setted into imps2 mode such that it can be detected its a imps/2 mouse or not. (my mouse device is on ps2, but the codes only set /dev/input/mice device originally) Then I have done, I can use the mouse wheel when SDL uses frame buff driver. I dont exactly know I did right or wrong, I just change it for my usuage. Correct me please, if I did something wrong. Best regards, Li Tsung Lin IAP Product Dept. Engineer EeRise Corp. (Image Processing System, Computer Vision System) Hsin Tien, Taipei Hsien, Taiwan, R.O.C.
author Sam Lantinga <slouken@libsdl.org>
date Wed, 22 Mar 2006 07:22:40 +0000
parents d910939febfa
children 92947e3a18db
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2006 Sam Lantinga
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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 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
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25 /* System dependent library loading routines */
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26
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27 #include <stdio.h>
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28 #include <dlfcn.h>
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29
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30 #include "SDL_loadso.h"
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31
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32 void *SDL_LoadObject(const char *sofile)
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33 {
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34 void *handle = dlopen(sofile, RTLD_NOW);
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35 const char *loaderror = (char *)dlerror();
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36 if ( handle == NULL ) {
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37 SDL_SetError("Failed loading %s: %s", sofile, loaderror);
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38 }
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39 return(handle);
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40 }
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41
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42 void *SDL_LoadFunction(void *handle, const char *name)
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43 {
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44 void *symbol = dlsym(handle, name);
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45 if ( symbol == NULL ) {
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46 size_t len = 1+SDL_strlen(name)+1;
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47 char *_name = SDL_stack_alloc(char, len);
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48 _name[0] = '_';
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49 SDL_strlcpy(&_name[1], name, len);
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50 symbol = dlsym(handle, name);
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51 SDL_stack_free(_name);
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52 if ( symbol == NULL ) {
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53 SDL_SetError("Failed loading %s: %s", name, (const char *)dlerror());
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54 }
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55 }
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56 return(symbol);
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57 }
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58
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59 void SDL_UnloadObject(void *handle)
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60 {
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61 if ( handle != NULL ) {
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62 dlclose(handle);
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63 }
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64 }
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65