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comparison touchTest/touchSimp.c @ 4639:f5cd4b6231ba

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Added Test Directory. Touch input works in touchSimp for wacom bamboo fun on Ubuntu linux. Not yet integrated into library. Should support other touch devices and other linux distros, but not tested on anything else.
author Jim Grandpre <jim.tla@gmail.com>
date Mon, 24 May 2010 23:44:24 -0400
parents
children f068a6dfc858
comparison
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4464:fa77a6429698 4639:f5cd4b6231ba
1 #include <stdio.h>
2 #include <SDL.h>
3 #include <math.h>
4 #include <linux/input.h>
5 #include <fcntl.h>
6
7
8 #define PI 3.1415926535897
9 #define WIDTH 640
10 #define HEIGHT 480
11 #define BPP 4
12 #define DEPTH 32
13
14
15 #define MAX_FINGERS 2
16
17 int mousx,mousy;
18 int keystat[512];
19 int bstatus;
20
21
22
23 typedef struct {
24 int x,y;
25 } Point;
26
27 Point finger[MAX_FINGERS];
28
29 void handler (int sig)
30 {
31 printf ("\nexiting...(%d)\n", sig);
32 exit (0);
33 }
34
35 void perror_exit (char *error)
36 {
37 perror (error);
38 handler (9);
39 }
40
41
42 void setpix(SDL_Surface *screen, int x, int y, int col)
43 {
44 Uint32 *pixmem32;
45 Uint32 colour;
46
47 if((unsigned)x > screen->w) return;
48 if((unsigned)y > screen->h) return;
49
50 colour = SDL_MapRGB( screen->format, (col>>16)&0xFF, (col>>8)&0xFF, col&0xFF);
51
52 pixmem32 = (Uint32*) screen->pixels + y*screen->pitch/BPP + x;
53 *pixmem32 = colour;
54 }
55
56 void drawCircle(SDL_Surface* screen,int x,int y,int r,int c)
57 {
58
59 float a;
60 for(a=0;a<2*PI;a+=1.f/(float)r)
61 {
62 setpix(screen,(int)(x+r*cos(a)),(int)(y+r*sin(a)),c);
63 }
64 }
65
66 void DrawScreen(SDL_Surface* screen, int h)
67 {
68 int x, y, xm,ym,c;
69 if(SDL_MUSTLOCK(screen))
70 {
71 if(SDL_LockSurface(screen) < 0) return;
72 }
73 for(y = 0; y < screen->h; y++ )
74 {
75 for( x = 0; x < screen->w; x++ )
76 {
77 //setpixel(screen, x, y, (x*x)/256+3*y+h, (y*y)/256+x+h, h);
78 //xm = (x+h)%screen->w;
79 //ym = (y+h)%screen->w;
80 //c = sin(h/256*2*PI)*x*y/screen->w/screen->h;
81 //setpix(screen,x,y,255*sin(xm/screen->w*2*PI),sin(h/255*2*PI)*255*y/screen->h,c);
82 setpix(screen,x,y,((x%255)<<16) + ((y%255)<<8) + (x+y)%255);
83 }
84 }
85 drawCircle(screen,mousx,mousy,30,0xFFFFFF);
86 int i;
87 for(i=0;i<MAX_FINGERS;i++)
88 drawCircle(screen,finger[i].x,finger[i].y,30,0xFFFFFF);
89
90 if(SDL_MUSTLOCK(screen)) SDL_UnlockSurface(screen);
91
92 SDL_Flip(screen);
93 }
94
95 SDL_Surface* initScreen(int width,int height)
96 {
97 return SDL_SetVideoMode(width, height, DEPTH,
98 SDL_HWSURFACE | SDL_RESIZABLE);
99 }
100
101 int main(int argc, char* argv[])
102 {
103 struct input_event ev[64];
104 int fd, rd, value, size = sizeof (struct input_event);
105 char name[256] = "Unknown";
106 char *device = NULL;
107
108
109
110 //Setup check
111 if (argv[1] == NULL){
112 printf("Please specify (on the command line) the path to the dev event interface device\n");
113 exit (0);
114 }
115
116 if ((getuid ()) != 0)
117 printf ("You are not root! This may not work...\n");
118
119 if (argc > 1)
120 device = argv[1];
121
122 //Open Device
123 if ((fd = open (device, O_RDONLY)) == -1)
124 printf ("%s is not a vaild device.\n", device);
125
126 //Print Device Name
127 ioctl (fd, EVIOCGNAME (sizeof (name)), name);
128 printf ("Reading From : %s (%s)\n", device, name);
129
130
131
132
133
134 SDL_Surface *screen;
135 SDL_Event event;
136
137 int keypress = 0;
138 int h=0,s=1,i,j;
139 int tx,ty,curf=0;
140
141 memset(keystat,0,512*sizeof(keystat[0]));
142 if (SDL_Init(SDL_INIT_VIDEO) < 0 ) return 1;
143
144 if (!(screen = initScreen(WIDTH,HEIGHT)))
145 {
146 SDL_Quit();
147 return 1;
148 }
149
150 while(!keystat[27])
151 {
152 //Poll SDL
153 while(SDL_PollEvent(&event))
154 {
155 switch (event.type)
156 {
157 case SDL_QUIT:
158 keystat[27] = 1;
159 break;
160 case SDL_KEYDOWN:
161 //printf("%i\n",event.key.keysym.sym);
162 keystat[event.key.keysym.sym] = 1;
163 //keypress = 1;
164 break;
165 case SDL_KEYUP:
166 //printf("%i\n",event.key.keysym.sym);
167 keystat[event.key.keysym.sym] = 0;
168 //keypress = 1;
169 break;
170 case SDL_VIDEORESIZE:
171 if (!(screen = initScreen(event.resize.w,
172 event.resize.h)))
173 {
174 SDL_Quit();
175 return 1;
176 }
177 break;
178 case SDL_MOUSEMOTION:
179 mousx = event.motion.x;
180 mousy = event.motion.y;
181 break;
182 case SDL_MOUSEBUTTONDOWN:
183 bstatus |= (1<<(event.button.button-1));
184 break;
185 case SDL_MOUSEBUTTONUP:
186 bstatus &= ~(1<<(event.button.button-1));
187 break;
188 }
189 }
190
191 //poll for Touch <- Goal: make this a case:
192 if ((rd = read (fd, ev, size * 64)) < size)
193 perror_exit ("read()");
194 //printf("time: %i\n type: %X\n code: %X\n value: %i\n ",
195 // ev->time,ev->type,ev->code,ev->value);
196 for (i = 0; i < rd / sizeof(struct input_event); i++)
197 switch (ev[i].type)
198 {
199 case EV_ABS:
200 if(ev[i].code == ABS_X)
201 tx = ev[i].value;
202 else if (ev[i].code == ABS_Y)
203 ty = ev[i].value;
204 else if (ev[i].code == ABS_MISC)
205 {
206 //printf("Misc:type: %X\n code: %X\n value: %i\n ",
207 // ev[i].type,ev[i].code,ev[i].value);
208 }
209 break;
210 case EV_MSC:
211 if(ev[i].code == MSC_SERIAL)
212 curf = ev[i].value;
213 break;
214 case EV_SYN:
215 curf -= 1;
216 if(tx >= 0)
217 finger[curf].x = tx;
218 if(ty >= 0)
219 finger[curf].y = ty;
220
221 //printf("Synched: %i tx: %i, ty: %i\n",curf,finger[curf].x,finger[curf].y);
222 tx = -1;
223 ty = -1;
224 break;
225
226 }
227 //And draw
228 DrawScreen(screen,h);
229 /*
230 for(i=0;i<512;i++)
231 if(keystat[i]) printf("%i\n",i);
232 printf("Buttons:%i\n",bstatus);
233 */
234 }
235 SDL_Quit();
236
237 return 0;
238 }