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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
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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 Point ball,ballv;
142
143 memset(keystat,0,512*sizeof(keystat[0]));
144 if (SDL_Init(SDL_INIT_VIDEO) < 0 ) return 1;
145
146 if (!(screen = initScreen(WIDTH,HEIGHT)))
147 {
148 SDL_Quit();
149 return 1;
150 }
151 ball.x = screen->width()/2;
152 ball.y = screen->height()/2;
153 while(!keystat[27])
154 {
155 //Poll SDL
156 while(SDL_PollEvent(&event))
157 {
158 switch (event.type)
159 {
160 case SDL_QUIT:
161 keystat[27] = 1;
162 break;
163 case SDL_KEYDOWN:
164 //printf("%i\n",event.key.keysym.sym);
165 keystat[event.key.keysym.sym] = 1;
166 //keypress = 1;
167 break;
168 case SDL_KEYUP:
169 //printf("%i\n",event.key.keysym.sym);
170 keystat[event.key.keysym.sym] = 0;
171 //keypress = 1;
172 break;
173 case SDL_VIDEORESIZE:
174 if (!(screen = initScreen(event.resize.w,
175 event.resize.h)))
176 {
177 SDL_Quit();
178 return 1;
179 }
180 break;
181 case SDL_MOUSEMOTION:
182 mousx = event.motion.x;
183 mousy = event.motion.y;
184 break;
185 case SDL_MOUSEBUTTONDOWN:
186 bstatus |= (1<<(event.button.button-1));
187 break;
188 case SDL_MOUSEBUTTONUP:
189 bstatus &= ~(1<<(event.button.button-1));
190 break;
191 }
192 }
193
194 //poll for Touch <- Goal: make this a case:
195 if ((rd = read (fd, ev, size * 64)) < size)
196 perror_exit ("read()");
197 //printf("time: %i\n type: %X\n code: %X\n value: %i\n ",
198 // ev->time,ev->type,ev->code,ev->value);
199 for (i = 0; i < rd / sizeof(struct input_event); i++)
200 switch (ev[i].type)
201 {
202 case EV_ABS:
203 if(ev[i].code == ABS_X)
204 tx = ev[i].value;
205 else if (ev[i].code == ABS_Y)
206 ty = ev[i].value;
207 else if (ev[i].code == ABS_MISC)
208 {
209 //printf("Misc:type: %X\n code: %X\n value: %i\n ",
210 // ev[i].type,ev[i].code,ev[i].value);
211 }
212 break;
213 case EV_MSC:
214 if(ev[i].code == MSC_SERIAL)
215 curf = ev[i].value;
216 break;
217 case EV_SYN:
218 curf -= 1;
219 if(tx >= 0)
220 finger[curf].x = tx;
221 if(ty >= 0)
222 finger[curf].y = ty;
223
224 //printf("Synched: %i tx: %i, ty: %i\n",curf,finger[curf].x,finger[curf].y);
225 tx = -1;
226 ty = -1;
227 break;
228
229 }
230 //And draw
231 DrawScreen(screen,h);
232 /*
233 for(i=0;i<512;i++)
234 if(keystat[i]) printf("%i\n",i);
235 printf("Buttons:%i\n",bstatus);
236 */
237 }
238 SDL_Quit();
239
240 return 0;
241 }