This repository has been archived by the owner on Feb 11, 2021. It is now read-only.
touchTest.c
1
2
3
#include <stdio.h>
#include <SDL.h>
#include <math.h>
4
#include <SDL_touch.h>
5
6
7
8
9
10
11
#define PI 3.1415926535897
#define WIDTH 640
#define HEIGHT 480
#define BPP 4
#define DEPTH 32
12
13
#define MAXFINGERS 3
14
15
16
17
18
19
20
21
int mousx,mousy;
int keystat[512];
int bstatus;
typedef struct {
23
24
} Point;
25
26
typedef struct {
Point p;
27
float pressure;
28
29
} Finger;
31
Finger finger[MAXFINGERS];
33
34
void handler (int sig)
{
35
printf ("\exiting...(%d)\n", sig);
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
exit (0);
}
void perror_exit (char *error)
{
perror (error);
handler (9);
}
void setpix(SDL_Surface *screen, int x, int y, int col)
{
Uint32 *pixmem32;
Uint32 colour;
if((unsigned)x > screen->w) return;
if((unsigned)y > screen->h) return;
colour = SDL_MapRGB( screen->format, (col>>16)&0xFF, (col>>8)&0xFF, col&0xFF);
pixmem32 = (Uint32*) screen->pixels + y*screen->pitch/BPP + x;
*pixmem32 = colour;
}
void drawCircle(SDL_Surface* screen,int x,int y,int r,int c)
{
float a;
64
65
int tx;
for(a=0;a<PI/2;a+=1.f/(float)abs(r))
67
68
69
70
71
72
73
74
if(r > 0) { //r<0 ==> unfilled circle
for(tx=x-r*cos(a);tx<x+r*cos(a);tx++) {
setpix(screen,tx,(int)(y+r*sin(a)),c);
setpix(screen,tx,(int)(y-r*sin(a)),c);
}
}
//Always Draw Outline
75
setpix(screen,(int)(x+r*cos(a)),(int)(y+r*sin(a)),c);
76
77
78
setpix(screen,(int)(x-r*cos(a)),(int)(y+r*sin(a)),c);
setpix(screen,(int)(x+r*cos(a)),(int)(y-r*sin(a)),c);
setpix(screen,(int)(x-r*cos(a)),(int)(y-r*sin(a)),c);
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
}
}
void DrawScreen(SDL_Surface* screen, int h)
{
int x, y, xm,ym,c;
if(SDL_MUSTLOCK(screen))
{
if(SDL_LockSurface(screen) < 0) return;
}
for(y = 0; y < screen->h; y++ )
{
for( x = 0; x < screen->w; x++ )
{
//setpixel(screen, x, y, (x*x)/256+3*y+h, (y*y)/256+x+h, h);
//xm = (x+h)%screen->w;
//ym = (y+h)%screen->w;
//c = sin(h/256*2*PI)*x*y/screen->w/screen->h;
//setpix(screen,x,y,255*sin(xm/screen->w*2*PI),sin(h/255*2*PI)*255*y/screen->h,c);
setpix(screen,x,y,((x%255)<<16) + ((y%255)<<8) + (x+y)%255);
}
}
101
drawCircle(screen,mousx,mousy,-30,0xFFFFFF);
103
104
int i;
for(i=0;i<MAXFINGERS;i++)
105
if(finger[i].p.x >= 0 && finger[i].p.y >= 0)
106
107
108
109
110
111
if(finger[i].pressure > 0)
drawCircle(screen,finger[i].p.x*screen->w,finger[i].p.y*screen->h
,20,0xFF*finger[i].pressure);
else
drawCircle(screen,finger[i].p.x*screen->w,finger[i].p.y*screen->h
,20,0xFF);
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
if(SDL_MUSTLOCK(screen)) SDL_UnlockSurface(screen);
SDL_Flip(screen);
}
SDL_Surface* initScreen(int width,int height)
{
return SDL_SetVideoMode(width, height, DEPTH,
SDL_HWSURFACE | SDL_RESIZABLE);
}
int main(int argc, char* argv[])
{
SDL_Surface *screen;
SDL_Event event;
int keypress = 0;
int h=0,s=1,i,j;
memset(keystat,0,512*sizeof(keystat[0]));
if (SDL_Init(SDL_INIT_VIDEO) < 0 ) return 1;
if (!(screen = initScreen(WIDTH,HEIGHT)))
{
SDL_Quit();
return 1;
}
while(!keystat[27]) {
//Poll SDL
while(SDL_PollEvent(&event))
{
switch (event.type)
{
case SDL_QUIT:
keystat[27] = 1;
break;
case SDL_KEYDOWN:
//printf("%i\n",event.key.keysym.sym);
keystat[event.key.keysym.sym] = 1;
//keypress = 1;
break;
case SDL_KEYUP:
//printf("%i\n",event.key.keysym.sym);
keystat[event.key.keysym.sym] = 0;
//keypress = 1;
break;
case SDL_VIDEORESIZE:
if (!(screen = initScreen(event.resize.w,
event.resize.h)))
{
SDL_Quit();
return 1;
}
break;
case SDL_MOUSEMOTION:
mousx = event.motion.x;
mousy = event.motion.y;
break;
case SDL_MOUSEBUTTONDOWN:
bstatus |= (1<<(event.button.button-1));
break;
case SDL_MOUSEBUTTONUP:
bstatus &= ~(1<<(event.button.button-1));
break;
178
case SDL_FINGERMOTION:
180
181
//printf("Finger: %i,x: %i, y: %i\n",event.tfinger.fingerId,
// event.tfinger.x,event.tfinger.y);
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
SDL_Touch* inTouch = SDL_GetTouch(event.tfinger.touchId);
SDL_Finger* inFinger = SDL_GetFinger(inTouch,event.tfinger.fingerId);
finger[event.tfinger.fingerId].p.x = ((float)event.tfinger.x)/
inTouch->xres;
finger[event.tfinger.fingerId].p.y = ((float)event.tfinger.y)/
inTouch->yres;
finger[event.tfinger.fingerId].pressure =
((float)event.tfinger.pressure)/inTouch->pressureres;
printf("Finger: %i, Pressure: %f Pressureres: %i\n",
event.tfinger.fingerId,
finger[event.tfinger.fingerId].pressure,
inTouch->pressureres);
//printf("Finger: %i, pressure: %f\n",event.tfinger.fingerId,
// finger[event.tfinger.fingerId].pressure);
202
203
204
case SDL_FINGERDOWN:
printf("Figner: %i down - x: %i, y: %i\n",event.tfinger.fingerId,
event.tfinger.x,event.tfinger.y);
205
206
finger[event.tfinger.fingerId].p.x = event.tfinger.x;
finger[event.tfinger.fingerId].p.y = event.tfinger.y;
207
208
209
210
break;
case SDL_FINGERUP:
printf("Figner: %i up - x: %i, y: %i\n",event.tfinger.fingerId,
event.tfinger.x,event.tfinger.y);
211
212
finger[event.tfinger.fingerId].p.x = -1;
finger[event.tfinger.fingerId].p.y = -1;
214
215
216
217
218
219
220
221
222
223
224
225
226
227
}
}
//And draw
DrawScreen(screen,h);
/*
for(i=0;i<512;i++)
if(keystat[i]) printf("%i\n",i);
printf("Buttons:%i\n",bstatus);
*/
}
SDL_Quit();
return 0;
}