This repository has been archived by the owner on Feb 11, 2021. It is now read-only.
touchTest.c
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#include <stdio.h>
#include <SDL.h>
#include <math.h>
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#include <SDL_touch.h>
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#define PI 3.1415926535897
#define WIDTH 640
#define HEIGHT 480
#define BPP 4
#define DEPTH 32
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#define MAXFINGERS 3
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int mousx,mousy;
int keystat[512];
int bstatus;
typedef struct {
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} Point;
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typedef struct {
Point p;
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float pressure;
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} Finger;
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Finger finger[MAXFINGERS];
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void handler (int sig)
{
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printf ("exiting...(%d)\n", sig);
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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;
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int tx;
for(a=0;a<PI/2;a+=1.f/(float)abs(r))
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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
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setpix(screen,(int)(x+r*cos(a)),(int)(y+r*sin(a)),c);
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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);
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}
}
void DrawScreen(SDL_Surface* screen, int h)
{
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int x, y, xm,ym,c,i;
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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);
}
}
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drawCircle(screen,mousx,mousy,-30,0xFFFFFF);
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for(i=0;i<MAXFINGERS;i++)
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if(finger[i].p.x >= 0 && finger[i].p.y >= 0)
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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);
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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;
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screen = initScreen(WIDTH,HEIGHT);
if (!screen)
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{
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;
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case SDL_FINGERMOTION:
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//printf("Finger: %i,x: %i, y: %i\n",event.tfinger.fingerId,
// event.tfinger.x,event.tfinger.y);
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//SDL_Touch *inTouch = SDL_GetTouch(event.tfinger.touchId);
//SDL_Finger *inFinger = SDL_GetFinger(inTouch,event.tfinger.fingerId);
/*
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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 =
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((float)event.tfinger.pressure)/inTouch->pressureres;*/
/*
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printf("Finger: %i, Pressure: %f Pressureres: %i\n",
event.tfinger.fingerId,
finger[event.tfinger.fingerId].pressure,
inTouch->pressureres);
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//printf("Finger: %i, pressure: %f\n",event.tfinger.fingerId,
// finger[event.tfinger.fingerId].pressure);
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case SDL_FINGERDOWN:
printf("Figner: %i down - x: %i, y: %i\n",event.tfinger.fingerId,
event.tfinger.x,event.tfinger.y);
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finger[event.tfinger.fingerId].p.x = event.tfinger.x;
finger[event.tfinger.fingerId].p.y = event.tfinger.y;
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break;
case SDL_FINGERUP:
printf("Figner: %i up - x: %i, y: %i\n",event.tfinger.fingerId,
event.tfinger.x,event.tfinger.y);
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finger[event.tfinger.fingerId].p.x = -1;
finger[event.tfinger.fingerId].p.y = -1;
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}
}
//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;
}