--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/testgesture.c	Sun Aug 15 00:36:28 2010 -0400
@@ -0,0 +1,297 @@
+/*  Usage:
+ *  Spacebar to begin recording a gesture on all touches.
+ *  s to save all touches into "./gestureSave"
+ *  l to load all touches from "./gestureSave"
+ */
+
+#include <stdio.h>
+#include <SDL.h>
+#include <math.h>
+#include <SDL_touch.h>
+#include <SDL_gesture.h>
+
+
+/* Make sure we have good macros for printing 32 and 64 bit values */
+#ifndef PRIs32
+#define PRIs32 "d"
+#endif
+#ifndef PRIu32
+#define PRIu32 "u"
+#endif
+#ifndef PRIs64
+#ifdef __WIN32__
+#define PRIs64 "I64"
+#else
+#define PRIs64 "lld"
+#endif
+#endif
+#ifndef PRIu64
+#ifdef __WIN32__
+#define PRIu64 "I64u"
+#else
+#define PRIu64 "llu"
+#endif
+#endif
+
+#define WIDTH 640
+#define HEIGHT 480
+#define BPP 4
+#define DEPTH 32
+
+//MUST BE A POWER OF 2!
+#define EVENT_BUF_SIZE 256
+
+
+#define VERBOSE SDL_FALSE
+
+SDL_Event events[EVENT_BUF_SIZE];
+int eventWrite;
+
+int colors[7] = {0xFF,0xFF00,0xFF0000,0xFFFF00,0x00FFFF,0xFF00FF,0xFFFFFF};
+
+typedef struct {
+  float x,y;
+} Point;
+
+typedef struct {
+  float ang,r;
+  Point p;
+} Knob;
+
+Knob knob;
+
+void handler (int sig)
+{
+  printf ("\exiting...(%d)\n", sig);
+  exit (0);
+}
+
+void perror_exit (char *error)
+{
+  perror (error);
+  handler (9);
+}
+
+void setpix(SDL_Surface *screen, int x, int y, unsigned int col)
+{
+  Uint32 *pixmem32;
+  Uint32 colour;
+  
+  if((unsigned)x > screen->w) return;
+  if((unsigned)y > screen->h) return;
+
+  pixmem32 = (Uint32*) screen->pixels  + y*screen->pitch/BPP + x;
+  
+  Uint8 r,g,b;
+  float a;
+  
+  memcpy(&colour,pixmem32,screen->format->BytesPerPixel);
+
+  SDL_GetRGB(colour,screen->format,&r,&g,&b);
+  //r = 0;g = 0; b = 0;
+  a = (col>>24)&0xFF;
+  if(a == 0) a = 0xFF; //Hack, to make things easier.
+  a /= 0xFF;
+  r = r*(1-a) + ((col>>16)&0xFF)*(a);
+  g = g*(1-a) + ((col>> 8)&0xFF)*(a);
+  b = b*(1-a) + ((col>> 0)&0xFF)*(a);
+  colour = SDL_MapRGB( screen->format,r, g, b);
+  
+
+  *pixmem32 = colour;
+}
+
+void drawLine(SDL_Surface *screen,int x0,int y0,int x1,int y1,unsigned int col) {
+  float t;
+  for(t=0;t<1;t+=1.f/SDL_max(abs(x0-x1),abs(y0-y1)))
+    setpix(screen,x1+t*(x0-x1),y1+t*(y0-y1),col);
+}
+
+void drawCircle(SDL_Surface* screen,int x,int y,int r,unsigned int c)
+{
+  int tx,ty;
+  float xr;
+  for(ty = -abs(r);ty <= abs(r);ty++) {
+    xr = sqrt(r*r - ty*ty);
+    if(r > 0) { //r > 0 ==> filled circle
+      for(tx=-xr+.5;tx<=xr-.5;tx++) {
+	setpix(screen,x+tx,y+ty,c);
+      }
+    }
+    else {
+      setpix(screen,x-xr+.5,y+ty,c);
+      setpix(screen,x+xr-.5,y+ty,c);
+    }
+  }
+}
+
+void drawKnob(SDL_Surface* screen,Knob k) {
+  drawCircle(screen,k.p.x*screen->w,k.p.y*screen->h,k.r*screen->w,0xFFFFFF);  
+  drawCircle(screen,(k.p.x+k.r/2*cos(k.ang))*screen->w,
+  	            (k.p.y+k.r/2*sin(k.ang))*screen->h,k.r/4*screen->w,0);
+}
+
+void DrawScreen(SDL_Surface* screen)
+{
+  int x, y;
+  if(SDL_MUSTLOCK(screen))
+    {                                              
+      if(SDL_LockSurface(screen) < 0) return;
+    }
+  for(y = 0;y < screen->h;y++)
+    for(x = 0;x < screen->w;x++)
+	setpix(screen,x,y,((x%255)<<16) + ((y%255)<<8) + (x+y)%255);
+
+  int i;
+  //draw Touch History
+  for(i = SDL_max(0,eventWrite - EVENT_BUF_SIZE);i < eventWrite;i++) {
+    SDL_Event event = events[i&(EVENT_BUF_SIZE-1)];
+    int age = eventWrite - i - 1;
+    if(event.type == SDL_FINGERMOTION || 
+       event.type == SDL_FINGERDOWN ||
+       event.type == SDL_FINGERUP) {
+      SDL_Touch* inTouch = SDL_GetTouch(event.tfinger.touchId);
+      if(inTouch == NULL) continue;
+
+      float x = ((float)event.tfinger.x)/inTouch->xres;
+      float y = ((float)event.tfinger.y)/inTouch->yres;      
+      
+      //draw the touch:      
+      unsigned int c = colors[event.tfinger.touchId%7]; 
+      unsigned int col = 
+	((unsigned int)(c*(.1+.85))) |
+	((unsigned int)((0xFF*(1-((float)age)/EVENT_BUF_SIZE))) & 0xFF)<<24;
+
+      if(event.type == SDL_FINGERMOTION)
+	drawCircle(screen,x*screen->w,y*screen->h,5,col);
+      else if(event.type == SDL_FINGERDOWN)
+	drawCircle(screen,x*screen->w,y*screen->h,-10,col);     
+    }
+  }
+  
+  if(knob.p.x > 0)
+    drawKnob(screen,knob);
+  
+  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;
+
+  //gesture variables
+  knob.r = .1;
+  knob.ang = 0;
+
+  
+  SDL_bool quitting = SDL_FALSE;
+  SDL_RWops *src;
+
+  if (SDL_Init(SDL_INIT_VIDEO) < 0 ) return 1;
+  
+  if (!(screen = initScreen(WIDTH,HEIGHT)))
+    {
+      SDL_Quit();
+      return 1;
+    }
+
+  while(!quitting) {
+    while(SDL_PollEvent(&event)) 
+      {
+	//Record _all_ events
+	events[eventWrite & (EVENT_BUF_SIZE-1)] = event;
+	eventWrite++;
+	
+	switch (event.type) 
+	  {
+	  case SDL_QUIT:
+	    quitting = SDL_TRUE;
+	    break;
+	  case SDL_KEYDOWN:
+	    switch (event.key.keysym.sym)
+	      {
+	      case SDLK_SPACE:
+		SDL_RecordGesture(-1);
+		break;
+	      case SDLK_s:
+		src = SDL_RWFromFile("gestureSave","w");
+		printf("Wrote %i templates\n",SDL_SaveAllDollarTemplates(src));
+		SDL_RWclose(src);
+		break;
+	      case SDLK_l:
+		src = SDL_RWFromFile("gestureSave","r");
+		printf("Loaded: %i\n",SDL_LoadDollarTemplates(-1,src));
+		SDL_RWclose(src);
+		break;
+	      case SDLK_ESCAPE:
+		quitting = SDL_TRUE;
+		break;
+	    }
+	    break;
+	  case SDL_VIDEORESIZE:
+	    if (!(screen = initScreen(event.resize.w,
+				      event.resize.h)))
+	      {
+		SDL_Quit();
+		return 1;
+	      }
+	    break;
+	  case SDL_FINGERMOTION:    
+	    ;
+#if VERBOSE
+	    printf("Finger: %i,x: %i, y: %i\n",event.tfinger.fingerId,
+	    	   event.tfinger.x,event.tfinger.y);
+#endif
+	    SDL_Touch* inTouch = SDL_GetTouch(event.tfinger.touchId);
+	    SDL_Finger* inFinger = SDL_GetFinger(inTouch,event.tfinger.fingerId);
+	    break;	    
+	  case SDL_FINGERDOWN:
+#if VERBOSE
+	    printf("Finger: %"PRIs64" down - x: %i, y: %i\n",
+		   event.tfinger.fingerId,event.tfinger.x,event.tfinger.y);
+#endif
+	    break;
+	  case SDL_FINGERUP:
+#if VERBOSE
+	    printf("Finger: %"PRIs64" up - x: %i, y: %i\n",
+	    	   event.tfinger.fingerId,event.tfinger.x,event.tfinger.y);
+#endif
+	    break;
+	  case SDL_MULTIGESTURE:
+#if VERBOSE	    
+	    printf("Multi Gesture: x = %f, y = %f, dAng = %f, dR = %f\n",
+		   event.mgesture.x,
+		   event.mgesture.y,
+		   event.mgesture.dTheta,
+		   event.mgesture.dDist);
+	    printf("MG: numDownTouch = %i\n",event.mgesture.numFingers);
+#endif
+	    knob.p.x = event.mgesture.x;
+	    knob.p.y = event.mgesture.y;
+	    knob.ang += event.mgesture.dTheta;
+	    knob.r += event.mgesture.dDist;
+	    break;
+	  case SDL_DOLLARGESTURE:
+	    printf("Gesture %"PRIs64" performed, error: %f\n",
+		   event.dgesture.gestureId,
+		   event.dgesture.error);
+	    break;
+	  case SDL_DOLLARRECORD:
+	    printf("Recorded gesture: %"PRIs64"\n",event.dgesture.gestureId);
+	    break;
+	  }
+      }
+    DrawScreen(screen);
+  }  
+  SDL_Quit();  
+  return 0;
+}
+