Mercurial > sdl-ios-xcode
view test/testgesture.c @ 5089:b4b0e9f1669c
Fixed bug #1103
The SDL_blendmode.h and SDL_scalemode.h headers needed to be added to the Public Headers and all the public headers need to have the "Public" role set.
author | Sam Lantinga <slouken@libsdl.org> |
---|---|
date | Mon, 24 Jan 2011 16:10:13 -0800 |
parents | c2539ff054c8 |
children |
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/* 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, float _x, float _y, unsigned int col) { Uint32 *pixmem32; Uint32 colour; Uint8 r,g,b; int x = (int)_x; int y = (int)_y; float a; if(x < 0 || x > screen->w) return; if(y < 0 || y > screen->h) return; pixmem32 = (Uint32*) screen->pixels + y*screen->pitch/BPP + x; SDL_memcpy(&colour,pixmem32,screen->format->BytesPerPixel); SDL_GetRGB(colour,screen->format,&r,&g,&b); //r = 0;g = 0; b = 0; a = (float)((col>>24)&0xFF); if(a == 0) a = 0xFF; //Hack, to make things easier. a /= 0xFF; r = (Uint8)(r*(1-a) + ((col>>16)&0xFF)*(a)); g = (Uint8)(g*(1-a) + ((col>> 8)&0xFF)*(a)); b = (Uint8)(b*(1-a) + ((col>> 0)&0xFF)*(a)); colour = SDL_MapRGB( screen->format,r, g, b); *pixmem32 = colour; } void drawLine(SDL_Surface *screen,float x0,float y0,float x1,float y1,unsigned int col) { float t; for(t=0;t<1;t+=(float)(1.f/SDL_max(SDL_fabs(x0-x1),SDL_fabs(y0-y1)))) setpix(screen,x1+t*(x0-x1),y1+t*(y0-y1),col); } void drawCircle(SDL_Surface* screen,float x,float y,float r,unsigned int c) { float tx,ty; float xr; for(ty = (float)-SDL_fabs(r);ty <= (float)SDL_fabs((int)r);ty++) { xr = (float)sqrt(r*r - ty*ty); if(r > 0) { //r > 0 ==> filled circle for(tx=-xr+.5f;tx<=xr-.5;tx++) { setpix(screen,x+tx,y+ty,c); } } else { setpix(screen,x-xr+.5f,y+ty,c); setpix(screen,x+xr-.5f,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*cosf(k.ang))*screen->w, (k.p.y+k.r/2*sinf(k.ang))*screen->h,k.r/4*screen->w,0); } void DrawScreen(SDL_Surface* screen) { int x, y, i; 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,(float)x,(float)y,((x%255)<<16) + ((y%255)<<8) + (x+y)%255); //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; float x, y; unsigned int c, col; 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; x = ((float)event.tfinger.x)/inTouch->xres; y = ((float)event.tfinger.y)/inTouch->yres; //draw the touch: c = colors[event.tfinger.touchId%7]; 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; SDL_bool quitting = SDL_FALSE; SDL_RWops *src; //gesture variables knob.r = .1f; knob.ang = 0; 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; }