| | |
| | | /* |
| | | Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org> |
| | | Copyright (C) 1997-2020 Sam Lantinga <slouken@libsdl.org> |
| | | |
| | | This software is provided 'as-is', without any express or implied |
| | | warranty. In no event will the authors be held liable for any damages |
| | |
| | | including commercial applications, and to alter it and redistribute it |
| | | freely. |
| | | */ |
| | | |
| | | /* Usage: |
| | | * Spacebar to begin recording a gesture on all touches. |
| | | * s to save all touches into "./gestureSave" |
| | |
| | | #include <emscripten/emscripten.h> |
| | | #endif |
| | | |
| | | #include "SDL_test.h" |
| | | #include "SDL_test_common.h" |
| | | |
| | | #define WIDTH 640 |
| | | #define HEIGHT 480 |
| | | #define BPP 4 |
| | |
| | | /* MUST BE A POWER OF 2! */ |
| | | #define EVENT_BUF_SIZE 256 |
| | | |
| | | |
| | | #define VERBOSE 0 |
| | | |
| | | static SDLTest_CommonState *state; |
| | | static SDL_Event events[EVENT_BUF_SIZE]; |
| | | static int eventWrite; |
| | | |
| | | |
| | | static int colors[7] = {0xFF,0xFF00,0xFF0000,0xFFFF00,0x00FFFF,0xFF00FF,0xFFFFFF}; |
| | | static int quitting = 0; |
| | | |
| | | SDL_Surface *screen; |
| | | SDL_Window *window; |
| | | SDL_bool quitting = SDL_FALSE; |
| | | |
| | | typedef struct { |
| | | float x,y; |
| | | typedef struct |
| | | { |
| | | float x, y; |
| | | } Point; |
| | | |
| | | typedef struct { |
| | | float ang,r; |
| | | Point p; |
| | | typedef struct |
| | | { |
| | | float ang, r; |
| | | Point p; |
| | | } Knob; |
| | | |
| | | static Knob knob; |
| | | static Knob knob = { 0.0f, 0.1f, { 0.0f, 0.0f } }; |
| | | |
| | | void setpix(SDL_Surface *screen, float _x, float _y, unsigned int col) |
| | | |
| | | static 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; |
| | | Uint32 *pixmem32; |
| | | Uint32 colour; |
| | | Uint8 r, g, b; |
| | | const int x = (int)_x; |
| | | const 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)SDL_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); |
| | | } |
| | | if ( (x < 0) || (x >= screen->w) || (y < 0) || (y >= screen->h) ) { |
| | | return; |
| | | } |
| | | else { |
| | | setpix(screen,x-xr+.5f,y+ty,c); |
| | | setpix(screen,x+xr-.5f,y+ty,c); |
| | | |
| | | 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 = (a == 0.0f) ? 1 : (a / 255.0f); |
| | | 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 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*SDL_cosf(k.ang))*screen->w, |
| | | (k.p.y+k.r/2*SDL_sinf(k.ang))*screen->h,k.r/4*screen->w,0); |
| | | } |
| | | |
| | | void DrawScreen(SDL_Surface* screen, SDL_Window* window) |
| | | static void |
| | | drawLine(SDL_Surface *screen, float x0, float y0, float x1, float y1, unsigned int col) |
| | | { |
| | | int i; |
| | | #if 1 |
| | | SDL_FillRect(screen, NULL, 0); |
| | | #else |
| | | int x, y; |
| | | 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); |
| | | #endif |
| | | |
| | | /* draw Touch History */ |
| | | for(i = eventWrite; i < eventWrite+EVENT_BUF_SIZE; ++i) { |
| | | const SDL_Event *event = &events[i&(EVENT_BUF_SIZE-1)]; |
| | | float age = (float)(i - eventWrite) / EVENT_BUF_SIZE; |
| | | float x, y; |
| | | unsigned int c, col; |
| | | |
| | | if(event->type == SDL_FINGERMOTION || |
| | | event->type == SDL_FINGERDOWN || |
| | | event->type == SDL_FINGERUP) { |
| | | x = event->tfinger.x; |
| | | y = event->tfinger.y; |
| | | |
| | | /* draw the touch: */ |
| | | c = colors[event->tfinger.fingerId%7]; |
| | | col = ((unsigned int)(c*(.1+.85))) | (unsigned int)(0xFF*age)<<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); |
| | | float t; |
| | | for (t = 0; t < 1; t += (float) (1.0f / SDL_max(SDL_fabs(x0 - x1), SDL_fabs(y0 - y1)))) { |
| | | setpix(screen, x1 + t * (x0 - x1), y1 + t * (y0 - y1), col); |
| | | } |
| | | } |
| | | |
| | | if(knob.p.x > 0) |
| | | drawKnob(screen,knob); |
| | | |
| | | SDL_UpdateWindowSurface(window); |
| | | } |
| | | |
| | | /* Returns a new SDL_Window if window is NULL or window if not. */ |
| | | SDL_Window* initWindow(SDL_Window *window, int width,int height) |
| | | static void |
| | | drawCircle(SDL_Surface *screen, float x, float y, float r, unsigned int c) |
| | | { |
| | | if (!window) { |
| | | window = SDL_CreateWindow("Gesture Test", |
| | | SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED, |
| | | width, height, SDL_WINDOW_RESIZABLE); |
| | | } |
| | | return window; |
| | | float tx,ty, xr; |
| | | for (ty = (float) -SDL_fabs(r); ty <= (float) SDL_fabs((int) r); ty++) { |
| | | xr = (float) SDL_sqrt(r * r - ty * ty); |
| | | if (r > 0) { /* r > 0 ==> filled circle */ |
| | | for(tx = -xr + 0.5f; tx <= xr - 0.5f; tx++) { |
| | | setpix(screen, x + tx, y + ty, c); |
| | | } |
| | | } else { |
| | | setpix(screen, x - xr + 0.5f, y + ty, c); |
| | | setpix(screen, x + xr - 0.5f, y + ty, c); |
| | | } |
| | | } |
| | | } |
| | | |
| | | void loop() |
| | | static void |
| | | drawKnob(SDL_Surface *screen, const 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 * SDL_cosf(k->ang)) * screen->w, |
| | | (k->p.y + k->r / 2 * SDL_sinf(k->ang)) * screen->h, k->r / 4 * screen->w, 0); |
| | | } |
| | | |
| | | static void |
| | | DrawScreen(SDL_Window *window) |
| | | { |
| | | SDL_Surface *screen = SDL_GetWindowSurface(window); |
| | | int i; |
| | | |
| | | if (!screen) { |
| | | return; |
| | | } |
| | | |
| | | SDL_FillRect(screen, NULL, SDL_MapRGB(screen->format, 75, 75, 75)); |
| | | |
| | | /* draw Touch History */ |
| | | for (i = eventWrite; i < eventWrite + EVENT_BUF_SIZE; ++i) { |
| | | const SDL_Event *event = &events[i & (EVENT_BUF_SIZE - 1)]; |
| | | const float age = (float)(i - eventWrite) / EVENT_BUF_SIZE; |
| | | float x, y; |
| | | unsigned int c, col; |
| | | |
| | | if ( (event->type == SDL_FINGERMOTION) || |
| | | (event->type == SDL_FINGERDOWN) || |
| | | (event->type == SDL_FINGERUP) ) { |
| | | x = event->tfinger.x; |
| | | y = event->tfinger.y; |
| | | |
| | | /* draw the touch: */ |
| | | c = colors[event->tfinger.fingerId % 7]; |
| | | col = ((unsigned int) (c * (0.1f + 0.85f))) | (unsigned int) (0xFF * age) << 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); |
| | | } |
| | | |
| | | SDL_UpdateWindowSurface(window); |
| | | } |
| | | |
| | | static void |
| | | loop(void) |
| | | { |
| | | SDL_Event event; |
| | | SDL_RWops *stream; |
| | | int i; |
| | | |
| | | while(SDL_PollEvent(&event)) |
| | | { |
| | | /* Record _all_ events */ |
| | | events[eventWrite & (EVENT_BUF_SIZE-1)] = event; |
| | | eventWrite++; |
| | | while (SDL_PollEvent(&event)) { |
| | | SDLTest_CommonEvent(state, &event, &quitting); |
| | | |
| | | switch (event.type) |
| | | { |
| | | case SDL_QUIT: |
| | | quitting = SDL_TRUE; |
| | | break; |
| | | case SDL_KEYDOWN: |
| | | switch (event.key.keysym.sym) |
| | | { |
| | | case SDLK_i: |
| | | { |
| | | int i; |
| | | for (i = 0; i < SDL_GetNumTouchDevices(); ++i) { |
| | | SDL_TouchID id = SDL_GetTouchDevice(i); |
| | | SDL_Log("Fingers Down on device %"SDL_PRIs64": %d", id, SDL_GetNumTouchFingers(id)); |
| | | } |
| | | break; |
| | | } |
| | | case SDLK_SPACE: |
| | | SDL_RecordGesture(-1); |
| | | break; |
| | | case SDLK_s: |
| | | stream = SDL_RWFromFile("gestureSave", "w"); |
| | | SDL_Log("Wrote %i templates", SDL_SaveAllDollarTemplates(stream)); |
| | | SDL_RWclose(stream); |
| | | break; |
| | | case SDLK_l: |
| | | stream = SDL_RWFromFile("gestureSave", "r"); |
| | | SDL_Log("Loaded: %i", SDL_LoadDollarTemplates(-1, stream)); |
| | | SDL_RWclose(stream); |
| | | break; |
| | | case SDLK_ESCAPE: |
| | | quitting = SDL_TRUE; |
| | | break; |
| | | /* Record _all_ events */ |
| | | events[eventWrite & (EVENT_BUF_SIZE-1)] = event; |
| | | eventWrite++; |
| | | |
| | | switch (event.type) { |
| | | case SDL_KEYDOWN: |
| | | switch (event.key.keysym.sym) { |
| | | case SDLK_i: { |
| | | for (i = 0; i < SDL_GetNumTouchDevices(); ++i) { |
| | | const SDL_TouchID id = SDL_GetTouchDevice(i); |
| | | SDL_Log("Fingers Down on device %"SDL_PRIs64": %d", id, SDL_GetNumTouchFingers(id)); |
| | | } |
| | | break; |
| | | } |
| | | |
| | | case SDLK_SPACE: |
| | | SDL_RecordGesture(-1); |
| | | break; |
| | | |
| | | case SDLK_s: |
| | | stream = SDL_RWFromFile("gestureSave", "w"); |
| | | SDL_Log("Wrote %i templates", SDL_SaveAllDollarTemplates(stream)); |
| | | SDL_RWclose(stream); |
| | | break; |
| | | |
| | | case SDLK_l: |
| | | stream = SDL_RWFromFile("gestureSave", "r"); |
| | | SDL_Log("Loaded: %i", SDL_LoadDollarTemplates(-1, stream)); |
| | | SDL_RWclose(stream); |
| | | break; |
| | | } |
| | | break; |
| | | |
| | | #if VERBOSE |
| | | case SDL_FINGERMOTION: |
| | | SDL_Log("Finger: %"SDL_PRIs64",x: %f, y: %f",event.tfinger.fingerId, |
| | | event.tfinger.x,event.tfinger.y); |
| | | break; |
| | | |
| | | case SDL_FINGERDOWN: |
| | | SDL_Log("Finger: %"SDL_PRIs64" down - x: %f, y: %f", |
| | | event.tfinger.fingerId,event.tfinger.x,event.tfinger.y); |
| | | break; |
| | | |
| | | case SDL_FINGERUP: |
| | | SDL_Log("Finger: %"SDL_PRIs64" up - x: %f, y: %f", |
| | | event.tfinger.fingerId,event.tfinger.x,event.tfinger.y); |
| | | break; |
| | | #endif |
| | | |
| | | case SDL_MULTIGESTURE: |
| | | #if VERBOSE |
| | | SDL_Log("Multi Gesture: x = %f, y = %f, dAng = %f, dR = %f", |
| | | event.mgesture.x, event.mgesture.y, |
| | | event.mgesture.dTheta, event.mgesture.dDist); |
| | | SDL_Log("MG: numDownTouch = %i",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: |
| | | SDL_Log("Gesture %"SDL_PRIs64" performed, error: %f", |
| | | event.dgesture.gestureId, event.dgesture.error); |
| | | break; |
| | | |
| | | case SDL_DOLLARRECORD: |
| | | SDL_Log("Recorded gesture: %"SDL_PRIs64"",event.dgesture.gestureId); |
| | | break; |
| | | } |
| | | break; |
| | | case SDL_WINDOWEVENT: |
| | | if (event.window.event == SDL_WINDOWEVENT_RESIZED) { |
| | | if (!(window = initWindow(window, event.window.data1, event.window.data2)) || |
| | | !(screen = SDL_GetWindowSurface(window))) |
| | | { |
| | | SDL_Quit(); |
| | | exit(1); |
| | | } |
| | | } |
| | | break; |
| | | case SDL_FINGERMOTION: |
| | | #if VERBOSE |
| | | SDL_Log("Finger: %"SDL_PRIs64",x: %f, y: %f",event.tfinger.fingerId, |
| | | event.tfinger.x,event.tfinger.y); |
| | | #endif |
| | | break; |
| | | case SDL_FINGERDOWN: |
| | | #if VERBOSE |
| | | SDL_Log("Finger: %"SDL_PRIs64" down - x: %f, y: %f", |
| | | event.tfinger.fingerId,event.tfinger.x,event.tfinger.y); |
| | | #endif |
| | | break; |
| | | case SDL_FINGERUP: |
| | | #if VERBOSE |
| | | SDL_Log("Finger: %"SDL_PRIs64" up - x: %f, y: %f", |
| | | event.tfinger.fingerId,event.tfinger.x,event.tfinger.y); |
| | | #endif |
| | | break; |
| | | case SDL_MULTIGESTURE: |
| | | #if VERBOSE |
| | | SDL_Log("Multi Gesture: x = %f, y = %f, dAng = %f, dR = %f", |
| | | event.mgesture.x, |
| | | event.mgesture.y, |
| | | event.mgesture.dTheta, |
| | | event.mgesture.dDist); |
| | | SDL_Log("MG: numDownTouch = %i",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: |
| | | SDL_Log("Gesture %"SDL_PRIs64" performed, error: %f", |
| | | event.dgesture.gestureId, |
| | | event.dgesture.error); |
| | | break; |
| | | case SDL_DOLLARRECORD: |
| | | SDL_Log("Recorded gesture: %"SDL_PRIs64"",event.dgesture.gestureId); |
| | | break; |
| | | } |
| | | } |
| | | DrawScreen(screen, window); |
| | | |
| | | for (i = 0; i < state->num_windows; ++i) { |
| | | if (state->windows[i]) { |
| | | DrawScreen(state->windows[i]); |
| | | } |
| | | } |
| | | |
| | | #ifdef __EMSCRIPTEN__ |
| | | if (quitting) { |
| | |
| | | |
| | | int main(int argc, char* argv[]) |
| | | { |
| | | window = NULL; |
| | | screen = NULL; |
| | | quitting = SDL_FALSE; |
| | | state = SDLTest_CommonCreateState(argv, SDL_INIT_VIDEO); |
| | | if (!state) { |
| | | return 1; |
| | | } |
| | | |
| | | /* Enable standard application logging */ |
| | | SDL_LogSetPriority(SDL_LOG_CATEGORY_APPLICATION, SDL_LOG_PRIORITY_INFO); |
| | | state->window_title = "Gesture Test"; |
| | | state->window_w = WIDTH; |
| | | state->window_h = HEIGHT; |
| | | state->skip_renderer = SDL_TRUE; |
| | | |
| | | /* gesture variables */ |
| | | knob.r = .1f; |
| | | knob.ang = 0; |
| | | |
| | | if (SDL_Init(SDL_INIT_VIDEO) < 0 ) return 1; |
| | | |
| | | if (!(window = initWindow(window, WIDTH, HEIGHT)) || |
| | | !(screen = SDL_GetWindowSurface(window))) |
| | | { |
| | | SDL_Quit(); |
| | | return 1; |
| | | } |
| | | if (!SDLTest_CommonDefaultArgs(state, argc, argv) || !SDLTest_CommonInit(state)) { |
| | | SDLTest_CommonQuit(state); |
| | | return 1; |
| | | } |
| | | |
| | | #ifdef __EMSCRIPTEN__ |
| | | emscripten_set_main_loop(loop, 0, 1); |
| | | #else |
| | | while(!quitting) { |
| | | while (!quitting) { |
| | | loop(); |
| | | } |
| | | #endif |
| | | |
| | | SDL_Quit(); |
| | | return 0; |
| | | SDLTest_CommonQuit(state); |
| | | return 0; |
| | | } |
| | | |