75 lines
2.8 KiB
C++
75 lines
2.8 KiB
C++
#include <android/log.h>
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#include "SDL.h"
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int main(int argc, char* argv[])
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{
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SDL_Init(SDL_INIT_VIDEO | SDL_INIT_AUDIO | SDL_INIT_JOYSTICK);
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SDL_Surface * screen = SDL_SetVideoMode(640, 480, 16, 0);
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enum { MAX_POINTERS = 16 };
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// some random colors
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int colors[MAX_POINTERS] = { 0xaaaaaa, 0xffffff, 0x888888, 0xcccccc, 0x666666, 0x999999, 0xdddddd, 0xeeeeee, 0xaaaaaa, 0xffffff, 0x888888, 0xcccccc, 0x666666, 0x999999, 0xdddddd, 0xeeeeee };
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struct TouchPointer_t { int x; int y; int pressure; int pressed; } touchPointers[MAX_POINTERS];
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int accel[3]; // Only first 2 coords are used
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int i;
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memset(touchPointers, 0, sizeof(touchPointers));
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memset(accel, 0, sizeof(accel));
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SDL_Joystick * joystick = SDL_JoystickOpen(i);
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while(1)
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{
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SDL_Event evt;
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while( SDL_PollEvent(&evt) )
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{
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if( evt.type == SDL_JOYAXISMOTION )
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{
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if(evt.jaxis.axis < 3)
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accel[evt.jaxis.axis] = evt.jaxis.value; // Those events are spammy, don't log them
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else
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{
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__android_log_print(ANDROID_LOG_INFO, "Multitouch", "SDL_JOYAXISMOTION %d value %06d", (int)evt.jaxis.axis, (int)evt.jaxis.value );
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touchPointers[evt.jaxis.axis-3].pressure = evt.jaxis.value;
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}
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}
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if( evt.type == SDL_JOYBUTTONDOWN || evt.type == SDL_JOYBUTTONUP )
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{
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__android_log_print(ANDROID_LOG_INFO, "Multitouch", "SDL_JOYBUTTON %d value %d", (int)evt.jbutton.button, (int)evt.jbutton.state );
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touchPointers[evt.jbutton.button].pressed = (evt.jbutton.state == SDL_PRESSED);
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}
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if( evt.type == SDL_JOYBALLMOTION )
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{
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__android_log_print(ANDROID_LOG_INFO, "Multitouch", "SDL_JOYBALLMOTION %d %06d:%06d", (int)evt.jball.ball, (int)evt.jball.xrel, (int)evt.jball.yrel );
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touchPointers[evt.jball.ball].x = evt.jball.xrel;
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touchPointers[evt.jball.ball].y = evt.jball.yrel;
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}
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if(evt.type == SDL_KEYDOWN && evt.key.keysym.sym == SDLK_ESCAPE)
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return 0;
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}
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SDL_FillRect(screen, 0, 0);
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SDL_Rect r;
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for(i=0; i<MAX_POINTERS; i++)
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{
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if( !touchPointers[i].pressed )
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continue;
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r.x = touchPointers[i].x;
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r.y = touchPointers[i].y;
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r.w = 50 + touchPointers[i].pressure / 5;
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r.h = 50 + touchPointers[i].pressure / 5;
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r.x -= r.w/2;
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r.y -= r.h/2;
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SDL_FillRect(screen, &r, colors[i]);
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}
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r.x = 320 + accel[0] / 100;
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r.y = 240 + accel[1] / 100;
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r.w = 10;
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r.h = 10;
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r.x -= r.w/2;
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r.y -= r.h/2;
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SDL_FillRect(screen, &r, 0xffffff);
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SDL_Flip(screen);
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}
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return 0;
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}
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