BangleApps/apps/geissclk/clock.js

var W = 79, H = 64;
/*var compiled = E.compiledC(`
// void transl(int, int, int )
int transl(unsigned char *map, unsigned char *imgfrom, unsigned char *imgto) {
  int n = 0;
  const int W = 79;
  const int H = 64;
  for (int y=0;y<H;y++)
    for (int x=0;x<W;x++) {
      int d = map[n];
      int nx = (x<<3) + ((d   )&0x0F) - 8;
      int ny = (y<<3) + ((d>>4)&0x0F) - 8;
      int ax = nx&7;
      int ay = ny&7;
      int a = (nx>>3) + ((ny>>3)*W);
      int c = 0;
      if (a>=0 && a<(W*H-(W+1))) {
        c = imgfrom[a]*(8-ax)*(8-ay) +
                imgfrom[a+1]*(ax)*(8-ay) +
                imgfrom[a+W]*(8-ax)*(ay) +
                imgfrom[a+W+1]*(ax)*(ay);
        c = (c>>6) - 4;
        if (c<0) c=0;
      }
      imgto[n] = c;
      n++;
    }
}
`);*/
var compiled = (function(){
  var bin=atob("Len3TwAnT/BPCPsAAJMI+wfzAOsDCdMYAZMAJhn4BkAAnQTwDwMD68YDBesUFAg7CDzdEE/q5AoI+wpaQfJvNapFItgB6woOA/AHAxH4CsCe+AGww/EIBQX7DPwD+wvMnvhPsATwBwQF+wv1ZUPE8QgKCvsMXJ74UFBrQwT7A8SkEQQ8JOrkdADgACQBm5xVATZPLsLRATdAL7bRA7C96PCPAAA=");
  return {
    transl:E.nativeCall(1, "void(int, int, int )", bin),
  };
})();

//require("Font5x9Numeric7Seg").add(Graphics);
Graphics.prototype.setFont5x9Numeric7Seg = function() {
   this.setFontCustom(atob("AAAAAAAAAAIAAAQCAQAAAd0BgMBdwAAAAAAAdwAB0RiMRcAAAERiMRdwAcAQCAQdwAcERiMRBwAd0RiMRBwAAEAgEAdwAd0RiMRdwAcERiMRdwAFAAd0QiEQdwAdwRCIRBwAd0BgMBAAABwRCIRdwAd0RiMRAAAd0QiEQAAAAAAAAAA="), 32, atob("BgAAAAAAAAAAAAAAAAYCAAYGBgYGBgYGBgYCAAAAAAAABgYGBgYG"), 9);
  }

// Allocate the data
var dataa = new Uint8Array(W*H);
var datab = new Uint8Array(W*H);
var map = new Uint8Array(W*H);
var pal = new Uint16Array(256);
var PALETTES = 3;
var MAPS = 6;

// If we're missing any maps, compute them!
(function() {
  var files = require("Storage").list(/^geissclk/);
  var allOk = true;
  for (var n=0;n<PALETTES;n++)
    if (!files.includes("geissclk."+n+".pal"))
      allOk = false;
  for (var n=0;n<MAPS;n++)
    if (!files.includes("geissclk."+n+".map"))
      allOk = false;
  if (!allOk)
    eval(require("Storage").read("geissclk.precompute.js"));
})();

function randomPalette() {
  var n = (0|Math.random()*200000) % PALETTES;
  var p = new Uint8Array(pal.buffer);
  p.set(require("Storage").readArrayBuffer("geissclk."+n+".pal"));
}

function randomMap() {
  var n = (0|Math.random()*200000) % MAPS;
  map.set(require("Storage").readArrayBuffer("geissclk."+n+".map"));
}


randomPalette();
randomMap();

// Get the address
var addra = E.getAddressOf(dataa,true);
if (!addra) throw new Error("Not a Flat String");
var addrb = E.getAddressOf(datab,true);
if (!addrb) throw new Error("Not a Flat String");
var addrmap = E.getAddressOf(map,true);
if (!addrmap) throw new Error("Not a Flat String");
var gfx = Graphics.createArrayBuffer(W,H,8);
gfx.buffer = dataa.buffer;

var im = {
  width:W, height:H, bpp:8,
  palette: pal,
  buffer : dataa.buffer
};
var lastSeconds = -1;

function iterate() { "ram"
  var d = new Date();
  var time = require("locale").time(d,1);
  var seconds = d.getSeconds().toString().padStart(2,0);
  t = addra; addra = addrb; addrb = t;
  t = dataa; dataa = datab; datab = t;
  if (seconds!=lastSeconds) {
    lastSeconds = seconds;
    im.buffer = datab.buffer;
    gfx.buffer = datab.buffer;
  } else {
    im.buffer = dataa.buffer;
    gfx.buffer = dataa.buffer;
  }
  var x,y,n,t = getTime()/10;
  var amt = 100*Bangle.getAccel().diff;
  for (var i=0;i<amt;i++) {
    //x = Math.round((W/2) + 20*Math.sin(t));
    //y = Math.round((H/2) + 20*Math.cos(t));
    //t += 0.628;
    x = 1+(Math.random()*(W-2))|0;
    y = 1+(Math.random()*(H-2))|0;
    dataa[x + y*W] = 240;
  }
  compiled.transl(addrmap, addra, addrb);


  x = 8;
  gfx.setFont("5x9Numeric7Seg",2);
  gfx.drawString(time, x, 20);
  gfx.setFont("5x9Numeric7Seg");
  gfx.drawString(seconds, x+55, 30);
  // firmwares pre-2v09 wouldn't accelerate a 3x blit if it went right to the RHS - hence we're 79px not 80
  g.drawImage(im,1,24,{scale:3});
}


Bangle.on('lcdPower',function(on) {
  if (animInterval) {
    clearInterval(animInterval);
    animInterval = undefined;
  }
  if (on) {
    randomMap();
    randomPalette();
    iterate();
    animInterval = setInterval(iterate, 50);
  }
});
g.clear();
Bangle.loadWidgets();
Bangle.drawWidgets();
iterate();
animInterval = setInterval(iterate, 50);

// Show launcher when button pressed
Bangle.setUI("clock");