dribnet · April 3, 2017 22:56
diff --git a/.block b/.block
 license: mit
diff --git a/.purview_helper.js b/.purview_helper.js
 // note: this file is poorly named - it can generally be ignored.

 // helper functions below for supporting blocks/purview

 function saveBlocksImages(doZoom) {
  if(doZoom == null) {
    doZoom = false;
  }

  // generate 960x500 preview.jpg of entire canvas
  // TODO: should this be recycled?
  var offscreenCanvas = document.createElement('canvas');
  offscreenCanvas.width = 960;
  offscreenCanvas.height = 500;
  var context = offscreenCanvas.getContext('2d');
  // background is flat white
  context.fillStyle="#FFFFFF";
  context.fillRect(0, 0, 960, 500);
  context.drawImage(this.canvas, 0, 0, 960, 500);
  // save to browser
  var downloadMime = 'image/octet-stream';
  var imageData = offscreenCanvas.toDataURL('image/jpeg');
  imageData = imageData.replace('image/jpeg', downloadMime);
  p5.prototype.downloadFile(imageData, 'preview.jpg', 'jpg');

  // generate 230x120 thumbnail.png centered on mouse
  offscreenCanvas.width = 230;
  offscreenCanvas.height = 120;

  // background is flat white  
  context = offscreenCanvas.getContext('2d');
  context.fillStyle="#FFFFFF";
  context.fillRect(0, 0, 230, 120);

  if(doZoom) {
    // pixelDensity does the right thing on retina displays
    var pd = this._pixelDensity;
    var sx = pd * mouseX - pd * 230/2;
    var sy = pd * mouseY - pd * 120/2;
    var sw = pd * 230;
    var sh = pd * 120;
    // bounds checking - just displace if necessary
    if (sx < 0) {
      sx = 0;
    }
    if (sx > this.canvas.width - sw) {
      sx = this.canvas.width - sw;
    }
    if (sy < 0) {
      sy = 0;
    }
    if (sy > this.canvas.height - sh) {
      sy = this.canvas.height - sh;
    }
    // save to browser
    context.drawImage(this.canvas, sx, sy, sw, sh, 0, 0, 230, 120);
  }
  else {
    // now scaledown
    var full_width = this.canvas.width;
    var full_height = this.canvas.height;
    context.drawImage(this.canvas, 0, 0, full_width, full_height, 0, 0, 230, 120);
  }
  imageData = offscreenCanvas.toDataURL('image/png');
  imageData = imageData.replace('image/png', downloadMime);
  p5.prototype.downloadFile(imageData, 'thumbnail.png', 'png');
 }
diff --git a/README.md b/README.md
diff --git a/clock.js b/clock.js
 /*
 * us p5.js to draw a clock on a 960x500 canvas
 */ 

 // in browser, URLs can be relative or absolute
 const model = new KerasJS.Model({
  filepaths: {
    model: 'mnist_06_110_decoder.json',
    weights: 'mnist_06_decoder_weights_weights.buf',
    metadata: 'mnist_06_decoder_weights_metadata.json'
  },
  gpu: true
 })

 var concept_vecs = [
  [-0.097372,  0.598627, -0.427888, -0.388575, -0.447317,  0.543890, -0.420167, -0.526876],
  [ 0.482085, -0.421570,  0.156896,  0.101969,  0.710080, -0.315153,  0.189396, -0.628475],
  [ 0.199009,  0.302628, -0.304984,  0.743103, -0.321666, -0.196440,  0.837206, -0.164660],
  [ 0.702927,  0.061100,  0.391677,  0.078674, -0.263728,  0.399588, -0.117211,  0.555933],
  [-0.887413,  0.153023,  0.637169, -0.192469,  0.257092, -0.610011,  0.369441,  0.231632],
  [ 0.216774, -0.898855,  0.178582, -0.546435, -0.145294,  0.506996,  0.026063,  0.054160],
  [ 0.154096,  0.222272,  0.355234, -0.828151, -0.295889, -0.548858,  0.320933, -0.284068],
  [-0.004918, -0.491446,  0.105555,  0.905816, -0.065926,  0.348899, -0.759633, -0.242949],
  [-0.026785,  0.249264, -0.292006, -0.133150,  0.454588,  0.370761,  0.128081,  0.253320],
  [-0.478251,  0.057617, -0.203836, -0.186867,  0.461135,  0.025850, -0.784070, -0.052860]
 ];

 var curAnchor = [0.1, 0.1, 0.1, 0.1, 0.1, 0.1, 0.1, 0.1];
 var curDAnchor = [0.6, 0.6, 0.6, 0.6, 0.6, 0.6, 0.6, 0.6];

 var curModelImages = [null, null, null, null, null, null];
 var curConceptVecs = [null, null, null, null, null, null];
 var digitPositions = [null, null, null, null, null, null];

 var MODEL_LOADING = 0;
 var MODEL_READY = 1;
 var MODEL_LOAD_ERROR = 2;
 var MODEL_WORKING = 3;
 var modelStatus = MODEL_LOADING;

 function local_setup() {
  model.ready()
    .then(() => {
      print("Model says it is ready")
      modelStatus = MODEL_READY;
      // redraw();
    })
    .catch(err => {
      // handle error
      print("Model says LOAD_ERROR")
      modelStatus = MODEL_LOAD_ERROR;
      // redraw();
    })

  for(var i=0; i<6; i++) {
    curModelImages[i] = createImage(56, 56);
  }
  for(var i=0; i<8; i++) {
    curDAnchor[i] = random(0.01, 0.05);
  }

  var s = 24;
  var hour_pos = [80, height/2 - 2 * s];
  digitPositions[0] = [hour_pos[0] + 0.0 * 5 * s, hour_pos[1]];
  digitPositions[1] = [hour_pos[0] + 1.0 * 5 * s, hour_pos[1]];
  digitPositions[2] = [hour_pos[0] + 2.5 * 5 * s, hour_pos[1]];
  digitPositions[3] = [hour_pos[0] + 3.5 * 5 * s, hour_pos[1]];
  digitPositions[4] = [hour_pos[0] + 5.0 * 5 * s, hour_pos[1]];
  digitPositions[5] = [hour_pos[0] + 6.0 * 5 * s, hour_pos[1]];
 }

 function move_anchor() {
  for(var i=0; i<8; i++) {
    var next = curAnchor[i] + curDAnchor[i];
    if(next > 0.5) {
      curDAnchor[i] = random(-0.01, -0.03);
      next = curAnchor[i] + curDAnchor[i];
    }
    else if(next < -0.5) {
      curDAnchor[i] = random(0.01, 0.03);
      next = curAnchor[i] + curDAnchor[i];
    }
    curAnchor[i] = next;
  }
  // print(curAnchor);
 }

 function digits_from_num(num) {
  digits = []
  if (num < 10) {
    digits.push(0);
  }
  else {
    n1 = Math.floor(num / 10);
    digits.push(n1);
  }
  n2 = Math.floor(num % 10);
  digits.push(n2);
  return digits;
 }

 function interp_vec(frac, v1, v2) {
  var v = new Array(8);
  for(var i=0; i<8; i++) {
    v[i] = lerp(v1[i], v2[i], frac)
  }
  return v;
 }

 function add_vec(v1, v2) {
  var v = new Array(8);
  for(var i=0; i<8; i++) {
    v[i] = v1[i] + v2[i];
  }
  return v;  
 }

 // numbers waiting to be drawn
 var pendingOutput = [null, null, null, null, null, null];
 var digit_in_flight = false;

 function firePrediction() {
  var predict_map = [];
  for(var i=0; i<6; i++) {
    predict_map.push({ input_1: curConceptVecs[i] })
  }
  modelStatus = MODEL_WORKING;
  Promise.mapSeries(curConceptVecs, arr => model.predict({ input_1: arr }))
  .then(outputs => {
    for(var i=0; i<6; i++) {
      pendingOutput[i] = outputs[i]['convolution2d_5']
    }
    modelStatus = MODEL_READY;
  })

  // const inputData = { input_1: new Float32Array(v_sum) };
  // model.predict(inputData).then(outputData => {
  //   pendingOutput[ix] = outputData['convolution2d_5'];
  //   digit_in_flight[ix] = false;
  // });
 }

 function get_cur_concept_vec(frac, num1, num2) {
  var v1 = concept_vecs[num1];
  var v2 = concept_vecs[num2];
  var v_interp = interp_vec(frac, v1, v2);
  var v_sum = add_vec(curAnchor, v_interp);
  return new Float32Array(v_sum);
 }

 var first_time = true;

 function draw_clock(hour, minute, second, millis, alarm) {
  if(first_time) {
    local_setup();
    first_time = false;
    background(0);
  }

  move_anchor();

  // is alarm going off?
  /*
  if (alarm == 0) {
    if (second % 2 == 0) {
      background(0,0,100);      
    }
    else {
      background(100,100,0);      
    }
  }
  else {
    background(0);
  }
  */
  // background(0);
  blendMode(BLEND);
  fill(0, 0, 0, 96);
  rect(0, height/3, width, 2*height/3);
  blendMode(ADD);

  // draw what digits we have
  var one_was_pending = false;
  for(var d=0;d<6;d++) {
    if(pendingOutput[d] != null) {
      one_was_pending = true;
      var curOutput = pendingOutput[d];
      pendingOutput[d] = null;

      curModelImages[d].loadPixels();
      for (var i = 0; i < 27; i++) {
        for (var j = 0; j < 27; j++) {
          var val = (255 * curOutput[j*27 + i]);
          if(val == null || curModelImages[d] == null) {
            print("Found error at " + d + ":" + val +"," + curModelImages[d]);
          }
          else {
            // print(val);
            var c = color(val);
            curModelImages[d].set(i*2, j*2, c);
            curModelImages[d].set(i*2+1, j*2, c);
            curModelImages[d].set(i*2, j*2+1, c);
            curModelImages[d].set(i*2+1, j*2+1, c);
          }
        }
      }
      curModelImages[d].updatePixels();
    }
    if(curModelImages[d] != null) {
      image(curModelImages[d], digitPositions[d][0], digitPositions[d][1]);
    }
  }
  if(digit_in_flight && modelStatus == MODEL_READY && !one_was_pending) {
    digit_in_flight = false;
  }

  // see if we should compute a new set of digits
  if(modelStatus == MODEL_READY && digit_in_flight == false) {
    digit_in_flight = true;
    var precise_s = second + millis / 1000.0;
    print(hour, minute, precise_s);

    // HOURS
    next_hour = (hour + 1) % 24;
    digits1 = digits_from_num(hour);
    digits2 = digits_from_num(next_hour);
    if(second >= 50 && minute == 59 && 
        (hour == 9 || hour == 19 || hour == 23)) {
      // minute_fraction_tens = millis  / 1000.0;
      seconds_left = (second - 50) + millis / 1000.0;
      hour_fraction_tens = seconds_left  / 10.0;
    }
    else {
      hour_fraction_tens = 0;
    }
    curConceptVecs[0] = get_cur_concept_vec(hour_fraction_tens, digits1[0], digits2[0]);

    if(second >= 55 && minute == 59) {
      // minute_fraction_tens = millis  / 1000.0;
      seconds_left = (second - 55) + millis / 1000.0;
      hour_fraction_ones = seconds_left  / 5.0;
    }
    else {
      hour_fraction_ones = 0;
    }
    curConceptVecs[1] = get_cur_concept_vec(hour_fraction_ones, digits1[1], digits2[1]);

    // MINUTES
    next_minute = (minute + 1) % 60;
    digits1 = digits_from_num(minute);
    digits2 = digits_from_num(next_minute);
    if(second >= 58 && digits1[1] === 9) {
      // minute_fraction_tens = millis  / 1000.0;
      seconds_left = (second - 58) + millis / 1000.0;
      minute_fraction_tens = seconds_left  / 2.0;
    }
    else {
      minute_fraction_tens = 0;
    }
    curConceptVecs[2] = get_cur_concept_vec(minute_fraction_tens, digits1[0], digits2[0]);


    if(second === 59) {
      minute_fraction_ones = millis  / 1000.0;
    }
    else {
      minute_fraction_ones = 0;
    }
    curConceptVecs[3] = get_cur_concept_vec(minute_fraction_ones, digits1[1], digits2[1]);

    // SECONDS
    next_second = (second + 1) % 60;
    second_fraction = millis / 1000.0;
    digits1 = digits_from_num(second);
    digits2 = digits_from_num(next_second);


    if(digits1[1] === 9 && millis > 500) {
      second_fraction_tens = (millis - 500) / 500.0;
    }
    else {
      second_fraction_tens = 0;
    }
    // draw the 10 second position
    curConceptVecs[4] = get_cur_concept_vec(second_fraction_tens, digits1[0], digits2[0]);

    if(millis > 750) {
      second_fraction_ones = (millis-750) / 250.0;
    }
    else {
      second_fraction_ones = 0;
    }
    // draw the 1 second position
    curConceptVecs[5] = get_cur_concept_vec(second_fraction_ones, digits1[1], digits2[1]);
    firePrediction();
  }
 }
diff --git a/debug.html b/debug.html
 <head>
    <meta charset="utf-8">
    <script src="http://cdnjs.cloudflare.com/ajax/libs/p5.js/0.5.8/p5.js"></script>
    <script src="http://cdnjs.cloudflare.com/ajax/libs/p5.js/0.5.8/addons/p5.dom.js"></script>
    <script language="javascript" type="text/javascript" src=".purview_helper.js"></script>
    <script src="keras.js"></script>
    <script src="https://cdn.jsdelivr.net/bluebird/latest/bluebird.min.js"></script>
    <script language="javascript" type="text/javascript" src="debug.js"></script>
    <script language="javascript" type="text/javascript" src="clock.js"></script>
    <script language="javascript" type="text/javascript" src="sketch.js"></script>
 </head>
 <body style="background-color:white">
    <div class="outer">
        <div class="inner">
            <div id="canvasContainer"></div>
        </div>
        <div class="inner" id="controls">
            <table>
                <tr>
                    <td>debug</td>
                    <td id="checkboxDebug"></td>
                </tr>
                <tr>
                    <td>hours</td>
                    <td id="sliderHours"></td>
                    <td>minutes</td>
                    <td id="sliderMinutes"></td>
                    <td>seconds</td>
                    <td id="sliderSeconds"></td>
                    <td>millis</td>
                    <td id="sliderMillis"></td>
                </tr>
                <tr>
                    <td>alarm</td>
                    <td id="checkboxAlarm"></td>
                    <td>alarm_secs</td>
                    <td id="sliderAlarm"></td>
                </tr>
            </table>
        </div>
    </div>
 </table>
 </body>
diff --git a/debug.js b/debug.js
 var DEBUG=true;

 var debugCheckbox;
 var hourSlider;
 var minSlider;
 var secSlider;
 var millisSlider;
 var alarmSlider;

 function debug_setup() {
  debugCheckbox = createCheckbox('', false);
  debugCheckbox.parent("checkboxDebug")
  hourSlider = createSlider(0, 23, 12);
  hourSlider.parent("sliderHours")
  minSlider = createSlider(0, 59, 0);
  minSlider.parent("sliderMinutes")
  secSlider = createSlider(0, 59, 0);
  secSlider.parent("sliderSeconds")
  millisSlider = createSlider(0, 999, 0);
  millisSlider.parent("sliderMillis")
  alarmCheckbox = createCheckbox('', false);
  alarmCheckbox.parent("checkboxAlarm")
  alarmSlider = createSlider(0, 60, 0);
  alarmSlider.parent("sliderAlarm")
 }
diff --git a/index.html b/index.html
 <head>
    <meta charset="utf-8">
    <script src="http://cdnjs.cloudflare.com/ajax/libs/p5.js/0.5.8/p5.js"></script>
    <script src="http://cdnjs.cloudflare.com/ajax/libs/p5.js/0.5.8/addons/p5.dom.js"></script>
    <script language="javascript" type="text/javascript" src=".purview_helper.js"></script>
    <script src="keras.js"></script>
    <script src="https://cdn.jsdelivr.net/bluebird/latest/bluebird.min.js"></script>
    <script language="javascript" type="text/javascript" src="clock.js"></script>
    <script language="javascript" type="text/javascript" src="sketch.js"></script>
 </head>
 <body style="background-color:white">
    <div class="outer">
        <div class="inner">
            <div id="canvasContainer"></div>
        </div>
    </div>
 </table>
 </body>
diff --git a/keras.js b/keras.js
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c(t,!1);return{Tensor:f,sscal:e,sgemm:n,sdwns:r,sclmp:o,slokn:p,sgemmcalculator:h,saxpycalculator:d,sscalcalculator:v,sdwnscalculator:m,sclmpcalculator:_,slokncalculator:g}}var o=t("./globals"),i=t("./sgemmcalculator"),a=t("./saxpycalculator"),s=t("./sscalcalculator"),u=t("./sdwnscalculator"),l=t("./sclmpcalculator"),c=t("./slokncalculator"),f=t("./tensor");o.gl?e.exports=r(o.gl):e.exports=null},{"./globals":2,"./saxpycalculator":4,"./sclmpcalculator":5,"./sdwnscalculator":6,"./sgemmcalculator":7,"./slokncalculator":8,"./sscalcalculator":9,"./tensor":10}],4:[function(t,e,n){function r(t,e){this.webgl=t,this.standalone=e||!0;var n="precision highp float;\n#define GLSLIFY 1\n\nvarying vec2      outTex;\t// texture coords of row/column to calculate\nuniform sampler2D X;\t\t// texture with data from padded A\nuniform sampler2D Y;\t\t// texture with data from padded transpose of B\nuniform int       N;\nuniform float     a; \t\t// coefficient to multiplication\n\n// Render float to bytes according to IEEE 754 Floating Point\nvec4 encode_float_1540259130(float val) {\n\n\t// TODO: correctly handle denormal numbers\n\t// http://www.2ality.com/2012/04/number-encoding.html\n\tfloat a = abs(val);                           // encode absolute value + sign\n\tfloat exp = floor(log2(a));                 // number of powers of 2\n\tfloat mant = pow(2.,log2(a)-exp) * pow(2.,23.);  // multiply to fill 24 bits (implied leading 1)\n\tfloat mant1 = floor(mant / 256. / 256.);    // first 8 bits of mantissa\n\tfloat mant2 = mod(floor(mant / 256.),256.); // second 8 bits\n\tfloat mant3 = mod(mant,256.);               // third 8 bits\n\n\thighp float sign = 128.-128.*(a/val);\t\t\t// sign bit is 256 or 0\n\thighp float e = (sign+exp+127.)/510.;\t\t// exponent and sign\n\thighp float m1 = (mant1-(128.*(1.-mod(exp+127.,2.))))/255.; // handle leading bit\n\thighp float m2 = (mant2)/255.;\t\t\t\t// middle part\n\thighp float m3 = (mant3+.5)/255.;\t\t\t// scale to 0 - 255\n\n\treturn vec4(m3,m2,m1,e);\n}\n\n// select an element from a vector based on index\nfloat select_index_1604150559(vec4 v, int index){\n\tfloat val;\n\tif (index == 0) {\n\t\tval = v.r;\n\t} else if(index == 1) {\n\t\tval = v.g;\n\t} else if(index == 2) {\n\t\tval = v.b;\n\t} else if(index == 3){\n\t\tval = v.a;\n\t} else {\n\t\t// should never be here\n\t\tval = 0.0;\n\t}\n\n\treturn val;\n}\n\nvoid main(void) {\n\n\t// get the implied row and column from .y and .x of passed (output)\n\t// texture coordinate. These map directly to input texture space when\n\t// the relevant dimensions are the same.\n \tfloat row = outTex.y;\n\tfloat col = outTex.x;\n\n\t// direct usage of col requires output be padded exactly like input\n\tvec4 x = texture2D( X, vec2(col, row));\n\tvec4 y = texture2D( Y, vec2(col, row));\n\tvec4 sum_v = (a * x) + y;\n\tint channel = int(mod(col * float(N), 4.0 ));\n\tfloat sum = select_index_1604150559(sum_v, channel);\n\n\tif (sum == 0.) {\n\t\tgl_FragColor = vec4(0.,0.,0.,0.);\n\t\treturn;\n\t}\n\n \t// output vec4 with bytes for an IEEE754 32-bit floating point number\n\tgl_FragColor = encode_float_1540259130(sum);\n}\n";
 this.standalone?this.program=this.webgl.createProgram(n):this.program=this.webgl.createProgram(p)}t("./webgl");e.exports=r,r.TEXTURE_UNIFORM_NAME_0="X",r.TEXTURE_UNIFORM_NAME_1="Y",r.LENGTH_UNIFORM_NAME="N",r.COEFFICIENT_UNIFORM_NAME="a",r.prototype.calculate=function(t,e,n,o,i){var a=this.webgl.context;this.webgl.selectProgram(this.program),this.bindInputTexture(n,a.TEXTURE0,r.TEXTURE_UNIFORM_NAME_0),this.bindInputTexture(o,a.TEXTURE1,r.TEXTURE_UNIFORM_NAME_1);var s=this.webgl.getPad(t);this.bindUniforms(t+s,e),this.webgl.bindOutputTexture(1,t+s,i),a.drawElements(a.TRIANGLES,6,a.UNSIGNED_SHORT,0),this.webgl.unbindInputTexture(a.TEXTURE0),this.webgl.unbindInputTexture(a.TEXTURE1)},r.prototype.bindInputTexture=function(t,e,n){var r=this.webgl.context,o=this.program;r.activeTexture(e),r.bindTexture(r.TEXTURE_2D,t);var i=r.getUniformLocation(o,n);r.uniform1i(i,e-r.TEXTURE0)},r.prototype.bindUniforms=function(t,e){var n=this.webgl.context,o=n.getUniformLocation(this.program,r.LENGTH_UNIFORM_NAME),i=n.getUniformLocation(this.program,r.COEFFICIENT_UNIFORM_NAME);n.uniform1i(o,t),n.uniform1f(i,e)}},{"./webgl":11}],5:[function(t,e,n){function r(t,e){this.webgl=t,this.standalone=null==e||e;var n="precision highp float;\n#define GLSLIFY 1\n\nvarying vec2      outTex;\t// texture coords of row/column to calculate\nuniform sampler2D X;\t\t// texture with data from padded A\nuniform int       N;\t\t// number of columns\nuniform int       pad;\t\t// additional columns to nearest multiple of four\nuniform float     a; \t\t// lower bound\nuniform float     b; \t\t// upper bound\n\n// Render float to bytes according to IEEE 754 Floating Point\nvec4 encode_float_1604150559(float val) {\n\n\t// TODO: correctly handle denormal numbers\n\t// http://www.2ality.com/2012/04/number-encoding.html\n\tfloat a = abs(val);                           // encode absolute value + sign\n\tfloat exp = floor(log2(a));                 // number of powers of 2\n\tfloat mant = pow(2.,log2(a)-exp) * pow(2.,23.);  // multiply to fill 24 bits (implied leading 1)\n\tfloat mant1 = floor(mant / 256. / 256.);    // first 8 bits of mantissa\n\tfloat mant2 = mod(floor(mant / 256.),256.); // second 8 bits\n\tfloat mant3 = mod(mant,256.);               // third 8 bits\n\n\thighp float sign = 128.-128.*(a/val);\t\t\t// sign bit is 256 or 0\n\thighp float e = (sign+exp+127.)/510.;\t\t// exponent and sign\n\thighp float m1 = (mant1-(128.*(1.-mod(exp+127.,2.))))/255.; // handle leading bit\n\thighp float m2 = (mant2)/255.;\t\t\t\t// middle part\n\thighp float m3 = (mant3+.5)/255.;\t\t\t// scale to 0 - 255\n\n\treturn vec4(m3,m2,m1,e);\n}\n\n// select an element from a vector based on index\nfloat select_index_1540259130(vec4 v, int index){\n\tfloat val;\n\tif (index == 0) {\n\t\tval = v.r;\n\t} else if(index == 1) {\n\t\tval = v.g;\n\t} else if(index == 2) {\n\t\tval = v.b;\n\t} else if(index == 3){\n\t\tval = v.a;\n\t} else {\n\t\t// should never be here\n\t\tval = 0.0;\n\t}\n\n\treturn val;\n}\n\nvoid main(void) {\n\n\t// get the implied row and column from .y and .x of passed (output)\n\t// texture coordinate. These map directly to input texture space when\n\t// the relevant dimensions are the same.\n\tfloat row = outTex.y;\n\tfloat col = outTex.x;\n\n\t// return 0.0 if in padded region of output texture\n\tif(col * float(N + pad) > float(N) ) {\n\t\tgl_FragColor = vec4(0.,0.,0.,0.);\n\t\treturn;\n\t}\n\n\t// direct usage of col requires output be padded exactly like input\n\tvec4 x = texture2D( X, vec2(col, row));\n\tvec4 val = clamp(x, a, b);\n\n\t// select and output channel (standalone version only)\n\tint channel = int(mod(col * float(N + pad), 4.0));\n\tfloat sum = select_index_1540259130(val, channel);\n\n\tif (sum == 0.) {\n\t\tgl_FragColor = vec4(0.,0.,0.,0.);\n\t\treturn;\n\t}\n\n\t// output vec4 with bytes for an IEEE754 32-bit floating point number\n\tgl_FragColor = encode_float_1604150559(sum);\n}\n",r="precision highp float;\n#define GLSLIFY 1\n\nvarying vec2      outTex;\t// texture coords of row/column to calculate\nuniform sampler2D X;\t\t// texture with data from padded A\nuniform int       N;\t\t// number of columns\nuniform int       pad;\t\t// additional columns to nearest multiple of four\nuniform float     a; \t\t// lower bound\nuniform float     b; \t\t// upper bound\n\n// set pad values to 0.0, if in padded region of output texture\nvoid fix_pad_1540259130(inout vec4 v, int pad){\n\tv.a = 0.0;\n\tif(pad == 2){\n\t\tv.b = 0.0;\n\t} else if(pad == 3){\n\t\tv.b = 0.0;\n\t\tv.g = 0.0;\n\t}\n}\n\nvoid main(void) {\n\n\t// get the implied row and column from .y and .x of passed (output)\n\t// texture coordinate. These map directly to input texture space when\n\t// the relevant dimensions are the same.\n\tfloat row_t = outTex.y;\n\tfloat col_t = outTex.x;\n\tfloat col = (col_t * float(N + pad) - 2.0); // index of first element in pixel (matrix space)\n\n\t// direct usage of col requires output be padded exactly like input\n\tvec4 x = texture2D( X, vec2(col_t, row_t));\n\tvec4 val_v = clamp(x, a, b);\n\n\t// is last element in pixel past row length?\n\tif(pad > 0 && (col + 4.0) > float(N) ) {\n\t\t// fix elements in padded region\n\t\tfix_pad_1540259130(val_v, pad);\n\t}\n\n\tgl_FragColor = val_v;\n}\n";this.standalone?this.program=this.webgl.createProgram(n):this.program=this.webgl.createProgram(r)}t("./webgl");e.exports=r,r.TEXTURE_UNIFORM_NAME_0="X",r.LENGTH_UNIFORM_NAME="N",r.LOWER_UNIFORM_NAME="a",r.UPPER_UNIFORM_NAME="b",r.prototype.calculate=function(t,e,n,o,i,a){n=null!=n?n:Number.MIN_VALUE,o=null!=o?o:Number.MAX_VALUE;var s=this.webgl.context;this.webgl.selectProgram(this.program),this.bindInputTexture(i,s.TEXTURE0,r.TEXTURE_UNIFORM_NAME_0);var u=this.webgl.getPad(e);this.bindUniforms(e,u,n,o),this.standalone?this.webgl.bindOutputTexture(t,e+u,a):this.webgl.bindOutputTexture(t,(e+u)/4,a),s.drawElements(s.TRIANGLES,6,s.UNSIGNED_SHORT,0),this.webgl.unbindInputTexture(s.TEXTURE0)},r.prototype.bindInputTexture=function(t,e,n){var r=this.webgl.context,o=this.program;r.activeTexture(e),r.bindTexture(r.TEXTURE_2D,t);var i=r.getUniformLocation(o,n);r.uniform1i(i,e-r.TEXTURE0)},r.prototype.bindUniforms=function(t,e,n,o){var i=this.webgl.context,a=i.getUniformLocation(this.program,r.LENGTH_UNIFORM_NAME),s=i.getUniformLocation(this.program,r.UPPER_UNIFORM_NAME),u=i.getUniformLocation(this.program,r.LOWER_UNIFORM_NAME),l=i.getUniformLocation(this.program,"pad");i.uniform1i(a,t),i.uniform1i(l,e),i.uniform1f(u,n),i.uniform1f(s,o)}},{"./webgl":11}],6:[function(t,e,n){function r(t,e){this.webgl=t,this.standalone=null==e||e;var n="// TODO: unroll loop for stride == factor and small values (2, 3)\nprecision highp float;\n#define GLSLIFY 1\n\nvarying vec2      outTex;  // texture coords of row/column to calculate\nuniform sampler2D X;       // texture with data from padded A\nuniform int       factor;  // width of image patch\nuniform float     stride;  // width between image patches\nuniform float     C;       // number of channels\nuniform float     M;\nuniform float     N;\nuniform float     N_out;\nuniform float     M_out;\n\n// Render float to bytes according to IEEE 754 Floating Point\nvec4 encode_float_1540259130(float val) {\n\n\t// TODO: correctly handle denormal numbers\n\t// http://www.2ality.com/2012/04/number-encoding.html\n\tfloat a = abs(val);                           // encode absolute value + sign\n\tfloat exp = floor(log2(a));                 // number of powers of 2\n\tfloat mant = pow(2.,log2(a)-exp) * pow(2.,23.);  // multiply to fill 24 bits (implied leading 1)\n\tfloat mant1 = floor(mant / 256. / 256.);    // first 8 bits of mantissa\n\tfloat mant2 = mod(floor(mant / 256.),256.); // second 8 bits\n\tfloat mant3 = mod(mant,256.);               // third 8 bits\n\n\thighp float sign = 128.-128.*(a/val);\t\t\t// sign bit is 256 or 0\n\thighp float e = (sign+exp+127.)/510.;\t\t// exponent and sign\n\thighp float m1 = (mant1-(128.*(1.-mod(exp+127.,2.))))/255.; // handle leading bit\n\thighp float m2 = (mant2)/255.;\t\t\t\t// middle part\n\thighp float m3 = (mant3+.5)/255.;\t\t\t// scale to 0 - 255\n\n\treturn vec4(m3,m2,m1,e);\n}\n\n// select an element from a vector based on index\nfloat select_index_1604150559(vec4 v, int index){\n\tfloat val;\n\tif (index == 0) {\n\t\tval = v.r;\n\t} else if(index == 1) {\n\t\tval = v.g;\n\t} else if(index == 2) {\n\t\tval = v.b;\n\t} else if(index == 3){\n\t\tval = v.a;\n\t} else {\n\t\t// should never be here\n\t\tval = 0.0;\n\t}\n\n\treturn val;\n}\n\nvoid main(void) {\n\n\t// get the implied row and column from .y and .x of passed (output)\n\t// texture coordinate and translate to output pixel space.\n\tfloat row = floor(outTex.y * M_out);   // row on output texture (matrix space)\n\tfloat col = floor(outTex.x * N_out); // column on output texture (matrix space)\n\tfloat vcol = floor(col / C);   // virtual column on output texture (matrix space)\n\tfloat vchannel = floor(mod(col, C)); // virtual channel on output texture\n\n\tconst float min = -1.0e+08;\n\tvec4 currentMax = vec4(min, min, min, min);\n\n\tfloat deltaY = 1.0/M;\n\tfloat deltaX = 1.0/N;\n\tfloat y = ((row * stride) + 0.5)*deltaY; // texture position of input row\n\tfloat x;\n\tfloat z = vchannel * deltaX;\n\tfor (int i = 0; i < 100; i += 1) {\n\t\tif (i >= factor) {\n\t\t\tbreak;\n\t\t}\n\t\tx = ((vcol * stride * C) + 0.5) * deltaX; // texture position of input column\n\n\t\tfor (int j = 0; j < 100; j += 1) {\n\t\t\tif (j >= factor) {\n\t\t\t\tbreak;\n\t\t\t}\n\n\t\t\tvec2 coords = vec2(x + z, y);\n\t\t\tvec4 x_v = texture2D(X, coords);\n\t\t\tcurrentMax = max(currentMax, x_v);\n\n\t\t\tx += (deltaX * C);\n\t\t}\n\t\ty += deltaY;\n\t}\n\tint chan = int(mod(outTex.x * N_out, 4.0 ));\n\tfloat val = select_index_1604150559(currentMax, int(chan));\n\tif (val == 0.) {\n\t\tgl_FragColor = vec4(0.,0.,0.,0.);\n\t\treturn;\n\t}\n\n\tgl_FragColor = encode_float_1540259130(val);\n}\n";p="// TODO: unroll loop for stride == factor and small values (2, 3)\nprecision highp float;\n#define GLSLIFY 1\n\nvarying vec2      outTex;  // texture coords of row/column to calculate\nuniform sampler2D X;       // texture with data from padded A\nuniform int       factor;  // width of image patch\nuniform float     stride;  // width between image patches\nuniform float     C;       // number of channels\nuniform float     M;\nuniform float     N;\nuniform float     N_out;\nuniform float     M_out;\n\nvoid main(void) {\n\n\t// get the implied row and column from .y and .x of passed (output)\n\t// texture coordinate and translate to output pixel space.\n\tfloat row = floor(outTex.y * M_out);   // row on output texture (pixel space)\n\tfloat col = floor(outTex.x * N_out); // column on output texture (matrix space)\n\tfloat vcol = floor(col / C);   // virtual column on output texture (matrix space)\n\tfloat vchannel = floor(mod(col, C)); // virtual channel on output texture\n\n\tconst float min = -1.0e+08;\n\tvec4 currentMax = vec4(min, min, min, min);\n\n\tfloat deltaY = 1.0/M;\n\tfloat deltaX = 1.0/N;\n\tfloat y = ((row * stride) + 0.5)*deltaY; // texture position of input row\n\tfloat x;\n\tfloat z = vchannel * deltaX;\n\tfor (int i = 0; i < 100; i += 1) {\n\t\tif (i >= factor) {\n\t\t\tbreak;\n\t\t}\n\t\tx = ((vcol * stride * C) + 0.5) * deltaX; // texture position of input column\n\n\t\tfor (int j = 0; j < 100; j += 1) {\n\t\t\tif (j >= factor) {\n\t\t\t\tbreak;\n\t\t\t}\n\n\t\t\tvec2 coords = vec2(x + z, y);\n\t\t\tvec4 x_v = texture2D(X, coords);\n\t\t\tcurrentMax = max(currentMax, x_v);\n\n\t\t\tx += (deltaX * C);\n\t\t}\n\t\ty += deltaY;\n\t}\n\n\tgl_FragColor = currentMax;\n}\n",this.standalone?this.program=this.webgl.createProgram(n):this.program=this.webgl.createProgram(p)}var o=t("./webgl");e.exports=r,r.TEXTURE_UNIFORM_NAME_0="X",r.INPUT_ROW_COUNT_UNIFORM_NAME="M",r.INPUT_COLUMN_COUNT_UNIFORM_NAME="N",r.OUTPUT_ROW_COUNT_UNIFORM_NAME="M_out",r.OUTPUT_COLUMN_COUNT_UNIFORM_NAME="N_out",r.FACTOR_UNIFORM_NAME="factor",r.STRIDE_UNIFORM_NAME="stride",r.CHANNEL_COUNT_UNIFORM_NAME="C",r.prototype.calculate=function(t,e,n,i,a,s,u){if(n%o.COMPONENTS_PER_TEXEL!=0)throw new Error("Channel count must be a multiple of "+o.COMPONENTS_PER_TEXEL);var l=this.webgl.context,c=(Math.floor((e-i)/a)+1)*n,f=Math.floor((t-i)/a)+1;this.webgl.selectProgram(this.program),this.bindInputTexture(s,l.TEXTURE0,r.TEXTURE_UNIFORM_NAME_0),this.bindUniforms(t,e*n,f,c,i,a,n),this.standalone?this.webgl.bindOutputTexture(f,c,u):this.webgl.bindOutputTexture(f,c/o.COMPONENTS_PER_TEXEL,u),l.drawElements(l.TRIANGLES,6,l.UNSIGNED_SHORT,0),this.webgl.unbindInputTexture(l.TEXTURE0)},r.prototype.bindInputTexture=function(t,e,n){var r=this.webgl.context,o=this.program;r.activeTexture(e),r.bindTexture(r.TEXTURE_2D,t);var i=r.getUniformLocation(o,n);r.uniform1i(i,e-r.TEXTURE0)},r.prototype.bindUniforms=function(t,e,n,o,i,a,s){var u=this.webgl.context,l=u.getUniformLocation(this.program,r.INPUT_ROW_COUNT_UNIFORM_NAME),c=u.getUniformLocation(this.program,r.INPUT_COLUMN_COUNT_UNIFORM_NAME),f=u.getUniformLocation(this.program,r.OUTPUT_ROW_COUNT_UNIFORM_NAME),p=u.getUniformLocation(this.program,r.OUTPUT_COLUMN_COUNT_UNIFORM_NAME),h=u.getUniformLocation(this.program,r.FACTOR_UNIFORM_NAME),d=u.getUniformLocation(this.program,r.STRIDE_UNIFORM_NAME),v=u.getUniformLocation(this.program,r.CHANNEL_COUNT_UNIFORM_NAME);u.uniform1f(l,t),u.uniform1f(c,e),u.uniform1f(f,n),u.uniform1f(p,o),u.uniform1i(h,i),u.uniform1f(d,a),u.uniform1f(v,s)}},{"./webgl":11}],7:[function(t,e,n){function r(t,e){this.webgl=t,this.standalone=null==e||e;var n="// fragment shader that calculates the matrix product and renders each\n// element to the bytes representing a 32-bit IEEE754 floating point in\n// the output RGBA canvas.\n// readPixel is used to read the bytes.\n\nprecision highp float;\n#define GLSLIFY 1\n\nvarying vec2      outTex;\t// texture coords of row/column to calculate\nuniform sampler2D A;\t\t// texture with data from padded A\nuniform sampler2D B_t;\t\t// texture with data from padded transpose of B\nuniform int       K;\t\t// number of elements in shared dimension\nuniform int       N;\t\t// number of columns in output\nuniform int       pad;\t\t//\nuniform float     alpha; \t// coefficient to multiplication\n\n// sum of products between elements in row i (from A) x col j (from B)\n\n// Calculate the dot product between the row (from A) and column (from B)\n// identified by the passed indeces (output texture coordinate space).\n// We loop over elements in the row and column and sum the product\n// using the glsl `dot` function to process four elements at a time.\n// This four element optimization requires that the matrix B be\n// transposed before texel packing and that both matrices be padded\n// (with zeros) to a multiple of four (4) in their shared dimension.\nfloat dot_rowcol_1540259130(float y, float x, sampler2D A, sampler2D B_t, int K) {\n\tfloat delta_t = 1./float(K);// space (on texture) between elements\n\tfloat sum = 0.;\t\t\t// sum for this row/column pair\n\tfloat z = 0.5 * (4.0 * delta_t);// position for shared dimension on source textures\n\n\tfor (int l=0 ; l<4096 ; ++l) {\n\t\tif(l >= K / 4) break;    // stop when we finish the row/column\n\t\t// l is in pixel space, so we divide by four\n\n\t\t// retrieve next four elements from each texture\n\t\tvec4 a_ik = texture2D(  A, vec2(z, y));\n\t\tvec4 b_kj = texture2D(B_t, vec2(z, x));\n\n\t// use `dot` to process four elements at a time\n\t\tsum +=  dot(a_ik, b_kj);\n\t\tz += (4.0 * delta_t);      // (z + 0.5)*delta\n\t}\n\treturn sum;\n}\n\n// Render float to bytes according to IEEE 754 Floating Point\nvec4 encode_float_1604150559(float val) {\n\n\t// TODO: correctly handle denormal numbers\n\t// http://www.2ality.com/2012/04/number-encoding.html\n\tfloat a = abs(val);                           // encode absolute value + sign\n\tfloat exp = floor(log2(a));                 // number of powers of 2\n\tfloat mant = pow(2.,log2(a)-exp) * pow(2.,23.);  // multiply to fill 24 bits (implied leading 1)\n\tfloat mant1 = floor(mant / 256. / 256.);    // first 8 bits of mantissa\n\tfloat mant2 = mod(floor(mant / 256.),256.); // second 8 bits\n\tfloat mant3 = mod(mant,256.);               // third 8 bits\n\n\thighp float sign = 128.-128.*(a/val);\t\t\t// sign bit is 256 or 0\n\thighp float e = (sign+exp+127.)/510.;\t\t// exponent and sign\n\thighp float m1 = (mant1-(128.*(1.-mod(exp+127.,2.))))/255.; // handle leading bit\n\thighp float m2 = (mant2)/255.;\t\t\t\t// middle part\n\thighp float m3 = (mant3+.5)/255.;\t\t\t// scale to 0 - 255\n\n\treturn vec4(m3,m2,m1,e);\n}\n\nvoid main(void) {\n\n\t// get the implied row and column from .y and .x of passed (output)\n\t// texture coordinate. These map directly to input texture space when\n\t// the relevant dimensions are the same.\n\tfloat row_t = outTex.y;\n\tfloat col_t = outTex.x;\n\n\t// sum row x col for the passed pixel\n\tfloat sum = alpha * dot_rowcol_1540259130(row_t, col_t * float(N + pad)/float(N), A, B_t, K);\n\n\tif (sum == 0.) {\n\t\tgl_FragColor = vec4(0.,0.,0.,0.);\n\t\treturn;\n\t}\n\n\t// output vec4 with bytes for an IEEE754 32-bit floating point number\n\tgl_FragColor = encode_float_1604150559(sum);\n}\n",r="// fragment shader that calculates the matrix product (with additive 'C' term)\n// and renders each element to the bytes representing a 32-bit IEEE754 floating\n// point in the output RGBA canvas.\n// readPixel is used to read the bytes.\n\nprecision highp float;\n#define GLSLIFY 1\n\nvarying vec2      outTex;\t// texture coords of row/column to calculate\nuniform sampler2D A;\t\t// texture with data from padded A\nuniform sampler2D B_t;\t\t// texture with data from padded transpose of B\nuniform sampler2D C;\t\t// texture with data from C\nuniform int       K;\t\t// number of elements in shared dimension\nuniform int       N;\t\t// number of columns in output\nuniform int       pad;\t\t//\nuniform float     alpha; \t// coefficient to multiplication\nuniform float     beta; \t// coefficient to additive term\n\n// sum of products between elements in row i (from A) x col j (from B)\n\n// Calculate the dot product between the row (from A) and column (from B)\n// identified by the passed indeces (output texture coordinate space).\n// We loop over elements in the row and column and sum the product\n// using the glsl `dot` function to process four elements at a time.\n// This four element optimization requires that the matrix B be\n// transposed before texel packing and that both matrices be padded\n// (with zeros) to a multiple of four (4) in their shared dimension.\nfloat dot_rowcol_1540259130(float y, float x, sampler2D A, sampler2D B_t, int K) {\n\tfloat delta_t = 1./float(K);// space (on texture) between elements\n\tfloat sum = 0.;\t\t\t// sum for this row/column pair\n\tfloat z = 0.5 * (4.0 * delta_t);// position for shared dimension on source textures\n\n\tfor (int l=0 ; l<4096 ; ++l) {\n\t\tif(l >= K / 4) break;    // stop when we finish the row/column\n\t\t// l is in pixel space, so we divide by four\n\n\t\t// retrieve next four elements from each texture\n\t\tvec4 a_ik = texture2D(  A, vec2(z, y));\n\t\tvec4 b_kj = texture2D(B_t, vec2(z, x));\n\n\t// use `dot` to process four elements at a time\n\t\tsum +=  dot(a_ik, b_kj);\n\t\tz += (4.0 * delta_t);      // (z + 0.5)*delta\n\t}\n\treturn sum;\n}\n\n// Render float to bytes according to IEEE 754 Floating Point\nvec4 encode_float_1117569599(float val) {\n\n\t// TODO: correctly handle denormal numbers\n\t// http://www.2ality.com/2012/04/number-encoding.html\n\tfloat a = abs(val);                           // encode absolute value + sign\n\tfloat exp = floor(log2(a));                 // number of powers of 2\n\tfloat mant = pow(2.,log2(a)-exp) * pow(2.,23.);  // multiply to fill 24 bits (implied leading 1)\n\tfloat mant1 = floor(mant / 256. / 256.);    // first 8 bits of mantissa\n\tfloat mant2 = mod(floor(mant / 256.),256.); // second 8 bits\n\tfloat mant3 = mod(mant,256.);               // third 8 bits\n\n\thighp float sign = 128.-128.*(a/val);\t\t\t// sign bit is 256 or 0\n\thighp float e = (sign+exp+127.)/510.;\t\t// exponent and sign\n\thighp float m1 = (mant1-(128.*(1.-mod(exp+127.,2.))))/255.; // handle leading bit\n\thighp float m2 = (mant2)/255.;\t\t\t\t// middle part\n\thighp float m3 = (mant3+.5)/255.;\t\t\t// scale to 0 - 255\n\n\treturn vec4(m3,m2,m1,e);\n}\n\n// select an element from a vector based on index\nfloat select_index_1604150559(vec4 v, int index){\n\tfloat val;\n\tif (index == 0) {\n\t\tval = v.r;\n\t} else if(index == 1) {\n\t\tval = v.g;\n\t} else if(index == 2) {\n\t\tval = v.b;\n\t} else if(index == 3){\n\t\tval = v.a;\n\t} else {\n\t\t// should never be here\n\t\tval = 0.0;\n\t}\n\n\treturn val;\n}\n\nvoid main(void) {\n\n\t// get the implied row and column from .y and .x of passed (output)\n\t// texture coordinate. These map directly to input texture space when\n\t// the relevant dimensions are the same.\n\tfloat row_t = outTex.y;\n\tfloat col_t = outTex.x;\n\tvec4 c_vec = texture2D(C, vec2(col_t, 0.5));\n\n\t// should be -0.5, but that subtly breaks at zero\n\tfloat col = col_t * float(N + pad); // index of first element in pixel (matrix space)\n\tint channel = int(mod(col, 4.0 ));\n\tfloat c = select_index_1604150559(c_vec, channel);\n\n\t// sum row x col for the passed pixel\n\tfloat sum = alpha * dot_rowcol_1540259130(row_t, col_t * float(N + pad)/float(N), A, B_t, K);\n\tsum += beta * c;\n\n\tif (sum == 0.) {\n\t\tgl_FragColor = vec4(0.,0.,0.,0.);\n\t\treturn;\n\t}\n\n\t// output vec4 with bytes for an IEEE754 32-bit floating point number\n\tgl_FragColor = encode_float_1117569599(sum);\n}\n",o="// fragment shader that calculates the matrix product and writes each\n// element to a pixel component in a floating point texture.\n// the output RGBA canvas.\n// readPixel is used to read the bytes.\n\nprecision highp float;\n#define GLSLIFY 1\n\nvarying vec2      outTex;\t// texture coords of row/column to calculate\nuniform sampler2D A;\t\t// texture with data from padded A\nuniform sampler2D B_t;\t\t// texture with data from padded transpose of B\nuniform int       K;\t\t// number of elements in shared dimension\nuniform int       N;\t\t// number of columns in output\nuniform int       pad;\t\t//\nuniform float     alpha; \t// coefficient to multiplication\n\n// sum of products between elements in row i (from A) x col j (from B)\n\n// Calculate the dot product between the row (from A) and column (from B)\n// identified by the passed indeces (output texture coordinate space).\n// We loop over elements in the row and column and sum the product\n// using the glsl `dot` function to process four elements at a time.\n// This four element optimization requires that the matrix B be\n// transposed before texel packing and that both matrices be padded\n// (with zeros) to a multiple of four (4) in their shared dimension.\nfloat dot_rowcol_1540259130(float y, float x, sampler2D A, sampler2D B_t, int K) {\n\tfloat delta_t = 1./float(K);// space (on texture) between elements\n\tfloat sum = 0.;\t\t\t// sum for this row/column pair\n\tfloat z = 0.5 * (4.0 * delta_t);// position for shared dimension on source textures\n\n\tfor (int l=0 ; l<4096 ; ++l) {\n\t\tif(l >= K / 4) break;    // stop when we finish the row/column\n\t\t// l is in pixel space, so we divide by four\n\n\t\t// retrieve next four elements from each texture\n\t\tvec4 a_ik = texture2D(  A, vec2(z, y));\n\t\tvec4 b_kj = texture2D(B_t, vec2(z, x));\n\n\t// use `dot` to process four elements at a time\n\t\tsum +=  dot(a_ik, b_kj);\n\t\tz += (4.0 * delta_t);      // (z + 0.5)*delta\n\t}\n\treturn sum;\n}\n\nvoid main(void) {\n\n\t// get the implied row and column from .y and .x of passed (output)\n\t// texture coordinate. These map directly to input texture space when\n\t// the relevant dimensions are the same.\n\tfloat row_t = outTex.y;\n\tfloat col_t = outTex.x;\n\n\tvec4 sum_v = vec4(0.0, 0.0, 0.0, 0.0);\n\tfloat col = (col_t * float(N + pad) - 2.0); // index of first element in pixel (matrix space)\n\tsum_v.r = alpha * dot_rowcol_1540259130(row_t, (col + 0.5)/float(N), A, B_t, K);\n\t// is last element in pixel past row length?\n\tif(pad > 0 && (col + 4.0) > float(N) ) {\n\t\t// compute elements in padded region\n\t\tif(pad < 3){\n\t\t\tsum_v.g = alpha * dot_rowcol_1540259130(row_t, (col + 1.5)/float(N), A, B_t, K);\n\t\t}\n\t\tif(pad < 2){\n\t\t\tsum_v.b = alpha * dot_rowcol_1540259130(row_t, (col + 2.5)/float(N), A, B_t, K);\n\t\t}\n\t} else {\n\t\tsum_v.g = alpha * dot_rowcol_1540259130(row_t, (col + 1.5)/float(N), A, B_t, K);\n\t\tsum_v.b = alpha * dot_rowcol_1540259130(row_t, (col + 2.5)/float(N), A, B_t, K);\n\t\tsum_v.a = alpha * dot_rowcol_1540259130(row_t, (col + 3.5)/float(N), A, B_t, K);\n\t}\n\n\tgl_FragColor = sum_v;\n}\n",i="// fragment shader that calculates the matrix product and writes each\n// element to a pixel component in a floating point texture.\n// the output RGBA canvas.\n// readPixel is used to read the bytes.\n\nprecision highp float;\n#define GLSLIFY 1\n\nvarying vec2      outTex;\t// texture coords of row/column to calculate\nuniform sampler2D A;\t\t// texture with data from padded A\nuniform sampler2D B_t;\t\t// texture with data from padded transpose of B\nuniform sampler2D C;\t\t// texture with data from C\nuniform int       K;\t\t// number of elements in shared dimension\nuniform int       N;\t\t// number of columns in output\nuniform int       pad;\t\t//\nuniform float     alpha; \t// coefficient to multiplication\nuniform float     beta; \t// coefficient to addition\n\n// sum of products between elements in row i (from A) x col j (from B)\n\n// Calculate the dot product between the row (from A) and column (from B)\n// identified by the passed indeces (output texture coordinate space).\n// We loop over elements in the row and column and sum the product\n// using the glsl `dot` function to process four elements at a time.\n// This four element optimization requires that the matrix B be\n// transposed before texel packing and that both matrices be padded\n// (with zeros) to a multiple of four (4) in their shared dimension.\nfloat dot_rowcol_1540259130(float y, float x, sampler2D A, sampler2D B_t, int K) {\n\tfloat delta_t = 1./float(K);// space (on texture) between elements\n\tfloat sum = 0.;\t\t\t// sum for this row/column pair\n\tfloat z = 0.5 * (4.0 * delta_t);// position for shared dimension on source textures\n\n\tfor (int l=0 ; l<4096 ; ++l) {\n\t\tif(l >= K / 4) break;    // stop when we finish the row/column\n\t\t// l is in pixel space, so we divide by four\n\n\t\t// retrieve next four elements from each texture\n\t\tvec4 a_ik = texture2D(  A, vec2(z, y));\n\t\tvec4 b_kj = texture2D(B_t, vec2(z, x));\n\n\t// use `dot` to process four elements at a time\n\t\tsum +=  dot(a_ik, b_kj);\n\t\tz += (4.0 * delta_t);      // (z + 0.5)*delta\n\t}\n\treturn sum;\n}\n\nvoid main(void) {\n\n\t// get the implied row and column from .y and .x of passed (output)\n\t// texture coordinate. These map directly to input texture space when\n\t// the relevant dimensions are the same.\n\tfloat row_t = outTex.y;\n\tfloat col_t = outTex.x;\n\tvec4 c_v = texture2D(C, vec2(col_t, 0.5));\n\n\tvec4 sum_v = vec4(0.0, 0.0, 0.0, 0.0);\n\tfloat col = (col_t * float(N + pad) - 2.0); // index of first element in pixel (matrix space)\n\tsum_v.r = alpha * dot_rowcol_1540259130(row_t, (col + 0.5)/float(N), A, B_t, K);\n\t// in the padding region?\n\tif(pad > 0 && (col + 4.0) > float(N) ) {\n\t\t// pad\n\t\tif(pad < 3){\n\t\t\tsum_v.g = alpha * dot_rowcol_1540259130(row_t, (col + 1.5)/float(N), A, B_t, K);\n\t\t}\n\t\tif(pad < 2){\n\t\t\tsum_v.b = alpha * dot_rowcol_1540259130(row_t, (col + 2.5)/float(N), A, B_t, K);\n\t\t}\n\t} else {\n\t\tsum_v.g = alpha * dot_rowcol_1540259130(row_t, (col + 1.5)/float(N), A, B_t, K);\n\t\tsum_v.b = alpha * dot_rowcol_1540259130(row_t, (col + 2.5)/float(N), A, B_t, K);\n\t\tsum_v.a = alpha * dot_rowcol_1540259130(row_t, (col + 3.5)/float(N), A, B_t, K);\n\t}\n\n\tgl_FragColor = sum_v + beta*c_v;\n}\n";this.standalone?(this.program_=this.webgl.createProgram(n),this.program_c=this.webgl.createProgram(r)):(this.program_=this.webgl.createProgram(o),this.program_c=this.webgl.createProgram(i))}t("./webgl");e.exports=r,r.TEXTURE_UNIFORM_NAME_0="A",r.TEXTURE_UNIFORM_NAME_1="B_t",r.TEXTURE_UNIFORM_NAME_2="C",r.SHARED_LENGTH_UNIFORM_NAME="K",r.COLUMN_COUNT_UNIFORM_NAME="N",r.PAD_UNIFORM_NAME="pad",r.ALPHA_UNIFORM_NAME="alpha",r.BETA_UNIFORM_NAME="beta",r.prototype.calculate=function(t,e,n,o,i,a,s,u,l){var c=this.webgl.context;null!=u?this.program=this.program_c:(s=null,this.program=this.program_),this.webgl.selectProgram(this.program),this.bindInputTexture(i,c.TEXTURE0,r.TEXTURE_UNIFORM_NAME_0),this.bindInputTexture(a,c.TEXTURE1,r.TEXTURE_UNIFORM_NAME_1),null!=u&&this.bindInputTexture(u,c.TEXTURE2,r.TEXTURE_UNIFORM_NAME_2);var f=this.webgl.getPad(n),p=this.webgl.getPad(e);this.bindUniforms(e,n+f,p,o,s),this.standalone?this.webgl.bindOutputTexture(t,e+p,l):this.webgl.bindOutputTexture(t,(e+p)/4,l),c.drawElements(c.TRIANGLES,6,c.UNSIGNED_SHORT,0),this.webgl.unbindInputTexture(c.TEXTURE0),this.webgl.unbindInputTexture(c.TEXTURE1),this.webgl.unbindInputTexture(c.TEXTURE2)},r.prototype.bindInputTexture=function(t,e,n){var r=this.webgl.context,o=this.program;r.activeTexture(e),r.bindTexture(r.TEXTURE_2D,t);var i=r.getUniformLocation(o,n);r.uniform1i(i,e-r.TEXTURE0)},r.prototype.bindUniforms=function(t,e,n,o,i){var a=this.webgl.context,s=a.getUniformLocation(this.program,r.SHARED_LENGTH_UNIFORM_NAME),u=a.getUniformLocation(this.program,r.ALPHA_UNIFORM_NAME),l=a.getUniformLocation(this.program,r.BETA_UNIFORM_NAME),c=a.getUniformLocation(this.program,r.COLUMN_COUNT_UNIFORM_NAME),f=f=a.getUniformLocation(this.program,r.PAD_UNIFORM_NAME);a.uniform1f(l,i),a.uniform1i(c,t),a.uniform1i(f,n),a.uniform1i(s,e),a.uniform1f(u,o)}},{"./webgl":11}],8:[function(t,e,n){function r(t,e){this.webgl=t,this.standalone=null==e||e;var n="precision highp float;\n#define GLSLIFY 1\n\nvarying vec2      outTex;  // texture coords of row/column to calculate\nuniform sampler2D X;       // texture with data from padded A\nuniform float     factor;  // width of image patch\nuniform float     stride;  // width between image patches\nuniform float     margin;\nuniform float     N_p;     // patches across\nuniform float     M;\nuniform float     N;\nuniform float     pad;\nuniform float     M_in;\nuniform float     N_in;\nuniform float     C;       // number of channels in input\nuniform float     pad_in;\n\n// select an element from a vector based on index\nfloat select_index_1540259130(vec4 v, int index){\n\tfloat val;\n\tif (index == 0) {\n\t\tval = v.r;\n\t} else if(index == 1) {\n\t\tval = v.g;\n\t} else if(index == 2) {\n\t\tval = v.b;\n\t} else if(index == 3){\n\t\tval = v.a;\n\t} else {\n\t\t// should never be here\n\t\tval = 0.0;\n\t}\n\n\treturn val;\n}\n\n// translate a linear index into x, y coordinates for a matrix\nvec2 linear_index_coords_1604150559(float linear_index, float row_length){\n\tvec2 coords;\n\n\tcoords.x = floor(mod(linear_index + 0.5, row_length)); // column\n\tcoords.y = floor((linear_index + 0.5) / row_length); // row\n\n\treturn coords;\n}\n\n// set pad values to 0.0, if in padded region of output texture\nvoid fix_pad_1117569599(inout vec4 v, int pad){\n\tv.a = 0.0;\n\tif(pad == 2){\n\t\tv.b = 0.0;\n\t} else if(pad == 3){\n\t\tv.b = 0.0;\n\t\tv.g = 0.0;\n\t}\n}\n\nvoid main(void) {\n\n\t// get the implied row and column from .y and .x of passed (output)\n\t// texture coordinate\n\tfloat row_t = outTex.y;\n\tfloat col_t = outTex.x;\n\n\t// row corresponds to patch\n\tfloat row = floor(row_t * M) + 0.5;\n\t// column corresponds to placement in patch\n\tfloat col_0 = floor(col_t * (N + pad) - 1.5); // index of first element in output pixel (matrix space)\n\n\t// N_p = patches across\n\tfloat col_patch = floor(mod(row, N_p)); // column index in grid of patches\n\tfloat row_patch = floor(row / N_p); // row index in grid of patches\n\tfloat col_in_0 = (col_patch * stride - margin) * C; // input column index of left element in patch\n\tfloat row_in_0 = row_patch * stride - margin; // input row index of top element in patch\n\n\tvec4 pixel_in;\n\tvec4 result = vec4(0.0, 0.0, 0.0, 0.0);\n\tvec2 coords = linear_index_coords_1604150559(col_0, factor * C); // coords inside patch\n\tvec2 ncoords;\n\tint channel_in = int(mod(col_in_0 + coords.x, 4.0));\n\tvec2 scale_in = vec2(1.0/(N_in + pad_in), 1.0/M_in); // scale from matrix to input texture coords\n\tvec2 offset_in = vec2(col_in_0 + 2.0 - float(channel_in), row_in_0 + 0.5); // offset into patch (and pixel)\n\n\tconst vec2 pixel_scale = vec2(1.0/4.0, 1.0); // scale from matrix to pixel coords\n\n\tpixel_in = texture2D(X, (coords + offset_in) * scale_in);\n\n\t// go through channels for current output pixel\n\tfor(int channel = 0; channel < 4; channel++){\n\n\t\t// are we on a new input pixel?\n\t\tncoords = linear_index_coords_1604150559(col_0 + float(channel), factor * C);\n\n\t\t// are we in the margin or outside the input texture?\n\t\tif((col_in_0 + ncoords.x + 0.5 < 0.0) || (row_in_0 + ncoords.y + 0.5 < 0.0) ||\n\t\t   (col_in_0 + ncoords.x + 0.5) > (N_in) || row_in_0 + ncoords.y + 0.5 > M_in){\n\t\t\t// yes, create a virtual pixel\n\t\t\tpixel_in = vec4(0.0, 0.0, 0.0, 0.0);\n\t\t} else if(floor(ncoords * pixel_scale) != floor(coords * pixel_scale)){\n\t\t\t// no, get the get the next real pixel\n\t\t\tcoords = ncoords;\n\t\t\toffset_in.x += float(channel_in);\n\t\t\tchannel_in = 0;\n\t\t\tpixel_in = texture2D(X, (coords + offset_in) * scale_in);\n\t\t}\n\n\t\tif(channel == 0){\n\t\t\tresult.r = select_index_1540259130(pixel_in, channel_in);\n\t\t} else if(channel == 1){\n\t\t\tresult.g = select_index_1540259130(pixel_in, channel_in);\n\t\t} else if(channel == 2){\n\t\t\tresult.b = select_index_1540259130(pixel_in, channel_in);\n\t\t} else {\n\t\t\tresult.a = select_index_1540259130(pixel_in, channel_in);\n\t\t}\n\n\t\tchannel_in++;\n\t\toffset_in.x -= 1.0;\n\t}\n\n\t// fix padded region\n\tif(pad > 0.0 && col_0 + 4.0 > N ) {\n\t\tfix_pad_1117569599(result, int(pad));\n\t}\n\n\t//gl_FragColor = vec4(row_in_0, col_in_0, channel_in, N_p);\n\tgl_FragColor = result;\n}\n";
 this.standalone?this.program=this.webgl.createProgram(s):this.program=this.webgl.createProgram(n)}t("./webgl");e.exports=r,r.TEXTURE_UNIFORM_NAME_0="X",r.STRIDE_UNIFORM_NAME="stride",r.KERNEL_WIDTH_UNIFORM_NAME="factor",r.prototype.calculate=function(t,e,n,o,i,a,s,u,l,c,f){var p=this.webgl.context,h=this.webgl.getPad(e*n),d=this.webgl.getPad(i);this.webgl.selectProgram(this.program),this.bindInputTexture(c,p.TEXTURE0,r.TEXTURE_UNIFORM_NAME_0),this.bindUniforms(o,i,d,t,e*n,n,h,a,s,u,l),this.standalone?this.webgl.bindOutputTexture(o,i+d,f):this.webgl.bindOutputTexture(o,(i+d)/4,f),p.drawElements(p.TRIANGLES,6,p.UNSIGNED_SHORT,0),this.webgl.unbindInputTexture(p.TEXTURE0)},r.prototype.bindInputTexture=function(t,e,n){var r=this.webgl.context,o=this.program;r.activeTexture(e),r.bindTexture(r.TEXTURE_2D,t);var i=r.getUniformLocation(o,n);r.uniform1i(i,e-r.TEXTURE0)},r.prototype.bindUniforms=function(t,e,n,o,i,a,s,u,l,c,f){var p=this.webgl.context,h=p.getUniformLocation(this.program,"M"),d=p.getUniformLocation(this.program,"N"),v=p.getUniformLocation(this.program,"C"),m=p.getUniformLocation(this.program,"M_in"),_=p.getUniformLocation(this.program,"N_in"),g=p.getUniformLocation(this.program,r.STRIDE_UNIFORM_NAME),y=p.getUniformLocation(this.program,r.KERNEL_WIDTH_UNIFORM_NAME),b=p.getUniformLocation(this.program,"pad"),w=p.getUniformLocation(this.program,"pad_in"),x=p.getUniformLocation(this.program,"N_p");margin_gl=p.getUniformLocation(this.program,"margin"),p.uniform1f(h,t),p.uniform1f(d,e),p.uniform1f(b,n),p.uniform1f(m,o),p.uniform1f(_,i),p.uniform1f(v,a),p.uniform1f(w,s),p.uniform1f(x,u),p.uniform1f(y,l),p.uniform1f(g,c),p.uniform1f(margin_gl,f)}},{"./webgl":11}],9:[function(t,e,n){function r(t,e){this.webgl=t,this.standalone=null==e||e;var n="precision highp float;\n#define GLSLIFY 1\n\nvarying vec2      outTex;\t// texture coords of row/column to calculate\nuniform sampler2D X;\t\t// texture with data from padded X\nuniform int       N;\t\t// number of columns\nuniform int       pad;\t\t// additional columns to nearest multiple of four\nuniform float     b; \t\t// additive term\nuniform float     a; \t\t// multiplicative term\n\n// Render float to bytes according to IEEE 754 Floating Point\nvec4 encode_float_1540259130(float val) {\n\n\t// TODO: correctly handle denormal numbers\n\t// http://www.2ality.com/2012/04/number-encoding.html\n\tfloat a = abs(val);                           // encode absolute value + sign\n\tfloat exp = floor(log2(a));                 // number of powers of 2\n\tfloat mant = pow(2.,log2(a)-exp) * pow(2.,23.);  // multiply to fill 24 bits (implied leading 1)\n\tfloat mant1 = floor(mant / 256. / 256.);    // first 8 bits of mantissa\n\tfloat mant2 = mod(floor(mant / 256.),256.); // second 8 bits\n\tfloat mant3 = mod(mant,256.);               // third 8 bits\n\n\thighp float sign = 128.-128.*(a/val);\t\t\t// sign bit is 256 or 0\n\thighp float e = (sign+exp+127.)/510.;\t\t// exponent and sign\n\thighp float m1 = (mant1-(128.*(1.-mod(exp+127.,2.))))/255.; // handle leading bit\n\thighp float m2 = (mant2)/255.;\t\t\t\t// middle part\n\thighp float m3 = (mant3+.5)/255.;\t\t\t// scale to 0 - 255\n\n\treturn vec4(m3,m2,m1,e);\n}\n\n// select an element from a vector based on index\nfloat select_index_1604150559(vec4 v, int index){\n\tfloat val;\n\tif (index == 0) {\n\t\tval = v.r;\n\t} else if(index == 1) {\n\t\tval = v.g;\n\t} else if(index == 2) {\n\t\tval = v.b;\n\t} else if(index == 3){\n\t\tval = v.a;\n\t} else {\n\t\t// should never be here\n\t\tval = 0.0;\n\t}\n\n\treturn val;\n}\n\nvoid main(void) {\n\n\t// get the implied row and column from .y and .x of passed (output)\n\t// texture coordinate. These map directly to input texture space when\n\t// the relevant dimensions are the same.\n \tfloat row = outTex.y;\n\tfloat col = outTex.x;\n\n\t// direct usage of col requires output be padded exactly like input\n\tvec4 x = texture2D( X, vec2(col, row));\n\tvec4 sum_v = (a * x) + b;\n\tint channel = int(mod(col * float(N + pad), 4.0 ));\n\tfloat sum = select_index_1604150559(sum_v, channel);\n\n\tif (sum == 0.) {\n\t\tgl_FragColor = vec4(0.,0.,0.,0.);\n\t\treturn;\n\t}\n\n \t// output vec4 with bytes for an IEEE754 32-bit floating point number\n\tgl_FragColor = encode_float_1540259130(sum);\n}\n",r="precision highp float;\n#define GLSLIFY 1\n\nvarying vec2      outTex;\t// texture coords of row/column to calculate\nuniform sampler2D X;\t\t// texture with data from padded X\nuniform int       N;\t\t// number of columns\nuniform int       pad;\t\t// additional columns to nearest multiple of four\nuniform float     b; \t\t// additive term\nuniform float     a; \t\t// multiplicative term\n\n// set pad values to 0.0, if in padded region of output texture\nvoid fix_pad_1540259130(inout vec4 v, int pad){\n\tv.a = 0.0;\n\tif(pad == 2){\n\t\tv.b = 0.0;\n\t} else if(pad == 3){\n\t\tv.b = 0.0;\n\t\tv.g = 0.0;\n\t}\n}\n\nvoid main(void) {\n\n\t// get the implied row and column from .y and .x of passed (output)\n\t// texture coordinate. These map directly to input texture space when\n\t// the relevant dimensions are the same.\n\tfloat row_t = outTex.y;\n\tfloat col_t = outTex.x;\n\tfloat col = (col_t * float(N + pad) - 2.0); // index of first element in pixel (matrix space)\n\n\t// direct usage of col requires output be padded exactly like input\n\tvec4 x = texture2D( X, vec2(col_t, row_t));\n\tvec4 sum_v = (a * x) + b;\n\n\t// fix padded region\n\tif(pad > 0 && col + 4.0 > float(N) ) {\n\t\tfix_pad_1540259130(sum_v, pad);\n\t}\n\n\tgl_FragColor = sum_v;\n}\n";this.standalone?this.program=this.webgl.createProgram(n):this.program=this.webgl.createProgram(r)}t("./webgl");e.exports=r,r.TEXTURE_UNIFORM_NAME_0="X",r.LENGTH_UNIFORM_NAME="N",r.ADD_UNIFORM_NAME="b",r.MUL_UNIFORM_NAME="a",r.prototype.calculate=function(t,e,n,o,i,a){var s=this.webgl.context,u=this.webgl.getPad(e);this.webgl.selectProgram(this.program),this.bindInputTexture(i,s.TEXTURE0,r.TEXTURE_UNIFORM_NAME_0),this.bindUniforms(e,u,n,o),this.standalone?this.webgl.bindOutputTexture(t,e+u,a):this.webgl.bindOutputTexture(t,(e+u)/4,a),s.drawElements(s.TRIANGLES,6,s.UNSIGNED_SHORT,0),this.webgl.unbindInputTexture(s.TEXTURE0)},r.prototype.bindInputTexture=function(t,e,n){var r=this.webgl.context,o=this.program;r.activeTexture(e),r.bindTexture(r.TEXTURE_2D,t);var i=r.getUniformLocation(o,n);r.uniform1i(i,e-r.TEXTURE0)},r.prototype.bindUniforms=function(t,e,n,o){var i=this.webgl.context,a=i.getUniformLocation(this.program,r.LENGTH_UNIFORM_NAME),s=i.getUniformLocation(this.program,r.ADD_UNIFORM_NAME),u=i.getUniformLocation(this.program,r.MUL_UNIFORM_NAME),l=i.getUniformLocation(this.program,"pad");i.uniform1i(a,t),i.uniform1i(l,e),i.uniform1f(u,n),i.uniform1f(s,o)}},{"./webgl":11}],10:[function(t,e,n){function r(t,e){if(2!=t.length)throw new Error("Only Tensor of order two (matrix) is supported right now.");var n=t[0],r=t[1];this.texture=i.createDataTexture(n,r,e),this.shape=[n,r],this[Symbol.toStringTag]="Tensor"}var o=t("./globals"),i=o.gl;e.exports=r,r.prototype.delete=function(){i.context.deleteTexture(this.texture),this.texture=null,this.shape=null},r.prototype.transfer=function(t){var e,n,r=this.shape[0],o=this.shape[1];return e=i.createOutputTexture(r,o),i.encode(r,o,this.texture,e),n=new Float32Array(i.readData(r,o)),i.context.deleteTexture(e),t||this.delete(),n},r.prototype.reshape=function(t,e){var n=this.shape[0],o=this.shape[1],a=t[0],s=t[1],u=new r(t,null);return i.reshape(n,o,a,s,this.texture,u.texture),e||this.delete(),u},r.prototype.transpose=function(t){var e=this.shape[0],n=this.shape[1],o=new r([n,e],null);return i.transpose(e,n,this.texture,o.texture),t||this.delete(),o},r.prototype.split=function(t,e){var n=this.shape[0],o=this.shape[1];if(o%2!==0)throw new Error("row count must be multiple of two.");var a=new r([n,o/2],null),s=new r([n,o/2],null);return i.submatrix(o,n,o/2,t,0,this.texture,a.texture),i.submatrix(o,n,o/2,t,1,this.texture,s.texture),e||this.delete(),[a,s]},r.combine=function(t,e,n,o){var a=t.shape[0],s=t.shape[1];if(t.shape[1]!==e.shape[1]||t.shape[0]!==e.shape[0])throw new Error("row and column counts must be equal.");if(n%4!==0)throw new Error("stride must be a multiple of four");var u=new r([a,2*s],null);return i.combine(a,s,n,t.texture,e.texture,u.texture),o||(t.delete(),e.delete()),u}},{"./globals":2}],11:[function(t,e,n){function r(t){var e,n;if(t=t||{},"undefined"==typeof t.canvas?this.canvas=document.createElement("canvas"):this.canvas=t.canvas,e={premultipliedAlpha:!1,preserveDrawingBuffer:!1},this.context=this.canvas.getContext("experimental-webgl",e),null==this.context)throw new Error("No support for Webgl.");try{n=this.context.getExtension("OES_texture_float")}catch(t){}null==n?(console.log("No support for OES_texture_float extension!"),this.hasFloat=!1):this.hasFloat=!0;var r=this.context.getShaderPrecisionFormat(this.context.FRAGMENT_SHADER,this.context.HIGH_FLOAT);this.hasHighPrecision=0!=r.precision,this.hasHighPrecision&&(this.highp=r);var o="// vertex shader for a single quad\n// work is performed in the operation specific texture shader\n\nprecision highp float;\n#define GLSLIFY 1\n\nattribute vec3 pos;\nattribute vec2 tex;\nvarying vec2   outTex;\nvoid main(void)\n{\n\t// just pass the position and texture coords\n\tgl_Position = vec4(pos, 1.0);\n\toutTex = tex;\n}\n";this.vertexShader=this.context.createShader(this.context.VERTEX_SHADER),this.context.shaderSource(this.vertexShader,o),this.context.compileShader(this.vertexShader);var i="\nprecision highp float;\n#define GLSLIFY 1\n\nvarying vec2      outTex;\t// texture coords of row/column to calculate\nuniform sampler2D A;\t\t// texture with data from padded A\nuniform int       N;\t\t// number of columns in output\nuniform int       pad;\t\t//\n\n// Render float to bytes according to IEEE 754 Floating Point\nvec4 encode_float_1540259130(float val) {\n\n\t// TODO: correctly handle denormal numbers\n\t// http://www.2ality.com/2012/04/number-encoding.html\n\tfloat a = abs(val);                           // encode absolute value + sign\n\tfloat exp = floor(log2(a));                 // number of powers of 2\n\tfloat mant = pow(2.,log2(a)-exp) * pow(2.,23.);  // multiply to fill 24 bits (implied leading 1)\n\tfloat mant1 = floor(mant / 256. / 256.);    // first 8 bits of mantissa\n\tfloat mant2 = mod(floor(mant / 256.),256.); // second 8 bits\n\tfloat mant3 = mod(mant,256.);               // third 8 bits\n\n\thighp float sign = 128.-128.*(a/val);\t\t\t// sign bit is 256 or 0\n\thighp float e = (sign+exp+127.)/510.;\t\t// exponent and sign\n\thighp float m1 = (mant1-(128.*(1.-mod(exp+127.,2.))))/255.; // handle leading bit\n\thighp float m2 = (mant2)/255.;\t\t\t\t// middle part\n\thighp float m3 = (mant3+.5)/255.;\t\t\t// scale to 0 - 255\n\n\treturn vec4(m3,m2,m1,e);\n}\n\n// select an element from a vector based on index\nfloat select_index_1604150559(vec4 v, int index){\n\tfloat val;\n\tif (index == 0) {\n\t\tval = v.r;\n\t} else if(index == 1) {\n\t\tval = v.g;\n\t} else if(index == 2) {\n\t\tval = v.b;\n\t} else if(index == 3){\n\t\tval = v.a;\n\t} else {\n\t\t// should never be here\n\t\tval = 0.0;\n\t}\n\n\treturn val;\n}\n\nvoid main(void) {\n\n\t// get the implied row and column from .y and .x of passed (output)\n\t// texture coordinate. These map directly to input texture space when\n\t// the relevant dimensions are the same.\n\tfloat row_t = outTex.y;\n\tfloat col_t = outTex.x;\n\n\tvec4 val_v = texture2D(A, vec2(col_t * float(N)/float(N + pad), row_t));\n\tint channel = int(mod(col_t * float(N), 4.0 ));\n\tfloat val = select_index_1604150559(val_v, channel);\n\n\tif (val == 0.) {\n\t\tgl_FragColor = vec4(0.,0.,0.,0.);\n\t\treturn;\n\t}\n\n \t// output vec4 with bytes for an IEEE754 32-bit floating point number\n\tgl_FragColor = encode_float_1540259130(val);\n}\n",a="\nprecision highp float;\n#define GLSLIFY 1\n\nvarying vec2      outTex;\t// texture coords of row/column to calculate\nuniform sampler2D A;\t\t// texture with data from padded A\nuniform int       M;\t\t// number of rows in output\nuniform int       N;\t\t// number of columns in output\nuniform int       mpad;\t\t//\nuniform int       npad;\t\t//\n\n// select an element from a vector based on index\nfloat select_index_1540259130(vec4 v, int index){\n\tfloat val;\n\tif (index == 0) {\n\t\tval = v.r;\n\t} else if(index == 1) {\n\t\tval = v.g;\n\t} else if(index == 2) {\n\t\tval = v.b;\n\t} else if(index == 3){\n\t\tval = v.a;\n\t} else {\n\t\t// should never be here\n\t\tval = 0.0;\n\t}\n\n\treturn val;\n}\n\nvoid main(void) {\n\n\t// get the implied row and column from .y and .x of passed (output)\n\t// texture coordinate. These map directly to input texture space when\n\t// the relevant dimensions are the same.\n\tfloat row_t = outTex.y;\n\tfloat col_t = outTex.x;\n\tfloat col = (col_t * float(N + npad) - 2.0); // index of first element in pixel (matrix space)\n\n\t// get rows in the input, each containing one element in the output\n\tvec4 row_1 = texture2D(A, vec2((row_t * float(M))/float(M + mpad), (col + 0.5)/float(N)));\n\tvec4 row_2 = texture2D(A, vec2((row_t * float(M))/float(M + mpad), (col + 1.5)/float(N)));\n\tvec4 row_3 = texture2D(A, vec2((row_t * float(M))/float(M + mpad), (col + 2.5)/float(N)));\n\tvec4 row_4 = texture2D(A, vec2((row_t * float(M))/float(M + mpad), (col + 3.5)/float(N)));\n\n\t// package into output vector\n\tint channel = int(mod(row_t * float(M), 4.0 ));\n\n\tvec4 col_v = vec4(0.0, 0.0, 0.0, 0.0); // vec4 representing four elements in a column in the input\n\n\t// extract relevent element from each input row\n\tcol_v.r = select_index_1540259130(row_1, channel);\n\tif(npad > 0 && (col + 4.0) > float(N) ) {\n\t\t// compute elements in padded region\n\t\tif(npad < 3){\n\t\t\tcol_v.g = select_index_1540259130(row_2, channel);\n\t\t}\n\t\tif(npad < 2){\n\t\t\tcol_v.b = select_index_1540259130(row_3, channel);\n\t\t}\n\t} else {\n\t\tcol_v.g = select_index_1540259130(row_2, channel);\n\t\tcol_v.b = select_index_1540259130(row_3, channel);\n\t\tcol_v.a = select_index_1540259130(row_4, channel);\n\t}\n\n\tgl_FragColor = col_v;\n}\n",s="\nprecision highp float;\n#define GLSLIFY 1\n\nvarying vec2      outTex;\t// texture coords of row/column to calculate\nuniform sampler2D A;\t\t// texture with data from padded A\nuniform float     M;\t\t// number of rows in output\nuniform float     N;\t\t// number of columns in output\nuniform float     pad;\t\t// column padding in output\nuniform float     M_in;\t\t// number of rows in input\nuniform float     N_in;\t\t// number of columns in input\nuniform float     pad_in;\t// column padding in input\n\n/* number of input pixels\n   origin index (channel) for each\n   termination index (channel) for each\n   destination origin index (channel) for each\n */\n// select an element from a vector based on index\nfloat select_index_1540259130(vec4 v, int index){\n\tfloat val;\n\tif (index == 0) {\n\t\tval = v.r;\n\t} else if(index == 1) {\n\t\tval = v.g;\n\t} else if(index == 2) {\n\t\tval = v.b;\n\t} else if(index == 3){\n\t\tval = v.a;\n\t} else {\n\t\t// should never be here\n\t\tval = 0.0;\n\t}\n\n\treturn val;\n}\n\n// set pad values to 0.0, if in padded region of output texture\nvoid fix_pad_1604150559(inout vec4 v, int pad){\n\tv.a = 0.0;\n\tif(pad == 2){\n\t\tv.b = 0.0;\n\t} else if(pad == 3){\n\t\tv.b = 0.0;\n\t\tv.g = 0.0;\n\t}\n}\n\n// translate a linear index into x, y coordinates for a matrix\nvec2 linear_index_coords_1117569599(float linear_index, float row_length){\n\tvec2 coords;\n\n\tcoords.x = floor(mod(linear_index + 0.5, row_length)); // column\n\tcoords.y = floor((linear_index + 0.5) / row_length); // row\n\n\treturn coords;\n}\n\nvoid main(void) {\n\n\t// get the implied row and column from .y and .x of passed (output)\n\t// texture coordinate. These map directly to input texture space when\n\t// the relevant dimensions are the same.\n\tfloat row_t = outTex.y;\n\tfloat col_t = outTex.x;\n\n\tfloat row = floor(row_t * M);\n\tfloat col_0 = (col_t * (N + pad) - 2.0); // index of first element in pixel (matrix space)\n\t//float col_0 = floor(col_t * (N + pad)/4.0)*4.0; // index of first element in pixel (matrix space)\n\tfloat lin_index_0 = row * N + col_0; // linearized index of first element in pixel in output\n\n\tvec4 pixel_in = vec4(0.0, 0.0, 0.0, 0.0);\n\tvec4 result = vec4(0.0, 0.0, 0.0, 0.0);\n\tvec2 coords = linear_index_coords_1117569599(lin_index_0, N_in);\n\tvec2 ncoords;\n\tint channel_in = int(mod(coords.x, 4.0));\n\n\tvec2 scale_in = vec2(1.0/(N_in + pad_in), 1.0/M_in); // scale from matrix to input texture coords\n\tvec2 offset_in = vec2(0.5, 0.5); // move away from edge of pixel\n\tconst vec2 pixel_scale = vec2(1.0/4.0, 1.0); // scale from matrix to pixel coords\n\n\tpixel_in = texture2D(A, (coords + offset_in) * scale_in);\n\n\t// go through channels for current output pixel\n\tfor(int channel = 0; channel < 4; channel++){\n\n\t\t// are we on a new input pixel?\n\t\tncoords = linear_index_coords_1117569599(lin_index_0 + float(channel), N_in);\n\t\tif(floor(ncoords * pixel_scale) != floor(coords * pixel_scale)){\n\t\t\tcoords = ncoords;\n\t\t\tpixel_in = texture2D(A, (coords + offset_in) * scale_in);\n\t\t\tchannel_in = 0;\n\t\t}\n\n\t\tif(channel == 0){\n\t\t\tresult.r = select_index_1540259130(pixel_in, channel_in);\n\t\t} else if(channel == 1){\n\t\t\tresult.g = select_index_1540259130(pixel_in, channel_in);\n\t\t} else if(channel == 2){\n\t\t\tresult.b = select_index_1540259130(pixel_in, channel_in);\n\t\t} else {\n\t\t\tresult.a = select_index_1540259130(pixel_in, channel_in);\n\t\t}\n\n\t\tchannel_in++;\n\t}\n\n\t// are we in the padded (output) region?\n\tif(pad > 0.0 && col_0 + 3.5 > N ) {\n\t\tfix_pad_1604150559(result, int(pad));\n\t}\n\n\tgl_FragColor = result;\n}\n",u="\nprecision highp float;\n#define GLSLIFY 1\n\nvarying vec2      outTex;\t// texture coords of row/column to calculate\nuniform sampler2D A;\t\t// texture with data from padded A\nuniform float     M;\t\t// number of rows in output\nuniform float     N;\t\t// number of columns in output\nuniform float     M_in;\t\t// number of rows in input\nuniform float     N_in;\t\t// number of columns in input\n\n// translate a linear index into x, y coordinates for a matrix\nvec2 linear_index_coords_1540259130(float linear_index, float row_length){\n\tvec2 coords;\n\n\tcoords.x = floor(mod(linear_index + 0.5, row_length)); // column\n\tcoords.y = floor((linear_index + 0.5) / row_length); // row\n\n\treturn coords;\n}\n\nvoid main(void) {\n\n\t// get the implied row and column from .y and .x of passed (output)\n\t// texture coordinate. These map directly to input texture space when\n\t// the relevant dimensions are the same.\n\tfloat row_t = outTex.y;\n\tfloat col_t = outTex.x;\n\n\tfloat row = floor(row_t * M);\n\tfloat col_0 = floor(col_t * N - 1.5); // index of first element in pixel (matrix space)\n\tfloat lin_index_0 = row * N + col_0; // linearized index of first element in pixel in output\n\n\tvec4 result;\n\tvec2 coords = linear_index_coords_1540259130(lin_index_0, N_in);\n\n\tvec2 scale_in = vec2(1.0/N_in, 1.0/M_in); // scale from matrix to input texture coords\n\tvec2 offset_in = vec2(0.5, 0.5); // move away from edge of pixel\n\n\tresult = texture2D(A, (coords + offset_in) * scale_in);\n\n\tgl_FragColor = result;\n}\n",l="precision highp float;\n#define GLSLIFY 1\n\nvarying vec2      outTex;\t// texture coords of row/column to calculate\nuniform sampler2D X;\t\t// texture with data from padded X\nuniform float     N;\t\t// number of columns\nuniform float     pad;\t\t// additional columns to nearest multiple of four\nuniform float     N_in;\t\t// number of columns (input)\nuniform float     pad_in;\t// additional columns to nearest multiple of four (input)\nuniform float     stride;\nuniform float     offset;   // zero or one\n\n// set pad values to 0.0, if in padded region of output texture\nvoid fix_pad_1540259130(inout vec4 v, int pad){\n\tv.a = 0.0;\n\tif(pad == 2){\n\t\tv.b = 0.0;\n\t} else if(pad == 3){\n\t\tv.b = 0.0;\n\t\tv.g = 0.0;\n\t}\n}\n\n/* join parts of two pixels into one, selecting four continguous elements\n  starting at channel.\n*/\nvoid join_pixels_1604150559(inout vec4 x, vec4 x0, vec4 x1, float channel){\n\tif(channel == 1.0){\n\t\tx.rgb = x0.gba;\n\t\tx.a = x1.r;\n\t} else if(channel == 2.0){\n\t\tx.rg = x0.ba;\n\t\tx.ba = x1.rg;\n\t} else if(channel == 3.0){\n\t\tx.r = x0.a;\n\t\tx.gba = x1.rgb;\n\t}\n}\n\nvoid main(void) {\n\n\t// get the implied row and column from .y and .x of passed (output)\n\t// texture coordinate. These map directly to input texture space when\n\t// the relevant dimensions are the same.\n\tfloat row_t = outTex.y;\n\tfloat col_t = outTex.x;\n\tfloat col = floor(col_t * (N + pad) - 1.5); // index of first element in pixel (output matrix space)\n\n\tfloat stripe = floor(col / stride);\n\tfloat sub_col = floor(mod(col, stride));\n\n\tfloat col_in = (offset + (2.0 * stripe)) * stride + sub_col;\n\n\tvec4 x;\n\tfloat channel = mod(col_in, 4.0); // channel in the input of first element in output\n\n\t// are we at the beggining of an input pixel?\n\tif(channel == 0.0){\n\t\t// yes, select the whole thing\n\t\tx = texture2D( X, vec2((col_in + 2.0 - channel) / (N_in + pad_in) , row_t));\n\t} else {\n\t\t// no, select parts from two pixels\n\t\tvec4 x0, x1;\n\t\tx0 = texture2D( X, vec2((col_in + 2.0 - channel) / (N_in + pad_in) , row_t));\n\t\tx1 = texture2D( X, vec2((col_in + 6.0 - channel) / (N_in + pad_in) , row_t));\n\n\t\tjoin_pixels_1604150559(x, x0, x1, channel);\n\n\t}\n\n\t// fix padded region\n\tif(pad > 0.0 && col + 4.0 > N ) {\n\t\tfix_pad_1540259130(x, int(pad));\n\t}\n\n\tgl_FragColor = x;\n}\n",c="precision highp float;\n#define GLSLIFY 1\n\nvarying vec2      outTex;\t// texture coords of row/column to calculate\nuniform sampler2D A;\t\t// texture with data from padded A\nuniform sampler2D B;\t\t// texture with data from padded B\nuniform float     N_in;\t\t// number of columns\nuniform float     pad_in;\t// additional columns to nearest multiple of four\nuniform float     stride;\n\n// set pad values to 0.0, if in padded region of output texture\nvoid fix_pad_1540259130(inout vec4 v, int pad){\n\tv.a = 0.0;\n\tif(pad == 2){\n\t\tv.b = 0.0;\n\t} else if(pad == 3){\n\t\tv.b = 0.0;\n\t\tv.g = 0.0;\n\t}\n}\n\nvoid main(void) {\n\n\t// get the implied row and column from .y and .x of passed (output)\n\t// texture coordinate. These map directly to input texture space when\n\t// the relevant dimensions are the same.\n\tfloat row_t = outTex.y;\n\tfloat col_t = outTex.x;\n\tfloat N = N_in * 2.0;\n\tfloat pad = mod(N, 4.0);\n\tfloat col = floor(col_t * (N + pad) - 1.5); // index of first element in pixel (output matrix space)\n\n\tfloat stripe = floor(col / stride);\n\tfloat sub_col = floor(mod(col, stride));\n\n\tfloat tex_select = mod(stripe, 2.0);\n\tfloat col_in = floor(stripe / 2.0) * stride + sub_col;\n\n\tvec4 x;\n\tfloat channel = mod(col_in, 4.0); // channel in the input of first element in output\n\n\t// which input texture are we getting this pixel from?\n\tif(tex_select == 0.0){\n\t\tx = texture2D( A, vec2((col_in + 2.0) / (N_in + pad_in) , row_t));\n\t} else {\n\t\tx = texture2D( B, vec2((col_in + 2.0) / (N_in + pad_in) , row_t));\n\t}\n\n\t// fix padded region\n\tif(pad > 0.0 && col + 4.0 > N ) {\n\t\tfix_pad_1540259130(x, int(pad));\n\t}\n\n\tgl_FragColor = x;\n}\n";this.encode_program=this.createProgram(i),this.transpose_program=this.createProgram(a),this.reshape_program=this.createProgram(s),this.reshape_simple_program=this.createProgram(u),this.submatrix_program=this.createProgram(l),this.combine_program=this.createProgram(c)}e.exports=r,r.COMPONENTS_PER_TEXEL=4,r.POSITION_UNIFORM_NAME="pos",r.TEXTURE_UNIFORM_NAME="tex",r.prototype.encode=function(t,e,n,r){this.program=this.encode_program,this.selectProgram(this.program);var o=this.getPad(e),i=this.context.getUniformLocation(this.program,"N"),a=this.context.getUniformLocation(this.program,"pad");this.context.uniform1i(i,e),this.context.uniform1i(a,o),this.bindInputTexture(n,this.context.TEXTURE0,"A"),this.bindOutputTexture(t,e,r),this.context.drawElements(this.context.TRIANGLES,6,this.context.UNSIGNED_SHORT,0),this.unbindInputTexture(this.context.TEXTURE0)},r.prototype.transpose=function(t,e,n,r){this.program=this.transpose_program,this.selectProgram(this.program);var o=this.getPad(e),i=this.getPad(t),a=this.context.getUniformLocation(this.program,"N"),s=this.context.getUniformLocation(this.program,"npad"),u=this.context.getUniformLocation(this.program,"M"),l=this.context.getUniformLocation(this.program,"mpad");this.context.uniform1i(a,t),this.context.uniform1i(s,i),this.context.uniform1i(u,e),this.context.uniform1i(l,o),this.bindInputTexture(n,this.context.TEXTURE0,"A"),this.bindOutputTexture(e,(t+i)/4,r),this.context.drawElements(this.context.TRIANGLES,6,this.context.UNSIGNED_SHORT,0),this.unbindInputTexture(this.context.TEXTURE0)},r.prototype.reshape=function(t,e,n,r,o,i){var a=this.getPad(e),s=this.getPad(r);0==a&&0==s?this.program=this.reshape_simple_program:(this.program=this.reshape_program,console.log("# WARNING: using slow reshape shader.")),this.selectProgram(this.program);var u=this.context.getUniformLocation(this.program,"M"),l=this.context.getUniformLocation(this.program,"N"),c=this.context.getUniformLocation(this.program,"pad"),f=this.context.getUniformLocation(this.program,"M_in"),p=this.context.getUniformLocation(this.program,"N_in"),h=this.context.getUniformLocation(this.program,"pad_in");this.context.uniform1f(u,n),this.context.uniform1f(l,r),this.context.uniform1f(c,s),this.context.uniform1f(f,t),this.context.uniform1f(p,e),this.context.uniform1f(h,a),this.bindInputTexture(o,this.context.TEXTURE0,"A"),this.bindOutputTexture(n,(r+s)/4,i),this.context.drawElements(this.context.TRIANGLES,6,this.context.UNSIGNED_SHORT,0),this.unbindInputTexture(this.context.TEXTURE0)},r.prototype.submatrix=function(t,e,n,r,o,i,a){this.program=this.submatrix_program,this.selectProgram(this.program);var s=this.getPad(t),u=this.getPad(n),l=this.context.getUniformLocation(this.program,"N"),c=this.context.getUniformLocation(this.program,"pad"),f=this.context.getUniformLocation(this.program,"N_in"),p=this.context.getUniformLocation(this.program,"pad_in"),h=this.context.getUniformLocation(this.program,"offset");stride_gl=this.context.getUniformLocation(this.program,"stride"),this.context.uniform1f(l,n),this.context.uniform1f(c,u),this.context.uniform1f(f,t),this.context.uniform1f(p,s),this.context.uniform1f(stride_gl,r),this.context.uniform1f(h,o),this.bindInputTexture(i,this.context.TEXTURE0,"X"),this.bindOutputTexture(e,(n+u)/4,a),this.context.drawElements(this.context.TRIANGLES,6,this.context.UNSIGNED_SHORT,0),this.unbindInputTexture(this.context.TEXTURE0)},r.prototype.combine=function(t,e,n,r,o,i){this.program=this.combine_program,this.selectProgram(this.program);var a=2*e,s=this.getPad(e),u=this.getPad(a),l=this.context.getUniformLocation(this.program,"N_in"),c=this.context.getUniformLocation(this.program,"pad_in"),f=this.context.getUniformLocation(this.program,"stride");this.context.uniform1f(l,e),this.context.uniform1f(c,s),this.context.uniform1f(f,n),this.bindInputTexture(r,this.context.TEXTURE0,"A"),this.bindInputTexture(o,this.context.TEXTURE1,"B"),this.bindOutputTexture(t,(a+u)/4,i),this.context.drawElements(this.context.TRIANGLES,6,this.context.UNSIGNED_SHORT,0),this.unbindInputTexture(this.context.TEXTURE0)},r.prototype.bindInputTexture=function(t,e,n){var r=this.context,o=this.program;r.activeTexture(e),r.bindTexture(r.TEXTURE_2D,t);var i=r.getUniformLocation(o,n);r.uniform1i(i,e-r.TEXTURE0)},r.prototype.createProgram=function(t){var e,n=this.context;if(e=n.createShader(n.FRAGMENT_SHADER),n.shaderSource(e,t),n.compileShader(e),0==n.getShaderParameter(e,n.COMPILE_STATUS))throw new Error(n.getShaderInfoLog(e));var r=n.createProgram();return n.attachShader(r,this.vertexShader),n.attachShader(r,e),n.linkProgram(r),r},r.prototype.selectProgram=function(t){var e=this.context;e.useProgram(t),this.bindVertices(t)},r.prototype.bindVertices=function(t){var e=this.context,n=t,o=e.getAttribLocation(n,r.POSITION_UNIFORM_NAME),i=e.createBuffer();e.bindBuffer(e.ARRAY_BUFFER,i);var a=[-1,-1,0,1,-1,0,1,1,0,-1,1,0];e.bufferData(e.ARRAY_BUFFER,new Float32Array(a),e.STATIC_DRAW),e.vertexAttribPointer(o,3,e.FLOAT,!1,0,0),e.enableVertexAttribArray(o);var s=e.getAttribLocation(n,r.TEXTURE_UNIFORM_NAME),u=e.createBuffer();e.bindBuffer(e.ARRAY_BUFFER,u);var l=[0,0,1,0,1,1,0,1];e.bufferData(e.ARRAY_BUFFER,new Float32Array(l),e.STATIC_DRAW),e.vertexAttribPointer(s,2,e.FLOAT,!1,0,0),e.enableVertexAttribArray(s);var c=e.createBuffer();e.bindBuffer(e.ELEMENT_ARRAY_BUFFER,c);var f=[0,1,2,0,2,3];e.bufferData(e.ELEMENT_ARRAY_BUFFER,new Uint16Array(f),e.STATIC_DRAW)},r.prototype.createDataTexture=function(t,e,n){var o=this.context,i=[0,0,0,0],a=e%r.COMPONENTS_PER_TEXEL,s=0==a?0:r.COMPONENTS_PER_TEXEL-a,u=o.createTexture();if(o.bindTexture(o.TEXTURE_2D,u),0==s||null==n||"undefined"==typeof n)o.texImage2D(o.TEXTURE_2D,0,o.RGBA,(e+s)/r.COMPONENTS_PER_TEXEL,t,0,o.RGBA,o.FLOAT,n);else{o.texImage2D(o.TEXTURE_2D,0,o.RGBA,(e+s)/r.COMPONENTS_PER_TEXEL,t,0,o.RGBA,o.FLOAT,null);for(var l,c,f=e-a,p=f/r.COMPONENTS_PER_TEXEL,h=0,d=new Float32Array(i),v=0;t>v;v++)h=v*e,full_texel_row_end=h+f,l=new Float32Array(n.buffer,h*n.BYTES_PER_ELEMENT,f),f>0&&o.texSubImage2D(o.TEXTURE_2D,0,0,v,p,1,o.RGBA,o.FLOAT,l),c=new Float32Array(n.buffer,full_texel_row_end*n.BYTES_PER_ELEMENT,a),d.set(c),o.texSubImage2D(o.TEXTURE_2D,0,p,v,1,1,o.RGBA,o.FLOAT,d)}return o.texParameteri(o.TEXTURE_2D,o.TEXTURE_WRAP_S,o.CLAMP_TO_EDGE),o.texParameteri(o.TEXTURE_2D,o.TEXTURE_WRAP_T,o.CLAMP_TO_EDGE),o.texParameteri(o.TEXTURE_2D,o.TEXTURE_MAG_FILTER,o.NEAREST),o.texParameteri(o.TEXTURE_2D,o.TEXTURE_MIN_FILTER,o.NEAREST),o.bindTexture(o.TEXTURE_2D,null),u},r.prototype.createOutputTexture=function(t,e){var n=this.context,r=this.getPad(e),o=n.createTexture();return n.bindTexture(n.TEXTURE_2D,o),n.texImage2D(n.TEXTURE_2D,0,n.RGBA,e+r,t,0,n.RGBA,n.UNSIGNED_BYTE,null),n.texParameteri(n.TEXTURE_2D,n.TEXTURE_WRAP_S,n.CLAMP_TO_EDGE),n.texParameteri(n.TEXTURE_2D,n.TEXTURE_WRAP_T,n.CLAMP_TO_EDGE),n.texParameteri(n.TEXTURE_2D,n.TEXTURE_MAG_FILTER,n.NEAREST),n.texParameteri(n.TEXTURE_2D,n.TEXTURE_MIN_FILTER,n.NEAREST),n.bindTexture(n.TEXTURE_2D,null),o},r.prototype.bindOutputTexture=function(t,e,n){var r=this.context;if(this.canvas.height=t,this.canvas.width=e,r.viewport(0,0,e,t),this.framebuffer=this.framebuffer||r.createFramebuffer(),r.bindFramebuffer(r.FRAMEBUFFER,this.framebuffer),r.framebufferTexture2D(r.FRAMEBUFFER,r.COLOR_ATTACHMENT0,r.TEXTURE_2D,n,0),r.checkFramebufferStatus(r.FRAMEBUFFER)!=r.FRAMEBUFFER_COMPLETE)throw new Error("Bound framebuffer is not complete.");return this.framebuffer},r.prototype.unbindInputTexture=function(t){var e=this.context;e.activeTexture(t),e.bindTexture(e.TEXTURE_2D,null)},r.prototype.readData=function(t,e){var n=this.context;return rawbuffer=new ArrayBuffer(t*e*Float32Array.BYTES_PER_ELEMENT),prod=new Uint8Array(rawbuffer),n.readPixels(0,0,e,t,n.RGBA,n.UNSIGNED_BYTE,prod),rawbuffer},r.prototype.getPad=function(t){var e=t%r.COMPONENTS_PER_TEXEL,n=0==e?0:r.COMPONENTS_PER_TEXEL-e;return n}},{}]},{},[1])(1)})},function(t,e,n){t.exports=n(206)},function(t,e,n){"use strict";function r(t){var e=new a(t),n=i(a.prototype.request,e);return 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Error(n.name+" [Deconvolution2D layer] Invalid borderMode.");if(n.borderMode=_,n.subsample=y,"tf"!==w&&"th"!==w)throw new Error(n.name+" [Deconvolution2D layer] Only tf and th dim ordering are allowed.");return n.dimOrdering=w,n.bias=E,n.params=n.bias?["W","b"]:["W"],n.gpu&&weblas&&(n._useWeblas=!0,n._pipelineEnabled=!1),n}return s(e,t),l(e,[{key:"setWeights",value:function(t){"th"===this.dimOrdering&&(t[0].tensor=t[0].tensor.transpose(2,3,1,0)),c(e.prototype.__proto__||Object.getPrototypeOf(e.prototype),"setWeights",this).call(this,t),this._wRowsMat=this._w2row(),this._useWeblas&&(this._wRowsMat.createWeblasTensor(),this._wRowsMat._gpuMaxSizeExceeded||(this._wRowsMat.weblasTensor=this._wRowsMat.weblasTensor.transpose()))}},{key:"_calcOutputPadding",value:function(t){var e=t.tensor.shape[0],n=t.tensor.shape[1],r=this.kernelShape[1],o=this.kernelShape[2],i=this.outputShape[0],a=this.outputShape[1],s="same"===this.borderMode?Math.max(0,Math.floor((e-1)*this.subsample[0]+r-i)):0,u="same"===this.borderMode?Math.max(0,Math.floor((n-1)*this.subsample[1]+o-a)):0,l=Math.floor(s/2),c=s-l,f=Math.floor(u/2),p=u-f;this.outputPadding=[l,c,f,p]}},{key:"_im2col",value:function(t){for(var e=u(t.tensor.shape,3),n=e[0],r=e[1],o=e[2],i=new d.default([],[n*r,o]),a=new d.default([],[n*r]),s=new d.default([],[n,r]),l=0;l<o;l++)g.default.assign(s.tensor,t.tensor.pick(null,null,l)),a.replaceTensorData(s.tensor.data),g.default.assign(i.tensor.pick(null,l),a.tensor);return i}},{key:"_w2row",value:function(){for(var t=u(this.weights.W.tensor.shape,4),e=t[0],n=t[1],r=t[2],o=t[3],i=new d.default([],[r,e*n*o]),a=new d.default([],[e*n*o]),s=new 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e.default=t,e}function i(t,e){if(!(t instanceof e))throw new TypeError("Cannot call a class as a function")}function a(t,e){if(!t)throw new ReferenceError("this hasn't been initialised - super() hasn't been called");return!e||"object"!=typeof e&&"function"!=typeof e?t:e}function s(t,e){if("function"!=typeof e&&null!==e)throw new TypeError("Super expression must either be null or a function, not "+typeof e);t.prototype=Object.create(e&&e.prototype,{constructor:{value:t,enumerable:!1,writable:!0,configurable:!0}}),e&&(Object.setPrototypeOf?Object.setPrototypeOf(t,e):t.__proto__=e)}Object.defineProperty(e,"__esModule",{value:!0});var u=function(){function t(t,e){var n=[],r=!0,o=!1,i=void 0;try{for(var a,s=t[Symbol.iterator]();!(r=(a=s.next()).done)&&(n.push(a.value),!e||n.length!==e);r=!0);}catch(t){o=!0,i=t}finally{try{!r&&s.return&&s.return()}finally{if(o)throw i}}return n}return function(e,n){if(Array.isArray(e))return e;if(Symbol.iterator in Object(e))return t(e,n);throw new 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w=function(){},x={},E={},T=t("./thenables")(i,w),O=t("./promise_array")(i,w,T,p,r),S=t("./context")(i),P=S.create,M=t("./debuggability")(i,S),j=(M.CapturedTrace,t("./finally")(i,T)),A=t("./catch_filter")(E),C=t("./nodeback"),R=d.errorObj,k=d.tryCatch;return i.prototype.toString=function(){return"[object Promise]"},i.prototype.caught=i.prototype.catch=function(t){var e=arguments.length;if(e>1){var n,r=new Array(e-1),o=0;for(n=0;n<e-1;++n){var i=arguments[n];if(!d.isObject(i))return p("expecting an object but got A catch statement predicate "+d.classString(i));r[o++]=i}return r.length=o,t=arguments[n],this.then(void 0,A(r,t,this))}return this.then(void 0,t)},i.prototype.reflect=function(){return this._then(f,f,void 0,this,void 0)},i.prototype.then=function(t,e){if(M.warnings()&&arguments.length>0&&"function"!=typeof t&&"function"!=typeof e){var n=".then() only accepts functions but was passed: "+d.classString(t);arguments.length>1&&(n+=", "+d.classString(e)),this._warn(n)}return 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r===R&&e._rejectCallback(r.e,!0),e._isFateSealed()||e._setAsyncGuaranteed(),e},i.all=function(t){return new O(t).promise()},i.cast=function(t){var e=T(t);return e instanceof i||(e=new i(w),e._captureStackTrace(),e._setFulfilled(),e._rejectionHandler0=t),e},i.resolve=i.fulfilled=i.cast,i.reject=i.rejected=function(t){var e=new i(w);return e._captureStackTrace(),e._rejectCallback(t,!0),e},i.setScheduler=function(t){if("function"!=typeof t)throw new y("expecting a function but got "+d.classString(t));return _.setScheduler(t)},i.prototype._then=function(t,e,n,r,o){var a=void 0!==o,s=a?o:new i(w),u=this._target(),c=u._bitField;a||(s._propagateFrom(this,3),s._captureStackTrace(),void 0===r&&0!==(2097152&this._bitField)&&(r=0!==(50397184&c)?this._boundValue():u===this?void 0:this._boundTo),this._fireEvent("promiseChained",this,s));var f=l();if(0!==(50397184&c)){var p,h,v=u._settlePromiseCtx;0!==(33554432&c)?(h=u._rejectionHandler0,p=t):0!==(16777216&c)?(h=u._fulfillmentHandler0,p=e,u._unsetRejectionIsUnhandled()):(v=u._settlePromiseLateCancellationObserver,h=new b("late cancellation observer"),u._attachExtraTrace(h),p=e),_.invoke(v,u,{handler:null===f?p:"function"==typeof p&&d.domainBind(f,p),promise:s,receiver:r,value:h})}else u._addCallbacks(t,e,s,r,f);return s},i.prototype._length=function(){return 65535&this._bitField},i.prototype._isFateSealed=function(){return 0!==(117506048&this._bitField)},i.prototype._isFollowing=function(){return 67108864===(67108864&this._bitField)},i.prototype._setLength=function(t){this._bitField=this._bitField&-65536|65535&t},i.prototype._setFulfilled=function(){this._bitField=33554432|this._bitField,this._fireEvent("promiseFulfilled",this)},i.prototype._setRejected=function(){this._bitField=16777216|this._bitField,this._fireEvent("promiseRejected",this)},i.prototype._setFollowing=function(){this._bitField=67108864|this._bitField,this._fireEvent("promiseResolved",this)},i.prototype._setIsFinal=function(){this._bitField=4194304|this._bitField},i.prototype._isFinal=function(){return(4194304&this._bitField)>0},i.prototype._unsetCancelled=function(){this._bitField=this._bitField&-65537},i.prototype._setCancelled=function(){this._bitField=65536|this._bitField,this._fireEvent("promiseCancelled",this)},i.prototype._setWillBeCancelled=function(){this._bitField=8388608|this._bitField},i.prototype._setAsyncGuaranteed=function(){_.hasCustomScheduler()||(this._bitField=134217728|this._bitField)},i.prototype._receiverAt=function(t){var e=0===t?this._receiver0:this[4*t-4+3];if(e!==h)return void 0===e&&this._isBound()?this._boundValue():e},i.prototype._promiseAt=function(t){return this[4*t-4+2]},i.prototype._fulfillmentHandlerAt=function(t){return this[4*t-4+0]},i.prototype._rejectionHandlerAt=function(t){return this[4*t-4+1]},i.prototype._boundValue=function(){},i.prototype._migrateCallback0=function(t){var e=(t._bitField,t._fulfillmentHandler0),n=t._rejectionHandler0,r=t._promise0,o=t._receiverAt(0);void 0===o&&(o=h),this._addCallbacks(e,n,r,o,null)},i.prototype._migrateCallbackAt=function(t,e){var n=t._fulfillmentHandlerAt(e),r=t._rejectionHandlerAt(e),o=t._promiseAt(e),i=t._receiverAt(e);void 0===i&&(i=h),this._addCallbacks(n,r,o,i,null)},i.prototype._addCallbacks=function(t,e,n,r,o){var i=this._length();if(i>=65531&&(i=0,this._setLength(0)),0===i)this._promise0=n,this._receiver0=r,"function"==typeof t&&(this._fulfillmentHandler0=null===o?t:d.domainBind(o,t)),"function"==typeof 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this._attachExtraTrace(n),this._reject(n)}this._setFulfilled(),this._rejectionHandler0=t,(65535&e)>0&&(0!==(134217728&e)?this._settlePromises():_.settlePromises(this))}},i.prototype._reject=function(t){var e=this._bitField;if(!((117506048&e)>>>16))return this._setRejected(),this._fulfillmentHandler0=t,this._isFinal()?_.fatalError(t,d.isNode):void((65535&e)>0?_.settlePromises(this):this._ensurePossibleRejectionHandled())},i.prototype._fulfillPromises=function(t,e){for(var n=1;n<t;n++){var r=this._fulfillmentHandlerAt(n),o=this._promiseAt(n),i=this._receiverAt(n);this._clearCallbackDataAtIndex(n),this._settlePromise(o,r,i,e)}},i.prototype._rejectPromises=function(t,e){for(var n=1;n<t;n++){var r=this._rejectionHandlerAt(n),o=this._promiseAt(n),i=this._receiverAt(n);this._clearCallbackDataAtIndex(n),this._settlePromise(o,r,i,e)}},i.prototype._settlePromises=function(){var t=this._bitField,e=65535&t;if(e>0){if(0!==(16842752&t)){var 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diff --git a/mnist_06_110_decoder.json b/mnist_06_110_decoder.json
 {"class_name": "Model", "keras_version": "1.1.0", "config": {"layers": [{"class_name": "InputLayer", "config": {"batch_input_shape": [null, 8], "input_dtype": "float32", "sparse": false, "name": "input_1"}, "inbound_nodes": [], "name": "input_1"}, {"class_name": "Dense", "config": {"W_constraint": null, "b_constraint": null, "name": "dense_2", "activity_regularizer": null, "trainable": true, "init": "glorot_uniform", "bias": true, "input_dim": null, "b_regularizer": null, "W_regularizer": null, "activation": "relu", "output_dim": 128}, "inbound_nodes": [[["input_1", 0, 0]]], "name": "dense_2"}, {"class_name": "Dense", "config": {"W_constraint": null, "b_constraint": null, "name": "dense_3", "activity_regularizer": null, "trainable": true, "init": "glorot_uniform", "bias": true, "input_dim": null, "b_regularizer": null, "W_regularizer": null, "activation": "relu", "output_dim": 12544}, "inbound_nodes": [[["dense_2", 0, 0]]], "name": "dense_3"}, {"class_name": "Reshape", "config": {"target_shape": [14, 14, 64], "trainable": true, "name": "reshape_1"}, "inbound_nodes": [[["dense_3", 0, 0]]], "name": "reshape_1"}, {"class_name": "Deconvolution2D", "config": {"W_constraint": null, "b_constraint": null, "name": "deconvolution2d_1", "activity_regularizer": null, "trainable": true, "dim_ordering": "tf", "nb_col": 3, "subsample": [1, 1], "init": "glorot_uniform", "bias": true, "nb_filter": 64, "activation": "relu", "b_regularizer": null, "W_regularizer": null, "nb_row": 3, "output_shape": [null, 14, 14, 64], "border_mode": "same"}, "inbound_nodes": [[["reshape_1", 0, 0]]], "name": "deconvolution2d_1"}, {"class_name": "Deconvolution2D", "config": {"W_constraint": null, "b_constraint": null, "name": "deconvolution2d_2", "activity_regularizer": null, "trainable": true, "dim_ordering": "tf", "nb_col": 3, "subsample": [1, 1], "init": "glorot_uniform", "bias": true, "nb_filter": 64, "activation": "relu", "b_regularizer": null, "W_regularizer": null, "nb_row": 3, "output_shape": [null, 14, 14, 64], "border_mode": "same"}, "inbound_nodes": [[["deconvolution2d_1", 0, 0]]], "name": "deconvolution2d_2"}, {"class_name": "Deconvolution2D", "config": {"W_constraint": null, "b_constraint": null, "name": "deconvolution2d_3", "activity_regularizer": null, "trainable": true, "dim_ordering": "tf", "nb_col": 2, "subsample": [2, 2], "init": "glorot_uniform", "bias": true, "nb_filter": 64, "activation": "relu", "b_regularizer": null, "W_regularizer": null, "nb_row": 2, "output_shape": [null, 28, 28, 64], "border_mode": "valid"}, "inbound_nodes": [[["deconvolution2d_2", 0, 0]]], "name": "deconvolution2d_3"}, {"class_name": "Convolution2D", "config": {"W_constraint": null, "b_constraint": null, "name": "convolution2d_5", "activity_regularizer": null, "trainable": true, "dim_ordering": "tf", "nb_col": 2, "subsample": [1, 1], "init": "glorot_uniform", "bias": true, "nb_filter": 1, "border_mode": "valid", "b_regularizer": null, "W_regularizer": null, "activation": "sigmoid", "nb_row": 2}, "inbound_nodes": [[["deconvolution2d_3", 0, 0]]], "name": "convolution2d_5"}], "input_layers": [["input_1", 0, 0]], "output_layers": [["convolution2d_5", 0, 0]], "name": "decoder"}}
diff --git a/mnist_06_decoder_weights_metadata.json b/mnist_06_decoder_weights_metadata.json
 [{"weight_name": "dense_2_W:0", "length": 1024, "shape": [8, 128], "layer_name": "dense_2", "offset": 0, "type": "float32"}, {"weight_name": "dense_2_b:0", "length": 128, "shape": [128], "layer_name": "dense_2", "offset": 4096, "type": "float32"}, {"weight_name": "dense_3_W:0", "length": 1605632, "shape": [128, 12544], "layer_name": "dense_3", "offset": 4608, "type": "float32"}, {"weight_name": "dense_3_b:0", "length": 12544, "shape": [12544], "layer_name": "dense_3", "offset": 6427136, "type": "float32"}, {"weight_name": "deconvolution2d_1_W:0", "length": 36864, "shape": [3, 3, 64, 64], "layer_name": "deconvolution2d_1", "offset": 6477312, "type": "float32"}, {"weight_name": "deconvolution2d_1_b:0", "length": 64, "shape": [64], "layer_name": "deconvolution2d_1", "offset": 6624768, "type": "float32"}, {"weight_name": "deconvolution2d_2_W:0", "length": 36864, "shape": [3, 3, 64, 64], "layer_name": "deconvolution2d_2", "offset": 6625024, "type": "float32"}, {"weight_name": "deconvolution2d_2_b:0", "length": 64, "shape": [64], "layer_name": "deconvolution2d_2", "offset": 6772480, "type": "float32"}, {"weight_name": "deconvolution2d_3_W:0", "length": 16384, "shape": [2, 2, 64, 64], "layer_name": "deconvolution2d_3", "offset": 6772736, "type": "float32"}, {"weight_name": "deconvolution2d_3_b:0", "length": 64, "shape": [64], "layer_name": "deconvolution2d_3", "offset": 6838272, "type": "float32"}, {"weight_name": "convolution2d_5_W:0", "length": 256, "shape": [2, 2, 64, 1], "layer_name": "convolution2d_5", "offset": 6838528, "type": "float32"}, {"weight_name": "convolution2d_5_b:0", "length": 1, "shape": [1], "layer_name": "convolution2d_5", "offset": 6839552, "type": "float32"}]
diff --git a/mnist_06_decoder_weights_weights.buf b/mnist_06_decoder_weights_weights.buf
diff --git a/preview.jpg b/preview.jpg
diff --git a/sketch.js b/sketch.js
diff --git a/thumbnail.png b/thumbnail.png
	// note: this file is poorly named - it can generally be ignored.

	// helper functions below for supporting blocks/purview

	function saveBlocksImages(doZoom) {
	if(doZoom == null) {
	doZoom = false;
	}

	// generate 960x500 preview.jpg of entire canvas
	// TODO: should this be recycled?
	var offscreenCanvas = document.createElement('canvas');
	offscreenCanvas.width = 960;
	offscreenCanvas.height = 500;
	var context = offscreenCanvas.getContext('2d');
	// background is flat white
	context.fillStyle="#FFFFFF";
	context.fillRect(0, 0, 960, 500);
	context.drawImage(this.canvas, 0, 0, 960, 500);
	// save to browser
	var downloadMime = 'image/octet-stream';
	var imageData = offscreenCanvas.toDataURL('image/jpeg');
	imageData = imageData.replace('image/jpeg', downloadMime);
	p5.prototype.downloadFile(imageData, 'preview.jpg', 'jpg');

	// generate 230x120 thumbnail.png centered on mouse
	offscreenCanvas.width = 230;
	offscreenCanvas.height = 120;

	// background is flat white
	context = offscreenCanvas.getContext('2d');
	context.fillStyle="#FFFFFF";
	context.fillRect(0, 0, 230, 120);

	if(doZoom) {
	// pixelDensity does the right thing on retina displays
	var pd = this._pixelDensity;
	var sx = pd * mouseX - pd * 230/2;
	var sy = pd * mouseY - pd * 120/2;
	var sw = pd * 230;
	var sh = pd * 120;
	// bounds checking - just displace if necessary
	if (sx < 0) {
	sx = 0;
	}
	if (sx > this.canvas.width - sw) {
	sx = this.canvas.width - sw;
	}
	if (sy < 0) {
	sy = 0;
	}
	if (sy > this.canvas.height - sh) {
	sy = this.canvas.height - sh;
	}
	// save to browser
	context.drawImage(this.canvas, sx, sy, sw, sh, 0, 0, 230, 120);
	}
	else {
	// now scaledown
	var full_width = this.canvas.width;
	var full_height = this.canvas.height;
	context.drawImage(this.canvas, 0, 0, full_width, full_height, 0, 0, 230, 120);
	}
	imageData = offscreenCanvas.toDataURL('image/png');
	imageData = imageData.replace('image/png', downloadMime);
	p5.prototype.downloadFile(imageData, 'thumbnail.png', 'png');
	}
	/*
	* us p5.js to draw a clock on a 960x500 canvas
	*/

	// in browser, URLs can be relative or absolute
	const model = new KerasJS.Model({
	filepaths: {
	model: 'mnist_06_110_decoder.json',
	weights: 'mnist_06_decoder_weights_weights.buf',
	metadata: 'mnist_06_decoder_weights_metadata.json'
	},
	gpu: true
	})

	var concept_vecs = [
	[-0.097372, 0.598627, -0.427888, -0.388575, -0.447317, 0.543890, -0.420167, -0.526876],
	[ 0.482085, -0.421570, 0.156896, 0.101969, 0.710080, -0.315153, 0.189396, -0.628475],
	[ 0.199009, 0.302628, -0.304984, 0.743103, -0.321666, -0.196440, 0.837206, -0.164660],
	[ 0.702927, 0.061100, 0.391677, 0.078674, -0.263728, 0.399588, -0.117211, 0.555933],
	[-0.887413, 0.153023, 0.637169, -0.192469, 0.257092, -0.610011, 0.369441, 0.231632],
	[ 0.216774, -0.898855, 0.178582, -0.546435, -0.145294, 0.506996, 0.026063, 0.054160],
	[ 0.154096, 0.222272, 0.355234, -0.828151, -0.295889, -0.548858, 0.320933, -0.284068],
	[-0.004918, -0.491446, 0.105555, 0.905816, -0.065926, 0.348899, -0.759633, -0.242949],
	[-0.026785, 0.249264, -0.292006, -0.133150, 0.454588, 0.370761, 0.128081, 0.253320],
	[-0.478251, 0.057617, -0.203836, -0.186867, 0.461135, 0.025850, -0.784070, -0.052860]
	];

	var curAnchor = [0.1, 0.1, 0.1, 0.1, 0.1, 0.1, 0.1, 0.1];
	var curDAnchor = [0.6, 0.6, 0.6, 0.6, 0.6, 0.6, 0.6, 0.6];

	var curModelImages = [null, null, null, null, null, null];
	var curConceptVecs = [null, null, null, null, null, null];
	var digitPositions = [null, null, null, null, null, null];

	var MODEL_LOADING = 0;
	var MODEL_READY = 1;
	var MODEL_LOAD_ERROR = 2;
	var MODEL_WORKING = 3;
	var modelStatus = MODEL_LOADING;

	function local_setup() {
	model.ready()
	.then(() => {
	print("Model says it is ready")
	modelStatus = MODEL_READY;
	// redraw();
	})
	.catch(err => {
	// handle error
	print("Model says LOAD_ERROR")
	modelStatus = MODEL_LOAD_ERROR;
	// redraw();
	})

	for(var i=0; i<6; i++) {
	curModelImages[i] = createImage(56, 56);
	}
	for(var i=0; i<8; i++) {
	curDAnchor[i] = random(0.01, 0.05);
	}

	var s = 24;
	var hour_pos = [80, height/2 - 2 * s];
	digitPositions[0] = [hour_pos[0] + 0.0 * 5 * s, hour_pos[1]];
	digitPositions[1] = [hour_pos[0] + 1.0 * 5 * s, hour_pos[1]];
	digitPositions[2] = [hour_pos[0] + 2.5 * 5 * s, hour_pos[1]];
	digitPositions[3] = [hour_pos[0] + 3.5 * 5 * s, hour_pos[1]];
	digitPositions[4] = [hour_pos[0] + 5.0 * 5 * s, hour_pos[1]];
	digitPositions[5] = [hour_pos[0] + 6.0 * 5 * s, hour_pos[1]];
	}

	function move_anchor() {
	for(var i=0; i<8; i++) {
	var next = curAnchor[i] + curDAnchor[i];
	if(next > 0.5) {
	curDAnchor[i] = random(-0.01, -0.03);
	next = curAnchor[i] + curDAnchor[i];
	}
	else if(next < -0.5) {
	curDAnchor[i] = random(0.01, 0.03);
	next = curAnchor[i] + curDAnchor[i];
	}
	curAnchor[i] = next;
	}
	// print(curAnchor);
	}

	function digits_from_num(num) {
	digits = []
	if (num < 10) {
	digits.push(0);
	}
	else {
	n1 = Math.floor(num / 10);
	digits.push(n1);
	}
	n2 = Math.floor(num % 10);
	digits.push(n2);
	return digits;
	}

	function interp_vec(frac, v1, v2) {
	var v = new Array(8);
	for(var i=0; i<8; i++) {
	v[i] = lerp(v1[i], v2[i], frac)
	}
	return v;
	}

	function add_vec(v1, v2) {
	var v = new Array(8);
	for(var i=0; i<8; i++) {
	v[i] = v1[i] + v2[i];
	}
	return v;
	}

	// numbers waiting to be drawn
	var pendingOutput = [null, null, null, null, null, null];
	var digit_in_flight = false;

	function firePrediction() {
	var predict_map = [];
	for(var i=0; i<6; i++) {
	predict_map.push({ input_1: curConceptVecs[i] })
	}
	modelStatus = MODEL_WORKING;
	Promise.mapSeries(curConceptVecs, arr => model.predict({ input_1: arr }))
	.then(outputs => {
	for(var i=0; i<6; i++) {
	pendingOutput[i] = outputs[i]['convolution2d_5']
	}
	modelStatus = MODEL_READY;
	})

	// const inputData = { input_1: new Float32Array(v_sum) };
	// model.predict(inputData).then(outputData => {
	// pendingOutput[ix] = outputData['convolution2d_5'];
	// digit_in_flight[ix] = false;
	// });
	}

	function get_cur_concept_vec(frac, num1, num2) {
	var v1 = concept_vecs[num1];
	var v2 = concept_vecs[num2];
	var v_interp = interp_vec(frac, v1, v2);
	var v_sum = add_vec(curAnchor, v_interp);
	return new Float32Array(v_sum);
	}

	var first_time = true;

	function draw_clock(hour, minute, second, millis, alarm) {
	if(first_time) {
	local_setup();
	first_time = false;
	background(0);
	}

	move_anchor();

	// is alarm going off?
	/*
	if (alarm == 0) {
	if (second % 2 == 0) {
	background(0,0,100);
	}
	else {
	background(100,100,0);
	}
	}
	else {
	background(0);
	}
	*/
	// background(0);
	blendMode(BLEND);
	fill(0, 0, 0, 96);
	rect(0, height/3, width, 2*height/3);
	blendMode(ADD);

	// draw what digits we have
	var one_was_pending = false;
	for(var d=0;d<6;d++) {
	if(pendingOutput[d] != null) {
	one_was_pending = true;
	var curOutput = pendingOutput[d];
	pendingOutput[d] = null;

	curModelImages[d].loadPixels();
	for (var i = 0; i < 27; i++) {
	for (var j = 0; j < 27; j++) {
	var val = (255 * curOutput[j*27 + i]);
	if(val == null \|\| curModelImages[d] == null) {
	print("Found error at " + d + ":" + val +"," + curModelImages[d]);
	}
	else {
	// print(val);
	var c = color(val);
	curModelImages[d].set(i2, j2, c);
	curModelImages[d].set(i2+1, j2, c);
	curModelImages[d].set(i2, j2+1, c);
	curModelImages[d].set(i2+1, j2+1, c);
	}
	}
	}
	curModelImages[d].updatePixels();
	}
	if(curModelImages[d] != null) {
	image(curModelImages[d], digitPositions[d][0], digitPositions[d][1]);
	}
	}
	if(digit_in_flight && modelStatus == MODEL_READY && !one_was_pending) {
	digit_in_flight = false;
	}

	// see if we should compute a new set of digits
	if(modelStatus == MODEL_READY && digit_in_flight == false) {
	digit_in_flight = true;
	var precise_s = second + millis / 1000.0;
	print(hour, minute, precise_s);

	// HOURS
	next_hour = (hour + 1) % 24;
	digits1 = digits_from_num(hour);
	digits2 = digits_from_num(next_hour);
	if(second >= 50 && minute == 59 &&
	(hour == 9 \|\| hour == 19 \|\| hour == 23)) {
	// minute_fraction_tens = millis / 1000.0;
	seconds_left = (second - 50) + millis / 1000.0;
	hour_fraction_tens = seconds_left / 10.0;
	}
	else {
	hour_fraction_tens = 0;
	}
	curConceptVecs[0] = get_cur_concept_vec(hour_fraction_tens, digits1[0], digits2[0]);

	if(second >= 55 && minute == 59) {
	// minute_fraction_tens = millis / 1000.0;
	seconds_left = (second - 55) + millis / 1000.0;
	hour_fraction_ones = seconds_left / 5.0;
	}
	else {
	hour_fraction_ones = 0;
	}
	curConceptVecs[1] = get_cur_concept_vec(hour_fraction_ones, digits1[1], digits2[1]);

	// MINUTES
	next_minute = (minute + 1) % 60;
	digits1 = digits_from_num(minute);
	digits2 = digits_from_num(next_minute);
	if(second >= 58 && digits1[1] === 9) {
	// minute_fraction_tens = millis / 1000.0;
	seconds_left = (second - 58) + millis / 1000.0;
	minute_fraction_tens = seconds_left / 2.0;
	}
	else {
	minute_fraction_tens = 0;
	}
	curConceptVecs[2] = get_cur_concept_vec(minute_fraction_tens, digits1[0], digits2[0]);


	if(second === 59) {
	minute_fraction_ones = millis / 1000.0;
	}
	else {
	minute_fraction_ones = 0;
	}
	curConceptVecs[3] = get_cur_concept_vec(minute_fraction_ones, digits1[1], digits2[1]);

	// SECONDS
	next_second = (second + 1) % 60;
	second_fraction = millis / 1000.0;
	digits1 = digits_from_num(second);
	digits2 = digits_from_num(next_second);


	if(digits1[1] === 9 && millis > 500) {
	second_fraction_tens = (millis - 500) / 500.0;
	}
	else {
	second_fraction_tens = 0;
	}
	// draw the 10 second position
	curConceptVecs[4] = get_cur_concept_vec(second_fraction_tens, digits1[0], digits2[0]);

	if(millis > 750) {
	second_fraction_ones = (millis-750) / 250.0;
	}
	else {
	second_fraction_ones = 0;
	}
	// draw the 1 second position
	curConceptVecs[5] = get_cur_concept_vec(second_fraction_ones, digits1[1], digits2[1]);
	firePrediction();
	}
	}
	<head>
	<meta charset="utf-8">
	<script src="http://cdnjs.cloudflare.com/ajax/libs/p5.js/0.5.8/p5.js"></script>
	<script src="http://cdnjs.cloudflare.com/ajax/libs/p5.js/0.5.8/addons/p5.dom.js"></script>
	<script language="javascript" type="text/javascript" src=".purview_helper.js"></script>
	<script src="keras.js"></script>
	<script src="https://cdn.jsdelivr.net/bluebird/latest/bluebird.min.js"></script>
	<script language="javascript" type="text/javascript" src="debug.js"></script>
	<script language="javascript" type="text/javascript" src="clock.js"></script>
	<script language="javascript" type="text/javascript" src="sketch.js"></script>
	</head>
	<body style="background-color:white">
	<div class="outer">
	<div class="inner">
	<div id="canvasContainer"></div>
	</div>
	<div class="inner" id="controls">
	<table>
	<tr>
	<td>debug</td>
	<td id="checkboxDebug"></td>
	</tr>
	<tr>
	<td>hours</td>
	<td id="sliderHours"></td>
	<td>minutes</td>
	<td id="sliderMinutes"></td>
	<td>seconds</td>
	<td id="sliderSeconds"></td>
	<td>millis</td>
	<td id="sliderMillis"></td>
	</tr>
	<tr>
	<td>alarm</td>
	<td id="checkboxAlarm"></td>
	<td>alarm_secs</td>
	<td id="sliderAlarm"></td>
	</tr>
	</table>
	</div>
	</div>
	</table>
	</body>
	var DEBUG=true;

	var debugCheckbox;
	var hourSlider;
	var minSlider;
	var secSlider;
	var millisSlider;
	var alarmSlider;

	function debug_setup() {
	debugCheckbox = createCheckbox('', false);
	debugCheckbox.parent("checkboxDebug")
	hourSlider = createSlider(0, 23, 12);
	hourSlider.parent("sliderHours")
	minSlider = createSlider(0, 59, 0);
	minSlider.parent("sliderMinutes")
	secSlider = createSlider(0, 59, 0);
	secSlider.parent("sliderSeconds")
	millisSlider = createSlider(0, 999, 0);
	millisSlider.parent("sliderMillis")
	alarmCheckbox = createCheckbox('', false);
	alarmCheckbox.parent("checkboxAlarm")
	alarmSlider = createSlider(0, 60, 0);
	alarmSlider.parent("sliderAlarm")
	}