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rainbow.html
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<!DOCTYPE html>
<html>
<head>
<style>
body {
background-color: #888;
font-family: sans-serif;
}
.color {
height: 32px;
width: 32px;
display: inline-block;
background-color: #ccc;
}
.color.selected {
transform: scale(1.2, 1.2);
}
.container {
display: inline-block;
font-size: small;
}
.instructions {
font-size: small;
}
#colors {
margin-bottom: 20px;
}
#colorList {
height: 30px;
width: 400px;
}
.slider {
width: 200px;
margin-left: 20px;
margin-bottom: 20px;
}
</style>
<script type="text/javascript" src="http://code.jquery.com/jquery-latest.js"></script>
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jqueryui/1.10.3/jquery-ui.js"></script>
<script type="text/javascript" src="farbtastic/farbtastic.js"></script>
<link rel="stylesheet" href="farbtastic/farbtastic.css" type="text/css" />
<link rel="stylesheet" href="http://code.jquery.com/ui/1.10.3/themes/smoothness/jquery-ui.css">
<script>
var rainbow_hex = [
'#000000',
'#ffffff',
'#bbbbbb',
'#777777',
'#333333',
'#ff0000',
'#ff9200',
'#fffd00',
'#03ff00',
'#00ffff',
'#0003ff',
'#7f00ff',
'#ff00ff'
];
var rainbow_hex_tmp = get('rainbow');
if(rainbow_hex_tmp) {
rainbow_hex = rainbow_hex_tmp.split(',');
console.log(rainbow_hex);
}
var palette_hex = [
'#000000',
'#222034',
'#45283C',
'#663931',
'#8F563B',
'#DF7126',
'#D9A066',
'#EEC39A',
'#FBF236',
'#99E550',
'#6ABE30',
'#37946E',
'#4B692F',
'#524B24',
'#323C39',
'#3F3F74',
'#306082',
'#5B6EE1',
'#639BFF',
'#5FCDE4',
'#CBDBFC',
'#FFFFFF',
'#9BADB7',
'#847E87',
'#696A6A',
'#595652',
'#76428A',
'#AC3232',
'#D95763',
'#D77BBA',
'#8F974A',
'#8A6F30'
];
var rainbow = [];
var rainbowAdjustments = [];
var palette = [];
var COLORS = 5;
var excludeMatches;
var img;
var canvas = document.createElement('canvas');
canvas.width = 96;
canvas.height = 80;
var ctx = canvas.getContext('2d');
var imgBufferCanvas = document.createElement('canvas');
var imgBuffer = imgBufferCanvas.getContext('2d');
var selectedColor = 1;
var imageDataTimeout;
var rainbowBufferCanvas;
var rainbowBuffer;
var paletteBufferCanvas;
var paletteBuffer;
var bugAlert = false;
$(function() {
//var canvas = $('#canvas');
//ctx = canvas[0].getContext('2d');
rainbowBufferCanvas = $('#rainbowBufferCanvas')[0];
rainbowBufferCanvas.width = 100 * rainbow_hex.length;
rainbowBufferCanvas.height = 80;
rainbowBuffer = rainbowBufferCanvas.getContext('2d');
paletteBufferCanvas = $('#paletteBufferCanvas')[0];
paletteBufferCanvas.width = 16 * rainbow_hex.length;
paletteBufferCanvas.height = 96;
paletteBuffer = paletteBufferCanvas.getContext('2d');
$('#instructions').click(function() {
$('.instructions').slideToggle();
});
$('#rainbowPreview').on('click', '.color', function() {
if($(this).index() > 0) {
$('.color').removeClass('selected');
$(this).addClass('selected');
selectedColor = $(this).index();
$.farbtastic('#selectedPicker').setColor(hexColor(rainbow[selectedColor]));
$('#selectedReflectivitySlider').slider("value", rainbowAdjustments[selectedColor].r);
$('#selectedIlluminationSlider').slider("value", rainbowAdjustments[selectedColor].illum);
$('#selectedHlSlider').slider("value", rainbowAdjustments[selectedColor].hm);
$('#selectedContrastSlider').slider("value", rainbowAdjustments[selectedColor].con);
$('#selectedBrightnessSlider').slider("value", rainbowAdjustments[selectedColor].bri);
}
});
$('#rainbowCanvas, #rainbowimg').click(function(e) {
var parentOffset = $(this).parent().offset();
var relX = e.pageX - parentOffset.left;
var index = Math.floor(relX / 100);
if(index > 0) {
$('#rainbowPreview .color').removeClass('selected');
$('#rainbowPreview .color').eq(index).addClass('selected');
selectedColor = index;
$.farbtastic('#selectedPicker').setColor(hexColor(rainbow[selectedColor]));
$('#selectedReflectivitySlider').slider("value", rainbowAdjustments[selectedColor].r);
$('#selectedIlluminationSlider').slider("value", rainbowAdjustments[selectedColor].illum);
$('#selectedHlSlider').slider("value", rainbowAdjustments[selectedColor].hm);
$('#selectedContrastSlider').slider("value", rainbowAdjustments[selectedColor].con);
$('#selectedBrightnessSlider').slider("value", rainbowAdjustments[selectedColor].bri);
}
});
for(var i = 0; i < palette_hex.length; i++) {
palette.push(getColor(palette_hex[i]));
}
for(var i = 0; i < rainbow_hex.length; i++) {
rainbow.push(getColor(rainbow_hex[i]));
}
rainbowAdjustments = JSON.parse(get('adjustments', false));
if(!rainbowAdjustments) {
rainbowAdjustments = [];
for(var i = 0; i < rainbow.length; i++) {
rainbowAdjustments.push({ r: 100, illum: 100, hm: 100, con: 100, bri: 100 });
}
}
img = new Image();
img.onload = function() {
imgBuffer.drawImage(img, 0, 0, 96, 80);
$('#reflectivitySlider').slider({ max: 100, slide: calculate, stop: calculate, step: 0.5, value: get('r', 0) });
$('#illuminationSlider').slider({ max: 100, slide: calculate, stop: calculate, step: 0.5, value: get('illum', 50) });
$('#brightnessSlider').slider({ max: 100, slide: calculate, stop: calculate, step: 0.5, value: get('b', 50) });
$('#contrastSlider').slider({ max: 200, slide: calculate, stop: calculate, step: 0.5, value: get('c', 100) });
$('#hlSlider').slider({ max: 100, slide: calculate, stop: calculate, step: 0.5, value: get('hm', 0) });
$('#selectedReflectivitySlider').slider({ max: 200, slide: calculate, stop: calculate, step: 0.1, value: 100 });
$('#selectedIlluminationSlider').slider({ max: 200, slide: calculate, stop: calculate, step: 0.1, value: 100 });
$('#selectedBrightnessSlider').slider({ max: 200, slide: calculate, stop: calculate, step: 0.1, value: 100 });
$('#selectedContrastSlider').slider({ max: 200, slide: calculate, stop: calculate, step: 0.1, value: 100 });
$('#selectedHlSlider').slider({ max: 400, slide: calculate, stop: calculate, step: 0.1, value: 100 });
$('#saturationSlider').slider({ max: 100, slide: calculate, stop: calculate, step: 0.5, value: get('s', 0) });
$('#darkenSlider').slider({ max: 100, slide: calculate, stop: calculate, step: 0.5, value: get('d', 0) });
$('#tintSlider').slider({ max: 100, slide: calculate, stop: calculate, step: 0.5, value: get('t', 0) });
$('.picker').mousemove(function() {
calculate();
});
$('.picker').mouseup(function() {
calculate();
});
$('#selectedPicker').mousemove(updateRainbowColor);
$('#selectedPicker').mouseup(updateRainbowColor);
calculate();
}
img.src = 'puzzle.png';
$('#objectColor').val(get('co', '#8a8a8a'));
$('#highlightColor').val(get('ch', '#ffffd1'));
$('#ambientColor').val(get('ca', '#15306f'));
$('#selectedColor').val(hexColor(rainbow[selectedColor]));
$('#objectPicker').farbtastic('#objectColor');
$('#highlightPicker').farbtastic('#highlightColor');
$('#ambientPicker').farbtastic('#ambientColor');
$('#selectedPicker').farbtastic('#selectedColor');
$('#addRainbowColor').click(function() {
rainbow_hex.push('#000000');
rainbow.push(getColor('#000000'));
rainbowBufferCanvas.width = 100 * rainbow_hex.length;
paletteBufferCanvas.width = 16 * rainbow_hex.length;
rainbowAdjustments.push({ r: 100, illum: 100, hm: 100, con: 100, bri: 100 });
calculate();
});
$('#removeRainbowColor').click(function() {
if(rainbow.length > 1) {
rainbow.splice(selectedColor, 1);
rainbow_hex.splice(selectedColor, 1);
rainbowAdjustments.splice(selectedColor, 1);
if(selectedColor >= rainbow.length) selectedColor = rainbow.length - 1;
rainbowBufferCanvas.width = 100 * rainbow_hex.length;
paletteBufferCanvas.width = 16 * rainbow_hex.length;
calculate();
}
});
});
function calculate() {
$('#rainbowimg').hide();
$('#rampImg').hide();
$('#rainbowCanvas').show();
$('#rampCanvas').show();
var i;
var results = [];
var hexResults = [];
excludeMatches = {};
var co = getColor($('#objectColor').val());
var ch = getColor($('#highlightColor').val());
var ca = getColor($('#ambientColor').val());
var tint = parseInt($('#tintSlider').slider("value")) / 100;
var sat = parseInt($('#saturationSlider').slider("value")) / 100;
var dark = 1 - parseInt($('#darkenSlider').slider("value")) / 100;
var bookmark = '';
bookmark += "?co=" + escape($('#objectColor').val());
bookmark += "&ch=" + escape($('#highlightColor').val());
bookmark += "&ca=" + escape($('#ambientColor').val());
bookmark += "&r=" + $('#reflectivitySlider').slider("value");
bookmark += "&c=" + $('#contrastSlider').slider("value");
bookmark += "&illum=" + $('#illuminationSlider').slider("value");
bookmark += "&hm=" + $('#hlSlider').slider("value");
bookmark += "&s=" + $('#saturationSlider').slider("value");
bookmark += "&d=" + $('#darkenSlider').slider("value");
bookmark += "&t=" + $('#tintSlider').slider("value");
bookmark += "&rainbow=" + escape(rainbow_hex.join(","));
bookmark += "&adjustments=" + escape(JSON.stringify(rainbowAdjustments));
$('#bookmark').html('<a href="' + bookmark + '" target="_blank">Bookmark Result</a>');
var rainbowPreview = '';
paletteBuffer.fillStyle = '#666666';
paletteBuffer.fillRect(0, 0, paletteBufferCanvas.width, paletteBufferCanvas.height);
rainbow[0] = getColor($('#objectColor').val());
rainbowAdjustments[selectedColor].r = parseFloat($('#selectedReflectivitySlider').slider("value"));
rainbowAdjustments[selectedColor].illum = parseFloat($('#selectedIlluminationSlider').slider("value"));
rainbowAdjustments[selectedColor].hm = parseFloat($('#selectedHlSlider').slider("value"));
rainbowAdjustments[selectedColor].con = parseFloat($('#selectedContrastSlider').slider("value"));
rainbowAdjustments[selectedColor].bri = parseFloat($('#selectedBrightnessSlider').slider("value"));
for(var k = 0; k < rainbow.length; k++) {
results = [];
hexResults = [];
excludeMatches = {};
ch = getColor($('#highlightColor').val());
co = average(rainbow[k], getColor($('#objectColor').val()), 1 - tint);
co = desaturate(co, sat);
co = darken(co, dark);
var colorClass = '';
if(k == selectedColor) {
colorClass = ' selected';
}
rainbowPreview += "<div class='color" + colorClass + "' style='background-color: " + hexColor(co) + "'></div>";
drawRefSwatch(rainbow[k], k);
var r = parseFloat($('#reflectivitySlider').slider("value"));
var illum = parseFloat($('#illuminationSlider').slider("value"));
var hm = parseFloat($('#hlSlider').slider("value"));
var con = parseFloat($('#contrastSlider').slider("value"));
var bri = parseFloat($('#brightnessSlider').slider("value"));
var adj = getAdjustedValues(k, r, illum, hm, con, bri);
adj.r /= 100;
adj.illum = Math.pow(.15, adj.illum / 50 - 1);
adj.hm = adj.hm / 25 + 1;
adj.con /= 100;
adj.bri = adj.bri / 100 - .5;
for(i = 0; i < COLORS; i++) {
var weight = Math.pow(i / (COLORS - 1), adj.illum);
weight = (weight - .5) * adj.con + .5;
weight -= adj.bri;
weight = Math.min(1, weight);
weight = Math.max(0, weight);
ch = multiply(ch, adj.hm);
var light = average(ca, ch, weight);
var result = multiply(co, light);
result = average(light, result, adj.r);
var closest = closestMatch(palette, result);
results.push(closest);
}
// Sort by luminance
for(i = 0; i < COLORS; i++) {
for(var j = 0; j < COLORS - 1; j++) {
if(luminance(results[j]) < luminance(results[j+1])) {
var x = results[j];
results[j] = results[j+1];
results[j+1] = x;
}
}
}
for(i = 0; i < COLORS; i++) {
drawSwatch(results[i], k, i);
}
var imgData = imgBuffer.getImageData(0, 0, 96, 80);
var nonZero = false;
for(var i = 0; i < 96 * 80; i++) {
var c = null;
var rv = imgData.data[i*4];
if(rv == 222) {
c = 0;
nonZero = true;
} else if(rv == 133) {
c = 1;
} else if(rv == 117) {
c = 2;
} else if(rv == 78) {
c = 3;
} else if(rv == 20) {
c = 4;
}
if(c !== null) {
imgData.data[i*4] = Math.round(results[c].r * 255);
imgData.data[i*4+1] = Math.round(results[c].g * 255);
imgData.data[i*4+2] = Math.round(results[c].b * 255);
}
}
if(!nonZero && !bugAlert) {
bugAlert = true;
alert("There is a bug in Firefox and Chrome in Windows 8 that prevents this program from working correctly. If you are seeing this message, you should try running it in IE.");
}
rainbowBuffer.putImageData(imgData, k*100, 0);
}
$('#rainbowPreview').html(rainbowPreview);
// Do this so Chrome and IE users can save the palette.
if(imageDataTimeout) window.clearTimeout(imageDataTimeout);
imageDataTimeout = setTimeout(updateImages, 2000);
}
function updateImages() {
output = rainbowBufferCanvas.toDataURL("image/png");
$('#rainbowimg').html('<img src="' + output + '"/>');
output = paletteBufferCanvas.toDataURL("image/png");
$('#rampImg').html('<img src="' + output + '"/>');
$('#rainbowCanvas').hide();
$('#rampCanvas').hide();
$('#rainbowimg').show();
$('#rampImg').show();
}
function updateRainbowColor() {
rainbow_hex[selectedColor] = $('#selectedColor').val();
rainbow[selectedColor] = getColor(rainbow_hex[selectedColor]);
calculate();
}
function getColor(hex) {
var color = {};
hex = hex.substr(1);
color.r = parseInt("0x" + hex.substr(0, 2)) / 255;
color.g = parseInt("0x" + hex.substr(2, 2)) / 255;
color.b = parseInt("0x" + hex.substr(4, 2)) / 255;
return color;
}
function closestMatch(pal, c) {
var distance = null;
var match = 0;
var i;
for(i = 0; i < pal.length; i++) {
var p = pal[i];
var d = Math.sqrt(Math.pow(c.r - p.r, 2) + Math.pow(c.g - p.g, 2) + Math.pow(c.b - p.b, 2));
if((distance === null || d < distance) && excludeMatches[i] === undefined) {
distance = d;
match = i;
}
}
excludeMatches[match] = true;
return pal[match];
}
function luminance(c) {
return 0.299*c.r + 0.587*c.g + 0.114*c.b;
}
function multiply(color1, color2) {
var result = { r: color1.r, g: color1.g, b: color1.b };
if(typeof color2 === "number") {
result.r *= color2;
result.g *= color2;
result.b *= color2;
} else {
result.r *= color2.r;
result.g *= color2.g;
result.b *= color2.b;
}
return result;
}
function average(color1, color2, weight) {
return {
r: color1.r * weight + color2.r * (1 - weight),
g: color1.g * weight + color2.g * (1 - weight),
b: color1.b * weight + color2.b * (1 - weight)
};
}
function hexColor(color) {
var result = '#';
var r = Math.round(color.r * 255).toString(16);
var g = Math.round(color.g * 255).toString(16);
var b = Math.round(color.b * 255).toString(16);
if(r.length == 1) r = "0" + r;
if(g.length == 1) g = "0" + g;
if(b.length == 1) b = "0" + b;
result += r + g + b;
return result;
}
function get(name, def) {
name = name.replace(/[\[]/, "\\\[").replace(/[\]]/, "\\\]");
var regex = new RegExp("[\\?&]" + name + "=([^&#]*)"),
results = regex.exec(location.search);
return results == null ? def : decodeURIComponent(results[1].replace(/\+/g, " "));
}
function desaturate(c, k) {
return average({r:1, g:1, b:1}, c, k);
}
function darken(c, k) {
return multiply(c, {r:k, g:k, b:k});
}
function drawSwatch(c, sx, sy) {
paletteBuffer.fillStyle = hexColor(c);
paletteBuffer.fillRect(sx * 16, (sy + 1) * 16, 16, 16);
}
function drawRefSwatch(c, sx) {
paletteBuffer.fillStyle = hexColor(c);
paletteBuffer.fillRect(sx * 16 + 2, 2, 12, 12);
}
function getAdjustedValues(index, r, illum, hm, con, bri) {
var adj = rainbowAdjustments[index];
var result = {};
result.r = r + parseFloat(adj.r) - 100;
result.illum = illum + parseFloat(adj.illum) - 100;
result.hm = hm + parseFloat(adj.hm) - 100;
result.con = con + parseFloat(adj.con) - 100;
result.bri = bri + parseFloat(adj.bri) - 100;
for(var i in result) {
if(i == 'con') {
result[i] = Math.min(result[i], 200);
} else {
result[i] = Math.min(result[i], 100);
}
result[i] = Math.max(result[i], 0);
}
return result;
}
</script>
</head>
<body>
<a href='README.md'>What do all these settings do?</a><br>
<div class='container'>
Tint color:<br>
<input type='text' name='objectColor' id='objectColor' value='#8a8a8a'>
<div id='objectPicker' class='picker'></div>
</div>
<div class='container'>
Highlight color:<br>
<input type='text' name='highlightColor' id='highlightColor' value='#ffffd1'>
<div id='highlightPicker' class='picker'></div>
</div>
<div class='container'>
Ambient color:<br>
<input type='text' name='ambientColor' id='ambientColor' value='#15306f'>
<div id='ambientPicker' class='picker'></div>
</div>
<div class='container'>
Selected rainbow color:<br>
<input type='text' name='selectedColor' id='selectedColor' value='#15306f'>
<div id='selectedPicker'></div>
</div>
<br>
Adjust all colors:<br>
<div class='container'>
Reflectivity: (--> More reflective)<br>
<div id="reflectivitySlider" class='slider'></div>
</div>
<div class='container'>
Illumination: (--> Darker)<br>
<div id="illuminationSlider" class='slider'></div>
</div>
<div class='container'>
Highlight Multiplier: (--> Brighter)<br>
<div id="hlSlider" class='slider'></div>
</div>
<div class='container'>
Brightness:<br>
<div id="brightnessSlider" class='slider'></div>
</div>
<div class='container'>
Contrast:<br>
<div id="contrastSlider" class='slider'></div>
</div>
<br>
Adjust selected color:<br>
<div class='container'>
Reflectivity: (--> More reflective)<br>
<div id="selectedReflectivitySlider" class='slider'></div>
</div>
<div class='container'>
Illumination: (--> Darker)<br>
<div id="selectedIlluminationSlider" class='slider'></div>
</div>
<div class='container'>
Highlight Multiplier: (--> Brighter)<br>
<div id="selectedHlSlider" class='slider'></div>
</div>
<div class='container'>
Brightness:<br>
<div id="selectedBrightnessSlider" class='slider'></div>
</div>
<div class='container'>
Contrast:<br>
<div id="selectedContrastSlider" class='slider'></div>
</div>
<br>
Rainbow controls:<br>
<div class='container'>
Tint (Rainbow --> Object color): <br>
<div id="tintSlider" class='slider'></div>
</div>
<div class='container'>
Desaturate: <br>
<div id="saturationSlider" class='slider'></div>
</div>
<div class='container'>
Darken: <br>
<div id="darkenSlider" class='slider'></div>
</div>
<br>
<div id='colors'>
Rainbow (before processing):<br>
<div id='rainbowPreview'></div>
<button id='addRainbowColor'>Add Color</button> <button id='removeRainbowColor'>Remove Selected Color</button><br><br>
Swatches:<br>
<div id='rampCanvas'><canvas id='paletteBufferCanvas'></canvas></div>
<div id='rampImg' style='display: none'></div>
<div id='bookmark'></div>
</div>
<div id='preview'>
Preview:<br>
<div id='rainbowCanvas'><canvas id='rainbowBufferCanvas'></canvas></div>
<div id='rainbowimg' style='display: none'></div>
</div>
<a href='https://github.com/lendrick/Gradientifier/archive/master.zip'>Download latest version</a> from <a href='https://github.com/lendrick/Gradientifier'>the GitHub repository</a>.
</body>
</html>