220 lines
7.0 KiB
HTML
220 lines
7.0 KiB
HTML
<!doctype html>
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<!--[if lt IE 7 ]> <html class="ie ie6 ie-lt10 ie-lt9 ie-lt8 ie-lt7 no-js" lang="en"> <![endif]-->
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<!--[if IE 7 ]> <html class="ie ie7 ie-lt10 ie-lt9 ie-lt8 no-js" lang="en"> <![endif]-->
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<!--[if IE 8 ]> <html class="ie ie8 ie-lt10 ie-lt9 no-js" lang="en"> <![endif]-->
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<!--[if IE 9 ]> <html class="ie ie9 ie-lt10 no-js" lang="en"> <![endif]-->
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<!--[if gt IE 9]><!--><html class="no-js" lang="en"><!--<![endif]-->
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<head>
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<meta charset="utf-8">
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<!--
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HTML5 Reset: https://github.com/murtaugh/HTML5-Reset
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Free to use
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-->
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<meta http-equiv="X-UA-Compatible" content="IE=edge">
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<title>LUT image transform proof of concept</title>
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<meta name="author" content="Peter Marquardt" />
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<meta name="description" content="Proof of concept" />
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<meta name="Copyright" content="Peter Marquardt" />
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<meta name="viewport" content="width=device-width, initial-scale=1">
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<link rel="stylesheet" href="assets/css/reset.css" />
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<style>
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img {
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border: 1px solid orange;
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}
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canvas {
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display: none;
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}
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pre {
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border: 1px solid green;
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}
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</style>
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</head>
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<body>
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<div class="wrapper">
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<img id="surf" />
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<img id="shad" />
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<img id="spec" />
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<canvas id="result" width="1" height="1"></canvas>
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<pre id="surfpre"></pre>
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<pre id="shadpre"></pre>
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<pre id="specpre"></pre>
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</div>
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<script src="assets/js/libs/jquery-1.11.3.min.js"></script>
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<script>
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function initPage(){
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var canvas = document.getElementById('result');
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var context = canvas.getContext('2d');
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var surface = new Image();
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var shadow = new Image();
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var spec = new Image();
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surface.onload = function() {
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shadow.onload = function() {
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spec.onload = function() {
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makeMaps(context, surface , shadow, spec);
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}
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spec.src = 'wfspec.png';
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}
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shadow.src = 'wfshad.png';
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};
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surface.src = 'wfsurf.png';
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function dec2bin(dec){
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return (dec >>> 0).toString(2);
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}
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function makeMaps(context, surfaceObj, shadowObj, specObj) {
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var canvas = context.canvas;
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var lut = {};
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lut.width = 256;
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lut.height = 256;
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canvas.width = shadowObj.width;
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canvas.height = shadowObj.height;
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context.drawImage(shadowObj, 0, 0);
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var shadow = context.getImageData(0, 0, canvas.width, canvas.height);
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var shadowdata = shadow.data;
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$('#shad').attr('src', canvas.toDataURL());
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var bitcount = 0;
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var resulttext = "// black and white image data wrapped in bitmaps<br />";
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resulttext += "static uint8_t donutshadow[] = {<br />"
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for(var i = 0; i < shadowdata.length; i += 4) {
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if (i%(4*8) == 0) {
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resulttext += "0b";
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bitcount++;
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}
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if (shadowdata[i]<127) {
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resulttext += 1;
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} else {
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resulttext += 0;
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}
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if (i%(4*8) == (4*7)) {
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resulttext += ",";
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}
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if ((i-(4*8))%(4*8*12) == (4*8*12)-(4*9)) {
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resulttext += "<br />";
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}
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}
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while(i%(4*8) != 0) {
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resulttext += "0";
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i += 4;
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}
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resulttext += ",<br/>};";
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$('#shadpre').html('// '+Math.ceil(bitcount/8)+' bytes<br />'+resulttext);
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bitcount = 0;
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canvas.width = specObj.width;
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canvas.height = specObj.height;
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context.drawImage(specObj, 0, 0);
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var specular = context.getImageData(0, 0, canvas.width, canvas.height);
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var speculardata = specular.data;
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$('#spec').attr('src', canvas.toDataURL());
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resulttext = "// black and white image data wrapped in bitmaps<br />";
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resulttext += "static uint8_t donutspecular[] = {<br />";
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for(var i = 0; i < speculardata.length; i += 4) {
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if (i%(4*8) == 0) {
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resulttext += "0b";
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bitcount++;
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}
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if (speculardata[i]>127) {
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resulttext += 1;
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} else {
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resulttext += 0;
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}
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if (i%(4*8) == (4*7)) {
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resulttext += ",";
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}
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if ((i-(4*8))%(4*8*12) == (4*8*12)-(4*9)) {
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resulttext += "<br />";
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}
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}
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while(i%(4*8) != 0) {
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resulttext += "0";
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i += 4;
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}
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resulttext += ",<br/>};";
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$('#specpre').html('// '+Math.ceil(bitcount/8)+' bytes<br />'+resulttext);
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bitcount = 0;
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canvas.width = surfaceObj.width;
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canvas.height = surfaceObj.height;
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context.drawImage(surfaceObj, 0, 0);
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var surface = context.getImageData(0, 0, canvas.width, canvas.height);
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var surfacedata = surface.data;
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$('#surf').attr('src', canvas.toDataURL());
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var resultarray = new Array();
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var counter = 0;
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resulttext = "// heptets wrapped in octets like 0b00000007,0b11111117,0b22222227,0b33333337,0b44444447,0b55555557,0b66666667<br />";
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resulttext += "static uint8_t donutsurfacemap[] = {<br/>";
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for(var i = 0; i < surfacedata.length; i += 4) {
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counter++;
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if (surfacedata[i+2] > 0) {
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resultarray.push("0000000");
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} else {
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var str = dec2bin(Math.floor(surfacedata[i+1]/2));
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var padded = Array(8-str.length).join('0')+str;
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resultarray.push(padded);
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}
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if (counter%7 == 0) {
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if (surfacedata[i+2] > 0) {
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resultarray[0] += "0";
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resultarray[1] += "0";
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resultarray[2] += "0";
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resultarray[3] += "0";
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resultarray[4] += "0";
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resultarray[5] += "0";
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resultarray[6] += "0";
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} else {
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var str = dec2bin(Math.floor(surfacedata[i+1]/2));
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var padded = Array(8-str.length).join('0')+str;
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resultarray[0] += padded[0];
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resultarray[1] += padded[1];
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resultarray[2] += padded[2];
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resultarray[3] += padded[3];
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resultarray[4] += padded[4];
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resultarray[5] += padded[5];
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resultarray[6] += padded[6];
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}
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resulttext += "0b";
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resulttext += resultarray.join(',0b');
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resultarray = new Array();
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resulttext += ",<br />";
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bitcount += 7*8;
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}
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}
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if (resultarray.length > 0) {
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for (var i = 0; i < resultarray.length; i++) {
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resulttext += "0b"+resultarray[i]+"0,";
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bitcount += 8;
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}
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}
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resulttext += "<br />};";
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$('#surfpre').html('// '+Math.ceil(bitcount/8)+' bytes<br />'+resulttext);
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}
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};
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</script>
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<script>$(document).ready(initPage);</script>
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</body>
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</html>
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