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index.html
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<html>
<head>
<title> Basis Viewer </title>
<link rel='icon' type='image/png' href='/emoji.png'>
<style>
@import url('https://rsms.me/inter/inter.css');
html {
font-family: 'Inter', sans-serif;
color: azure;
}
@supports (font-variation-settings: normal) {
html {
font-family: 'Inter var', sans-serif;
}
}
body {
display: flex;
justify-content: center;
align-items: center;
background-color: #333333;
flex-direction: column;
}
input[type="file"] {
display: none;
}
.custom-file-upload {
border: 2px solid rgb(240, 255, 255);
padding: 5px 10px;
cursor: pointer;
}
.lds-ripple {
display: inline-block;
position: relative;
width: 80px;
height: 80px;
}
.lds-ripple div {
position: absolute;
border: 4px solid #fff;
opacity: 1;
border-radius: 50%;
animation: lds-ripple 1s cubic-bezier(0, 0.2, 0.8, 1) infinite;
}
.lds-ripple div:nth-child(2) {
animation-delay: -0.5s;
}
@keyframes lds-ripple {
0% {
top: 36px;
left: 36px;
width: 0;
height: 0;
opacity: 1;
}
100% {
top: 0px;
left: 0px;
width: 72px;
height: 72px;
opacity: 0;
}
}
#loading {
position: absolute;
z-index: 10000000;
width: 100vw;
height: 100vh;
display: none;
justify-content: center;
align-items: center;
background-color: #333333a2;
}
</style>
<script src='./renderer.js'></script>
<script src='./dxt-to-rgb565.js'></script>
<script src='./transcoder/build/basis_transcoder.js'></script>
<script type='text/javascript'>
let loading = state => {
console.log(state);
if (state) {
document.getElementById('loading').style.display = 'flex';
} else {
document.getElementById('loading').style.display = 'none';
}
}
function log(s) {
console.log(s);
}
function logTime(desc, t) {
log(t + 'ms ' + desc);
}
function isDef(v) {
return typeof v != 'undefined';
}
function elem(id) {
return document.getElementById(id);
}
formatTable = function (rows) {
var colLengths = [];
for (var i = 0; i < rows.length; i++) {
var row = rows[i];
for (var j = 0; j < row.length; j++) {
if (colLengths.length <= j) colLengths.push(0);
if (colLengths[j] < row[j].length) colLengths[j] = row[j].length;
}
}
function formatRow(row) {
var parts = [];
for (var i = 0; i < colLengths.length; i++) {
var s = row.length > i ? row[i] : '';
var padding = (new Array(1 + colLengths[i] - s.length)).join(' ');
if (s && s[0] >= '0' && s[0] <= '9') {
// Right-align numbers.
parts.push(padding + s);
} else {
parts.push(s + padding);
}
}
return parts.join(' | ');
}
var width = 0;
for (var i = 0; i < colLengths.length; i++) {
width += colLengths[i];
// Add another 3 for the separator.
if (i != 0) width += 3;
}
var lines = [];
lines.push(formatRow(rows[0]));
lines.push((new Array(width + 1)).join('-'));
for (var i = 1; i < rows.length; i++) {
lines.push(formatRow(rows[i]));
}
return lines.join('\n');
};
function loadArrayBuffer(uri, callback) {
log('Loading ' + uri + '...');
var xhr = new XMLHttpRequest();
xhr.responseType = 'arraybuffer';
xhr.open('GET', uri, true);
xhr.onreadystatechange = function (e) {
if (xhr.readyState == 4 && xhr.status == 200) {
callback(xhr.response);
}
}
xhr.send(null);
}
// ASTC format, from:
// https://www.khronos.org/registry/webgl/extensions/WEBGL_compressed_texture_astc/
COMPRESSED_RGBA_ASTC_4x4_KHR = 0x93B0;
// DXT formats, from:
// http://www.khronos.org/registry/webgl/extensions/WEBGL_compressed_texture_s3tc/
COMPRESSED_RGB_S3TC_DXT1_EXT = 0x83F0;
COMPRESSED_RGBA_S3TC_DXT1_EXT = 0x83F1;
COMPRESSED_RGBA_S3TC_DXT3_EXT = 0x83F2;
COMPRESSED_RGBA_S3TC_DXT5_EXT = 0x83F3;
// BC7 format, from:
// https://www.khronos.org/registry/webgl/extensions/EXT_texture_compression_bptc/
COMPRESSED_RGBA_BPTC_UNORM = 0x8E8C;
// ETC format, from:
// https://www.khronos.org/registry/webgl/extensions/WEBGL_compressed_texture_etc1/
COMPRESSED_RGB_ETC1_WEBGL = 0x8D64;
// PVRTC format, from:
// https://www.khronos.org/registry/webgl/extensions/WEBGL_compressed_texture_pvrtc/
COMPRESSED_RGB_PVRTC_4BPPV1_IMG = 0x8C00;
COMPRESSED_RGBA_PVRTC_4BPPV1_IMG = 0x8C02;
BASIS_FORMAT = {
cTFETC1: 0,
cTFETC2: 1,
cTFBC1: 2,
cTFBC3: 3,
cTFBC4: 4,
cTFBC5: 5,
cTFBC7: 6,
cTFPVRTC1_4_RGB: 8,
cTFPVRTC1_4_RGBA: 9,
cTFASTC_4x4: 10,
cTFATC_RGB: 11,
cTFATC_RGBA_INTERPOLATED_ALPHA: 12,
cTFRGBA32: 13,
cTFRGB565: 14,
cTFBGR565: 15,
cTFRGBA4444: 16,
};
BASIS_FORMAT_NAMES = {};
for (var name in BASIS_FORMAT) {
BASIS_FORMAT_NAMES[BASIS_FORMAT[name]] = name;
}
DXT_FORMAT_MAP = {};
DXT_FORMAT_MAP[BASIS_FORMAT.cTFBC1] = COMPRESSED_RGB_S3TC_DXT1_EXT;
DXT_FORMAT_MAP[BASIS_FORMAT.cTFBC3] = COMPRESSED_RGBA_S3TC_DXT5_EXT;
DXT_FORMAT_MAP[BASIS_FORMAT.cTFBC7] = COMPRESSED_RGBA_BPTC_UNORM;
var astcSupported = false;
var etcSupported = false;
var dxtSupported = false;
var bc7Supported = false;
var pvrtcSupported = false;
var drawMode = 0;
var tex, width, height, images, levels, have_alpha, alignedWidth, alignedHeight, format, displayWidth, displayHeight;
function redraw() {
if (!width)
return;
renderer.drawTexture(tex, displayWidth, displayHeight, drawMode);
}
function dataLoaded(data) {
log('Done loading .basis file, decoded header:');
const { BasisFile, initializeBasis } = Module;
initializeBasis();
const startTime = performance.now();
const basisFile = new BasisFile(new Uint8Array(data));
width = basisFile.getImageWidth(0, 0);
height = basisFile.getImageHeight(0, 0);
images = basisFile.getNumImages();
levels = basisFile.getNumLevels(0);
has_alpha = basisFile.getHasAlpha();
if (!width || !height || !images || !levels) {
console.warn('Invalid .basis file');
basisFile.close();
basisFile.delete();
return;
}
// Note: If the file is UASTC, the preferred formats are ASTC/BC7.
// If the file is ETC1S and doesn't have alpha, the preferred formats are ETC1 and BC1. For alpha, the preferred formats are ETC2, BC3 or BC7.
var formatString = 'UNKNOWN';
if (astcSupported) {
formatString = 'ASTC';
format = BASIS_FORMAT.cTFASTC_4x4;
}
else if (bc7Supported) {
formatString = 'BC7';
format = BASIS_FORMAT.cTFBC7;
}
else if (dxtSupported) {
if (has_alpha) {
formatString = 'BC3';
format = BASIS_FORMAT.cTFBC3;
}
else {
formatString = 'BC1';
format = BASIS_FORMAT.cTFBC1;
}
}
else if (pvrtcSupported) {
if (has_alpha) {
formatString = 'PVRTC1_RGBA';
format = BASIS_FORMAT.cTFPVRTC1_4_RGBA;
}
else {
formatString = 'PVRTC1_RGB';
format = BASIS_FORMAT.cTFPVRTC1_4_RGB;
}
if (
((width & (width - 1)) != 0) || ((height & (height - 1)) != 0)
) {
log('ERROR: PVRTC1 requires square power of 2 textures');
}
if (width != height) {
log('ERROR: PVRTC1 requires square power of 2 textures');
}
}
else if (etcSupported) {
formatString = 'ETC1';
format = BASIS_FORMAT.cTFETC1;
}
else {
formatString = 'RGB565';
format = BASIS_FORMAT.cTFRGB565;
log('Decoding .basis data to 565');
}
if (!basisFile.startTranscoding()) {
log('startTranscoding failed');
console.warn('startTranscoding failed');
basisFile.close();
basisFile.delete();
return;
}
const dstSize = basisFile.getImageTranscodedSizeInBytes(0, 0, format);
const dst = new Uint8Array(dstSize);
log(dstSize);
// if (!basisFile.transcodeImage(dst, 0, 0, format, 1, 0)) {
if (!basisFile.transcodeImage(dst, 0, 0, format, 0, 0)) {
log('basisFile.transcodeImage failed');
console.warn('transcodeImage failed');
basisFile.close();
basisFile.delete();
return;
}
const elapsed = performance.now() - startTime;
basisFile.close();
basisFile.delete();
log('width: ' + width);
log('height: ' + height);
log('images: ' + images);
log('first image mipmap levels: ' + levels);
log('has_alpha: ' + has_alpha);
logTime('transcoding time', elapsed.toFixed(2));
alignedWidth = (width + 3) & ~3;
alignedHeight = (height + 3) & ~3;
displayWidth = alignedWidth;
displayHeight = alignedHeight;
var canvas = elem('canvas');
canvas.width = alignedWidth;
canvas.height = alignedHeight;
loading(false);
if (format === BASIS_FORMAT.cTFASTC_4x4) {
tex = renderer.createCompressedTexture(dst, alignedWidth, alignedHeight, COMPRESSED_RGBA_ASTC_4x4_KHR);
}
else if ((format === BASIS_FORMAT.cTFBC3) || (format === BASIS_FORMAT.cTFBC1) || (format == BASIS_FORMAT.cTFBC7)) {
tex = renderer.createCompressedTexture(dst, alignedWidth, alignedHeight, DXT_FORMAT_MAP[format]);
}
else if (format === BASIS_FORMAT.cTFETC1) {
tex = renderer.createCompressedTexture(dst, alignedWidth, alignedHeight, COMPRESSED_RGB_ETC1_WEBGL);
}
else if (format === BASIS_FORMAT.cTFPVRTC1_4_RGB) {
tex = renderer.createCompressedTexture(dst, alignedWidth, alignedHeight, COMPRESSED_RGB_PVRTC_4BPPV1_IMG);
}
else if (format === BASIS_FORMAT.cTFPVRTC1_4_RGBA) {
tex = renderer.createCompressedTexture(dst, alignedWidth, alignedHeight, COMPRESSED_RGBA_PVRTC_4BPPV1_IMG);
}
else {
canvas.width = width;
canvas.height = height;
displayWidth = width;
displayHeight = height;
// Create 565 texture.
var dstTex = new Uint16Array(width * height);
// Convert the array of bytes to an array of uint16's.
var pix = 0;
for (var y = 0; y < height; y++)
for (var x = 0; x < width; x++, pix++)
dstTex[pix] = dst[2 * pix + 0] | (dst[2 * pix + 1] << 8);
tex = renderer.createRgb565Texture(dstTex, width, height);
}
redraw();
}
</script>
</head>
<body>
<div id="loading">
<div class="lds-ripple">
<div></div>
<div></div>
</div>
</div>
<canvas id='canvas'></canvas>
<br>
<input type='file' multiple id='inputEl' class="" />
<label for="inputEl" class="custom-file-upload">
Select a .basis file
</label>
<p> or Drag and Drop a .basis file</p>
</body>
<script>
loading(true);
BASIS({
onRuntimeInitialized: () => {
var gl = elem('canvas').getContext('webgl');
astcSupported = !!gl.getExtension('WEBGL_compressed_texture_astc');
etcSupported = !!gl.getExtension('WEBGL_compressed_texture_etc1');
dxtSupported = !!gl.getExtension('WEBGL_compressed_texture_s3tc');
pvrtcSupported = !!(gl.getExtension('WEBGL_compressed_texture_pvrtc')) || !!(gl.getExtension('WEBKIT_WEBGL_compressed_texture_pvrtc'));
bc7Supported = !!gl.getExtension('EXT_texture_compression_bptc');
// HACK HACK - for testing uncompressed
//astcSupported = false;
//etcSupported = false;
//dxtSupported = false;
//bc7Supported = false;
//pvrtcSupported = false;
window.renderer = new Renderer(gl);
// elem('file').addEventListener('keydown', function (e) {
// if (e.keyCode == 13) {
// runLoadFile();
// }
// }, false);
if (!(astcSupported || etcSupported || dxtSupported || pvrtcSupported)) {
// elem('nodxt').style.display = 'block';
}
loadArrayBuffer('./kodim20.basis', dataLoaded);
}
}).then(module => window.Module = module);
</script>
<script type='module'>
import { SimpleDropzone } from 'https://raw.githack.com/donmccurdy/simple-dropzone/master/dist/simple-dropzone.module.js';
let fileType = path => {
return path.split(".").pop();
};
const dropzone = new SimpleDropzone(document.body, inputEl);
dropzone.on('drop', ({ files, archive }) => {
loading(true);
files = Array.from(files);
let blobURL = URL.createObjectURL(files[0][1]);
if (fileType(files[0][0]) === 'basis') {
loadArrayBuffer(blobURL, dataLoaded);
} else {
alert('Please choose a .basis file');
}
});
</script>
</html>