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const fs = require('fs');
const path = require('path');
const gulp = require('gulp');
const sharp = require('sharp');
const tmp = require('tmp');
const execSync = require('child_process').execSync;
const readdirp = require('readdirp');
const assetsPath = '../../app/src/uncompressed_assets';
const assetFilter = ['*.jpg', '*.jpeg', '*.png'];
function compressAsset(source, target, srgb, alpha, done) {
if (fs.existsSync(target)) {
console.log("Already compressed: " + target);
done();
return;
}
const extension = path.extname(source);
if (extension !== ".png") {
// Etc2Tool requires png format
const tempImage = tmp.tmpNameSync() + ".png";
sharp(source)
.toFile(tempImage)
.then(data => {
compressAsset(tempImage, target, srgb, false, done);
})
.catch(err => {
console.log("PNG conversion failed for " + source + ": " + err);
done(err);
});
return;
}
try {
console.log("About to compress: " + target);
var format;
if (srgb) {
format = alpha ? "SRGBA8" : "SRGB8"
} else {
format = alpha ? "RGBA8" : "RGB8"
}
var out = execSync(`EtcTool ${source} -output ${target} -format ${format} -effort 100 -v`).toString();
console.log(out);
done();
} catch (err) {
console.error(err.message);
done(err);
}
}
function compress(done) {
let pending = 0;
let finished = false;
const settings = {
fileFilter: assetFilter
};
readdirp(assetsPath, settings)
.on('data', function (entry) {
pending++;
const name = entry.fullPath;
const extension = path.extname(name);
let target = name.slice(0, -extension.length) + ".ktx";
target = target.replace("uncompressed_assets/", "");
if (target.indexOf("cubemap" >= 0)) {
// Generate SRGBA versions for cubemaps
pending++;
const srgb = true;
const alpha = false;
compressAsset(name, target.replace(".ktx", "_srgb.ktx"), srgb, alpha, function() {
pending--;
if (finished && !pending) {
done();
}
});
}
const srgb = false;
const alpha = true;
compressAsset(name, target, srgb, true, function() {
pending--;
if (finished && !pending) {
done();
}
});
})
.on('warn', function(warn){
console.log("Warn: ", warn);
})
.on('error', function(err){
console.log("Error: ", err);
})
.on('end', function(){
finished = true;
if (!pending) {
done();
}
});
}
exports.compress = compress;