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<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>JPEG Quant Smooth (WebAssembly)</title>
</head>
<body>
<div id=droparea align=center>
<table>
<tr align=center><td colspan=2>
<button id=load disabled style="float: left;">Load</button>
<progress id=progress hidden=true></progress>
<button id=save disabled style="float: right;">Save</button>
</td></tr>
<tr><td>Options: </td>
<td><input id=cmdline size=40 value="--optimize --info 8 --quality 3"></td></tr>
<tr><td>Filename: </td>
<td><input id=filename size=40 value="" disabled></td></tr>
</table>
<br>
<div id=status>You need to enable JavaScript to run this app.</div>
<br>
<textarea id=output cols=80 rows=24 readonly style="resize: none;"></textarea>
</div>
<script type='text/javascript'>
var statusElement = document.getElementById('status');
var progressElement = document.getElementById('progress');
var outputElement = document.getElementById('output');
var loadElement = document.getElementById('load');
var saveElement = document.getElementById('save');
outputElement.value = '';
loadElement.disabled = true;
saveElement.disabled = true;
/* var */ Module = {
preRun: [],
postRun: function() {
initDrop();
loadElement.onclick = cbLoad;
saveElement.onclick = cbSave;
loadElement.disabled = false;
},
print: function(text) {
if (arguments.length > 1) text = Array.prototype.slice.call(arguments).join(' ');
console.log(text);
outputElement.value += text + "\n";
outputElement.scrollTop = outputElement.scrollHeight; // focus on bottom
},
printErr: function(text) {
if (arguments.length > 1) text = Array.prototype.slice.call(arguments).join(' ');
// console.error(text);
console.log(text);
outputElement.value += "!!! " + text + "\n";
outputElement.scrollTop = outputElement.scrollHeight; // focus on bottom
},
setStatus: function(text) {
if (!Module.setStatus.last) Module.setStatus.last = { time: Date.now(), text: '' };
if (text === Module.setStatus.last.text) return;
var m = text.match(/([^(]+)\((\d+(\.\d+)?)\/(\d+)\)/);
var now = Date.now();
if (m && now - Module.setStatus.last.time < 30) return; // if this is a progress update, skip it if too soon
Module.setStatus.last.time = now;
Module.setStatus.last.text = text;
if (m) {
text = m[1];
progressElement.value = parseInt(m[2])*100;
progressElement.max = parseInt(m[4])*100;
progressElement.hidden = false;
} else {
progressElement.hidden = true;
}
statusElement.innerHTML = text;
},
totalDependencies: 0,
monitorRunDependencies: function(left) {
this.totalDependencies = Math.max(this.totalDependencies, left);
Module.setStatus(left ? 'Preparing... (' + (this.totalDependencies-left) + '/' + this.totalDependencies + ')' : 'All downloads complete.');
}
};
Module.setStatus('Downloading...');
window.onerror = function() {
Module.setStatus('Exception thrown, see JavaScript console');
Module.setStatus = function(text) {
if (text) Module.printErr('[post-exception status] ' + text);
};
};
/*============================================================================*/
var output_data = null;
var prm_addr = null;
Module["wasm_progress"] = function(percent) {
progressElement.hidden = false;
progressElement.value = percent;
progressElement.max = 100;
}
function cbProcess(input) {
loadElement.disabled = true;
saveElement.disabled = true;
output_data = null;
var cmdline = document.getElementById('cmdline').value;
var cmd_size = cmdline.length;
var inp_size = input.byteLength;
prm_addr = Module._malloc(5*8 + inp_size + cmd_size + 1);
Module.HEAPU8.set(new Uint8Array(5*8), prm_addr);
var inp_addr = prm_addr + 5*8;
var cmd_addr = prm_addr + 5*8 + inp_size;
Module.HEAPU8.set(new Uint8Array(input), inp_addr);
for (var i = 0; i < cmd_size; i++) {
var c = cmdline.charCodeAt(i);
if (c > 127) c = '?'.charCodeAt(0);
Module.HEAPU8[cmd_addr + i] = c;
}
Module.HEAPU8[cmd_addr + cmd_size] = 0;
Module.print("Input size: " + inp_size);
Module.print("Processing...");
Module.HEAPU32[prm_addr/4] = cmd_addr;
Module.HEAPU32[prm_addr/4 + 1*2] = inp_addr;
Module.HEAPU32[prm_addr/4 + 2*2] = inp_size;
Module._web_main(prm_addr);
}
Module["wasm_return"] = function() {
var out_addr = Module.HEAPU32[prm_addr/4 + 3*2];
var out_size = Module.HEAPU32[prm_addr/4 + 4*2];
Module.print("Output size: " + out_size);
Module._free(prm_addr);
if (out_addr) {
output_data = Module.HEAPU8.slice(out_addr, out_addr + out_size);
Module._free(out_addr);
saveElement.disabled = false;
}
loadElement.disabled = false;
progressElement.hidden = true;
}
function initDrop() {
var dropArea = document; // .getElementById('droparea');
function preventDefaults(e) { e.preventDefault(); e.stopPropagation(); }
['dragenter', 'dragover', 'dragleave', 'drop'].forEach(function(eventName) {
dropArea.addEventListener(eventName, preventDefaults, false);
})
function handleDrop(e) {
var list = e.dataTransfer.files;
if (list.length == 1) readFile(list[0]);
else alert("Multiple file drop unsupported.");
}
dropArea.addEventListener('drop', handleDrop, false);
}
function readFile(file) {
Module.print("Loading \"" + file.name + "\"");
document.getElementById('filename').value = file.name;
document.getElementById('filename').disabled = false;
var reader = new FileReader();
reader.onload = function(e) {
var input_data = e.target.result;
cbProcess(input_data);
};
reader.readAsArrayBuffer(file);
}
function cbLoad() {
var input = document.createElement('input');
input.type = 'file';
input.accept = 'image/jpeg';
input.onchange = function(e) {
var file = e.target.files[0];
readFile(file);
}
input.click();
}
function cbSave() {
if (output_data !== null) {
var blob = new Blob([output_data], {type: "application/unknown"});
var link = document.createElement('a');
link.href = (window.URL || window.webkitURL).createObjectURL(blob);
link.download = document.getElementById('filename').value;
link.click();
} else {
alert("data undefined");
}
}
function setCookie(cname, cvalue, exdays) {
var d = new Date();
d.setTime(d.getTime() + (exdays * 24 * 60 * 60 * 1000));
var expires = "expires=" + d.toUTCString();
document.cookie = cname + "=" + cvalue + ";" + expires + ";path=/";
}
function getCookie(cname) {
var name = cname + "=";
var ca = document.cookie.split(';');
for (var i = 0; i < ca.length; i++) {
var c = ca[i];
while (c.charAt(0) == ' ') c = c.substring(1);
if (c.indexOf(name) == 0) return c.substring(name.length, c.length);
}
return null;
}
{
var options = getCookie('options');
if (options) document.getElementById('cmdline').value = options;
window.onbeforeunload = function() {
var options = document.getElementById('cmdline').value;
setCookie('options', options, 90);
}
}
/*============================================================================*/
</script>
{{{ SCRIPT }}}
</body>
</html>
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