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index.html
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<html>
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<title>PICO-8 Cartridge</title>
<meta name="description" content="">
<STYLE TYPE="text/css">
<!--
html {
color: white;
}
h1 {
color: #ff004d;
text-decoration: underline;
text-decoration-color: white;
}
.gpio_values {
margin-top: 1rem;
display: -webkit-box;
display: flex;
-webkit-box-pack: center;
justify-content: center;
}
.gpio_values > * {
font-weight: bold;
font-size: 24px;
width: 50px;
}
.gpio_values > *.new {
color: #ff004d; /* pico-8 red */
}
canvas#canvas { width: 384px; height: 384px; }
.pico8_el {
float:left;
width:92px;
display:inline-block;
margin: 1px;
padding: 4px;
text-align: center;
color:#fff;
background-color:#777;
font-family : verdana;
font-size: 9pt;
cursor: pointer;
cursor: hand;
}
.pico8_el a{
text-decoration: none;
color:#fff;
}
.pico8_el:hover{
background-color:#aaa;
}
.pico8_el:link{
background-color:#aaa;
}
canvas{
image-rendering: optimizeSpeed;
image-rendering: -moz-crisp-edges;
image-rendering: -webkit-optimize-contrast;
image-rendering: optimize-contrast;
image-rendering: pixelated;
-ms-interpolation-mode: nearest-neighbor;
border: 0px
}
-->
</STYLE>
</head>
<body bgcolor=#303030>
<br><br><br>
<center><div style="width:512px;">
<h1>PICO-8 GPIO Listener</h1>
<canvas class="emscripten" id="canvas" oncontextmenu="event.preventDefault()"></canvas>
<script type="text/javascript">
var canvas = document.getElementById("canvas");
canvas.width = window.innerWidth;
canvas.height = window.innerHeight;
// show Emscripten environment where the canvas is
// arguments are passed to PICO-8
var Module = {};
Module.canvas = canvas;
/*
// When pico8_buttons is defined, PICO-8 takes each int to be a live bitfield
// representing the state of each player's buttons
var pico8_buttons = [0, 0, 0, 0, 0, 0, 0, 0]; // max 8 players
pico8_buttons[0] = 2 | 16; // example: player 0, RIGHT and Z held down
// when pico8_gpio is defined, reading and writing to gpio pins will
// read and write to these values
var pico8_gpio = new Array(128);
*/
</script>
<script async type="text/javascript" src="index.js"></script>
<script>
// key blocker. prevent cursor keys from scrolling page while playing cart.
function onKeyDown_blocker(event) {
event = event || window.event;
var o = document.activeElement;
if (!o || o == document.body || o.tagName == "canvas")
{
if ([32, 37, 38, 39, 40].indexOf(event.keyCode) > -1)
{
if (event.preventDefault) event.preventDefault();
}
}
}
document.addEventListener('keydown', onKeyDown_blocker, false);
</script>
<br>
<div class=pico8_el onclick="Module.pico8Reset();">
<img src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABgAAAAYCAYAAADgdz34AAAAaklEQVR4Ae2dOwoAMQhE15A+rfc/3bZ7AlMnQfywCkKsfcgMM9ZP+QHtIn0vLeBAFduiFdQ/0DmvtR5LXJ6CPSXe2ZXcFNlTxFbemKrbZPs35XogeS9xeQr+anT6LzoOwEDwZJ7jwhXUnwkTTiDQ2Ja34AAAABB0RVh0TG9kZVBORwAyMDExMDIyMeNZtsEAAAAASUVORK5CYII=" alt="Reset" width=12 height= 12/>
Reset</div>
<div class=pico8_el onclick="Module.pico8TogglePaused();">
<img src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABgAAAAYCAYAAADgdz34AAAAPUlEQVR4Ae3doQ0AIAxEUWABLPtPh2WCq26DwFSU/JPNT166QSu/Hg86W9dwLte+diP7AwAAAAAAgD+A+jM2ZAgo84I0PgAAABB0RVh0TG9kZVBORwAyMDExMDIyMeNZtsEAAAAASUVORK5CYII=" alt="Pause" width=12 height=12/>
Pause</div>
<div class=pico8_el onclick="Module.requestFullScreen(true, false);">
<img src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABgAAAAYCAYAAADgdz34AAAAaklEQVR4Ae2dsQ1AIQhExfze1v2ns3UCrfgFhmgUUAoGgHscp21wX9BqaZoDojbB96OkDJKNcTN2BHTyYNYmoT2BlPL7BKgcPfHjAVXKKadkHOn9K1r16N0czN6a95N8mnA7Aq2fTZ3Af3UKmCSMazL8HwAAABB0RVh0TG9kZVBORwAyMDExMDIyMeNZtsEAAAAASUVORK5CYII=" alt="Fullscreen" width=12 height=12/>
Fullscreen</div>
<div class=pico8_el onclick="Module.pico8ToggleSound();">
<img src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABgAAAAYCAYAAADgdz34AAAAXklEQVR4Ae2doQ4AIQxD4YLH8v9fh+ULhjpxxSwLg2uyapr1JRu1iV5Z+1BGl4+xNpX38SYo2uRvYiT5LwEmt+ocgXVLrhPEgBiw8Q5w7/kueSkK+D2tJO4E/I3GrwkqQCBabEj/4QAAABB0RVh0TG9kZVBORwAyMDExMDIyMeNZtsEAAAAASUVORK5CYII=" alt="Toggle Sound" width=12 height=12/>
Sound</div>
<div class=pico8_el ><a target="_new" href="http://www.lexaloffle.com/bbs/?cat=7&sub=2">
<img src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABgAAAAYCAYAAADgdz34AAAAlElEQVR4Ae2dMQ5FQBCGh6jcwAkkateg3DiAa+iQUGqVKi95FQfAJRQOoHeBUf8JyQqKjZ1uMzuz2e/LTE3KhyF7kSlgLOykas23f6D+A9Yp84aAOYU15pcJnfji0Il2ID8HzC4y38ZrnfIBGxeRoR3c3EWrACdsV5BOsx7OSRnrOXh4F5HzA6bevwUn8wlz7eCDsQM99B3ks0s/4QAAABB0RVh0TG9kZVBORwAyMDExMDIyMeNZtsEAAAAASUVORK5CYII=" alt="More Carts" width=12 height=12/>
Carts</a></div>
<br>
<p>Recently changed values are highlighted in <span style="color:#ff004d">red</span></p>
<div class="gpio_values">
<div class="0">0</div>
<div class="1">0</div>
<div class="2">0</div>
<div class="3">0</div>
<div class="4">0</div>
<div class="5">0</div>
<div class="6">0</div>
<div class="7">0</div>
</div>
</div></center>
<br><br>
<script src="pico8-gpio-listener.js"></script>
<script>
(function() {
var gpio_divs = document.querySelectorAll('.gpio_values div');
var gpio = getP8Gpio();
gpio.subscribe(function(newIndices) {
console.log(newIndices)
for (var i = 0; i < 8; i++) {
var div = gpio_divs[i];
div.innerText = gpio[i];
if (newIndices.indexOf(i) === -1) {
div.classList.remove('new');
} else {
div.classList.add('new');
}
}
});
})();
</script>
</body></html>