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<!doctype html>
<title>LDJam 57</title>
<meta charset="utf-8"/>
<meta name="viewport" content="width=device-width">
<style>
html, body {
background: #222222;
font-family: sans-serif;
height: 100%;
margin: 0;
overflow: hidden;
text-align: center;
width: 100%;
}
h1 {
color: white;
margin: 0;
}
button {
font-size: 150%;
height: 8%;
margin: 0.3em;
width: 25%;
}
</style>
<canvas></canvas>
<script>
// Mirror these in src/all.c
const INPUT_NONE = 0;
const INPUT_CLICK = 1;
const INPUT_RCLICK = 2;
const INPUT_PAUSE_PLAY = 3;
const INPUT_MOVE = 4;
const INPUT_RESTART = 5;
const WASM =
#include "../build/main.wasm.b64"
const MUSIC =
#include "../build/music.mp3.b64"
const IMAGES = [
#include "../build/continue.png.b64"
,
#include "../build/exit.png.b64"
,
#include "../build/pause.png.b64"
,
#include "../build/play.png.b64"
,
#include "../build/restart.png.b64"
,
#include "../build/nelson.png.b64"
,
#include "../build/nelson_left.png.b64"
,
#include "../build/nelson_up.png.b64"
,
#include "../build/nelson_right.png.b64"
,
#include "../build/nelson_down.png.b64"
,
];
async function main() {
let bytes = Uint8Array.from(atob(WASM), function(c) {
return c.charCodeAt(0);
});
let module = await WebAssembly.compile(bytes);
let wasm = await WebAssembly.instantiate(module);
let exports = wasm.exports;
let html = document.querySelector("html");
let canvas = document.querySelector("canvas");
let ctx = canvas.getContext("2d");
let memory = exports.memory;
let mousex = 0;
let mousey = 0;
const audio = new Audio();
audio.src = MUSIC;
audio.volume = 0.2;
audio.loop = true;
let musicPlaying = false;
let images = [null];
for (let i = 0; i < IMAGES.length; i++) {
const image = new Image();
image.src = IMAGES[i];
images.push(image);
}
const start = Date.now();
function now() {
return Date.now() - start;
}
function min(a, b) {
return b<a ? b : a;
}
function render() {
if (64 + html.clientHeight * (20 / 16) > html.clientWidth) {
canvas.width = html.clientWidth;
canvas.height = (html.clientWidth - 64) * (16 / 20);
} else {
canvas.width = 64 + html.clientHeight * (20 / 16);
canvas.height = html.clientHeight;
}
let width = canvas.width;
let height = canvas.height;
let ptr = exports.game_render(width, height, mousex, mousey);
let dl = new Int32Array(memory.buffer, ptr);
let len = dl[0];
let ops = dl.subarray(1);
ctx.fillStyle = "#000000";
ctx.fillRect(0, 0, width, height);
for (let i = 0; i < len; i++) {
let op = ops.subarray(7*i, 7*i+7);
const color = new Uint8Array(new Uint32Array(op.subarray(4, 6)).buffer);
ctx.fillStyle = `#${color[0].toString(16).padStart(2, "0")}${color[1].toString(16).padStart(2, "0")}${color[2].toString(16).padStart(2, "0")}`;
ctx.globalAlpha = color[3] / 255;
ctx.fillRect(op[0], op[1], op[2], op[3]);
ctx.strokeStyle = `#${color[4].toString(16).padStart(2, "0")}${color[5].toString(16).padStart(2, "0")}${color[6].toString(16).padStart(2, "0")}`;
ctx.globalAlpha = color[7] / 255;
ctx.strokeRect(op[0], op[1], op[2], op[3]);
const image = new Uint8Array(new Uint32Array(op.subarray(6, 7)).buffer);
if (image[0] !== 0) {
console.log(image);
ctx.globalAlpha = image[1] / 255;
ctx.drawImage(images[image[0]], op[0], op[1], op[2], op[3]);
}
}
}
function onresize() { /*html.style.maxWidth = `${max_width()}px`; */}
window.addEventListener("resize", onresize);
onresize();
canvas.addEventListener("mousemove", function(e) {
const rect = e.target.getBoundingClientRect();
mousex = e.clientX - rect.left;
mousey = e.clientY - rect.top;
exports.game_update(INPUT_MOVE, mousex, mousey, now());
});
canvas.addEventListener("mousedown", function(e) {
const rect = e.target.getBoundingClientRect();
mousex = e.clientX - rect.left;
mousey = e.clientY - rect.top;
if (e.button == 0) {
exports.game_update(INPUT_CLICK, mousex, mousey, now());
} else if (e.button == 2) {
e.preventDefault();
exports.game_update(INPUT_RCLICK, mousex, mousey, now());
}
if (!musicPlaying) {
musicPlaying = true;
audio.play();
}
});
canvas.addEventListener("contextmenu", function (e) {
e.preventDefault();
});
document.addEventListener("keydown", function (e) {
if (e.key === " ") {
exports.game_update(INPUT_PAUSE_PLAY, mousex, mousey, now());
} else if (e.key == "r") {
exports.game_update(INPUT_RESTART, mousex, mousey, now());
}
});
function animate() {
// TODO: stop requesting frames when state is static
requestAnimationFrame(animate);
exports.game_update(INPUT_NONE, mousex, mousey, now());
render();
}
requestAnimationFrame(animate);
exports.game_init();
}
main()
</script>
|
