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add file input to load cart from filesystem

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This commit is contained in:
Dennis Ranke
2021-11-02 23:27:46 +01:00
parent a39226b908
commit b34ff18a60
4 changed files with 102 additions and 53 deletions
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154
web/src/main.js
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@@ -8,6 +8,14 @@ async function loadWasm(url, imports) {
return new WebAssembly.Instance(compiled_module, imports);
}
function setMessage(size, error) {
let html = size ? `${size} bytes` : 'Insert cart';
if(error) {
html += ` - <span class="error">${error.replaceAll('<', '&lt;')}</span>`
}
document.getElementById('message').innerHTML = html;
}
let cancelFunction;
async function runModule(data) {
@@ -16,69 +24,99 @@ async function runModule(data) {
cancelFunction = null;
}
document.getElementById('message').innerText = '' + data.byteLength + ' bytes';
let cartridgeSize = data.byteLength;
let loaderImport = {
uw8: {
ram: new WebAssembly.Memory({ initial: 8 })
}
};
let loadMem = loaderImport.uw8.ram.buffer;
let loader = await loadWasm(loaderUrl, loaderImport);
new Uint8Array(loadMem).set(new Uint8Array(data));
let baseModule = await (await fetch(baseUrl)).arrayBuffer();
new Uint8Array(loadMem).set(new Uint8Array(baseModule), data.byteLength);
let destOffset = data.byteLength + baseModule.byteLength;
let endOffset = loader.exports.load_uw8(0, data.byteLength, data.byteLength, destOffset);
data = new ArrayBuffer(endOffset - destOffset);
new Uint8Array(data).set(new Uint8Array(loadMem).slice(destOffset, endOffset));
let importObject = {
uw8: {
ram: new WebAssembly.Memory({ initial: 8, maximum: 8 }),
time: new WebAssembly.Global({value: 'i32', mutable: true}, 0),
}
};
let instance = new WebAssembly.Instance(await WebAssembly.compile(data), importObject);
let canvasCtx = document.getElementById('screen').getContext('2d');
let imageData = canvasCtx.createImageData(320, 256);
let buffer = imageData.data;
for(let i = 0; i < 320*256; ++i) {
buffer[i * 4 + 3] = 255;
setMessage(cartridgeSize);
if(cartridgeSize == 0) {
return;
}
let startTime = Date.now();
let dataU8Array = new Uint8Array(data);
let keepRunning = true;
cancelFunction = () => keepRunning = false;
function mainloop() {
if(!keepRunning) {
return;
let newURL = window.location.pathname;
if(cartridgeSize <= 1024) {
let dataString = '';
for(let byte of dataU8Array) {
dataString += String.fromCharCode(byte);
}
importObject.uw8.time.value = Date.now() - startTime;
newURL += '#' + btoa(dataString);
}
if(newURL != window.location.href) {
history.replaceState(null, null, newURL);
history.pushState(null, null, newURL);
}
instance.exports.tic();
try {
let framebuffer = new Uint8Array(importObject.uw8.ram.buffer.slice(120, 120 + 320*256));
let loaderImport = {
uw8: {
ram: new WebAssembly.Memory({ initial: 8 })
}
};
let loadMem = loaderImport.uw8.ram.buffer;
let loader = await loadWasm(loaderUrl, loaderImport);
let baseModule = await (await fetch(baseUrl)).arrayBuffer();
if(dataU8Array[0] != 0) {
new Uint8Array(loadMem).set(dataU8Array);
new Uint8Array(loadMem).set(new Uint8Array(baseModule), data.byteLength);
let destOffset = data.byteLength + baseModule.byteLength;
let endOffset = loader.exports.load_uw8(0, data.byteLength, data.byteLength, destOffset);
data = new ArrayBuffer(endOffset - destOffset);
new Uint8Array(data).set(new Uint8Array(loadMem).slice(destOffset, endOffset));
}
let importObject = {
uw8: {
ram: new WebAssembly.Memory({ initial: 8, maximum: 8 }),
}
};
let instance = new WebAssembly.Instance(await WebAssembly.compile(data), importObject);
let canvasCtx = document.getElementById('screen').getContext('2d');
let imageData = canvasCtx.createImageData(320, 256);
let buffer = imageData.data;
for(let i = 0; i < 320*256; ++i) {
buffer[i * 4] = framebuffer[i];
buffer[i * 4 + 1] = framebuffer[i];
buffer[i * 4 + 2] = framebuffer[i];
buffer[i * 4 + 3] = 255;
}
canvasCtx.putImageData(imageData, 0, 0);
let startTime = Date.now();
let keepRunning = true;
cancelFunction = () => keepRunning = false;
window.requestAnimationFrame(mainloop);
function mainloop() {
if(!keepRunning) {
return;
}
try {
instance.exports.tic(Date.now() - startTime);
let framebuffer = new Uint8Array(importObject.uw8.ram.buffer.slice(120, 120 + 320*256));
for(let i = 0; i < 320*256; ++i) {
buffer[i * 4] = framebuffer[i];
buffer[i * 4 + 1] = framebuffer[i];
buffer[i * 4 + 2] = framebuffer[i];
}
canvasCtx.putImageData(imageData, 0, 0);
window.requestAnimationFrame(mainloop);
} catch(err) {
setMessage(cartridgeSize, err.toString());
}
}
mainloop();
} catch(err) {
setMessage(cartridgeSize, err.toString());
}
mainloop();
}
async function runModuleFromURL(url) {
@@ -86,8 +124,18 @@ async function runModuleFromURL(url) {
}
function runModuleFromHash() {
runModuleFromURL('data:;base64,' + window.location.hash.slice(1));
let base64Data = window.location.hash.slice(1);
if(base64Data.length > 0) {
runModuleFromURL('data:;base64,' + base64Data);
}
}
let fileInput = document.getElementById('cart');
fileInput.onchange = () => {
if(fileInput.files.length > 0) {
runModuleFromURL(URL.createObjectURL(fileInput.files[0]));
}
};
window.onhashchange = runModuleFromHash;
runModuleFromHash();