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@EngstromJimmy
EngstromJimmy committed Oct 19, 2024
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1 change: 1 addition & 0 deletions .gitattributes
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175 changes: 175 additions & 0 deletions 404.html
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<!DOCTYPE html>
<html>

<head>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no" />
<title>ZX Spectrum emulator running on Blazor</title>
<base href="/ZXSpectrum/"/>
<link href="css/bootstrap/bootstrap.min.css" rel="stylesheet" />
<link href="css/app.css" rel="stylesheet" />
<link href="ZXBox.Blazor.styles.css" rel="stylesheet" />
</head>

<body>
<script>
//Sound
var audiobuffer = [];
var nextStartTime = 0;
var lastcall = performance.now()
var audiocontext = new (window.AudioContext || window.webkitAudioContext)();
var gainNode = audiocontext.createGain();
gainNode.gain.value = 0.01;

function addAudioBuffer
(dataPtr) {
var buffersize = 960;
var myArrayBuffer = audiocontext.createBuffer(1, buffersize, audiocontext.sampleRate);
var nowBuffering = myArrayBuffer.getChannelData(0);

for (var d = 0; d < buffersize; d++) {
nowBuffering[d] = Module.HEAPU8[dataPtr + d];
//console.log(nowBuffering[d]);
}
let source = audiocontext.createBufferSource();
source.buffer = myArrayBuffer;

gainNode.connect(audiocontext.destination);
source.connect(gainNode);
if (nextStartTime == 0) nextStartTime = audiocontext.currentTime + (myArrayBuffer.length / myArrayBuffer.sampleRate);

source.start(nextStartTime);
nextStartTime += myArrayBuffer.length / myArrayBuffer.sampleRate;
gainNode.gain.value = 0.0005;

//console.log(dataPtr);
}



//function play() {
// console.log("Playing sound");
// soundon = true;
// //end of stream has been reached
// if (audiobuffer.length === 0)
// {
// console.log("To slow");
// soundon = false;
// return;
// }
// let source = audiocontext.createBufferSource();
// //get the latest buffer that should play next
// source.buffer = audiobuffer.shift();
// source.connect(audiocontext.destination);

// //add this function as a callback to play next buffer
// //when current buffer has reached its end
// source.onended = play;
// source.start();
//}



var pressedKeys = [];

function GetKey(keyCode) {
var key = String.fromCharCode(keyCode);
//console.log(keyCode);
switch (keyCode) {
case 32:
key = "space";
break;
case 8:
key = "backspace";
break;
case 16:
key = "shift";
break;
case 17:
key = "control";
break;
case 9:
key = "tab";
break;
case 18:
key = "alt";
break;
case 38:
key = "arrowup";
break;
case 40:
key = "arrowdown";
break;
case 37:
key = "arrowleft";
break;
case 39:
key = "arrowright";
break;
case 13:
key = "enter";
break;

}
return key;
}

window.onkeyup = function (e) {
var key = GetKey(e.keyCode);
const index = pressedKeys.indexOf(key);
if (index > -1) {
pressedKeys.splice(index, 1);
}
event.preventDefault();
//console.log(pressedKeys);
}
window.onkeydown = function (e) {
var key = GetKey(e.keyCode);
const index = pressedKeys.indexOf(key);
if (index == -1) {
pressedKeys.push(key);
}
event.preventDefault();
}

window.getKeyStatus = function () {
return pressedKeys;
}

var canvas;
var context;
var imageData;
window.InitCanvas = function InitCanvas() {

canvas = document.getElementById('emulatorCanvas');
context = canvas.getContext('2d');
context.mozImageSmoothingEnabled = false;
context.webkitImageSmoothingEnabled = false;
context.msImageSmoothingEnabled = false;
context.imageSmoothingEnabled = false;
imageData = context.createImageData(256 + 20 + 20, 192 + 20 + 20);
return true;
}

window.PaintCanvas = function PaintCanvas(dataPtr) {
imageData.data.set(Uint8ClampedArray.from(Module.HEAPU8.subarray(dataPtr, dataPtr + imageData.data.length)));
context.putImageData(imageData, 0, 0);
context.drawImage(canvas, 0, 0, canvas.width, canvas.height);
return true;
}
</script>
<div id="app">
<div style="height:100vh;text-align:center;padding-top:200px;">Loading...</div>
</div>

<div id="blazor-error-ui">
An unhandled error has occurred.
<a href="" class="reload">Reload</a>
<a class="dismiss">🗙</a>
</div>
<script src="JavaScript.js"></script>
<script src="_framework/blazor.webassembly.js"></script>

</body>

</html>
203 changes: 203 additions & 0 deletions JavaScript.js
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(function () {
window.BlazorInputFile = {
init: function init(elem, componentInstance) {
elem._blazorInputFileNextFileId = 0;

elem.addEventListener('change', function handleInputFileChange(event) {
// Reduce to purely serializable data, plus build an index by ID
elem._blazorFilesById = {};
var fileList = Array.prototype.map.call(elem.files, function (file) {
var result = {
id: ++elem._blazorInputFileNextFileId,
lastModified: new Date(file.lastModified).toISOString(),
name: file.name,
size: file.size,
type: file.type,
relativePath: file.webkitRelativePath
};
elem._blazorFilesById[result.id] = result;

// Attach the blob data itself as a non-enumerable property so it doesn't appear in the JSON
Object.defineProperty(result, 'blob', { value: file });

return result;
});

componentInstance.invokeMethodAsync('NotifyChange', fileList).then(function () {
//reset file value ,otherwise, the same filename will not be trigger change event again
elem.value = '';
}, function (err) {
//reset file value ,otherwise, the same filename will not be trigger change event again
elem.value = '';
throw new Error(err);
});
});
},

toImageFile(elem, fileId, format, maxWidth, maxHeight) {
var originalFile = getFileById(elem, fileId);

return new Promise(function (resolve) {
var originalFileImage = new Image();
originalFileImage.onload = function () { resolve(originalFileImage); };
originalFileImage.src = URL.createObjectURL(originalFile.blob);
}).then(function (loadedImage) {
return new Promise(function (resolve) {
var desiredWidthRatio = Math.min(1, maxWidth / loadedImage.width);
var desiredHeightRatio = Math.min(1, maxHeight / loadedImage.height);
var chosenSizeRatio = Math.min(desiredWidthRatio, desiredHeightRatio);

var canvas = document.createElement('canvas');
canvas.width = Math.round(loadedImage.width * chosenSizeRatio);
canvas.height = Math.round(loadedImage.height * chosenSizeRatio);
canvas.getContext('2d').drawImage(loadedImage, 0, 0, canvas.width, canvas.height);
canvas.toBlob(resolve, format);
});
}).then(function (resizedImageBlob) {
var result = {
id: ++elem._blazorInputFileNextFileId,
lastModified: originalFile.lastModified,
name: originalFile.name, // Note: we're not changing the file extension
size: resizedImageBlob.size,
type: format,
relativePath: originalFile.relativePath
};

elem._blazorFilesById[result.id] = result;

// Attach the blob data itself as a non-enumerable property so it doesn't appear in the JSON
Object.defineProperty(result, 'blob', { value: resizedImageBlob });

return result;
});
},

readFileData: function readFileData(elem, fileId, startOffset, count) {
var readPromise = getArrayBufferFromFileAsync(elem, fileId);

return readPromise.then(function (arrayBuffer) {
var uint8Array = new Uint8Array(arrayBuffer, startOffset, count);
var base64 = uint8ToBase64(uint8Array);
return base64;
});
},

ensureArrayBufferReadyForSharedMemoryInterop: function ensureArrayBufferReadyForSharedMemoryInterop(elem, fileId) {
return getArrayBufferFromFileAsync(elem, fileId).then(function (arrayBuffer) {
getFileById(elem, fileId).arrayBuffer = arrayBuffer;
});
},

readFileDataSharedMemory: function readFileDataSharedMemory(readRequest) {
// This uses various unsupported internal APIs. Beware that if you also use them,
// your code could become broken by any update.
var inputFileElementReferenceId = Blazor.platform.readStringField(readRequest, 0);
var inputFileElement = document.querySelector('[_bl_' + inputFileElementReferenceId + ']');
var fileId = Blazor.platform.readInt32Field(readRequest, 4);
var sourceOffset = Blazor.platform.readUint64Field(readRequest, 8);
var destination = Blazor.platform.readInt32Field(readRequest, 16);
var destinationOffset = Blazor.platform.readInt32Field(readRequest, 20);
var maxBytes = Blazor.platform.readInt32Field(readRequest, 24);

var sourceArrayBuffer = getFileById(inputFileElement, fileId).arrayBuffer;
var bytesToRead = Math.min(maxBytes, sourceArrayBuffer.byteLength - sourceOffset);
var sourceUint8Array = new Uint8Array(sourceArrayBuffer, sourceOffset, bytesToRead);

var destinationUint8Array = Blazor.platform.toUint8Array(destination);
destinationUint8Array.set(sourceUint8Array, destinationOffset);

return bytesToRead;
}
};

function getFileById(elem, fileId) {
var file = elem._blazorFilesById[fileId];
if (!file) {
throw new Error('There is no file with ID ' + fileId + '. The file list may have changed');
}

return file;
}

function getArrayBufferFromFileAsync(elem, fileId) {
var file = getFileById(elem, fileId);

// On the first read, convert the FileReader into a Promise<ArrayBuffer>
if (!file.readPromise) {
file.readPromise = new Promise(function (resolve, reject) {
var reader = new FileReader();
reader.onload = function () { resolve(reader.result); };
reader.onerror = function (err) { reject(err); };
reader.readAsArrayBuffer(file.blob);
});
}

return file.readPromise;
}

var uint8ToBase64 = (function () {
// Code from https://github.com/beatgammit/base64-js/
// License: MIT
var lookup = [];

var code = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/';
for (var i = 0, len = code.length; i < len; ++i) {
lookup[i] = code[i];
}

function tripletToBase64(num) {
return lookup[num >> 18 & 0x3F] +
lookup[num >> 12 & 0x3F] +
lookup[num >> 6 & 0x3F] +
lookup[num & 0x3F];
}

function encodeChunk(uint8, start, end) {
var tmp;
var output = [];
for (var i = start; i < end; i += 3) {
tmp =
((uint8[i] << 16) & 0xFF0000) +
((uint8[i + 1] << 8) & 0xFF00) +
(uint8[i + 2] & 0xFF);
output.push(tripletToBase64(tmp));
}
return output.join('');
}

return function fromByteArray(uint8) {
var tmp;
var len = uint8.length;
var extraBytes = len % 3; // if we have 1 byte left, pad 2 bytes
var parts = [];
var maxChunkLength = 16383; // must be multiple of 3

// go through the array every three bytes, we'll deal with trailing stuff later
for (var i = 0, len2 = len - extraBytes; i < len2; i += maxChunkLength) {
parts.push(encodeChunk(
uint8, i, (i + maxChunkLength) > len2 ? len2 : (i + maxChunkLength)
));
}

// pad the end with zeros, but make sure to not forget the extra bytes
if (extraBytes === 1) {
tmp = uint8[len - 1];
parts.push(
lookup[tmp >> 2] +
lookup[(tmp << 4) & 0x3F] +
'=='
);
} else if (extraBytes === 2) {
tmp = (uint8[len - 2] << 8) + uint8[len - 1];
parts.push(
lookup[tmp >> 10] +
lookup[(tmp >> 4) & 0x3F] +
lookup[(tmp << 2) & 0x3F] +
'='
);
}

return parts.join('');
};
})();
})();
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