286 lines
11 KiB
TypeScript
286 lines
11 KiB
TypeScript
import * as React from 'react';
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import CenterElement from '/components/center-element';
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import FormSelectFiles from '/components/form-select-files';
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import CanvasGBAEmulator from '/components/canvas-gba-emulator';
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import OverlayControls from '/components/overlay-controls';
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import OverlayMenu from '/components/overlay-menu';
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import CloseButton from '/components/close-button';
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import Endian from '/endian';
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import {MIN_WIDTH, MIN_HEIGHT, PACKET_ID_HELLO, PACKET_ID_SEND_FRAME} from '/constants';
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type setBooleanCallback = (c: boolean) => boolean;
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export interface handleClickStartEmulationButtonObjectArgs {
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e: React.MouseEvent<HTMLInputElement>;
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inputRom: HTMLInputElement | null;
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inputSaveState: HTMLInputElement | null;
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canvas: HTMLCanvasElement | null;
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printingFrame: boolean;
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setPrintingFrame: (c: setBooleanCallback) => void;
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setEmulationStarted: (c: boolean) => void,
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setHiddenMenu: (c: boolean) => void;
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setHiddenFormSelectFiles: (c: boolean) => void;
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};
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function handleClickStartEmulationButton({e, inputRom, inputSaveState, canvas, printingFrame,
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setPrintingFrame, setEmulationStarted, setHiddenMenu,
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setHiddenFormSelectFiles}: handleClickStartEmulationButtonObjectArgs) {
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e.preventDefault();
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if (canvas == null) {
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alert('Canvas does not exists?');
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return;
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}
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const ctx = canvas.getContext('2d')
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if (ctx == null) {
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alert('Unable to create canvas context, doing nothing');
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return;
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}
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if (inputRom == null || inputSaveState == null || inputRom.files == null || inputSaveState.files == null) {
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alert('Unable to read the files ');
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return;
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}
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if (inputRom.files.length == 0) {
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alert('There is no rom still');
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return;
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}
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if (inputSaveState.files.length == 0) {
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alert('There is no savestate still');
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return;
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}
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const rom_file = inputRom.files[0];
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const savestate_file = inputSaveState.files[0];
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rom_file.arrayBuffer().then((rom_buffer) => {
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savestate_file.arrayBuffer().then((savestate_buffer) => {
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const rom_array = new Uint8Array(rom_buffer);
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const savestate_array = new Uint8Array(savestate_buffer);
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const websocket = new WebSocket(`ws://${window.location.host}/ws`);
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websocket.binaryType = 'arraybuffer';
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websocket.onclose = (message) => {
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setEmulationStarted(false);
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console.log('Closing websocket.');
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}
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websocket.onopen = () => {
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console.log('Opened websocket.');
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setEmulationStarted(true);
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sendHello(websocket, rom_array, savestate_array);
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setHiddenMenu(true);
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setHiddenFormSelectFiles(true);
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};
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setPrintingFrame(c => false);
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websocket.addEventListener('message', (event) => {
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onWebSocketPacket(event, canvas, ctx, printingFrame, setPrintingFrame)
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});
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});
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});
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}
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function concatU8Array(array1: Uint8Array, array2: Uint8Array) {
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const final_array = new Uint8Array(array1.length + array2.length);
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final_array.set(array1);
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final_array.set(array2, array1.length);
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return final_array;
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}
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function sendPacket(websocket: WebSocket, id: bigint, raw_data: Uint8Array) {
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const packet_u8 = concatU8Array(
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concatU8Array(Endian.u64ToByteArrayBigEndian(id), Endian.u64ToByteArrayBigEndian(BigInt(raw_data.length))),
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raw_data
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);
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const packet_buffer = packet_u8.buffer;
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console.log('Sending packet');
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websocket.send(packet_buffer);
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}
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function sendHello(websocket: WebSocket, rom_array: Uint8Array, savestate_array: Uint8Array) {
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console.log('Sending hello.');
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const length_rom = BigInt(rom_array.length);
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const length_savestate = BigInt(savestate_array.length);
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const raw_data =
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concatU8Array(
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concatU8Array(
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concatU8Array(Endian.u64ToByteArrayBigEndian(length_rom), rom_array),
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Endian.u64ToByteArrayBigEndian(length_savestate)
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),
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savestate_array
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);
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sendPacket(websocket, PACKET_ID_HELLO, raw_data);
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}
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function onWebSocketPacket(event: MessageEvent, canvas: HTMLCanvasElement, ctx: CanvasRenderingContext2D, printingFrame: boolean, setPrintingFrame: (c: setBooleanCallback) => void) {
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const buffer = event.data;
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let packet_u8: Uint8Array | null = new Uint8Array(buffer);
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const id = Endian.byteArrayToU64BigEndian(packet_u8.slice(0, 8));
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packet_u8 = packet_u8.slice(8, packet_u8.length);
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const size = Endian.byteArrayToU64BigEndian(packet_u8.slice(0, 8));
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const raw_data = packet_u8.slice(8, packet_u8.length);
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packet_u8 = null;
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switch (id) {
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case PACKET_ID_SEND_FRAME:
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handleSendFrame(raw_data, canvas, ctx, printingFrame, setPrintingFrame);
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break;
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default:
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console.log(`Received unknown packet ${id}`);
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}
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}
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function handleSendFrame(raw_data: Uint8Array, canvas: HTMLCanvasElement, ctx: CanvasRenderingContext2D, printingFrame: boolean, setPrintingFrame: (c: setBooleanCallback) => void) {
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if (printingFrame) {
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return;
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}
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setPrintingFrame(c => true);
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let data: Uint8Array | null = raw_data;
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const stride = Endian.byteArrayToU32BigEndian(data.slice(0, 4));
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data = data.slice(4, data.length);
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const output_buffer_size = Endian.byteArrayToU64BigEndian(data.slice(0, 8));
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data = data.slice(8, data.length);
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const img_data = ctx.createImageData(MIN_WIDTH, MIN_HEIGHT);
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const img_data_u8 = new Uint8Array(img_data.data.buffer);
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for (let i = 0; i<data.length; i++) {
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if (i % 4 == 3) {
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img_data_u8[i] = 255;
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continue;
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}
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img_data_u8[i] = data[i];
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}
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data = null;
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createImageBitmap(img_data).then((bitmap) => drawBitmap(bitmap, canvas, ctx, printingFrame));
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}
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function drawBitmap(bitmap: ImageBitmap, canvas: HTMLCanvasElement, ctx: CanvasRenderingContext2D, printingFrame: boolean) {
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ctx.drawImage(bitmap, 0, 0, canvas.width, canvas.height);
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printingFrame = false;
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}
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export default function Page() {
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const screenDimensions = useScreenDimensions();
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const emulatorDimensions = calculateSizeEmulator(screenDimensions);
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const canvasRef = React.useRef<HTMLCanvasElement>(null);
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function resizeCanvas() {
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const canvas = canvasRef.current;
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if (canvas == null) {
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return;
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}
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if (emulatorDimensions.width === undefined || emulatorDimensions.height === undefined) {
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return;
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}
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canvas.width = emulatorDimensions.width;
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canvas.height = emulatorDimensions.height;
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const ctx = canvas.getContext('2d')
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if (ctx == null) {
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return;
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}
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fillBlack(canvas, ctx);
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};
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const [hiddenFormSelectFiles, setHiddenFormSelectFiles] = React.useState<boolean>(true);
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const [printingFrame, setPrintingFrame] = React.useState<boolean>(false);
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React.useEffect(resizeCanvas, [emulatorDimensions]);
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const refInputRom = React.useRef<HTMLInputElement | null>(null);
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const refInputSaveState = React.useRef<HTMLInputElement | null>(null);
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const [emulationStarted, setEmulationStarted] = React.useState<boolean>(false);
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const [hiddenMenu, setHiddenMenu] = React.useState<boolean>(true);
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const onStartEmulation = (e: React.MouseEvent<HTMLInputElement>) => {
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handleClickStartEmulationButton({
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e: e,
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setEmulationStarted: setEmulationStarted,
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inputRom: refInputRom.current,
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inputSaveState: refInputSaveState.current,
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canvas: canvasRef.current,
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setPrintingFrame: setPrintingFrame,
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printingFrame: printingFrame,
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setHiddenMenu: setHiddenMenu,
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setHiddenFormSelectFiles: setHiddenFormSelectFiles,
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});
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};
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let firstMenuElement = React.useRef<HTMLAnchorElement>(null);
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return (
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<div>
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<OverlayControls firstMenuElement={firstMenuElement} setHiddenMenu={setHiddenMenu}/>
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<OverlayMenu hiddenMenu={hiddenMenu} setHiddenMenu={setHiddenMenu} emulationStarted={emulationStarted} setHiddenFormSelectFiles={setHiddenFormSelectFiles}/>
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<div style={{display: hiddenFormSelectFiles?'none':''}} className="overlay-menu-select-files overlay-menu-div">
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<div className="overlay-menu-div-header">
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<CloseButton onClick={() => setHiddenFormSelectFiles(true)}/>
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</div>
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<div className="overlay-menu">
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<CenterElement>
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<FormSelectFiles refInputRom={refInputRom}
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refInputSaveState={refInputSaveState}
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onStartEmulation={(e: React.MouseEvent<HTMLInputElement>) => {
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onStartEmulation(e)
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}}/>
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</CenterElement>
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</div>
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</div>
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<div>
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<CenterElement full={true}>
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<CanvasGBAEmulator canvasRef={canvasRef}/>
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</CenterElement>
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</div>
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</div>
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);
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}
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function getScreenDimensions() {
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return {
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width: document.body.clientWidth,
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height: document.body.clientHeight
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};
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}
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function useScreenDimensions() {
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const [screenDimensions, setScreenDimensions] = React.useState<EmulatorDimensions>(getScreenDimensions());
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React.useEffect(() => {
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function onResize() {
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setScreenDimensions(getScreenDimensions());
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}
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window.addEventListener("resize", onResize);
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return () => {
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window.removeEventListener("resize", onResize);
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}
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}, []);
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return screenDimensions;
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}
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function fillBlack(canvas: HTMLCanvasElement, ctx: CanvasRenderingContext2D) {
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ctx.beginPath();
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ctx.rect(0, 0, canvas.width, canvas.height);
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ctx.fillStyle = '#0E0E10';
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ctx.fill();
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}
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export interface EmulatorDimensions {
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width?: number;
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height?: number;
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};
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function calculateSizeEmulator(screenDimensions: EmulatorDimensions): EmulatorDimensions {
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if (screenDimensions.width === undefined || screenDimensions.height === undefined) {
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console.error(screenDimensions, 'screenDimensions has undefined fields');
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return {};
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}
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const width = screenDimensions.width;
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const height = screenDimensions.height;
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const emulatorDimensions: EmulatorDimensions = {};
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if (width < MIN_WIDTH || height < MIN_HEIGHT) {
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return {
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width: MIN_WIDTH,
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height: MIN_HEIGHT,
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};
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}
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const ratioWidth = width / MIN_WIDTH;
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const ratioHeight = height / MIN_HEIGHT;
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if (ratioWidth < ratioHeight) {
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emulatorDimensions.width = MIN_WIDTH * ratioWidth;
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emulatorDimensions.height = MIN_HEIGHT * ratioWidth;
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} else {
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emulatorDimensions.height = MIN_HEIGHT * ratioHeight;
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emulatorDimensions.width = MIN_WIDTH * ratioHeight;
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}
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return emulatorDimensions;
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}
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