Nitro-V3/src/components/avatar-effects/AvatarEffectPreviewView.tsx

import { GetRoomEngine, RoomPreviewer } from '@nitrots/nitro-renderer';
import { CSSProperties, FC, useEffect, useState } from 'react';
import { LayoutRoomPreviewerView } from '../../common';

interface AvatarEffectPreviewViewProps
{
    figure: string;
    gender: string;
    direction: number;
    effect: number;
    height?: number;
    zoom?: number;
}

export const AvatarEffectPreviewView: FC<AvatarEffectPreviewViewProps> = props =>
{
    const { figure = '', gender = 'M', direction = 4, effect = 0, height = 280, zoom = 1 } = props;
    const [ roomPreviewer, setRoomPreviewer ] = useState<RoomPreviewer>(null);

    const renderHeight = Math.floor(height / zoom);

    useEffect(() =>
    {
        const previewer = new RoomPreviewer(GetRoomEngine(), ++RoomPreviewer.PREVIEW_COUNTER);
        setRoomPreviewer(previewer);

        return () =>
        {
            previewer.dispose();
            setRoomPreviewer(null);
        };
    }, []);

    useEffect(() =>
    {
        if(!roomPreviewer || !figure) return;

        roomPreviewer.addAvatarIntoRoom(figure, effect);
        roomPreviewer.updateObjectUserFigure(figure, gender);
    }, [ roomPreviewer, figure, gender, effect ]);

    useEffect(() =>
    {
        if(!roomPreviewer) return;
        roomPreviewer.updateAvatarDirection(direction, direction);
    }, [ roomPreviewer, direction ]);

    if(!roomPreviewer) return null;

    if(zoom === 1)
    {
        return <LayoutRoomPreviewerView roomPreviewer={ roomPreviewer } height={ height } />;
    }

    const outerStyle: CSSProperties = {
        position: 'absolute',
        inset: 0,
        overflow: 'hidden'
    };

    const innerStyle: CSSProperties = {
        width: `${ 100 / zoom }%`,
        height: `${ 100 / zoom }%`,
        transform: `scale(${ zoom })`,
        transformOrigin: 'top left',
        imageRendering: 'pixelated'
    };

    return (
        <div style={ outerStyle }>
            <div style={ innerStyle }>
                <LayoutRoomPreviewerView roomPreviewer={ roomPreviewer } height={ renderHeight } />
            </div>
        </div>
    );
};