index.js

import { html, render } from '/web_modules/lit-html.js';
import '/components/entry.js';
let image_count = 0;
let player_state = true;
let options = {
    background: false,
    dither: true
}
let palette_limit = 2;
let canvasRendererEl;

function getCanvas() {
    if (!canvasRendererEl) canvasRendererEl = document.querySelector('canvas-renderer');
    return canvasRendererEl;
}

function quantize() {
    getCanvas().quantize();
}

function zoomOut() {
    getCanvas().zoomOut();
}

function zoomIn() {
    getCanvas().zoomIn();
}

function renderGIF() {
    getCanvas().renderGIF();
}

function renderWEBM() {
    getCanvas().renderWEBM();
}

function renderFrames() {
    getCanvas().renderFrames();
}

function saveFrame() {
    getCanvas().saveFrame();
}

function setFrame(frame) {
    getCanvas().setFrame(frame);
}

function openPalettes() {
    setTimeout(() => {
        document.querySelector('lospec-palette')?.toggle();
    }, 0)
}

function togglePlayerState() {
    player_state = !player_state;
    
    getCanvas().setPlayerState(player_state);
    
    drawApp();
}

function paletteLimit(value) {
    palette_limit += value;
    palette_limit = palette_limit >= 2 ? palette_limit : 2;
    getCanvas().setPaletteLimit(palette_limit);
    drawApp();
}

function checkDither(id) {
    return id == getCanvas().getDitheringId();
}

let ditherDebounce;
function changeDither(value) {
    getCanvas().selectDitheringMatrix(value);
    let palette = getCanvas().palette;
    if(palette) {
        getCanvas().setPalette(palette);
    }
    drawApp();
}

function getDitheringRatio() {
    return getCanvas().ditheringRatio;
}

function changeRatio(value) {
    getCanvas().changeRatio(value);
    window.clearTimeout(ditherDebounce);
    ditherDebounce = window.setTimeout(() => {
        let palette = getCanvas().palette;
        if(palette) {
            getCanvas().setPalette(palette);
        }
    }, 250);
    drawApp();
}

function drawApp() {
    render(html`
    <style>
    button {
        background: #2e2549;
        border-radius: 6px;
        border: none;   
        text-transform: uppercase;
        font-weight: bold;
        box-sizing: border-box;
        padding: 10px 18px;
        cursor: pointer;
        margin: 0 10px;
        letter-spacing: 2px;
        height: 46px;
        transition: all ease .2s;
        outline: none;
        user-select: none;
    }
    
    .fixed-buttons {
        position: fixed;
        display: flex;
        bottom: 2vh;
        padding: 40px;
        box-sizing: border-box;
        align-items: center;
        z-index: 1000;
    }
    
    .fixed-buttons-right {
        position: fixed;
        display: flex;
        bottom: 2vh;
        right: 2vh;
        padding: 0 30px 40px 30px;
        z-index: 10;
    }
    
    .fixed-buttons-left {
        position: fixed;
        display: flex;
        bottom: 2vh;
        left: 2vh;
        padding: 40px 30px;
    }
    
    .round {
        border-radius: 50%;
        padding: 20px;
        width: 54px;
        height: 54px;
        font-size: 42px;
        display: flex;
        align-items: center;
        justify-content: center;
    }
    
    .float-container {
        display: flex;
        align-items: center;
        justify-content: space-between;
    }
    
    .float-container p {
        margin: 0 12px !important;
    }
    
    .round.small {
        border-radius: 24px;
        padding: 0;
        padding-bottom: 2px;
        box-sizing: border-box;
        width: 32px;
        height: 24px;
        font-size: 24px;
        line-height: 24px;
        display: flex;
        align-items: center;
        justify-content: center;
        margin: 0;
    }
    
    .round.small p {
        height: 100%;
        padding: 0;
        display: flex;
        align-items: center;
        justify-content: center;
    }
    
    .round p {
        margin: 0;
        width: 24px;
        height: 54px;
        display: flex;
        align-items: center;
        justify-content: center;
        padding-bottom: 8px;
        padding-left: 1px;
    }
    
    .round.minus p {
        padding-bottom: 9px;
    }
    
    .no-outline {
        border: none;
        outline: none;
    }
    
    .floating-options {
        position: fixed;
        bottom: calc(2vh + 106px);
        right: calc(2vh + 40px);
        text-align: right;
    }
    
    .floating-options p {
        opacity: .2;
        transition: .2s ease all;
        margin: 0;
    }
    
    .floating-options p:hover {
        opacity: .75;
        transition: .1s ease all;
        cursor: pointer;
    }
    
    .floating-options p.__active {
        opacity: 1;
        transition: .2s ease all;
        cursor: pointer;
    }
    
    .color-palette-limit {
        position: relative;
        display: flex;
        margin-left: 8px;
    }
    
    .chevron {
        position: absolute;
        cursor: pointer;
        transition: all ease .2s;
    }
    
    .chevron:hover {
        transform: scale(1.2);
        transition: all ease .2s;
    }
    
    .chevron.up{
        width: 0;
        height: 0;
        border-style: solid;
        border-width: 0 10px 15px 10px;
        border-color: transparent transparent #2e2549 transparent;
        top: -2px;
    }
    
    .chevron.down {
        width: 0;
        height: 0;
        border-style: solid;
        border-width: 15px 10px 0 10px;
        border-color: #2e2549 transparent transparent transparent;
        bottom: -2px;
    }
    
    button:hover {
        transform: scale(1.05);
        transition: all ease .2s;
    }
    
    button.round:hover {
        transform: scale(1.2);
        transition: all ease .2s;
    }
    </style>
    <canvas-renderer></canvas-renderer>
    <frame-control active=${image_count > 1}></frame-control>
    <palette-renderer></palette-renderer>
    ${window.animation_active ? html`
    <lospec-palette></lospec-palette>
    
    <div class="fixed-buttons-left">
    <button class="no-outline" @click=${openPalettes}>Palettes</button>
    </div>
    
    <div class="fixed-buttons">
    <button class="round" @click=${togglePlayerState}><img src="${player_state ? 'pause.svg' : 'play.svg'}"></button>
    <button class="round minus" @click=${zoomOut}><p>-</p></button>
    <button class="round" @click=${zoomIn}><p>+</p></button>
    <button @click=${quantize}>Quantize colors!</button>
    <div class="color-palette-limit">
    <div class="chevron up" @click=${() => { paletteLimit(1) }}></div>
    <p class="limit">${palette_limit} colors</p>
    <div class="chevron down" @click=${() => { paletteLimit(-1) }}></div>
    </div>
    </div>
    
    <div class="fixed-buttons-right">
    <options-button>
    ${image_count > 1 ? html`<button @click=${renderGIF}>Export GIF</button>` : ''}
    <button @click=${saveFrame}>Save Frame</button>
    ${image_count > 1 ? html`<button @click=${renderFrames}>Export Frames</button>` : ''}
    ${image_count > 1 ? html`<button @click=${renderWEBM}>Export WEBM</button>` : ''}
    </options-button>
    </div>
    
    <div class="floating-options">
    <h3>Options:</h3>
    
    <p title="exclude / include rgba alpha channel" class="${!options.background ? '__active' : ''}" @click=${() => toggle('background')}>
    transparency ${!options.background ? 'on' : 'off'}
    </p>
    
    <h4>Dithering:</h4>
    
    <p title="the dithering will be applied only on quantized palettes" class="${checkDither('bayer2') ? '__active' : ''}" @click=${() => changeDither('bayer2')}>
    ordered 2x2
    </p>
    <p title="the dithering will be applied only on quantized palettes" class="${checkDither('bayer4') ? '__active' : ''}" @click=${() => changeDither('bayer4')}>
    ordered 4x4
    </p>
    <p title="the dithering will be applied only on quantized palettes" class="${checkDither('bayer8') ? '__active' : ''}" @click=${() => changeDither('bayer8')}>
    ordered 8x8
    </p>
    <p style="margin-bottom: 16px;" title="the dithering will be applied only on quantized palettes" class="${checkDither('tictac') ? '__active' : ''}" @click=${() => changeDither('tictac')}>
    tictac by <a href="https://twitter.com/_Ash_Cruz" target="_blank">@_Ash_Cruz</a>
    </p>
    
    <div class="float-container">
    <button class="round small" @click=${() => {changeRatio(-.25)}}><p>-</p></button>
    <p class="__active">ratio: ${getDitheringRatio()}</p>
    <button class="round small" @click=${() => {changeRatio(.25)}}><p>+</p></button>
    </div>
    </div>
    
    ` : html`<drop-area></drop-area>`}
    `, document.querySelector('.app'));
}

drawApp();

window.addEventListener('click', evt => {
    if (evt.target.nodeName != 'LOSPEC-PALETTE') {
        document.querySelector('lospec-palette')?.toggle(false);
    }
    
    if (evt.target.nodeName != 'FRAME-CONTROL') {
        document.querySelector('frame-control')?.onFPSInputKey(null, true);
    }
    
    if (evt.target.nodeName != 'OPTIONS-BUTTON') {
        document.querySelector('options-button')?.disable();
    }
})
window.listen('updateApp', drawApp);

window.listen('drop', images => {
    image_count = images.length;
    drawApp();
});

window.listen('frame_set', setFrame);

function toggle(key) {
    options[key] = !options[key];
    
    window.on(`${key}_change`, options[key]);
    drawApp();
}

window.listen('drop', images => {
    document.querySelector('canvas-renderer')?.setImages(images);
    document.querySelector('frame-control')?.setImages(images);
});

window.listen('frame', index => {
    document.querySelector('frame-control')?.setFrame(index);
});