import scrawl from '../source/scrawl.js';import scrawl from '../source/scrawl.js';const canvas = scrawl.library.canvas.mycanvas;
scrawl.importDomImage('.flowers');Create the filter
const myFilter = scrawl.makeFilter({
name: 'channelLevels',
method: 'channelLevels',
red: [50, 200],
green: [60, 220, 150],
blue: [40, 180],
alpha: [],
});Create the target entity
scrawl.makePicture({
name: 'base-piccy',
asset: 'iris',
width: '100%',
height: '100%',
copyWidth: '100%',
copyHeight: '100%',
method: 'fill',
filters: ['channelLevels'],
});Function to display frames-per-second data, and other information relevant to the demo
let report = function () {
let testTicker = Date.now(),
testTime, testNow,
testMessage = document.querySelector('#reportmessage');
let red = document.querySelector('#red'),
green = document.querySelector('#green'),
alpha = document.querySelector('#alpha'),
blue = document.querySelector('#blue'),
opacity = document.querySelector('#opacity');
return function () {
testNow = Date.now();
testTime = testNow - testTicker;
testTicker = testNow;
testMessage.textContent = `Screen refresh: ${Math.ceil(testTime)}ms; fps: ${Math.floor(1000 / testTime)}
Red: [${red.value}]
Green: [${green.value}]
Blue: [${blue.value}]
Alpha: [${alpha.value}]
Opacity: ${opacity.value}`;
};
}();Create the Display cycle animation
const demoAnimation = scrawl.makeRender({
name: "demo-animation",
target: canvas,
afterShow: report,
});scrawl.addNativeListener(
['input', 'change'],
(e) => {
let a;
if (e.target.id === 'opacity') a = e.target.value;
else {
let temp = e.target.value.split(',');
a = [];
temp.forEach(t => {
let n = parseInt(t, 10);
if (n.toFixed && !isNaN(n)) a.push(n)
});
}
myFilter.set({
[e.target.id]: a,
});
},
'.controlItem');Setup form
document.querySelector('#red').value = '50, 200';
document.querySelector('#green').value = '60, 220, 150';
document.querySelector('#blue').value = '40, 180';
document.querySelector('#alpha').value = '';
document.querySelector('#opacity').value = 1;console.log(scrawl.library);