import scrawl from '../source/scrawl.js';import scrawl from '../source/scrawl.js';const canvas = scrawl.library.canvas.mycanvas;
scrawl.importDomImage('.flowers');
const myFilter = scrawl.makeFilter({
name: 'clamp',
method: 'clampChannels',
lowRed: 0,
lowGreen: 0,
lowBlue: 0,
highRed: 255,
highGreen: 255,
highBlue: 255,
opacity: 1,
});Create the target entity
scrawl.makePicture({
name: 'base-piccy',
asset: 'iris',
width: '100%',
height: '100%',
copyWidth: '100%',
copyHeight: '100%',
method: 'fill',
filters: ['clamp'],
});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 lowRed = document.querySelector('#low-red'),
lowGreen = document.querySelector('#low-green'),
lowBlue = document.querySelector('#low-blue'),
highRed = document.querySelector('#high-red'),
highGreen = document.querySelector('#high-green'),
highBlue = document.querySelector('#high-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: ${lowRed.value} - ${highRed.value}
Green: ${lowGreen.value} - ${highGreen.value}
Blue: ${lowBlue.value} - ${highBlue.value}
Opacity - ${opacity.value}`;
};
}();Create the Display cycle animation
const demoAnimation = scrawl.makeRender({
name: "demo-animation",
target: canvas,
afterShow: report,
});scrawl.observeAndUpdate({
event: ['input', 'change'],
origin: '.controlItem',
target: myFilter,
useNativeListener: true,
preventDefault: true,
updates: {
'low-red': ['lowRed', 'round'],
'low-green': ['lowGreen', 'round'],
'low-blue': ['lowBlue', 'round'],
'high-red': ['highRed', 'round'],
'high-green': ['highGreen', 'round'],
'high-blue': ['highBlue', 'round'],
'opacity': ['opacity', 'float'],
},
});Setup form
document.querySelector('#low-red').value = 0;
document.querySelector('#low-green').value = 0;
document.querySelector('#low-blue').value = 0;
document.querySelector('#high-red').value = 255;
document.querySelector('#high-green').value = 255;
document.querySelector('#high-blue').value = 255;
document.querySelector('#opacity').value = 1;console.log(scrawl.library);