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: 'channels',
method: 'channels',
red: 1,
green: 1,
blue: 1,
});Create the target entity
scrawl.makePicture({
name: 'base-piccy',
asset: 'iris',
width: '100%',
height: '100%',
copyWidth: '100%',
copyHeight: '100%',
method: 'fill',
filters: ['channels'],
});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'),
blue = document.querySelector('#blue'),
alpha = document.querySelector('#alpha'),
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.observeAndUpdate({
event: ['input', 'change'],
origin: '.controlItem',
target: myFilter,
useNativeListener: true,
preventDefault: true,
updates: {
red: ['red', 'float'],
green: ['green', 'float'],
blue: ['blue', 'float'],
alpha: ['alpha', 'float'],
opacity: ['opacity', 'float'],
},
});Setup form
document.querySelector('#red').value = 1;
document.querySelector('#green').value = 1;
document.querySelector('#blue').value = 1;
document.querySelector('#alpha').value = 1;
document.querySelector('#opacity').value = 1;console.log(scrawl.library);