import scrawl from '../source/scrawl.js';import scrawl from '../source/scrawl.js';const canvas = scrawl.library.canvas.mycanvas;
scrawl.importDomImage('.flowers');
canvas.setBase({
backgroundColor: 'red',
})Create the filter
ranges attributeconst myFilter = scrawl.makeFilter({
name: 'chromakey',
method: 'chromakey',
red: 0,
green: 127,
blue: 0,
opaqueAt: 1,
transparentAt: 0,
});Create the target entity
scrawl.makePicture({
name: 'base-piccy',
asset: 'iris',
width: '100%',
height: '100%',
copyWidth: '100%',
copyHeight: '100%',
method: 'fill',
filters: ['chromakey'],
});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 col = document.querySelector('#color'),
trans = document.querySelector('#transparentAt'),
opaq = document.querySelector('#opaqueAt'),
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)}
Key color: ${col.value}
Transparent at: ${trans.value}, Opaque at: ${opaq.value}
Opacity: ${opacity.value}`;
};
}();Create the Display cycle animation
const demoAnimation = scrawl.makeRender({
name: "demo-animation",
target: canvas,
afterShow: report,
});const interpretColors = function () {
const converter = scrawl.makeColor({
name: 'converter',
});
const color = document.querySelector('#color');
return function () {
converter.convert(color.value);
myFilter.set({
red: converter.r,
green: converter.g,
blue: converter.b,
});
}
}();
scrawl.addNativeListener(['input', 'change'], interpretColors, '.controlItem');
scrawl.observeAndUpdate({
event: ['input', 'change'],
origin: '.controlItem',
target: myFilter,
useNativeListener: true,
preventDefault: true,
updates: {
transparentAt: ['transparentAt', 'float'],
opaqueAt: ['opaqueAt', 'float'],
opacity: ['opacity', 'float'],
},
});Setup form
document.querySelector('#color').value = '#007700';console.log(scrawl.library);