import scrawl from '../source/scrawl.js';import scrawl from '../source/scrawl.js';const canvas = scrawl.library.canvas.mycanvas;
scrawl.importDomImage('.flowers');Create the target entity
const piccy = scrawl.makePicture({
name: 'base-piccy',
asset: 'iris',
width: '100%',
height: '100%',
copyWidth: '100%',
copyHeight: '100%',
method: 'fill',
filter: 'url(#svg-posterize)',
});We create the filter in the HTML script, not here:
<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
<filter id="svg-posterize">
<feComponentTransfer>
<feFuncR type="discrete" tableValues=".1 .4 .7 1" />
<feFuncG type="discrete" tableValues=".1 .4 .7 1" />
<feFuncB type="discrete" tableValues=".1 .4 .7 1" />
</feComponentTransfer>
</filter>
</svg>let feFuncR = document.querySelector('feFuncR'),
feFuncG = document.querySelector('feFuncG'),
feFuncB = document.querySelector('feFuncB');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');
return function () {
testNow = Date.now();
testTime = testNow - testTicker;
testTicker = testNow;
testMessage.textContent = `Screen refresh: ${Math.ceil(testTime)}ms; fps: ${Math.floor(1000 / testTime)}
<filter id="svg-posterize">
<feComponentTransfer>
<feFuncR type="discrete" tableValues="${feFuncR.getAttribute('tableValues')}" />
<feFuncG type="discrete" tableValues="${feFuncG.getAttribute('tableValues')}" />
<feFuncB type="discrete" tableValues="${feFuncB.getAttribute('tableValues')}" />
</feComponentTransfer>
</filter>`;
};
}();Create the Display cycle animation
const demoAnimation = scrawl.makeRender({
name: "demo-animation",
target: canvas,
afterShow: report,
});let r1 = document.querySelector('#r1'),
r2 = document.querySelector('#r2'),
r3 = document.querySelector('#r3'),
r4 = document.querySelector('#r4');
let g1 = document.querySelector('#g1'),
g2 = document.querySelector('#g2'),
g3 = document.querySelector('#g3'),
g4 = document.querySelector('#g4');
let b1 = document.querySelector('#b1'),
b2 = document.querySelector('#b2'),
b3 = document.querySelector('#b3'),
b4 = document.querySelector('#b4');
r1.value = 0.1;
r2.value = 0.4;
r3.value = 0.7;
r4.value = 1;
g1.value = 0.1;
g2.value = 0.4;
g3.value = 0.7;
g4.value = 1;
b1.value = 0.1;
b2.value = 0.4;
b3.value = 0.7;
b4.value = 1;Setup form functionality
let updateR = () => feFuncR.setAttribute('tableValues', `${r1.value} ${r2.value} ${r3.value} ${r4.value}`);
scrawl.addNativeListener(['input', 'change'], updateR, '.feFuncR');
let updateG = () => feFuncG.setAttribute('tableValues', `${g1.value} ${g2.value} ${g3.value} ${g4.value}`);
scrawl.addNativeListener(['input', 'change'], updateG, '.feFuncG');
let updateB = () => feFuncB.setAttribute('tableValues', `${b1.value} ${b2.value} ${b3.value} ${b4.value}`);
scrawl.addNativeListener(['input', 'change'], updateB, '.feFuncB');console.log(scrawl.library);