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: 'areaAlpha',
method: 'areaAlpha',
tileWidth: 10,
tileHeight: 10,
gutterWidth: 10,
gutterHeight: 10,
offsetX: 0,
offsetY: 0,
areaAlphaLevels: [255, 255, 0, 0],
});Create the target entity
scrawl.makePicture({
name: 'base-piccy',
asset: 'iris',
width: '100%',
height: '100%',
copyWidth: '100%',
copyHeight: '100%',
method: 'fill',
filters: ['areaAlpha'],
});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 tile_width = document.querySelector('#tile_width'),
tile_height = document.querySelector('#tile_height'),
gutter_width = document.querySelector('#gutter_width'),
gutter_height = document.querySelector('#gutter_height'),
alpha_0 = document.querySelector('#alpha_0'),
alpha_1 = document.querySelector('#alpha_1'),
alpha_2 = document.querySelector('#alpha_2'),
alpha_3 = document.querySelector('#alpha_3'),
offset_x = document.querySelector('#offset_x'),
offset_y = document.querySelector('#offset_y'),
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)}
Tile dimensions - width: ${tile_width.value} height: ${tile_height.value}
Gutter dimensions - width: ${gutter_width.value} height: ${gutter_height.value}
Offset - x: ${offset_x.value} y: ${offset_y.value}
areaAlphaLevels array: [${alpha_0.value}, ${alpha_1.value}, ${alpha_2.value}, ${alpha_3.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: {
tile_width: ['tileWidth', 'round'],
tile_height: ['tileHeight', 'round'],
gutter_width: ['gutterWidth', 'round'],
gutter_height: ['gutterHeight', 'round'],
offset_x: ['offsetX', 'round'],
offset_y: ['offsetY', 'round'],
opacity: ['opacity', 'float'],
},
});
scrawl.addNativeListener(['input', 'change'], function (e) {
let a0 = parseInt(document.querySelector('#alpha_0').value, 10),
a1 = parseInt(document.querySelector('#alpha_1').value, 10),
a2 = parseInt(document.querySelector('#alpha_2').value, 10),
a3 = parseInt(document.querySelector('#alpha_3').value, 10);
myFilter.set({
areaAlphaLevels: [a0, a2, a1, a3],
});
}, '.alphas');Setup form
document.querySelector('#tile_width').value = 10;
document.querySelector('#tile_height').value = 10;
document.querySelector('#gutter_width').value = 10;
document.querySelector('#gutter_height').value = 10;
document.querySelector('#offset_x').value = 0;
document.querySelector('#offset_y').value = 0;
document.querySelector('#opacity').value = 1;
document.querySelector('#alpha_0').value = 255;
document.querySelector('#alpha_1').value = 0;
document.querySelector('#alpha_2').value = 255;
document.querySelector('#alpha_3').value = 0;console.log(scrawl.library);