import * as scrawl from '../source/scrawl.js';
import { reportSpeed, addImageDragAndDrop } from './utilities.js';import * as scrawl from '../source/scrawl.js';
import { reportSpeed, addImageDragAndDrop } from './utilities.js';const canvas = scrawl.findCanvas('mycanvas');Namespacing boilerplate
const namespace = canvas.name;
const name = (n) => `${namespace}-${n}`;Import the initial image used by the Picture entity
scrawl.importDomImage('.flowers');Create the filter
const myFilter = scrawl.makeFilter({
name: name('flood'),
method: 'flood',
red: 255,
green: 255,
blue: 0,
alpha: 255,
opacity: 0.4,
});
const colorFactory = scrawl.makeColor({
name: name('colors'),
});Create the target entity
const piccy = scrawl.makePicture({
name: name('image'),
asset: 'iris',
copyDimensions: ['100%', '100%'],
dimensions: ['95%', '95%'],
handle: ['center', 'center'],
start: ['center', 'center'],
filters: [name('flood')],
});Function to display frames-per-second data, and other information relevant to the demo
const report = reportSpeed('#reportmessage', function () {
return `
Reference color: ${dom.reference.value}
Red: ${dom.red.value}
Green: ${dom.green.value}
Blue: ${dom.blue.value}
Alpha: ${dom.alpha.value}
Opacity: ${dom.opacity.value}`;
});Create the Display cycle animation
scrawl.makeRender({
name: name('animation'),
target: canvas,
afterShow: report,
});const dom = scrawl.initializeDomInputs([
['input', 'reference', '#ffff00'],
['input', 'red', '255'],
['input', 'green', '255'],
['input', 'blue', '0'],
['input', 'alpha', '255'],
['input', 'opacity', '0.4'],
]);Handle user input from the color selector
scrawl.addNativeListener(['input', 'change'], (e) => {
if (e && e.target) {
const val = e.target.value;
myFilter.set({ reference: val });
const [r, g, b, a] = colorFactory.extractRGBfromColorString(val);
dom.red.value = `${r}`;
dom.green.value = `${g}`;
dom.blue.value = `${b}`;
dom.alpha.value = `${Math.round(a * 255)}`;
}
}, '.colorSelector');Handle remaining input updates
scrawl.makeUpdater({
event: ['input', 'change'],
origin: '.controlItem',
target: myFilter,
useNativeListener: true,
preventDefault: true,
updates: {
red: ['red', 'int'],
green: ['green', 'int'],
blue: ['blue', 'int'],
alpha: ['alpha', 'int'],
opacity: ['opacity', 'float'],
},
callback: () => {
const val = (v) => parseInt(v, 10);
dom.reference.value = colorFactory.convertRGBtoHex(
val(dom.red.value),
val(dom.green.value),
val(dom.blue.value)
);
},
});addImageDragAndDrop(scrawl, canvas, `#${namespace} .assets`, piccy);console.log(scrawl.library);