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('clamp'),
method: 'clampChannels',
lowRed: 20,
lowGreen: 0,
lowBlue: 120,
highRed: 255,
highGreen: 216,
highBlue: 0,
opacity: 1,
});
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('clamp')],
});Function to display frames-per-second data, and other information relevant to the demo
const report = reportSpeed('#reportmessage', function () {
return `
Red - low: ${dom.low_red.value}, high - ${dom.high_red.value}
Green - low: ${dom.low_green.value}, high - ${dom.high_green.value}
Blue - low: ${dom.low_blue.value}, high - ${dom.high_blue.value}
Color - low: ${dom.low_color.value}, high: ${dom.high_color.value}
Opacity - ${dom.opacity.value}`;
});Create the Display cycle animation
scrawl.makeRender({
name: name('animation'),
target: canvas,
afterShow: report,
});const dom = scrawl.initializeDomInputs([
['input', 'low_color', '#170078'],
['input', 'low_red', '20'],
['input', 'low_green', '0'],
['input', 'low_blue', '120'],
['input', 'high_color', '#ffd800'],
['input', 'high_red', '255'],
['input', 'high_green', '216'],
['input', 'high_blue', '0'],
['input', 'opacity', '1'],
]);Handle color selectors
scrawl.addNativeListener(['input', 'change'], (e) => {
if (e && e.target) {
const target = e.target.id,
val = e.target.value;
const [r, g, b] = colorFactory.extractRGBfromColorString(val);
if ('low_color' === target) {
myFilter.set({ lowColor: val });
dom.low_red.value = r.toFixed(0);
dom.low_green.value = g.toFixed(0);
dom.low_blue.value = b.toFixed(0);
}
else if ('high_color' === target) {
myFilter.set({ highColor: val });
dom.high_red.value = r.toFixed(0);
dom.high_green.value = g.toFixed(0);
dom.high_blue.value = b.toFixed(0);
}
}
}, '.colorSelector');Handle other user input
scrawl.makeUpdater({
event: ['input', 'change'],
origin: '.controlItem',
target: myFilter,
useNativeListener: true,
preventDefault: true,
updates: {
low_red: ['lowRed', 'round'],
low_green: ['lowGreen', 'round'],
low_blue: ['lowBlue', 'round'],
high_red: ['highRed', 'round'],
high_green: ['highGreen', 'round'],
high_blue: ['highBlue', 'round'],
opacity: ['opacity', 'float'],
},
callback: () => {
dom.low_color.value = colorFactory.convertRGBtoHex(parseInt(dom.low_red.value, 10), parseInt(dom.low_green.value, 10), parseInt(dom.low_blue.value, 10));
dom.high_color.value = colorFactory.convertRGBtoHex(parseInt(dom.high_red.value, 10), parseInt(dom.high_green.value, 10), parseInt(dom.high_blue.value, 10));
},
});addImageDragAndDrop(scrawl, canvas, `#${namespace} .assets`, piccy);console.log(scrawl.library);