import * as scrawl from '../source/scrawl.js';
import { reportSpeed, addImageDragAndDrop, addCheckerboardBackground } from './utilities.js';import * as scrawl from '../source/scrawl.js';
import { reportSpeed, addImageDragAndDrop, addCheckerboardBackground } 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 background
addCheckerboardBackground(scrawl, canvas, namespace);Create the filter
const offset = scrawl.makeFilter({
name: name('offset'),
method: 'offsetChannels',
offsetRedX: -20,
offsetRedY: -20,
offsetGreenX: 20,
offsetGreenY: 20,
offsetBlueX: -20,
offsetBlueY: 20,
useInputAsMask: false,
});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('offset')],
});Function to display frames-per-second data, and other information relevant to the demo
const report = reportSpeed('#reportmessage', function () {
return `
Red offset - X: ${dom.offsetRedX.value}; Y ${dom.offsetRedY.value}
Green offset - X: ${dom.offsetGreenX.value}; Y ${dom.offsetGreenY.value}
Blue offset - X: ${dom.offsetBlueX.value}; Y ${dom.offsetBlueY.value}
Opacity: ${dom.opacity.value}`;
});Create the Display cycle animation
scrawl.makeRender({
name: name('animation'),
target: canvas,
afterShow: report,
});const dom = scrawl.initializeDomInputs([
['input', 'offsetRedX', '-20'],
['input', 'offsetRedY', '-20'],
['input', 'offsetGreenX', '20'],
['input', 'offsetGreenY', '20'],
['input', 'offsetBlueX', '-20'],
['input', 'offsetBlueY', '20'],
['input', 'opacity', '1'],
['select', 'useInputAsMask', 0],
]);Setup form observer functionality
scrawl.makeUpdater({
event: ['input', 'change'],
origin: '.controlItem',
target: offset,
useNativeListener: true,
preventDefault: true,
updates: {
opacity: ['opacity', 'float'],
offsetRedX: ['offsetRedX', 'round'],
offsetRedY: ['offsetRedY', 'round'],
offsetGreenX: ['offsetGreenX', 'round'],
offsetGreenY: ['offsetGreenY', 'round'],
offsetBlueX: ['offsetBlueX', 'round'],
offsetBlueY: ['offsetBlueY', 'round'],
useInputAsMask: ['useInputAsMask', 'boolean'],
},
});addImageDragAndDrop(scrawl, canvas, `#${namespace} .assets`, piccy);console.log(scrawl.library);