import * as scrawl from '../source/scrawl.js';
import { reportSpeed, addImageDragAndDrop } from './utilities.js';Filter parameters: red, green, blue, cyan, magenta, yellow, notred, notgreen, notblue, grayscale, sepia, invert
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');Preparation
const filterMethods = [
'red', 'green', 'blue',
'cyan', 'magenta', 'yellow',
'notred', 'notgreen', 'notblue',
'grayscale', 'sepia', 'invert'
];
const positions = [
[10, 10], [140, 10], [270, 10],
[10, 140], [140, 140], [270, 140],
[10, 270], [140, 270], [270, 270],
[10, 400], [140, 400], [270, 400],
];
const filters = [];
const pictureGroup = scrawl.makeGroup({
name: name('pictures'),
host: canvas.getBase(),
});
pictureGroup.clone({
name: name('labels'),
});
const capitalize = (item) => item[0].toUpperCase() + item.slice(1);Build out the filters and entitys
filterMethods.forEach((n, index) => {
filters.push(scrawl.makeFilter({
name: name(`${n}-filter`),
method: n,
}));
scrawl.makePicture({
name: name(`${n}-output`),
group: name('pictures'),
asset: 'iris',
start: positions[index],
dimensions: [120, 120],
copyDimensions: ['100%', '100%'],
filters: [name(`${n}-filter`)],
});
scrawl.makeLabel({
name: name(`${n}-label`),
group: name('labels'),
text: capitalize(n),
fontString: '20px sans-serif',
fillStyle: 'white',
lineWidth: 4,
method: 'drawThenFill',
pivot: name(`${n}-output`),
lockTo: 'pivot',
offset: [5, 5],
});
});Function to display frames-per-second data, and other information relevant to the demo
const report = reportSpeed('#reportmessage', function () {
return `
Opacity: ${dom.opacity.value}`;
});Create the Display cycle animation
scrawl.makeRender({
name: name('animation'),
target: canvas,
afterShow: report,
});const dom = scrawl.initializeDomInputs([
['input', 'opacity', '1'],
['select', 'memoizeFilterOutput', 0],
]);Updating the Picture entitys for memoizeFilterOutput
scrawl.makeUpdater({
event: ['input', 'change'],
origin: dom.memoizeFilterOutput,
target: pictureGroup,
useNativeListener: true,
preventDefault: true,
updates: {
memoizeFilterOutput: ['memoizeFilterOutput', 'boolean'],
},
});Updating the Filter objects for opacity
scrawl.addNativeListener(['input', 'change'], (e) => {
const val = parseFloat(e.target.value);
filters.forEach(f => f.set({ opacity: val }));
}, dom.opacity);addImageDragAndDrop(scrawl, canvas, `#${namespace} .assets`, pictureGroup);console.log(scrawl.library);