import * as scrawl from '../source/scrawl.js';
import { reportSpeed, addImageDragAndDrop, addCheckerboardBackground, initializeDomInputs } from './utilities.js';
import * as scrawl from '../source/scrawl.js';
import { reportSpeed, addImageDragAndDrop, addCheckerboardBackground, initializeDomInputs } 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(canvas, namespace);
Create the filter
const myFilter = scrawl.makeFilter({
name: name('emboss'),
method: 'emboss',
angle: 225,
strength: 3,
smoothing: 0,
tolerance: 0,
clamp: 0,
postProcessResults: true,
useNaturalGrayscale: false,
keepOnlyChangedAreas: false,
});
Create the target entity
const piccy = scrawl.makePicture({
name: name('image'),
asset: 'iris',
dimensions: ['100%', '100%'],
copyDimensions: ['100%', '100%'],
filters: [name('emboss')],
});
Function to display frames-per-second data, and other information relevant to the demo
const report = reportSpeed('#reportmessage', function () {
return `
Angle: ${dom.angle.value}°
Strength: ${dom.strength.value}
Smoothing: ${dom.smoothing.value}
Clamp: ${dom.clamp.value}
Tolerance: ${dom.tolerance.value}
Opacity: ${dom.opacity.value}`;
});
Create the Display cycle animation
scrawl.makeRender({
name: name('animation'),
target: canvas,
afterShow: report,
});
const dom = initializeDomInputs([
['input', 'strength', '3'],
['input', 'angle', '225'],
['input', 'smoothing', '0'],
['input', 'clamp', '0'],
['input', 'tolerance', '0'],
['input', 'opacity', '1'],
['select', 'postProcessResults', 0],
['select', 'useNaturalGrayscale', 0],
['select', 'keepOnlyChangedAreas', 0],
['select', 'memoizeFilterOutput', 0],
]);
Handle memoizeFilterOutput control
scrawl.addNativeListener(['input', 'change'], (e) => {
const val = (e.target.value === '0') ? false : true;
piccy.set({ memoizeFilterOutput: val });
}, dom.memoizeFilterOutput);
Setup remianing form observer functionality
scrawl.makeUpdater({
event: ['input', 'change'],
origin: '.controlItem',
target: myFilter,
useNativeListener: true,
preventDefault: true,
updates: {
strength: ['strength', 'float'],
angle: ['angle', 'float'],
smoothing: ['smoothing', 'round'],
tolerance: ['tolerance', 'round'],
clamp: ['clamp', 'round'],
postProcessResults: ['postProcessResults', 'boolean'],
useNaturalGrayscale: ['useNaturalGrayscale', 'boolean'],
keepOnlyChangedAreas: ['keepOnlyChangedAreas', 'boolean'],
opacity: ['opacity', 'float'],
},
});
addImageDragAndDrop(canvas, `#${namespace} .assets`, piccy);
console.log(scrawl.library);