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How to use multiplyAlpha method in wpt

Best JavaScript code snippet using wpt

vector4.ts

Source:vector4.ts

...59	const e = 1e-10;60	const nan = Number.NaN;61	it('should assign a Vector4 to represent a premultiplied alpha channel', () => {62		const v = Create();63		assertEquals(multiplyAlpha(v, Create()), { x : 0.0, y : 0.0, z : 0.0, w : 1.0 }, e);64		assertEquals(multiplyAlpha(v, Create(nan)), { x : nan, y : 0.0, z : 0.0, w : 1.0 }, e);65		assertEquals(multiplyAlpha(v, Create(0.0, nan)), { x : 0.0, y : nan, z : 0.0, w : 1.0 }, e);66		assertEquals(multiplyAlpha(v, Create(0.0, 0.0, nan)), { x : 0.0, y : 0.0, z : nan, w : 1.0 }, e);67		assertEquals(multiplyAlpha(v, Create(0.0, 0.0, 0.0, nan)), { x : nan, y : nan, z : nan, w : nan }, e);68		const r = multiplyAlpha(v, Create(1.0, 0.5, 0.4, 0.5));69		assertEquals(r, { x : 0.5, y : 0.25, z : 0.2, w : 0.5 }, e);70		assert.strictEqual(v, r);71		assertEquals(multiplyAlpha(v, Create(1.0, 0.5, 0.4, 0.0)), { x : 0.0, y : 0.0, z : 0.0, w : 0.0 }, e);72	});73});74describe('multiplyAssignAlpha', () => {75	const e = 1e-10;76	const nan = Number.NaN;77	it('should assign a Vector4 to represent a premultiplied alpha channel', () => {78		assertEquals(multiplyAssignAlpha(Create()), { x : 0.0, y : 0.0, z : 0.0, w : 1.0 }, e);79		assertEquals(multiplyAssignAlpha(Create(nan)), { x : nan, y : 0.0, z : 0.0, w : 1.0 }, e);80		assertEquals(multiplyAssignAlpha(Create(0.0, nan)), { x : 0.0, y : nan, z : 0.0, w : 1.0 }, e);81		assertEquals(multiplyAssignAlpha(Create(0.0, 0.0, nan)), { x : 0.0, y : 0.0, z : nan, w : 1.0 }, e);82		assertEquals(multiplyAssignAlpha(Create(0.0, 0.0, 0.0, nan)), { x : nan, y : nan, z : nan, w : nan }, e);83		const v = Create(1.0, 0.5, 0.4, 0.5);84		const r = multiplyAssignAlpha(v);85		assertEquals(r, { x : 0.5, y : 0.25, z : 0.2, w : 0.5 }, e);86		assert.strictEqual(v, r);87		assertEquals(multiplyAssignAlpha(Create(1.0, 0.5, 0.4, 0.0)), { x : 0.0, y : 0.0, z : 0.0, w : 0.0 }, e);88	});89});90describe('hadamardAssignAlpha', () => {91	const e = 1e-10;92	it('should return a vector4 representing an alpha channel multiplication', () => {93		assert.deepStrictEqual(hadamardAssignAlpha(Create(), 1.0), { x : 0.0, y : 0.0, z : 0.0, w : 1.0 });94		assert.deepStrictEqual(hadamardAssignAlpha(Create(Number.NaN), 1.0), { x : Number.NaN, y : 0.0, z : 0.0, w : 1.0 });95		assert.deepStrictEqual(hadamardAssignAlpha(Create(0.0, Number.NaN), 1.0), { x : 0.0, y : Number.NaN, z : 0.0, w : 1.0 });96		assert.deepStrictEqual(hadamardAssignAlpha(Create(0.0, 0.0, Number.NaN), 1.0), { x : 0.0, y : 0.0, z : Number.NaN, w : 1.0 });97		assert.deepStrictEqual(hadamardAssignAlpha(Create(0.0, 0.0, 0.0, Number.NaN), 1.0), { x : 0.0, y : 0.0, z : 0.0, w : Number.NaN });98		assert.deepStrictEqual(hadamardAssignAlpha(Create(), Number.NaN), { x : 0.0, y : 0.0, z : 0.0, w : Number.NaN });99		const v = Create(1.1, 2.2, 3.3, 4.4);100		const r = hadamardAssignAlpha(v, 0.5);101		assertEquals(r, { x : 1.1, y : 2.2, z : 3.3, w : 2.2 }, e);102		assert.strictEqual(v, r);103		assertEquals(hadamardAssignAlpha(Create(1.1, 2.2, 3.3, 4.4), 2.0), { x : 1.1, y : 2.2, z : 3.3, w : 8.8 }, e);104		assertEquals(hadamardAssignAlpha(Create(1.1, 2.2, 3.3, 4.4), -1.0), { x : 1.1, y : 2.2, z : 3.3, w : -4.4 }, e);105		assertEquals(hadamardAssignAlpha(Create(1.1, 2.2, 3.3, 4.4), -0.5), { x : 1.1, y : 2.2, z : 3.3, w : -2.2 }, e);106		assertEquals(hadamardAssignAlpha(Create(1.1, 2.2, 3.3, 4.4), -2.0), { x : 1.1, y : 2.2, z : 3.3, w : -8.8 }, e);107	});108});109describe('DemultiplyAlpha', () => {110	const e = 1e-10;111	const nan = Number.NaN;112	it('should return a Vector4 representing a non-premultiplied alpha channel', () => {113		assertEquals(DemultiplyAlpha(Create()), { x : 0.0, y : 0.0, z : 0.0, w : 1.0 }, e);114		assertEquals(DemultiplyAlpha(Create(nan)), { x : nan, y : 0.0, z : 0.0, w : 1.0 }, e);115		assertEquals(DemultiplyAlpha(Create(0.0, nan)), { x : 0.0, y : nan, z : 0.0, w : 1.0 }, e);116		assertEquals(DemultiplyAlpha(Create(0.0, 0.0, nan)), { x : 0.0, y : 0.0, z : nan, w : 1.0 }, e);117		assertEquals(DemultiplyAlpha(Create(0.0, 0.0, 0.0, nan)), { x : nan, y : nan, z : nan, w : nan }, e);118		assertEquals(DemultiplyAlpha(Create(1.0, 0.5, 0.4, 1.0)), { x : 1.0, y : 0.5, z : 0.4, w : 1.0 }, e);119		assertEquals(DemultiplyAlpha(Create(0.5, 0.25, 0.2, 0.5)), { x : 1.0, y : 0.5, z : 0.4, w : 0.5 }, e);120		assertEquals(DemultiplyAlpha(Create(0.0, 0.0, 0.0, 0.0)), { x : 0.0, y : 0.0, z : 0.0, w : 0.0 }, e);121		assertEquals(DemultiplyAlpha(Create(0.5, 0.25, 0.2, 0.0)), { x : 0.0, y : 0.0, z : 0.0, w : 0.0 }, e);122	});123});124describe('demultiplyAlpha', () => {125	const e = 1e-10;126	const nan = Number.NaN;127	it('should assign a Vector4 to represent a non-premultiplied alpha channel', () => {128		const v = Create();129		assertEquals(demultiplyAlpha(v, Create()), { x : 0.0, y : 0.0, z : 0.0, w : 1.0 }, e);130		assertEquals(demultiplyAlpha(v, Create(nan)), { x : nan, y : 0.0, z : 0.0, w : 1.0 }, e);131		assertEquals(demultiplyAlpha(v, Create(0.0, nan)), { x : 0.0, y : nan, z : 0.0, w : 1.0 }, e);132		assertEquals(demultiplyAlpha(v, Create(0.0, 0.0, nan)), { x : 0.0, y : 0.0, z : nan, w : 1.0 }, e);133		assertEquals(demultiplyAlpha(v, Create(0.0, 0.0, 0.0, nan)), { x : nan, y : nan, z : nan, w : nan }, e);134		const r = demultiplyAlpha(v, Create(1.0, 0.5, 0.4, 1.0));135		assertEquals(r, { x : 1.0, y : 0.5, z : 0.4, w : 1.0 }, e);136		assert.strictEqual(v, r);137		assertEquals(demultiplyAlpha(v, Create(0.5, 0.25, 0.2, 0.5)), { x : 1.0, y : 0.5, z : 0.4, w : 0.5 }, e);138		assertEquals(demultiplyAlpha(v, Create(0.0, 0.0, 0.0, 0.0)), { x : 0.0, y : 0.0, z : 0.0, w : 0.0 }, e);139		assertEquals(demultiplyAlpha(v, Create(0.5, 0.25, 0.2, 0.0)), { x : 0.0, y : 0.0, z : 0.0, w : 0.0 }, e);140	});141});142describe('demultiplyAssignAlpha', () => {143	const e = 1e-10;144	const nan = Number.NaN;145	it('should assign a Vector4 to represent a non-premultiplied alpha channel', () => {146		assertEquals(demultiplyAssignAlpha(Create()), { x : 0.0, y : 0.0, z : 0.0, w : 1.0 }, e);147		assertEquals(demultiplyAssignAlpha(Create(nan)), { x : nan, y : 0.0, z : 0.0, w : 1.0 }, e);148		assertEquals(demultiplyAssignAlpha(Create(0.0, nan)), { x : 0.0, y : nan, z : 0.0, w : 1.0 }, e);149		assertEquals(demultiplyAssignAlpha(Create(0.0, 0.0, nan)), { x : 0.0, y : 0.0, z : nan, w : 1.0 }, e);150		assertEquals(demultiplyAssignAlpha(Create(0.0, 0.0, 0.0, nan)), { x : nan, y : nan, z : nan, w : nan }, e);151		const v = Create(1.0, 0.5, 0.4, 1.0);152		const r = demultiplyAssignAlpha(v);153		assertEquals(r, { x : 1.0, y : 0.5, z : 0.4, w : 1.0 }, e);...

plus-lighter.js

Source:plus-lighter.js

1import { clamp01, multiplyAlpha, unmultiplyAlpha } from "./utils.js";2export function plusLighter(pixels) {3  if (pixels.length === 1) return pixels[0];4  return pixels.reduce((destination, source) => {5    const premultipliedSource = multiplyAlpha(source);6    const premultipliedDestination = multiplyAlpha(destination);7    const premultipliedResult = premultipliedDestination.map((channel, i) =>8      clamp01(channel + premultipliedSource[i])9    );10    return unmultiplyAlpha(premultipliedResult);11  });12}13export const tests = [14  // Each test is a list of colors to composite.15  // Each color is [r, g, b, a], unmultiplied, in the range 0-1.16  [17    [1, 0, 0, 0.5],18    [0, 0, 1, 0.5],19  ],20  [21    [1, 0, 0, 0.25],22    [0, 0, 1, 0.25],23  ],24  [...

Using AI Code Generation

1var wptools = require('wptools');2var img = wptools.image('test.png');3img.multiplyAlpha(function(err, image) {4  if (err) {5    console.log(err);6  }7  else {8    console.log(image);9  }10});

Using AI Code Generation

1var wptools = require('wptools');2var image = wptools.image('test.png');3image.multiplyAlpha(0.5, function(err, image) {4  image.write('output.png', function(err) {5    console.log('saved');6  });7});8var wptools = require('wptools');9var image = wptools.image('test.png');10image.multiplyAlpha(0.5, function(err, image) {11  image.write('output.png', function(err) {12    console.log('saved');13  });14});15var wptools = require('wptools');16var image = wptools.image('test.png');17image.multiplyAlpha(0.5, function(err, image) {18  image.write('output.png', function(err) {19    console.log('saved');20  });21});22var wptools = require('wptools');23var image = wptools.image('test.png');24image.multiplyAlpha(0.5, function(err, image) {25  image.write('output.png', function(err) {26    console.log('saved');27  });28});29var wptools = require('wptools');30var image = wptools.image('test.png');31image.multiplyAlpha(0.5, function(err, image) {32  image.write('output.png', function(err) {33    console.log('saved');34  });35});36var wptools = require('wptools');37var image = wptools.image('test.png');38image.multiplyAlpha(0.5, function(err, image) {39  image.write('output.png', function(err) {40    console.log('saved');41  });42});43var wptools = require('wptools');44var image = wptools.image('test.png');45image.multiplyAlpha(0.5, function(err, image) {46  image.write('output.png', function(err) {47    console.log('saved');

Using AI Code Generation

1var wptoolkit = require("wptoolkit");2var image = wptoolkit.image;3var image1 = image.createImage("image1.png");4image1.multiplyAlpha(0.5);5image1.save("image1.png");6var wptoolkit = require("wptoolkit");7var image = wptoolkit.image;8var image1 = image.createImage("image1.png");9image1.multiplyAlpha(0.5);10image1.save("image1.png");11var wptoolkit = require("wptoolkit");12var image = wptoolkit.image;13var image1 = image.createImage("image1.png");14image1.multiplyAlpha(0.5);15image1.save("image1.png");16var wptoolkit = require("wptoolkit");17var image = wptoolkit.image;18var image1 = image.createImage("image1.png");19image1.multiplyAlpha(0.5);20image1.save("image1.png");21var wptoolkit = require("wptoolkit");22var image = wptoolkit.image;23var image1 = image.createImage("image1.png");24image1.multiplyAlpha(0.5);25image1.save("image1.png");26var wptoolkit = require("wptoolkit");27var image = wptoolkit.image;28var image1 = image.createImage("image1.png");29image1.multiplyAlpha(0.5);30image1.save("image1.png");31var wptoolkit = require("wptoolkit");32var image = wptoolkit.image;33var image1 = image.createImage("image1.png");34image1.multiplyAlpha(0.5);35image1.save("image1.png");

Using AI Code Generation

1var wptools = require('wp-tools');2var img = new wptools.image('./test.png');3img.multiplyAlpha(0.5);4img.write('./test2.png', function(err){5  if(err) throw err;6  console.log('Image written');7});8var wptools = require('wp-tools');9var img = new wptools.image('./test.png');10img.multiplyAlpha(0.5, function(err){11  if(err) throw err;12  img.write('./test2.png', function(err){13    if(err) throw err;14    console.log('Image written');15  });16});17var wptools = require('wp-tools');18var img = new wptools.image('./test.png');19img.multiplyAlpha(0.5, function(err){20  if(err) throw err;21  img.write('./test2.png', function(err){22    if(err) throw err;23    console.log('Image written');24  });25}, './test2.png');26var wptools = require('wp-tools');27var img = new wptools.image('./test.png');28img.multiplyAlpha(0.5, function(err){29  if(err) throw err;30  img.write('./test2.png', function(err){31    if(err) throw err;32    console.log('Image written');33  });34}, './test2.png', 'png');35var wptools = require('wp-tools');36var img = new wptools.image('./test.png');37img.multiplyAlpha(0.5, function(err){38  if(err) throw err;39  img.write('./test2.png', function(err){40    if(err) throw err;41    console.log('Image written');42  });43}, './test2.png', 'png', function(err){44  if(err) throw err;45  console.log('Image written');46});47### multiplyAlphaSync(alpha, dest, type)

Using AI Code Generation

1var wptools = require('wp-tools');2var wp = new wptools();3var result = wp.multiplyAlpha(23, 4);4console.log(result);5var wptools = require('wp-tools');6var wp = new wptools();7var result = wp.multiplyAlpha(23, 4);8console.log(result);9var wptools = require('wp-tools');10var wp = new wptools();11var result = wp.multiplyAlpha(23, 4);12console.log(result);13var wptools = require('wp-tools');14var wp = new wptools();15var result = wp.multiplyAlpha(23, 4);16console.log(result);17var wptools = require('wp-tools');18var wp = new wptools();19var result = wp.multiplyAlpha(23, 4);20console.log(result);21var wptools = require('wp-tools');22var wp = new wptools();23var result = wp.multiplyAlpha(23, 4);24console.log(result);25var wptools = require('wp-tools');26var wp = new wptools();27var result = wp.multiplyAlpha(23, 4);28console.log(result);29var wptools = require('wp-tools');30var wp = new wptools();31var result = wp.multiplyAlpha(23, 4);32console.log(result);33var wptools = require('wp-tools');34var wp = new wptools();35var result = wp.multiplyAlpha(23, 4);36console.log(result);37var wptools = require('wp-tools');38var wp = new wptools();

Using AI Code Generation

1var wptools = require('wptools');2var multiplyAlpha = wptools.multiplyAlpha;3multiplyAlpha(0.5, 128, 255, 0, 0);4var wptools = require('wptools');5var multiplyAlpha = wptools.multiplyAlpha;6multiplyAlpha(0.5, 128, 255, 0, 0);7var wptools = require('wptools');8var multiplyAlpha = wptools.multiplyAlpha;9multiplyAlpha(0.5, 128, 255, 0, 0);10var wptools = require('wptools');11var multiplyAlpha = wptools.multiplyAlpha;12multiplyAlpha(0.5, 128, 255, 0, 0);13var wptools = require('wptools');14var multiplyAlpha = wptools.multiplyAlpha;15multiplyAlpha(0.5, 128, 255, 0, 0);16var wptools = require('wptools');17var multiplyAlpha = wptools.multiplyAlpha;18multiplyAlpha(0.5, 128, 255, 0, 0);19var wptools = require('wptools');

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