sharp/test/unit/joinChannel.js
Lovell Fuller 8717ecc429 Modularise JS source in 'lib' subdirectory.
Generate public API documention via jsdoc comments.
2016-11-02 09:25:20 +00:00

150 lines
5.6 KiB
JavaScript

'use strict';
const assert = require('assert');
const fs = require('fs');
const sharp = require('../../');
const fixtures = require('../fixtures');
describe('Image channel insertion', function () {
it('Grayscale to RGB, buffer', function (done) {
sharp(fixtures.inputPng) // gray -> red
.resize(320, 240)
.joinChannel(fixtures.inputPngTestJoinChannel) // new green channel
.joinChannel(fixtures.inputPngStripesH) // new blue channel
.toBuffer(function (err, data, info) {
if (err) throw err;
assert.strictEqual(320, info.width);
assert.strictEqual(240, info.height);
assert.strictEqual(3, info.channels);
fixtures.assertSimilar(fixtures.expected('joinChannel-rgb.jpg'), data, done);
});
});
it('Grayscale to RGB, file', function (done) {
sharp(fixtures.inputPng) // gray -> red
.resize(320, 240)
.joinChannel(fs.readFileSync(fixtures.inputPngTestJoinChannel)) // new green channel
.joinChannel(fs.readFileSync(fixtures.inputPngStripesH)) // new blue channel
.toBuffer(function (err, data, info) {
if (err) throw err;
assert.strictEqual(320, info.width);
assert.strictEqual(240, info.height);
assert.strictEqual(3, info.channels);
fixtures.assertSimilar(fixtures.expected('joinChannel-rgb.jpg'), data, done);
});
});
it('Grayscale to RGBA, buffer', function (done) {
sharp(fixtures.inputPng) // gray -> red
.resize(320, 240)
.joinChannel([fixtures.inputPngTestJoinChannel,
fixtures.inputPngStripesH,
fixtures.inputPngStripesV]) // new green + blue + alpha channel
.toColourspace(sharp.colourspace.srgb)
.toBuffer(function (err, data, info) {
if (err) throw err;
assert.strictEqual(320, info.width);
assert.strictEqual(240, info.height);
assert.strictEqual(4, info.channels);
fixtures.assertSimilar(fixtures.expected('joinChannel-rgba.png'), data, done);
});
});
it('Grayscale to RGBA, file', function (done) {
sharp(fixtures.inputPng) // gray -> red
.resize(320, 240)
.joinChannel([fs.readFileSync(fixtures.inputPngTestJoinChannel), // new green channel
fs.readFileSync(fixtures.inputPngStripesH), // new blue channel
fs.readFileSync(fixtures.inputPngStripesV)]) // new alpha channel
.toColourspace('srgb')
.toBuffer(function (err, data, info) {
if (err) throw err;
assert.strictEqual(320, info.width);
assert.strictEqual(240, info.height);
assert.strictEqual(4, info.channels);
fixtures.assertSimilar(fixtures.expected('joinChannel-rgba.png'), data, done);
});
});
it('Grayscale to CMYK, buffers', function (done) {
sharp(fixtures.inputPng) // gray -> magenta
.resize(320, 240)
.joinChannel([fs.readFileSync(fixtures.inputPngTestJoinChannel), // new cyan channel
fs.readFileSync(fixtures.inputPngStripesH), // new yellow channel
fs.readFileSync(fixtures.inputPngStripesV)]) // new black channel
.toColorspace('cmyk')
.toFormat('jpeg')
.toBuffer(function (err, data, info) {
if (err) throw err;
assert.strictEqual(320, info.width);
assert.strictEqual(240, info.height);
assert.strictEqual(4, info.channels);
fixtures.assertSimilar(fixtures.expected('joinChannel-cmyk.jpg'), data, done);
});
});
it('Join raw buffers to RGB', function (done) {
Promise.all([
sharp(fixtures.inputPngTestJoinChannel).toColourspace('b-w').raw().toBuffer(),
sharp(fixtures.inputPngStripesH).toColourspace('b-w').raw().toBuffer()
])
.then(function (buffers) {
sharp(fixtures.inputPng)
.resize(320, 240)
.joinChannel(buffers,
{ raw: {
width: 320,
height: 240,
channels: 1
}})
.toBuffer(function (err, data, info) {
if (err) throw err;
assert.strictEqual(320, info.width);
assert.strictEqual(240, info.height);
assert.strictEqual(3, info.channels);
fixtures.assertSimilar(fixtures.expected('joinChannel-rgb.jpg'), data, done);
});
})
.catch(function (err) {
throw err;
});
});
it('Grayscale to RGBA, files, two arrays', function (done) {
sharp(fixtures.inputPng) // gray -> red
.resize(320, 240)
.joinChannel([fs.readFileSync(fixtures.inputPngTestJoinChannel)]) // new green channel
.joinChannel([fs.readFileSync(fixtures.inputPngStripesH), // new blue channel
fs.readFileSync(fixtures.inputPngStripesV)]) // new alpha channel
.toColourspace('srgb')
.toBuffer(function (err, data, info) {
if (err) throw err;
assert.strictEqual(320, info.width);
assert.strictEqual(240, info.height);
assert.strictEqual(4, info.channels);
fixtures.assertSimilar(fixtures.expected('joinChannel-rgba.png'), data, done);
});
});
it('Invalid raw buffer description', function () {
assert.throws(function () {
sharp().joinChannel(fs.readFileSync(fixtures.inputPng), {raw: {}});
});
});
it('Invalid input', function () {
assert.throws(function () {
sharp(fixtures.inputJpg)
.joinChannel(1);
});
});
it('No arguments', function () {
assert.throws(function () {
sharp(fixtures.inputJpg)
.joinChannel();
});
});
});