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Add support for arbitrary rotation angle via vips_rotate (#1385)

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freezy
2018-09-27 19:00:36 +02:00
committed by Lovell Fuller
parent 37d385fafa
commit 796738da65
8 changed files with 163 additions and 36 deletions
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test/fixtures/expected/rotate-solid-bg.jpg vendored Normal file
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test/fixtures/expected/rotate-transparent-bg.png vendored Normal file
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89
test/unit/rotate.js
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@@ -23,6 +23,33 @@ describe('Rotation', function () {
});
});
it('Rotate by 30 degrees with semi-transparent background', function (done) {
sharp(fixtures.inputJpg)
.rotate(30, {background: { r: 255, g: 0, b: 0, alpha: 0.5 }})
.resize(320)
.png()
.toBuffer(function (err, data, info) {
if (err) throw err;
assert.strictEqual('png', info.format);
assert.strictEqual(408, info.width);
assert.strictEqual(386, info.height);
fixtures.assertSimilar(fixtures.expected('rotate-transparent-bg.png'), data, done);
});
});
it('Rotate by 30 degrees with solid background', function (done) {
sharp(fixtures.inputJpg)
.rotate(30, {background: { r: 255, g: 0, b: 0, alpha: 0.5 }})
.resize(320)
.toBuffer(function (err, data, info) {
if (err) throw err;
assert.strictEqual('jpeg', info.format);
assert.strictEqual(408, info.width);
assert.strictEqual(386, info.height);
fixtures.assertSimilar(fixtures.expected('rotate-solid-bg.jpg'), data, done);
});
});
it('Rotate by 90 degrees, respecting output input size', function (done) {
sharp(fixtures.inputJpg).rotate(90).resize(320, 240).toBuffer(function (err, data, info) {
if (err) throw err;
@@ -34,6 +61,17 @@ describe('Rotation', function () {
});
});
it('Rotate by 30 degrees, respecting output input size', function (done) {
sharp(fixtures.inputJpg).rotate(30).resize(320, 240).toBuffer(function (err, data, info) {
if (err) throw err;
assert.strictEqual(true, data.length > 0);
assert.strictEqual('jpeg', info.format);
assert.strictEqual(397, info.width);
assert.strictEqual(368, info.height);
done();
});
});
[-3690, -450, -90, 90, 450, 3690].forEach(function (angle) {
it('Rotate by any 90-multiple angle (' + angle + 'deg)', function (done) {
sharp(fixtures.inputJpg320x240).rotate(angle).toBuffer(function (err, data, info) {
@@ -45,6 +83,17 @@ describe('Rotation', function () {
});
});
[-3750, -510, -150, 30, 390, 3630].forEach(function (angle) {
it('Rotate by any 30-multiple angle (' + angle + 'deg)', function (done) {
sharp(fixtures.inputJpg320x240).rotate(angle).toBuffer(function (err, data, info) {
if (err) throw err;
assert.strictEqual(397, info.width);
assert.strictEqual(368, info.height);
done();
});
});
});
[-3780, -540, 0, 180, 540, 3780].forEach(function (angle) {
it('Rotate by any 180-multiple angle (' + angle + 'deg)', function (done) {
sharp(fixtures.inputJpg320x240).rotate(angle).toBuffer(function (err, data, info) {
@@ -74,6 +123,24 @@ describe('Rotation', function () {
});
});
it('Rotate by 315 degrees, square output ignoring aspect ratio', function (done) {
sharp(fixtures.inputJpg)
.resize(240, 240)
.ignoreAspectRatio()
.rotate(315)
.toBuffer(function (err, data, info) {
if (err) throw err;
assert.strictEqual(339, info.width);
assert.strictEqual(339, info.height);
sharp(data).metadata(function (err, metadata) {
if (err) throw err;
assert.strictEqual(339, metadata.width);
assert.strictEqual(339, metadata.height);
done();
});
});
});
it('Rotate by 270 degrees, rectangular output ignoring aspect ratio', function (done) {
sharp(fixtures.inputJpg)
.resize(320, 240)
@@ -92,6 +159,24 @@ describe('Rotation', function () {
});
});
it('Rotate by 30 degrees, rectangular output ignoring aspect ratio', function (done) {
sharp(fixtures.inputJpg)
.resize(320, 240)
.ignoreAspectRatio()
.rotate(30)
.toBuffer(function (err, data, info) {
if (err) throw err;
assert.strictEqual(397, info.width);
assert.strictEqual(368, info.height);
sharp(data).metadata(function (err, metadata) {
if (err) throw err;
assert.strictEqual(397, metadata.width);
assert.strictEqual(368, metadata.height);
done();
});
});
});
it('Input image has Orientation EXIF tag but do not rotate output', function (done) {
sharp(fixtures.inputJpgWithExif)
.resize(320)
@@ -185,9 +270,9 @@ describe('Rotation', function () {
});
});
it('Rotate to an invalid angle, should fail', function () {
it('Rotate with a string argument, should fail', function () {
assert.throws(function () {
sharp(fixtures.inputJpg).rotate(1);
sharp(fixtures.inputJpg).rotate('not-a-number');
});
});