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Expose TIFF compression and predictor options (#738)

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This commit is contained in:
Kristo Jorgenson
2017-03-29 07:12:04 -04:00
committed by Lovell Fuller
parent 5e015cc3ca
commit f8e72f443d
7 changed files with 162 additions and 1 deletions
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124
test/unit/io.js
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@@ -861,6 +861,130 @@ describe('Input/output', function () {
});
});
it('TIFF lzw compression with horizontal predictor shrinks test file', function (done) {
const startSize = fs.statSync(fixtures.inputTiffUncompressed).size;
sharp(fixtures.inputTiffUncompressed)
.tiff({
compression: 'lzw',
force: true,
// note: lzw compression is imperfect and sometimes
// generates larger files, as it does with this input
// if no predictor is used.
predictor: 'horizontal'
})
.toFile(fixtures.outputTiff, (err, info) => {
if (err) throw err;
assert.strictEqual('tiff', info.format);
assert(info.size < startSize);
fs.unlinkSync(fixtures.outputTiff);
done();
});
});
it('TIFF deflate compression with hoizontal predictor shrinks test file', function (done) {
const startSize = fs.statSync(fixtures.inputTiffUncompressed).size;
sharp(fixtures.inputTiffUncompressed)
.tiff({
compression: 'deflate',
force: true,
predictor: 'horizontal'
})
.toFile(fixtures.outputTiff, (err, info) => {
if (err) throw err;
assert.strictEqual('tiff', info.format);
assert(info.size < startSize);
fs.unlinkSync(fixtures.outputTiff);
done();
});
});
it('TIFF deflate compression without predictor shrinks test file', function (done) {
const startSize = fs.statSync(fixtures.inputTiffUncompressed).size;
sharp(fixtures.inputTiffUncompressed)
.tiff({
compression: 'deflate',
force: true,
predictor: 'none'
})
.toFile(fixtures.outputTiff, (err, info) => {
if (err) throw err;
assert.strictEqual('tiff', info.format);
assert(info.size < startSize);
fs.unlinkSync(fixtures.outputTiff);
done();
});
});
it('TIFF jpeg compression shrinks test file', function (done) {
const startSize = fs.statSync(fixtures.inputTiffUncompressed).size;
sharp(fixtures.inputTiffUncompressed)
.tiff({
compression: 'jpeg',
force: true
})
.toFile(fixtures.outputTiff, (err, info) => {
if (err) throw err;
assert.strictEqual('tiff', info.format);
assert(info.size < startSize);
fs.unlinkSync(fixtures.outputTiff);
done();
});
});
it('TIFF none compression does not throw error', function () {
assert.doesNotThrow(function () {
sharp().tiff({ compression: 'none' });
});
});
it('TIFF lzw compression does not throw error', function () {
assert.doesNotThrow(function () {
sharp().tiff({ compression: 'lzw' });
});
});
it('TIFF deflate compression does not throw error', function () {
assert.doesNotThrow(function () {
sharp().tiff({ compression: 'deflate' });
});
});
it('TIFF invalid compression option throws', function () {
assert.throws(function () {
sharp().tiff({ compression: 0 });
});
});
it('TIFF invalid compression option throws', function () {
assert.throws(function () {
sharp().tiff({ compression: 'a' });
});
});
it('TIFF invalid predictor option throws', function () {
assert.throws(function () {
sharp().tiff({ predictor: 'a' });
});
});
it('TIFF horizontal predictor does not throw error', function () {
assert.doesNotThrow(function () {
sharp().tiff({ predictor: 'horizontal' });
});
});
it('TIFF float predictor does not throw error', function () {
assert.doesNotThrow(function () {
sharp().tiff({ predictor: 'float' });
});
});
it('TIFF none predictor does not throw error', function () {
assert.doesNotThrow(function () {
sharp().tiff({ predictor: 'none' });
});
});
it('Input and output formats match when not forcing', function (done) {
sharp(fixtures.inputJpg)
.resize(320, 240)