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Allow xres and yres to be set for TIFF output (#828)

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This commit is contained in:
Yves Bos
2017-06-03 17:52:09 +08:00
committed by Lovell Fuller
parent 9f20037dad
commit d8765f955d
5 changed files with 78 additions and 2 deletions
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47
test/unit/io.js
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@@ -933,6 +933,53 @@ describe('Input/output', function () {
});
});
it('TIFF setting xres and yres on file', function (done) {
const res = 1000.0; // inputTiff has a dpi of 300 (res*2.54)
sharp(fixtures.inputTiff)
.tiff({
xres: (res),
yres: (res)
})
.toFile(fixtures.outputTiff, (err, info) => {
if (err) throw err;
assert.strictEqual('tiff', info.format);
sharp(fixtures.outputTiff).metadata(function (err, metadata) {
if (err) throw err;
assert.strictEqual(metadata.density, res * 2.54); // convert to dpi
fs.unlink(fixtures.outputTiff, done);
});
});
});
it('TIFF setting xres and yres on buffer', function (done) {
const res = 1000.0; // inputTiff has a dpi of 300 (res*2.54)
sharp(fixtures.inputTiff)
.tiff({
xres: (res),
yres: (res)
})
.toBuffer(function (err, data, info) {
if (err) throw err;
sharp(data).metadata(function (err, metadata) {
if (err) throw err;
assert.strictEqual(metadata.density, res * 2.54); // convert to dpi
done();
});
});
});
it('TIFF invalid xres value should throw an error', function () {
assert.throws(function () {
sharp().tiff({ xres: '1000.0' });
});
});
it('TIFF invalid yres value should throw an error', function () {
assert.throws(function () {
sharp().tiff({ yres: '1000.0' });
});
});
it('TIFF lzw compression with horizontal predictor shrinks test file', function (done) {
const startSize = fs.statSync(fixtures.inputTiffUncompressed).size;
sharp(fixtures.inputTiffUncompressed)