Upgrade to libvips 8.10.6-alpha1

- Prebuilt binaries now include mozjpeg and libimagequant (BSD 2-Clause)
- Prebuilt binaries limit AVIF support to the most common 8-bit depth
- Add `mozjpeg` option to `jpeg` method, sets mozjpeg defaults
- Reduce the default PNG `compressionLevel` to the more commonly used 6

test/unit/jpeg.js

@@ -290,4 +290,24 @@ describe('JPEG', function () {
           });
       });
   });
+
+  it('Can use mozjpeg defaults', async () => {
+    const withoutData = await sharp(fixtures.inputJpg)
+      .resize(32, 24)
+      .jpeg({ mozjpeg: false })
+      .toBuffer();
+    const withoutMeta = await sharp(withoutData).metadata();
+    assert.strictEqual(false, withoutMeta.isProgressive);
+
+    const withData = await sharp(fixtures.inputJpg)
+      .resize(32, 24)
+      .jpeg({ mozjpeg: true })
+      .toBuffer();
+    const withMeta = await sharp(withData).metadata();
+    assert.strictEqual(true, withMeta.isProgressive);
+  });
+
+  it('Invalid mozjpeg value throws error', () => {
+    assert.throws(() => sharp().jpeg({ mozjpeg: 'fail' }));
+  });
 });

test/unit/png.js

@@ -19,7 +19,7 @@ describe('PNG', function () {
     });
   });
 
-  it('default compressionLevel generates smaller file than compressionLevel=6', function (done) {
+  it('default compressionLevel generates smaller file than compressionLevel=0', function (done) {
     // First generate with default compressionLevel
     sharp(fixtures.inputPng)
       .resize(320, 240)
@@ -31,7 +31,7 @@ describe('PNG', function () {
         // Then generate with compressionLevel=6
         sharp(fixtures.inputPng)
           .resize(320, 240)
-          .png({ compressionLevel: 6 })
+          .png({ compressionLevel: 0 })
           .toBuffer(function (err, largerData, largerInfo) {
             if (err) throw err;
             assert.strictEqual(true, largerData.length > 0);

test/unit/tiff.js

@@ -279,7 +279,7 @@ describe('TIFF', function () {
       });
   });
 
-  it('TIFF deflate compression of integral input with float predictor increases file size', function (done) {
+  it('TIFF deflate compression with float predictor shrinks test file', function (done) {
     const startSize = fs.statSync(fixtures.inputTiffUncompressed).size;
     sharp(fixtures.inputTiffUncompressed)
       .tiff({
@@ -289,7 +289,7 @@ describe('TIFF', function () {
       .toFile(outputTiff, (err, info) => {
         if (err) throw err;
         assert.strictEqual('tiff', info.format);
-        assert(info.size > startSize);
+        assert(startSize > info.size);
         rimraf(outputTiff, done);
       });
   });