Expose delay/loop metadata for animated images #1905

test/fixtures/index.js

@@ -102,6 +102,7 @@ module.exports = {
   inputGif: getPath('Crash_test.gif'), // http://upload.wikimedia.org/wikipedia/commons/e/e3/Crash_test.gif
   inputGifGreyPlusAlpha: getPath('grey-plus-alpha.gif'), // http://i.imgur.com/gZ5jlmE.gif
   inputGifAnimated: getPath('rotating-squares.gif'), // CC0 https://loading.io/spinner/blocks/-rotating-squares-preloader-gif
+  inputGifAnimatedLoop3: getPath('animated-loop-3.gif'), // CC-BY-SA-4.0 Petrus3743 https://commons.wikimedia.org/wiki/File:01-Goldener_Schnitt_Formel-Animation.gif
   inputSvg: getPath('check.svg'), // http://dev.w3.org/SVG/tools/svgweb/samples/svg-files/check.svg
   inputSvgWithEmbeddedImages: getPath('struct-image-04-t.svg'), // https://dev.w3.org/SVG/profiles/1.2T/test/svg/struct-image-04-t.svg
 

test/unit/metadata.js

@@ -232,6 +232,55 @@ describe('Image metadata', function () {
       done();
     });
   });
+
+  it('Animated GIF', () =>
+    sharp(fixtures.inputGifAnimated)
+      .metadata()
+      .then(({
+        format, width, height, space, channels, depth,
+        isProgressive, pages, pageHeight, loop, delay,
+        hasProfile, hasAlpha
+      }) => {
+        assert.strictEqual(format, 'gif');
+        assert.strictEqual(width, 80);
+        assert.strictEqual(height, 80);
+        assert.strictEqual(space, 'srgb');
+        assert.strictEqual(channels, 4);
+        assert.strictEqual(depth, 'uchar');
+        assert.strictEqual(isProgressive, false);
+        assert.strictEqual(pages, 30);
+        assert.strictEqual(pageHeight, 80);
+        assert.strictEqual(loop, 0);
+        assert.deepStrictEqual(delay, Array(30).fill(30));
+        assert.strictEqual(hasProfile, false);
+        assert.strictEqual(hasAlpha, true);
+      })
+  );
+
+  it('Animated GIF with limited looping', () =>
+    sharp(fixtures.inputGifAnimatedLoop3)
+      .metadata()
+      .then(({
+        format, width, height, space, channels, depth,
+        isProgressive, pages, pageHeight, loop, delay,
+        hasProfile, hasAlpha
+      }) => {
+        assert.strictEqual(format, 'gif');
+        assert.strictEqual(width, 370);
+        assert.strictEqual(height, 285);
+        assert.strictEqual(space, 'srgb');
+        assert.strictEqual(channels, 4);
+        assert.strictEqual(depth, 'uchar');
+        assert.strictEqual(isProgressive, false);
+        assert.strictEqual(pages, 10);
+        assert.strictEqual(pageHeight, 285);
+        assert.strictEqual(loop, 3);
+        assert.deepStrictEqual(delay, [...Array(9).fill(3000), 15000]);
+        assert.strictEqual(hasProfile, false);
+        assert.strictEqual(hasAlpha, true);
+      })
+  );
+
   it('vips', () =>
     sharp(fixtures.inputV)
       .metadata()