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Improve handling of animated images, add support for AVIF animations (#30932)

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* Only set MSC4230 is_animated flag if we are able to tell if the media is animated

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

* Set blob type correctly to not need to weave the mimetype around

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

* Use ImageDecoder to determine whether media is animated or not, adding support for AVIF and other formats

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

* Fix test

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

* Iterate

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

* Add test

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

* Fix test

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

---------

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>
This commit is contained in:
Michael Telatynski
2025-10-03 13:29:10 +00:00
committed by GitHub
parent 5f084c28c3
commit e83ddbc98a
6 changed files with 115 additions and 33 deletions
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test/unit-tests/Image-test.ts
+29 -16
View File
@@ -32,42 +32,55 @@ describe("Image", () => {
describe("blobIsAnimated", () => {
it("Animated GIF", async () => {
const img = new Blob([fs.readFileSync(path.resolve(__dirname, "images", "animated-logo.gif"))]);
expect(await blobIsAnimated("image/gif", img)).toBeTruthy();
const img = new Blob([fs.readFileSync(path.resolve(__dirname, "images", "animated-logo.gif"))], {
type: "image/gif",
});
expect(await blobIsAnimated(img)).toBeTruthy();
});
it("Static GIF", async () => {
const img = new Blob([fs.readFileSync(path.resolve(__dirname, "images", "static-logo.gif"))]);
expect(await blobIsAnimated("image/gif", img)).toBeFalsy();
const img = new Blob([fs.readFileSync(path.resolve(__dirname, "images", "static-logo.gif"))], {
type: "image/gif",
});
expect(await blobIsAnimated(img)).toBeFalsy();
});
it("Animated WEBP", async () => {
const img = new Blob([fs.readFileSync(path.resolve(__dirname, "images", "animated-logo.webp"))]);
expect(await blobIsAnimated("image/webp", img)).toBeTruthy();
const img = new Blob([fs.readFileSync(path.resolve(__dirname, "images", "animated-logo.webp"))], {
type: "image/webp",
});
expect(await blobIsAnimated(img)).toBeTruthy();
});
it("Static WEBP", async () => {
const img = new Blob([fs.readFileSync(path.resolve(__dirname, "images", "static-logo.webp"))]);
expect(await blobIsAnimated("image/webp", img)).toBeFalsy();
const img = new Blob([fs.readFileSync(path.resolve(__dirname, "images", "static-logo.webp"))], {
type: "image/webp",
});
expect(await blobIsAnimated(img)).toBeFalsy();
});
it("Static WEBP in extended file format", async () => {
const img = new Blob([
fs.readFileSync(path.resolve(__dirname, "images", "static-logo-extended-file-format.webp")),
]);
expect(await blobIsAnimated("image/webp", img)).toBeFalsy();
const img = new Blob(
[fs.readFileSync(path.resolve(__dirname, "images", "static-logo-extended-file-format.webp"))],
{ type: "image/webp" },
);
expect(await blobIsAnimated(img)).toBeFalsy();
});
it("Animated PNG", async () => {
const img = new Blob([fs.readFileSync(path.resolve(__dirname, "images", "animated-logo.apng"))]);
expect(await blobIsAnimated("image/png", img)).toBeTruthy();
expect(await blobIsAnimated("image/apng", img)).toBeTruthy();
const pngBlob = img.slice(0, img.size, "image/png");
const apngBlob = img.slice(0, img.size, "image/apng");
expect(await blobIsAnimated(pngBlob)).toBeTruthy();
expect(await blobIsAnimated(apngBlob)).toBeTruthy();
});
it("Static PNG", async () => {
const img = new Blob([fs.readFileSync(path.resolve(__dirname, "images", "static-logo.png"))]);
expect(await blobIsAnimated("image/png", img)).toBeFalsy();
expect(await blobIsAnimated("image/apng", img)).toBeFalsy();
const pngBlob = img.slice(0, img.size, "image/png");
const apngBlob = img.slice(0, img.size, "image/apng");
expect(await blobIsAnimated(pngBlob)).toBeFalsy();
expect(await blobIsAnimated(apngBlob)).toBeFalsy();
});
});
});