mirror of
https://github.com/go-gitea/gitea
synced 2024-11-18 08:04:25 +00:00
5e72526da4
Some images like MacOS screenshots contain [pHYs](http://www.libpng.org/pub/png/book/chapter11.html#png.ch11.div.8) data which we can use to downscale uploaded images so they render in the same dppx ratio in which they were taken. Before: <img width="584" alt="image" src="https://github.com/go-gitea/gitea/assets/115237/50979e3a-5d5a-40dc-a0a4-36eb6e28f14a"> After: <img width="329" alt="image" src="https://github.com/go-gitea/gitea/assets/115237/0690902a-f2fe-4c6b-97b3-6fdd67c21bad">
30 lines
1.5 KiB
JavaScript
30 lines
1.5 KiB
JavaScript
import {pngChunks, imageInfo} from './image.js';
|
|
|
|
const pngNoPhys = 'data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAAAAAA6fptVAAAADUlEQVQIHQECAP3/AAAAAgABzePRKwAAAABJRU5ErkJggg==';
|
|
const pngPhys = 'data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAIAAAD91JpzAAAACXBIWXMAABYlAAAWJQFJUiTwAAAAEElEQVQI12OQNZcAIgYIBQAL8gGxdzzM0A==';
|
|
const pngEmpty = 'data:image/png;base64,';
|
|
|
|
async function dataUriToBlob(datauri) {
|
|
return await (await globalThis.fetch(datauri)).blob();
|
|
}
|
|
|
|
test('pngChunks', async () => {
|
|
expect(await pngChunks(await dataUriToBlob(pngNoPhys))).toEqual([
|
|
{name: 'IHDR', data: new Uint8Array([0, 0, 0, 1, 0, 0, 0, 1, 8, 0, 0, 0, 0])},
|
|
{name: 'IDAT', data: new Uint8Array([8, 29, 1, 2, 0, 253, 255, 0, 0, 0, 2, 0, 1])},
|
|
{name: 'IEND', data: new Uint8Array([])},
|
|
]);
|
|
expect(await pngChunks(await dataUriToBlob(pngPhys))).toEqual([
|
|
{name: 'IHDR', data: new Uint8Array([0, 0, 0, 2, 0, 0, 0, 2, 8, 2, 0, 0, 0])},
|
|
{name: 'pHYs', data: new Uint8Array([0, 0, 22, 37, 0, 0, 22, 37, 1])},
|
|
{name: 'IDAT', data: new Uint8Array([8, 215, 99, 144, 53, 151, 0, 34, 6, 8, 5, 0, 11, 242, 1, 177])},
|
|
]);
|
|
expect(await pngChunks(await dataUriToBlob(pngEmpty))).toEqual([]);
|
|
});
|
|
|
|
test('imageInfo', async () => {
|
|
expect(await imageInfo(await dataUriToBlob(pngNoPhys))).toEqual({width: 1, dppx: 1});
|
|
expect(await imageInfo(await dataUriToBlob(pngPhys))).toEqual({width: 2, dppx: 2});
|
|
expect(await imageInfo(await dataUriToBlob(pngEmpty))).toEqual({width: 0, dppx: 1});
|
|
});
|