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a framing slot renders the original, not a rung

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The preview asked `derived/` for a 640-wide rung and drew it about 1900 pixels wide — stretched three
times over, which reads as a poor photograph rather than as the wrong file. Raising the rung only moves
the problem: the box is most of a panel wide and can be zoomed on top of that, so any rung chosen in
advance is chosen wrong, and the widest one available is whatever the ladder happens to hold.

The original has every pixel there is. It is also, often, a HEIC that no browser can decode — which is
what av-club is for, and the platform already renders those for its own file browser through exactly
this path.

So there is a `/original/*` route: it resolves a path inside `originals/`, forwards to av-club's
`/v1/render` with a width, and streams back something a browser can draw. It decodes nothing itself.
That is the standing rule and the reason there is no image library in this plugin.

Not cached on disk, like the platform's own /render and for the same reason: a full-size render is
large, looked at once, and keyed on a width the panel chose. Caching it would fill a disk to make the
second look at one photograph faster.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
This commit is contained in:
pastilhas
2026-08-31 00:02:24 +01:00
co-authored by Claude Opus 5
parent fe51c70f70
commit 84336b8af5
3 changed files with 102 additions and 3 deletions
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web/thumbnail.ts
+17 -1
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@@ -15,7 +15,7 @@ import { getHeaders } from 'hooks/useClient';
* MediaField. Three copies of a URL shape is three places to be wrong about the rung when the ladder
* changes — which it did, four times in a day.
*/
export const thumbUrl = (path: string, width: 256 | 320 | 480 | 640 = 320): string => {
export const thumbUrl = (path: string, width: 256 | 320 | 480 | 640 | 960 | 1280 = 320): string => {
const token = getHeaders()['Authorization']?.replace('Bearer ', '') ?? '';
const encoded = path.split('/').map(encodeURIComponent).join('/');
return `/api/fofos-admin/derived/${encoded}/${width}.webp?token=${encodeURIComponent(token)}`;
@@ -32,3 +32,19 @@ export const posterUrl = (path: string): string => {
const encoded = path.split('/').map(encodeURIComponent).join('/');
return `/api/fofos-admin/derived/${encoded}/poster-512.webp?token=${encodeURIComponent(token)}`;
};
/**
* An ORIGINAL, rendered at a width, for something drawn at size.
*
* The derived ladder is right for a row thumbnail and wrong for a framing slot: that is most of a panel
* wide and can be zoomed on top of it, so a rung chosen in advance is a rung that is wrong. This asks
* for the width the slot actually draws, from the file that has every pixel.
*
* `width` is a hint the server clamps to 256..4096. Ask for what will be drawn — twice it, on a screen
* that is worth it — rather than a round number.
*/
export const originalUrl = (path: string, width: number): string => {
const token = getHeaders()['Authorization']?.replace('Bearer ', '') ?? '';
const encoded = path.split('/').map(encodeURIComponent).join('/');
return `/api/fofos-admin/original/${encoded}?width=${Math.round(width)}&token=${encodeURIComponent(token)}`;
};