mirror of
https://github.com/snapotter-hq/SnapOtter.git
synced 2026-08-03 07:46:42 +02:00
Siddharth Kumar Sah
e5086ada6e
Extract EXIF auto-orientation logic into a shared auto-orient module used by both single-tool and batch routes. This ensures camera photos display correctly after processing regardless of entry point. Also expands e2e and integration tests significantly.
26 lines
876 B
TypeScript
26 lines
876 B
TypeScript
import sharp from "sharp";
|
|
|
|
/**
|
|
* Auto-orient an image buffer based on EXIF orientation metadata.
|
|
*
|
|
* Camera photos embed an EXIF Orientation tag (values 2-8) that viewers
|
|
* respect when displaying. Sharp strips this tag during processing but
|
|
* does NOT auto-rotate the pixels, so the output appears rotated.
|
|
*
|
|
* This function physically rotates the pixels to match the EXIF orientation,
|
|
* then strips the tag so downstream processing produces correct results.
|
|
*
|
|
* Returns the original buffer unchanged if no rotation is needed.
|
|
*/
|
|
export async function autoOrient(buffer: Buffer): Promise<Buffer> {
|
|
try {
|
|
const meta = await sharp(buffer).metadata();
|
|
if (meta.orientation && meta.orientation > 1) {
|
|
return await sharp(buffer).rotate().toBuffer();
|
|
}
|
|
} catch {
|
|
// If metadata reading fails, return the original buffer
|
|
}
|
|
return buffer;
|
|
}
|