fix: don't strip ICC from exif (#735)

* fix: don't strip ICC from exif

Signed-off-by: ispik <ispik@ispik.dev>

* fix: refactor ICC profile handling in image processing

Signed-off-by: ispik <ispik@ispik.dev>

---------

Signed-off-by: ispik <ispik@ispik.dev>

crates/services/autumn/src/utils.rs

@@ -0,0 +1,31 @@
+/// Convert image to sRGB using the provided ICC profile.
+/// Returns the converted image, or the original if conversion fails.
+pub fn apply_icc_profile(image: image::DynamicImage, icc: &[u8]) -> image::DynamicImage {
+    let Ok(src_profile) = lcms2::Profile::new_icc(icc) else {
+        return image;
+    };
+    let dst_profile = lcms2::Profile::new_srgb();
+    let format = if image.color().has_alpha() {
+        lcms2::PixelFormat::RGBA_8
+    } else {
+        lcms2::PixelFormat::RGB_8
+    };
+    let Ok(t) = lcms2::Transform::new(
+        &src_profile,
+        format,
+        &dst_profile,
+        format,
+        lcms2::Intent::Perceptual,
+    ) else {
+        return image;
+    };
+    if image.color().has_alpha() {
+        let mut rgba_image = image.into_rgba8();
+        t.transform_in_place(rgba_image.as_mut());
+        image::DynamicImage::ImageRgba8(rgba_image)
+    } else {
+        let mut rgb_image = image.into_rgb8();
+        t.transform_in_place(rgb_image.as_mut());
+        image::DynamicImage::ImageRgb8(rgb_image)
+    }
+}