Merge pull request #2346 from Shnatsel/orientation-doc-comment

Update apply_orientation doc comment to use `.orientation()`

Cargo.toml

@@ -62,7 +62,6 @@ num-complex = "0.4"
 glob = "0.3"
 quickcheck = "1"
 criterion = "0.5.0"
-kamadak-exif = "0.5.5"
 
 [features]
 default = ["rayon", "default-formats"]

src/dynimage.rs

@@ -940,25 +940,12 @@ impl DynamicImage {
     ///
     /// ```
     /// # fn only_check_if_this_compiles() -> Result<(), Box<dyn std::error::Error>> {
-    /// # use image::{Orientation, DynamicImage, ImageReader, ImageDecoder};
-    /// use exif::{In, Tag}; // third-party crate `kamadak_exif` is needed to parse Exif chunk
+    /// use image::{Orientation, DynamicImage, ImageReader, ImageDecoder};
     ///
     /// let mut decoder = ImageReader::open("file.jpg")?.into_decoder()?;
-    /// let raw_exif = decoder.exif_metadata();
+    /// let orientation = decoder.orientation()?;
     /// let mut image = DynamicImage::from_decoder(decoder)?;
-    ///
-    /// // Parse Exif chunk (if present) and apply the orientation
-    /// if let Ok(Some(raw_exif)) = raw_exif {
-    ///     let reader = exif::Reader::new();
-    ///     let exif = reader.read_raw(raw_exif)?;
-    ///     if let Some(orientation) = exif.get_field(Tag::Orientation, In::PRIMARY) {
-    ///        if let Some(value) = orientation.value.get_uint(0) {
-    ///            if let Some(orientation) = Orientation::from_exif(value as u8) {
-    ///                image.apply_orientation(orientation);
-    ///            }
-    ///        }
-    ///    }
-    /// }
+    /// image.apply_orientation(orientation);
     /// # Ok(())
     /// # }
     /// ```

src/metadata.rs

@@ -5,7 +5,7 @@ use byteorder_lite::{BigEndian, LittleEndian, ReadBytesExt};
 /// Describes the transformations to be applied to the image.
 /// Compatible with [Exif orientation](https://web.archive.org/web/20200412005226/https://www.impulseadventure.com/photo/exif-orientation.html).
 ///
-/// Orientation is specified in the Exif metadata, and is often written by cameras.
+/// Orientation is specified in the file's metadata, and is often written by cameras.
 ///
 /// You can apply it to an image via [`DynamicImage::apply_orientation`](crate::DynamicImage::apply_orientation).
 #[derive(Copy, Clone, PartialEq, Eq, Hash, Debug)]