impl ImageFormat

fn from_extension<S>(ext: S) -> Option<Self>
where
    S: AsRef<OsStr>,

Return the image format specified by a path's file extension.

Example

use image::ImageFormat;

let format = ImageFormat::from_extension("jpg");
assert_eq!(format, Some(ImageFormat::Jpeg));

fn from_path<P>(path: P) -> ImageResult<Self>
where
    P: AsRef<Path>,

Return the image format specified by the path's file extension.

Example

use image::ImageFormat;

let format = ImageFormat::from_path("images/ferris.png")?;
assert_eq!(format, ImageFormat::Png);

# Ok::<(), image::error::ImageError>(())

fn from_mime_type<M>(mime_type: M) -> Option<Self>
where
    M: AsRef<str>,

Return the image format specified by a MIME type.

Example

use image::ImageFormat;

let format = ImageFormat::from_mime_type("image/png").unwrap();
assert_eq!(format, ImageFormat::Png);

fn to_mime_type(&self) -> &'static str

Return the MIME type for this image format or "application/octet-stream" if no MIME type exists for the format.

Some notes on a few of the MIME types:

• The portable anymap format has a separate MIME type for the pixmap, graymap and bitmap formats, but this method returns the general "image/x-portable-anymap" MIME type.
• The Targa format has two common MIME types, "image/x-targa" and "image/x-tga"; this method returns "image/x-targa" for that format.
• The QOI MIME type is still a work in progress. This method returns "image/x-qoi" for that format.

Example

use image::ImageFormat;

let mime_type = ImageFormat::Png.to_mime_type();
assert_eq!(mime_type, "image/png");

fn can_read(&self) -> bool

Return if the ImageFormat can be decoded by the lib.

fn can_write(&self) -> bool

Return if the ImageFormat can be encoded by the lib.

fn extensions_str(self) -> &'static [&'static str]

Return a list of applicable extensions for this format.

All currently recognized image formats specify at least on extension but for future compatibility you should not rely on this fact. The list may be empty if the format has no recognized file representation, for example in case it is used as a purely transient memory format.

The method name extensions remains reserved for introducing another method in the future that yields a slice of OsStr which is blocked by several features of const evaluation.

fn reading_enabled(&self) -> bool

Return the ImageFormats which are enabled for reading.

fn writing_enabled(&self) -> bool

Return the ImageFormats which are enabled for writing.

fn all() -> impl Iterator<Item = ImageFormat>

Return all ImageFormats