Struct lofty::PictureInformation

pub struct PictureInformation {
    pub width: u32,
    pub height: u32,
    pub color_depth: u32,
    pub num_colors: u32,
}

Information about a Picture

This information is necessary for FLAC’s METADATA_BLOCK_PICTURE. See Picture::as_flac_bytes for more information.

Fields

width: u32

The picture’s width in pixels

height: u32

The picture’s height in pixels

color_depth: u32

The picture’s color depth in bits per pixel

num_colors: u32

The number of colors used

Implementations

impl PictureInformation

pub fn from_picture(picture: &Picture) -> Result<Self>

Attempt to extract PictureInformation from a Picture

NOTE: This only supports PNG and JPEG images. If another image is provided, the PictureInformation will be zeroed out.

Errors

• picture.data is less than 8 bytes in length
• See PictureInformation::from_png and PictureInformation::from_jpeg

pub fn from_png(data: &[u8]) -> Result<Self>

Attempt to extract PictureInformation from a PNG

Errors

• reader is not a valid PNG

pub fn from_jpeg(data: &[u8]) -> Result<Self>

Attempt to extract PictureInformation from a JPEG

Errors

• reader is not a JPEG image
• reader does not contain a SOFn frame

Trait Implementations

impl Clone for PictureInformation

fn clone(&self) -> PictureInformation

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for PictureInformation

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for PictureInformation

fn default() -> PictureInformation

Returns the “default value” for a type.

impl Hash for PictureInformation

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for PictureInformation

fn eq(&self, other: &PictureInformation) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Copy for PictureInformation

impl Eq for PictureInformation

impl StructuralEq for PictureInformation

impl StructuralPartialEq for PictureInformation