Struct Ifd 

pub struct Ifd {
    pub index: usize,
    /* private fields */
}

A parsed Image File Directory (IFD).

Fields

index: usize

Index of this IFD in the chain (0-based).

Implementations

impl Ifd

pub fn tag(&self, code: u16) -> Option<&Tag>

Look up a tag by its code.

pub fn tags(&self) -> &[Tag]

Returns all tags in this IFD.

pub fn width(&self) -> u32

Image width in pixels.

pub fn height(&self) -> u32

Image height in pixels.

pub fn bits_per_sample(&self) -> Vec<u16>

Bits per sample for each channel.

pub fn compression(&self) -> u16

Compression scheme (1 = none, 5 = LZW, 8 = Deflate, …).

pub fn photometric_interpretation(&self) -> Option<u16>

Photometric interpretation.

pub fn samples_per_pixel(&self) -> u16

Number of samples (bands) per pixel.

pub fn is_tiled(&self) -> bool

Returns true if this IFD uses tiled layout.

pub fn tile_width(&self) -> Option<u32>

Tile width (only for tiled IFDs).

pub fn tile_height(&self) -> Option<u32>

Tile height (only for tiled IFDs).

pub fn rows_per_strip(&self) -> Option<u32>

Rows per strip. Defaults to the image height when not present.

pub fn sample_format(&self) -> Vec<u16>

Sample format for each channel.

pub fn planar_configuration(&self) -> u16

Planar configuration. Defaults to chunky (1).

pub fn predictor(&self) -> u16

Predictor. Defaults to no predictor (1).

pub fn strip_offsets(&self) -> Option<Vec<u64>>

Strip offsets as normalized u64s.

pub fn strip_byte_counts(&self) -> Option<Vec<u64>>

Strip byte counts as normalized u64s.

pub fn tile_offsets(&self) -> Option<Vec<u64>>

Tile offsets as normalized u64s.

pub fn tile_byte_counts(&self) -> Option<Vec<u64>>

Tile byte counts as normalized u64s.

pub fn raster_layout(&self) -> Result<RasterLayout>

Normalize and validate the raster layout for typed reads.

Trait Implementations

impl Clone for Ifd

fn clone(&self) -> Ifd

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Ifd

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

Formats the value using the given formatter.