Enum ImageFormat 

pub enum ImageFormat {
    Png(PngCompression),
    Ppm,
    Bmp,
    Jpeg {
        quality: u8,
    },
}

The file format Pixmap::encode writes. PNG keeps every channel and carries its compression level; PPM and BMP are a header plus one packing pass over the pixels, dropping alpha; JPEG is lossy at its quality.

Variants

Png(PngCompression)

PNG, RGBA 8-bit, at the given compression level.

Ppm

Binary PPM (P6): RGB rows, top-down, no padding.

Bmp

Windows BMP: 24-bit BGR rows, bottom-up, padded to four bytes.

Jpeg

Baseline JPEG, 4:4:4, at quality 1 to 100 (clamped); alpha dropped.

Fields

quality: u8

The conventional quality knob: 50 uses the standard tables as printed, 100 keeps every coefficient, lower values coarsen.

Implementations

impl ImageFormat

pub const DEFAULT_JPEG_QUALITY: u8 = 90

The JPEG quality ImageFormat::from_name hands out.

pub fn from_name(name: &str) -> Option<ImageFormat>

The format a file extension or a Python string names, case insensitively: png (at the default compression level), ppm, bmp, or jpeg / jpg (at ImageFormat::DEFAULT_JPEG_QUALITY).

Trait Implementations

impl Clone for ImageFormat

fn clone(&self) -> ImageFormat

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for ImageFormat

impl Debug for ImageFormat

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

Formats the value using the given formatter.

impl Eq for ImageFormat

impl PartialEq for ImageFormat

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for ImageFormat