Enum png::ColorType

#[repr(u8)]
pub enum ColorType {
    Grayscale = 0,
    Rgb = 2,
    Indexed = 3,
    GrayscaleAlpha = 4,
    Rgba = 6,
}

Describes how a pixel is encoded.

Variants

Grayscale = 0

1 grayscale sample.

Rgb = 2

1 red sample, 1 green sample, 1 blue sample.

Indexed = 3

1 sample for the palette index.

GrayscaleAlpha = 4

1 grayscale sample, then 1 alpha sample.

Rgba = 6

1 red sample, 1 green sample, 1 blue sample, and finally, 1 alpha sample.

Implementations

impl ColorType

pub fn samples(self) -> usize

Returns the number of samples used per pixel encoded in this way.

pub(crate) fn samples_u8(self) -> u8

pub fn from_u8(n: u8) -> Option<ColorType>

u8 -> Self. Temporary solution until Rust provides a canonical one.

pub(crate) fn checked_raw_row_length( self, depth: BitDepth, width: u32, ) -> Option<usize>

pub(crate) fn raw_row_length_from_width( self, depth: BitDepth, width: u32, ) -> usize

pub(crate) fn is_combination_invalid(self, bit_depth: BitDepth) -> bool

Trait Implementations

impl Clone for ColorType

fn clone(&self) -> ColorType

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for ColorType

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

Formats the value using the given formatter.

impl PartialEq for ColorType

fn eq(&self, other: &ColorType) -> 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 ColorType

impl Eq for ColorType

impl StructuralPartialEq for ColorType