Enum NormalForm

pub enum NormalForm {
    Unaliased,
    PixelPacked,
    ImagePacked,
    RowMajorPacked,
    ColumnMajorPacked,
}

Different normal forms of buffers.

A normal form is an unaliased buffer with some additional constraints. The ÌmageBuffer uses row major form with packed samples.

Variants

Unaliased

No pixel aliases another.

Unaliased also guarantees that all index calculations in the image bounds using dim_index*dim_stride (such as x*width_stride + y*height_stride) do not overflow.

PixelPacked

At least pixels are packed.

Images of these types can wrap [T]-slices into the standard color types. This is a precondition for GenericImage which requires by-reference access to pixels.

ImagePacked

All samples are packed.

This is orthogonal to PixelPacked. It requires that there are no holes in the image but it is not necessary that the pixel samples themselves are adjacent. An example of this behaviour is a planar image layout.

RowMajorPacked

The samples are in row-major form and all samples are packed.

In addition to PixelPacked and ImagePacked this also asserts that the pixel matrix is in row-major form.

ColumnMajorPacked

The samples are in column-major form and all samples are packed.

In addition to PixelPacked and ImagePacked this also asserts that the pixel matrix is in column-major form.

Trait Implementations

impl Clone for NormalForm

fn clone(&self) -> NormalForm

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for NormalForm

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

Formats the value using the given formatter.

impl Hash for NormalForm

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

where __H: Hasher,

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 NormalForm

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

Tests for self and other values to be equal, and is used by ==.

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

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

impl PartialOrd for NormalForm

fn partial_cmp(&self, other: &NormalForm) -> Option<Ordering>

Compares the logical preconditions.

a < b if the normal form a has less preconditions than b.

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

Tests less than (for self and other) and is used by the < operator.

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

Tests less than or equal to (for self and other) and is used by the <= operator.

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

Tests greater than (for self and other) and is used by the > operator.

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

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl Copy for NormalForm

impl Eq for NormalForm

impl StructuralPartialEq for NormalForm