Enum TransformCategory

#[non_exhaustive]
pub enum TransformCategory {
    Unknown,
    Any,
    _3d,
    _2d,
    _2dAffine,
    _2dTranslate,
    Identity,
}

The categories of matrices relevant for GSK and GTK.

Note that any category includes matrices of all later categories. So if you want to for example check if a matrix is a 2D matrix, category >= GSK_TRANSFORM_CATEGORY_2D is the way to do this.

Also keep in mind that rounding errors may cause matrices to not conform to their categories. Otherwise, matrix operations done via multiplication will not worsen categories. So for the matrix multiplication C = A * B, category(C) = MIN (category(A), category(B)).

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

Unknown

The category of the matrix has not been determined.

Any

Analyzing the matrix concluded that it does not fit in any other category.

_3d

The matrix is a 3D matrix. This means that the w column (the last column) has the values (0, 0, 0, 1).

_2d

The matrix is a 2D matrix. This is equivalent to graphene_matrix_is_2d() returning true. In particular, this means that Cairo can deal with the matrix.

_2dAffine

The matrix is a combination of 2D scale and 2D translation operations. In particular, this means that any rectangle can be transformed exactly using this matrix.

_2dTranslate

The matrix is a 2D translation.

Identity

The matrix is the identity matrix.

Trait Implementations

impl Clone for TransformCategory

fn clone(&self) -> TransformCategory

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for TransformCategory

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

Formats the value using the given formatter.

impl From<TransformCategory> for Value

fn from(v: TransformCategory) -> Self

Converts to this type from the input type.

impl<'a> FromValue<'a> for TransformCategory

type Checker = GenericValueTypeChecker<TransformCategory>

Value type checker.

unsafe fn from_value(value: &'a Value) -> Self

Get the contained value from a Value.

impl HasParamSpec for TransformCategory

type ParamSpec = ParamSpecEnum

type SetValue = TransformCategory

Preferred value to be used as setter for the associated ParamSpec.

type BuilderFn = fn(_: &str, _: TransformCategory) -> ParamSpecEnumBuilder<'_, TransformCategory>

fn param_spec_builder() -> Self::BuilderFn

impl Hash for TransformCategory

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 Ord for TransformCategory

fn cmp(&self, other: &TransformCategory) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl PartialEq for TransformCategory

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

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

This method returns an ordering between self and other values if one exists.

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 StaticType for TransformCategory

fn static_type() -> Type

Returns the type identifier of Self.

impl ToValue for TransformCategory

fn to_value(&self) -> Value

Convert a value to a Value.

fn value_type(&self) -> Type

Returns the type identifier of self.

impl ValueType for TransformCategory

type Type = TransformCategory

Type to get the Type from.

impl Copy for TransformCategory

impl Eq for TransformCategory

impl StructuralPartialEq for TransformCategory