Enum gsk4::TransformCategory

``````#[non_exhaustive]
pub enum TransformCategory {
Unknown,
Any,
_3d,
_2d,
_2dAffine,
_2dTranslate,
Identity,
// some variants omitted
}``````
Expand description

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)

This enum is marked as 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

Returns a copy of the value. Read more

Performs copy-assignment from `source`. Read more

Formats the value using the given formatter. Read more

Formats the value using the given formatter. Read more

Value type checker.

Get the contained value from a `Value`. Read more

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This method returns an `Ordering` between `self` and `other`. Read more

Compares and returns the maximum of two values. Read more

Compares and returns the minimum of two values. Read more

Restrict a value to a certain interval. Read more

This method tests for `self` and `other` values to be equal, and is used by `==`. Read more

This method tests for `!=`.

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

This method tests less than (for `self` and `other`) and is used by the `<` operator. Read more

This method tests less than or equal to (for `self` and `other`) and is used by the `<=` operator. Read more

This method tests greater than (for `self` and `other`) and is used by the `>` operator. Read more

This method tests greater than or equal to (for `self` and `other`) and is used by the `>=` operator. Read more

Returns the type identifier of `Self`.

Convert a value to a `Value`.

Returns the type identifer of `self`. Read more

Type to get the `Type` from. Read more

Blanket Implementations

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Immutably borrows from an owned value. Read more

Mutably borrows from an owned value. Read more

Returns the argument unchanged.

Calls `U::from(self)`.

That is, this conversion is whatever the implementation of `From<T> for U` chooses to do.

Ensures that the type has been registered with the type system.

The resulting type after obtaining ownership.

Creates owned data from borrowed data, usually by cloning. Read more

Uses borrowed data to replace owned data, usually by cloning. Read more

Returns a `SendValue` clone of `self`.

Converts the given value to a `String`. Read more

The type returned in the event of a conversion error.

Performs the conversion.

The type returned in the event of a conversion error.

Performs the conversion.