Struct Transform 

pub struct Transform {
    pub a: i64,
    pub b: i64,
    pub c: i64,
    pub d: i64,
    pub tx: Unit,
    pub ty: Unit,
}

Fixed-point affine transform using millionth scale coefficients.

Fields

a: i64

Horizontal scale/rotation coefficient.

b: i64

Vertical shear/rotation coefficient.

c: i64

Horizontal shear/rotation coefficient.

d: i64

Vertical scale/rotation coefficient.

tx: Unit

Horizontal translation.

ty: Unit

Vertical translation.

Implementations

impl Transform

pub const IDENTITY: Self

Identity transform.

pub const fn translation(tx: Unit, ty: Unit) -> Self

Creates a checked page-space translation.

pub fn scale(x: i64, y: i64) -> Result<Self>

Creates a fixed-point scale. Negative coefficients mirror an axis.

pub fn rotation_degrees(degrees: i32) -> Result<Self>

Creates an integer-degree rotation quantized to millionth coefficients.

pub fn then(self, next: Self) -> Result<Self>

Applies self, then next, using checked fixed-point matrix composition.

pub fn around(self, origin: Point) -> Result<Self>

Applies this linear transform around an explicit page-space origin.

pub const fn is_identity(self) -> bool

Whether the transform leaves page coordinates unchanged.

pub fn inverse_vector(self, vector: Point) -> Result<Point>

Maps a page-space displacement back through the linear matrix.

pub fn apply(self, point: Point) -> Result<Point>

Transforms a point with checked fixed-point arithmetic.

pub fn bounds(self, rect: Rect) -> Result<Rect>

Returns the axis-aligned bounds of a transformed rectangle.

Trait Implementations

impl Clone for Transform

fn clone(&self) -> Transform

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for Transform

impl Debug for Transform

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

Formats the value using the given formatter.

impl Default for Transform

fn default() -> Self

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for Transform

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Eq for Transform

impl PartialEq for Transform

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

Equality operator ==.

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

Inequality operator !=.

impl Serialize for Transform

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for Transform