Where does SizeF live in the IronDrawing API?

SizeF is a class in the IronSoftware.Drawing namespace, shipped in IronSoftware.Drawing.dll. It derives from ValueType and is constructed directly with new SizeF(float width, float height), new SizeF(PointF), or new SizeF(SizeF).

How do you scale or transform a SizeF in C#?

Multiply by a scalar using the * operator (SizeF * float or float * SizeF) to scale uniformly, divide with the / operator, or call SizeF.Transform(size, matrix) to apply a full Matrix3x2 affine transformation.

How do you convert SizeF to SKSize or Vector2?

IronSoftware.Drawing.SizeF provides implicit conversion operators to both SKSize and Vector2, so you can assign a SizeF directly to a variable of either type without an explicit cast.

What is SizeF.Empty used for?

SizeF.Empty is a static readonly field that holds a SizeF with Width and Height both set to zero. It serves as a safe default or sentinel value when no meaningful size has been assigned yet.

Class SizeF

Stores an ordered pair of single precision floating points, which specify a height and width.

Inheritance

System.Object

SizeF

Implements

System.IEquatable<SizeF>

Namespace: IronSoftware.Drawing

Assembly: IronSoftware.Drawing.Common.dll

Syntax

public sealed class SizeF : ValueType

A precise, cross-library size record for floating-point dimensions, SizeF stores an ordered pair of float values representing Width and Height. It bridges IronDrawing with SkiaSharp (SKSize), System.Numerics (Vector2), and the rest of the .NET drawing ecosystem through a rich set of implicit and explicit conversions, so a size measured in one library passes cleanly into another without manual unpacking.

Construct a SizeF from two floats, from a PointF, or by copying an existing SizeF. The static SizeF.Empty field provides a zero-initialized sentinel. Once created, Width and Height are mutable properties, and Deconstruct lets you unpack both values in a single tuple assignment. Equality is covered by both Equals(SizeF) and the == / != operators, making the struct safe to compare in conditional logic.

**Arithmetic and geometry** are handled through named static methods and operator overloads:

- Building and modifying: Add and the + operator combine two sizes; Subtract and the - operator reduce one. - Scaling: * scales a size by a scalar (both SizeF * float and float * SizeF); / divides by a scalar. - Transformation: Transform(SizeF, Matrix3x2) applies a 2-D affine matrix, useful for rotating or skewing a bounding box before passing it to a renderer.

**Conversions** cover the most common cross-library handoffs. Implicit casts move a SizeF to SKSize and Vector2 without any explicit cast syntax. Explicit casts to PointF and Size are intentionally narrowing: PointF reinterprets the width and height as X and Y coordinates, while Size truncates the floats to integers.

Because SizeF is a value type derived from ValueType, it allocates on the stack, copies by value, and carries no hidden heap cost. This makes it practical in tight loops that compute image tile dimensions, layout bounds, or canvas regions at high frequency.

using IronSoftware.Drawing;
using System.Numerics;

SizeF original = new SizeF(120.5f, 80.25f);
SizeF padding  = new SizeF(10f, 10f);
SizeF padded   = SizeF.Add(original, padding);

var (w, h) = padded;                      // Deconstruct
SizeF scaled  = padded * 1.5f;
Vector2 vec   = scaled;                   // implicit to Vector2
Console.WriteLine(scaled.ToString());

Explore more in the IronDrawing get-started guide, the color and geometry examples, the cross-library conversion how-to, and the IronDrawing docs hub.

Constructors

SizeF(PointF)

Initializes a new instance of the SizeF struct from the given PointF.

Declaration

public SizeF(PointF point)

Parameters

Type	Name	Description
PointF	point	The point.

SizeF(SizeF)

Initializes a new instance of the SizeF struct.

Declaration

public SizeF(SizeF size)

Parameters

Type	Name	Description
SizeF	size	The size.

SizeF(Single, Single)

Initializes a new instance of the SizeF struct.

Declaration

public SizeF(float width, float height)

Parameters

Type	Name	Description
System.Single	width	The width of the size.
System.Single	height	The height of the size.

Fields

Empty

Represents a SizeF that has Width and Height values set to zero.

Declaration

public static readonly SizeF Empty

Field Value

Type	Description
SizeF

Properties

Height

Gets or sets the height of this SizeF.

Declaration

public float Height { get; set; }

Property Value

Type	Description
System.Single

Width

Gets or sets the width of this SizeF.

Declaration

public float Width { get; set; }

Property Value

Type	Description
System.Single

Methods

Add(SizeF, SizeF)

Performs vector addition of two SizeF objects.

Declaration

public static SizeF Add(SizeF left, SizeF right)

Parameters

Type	Name	Description
SizeF	left	The size on the left hand of the operand.
SizeF	right	The size on the right hand of the operand.

Returns

Type	Description
SizeF	The SizeF.

Deconstruct(out Single, out Single)

Deconstructs this size into two floats.

Declaration

public void Deconstruct(out float width, out float height)

Parameters

Type	Name	Description
System.Single	width	The out value for the width.
System.Single	height	The out value for the height.

Equals(SizeF)

Declaration

public bool Equals(SizeF other)

Parameters

Type	Name	Description
SizeF	other

Returns

Type	Description
System.Boolean

Equals(Object)

Declaration

public override bool Equals(object obj)

Parameters

Type	Name	Description
System.Object	obj

Returns

Type	Description
System.Boolean

GetHashCode()

Calculate a hash code.

Declaration

public override int GetHashCode()

Returns

Type	Description
System.Int32

Subtract(SizeF, SizeF)

Contracts a SizeF by another SizeF.

Declaration

public static SizeF Subtract(SizeF left, SizeF right)

Parameters

Type	Name	Description
SizeF	left	The size on the left hand of the operand.
SizeF	right	The size on the right hand of the operand.

Returns

Type	Description
SizeF	The SizeF.

ToString()

Declaration

public override string ToString()

Returns

Type	Description
System.String

Transform(SizeF, Matrix3x2)

Transforms a size by the given matrix.

Declaration

public static SizeF Transform(SizeF size, Matrix3x2 matrix)

Parameters

Type	Name	Description
SizeF	size	The source size.
System.Numerics.Matrix3x2	matrix	The transformation matrix.

Returns

Type	Description
SizeF	A transformed size.

Operators

Addition(SizeF, SizeF)

Computes the sum of adding two sizes.

Declaration

public static SizeF operator +(SizeF left, SizeF right)

Parameters

Type	Name	Description
SizeF	left	The size on the left hand of the operand.
SizeF	right	The size on the right hand of the operand.

Returns

Type	Description
SizeF	The SizeF.

Division(SizeF, Single)

Divides SizeF by a System.Single producing SizeF.

Declaration

public static SizeF operator /(SizeF left, float right)

Parameters

Type	Name	Description
SizeF	left	Dividend of type SizeF.
System.Single	right	Divisor of type System.Int32.

Returns

Type	Description
SizeF	Result of type SizeF.

Equality(SizeF, SizeF)

Compares two SizeF objects for equality.

Declaration

public static bool operator ==(SizeF left, SizeF right)

Parameters

Type	Name	Description
SizeF	left	The size on the left hand of the operand.
SizeF	right	The size on the right hand of the operand.

Returns

Type	Description
System.Boolean	True if the current left is equal to the `right` parameter; otherwise, false.

Explicit(SizeF to PointF)

Converts the given SizeF into a PointF.

Declaration

public static explicit operator PointF(SizeF size)

Parameters

Type	Name	Description
SizeF	size	The size.

Returns

Type	Description
PointF

Explicit(SizeF to Size)

Creates a Size with the dimensions of the specified SizeF by truncating each of the dimensions.

Declaration

public static explicit operator Size(SizeF size)

Parameters

Type	Name	Description
SizeF	size	The size.

Returns

Type	Description
Size	The Size.

Implicit(SizeF to SizeF)

Convert to a Microsoft.Maui.Graphics.SizeF type.

Declaration

public static implicit operator SizeF(SizeF v)

Parameters

Type	Name	Description
SizeF	v

Returns

Type	Description
Microsoft.Maui.Graphics.SizeF

Implicit(SizeF to SizeF)

Convert to a SixLabors.ImageSharp.SizeF type.

Declaration

public static implicit operator SizeF(SizeF v)

Parameters

Type	Name	Description
SizeF	v

Returns

Type	Description
SixLabors.ImageSharp.SizeF

Implicit(SizeF to SKSize)

Convert to a SkiaSharp.SKSize type.

Declaration

public static implicit operator SKSize(SizeF v)

Parameters

Type	Name	Description
SizeF	v

Returns

Type	Description
SkiaSharp.SKSize

Implicit(SizeF to SizeF)

Convert to a System.Drawing.Size type.

Declaration

public static implicit operator SizeF(SizeF v)

Parameters

Type	Name	Description
SizeF	v

Returns

Type	Description
System.Drawing.SizeF

Implicit(SizeF to Vector2)

Creates a System.Numerics.Vector2 with the coordinates of the specified PointF.

Declaration

public static implicit operator Vector2(SizeF point)

Parameters

Type	Name	Description
SizeF	point	The point.

Returns

Type	Description
System.Numerics.Vector2	The System.Numerics.Vector2.

Implicit(SizeF to SizeF)

Convert a Microsoft.Maui.Graphics.SizeF type to a SizeF type.

Declaration

public static implicit operator SizeF(SizeF v)

Parameters

Type	Name	Description
Microsoft.Maui.Graphics.SizeF	v

Returns

Type	Description
SizeF

Implicit(SizeF to SizeF)

Convert a System.Drawing.SizeF type to a SizeF type.

Declaration

public static implicit operator SizeF(SizeF v)

Parameters

Type	Name	Description
SixLabors.ImageSharp.SizeF	v

Returns

Type	Description
SizeF

Implicit(SKSize to SizeF)

Convert a SkiaSharp.SKSize type to a SizeF type.

Declaration

public static implicit operator SizeF(SKSize v)

Parameters

Type	Name	Description
SkiaSharp.SKSize	v

Returns

Type	Description
SizeF

Implicit(SizeF to SizeF)

Convert a System.Drawing.SizeF type to a SizeF type.

Declaration

public static implicit operator SizeF(SizeF v)

Parameters

Type	Name	Description
System.Drawing.SizeF	v

Returns

Type	Description
SizeF

Inequality(SizeF, SizeF)

Compares two SizeF objects for inequality.

Declaration

public static bool operator !=(SizeF left, SizeF right)

Parameters

Type	Name	Description
SizeF	left	The size on the left hand of the operand.
SizeF	right	The size on the right hand of the operand.

Returns

Type	Description
System.Boolean	True if the current left is unequal to the `right` parameter; otherwise, false.

Multiply(SizeF, Single)

Multiplies SizeF by a System.Single producing SizeF.

Declaration

public static SizeF operator *(SizeF left, float right)

Parameters

Type	Name	Description
SizeF	left	Multiplicand of type SizeF.
System.Single	right	Multiplier of type System.Single.

Returns

Type	Description
SizeF	Product of type SizeF.

Multiply(Single, SizeF)

Multiplies SizeF by a System.Single producing SizeF.

Declaration

public static SizeF operator *(float left, SizeF right)

Parameters

Type	Name	Description
System.Single	left	Multiplier of type System.Single.
SizeF	right	Multiplicand of type SizeF.

Returns

Type	Description
SizeF	Product of type SizeF.

Subtraction(SizeF, SizeF)

Computes the difference left by subtracting one size from another.

Declaration

public static SizeF operator -(SizeF left, SizeF right)

Parameters

Type	Name	Description
SizeF	left	The size on the left hand of the operand.
SizeF	right	The size on the right hand of the operand.

Returns

Type	Description
SizeF	The SizeF.

Implements

System.IEquatable<>