public struct TransformOrigin : IEquatable<TransformOrigin>

By default, transform-origin is set in percentages relative to the element's size. For example, 50% 50% sets the origin to the center of the element. These percentages are calculated based on the element’s resulting layout size (resolvedStyle.height and resolvedStyle.width). You can also specify transform-origin in pixels. The origin is determined based on the local coordinate system of the element, where the top-left corner is considered the origin point (0,0) regardless of whether you use percentages or pixels. Negative values and values larger than 100% are valid and move the transform-origin outside the element.