D2D1POINT2F

D2D1_POINT_2F is a data structure used in the Direct2D API to represent a two-dimensional point with floating-point coordinates. It is commonly written as D2D1_POINT_2F and is defined as a simple structure containing two members: x and y, both of type FLOAT. The coordinates describe a location in a 2D coordinate space, typically in device-independent pixels (DIPs) or in the local space used by Direct2D drawing operations.

Usage and purpose: D2D1_POINT_2F is used wherever a point needs to be passed to drawing or geometry functions, such as defining endpoints, anchor points, or control points for rendering operations. Developers often construct points with helper functions like D2D1::Point2F, for example to create a point with coordinates (100.0f, 50.0f). The type is a lightweight value type optimized for performance in rendering code.

Relation to other types: D2D1_POINT_2F is part of a family of simple geometric types in Direct2D. Related types include D2D1_POINT_2U (a point with unsigned integer coordinates), D2D1_SIZE_F (width and height as floats), and D2D1_RECT_F (a rectangle defined by left, top, right, and bottom as floats). These types share a consistent layout and are used across the API to represent geometric data.

Implementation notes: The type is defined in the Direct2D header (d2d1.h) and is used across the API to pass coordinates to drawing and geometry routines. It is a plain data container with no behavior beyond storing x and y values, suited for efficient interoperability with rendering functions.

See also: D2D1_SIZE_F, D2D1_RECT_F, D2D1_POINT_2U, D2D1::Point2F.