ersa::Rect Struct Reference

#include <types.h>

Public Member Functions
constexpr	Rect ()=default
constexpr	Rect (int16_t rx, int16_t ry, int16_t rw, int16_t rh)
constexpr bool	isEmpty () const
constexpr bool	contains (int16_t px, int16_t py) const

Public Attributes
int16_t	x {0}
int16_t	y {0}
int16_t	w {0}
int16_t	h {0}

Detailed Description

Half-open axis-aligned rectangle used for layout and partial refresh regions. Left/top are included and right/bottom are excluded; this convention matches framebuffer indexing and allows adjacent regions to share an edge safely.

Constructor & Destructor Documentation

Rect() [1/2]

constexpr ersa::Rect::Rect ( )

constexprdefault

Construct an empty rectangle at the origin.

Rect() [2/2]

constexpr ersa::Rect::Rect ( int16_t  rx, int16_t  ry, int16_t  rw, int16_t  rh  )

inlineconstexpr

Construct a rectangle with origin and width/height extents.

Member Function Documentation

contains()

constexpr bool ersa::Rect::contains ( int16_t  px, int16_t  py  ) const

inlineconstexpr

Test point containment using the half-open edge convention.

isEmpty()

constexpr bool ersa::Rect::isEmpty ( ) const

inlineconstexpr

Return true if either extent is zero or negative.

Member Data Documentation

h

int16_t ersa::Rect::h {0}

Vertical extent; non-positive values make the rectangle empty.

w

int16_t ersa::Rect::w {0}

Horizontal extent; non-positive values make the rectangle empty.

x

int16_t ersa::Rect::x {0}

Inclusive left edge in logical pixels.

y

int16_t ersa::Rect::y {0}

Inclusive top edge in logical pixels.

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The documentation for this struct was generated from the following file:

• include/ersa/common/types.h