osmscout::ScreenRectMask Class Reference

Holds a rectangular bit mask. More...

#include <LabelLayouterHelper.h>

Public Member Functions
uint64_t	GetCell (size_t idx) const
	Return the cells in the interval [GetFirstCell(),GetLastCell()]. More...
int	GetFirstCell () const
	Return the index of the initial, left-sided bit mask cell (containing x coordinate of rectangle) More...
int	GetFirstRow () const
	Return starting index of row (y-coordinate of rectangle) More...
int	GetLastCell () const
	Return the index of the final, right-sided bit mask cell (containing x+width-1 coordinate of rectangle) More...
int	GetLastRow () const
	Return final index of row (y+height-1 of rectangle) More...
bool	Intersects (const ScreenRectMask &other) const
	ScreenRectMask ()=default
	ScreenRectMask (size_t screenWidth, const ScreenPixelRectangle &rect)

Detailed Description

Holds a rectangular bit mask.

Implementation: Only one row of the mask is stored together with the indexes of the starting and final row

Constructor & Destructor Documentation

ScreenRectMask() [1/2]

osmscout::ScreenRectMask::ScreenRectMask ( )

default

ScreenRectMask() [2/2]

osmscout::ScreenRectMask::ScreenRectMask	(	size_t	screenWidth,
		const ScreenPixelRectangle &	rect
	)

References osmscout::ScreenPixelRectangle::height, osmscout::ScreenPixelRectangle::width, osmscout::ScreenPixelRectangle::x, and osmscout::ScreenPixelRectangle::y.

Member Function Documentation

GetCell()

uint64_t osmscout::ScreenRectMask::GetCell

(

size_t

idx

)

const

Return the cells in the interval [GetFirstCell(),GetLastCell()].

A cell contains a part of the bitmask of a row of the rectangle.

The lowest bit 0x1 is the first bit in the mask, higher bits represent further bits to the "right" in the mask

Parameters

idx

the index

Returns

te bit mask

Referenced by osmscout::ScreenMask::AddMask(), and osmscout::ScreenMask::HasCollision().

GetFirstCell()

int osmscout::ScreenRectMask::GetFirstCell ( ) const

inline

Return the index of the initial, left-sided bit mask cell (containing x coordinate of rectangle)

Returns

index

Referenced by osmscout::ScreenMask::AddMask(), and osmscout::ScreenMask::HasCollision().

GetFirstRow()

int osmscout::ScreenRectMask::GetFirstRow ( ) const

inline

Return starting index of row (y-coordinate of rectangle)

Returns

index

Referenced by osmscout::ScreenMask::AddMask(), and osmscout::ScreenMask::HasCollision().

GetLastCell()

int osmscout::ScreenRectMask::GetLastCell ( ) const

inline

Return the index of the final, right-sided bit mask cell (containing x+width-1 coordinate of rectangle)

Returns

index

Referenced by osmscout::ScreenMask::AddMask(), and osmscout::ScreenMask::HasCollision().

GetLastRow()

int osmscout::ScreenRectMask::GetLastRow ( ) const

inline

Return final index of row (y+height-1 of rectangle)

Returns

index

Referenced by osmscout::ScreenMask::AddMask(), and osmscout::ScreenMask::HasCollision().

Intersects()

bool osmscout::ScreenRectMask::Intersects

(

const ScreenRectMask &

other

)

const

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The documentation for this class was generated from the following files:

• LabelLayouterHelper.h
• LabelLayouterHelper.cpp