rose::AntiAliasedDrawing Class Reference

Collaboration diagram for rose::AntiAliasedDrawing:

Public Types
enum	DrawingType { SimpleLine, AntiAliased }
	The drawing style used by the drawing engine. More...

Public Member Functions
	AntiAliasedDrawing (gm::Context &context, DrawingType drawingType)
	Create an anti-aliased drawing context with a given width and colour. More...
void	setWidthColor (gm::Context &context, int width, color::RGBA rgba, Size &widgetSize)
	Set the width and colour of a line to be drawn. More...
void	setColor (gm::Context &context, color::RGBA rgba, Size &widgetSize)
	Set the colour of the line to be drawn. More...
void	drawLine (gm::Context &context, Position< float > p0, Position< float > p1, int interiorWidth=0)
	Implement a modified Xiaolin Wu anti aliasing algorithm. More...
template<typename T >
bool	renderLine (gm::Context &context, Position< T > p0, Position< T > p1)
	Draw an anti-aliased line. More...

Protected Attributes
DrawingType	mDrawingType {SimpleLine}
color::RGBA	mColor {color::RGBA::OpaqueBlack}
int	mWidth {1}
gm::Texture	mTexture {}
Size	mWidgetSize {}

Member Enumeration Documentation

DrawingType

enum rose::AntiAliasedDrawing::DrawingType

The drawing style used by the drawing engine.

Enumerator
SimpleLine	Simple lines, no anti-aliasing.
AntiAliased	Modified Wu's algorithm anti-aliaseing.

Constructor & Destructor Documentation

AntiAliasedDrawing()

rose::AntiAliasedDrawing::AntiAliasedDrawing	(	gm::Context &	context,
		DrawingType	drawingType
	)

Create an anti-aliased drawing context with a given width and colour.

Parameters

context	The graphics context to use.
width	The width of the line in pixels.
rgba	The line colour RGBA.

Member Function Documentation

drawLine()

void rose::AntiAliasedDrawing::drawLine	(	gm::Context &	context,
		Position< float >	p0,
		Position< float >	p1,
		int	interiorWidth = 0
	)

Implement a modified Xiaolin Wu anti aliasing algorithm.

Implements the Xiaolin Wu anti aliased line algorithm but inserts interiorWidth stuffing pixels between the two controlled brightness pixes. When interiorWidth is 0 the normal Wu algorithm is used.

Parameters

context	The Graphics Context used to draw.
p0	The starting point for the line.
p1	The ending point for the line.
interiorWidth	Stuffing width of the line.

renderLine()

template<typename T >

bool rose::AntiAliasedDrawing::renderLine ( gm::Context &  context, Position< T >  p0, Position< T >  p1  )

inline

Draw an anti-aliased line.

Parameters

context	The graphics context to use.
p0	The start point.
p1	The end point.

Returns

True if the rendering operation returned success.

setColor()

void rose::AntiAliasedDrawing::setColor ( gm::Context &  context, color::RGBA  rgba, Size &  widgetSize  )

inline

Set the colour of the line to be drawn.

Parameters

context	The graphics context to use.
rgba	The line colour RGBA.

setWidthColor()

void rose::AntiAliasedDrawing::setWidthColor	(	gm::Context &	context,
		int	width,
		color::RGBA	rgba,
		Size &	widgetSize
	)

Set the width and colour of a line to be drawn.

Parameters

context	The graphics context to use.
width	The width of the line in pixels.
rgba	The line colour RGBA.

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

• src/AntiAliasedDrawing.h
• src/AntiAliasedDrawing.cpp