HGL-3.2.0.2: A simple graphics library based on X11 or Win32 Source code Contents Index

Graphics.HGL.Draw.Region Portability non-portable (requires concurrency) Stability provisional Maintainer libraries@haskell.org

Description

An efficient representation of sets of pixels.

Synopsis

data Region emptyRegion :: Region rectangleRegion :: Point -> Point -> Region ellipseRegion :: Point -> Point -> Region polygonRegion :: [Point] -> Region intersectRegion :: Region -> Region -> Region unionRegion :: Region -> Region -> Region subtractRegion :: Region -> Region -> Region xorRegion :: Region -> Region -> Region regionToGraphic :: Region -> Graphic

Documentation

data Region Source

emptyRegion :: Region Source

An empty region. This is not supported on Win32. It is possible to use an empty rectangle region instead.

rectangleRegion :: Point -> Point -> Region Source

A rectangular region, with the given points as opposite corners.

ellipseRegion :: Point -> Point -> Region Source

An elliptical region that fits in the rectangle with the given points as opposite corners.

polygonRegion :: [Point] -> Region Source

A polygonal region defined by a list of Points.

intersectRegion :: Region -> Region -> Region Source

The intersection of two regions.

unionRegion :: Region -> Region -> Region Source

The union of two regions.

subtractRegion :: Region -> Region -> Region Source

The part of the first region that is not also in the second.

xorRegion :: Region -> Region -> Region Source

The symmetric difference of two regions.

regionToGraphic :: Region -> Graphic Source

Fill a Region using the current Graphics.HGL.Draw.Brush.

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