Copyright	(c) 2023 haskell@henning-thielemann.de
License	BSD-style
Maintainer	haskell@henning-thielemann.de
Stability	experimental
Portability	portable
Safe Haskell	Safe-Inferred
Language	Haskell2010

Graphics.PDF.Transparency

Contents

Transparency

Description

PDF transparency

Synopsis

data SoftMask
createSoftMask :: Rectangle -> Draw a -> PDF SoftMask
createTransparencyGroup :: ColorSpace a e -> Rectangle -> Draw b -> PDF (PDFReference PDFXForm)
paintWithTransparency :: SoftMask -> Draw a -> Draw ()

Transparency

data SoftMask Source #

Instances

Instances details

Eq SoftMask Source #
Instance details Defined in Graphics.PDF.Draw Methods (==) :: SoftMask -> SoftMask -> Bool # (/=) :: SoftMask -> SoftMask -> Bool #
Ord SoftMask Source #
Instance details Defined in Graphics.PDF.Draw Methods compare :: SoftMask -> SoftMask -> Ordering # (<) :: SoftMask -> SoftMask -> Bool # (<=) :: SoftMask -> SoftMask -> Bool # (>) :: SoftMask -> SoftMask -> Bool # (>=) :: SoftMask -> SoftMask -> Bool # max :: SoftMask -> SoftMask -> SoftMask # min :: SoftMask -> SoftMask -> SoftMask #

createSoftMask Source #

Arguments

:: Rectangle	Bounding box
-> Draw a	Content of the soft mask
-> PDF SoftMask

createTransparencyGroup Source #

Arguments

:: ColorSpace a e
-> Rectangle	Bounding box
-> Draw b	Painting
-> PDF (PDFReference PDFXForm)

paintWithTransparency Source #

Arguments

:: SoftMask	Soft mask
-> Draw a	Shape to paint
-> Draw ()

If the Draw Monad paints overlapping geometric primitives or text, the result will certainly not be what you want. Text ignores soft masks. Each primitive other than text is painted with the soft mask over the previous geometric objects. It is very likely, that in this case you want to generate a transparency group for your drawing.