Render.CG.Minus

CG (minus) rendering in terms of Render.

Paths

nil :: Render ()

Render nothing.

line2 :: Pt R -> Pt R -> Render ()

line :: Ls R -> Render ()

Render Ls as moveTo then sequence of lineTo.

polygon :: Ls R -> Render ()

Variant of line that runs closePath.

points :: R -> Ls R -> Render ()

Render Ls as set of square points with R dimension. Runs fill on each square.

circle :: Pt R -> R -> Render ()

Circle centred at Pt with radius R.

Context & drawing

grey :: R -> Render ()

Greyscale call to setSourceRGBA.

colour :: Ca -> Render ()

Ca call to setSourceRGBA.

pen :: R -> Ca -> ([R], R) -> Render ()

Set line width R and Ca.

Composite

area :: R -> Ca -> Ca -> Ls R -> Render ()

Run polygon on Ls then fill and stroke.

area_def :: Ca -> Ls R -> Render ()

Variant of area with default border of width 0.005 and grey 0.15.

outline :: R -> Ca -> Ls R -> Render ()

Run polygon on Ls then pen and stroke.

rect :: R -> Ca -> Pt R -> (R, R) -> Render ()

Outline rectangle given colour line width R, Ca, upper-left Pt and (width,height).

rect_fill :: Ca -> Pt R -> (R, R) -> Render ()

Solid variant of rect.

Text

text :: Ca -> Pt R -> R -> String -> Render ()

Render text String in colour Ca at Pt in font size sz.

Rendering

data File_Type

Enumeration of file types.

Constructors

F_PDF

F_SVG

maybe_add_extension :: String -> FilePath -> FilePath

If nm does not have ext append it.

map (maybe_add_extension ".pdf") ["x.pdf","x.y"] == ["x.pdf","x.y.pdf"]

render_to_file :: File_Type -> (R, R) -> FilePath -> Render () -> IO ()

Render to File_Type. (w,h) gives the page size. The appropriate extension is appended to FilePath if required.

render_to_pdf :: (R, R) -> FilePath -> Render () -> IO ()

Render to PDF file.

render_to_svg :: (R, R) -> FilePath -> Render () -> IO ()

Render to SVG file.