-- Hoogle documentation, generated by Haddock
-- See Hoogle, http://www.haskell.org/hoogle/


-- | Parsing the path command of SVG
--   
--   Parsing the path command of SVG
@package SVGPath
@version 1.1


-- | parsing the SVG path command, see
--   <a>http://www.w3.org/TR/SVG/paths.html#PathData</a> :
module Graphics.SVG.ReadPath

-- | convert a SVG path string into a list of commands
pathFromString :: String -> IO [PathCommand]
data PathCommand

-- | Establish a new current point (with absolute coords)
M_abs :: Tup -> PathCommand

-- | Establish a new current point (with coords relative to the current
--   point)
M_rel :: Tup -> PathCommand

-- | Close current subpath by drawing a straight line from current point to
--   current subpath's initial point
Z :: PathCommand

-- | A line from the current point to Tup which becomes the new current
--   point
L_abs :: Tup -> PathCommand
L_rel :: Tup -> PathCommand

-- | A horizontal line from the current point (cpx, cpy) to (x, cpy)
H_abs :: X -> PathCommand
H_rel :: X -> PathCommand

-- | A vertical line from the current point (cpx, cpy) to (cpx, y)
V_abs :: Y -> PathCommand
V_rel :: Y -> PathCommand

-- | Draws a cubic Bzier curve from the current point to (x,y) using
--   (x1,y1) as the ^control point at the beginning of the curve and
--   (x2,y2) as the control point at the end of the curve.
C_abs :: (X1, Y1, X2, Y2, X, Y) -> PathCommand
C_rel :: (X1, Y1, X2, Y2, X, Y) -> PathCommand

-- | Draws a cubic Bzier curve from the current point to (x,y). The first
--   control point is assumed to be the reflection of the second control
--   point on the previous command relative to the current point. (If there
--   is no previous command or if the previous command was not an C, c, S
--   or s, assume the first control point is coincident with the current
--   point.) (x2,y2) is the second control point (i.e., the control point
--   at the end of the curve).
S_abs :: (X2, Y2, X, Y) -> PathCommand
S_rel :: (X2, Y2, X, Y) -> PathCommand

-- | A quadr. Bzier curve from the curr. point to (x,y) using (x1,y1) as
--   the control point
Q_abs :: (X1, Y1, X, Y) -> PathCommand

-- | Nearly the same as cubic, but with one point less
Q_rel :: (X1, Y1, X, Y) -> PathCommand

-- | T_Abs = Shorthand/smooth quadratic Bezier curveto
T_abs :: Tup -> PathCommand
T_rel :: Tup -> PathCommand

-- | A = Elliptic arc (not used)
A_abs :: PathCommand
A_rel :: PathCommand

-- | convert path-commands to outline points
commandsToPoints :: [PathCommand] -> F2 -> F2 -> [[F2]]
ctp :: [PathCommand] -> [F2] -> F2 -> Bool -> F2 -> F2 -> [[F2]]

-- | bSubcurve uses bezier subdivision. (inspired by Hersch, Font
--   Rasterization: the State of the Art (freely available)) It divides an
--   arc into two arcs recursively until the arc is either completely
--   between two vertical raster lines or completely between two horizontal
--   raster lines or the line is at most 1 pixel long. This function
--   computes outline points (tex==False) as well as border points for
--   rasterisation (tex==True) by using an x-, y-resoultion raster. dx, dy
--   is the width and height of a pixel of this raster.
bSubCurve :: Bool -> (X, Y) -> [F2] -> [F2]
instance Show PathCommand