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Module Pdffun

module Pdffun: sig .. end

Parsing and Evaluating PDF Functions.

type calculator =
| If of calculator list
| IfElse of calculator list * calculator list
| Bool of bool
| Float of float
| Int of int32
| Abs
| Add
| Atan
| Ceiling
| Cos
| Cvi
| Cvr
| Div
| Exp
| Floor
| Idiv
| Ln
| Log
| Mod
| Mul
| Neg
| Round
| Sin
| Sqrt
| Sub
| Truncate
| And
| Bitshift
| Eq
| Ge
| Gt
| Le
| Lt
| Ne
| Not
| Or
| Xor
| Copy
| Exch
| Pop
| Dup
| Index
| Roll 
type sampled = {
   size : int list;
   order : int;
   encode : float list;
   decode : float list;
   bps : int;
   samples : int32 array;
} 
type interpolation = {
   c0 : float list;
   c1 : float list;
   n : float;
} 
type stitching = {
   functions : t list;
   bounds : float list;
   stitch_encode : float list;
} 
type pdf_fun_kind =
| Interpolation of interpolation
| Stitching of stitching
| Sampled of sampled
| Calculator of calculator list 
type t = {
   func : pdf_fun_kind;
   domain : float list;
   range : float list option;
}

The type of functions.

val parse_function : Pdf.t -> Pdf.pdfobject -> t

Parse a function given a document and function object.

exception BadFunctionEvaluation of string

Raised from eval_function (see below) in the case of inputs which don't match the evaluation

val eval_function : t -> float list -> float list

Evaluate a function given a list of inputs.

val pdfobject_of_function : Pdf.t -> t -> Pdf.pdfobject

Flatten a function to its PDF representation

val print_function : t -> unit

Print a function to Standard Output. For debug only.