This module provides efficient functions for rendering vector
graphics to a number of formats, including EPS, PostScript, and
PDF. It provides an abstraction for multi-page documents, as well
as a set of graphics primitives for page descriptions.
The graphics model is similar to that of the PostScript and PDF
languages, but we only implement a subset of their functionality.
Care has been taken that graphics rendering is done efficiently and
as lazily as possible; documents are rendered "on the fly",
without the need to store the whole document in memory.
The provided document description model consists of two separate
layers of abstraction:
drawing is concerned with placing marks on a fixed surface, and
takes place in the Draw monad;
document structure is concerned with a sequence of pages, their
bounding boxes, and other meta-data. It takes place in the
Document monad.
In principle, the functionality provided by EasyRender is similar to
a subset of Cairo; however, EasyRender is lightweight and at least
an order of magnitude faster.
