\chapter{Introduction}\label{Introduction}
-The introduction will be witty and engaging and a joy to read.
+Early electronic document formats such as PostScript were motivated by a need to print documents onto a paper medium. In the PostScript standard, this lead to a model of the document as a program; a series of instructions to be executed by an interpreter which would result in ``ink'' being placed on ``pages'' of a fixed size\cite{plrm}. The ubiquitous Portable Document Format (PDF) standard provides many enhancements to PostScript taking into account desktop publishing requirements\cite{cheng2002portable}, but it is still fundamentally based on the same imaging model\cite{pdfref17}. This idea of a document as a static ``page'' has lead to limitations on what could be achieved with a digital document viewers \cite{hayes2012pixels}.
-I hope.
+The emergence of the internet, web browsers, XML/HTML, JavaScript and related technologies has seen a revolution in the ways in which information can be presented digitally, and the PDF standard itself has begun to move beyond static text and figures\cite{hayes2012pixels, barnes2013embedding}. However, the popular document formats are still designed with the intention of showing information at either a single, fixed level of detail, or a small range of levels.
-Points to address:
-\begin{enumerate}
- \item What this is.
- \item Why we should care
- \item Most recent development
- \item Do we really mean ``infinite''? (No. Sorry. We lied)
- \item Foundational papers. Historical notes.
-\end{enumerate}
+As most digital display devices are smaller than physical paper medium, all useful viewers are able to ``zoom'' to a subset of the document. Vector graphics formats including PostScript, PDF and SVG support rasterisation at different zoom levels\cite{plrm, pdfref17, svg2011-1.1}, but the use of fixed precision floating point numbers causes problems due to imprecision either far from the origin, or at a high level of detail\cite{goldberg1991whatevery, goldberg1992thedesign}.
-See also: The Abstract.
-See also: The Conclusion.
+There are many possible applications for documents in which precision is unlimited. Several areas of use include: visualisation of extremely large or infinite data sets; visualisation of high precision numerical computations; digital artwork; computer aided design; and maps.
-The remainder of this report will be organised as follows: Chapters \ref{BackgroundHardware} and \ref{BackgroundSoftware} will discuss approaches to representation of numbers in both Hardware and Software respectively; Chapter \ref{Approach} will outline the approach [reword] considering <insert fuzzy list of faculty dependent requirements here (Safety, Ethics, Group Work Process, etc)>. Chapter/Appendices \ref{Implementation} will provide implementation notes. Chapter \ref{Results} will describe our results. Chapter \ref{Conclusion} will be the conclusion.
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-
-
-NOTE: Given that I don't actually need a full thesis, change from Chapters to Sections?
-NOTE2: Will treat as a full thesis but if it gets too big, submit a condensed version as the MCTX "report".
-
-NOTE3: In final version, put the Approach at the end and/or in appendices before the Implementation notes rather than the start (?)
+In collaboration with Gow\cite{} we have implemented a proof of concept document viewer compatable with a subset of the SVG standard, which has allowed us to explore the limitations of floating point arithmetic and possible approaches to achieving arbitrary precision document formats. Using the Rational representation of the GNU Multiple Precision (GMP) library\cite{granlund2004GMP} we are able to implement correct rendering of SVG test images seperated by arbitrary distances. We present measurements of rendering accuracy and performance for our implementation. An alternative implementation based on a spatial approach to constructing the document is discussed by Gow\cite{}.
git.ucc.asn.au / ipdf / sam.git / blobdiff
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