Google Docs' PDF viewer

Question

I downloaded the cm-super package and for comparison, created 5 versions of my document with different fonts:

• Computer Modern
• CM-Super
• CM-Super with microtype
• Latin Modern
• Latin Modern with microtype

All 5 versions were then uploaded to Google Docs and viewed with their PDF viewer which AFAIK generates PNG images for the browser to display.

Here is an image showing a portion with Computer Modern:

This is Latin Modern with microtype:

As you can see Latin Modern was rendered into an ugly duckling. The same happened to CM-Super too. Disturbing about this is that CM-Super and Latin Modern look much better in Adobe Reader than CM, so it seems I have to decide between online and offline viewing.

My question is:

1. Why does this happen?
2. How can I disable cm-super in MiKTeX if I decide upon using the original CM font? Is uninstalling in Package Manager the only way (and does it work)? (Sorry for so distant questions.)

EDIT: MWE
Unfortunately you can't switch cm-super on and off so simply.

\documentclass{minimal}
\usepackage[magyar]{babel}
\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}
%\usepackage{lmodern}
%\usepackage{microtype}
\begin{document}
A természettudományok az általuk vizsgált jelenségeket gyakran differenciálegyenlet-rendszerrel írják le. Ekkor fontos szemponttá válik annak eldöntése, hogy az adott rendszer stabil-e. A stabilitás hozzávetőlegesen azt jelenti, hogy a külső körülmények (kezdeti feltételek) piciny megváltoztatása nem okozza a rendszer működésének (a megoldásnak) radikális megváltozását.
\end{document}

EDIT 2: It seems that Google Docs' problem is with vectorized fonts in general. The non-T1 encoded original CM fonts also looked ugly. (The T1 encoded CM fonts are raster fonts.)

Answer 1

I don't think that making one's PDF worse just because a bad previewer isn't able to render it is the right answer. If a previewer is bad, I simply don't use it.

However, it's not difficult to prepare a personal map file that doesn't use the CM-Super fonts.

1. Copy pdftex.map in a working directory, renaming it to, say, pdftex-nosuper.map; you find the location of pdftex.map by looking in any log file created by pdflatex, but on a Unix system (and bash), just

   cp $(kpsewhich pdftex.map) .
   

   will do.

2. Open the file in a text editor

3. Remove all lines where the string cm-super appears (a Perl or sed script can do it automatically)

4. Save the file and put a copy of it in your personal tree; on a GNU/Linux system this should be in ~/texmf

   mkdir -p ~/texmf/fonts/map/pdftex
   cp pdftex-nosuper.map ~/texmf/fonts/map/pdftex/
   

5. Put the line

   \pdfmapfile{pdftex-nosuper.map}
   

   at the start of your LaTeX document.

When pdftex will process your document, bitmaps for the fonts covered by the CM-Super fonts will be created and downloaded in the PDF output.

Note: if you're using MacTeX on Mac OS X, then instead of the ~/texmf prefix, use ~/Library/texmf. With TeX Live on Windows, the commands for creating the directory and doing copies of files will be different. For the correct location with MiKTeX, consult the documentation.