Comment 7 for bug 933489

Uncompressed version on which the manipulation was done. Converted to above with:

  $ pdftk emily-test-page-top-only-colourspace-operators.pdf output emily-test-page-top-only-colourspace-operators-compressed.pdf compress

in order to rebuild the stream lengths and xref. Following changes:

  1. Strip the XML metadata
  2. Use 'RG' and 'rg' operators for settings the RGB test colours; and 'G' and 'g' for the grayscale circle. Note that this will appear slightly differently on a monitor as the gamets are different, but it makes it marginally more useful as an actual test sheet since the test colours are being drawn in the right colourspace.
  3. Strip the non-free UbuntuMonoBeta embedded at the bottom. Fresh libre copies are available in the 'ttf-ubuntu-font-family' package (this leaves just subsetted UbuntuMedium).
  4. Remove the kerning overrides from the "Printer test page". It's better that if this is replaced, it still looks natural.
  5. Scatter some comments through out the drawing code to make later adjustment easier.
  6. Added some licensing information to the top: namely CC-BY-SA 3 (preferred libre content licence) and LGPL-2+ (same licence as 'cups-filters') to top.

Unfortunately the 'pdftk' rebuild is dropping that the copyright information. We can rebuild that later if required.