Improve resolution of screenshots

[LinqLover]

EPS? SVG? Need to figure out.

[LinqLover]

Results from a first spike:

• SVG:
  • Squeak has no built-in SVG-support
  • SVGMorph can file in/file out SVG files, but apparently cannot convert regular morphs into SVG files
  • also has limited transparency support

• EPS:

  • Squeak has built-in EPS support (Morph>>#exportAsEPS) - however, there are some limitations:
  • default font is hardcoded to Helvetica (PostscriptCanvas class>>#fontsForDejaVuSans)
  • the wrong font leads to misplaced text selections
  • some encoding/escaping issues for window titles and special characters
  • return charet is replaced by old-fashioned arrow-up
  • apparently, EPS (in Squeak) cannot handle transparency, making shadows and transparency look awkward
  • suspicious: further encoding/escaping issues: after converting the resulting EPS into an SVG file using different services, the resulting SVG cannot be rendered in Chromium (?)

  

In the end, I see three possible options:

1. Write a Morphic-to-SVG converter
   • likely very (too?) expensive
   • pro: benefit for further use (SVG is a widely spread format)
2. Fix Squeak's EPS support
   • would require further spiking
3. Just use high-dpi screenshots (e.g., 200%)
   • since Squeak 6.0, the high-dpi mode works commonly flawless
   • need to change scale factor in SBE-Extract and adjust Morphic examples to use px/pt
     • the latter might confuse beginners
   • con: no accessible/searchable screenshots

[LinqLover]

• Use scaling: for 300 dpi, try with 200%
• make sure that px does not appear in samples