Text layout with any font other than msgothic.ttc is wrong.

[eglaysher]

The kerning here is so bad that we draw the next letter over the last letter.

[eglaysher]

OK, so here's my current theory on what's going on:

If you look in s/s/b/text_window.cc, you'll see that line breaking is all pixel based. However, in the Gameexe.ini files, text windows are sized in full-width characters.

The current font advancement code in text_window.cc actually is putting the exact same number of Roman characters on the same line as the official RealLive.exe. However, the problem comes from all the Japanese fonts I've tested on Linux not having monospace Roman character information. (!)

Possible work around I'll have to think about for a bit: change the line breaking algorithm from being pixel based to character based. Right now, we ignore the width of the non-evenly monospaced Roman characters and lay them out so that they fit 2 * [number of full-width characters] in a line. Instead break by character count; the line can be laid out however the characters fall, but when dealing with Roman characters, we only allow 2n characters on a line. Possible downsides: this could theoretically break Japanese editions of these games, since the whole line breaking thing is very subtle.

[eglaysher]

So coming back to this, here's the status:

• Playing the English edition of Planetarian, using tip of tree rlvm...
  • ...using the proprietary msgothic.ttc as the font, which Linux users won't have, the text in Planetarian matches the grid layout of the official RealLive.exe perfectly. msgothic.ttc has monospaced Roman characters.
  • ...using the default Japanese mona font on Ubuntu, the characters partially print on top of each other, because all the Japanese fonts I've tested on Linux are monospace with Japanese characters, but proportionally spaced with Roman characters.
• Playing the English edition of Clannad, using tip of tree rlvm...
  • ...using the proprietary msgothic.ttc doesn't have font overwrite, but does show off line-breaking problems.
  • ...using the Japanese mona font on Ubuntu, we have both line breaking bugs and text overwrite.

So there are really two bugs here:

• We need to deal with fonts that are simultaneously proportional and monospace depending on the character set (which is causing the printing on top of each other bug).
• It appears that Clannad uses normal Western line breaking. If I add logging to the console on each character output, Planetarian manually outputs spaces at the end of lines to overflow. However, on Clannad, there doesn't appear to be any manual hard brakes or extra spacing; it's breaking the text on its own. Filed #71 for this.