Some texts missing on WinXP

[vyv03354]

Examples:
http://www.courts.go.jp/hanrei/pdf/20130226130259.pdf
http://www.ugokotsu.co.jp/ug/rosen/jikoku/yo01.pdf

Two problems here:

1. Characters are not properly positioned. (see Fix spacing calculation of TJ operator #2844)
2. On WinXP, embedded fonts are not usable by platform. Texts are completely garbled.

[vyv03354]

It looks like that the first problem is a regression of #2505.
good: c05f073 (0.7.40)
bad: bf0abd6 (0.7.43)

[vyv03354]

I created a font file from src: url(data:...) and tried to open it with Windows XP built-in Font Viewer.
Usually it fails to open, occasionally it opens. Strange...

[vyv03354]

Additional example:
http://www.jica.go.jp/hiroba/menu/ngo_enhance/pdf/group_nagoyango.pdf
If I turn off HWA, the text is missing even on Win8. Apparently GDI dislikes the CFF fonts generated by PDF.js.

[vyv03354]

http://www.jica.go.jp/hiroba/menu/ngo_enhance/pdf/group_nagoyango.pdf was a different problem. Filed #2917.

[vyv03354]

Works for me with the latest development build (0.7.339).