4 write a platform-independent GUI
5 -> direct control over `actions'
6 -> preview similar to ftgrid
10 ----------------------
12 improve handling of GDI ClearType by snapping to the pixel grid (this is,
13 integer coordinates of horizontal segments)
18 control `gasp' table; Adam Twardoch suggest the following:
20 1. Calculate "gaspstem", i.e. the most common thickness of horizontal
21 stems (y direction distances) for lowercase Latin letters.
22 2. If gaspstem <= 0.03 * upm, apply gasp symmetric smoothing across the
23 entire range (rangeMaxPPEM 0xFFFF, value 15)
24 3. Else, calculate gaspthreshold as follows:
25 ceil(1.33 * upm / gaspstem) - 1
26 4. Apply no symmetric smoothing up to the gaspthreshold ppem (rangeMaxPPEM
27 gaspthreshold, value 7), and apply symmetric smoothing above.
29 In addition, ttfautohint should provide a commandline parameter that
30 allows the user to override the automatic logic. If that parameter = 0,
31 then gasp value 15 should be applied across the entire range. If the
32 parameter > 0, then up to that parameter value the gasp value 7 should be
33 applied, and gasp value 15 should be applied above.
35 disable hinting at large ppem values (> ~2000) to avoid numeric overflows
37 control activation threshold of blue zone widths
39 control the width of blue zones
41 handle normal and bold fonts differently; cf. Infinality patches
43 control the minimum stem width
45 try to `embolden' fonts at small sizes to avoid drop-outs; cf. Infinality
48 implement `x-height-snapping-exceptions' and `pre-hinting'
50 allow hinting of single glyphs, using a config file which holds the global
53 better handling of `incomplete' fonts (this is, fonts which lack the minimum
54 set of glyphs necessary to determine the blue zones)
60 correctly set `lowestRecPPEM' field in `head'
64 apply hinting in x direction also?
65 -> warper: shifting with and without scaling
66 -> `standard' autofit hinting
68 try to reduce size of hints by handling strong points separately
70 add a config and/or command file for batch handling
72 warn against overwrite of output file?
74 reduce output size of option -p:
75 1. compare outline rendered at EM value with unhinted outline
76 2. pre-hint only if 1. differs more than given threshold (default 0.5%?)
82 add CJK autohinting module
83 add Hebrew autohinting module
85 instead of emitting bytecode, write the hints as a VTT or FontLab script
93 testing with Windows font checker
95 man page for ttfautohint library