1OTS-SIDE-BY-SIDE(1)              User Commands             OTS-SIDE-BY-SIDE(1)
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NAME

6       ots-side-by-side - font quality checker
7

SYNOPSIS

9       ots-side-by-side FONT_FILE
10

DESCRIPTION

12       ots-side-by-side  is  a  program  which renders some characters (ASCII,
13       Latin-1, CJK) using both original font and transcoded font  and  checks
14       that the two rendering results are exactly equal.
15
16       The following Unicode characters are used during the test:
17
18              0x0020 - 0x007E  // Basic Latin
19              0x00A1 - 0x017F  // Latin-1
20              0x1100 - 0x11FF  // Hangul
21              0x3040 - 0x309F  // Japanese HIRAGANA letters
22              0x3130 - 0x318F  // Hangul
23              0x4E00 - 0x4F00  // CJK Kanji/Hanja
24              0xAC00 - 0xAD00  // Hangul
25
26       This tool uses FreeType library.
27
28       Note: This tool doesn’t check kerning (GPOS/kern) nor font substitution
29       (GSUB).  These should be tested in Layout tests if necessary.
30

EXAMPLES

32              $ ./ots-side-by-side linux/kochi-gothic.ttf  # no problem
33              $ ./ots-side-by-side free/kredit1.ttf        # this is known issue of OTS.
34              bitmap metrics doesn't match! (14, 57), (37, 45)
35              EXPECTED:
36
37                +#######*.
38               +##########+
39              .###+.#.   .#.
40              *#*   #     #*
41              ##.   #     ##
42              ##    #     ##
43              ##    #     ##
44              ##    #.    ##
45              ##.   #.   .##
46              ##.   #.   .##
47              *#+   *+   +#*
48              *#+   *+   +#*
49              *#+   *+   +#*
50              *#+   *+   +#*
51              *#+   *+   *#*
52              *#+   ++   *#+
53              +#*   +*   *#+
54              +#*   +*   *#+
55              +#*   +*   *#+
56              +#*   +*   ##.
57              +#*   +*   ##.
58              .##   .#   ##
59              .##   .#   ##
60              .##   .#   ##
61               ##    #   ##
62               ##    #   ##
63               ##    #  .##
64               ##    #  .##
65               ##   .#+ +#*
66               ##  +######*
67               ##.+#######*
68               *##########*
69               +##########+
70                #########*
71                .########
72                  +####+
73
74
75
76
77
78
79                .*######*
80               +##*.*#####
81              .##+.#+    +#
82              *#* ##      #+
83              ##*###      ##
84              ######      ##
85              ##+.##+    +##
86              ##  ##########
87              ##  +#########
88              ##   +########
89              *#. .########*
90              .#* #########.
91               +##########+
92                +*######*
93
94              ACTUAL:
95
96                .*##*+
97               +##+.##*.
98              .#* .##.+#*
99              *#  ###   *#+
100              #*######+  .*#+
101              #########*.  +#*.
102              ###########*   +#*
103              *############+   *#+
104              +##############.  .##.
105               *##############*   +#*
106                +###############+   *#+
107                  *###############+  .*#+
108                   .###############*.  +#*.
109                     +###############*   +#*
110                       *###############+   *#+
111                        .*###############+  .*#+
112                          +###############*.  +#*
113                            +###############*   **
114                              *###############+  #+
115                               .###############* ##
116                                 +############+  ##
117                                   +########*   .##
118                                    .######.   +###
119                                   +#####+   .*#..#
120                                 +#####*    *###..#
121                                *#####.   +#######*
122                              +#####+   .*########.
123                            +#####*    +#########*
124                           *#####.   +##########+
125                         +#####+    *#########*.
126                       .#####*    +##########+
127                      *#####.   +##########*
128                    +#####+    *#########*.
129                  .#####*    +##########+
130                 *#####+   +##########*
131               .#*++#+    *#########*.
132              .#+  ##   +##########+
133              ****###+.##########*
134              ##################.
135              ###+  *#########+
136              ##   +########*
137              *#+ *########.
138               ##.#######+
139               +#######*
140                 *###*.
141
142
143              Glyph mismatch! (file: free/kredit1.ttf, U+0021, 100pt)!
144

REPORTING BUGS

146       Report bugs to  <https://github.com/khaledhosny/ots/issues>
147

SEE ALSO

149       ots-idempotent(1),   ots-perf(1),    ots-sanitize(1),    ots-validator-
150       checker(1)
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154OpenType Sanitizer                 May 2021                OTS-SIDE-BY-SIDE(1)