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..04-Jun-20144 KiB

BLACKLIST.txt04-Jun-20142.5 KiB

cff_type2_charstring_test.cc04-Jun-201444.1 KiB

file-stream.h04-Jun-20141.1 KiB

idempotent.cc04-Jun-20145.4 KiB

layout_common_table_test.cc04-Jun-201421.3 KiB

ot-sanitise.cc04-Jun-20141.5 KiB

perf.cc04-Jun-20142.1 KiB

README04-Jun-20147.4 KiB

SConstruct04-Jun-20142.2 KiB

side-by-side.cc04-Jun-20147.7 KiB

table_dependencies_test.cc04-Jun-20142.2 KiB

test_malicious_fonts.sh04-Jun-2014968

test_unmalicious_fonts.sh04-Jun-20141.3 KiB

validator-checker.cc04-Jun-20144.6 KiB

README

1------------------------------------------------------------------------------
2ot-sanitise - TTF/OTF font transcoder
3
4Description:
5  ot-sanitise is a program which validates and transcodes a truetype or
6  opentype font file using the OTS library:
7
8      transcoded_font = ValidateAndTranscode(original_font);
9      if (validation_error)
10        PrintErrorAndExit;
11      OutputToStdout(transcoded_font);
12
13Usage:
14  $ ./ot-sanitise ttf_or_otf_file > transcoded_file
15
16Example:
17  $ ./ot-sanitise sample.otf > transcoded_sample.otf
18  $ ./ot-sanitise malformed.ttf > transcoded_malformed.ttf
19  WARNING at ots/src/ots.cc:158: bad range shift
20  ERROR at ots/src/ots.cc:199 (bool<unnamed>::do_ots_process(ots::OpenTypeFile*, ots::OTSStream*, const uint8_t*, size_t))
21  Failed to sanitise file!
22  $
23
24------------------------------------------------------------------------------
25idempotent - TTF/OTF font transcoder (for OTS debugging)
26
27Description:
28  idempotent is a program which validates and transcodes a truetype or opentype
29  font file using OTS. This tool transcodes the original font twice and then
30  verifies that the two transcoded fonts are identical:
31
32      t1 = ValidateAndTranscode(original_font);
33      if (validation_error)
34        PrintErrorAndExit;
35      t2 = ValidateAndTranscode(t1);
36      if (validation_error)
37        PrintErrorAndExit;
38      if (t1 != t2)
39        PrintErrorAndExit;
40
41  This tool is basically for OTS developers.
42
43Usage:
44  $ ./idempotent ttf_or_otf_file
45
46Example:
47  $ ./idempotent sample.otf
48  $ ./idempotent malformed.ttf
49  WARNING at ots/src/ots.cc:158: bad range shift
50  ERROR at ots/src/ots.cc:199 (bool<unnamed>::do_ots_process(ots::OpenTypeFile*, ots::OTSStream*, const uint8_t*, size_t))
51  Failed to sanitise file!
52  $
53
54------------------------------------------------------------------------------
55validator_checker - font validation checker
56
57Description:
58  validator_checker is a program which is intended to validate malformed fonts.
59  If the program detects that the font is invalid, it prints "OK" and returns
60  with 0 (success). If it coulndn't detect any errors, the program then opens
61  the transcoded font and renders some characters using FreeType2:
62
63      transcoded_font = ValidateAndTranscode(malicious_font);
64      if (validation_error)
65        Print("OK");
66      OpenAndRenderSomeCharacters(transcoded_font);  # may cause SIGSEGV
67      Print("OK");
68
69  If SEGV doesn't raise inside FreeType2 library, the program prints "OK" and
70  returns with 0 as well. You should run this tool under the catchsegv or
71  valgrind command so that you can easily verify that all transformed fonts
72  don't crash the library (see the example below).
73
74Usage:
75  $ catchsegv ./validator_checker malicous_ttf_or_otf_file
76
77Example:
78  $ for f in malformed/*.ttf ; do catchsegv ./validator-checker "$f" ; done
79  OK: the malicious font was filtered: malformed/1.ttf
80  OK: the malicious font was filtered: malformed/2.ttf
81  OK: FreeType2 didn't crash: malformed/3.ttf
82  OK: the malicious font was filtered: malformed/4.ttf
83  $
84
85------------------------------------------------------------------------------
86perf - performance checker
87
88Description:
89  perf is a program which validates and transcodes a truetype or opentype font
90  file N times using OTS, then prints the elapsed time:
91
92      for (N times)
93        ValidateAndTranscode(original_font);
94      Print(elapsed_time_in_us / N);
95
96Usage:
97  $ ./perf ttf_or_otf_file
98
99Example:
100  $ ./perf sample.ttf 
101  903 [us] sample.ttf (139332 bytes, 154 [byte/us])
102  $ ./perf sample-bold.otf
103  291 [us] sample-bold.otf (150652 bytes, 517 [byte/us])
104
105------------------------------------------------------------------------------
106side-by-side - font quality checker
107
108Description:
109  side-by-side is a program which renders some characters (ASCII, Latin-1, CJK)
110  using both original font and transcoded font and checks that the two rendering
111  results are exactly equal.
112
113  The following Unicode characters are used during the test:
114    0x0020 - 0x007E  // Basic Latin
115    0x00A1 - 0x017F  // Latin-1
116    0x1100 - 0x11FF  // Hangul
117    0x3040 - 0x309F  // Japanese HIRAGANA letters
118    0x3130 - 0x318F  // Hangul
119    0x4E00 - 0x4F00  // CJK Kanji/Hanja
120    0xAC00 - 0xAD00  // Hangul
121
122  This tool uses FreeType2 library.
123  Note: This tool doesn't check kerning (GPOS/kern) nor font substitution
124  (GSUB). These should be tested in Layout tests if necessary.
125
126Usage:
127  $ ./side-by-side ttf_or_otf_file
128
129Example:
130  $ ./side-by-side linux/kochi-gothic.ttf  # no problem
131  $ ./side-by-side free/kredit1.ttf        # this is known issue of OTS.
132  bitmap metrics doesn't match! (14, 57), (37, 45)
133  EXPECTED:
134                
135    +#######*.  
136   +##########+ 
137  .###+.#.   .#.
138  *#*   #     #*
139  ##.   #     ##
140  ##    #     ##
141  ##    #     ##
142  ##    #.    ##
143  ##.   #.   .##
144  ##.   #.   .##
145  *#+   *+   +#*
146  *#+   *+   +#*
147  *#+   *+   +#*
148  *#+   *+   +#*
149  *#+   *+   *#*
150  *#+   ++   *#+
151  +#*   +*   *#+
152  +#*   +*   *#+
153  +#*   +*   *#+
154  +#*   +*   ##.
155  +#*   +*   ##.
156  .##   .#   ## 
157  .##   .#   ## 
158  .##   .#   ## 
159   ##    #   ## 
160   ##    #   ## 
161   ##    #  .## 
162   ##    #  .## 
163   ##   .#+ +#* 
164   ##  +######* 
165   ##.+#######* 
166   *##########* 
167   +##########+ 
168    #########*  
169    .########   
170      +####+    
171                
172                
173                
174                
175                
176                
177    .*######*   
178   +##*.*#####  
179  .##+.#+    +# 
180  *#* ##      #+
181  ##*###      ##
182  ######      ##
183  ##+.##+    +##
184  ##  ##########
185  ##  +#########
186  ##   +########
187  *#. .########*
188  .#* #########.
189   +##########+ 
190    +*######*   
191  
192  ACTUAL:
193
194    .*##*+                             
195   +##+.##*.                           
196  .#* .##.+#*                          
197  *#  ###   *#+                        
198  #*######+  .*#+                      
199  #########*.  +#*.                    
200  ###########*   +#*                   
201  *############+   *#+                 
202  +##############.  .##.               
203   *##############*   +#*              
204    +###############+   *#+            
205      *###############+  .*#+          
206       .###############*.  +#*.        
207         +###############*   +#*       
208           *###############+   *#+     
209            .*###############+  .*#+   
210              +###############*.  +#*  
211                +###############*   ** 
212                  *###############+  #+
213                   .###############* ##
214                     +############+  ##
215                       +########*   .##
216                        .######.   +###
217                       +#####+   .*#..#
218                     +#####*    *###..#
219                    *#####.   +#######*
220                  +#####+   .*########.
221                +#####*    +#########* 
222               *#####.   +##########+  
223             +#####+    *#########*.   
224           .#####*    +##########+     
225          *#####.   +##########*       
226        +#####+    *#########*.        
227      .#####*    +##########+          
228     *#####+   +##########*            
229   .#*++#+    *#########*.             
230  .#+  ##   +##########+               
231  ****###+.##########*                 
232  ##################.                  
233  ###+  *#########+                    
234  ##   +########*                      
235  *#+ *########.                       
236   ##.#######+                         
237   +#######*                           
238     *###*.                            
239  
240  
241  Glyph mismatch! (file: free/kredit1.ttf, U+0021, 100pt)!
242  $
243------------------------------------------------------------------------------
244