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Unified Diff: third_party/ots/test/README

Issue 797183002: Revert of Updating OTS repo from https://github.com/khaledhosny/ots.git (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@master
Patch Set: Created 6 years ago
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Index: third_party/ots/test/README
diff --git a/third_party/ots/test/README b/third_party/ots/test/README
deleted file mode 100644
index f634e069592de9239bd84ed04c06c3926be1ad5d..0000000000000000000000000000000000000000
--- a/third_party/ots/test/README
+++ /dev/null
@@ -1,243 +0,0 @@
-------------------------------------------------------------------------------
-ot-sanitise - TTF/OTF font validator/transcoder
-
-Description:
- ot-sanitise is a program which validates and/or transcodes a truetype or
- opentype font file using the OTS library:
-
- transcoded_font = ValidateAndTranscode(original_font);
- if (validation_error)
- PrintErrorAndExit;
- OutputToStdout(transcoded_font);
-
-Usage:
- $ ./ot-sanitise ttf_or_otf_file [transcoded_file]
-
-Example:
- $ ./ot-sanitise sample.otf transcoded_sample.otf
- $ ./ot-sanitise malformed.ttf
- WARNING at ots/src/ots.cc:158: bad range shift
- ERROR at ots/src/ots.cc:199 (bool<unnamed>::do_ots_process(ots::OpenTypeFile*, ots::OTSStream*, const uint8_t*, size_t))
- Failed to sanitise file!
- $
-
-------------------------------------------------------------------------------
-idempotent - TTF/OTF font transcoder (for OTS debugging)
-
-Description:
- idempotent is a program which validates and transcodes a truetype or opentype
- font file using OTS. This tool transcodes the original font twice and then
- verifies that the two transcoded fonts are identical:
-
- t1 = ValidateAndTranscode(original_font);
- if (validation_error)
- PrintErrorAndExit;
- t2 = ValidateAndTranscode(t1);
- if (validation_error)
- PrintErrorAndExit;
- if (t1 != t2)
- PrintErrorAndExit;
-
- This tool is basically for OTS developers.
-
-Usage:
- $ ./idempotent ttf_or_otf_file
-
-Example:
- $ ./idempotent sample.otf
- $ ./idempotent malformed.ttf
- WARNING at ots/src/ots.cc:158: bad range shift
- ERROR at ots/src/ots.cc:199 (bool<unnamed>::do_ots_process(ots::OpenTypeFile*, ots::OTSStream*, const uint8_t*, size_t))
- Failed to sanitise file!
- $
-
-------------------------------------------------------------------------------
-validator_checker - font validation checker
-
-Description:
- validator_checker is a program which is intended to validate malformed fonts.
- If the program detects that the font is invalid, it prints "OK" and returns
- with 0 (success). If it coulndn't detect any errors, the program then opens
- the transcoded font and renders some characters using FreeType2:
-
- transcoded_font = ValidateAndTranscode(malicious_font);
- if (validation_error)
- Print("OK");
- OpenAndRenderSomeCharacters(transcoded_font); # may cause SIGSEGV
- Print("OK");
-
- If SEGV doesn't raise inside FreeType2 library, the program prints "OK" and
- returns with 0 as well. You should run this tool under the catchsegv or
- valgrind command so that you can easily verify that all transformed fonts
- don't crash the library (see the example below).
-
-Usage:
- $ catchsegv ./validator_checker malicous_ttf_or_otf_file
-
-Example:
- $ for f in malformed/*.ttf ; do catchsegv ./validator-checker "$f" ; done
- OK: the malicious font was filtered: malformed/1.ttf
- OK: the malicious font was filtered: malformed/2.ttf
- OK: FreeType2 didn't crash: malformed/3.ttf
- OK: the malicious font was filtered: malformed/4.ttf
- $
-
-------------------------------------------------------------------------------
-perf - performance checker
-
-Description:
- perf is a program which validates and transcodes a truetype or opentype font
- file N times using OTS, then prints the elapsed time:
-
- for (N times)
- ValidateAndTranscode(original_font);
- Print(elapsed_time_in_us / N);
-
-Usage:
- $ ./perf ttf_or_otf_file
-
-Example:
- $ ./perf sample.ttf
- 903 [us] sample.ttf (139332 bytes, 154 [byte/us])
- $ ./perf sample-bold.otf
- 291 [us] sample-bold.otf (150652 bytes, 517 [byte/us])
-
-------------------------------------------------------------------------------
-side-by-side - font quality checker
-
-Description:
- side-by-side is a program which renders some characters (ASCII, Latin-1, CJK)
- using both original font and transcoded font and checks that the two rendering
- results are exactly equal.
-
- The following Unicode characters are used during the test:
- 0x0020 - 0x007E // Basic Latin
- 0x00A1 - 0x017F // Latin-1
- 0x1100 - 0x11FF // Hangul
- 0x3040 - 0x309F // Japanese HIRAGANA letters
- 0x3130 - 0x318F // Hangul
- 0x4E00 - 0x4F00 // CJK Kanji/Hanja
- 0xAC00 - 0xAD00 // Hangul
-
- This tool uses FreeType2 library.
- Note: This tool doesn't check kerning (GPOS/kern) nor font substitution
- (GSUB). These should be tested in Layout tests if necessary.
-
-Usage:
- $ ./side-by-side ttf_or_otf_file
-
-Example:
- $ ./side-by-side linux/kochi-gothic.ttf # no problem
- $ ./side-by-side free/kredit1.ttf # this is known issue of OTS.
- bitmap metrics doesn't match! (14, 57), (37, 45)
- EXPECTED:
-
- +#######*.
- +##########+
- .###+.#. .#.
- *#* # #*
- ##. # ##
- ## # ##
- ## # ##
- ## #. ##
- ##. #. .##
- ##. #. .##
- *#+ *+ +#*
- *#+ *+ +#*
- *#+ *+ +#*
- *#+ *+ +#*
- *#+ *+ *#*
- *#+ ++ *#+
- +#* +* *#+
- +#* +* *#+
- +#* +* *#+
- +#* +* ##.
- +#* +* ##.
- .## .# ##
- .## .# ##
- .## .# ##
- ## # ##
- ## # ##
- ## # .##
- ## # .##
- ## .#+ +#*
- ## +######*
- ##.+#######*
- *##########*
- +##########+
- #########*
- .########
- +####+
-
-
-
-
-
-
- .*######*
- +##*.*#####
- .##+.#+ +#
- *#* ## #+
- ##*### ##
- ###### ##
- ##+.##+ +##
- ## ##########
- ## +#########
- ## +########
- *#. .########*
- .#* #########.
- +##########+
- +*######*
-
- ACTUAL:
-
- .*##*+
- +##+.##*.
- .#* .##.+#*
- *# ### *#+
- #*######+ .*#+
- #########*. +#*.
- ###########* +#*
- *############+ *#+
- +##############. .##.
- *##############* +#*
- +###############+ *#+
- *###############+ .*#+
- .###############*. +#*.
- +###############* +#*
- *###############+ *#+
- .*###############+ .*#+
- +###############*. +#*
- +###############* **
- *###############+ #+
- .###############* ##
- +############+ ##
- +########* .##
- .######. +###
- +#####+ .*#..#
- +#####* *###..#
- *#####. +#######*
- +#####+ .*########.
- +#####* +#########*
- *#####. +##########+
- +#####+ *#########*.
- .#####* +##########+
- *#####. +##########*
- +#####+ *#########*.
- .#####* +##########+
- *#####+ +##########*
- .#*++#+ *#########*.
- .#+ ## +##########+
- ****###+.##########*
- ##################.
- ###+ *#########+
- ## +########*
- *#+ *########.
- ##.#######+
- +#######*
- *###*.
-
-
- Glyph mismatch! (file: free/kredit1.ttf, U+0021, 100pt)!
- $
-------------------------------------------------------------------------------
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