4.1.0

• update libass to 0.17.0, notably including support for LayoutRes{X,Y} headers among others
• fix copyright and licence notices
• deprecate support for manually decompressing brotli subtitles. Might be fully removed in the next release. See 4.1.0’s README.md for what to use instead.
• add new wasm-blend rendering mode which is faster than the old default of js-blend
• change default rendering mode to wasm-blend
• unify rendering mode options into a renderMode setting. Deprecate lossyRender option, this mode can now be selected via the renderMode option.
• parse and use embedded fonts
• add fallbackFont to override the default fallback
• add lazyFileLoading to opt-in to loading files, in particular fonts, lazily; requires a compatible server configuration
• add prescaleFactor, prescaleHeightLimit and maxRenderHeight options to control performance-quality trade-offs
• add dropAllAnimations
• various bugfixes

Version of included libraries:

• brotli: 1.0.9
• libexpat: 2.5.0
• fontconfig: 2.14.1
• freetype: 2.12.1
• fribidi: 1.0.12
• harfbuzz: 5.3.1
• libass: 0.17.0

Note: the attached libass-wasm-4.1.0.tgz is the binary release identical to what was uploaded to npm.

4.0.0

This release include a new Event and Style API, allow manipulation of then at run-time as well all libass API exposed to worker environment.

New functions

Wrapper

• octopusInstance.createEvent(event)
• octopusInstance.getEvents() - Print events in console, to get the events, edit this block
• octopusInstance.setEvent(event, index) - See setStyle
• octopusInstance.removeEvent()
• octopusInstance.createStyle(style)
• octopusInstance.getStyles() - Print Styles in console, to get the styles, edit this block
• octopusInstance.setStyle(style, index) - it is also possible to set the value of a single property instead of sending all values, eg.: octopusInstance.setStyle({ FontName: "Arial" }, 0) this will only set the font arial to style
• octopusInstance.removeStyle()

Worker

This most not change at all but now have two new classes, self.octObj - SubtitleOctopus Native Class Wrapper instance, which contains every internal Wasm native functions used by this library and the class libass witch contains every libass public functions.

Native Code

Because of WebIDL, I have switched from C to C++, and now have three files, SubtitleOctopus.cpp (Native Wrapper), libass.cpp (libass Wrapper) and SubOctpInterface.cpp and SubOctpInterface.js - These files are generated by WebIDL bind-gen, from SubtitleOctopus.idl - If you want to modify SubtitleOctopus.cpp and/or libass.cpp you must delete SubOctpInterface.cpp and SubOctpInterface.js and edit SubtitleOctopus.idl.

ASS_Event Object

Property	Type
Start	Number(Int64)
Duration	Number(Int64)
ReadOrder	Number
Layer	Number
Style	Number
Name	String
MarginL	Number
MarginR	Number
MarginV	Number
Effect	String
Text	String

ASS_Style Object

Property	Type
Name	String
FontName	String
FontSize	Number
PrimaryColour	Number
SecondaryColour	Number
OutlineColour	Number
BackColour	Number
Bold	Number
Italic	Number
Underline	Number
StrikeOut	Number
ScaleX	Number(Double)
ScaleY	Number(Double)
Spacing	Number(Double)
Angle	Number(Double)
BorderStyle	Number
Outline	Number(Double)
Shadow	Number(Double)
Alignment	Number
MarginL	Number
MarginR	Number
MarginV	Number
Encoding	Number
treat_fontname_as_pattern	Number
Blur	Number(Double)
Justify	Number

3.0.2

Bump version to 3.0.2

3.0.1

Changelog

• Add Support for Woff2 font files
• Add Support for Brotli Compressed Subtitle files (.ass.br)
• Bug fixes

2.2.0

Changelog

• Add Suport for Emscripten v1.38.40
• Fix build script
• Use CMake to build libexpat

Libraries Version

• libexpat/libexpat@87674af (10/13/2019 v2.2.9)
• freedesktop/fontconfig@75eadca (10/08/2019 v2.13.92)
• freetype@90a30f1 (10/10/2019 v2.10.1)
• fribidi/fribidi@79581cc (10/13/2019 v1.0.7)
• harfbuzz/harfbuzz@b0b8551 (10/13/2019 v2.6.2)
• libass/libass@be0d161 (09/26/2019 v0.14.0)

2.1.0

Version 2.1.0

2.0.1

Version 2.0.1