SheenFigure

SheenFigure aims to implement the advanced typographic tables of OpenType specification available at https://www.microsoft.com/en-us/Typography/OpenTypeSpecification.aspx along with script specific shaping engines available at https://www.microsoft.com/en-us/Typography/SpecificationsOverview.aspx. Currently, it only supports Arabic script and a subset of GDEF, GSUB and GPOS tables. The support is intended to increase in each newer versions of the library.

Here are some of the advantages of SheenFigure.

• Object based
• Designed to be thread safe
• Lightweight API for interaction
• Clear differentiation of public and private API
• Thoroughly tested

Dependency

SheenFigure only depends on SheenBidi in order to support UTF-8, UTF-16 and UTF-32 string encodings. Other than that, it only uses standard C library headers stddef.h, stdint.h, stdlib.h and string.h.

Configuration

The configuration options are available in Headers/SFConfig.h.

• SF_CONFIG_UNITY builds the library as a single module and lets the compiler make decisions to inline functions.

Compiling

SheenFigure can be compiled with any C compiler. The best way for compiling is to add all the files in an IDE and hit build. The only thing to consider however is that if SF_CONFIG_UNITY is enabled then only Source/SheenFigure.c should be compiled.

Public API

Here is a glimpse of public API in the form of UML class diagram.

Conformance

Following are the tables implemented by SheenFigure.

OpenType Layout Common Table Formats

GDEF (Glyph Definition Table)

GPOS (Glyph Positioning Table)

GSUB (Glyph Substitution Table)