PangoEngine:
PangoEngineClass:
PangoEngineInfo: @id: a unique string ID for the engine. @engine_type: a string identifying the engine type. @render_type: a string identifying the render type. @scripts: array of scripts this engine supports. @n_scripts: number of items in @scripts.
PangoEngineLang:
PangoEngineLangClass: @script_break: Provides a custom implementation of pango_break(). If %NULL, pango_default_break() is used instead. If not %NULL, for Pango versions before 1.16 (module interface version before 1.6.0), this was called instead of pango_default_break(), but in newer versions, pango_default_break() is always called and this is called after that to allow tailoring the breaking results.
PangoEngineScriptInfo @script: a #PangoScript. The value %PANGO_SCRIPT_COMMON has the special meaning here of "all scripts" @langs: a semicolon separated list of languages that this engine handles for this script. This may be empty, in which case the engine is saying that it is a fallback choice for all languages for this range, but should not be used if another engine indicates that it is specific for the language for a given code point. An entry in this list of "*" indicates that this engine is specific to all languages for this range.
PangoEngineShape
PangoEngineShapeClass: @script_shape: Given a font, a piece of text, and a #PangoAnalysis structure, converts characters to glyphs and positions the resulting glyphs. The results are stored in the #PangoGlyphString that is passed in. (The implementation should resize it appropriately using pango_glyph_string_set_size()). All fields of the @log_clusters and @glyphs array must be filled in, with the exception that Pango will automatically generate <literal>glyphs->glyphsi.attr.is_cluster_start</literal> using the @log_clusters array. Each input character must occur in one of the output logical clusters; if no rendering is desired for a character, this may involve inserting glyphs with the #PangoGlyph ID #PANGO_GLYPH_EMPTY, which is guaranteed never to render. If the shaping fails for any reason, the shaper should return with an empty (zero-size) glyph string. If the shaper has not set the size on the glyph string yet, simply returning signals the failure too. @covers: Returns the characters that this engine can cover with a given font for a given language. If not overridden, the default implementation simply returns the coverage information for the font itself unmodified.