Python DesignSpaceDocument.loadSourceFonts方法代码示例

# 需要导入模块: from fontTools.designspaceLib import DesignSpaceDocument [as 别名]
# 或者: from fontTools.designspaceLib.DesignSpaceDocument import loadSourceFonts [as 别名]
    def from_designspace(
        cls,
        designspace: designspaceLib.DesignSpaceDocument,
        round_geometry: bool = True,
    ):
        """Instantiates a new data class from a Designspace object."""
        if designspace.default is None:
            raise ValueError(
                "Can't generate UFOs from this designspace: no default font."
            )

        designspace.loadSourceFonts(ufoLib2.Font.open)

        glyph_names: Set[str] = set()
        for source in designspace.sources:
            glyph_names.update(source.font.keys())

        # Construct Variators
        axis_bounds: Dict[str, Tuple[float, float, float]] = {}  # Design space!
        axis_order: List[str] = []
        weight_width_axes = {}
        for axis in designspace.axes:
            axis_order.append(axis.name)
            axis_bounds[axis.name] = (
                axis.map_forward(axis.minimum),
                axis.map_forward(axis.default),
                axis.map_forward(axis.maximum),
            )
            if axis.tag in ("wght", "wdth"):
                weight_width_axes[axis.tag] = axis

        masters_info = collect_info_masters(designspace, axis_bounds)
        info_mutator = Variator.from_masters(masters_info, axis_order)

        masters_kerning = collect_kerning_masters(designspace, axis_bounds)
        kerning_mutator = Variator.from_masters(masters_kerning, axis_order)

        default_font = designspace.findDefault().font
        glyph_mutators: Dict[str, Variator] = {}
        glyph_name_to_unicodes: Dict[str, List[int]] = {}
        for glyph_name in glyph_names:
            items = collect_glyph_masters(designspace, glyph_name, axis_bounds)
            glyph_mutators[glyph_name] = Variator.from_masters(items, axis_order)
            glyph_name_to_unicodes[glyph_name] = default_font[glyph_name].unicodes

        # Construct defaults to copy over
        copy_feature_text: str = default_font.features.text
        copy_groups: Mapping[str, List[str]] = default_font.groups
        copy_info: ufoLib2.objects.Info = default_font.info
        copy_lib: Mapping[str, Any] = default_font.lib

        # The list of glyphs not to export and decompose where used as a component is
        # supposed to be taken from the Designspace when a Designspace is used as the
        # starting point of the compilation process. It should be exported to all
        # instance libs, where the ufo2ft compilation functions will pick it up.
        skip_export_glyphs = designspace.lib.get("public.skipExportGlyphs", [])

        return cls(
            axis_bounds,
            copy_feature_text,
            copy_groups,
            copy_info,
            copy_lib,
            designspace.rules,
            glyph_mutators,
            glyph_name_to_unicodes,
            info_mutator,
            kerning_mutator,
            round_geometry,
            skip_export_glyphs,
            weight_width_axes,
        )