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188 lines
7.0 KiB
Python
188 lines
7.0 KiB
Python
import logging
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import ufo2ft
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from defcon import Font
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from ufo2ft.util import _LazyFontName
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from ufo2ft.filters.removeOverlaps import RemoveOverlapsFilter
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from fontTools.designspaceLib import DesignSpaceDocument
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from .name import getFamilyName, setFullName
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from .info import updateFontVersion
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from .glyph import findGlyphDirectives, composedGlyphIsTrivial, decomposeGlyphs
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from .stat import rebuildStatTable
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log = logging.getLogger(__name__)
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class FontBuilder:
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# def __init__(self, *args, **kwargs)
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def buildStatic(self,
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ufo, # input UFO as filename string or defcon.Font object
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outputFilename, # output filename string
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cff=True, # true = makes CFF outlines. false = makes TTF outlines.
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**kwargs, # passed along to ufo2ft.compile*()
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):
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if isinstance(ufo, str):
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ufo = Font(ufo)
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# update version to actual, real version. Must come after any call to setFontInfo.
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updateFontVersion(ufo, dummy=False, isVF=False)
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# decompose some glyphs
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glyphNamesToDecompose = set()
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for g in ufo:
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directives = findGlyphDirectives(g.note)
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if self._shouldDecomposeGlyph(ufo, g, directives):
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glyphNamesToDecompose.add(g.name)
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self._decompose([ufo], glyphNamesToDecompose)
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compilerOptions = dict(
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useProductionNames=True,
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inplace=True, # avoid extra copy
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removeOverlaps=True,
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overlapsBackend='pathops', # use Skia's pathops
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)
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log.info("compiling %s -> %s (%s)", _LazyFontName(ufo), outputFilename,
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"OTF/CFF-2" if cff else "TTF")
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if cff:
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font = ufo2ft.compileOTF(ufo, **compilerOptions)
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else: # ttf
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font = ufo2ft.compileTTF(ufo, **compilerOptions)
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log.debug("writing %s", outputFilename)
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font.save(outputFilename)
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def buildVariable(self,
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designspace, # designspace filename string or DesignSpaceDocument object
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outputFilename, # output filename string
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cff=False, # if true, builds CFF-2 font, else TTF
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**kwargs, # passed along to ufo2ft.compileVariable*()
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):
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designspace = self._loadDesignspace(designspace)
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# check in the designspace's <lib> element if user supplied a custom featureWriters
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# configuration; if so, use that for all the UFOs built from this designspace.
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featureWriters = None
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if ufo2ft.featureWriters.FEATURE_WRITERS_KEY in designspace.lib:
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featureWriters = ufo2ft.featureWriters.loadFeatureWriters(designspace)
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compilerOptions = dict(
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useProductionNames=True,
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featureWriters=featureWriters,
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inplace=True, # avoid extra copy
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**kwargs
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)
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if log.isEnabledFor(logging.INFO):
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log.info("compiling %s -> %s (%s)", designspace.path, outputFilename,
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"OTF/CFF-2" if cff else "TTF")
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if cff:
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font = ufo2ft.compileVariableCFF2(designspace, **compilerOptions)
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else:
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font = ufo2ft.compileVariableTTF(designspace, **compilerOptions)
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# Rename fullName record to familyName (VF only).
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# Note: Even though we set openTypeNameCompatibleFullName it seems that the fullName
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# record is still computed by fonttools, so we override it here.
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setFullName(font, getFamilyName(font))
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# rebuild STAT table to correct VF instance information
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rebuildStatTable(font, designspace)
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log.debug("writing %s", outputFilename)
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font.save(outputFilename)
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def _decompose(self, ufos, glyphNamesToDecompose):
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# Note: Used for building both static and variable fonts
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if glyphNamesToDecompose:
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if log.isEnabledFor(logging.DEBUG):
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log.debug('Decomposing glyphs:\n %s', "\n ".join(glyphNamesToDecompose))
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elif log.isEnabledFor(logging.INFO):
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log.info('Decomposing %d glyphs', len(glyphNamesToDecompose))
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decomposeGlyphs(ufos, glyphNamesToDecompose)
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def _shouldDecomposeGlyph(self, ufo, g, directives):
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# Note: Used for building both static and variable fonts
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if 'decompose' in directives:
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return True
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if g.components:
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if g.name in ufo.componentReferences:
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# This means that the glyph...
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# a) has component instances and
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# b) is itself a component used by other glyphs as instances.
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# Decomposing these glyphs satisfies the fontbakery check
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# com.google.fonts/check/glyf_nested_components
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# "Check glyphs do not have components which are themselves components."
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# https://github.com/googlefonts/fontbakery/issues/2961
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# https://github.com/arrowtype/recursive/issues/412
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#
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# ufo.componentReferences:
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# A dict of describing the component relationships in the font’s main layer.
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# The dictionary is of form {"base_glyph_name": ["ref_glyph_name"]}.
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log.debug("decompose %r (glyf_nested_components)" % g.name)
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return True
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if not composedGlyphIsTrivial(g):
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return True
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return False
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def _loadDesignspace(self, designspace):
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# Note: Only used for building variable fonts
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log.info("loading designspace sources")
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if isinstance(designspace, str):
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designspace = DesignSpaceDocument.fromfile(designspace)
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else:
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# copy that we can mess with
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designspace = DesignSpaceDocument.fromfile(designspace.path)
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masters = designspace.loadSourceFonts(opener=Font)
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# masters = [s.font for s in designspace.sources] # list of UFO font objects
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# Update the default source's full name to not include style name
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defaultFont = designspace.default.font
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defaultFont.info.openTypeNameCompatibleFullName = defaultFont.info.familyName
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log.info("Preprocessing glyphs")
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# find glyphs subject to decomposition and/or overlap removal
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# TODO: Find out why this loop is SO DAMN SLOW. It might just be so that defcon is
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# really slow when reading glyphs. Perhaps we can sidestep defcon and just
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# read & parse the .glif files ourselves.
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glyphNamesToDecompose = set() # glyph names
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glyphsToRemoveOverlaps = set() # glyph objects
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for ufo in masters:
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# Note: ufo is of type defcon.objects.font.Font
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# update font version
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updateFontVersion(ufo, dummy=False, isVF=True)
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for g in ufo:
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directives = findGlyphDirectives(g.note)
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if self._shouldDecomposeGlyph(ufo, g, directives):
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glyphNamesToDecompose.add(g.name)
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if 'removeoverlap' in directives:
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if g.components and len(g.components) > 0:
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glyphNamesToDecompose.add(g.name)
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glyphsToRemoveOverlaps.add(g)
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self._decompose(masters, glyphNamesToDecompose)
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# remove overlaps
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if glyphsToRemoveOverlaps:
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rmoverlapFilter = RemoveOverlapsFilter(backend='pathops')
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rmoverlapFilter.start()
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if log.isEnabledFor(logging.DEBUG):
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log.debug(
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'Removing overlaps in glyphs:\n %s',
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"\n ".join(set([g.name for g in glyphsToRemoveOverlaps])),
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)
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elif log.isEnabledFor(logging.INFO):
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log.info('Removing overlaps in %d glyphs', len(glyphsToRemoveOverlaps))
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for g in glyphsToRemoveOverlaps:
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rmoverlapFilter.filter(g)
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# handle control back to fontmake
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return designspace
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