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Flatten components option #438

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merged 8 commits into from
Dec 10, 2020
Merged

Flatten components option #438

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17e95e0
Add flattenComponents option to compileTTF
simoncozens Dec 7, 2020
895d87e
Tests for flattening components
simoncozens Dec 7, 2020
5be6083
Always decompose
simoncozens Dec 9, 2020
c1cc059
Allow flattening interpolatable and variable TTFs
simoncozens Dec 9, 2020
2c2a7ce
Swap order of filters
simoncozens Dec 9, 2020
3540dc0
Process multiple ufos
simoncozens Dec 9, 2020
80bd026
More tests
simoncozens Dec 9, 2020
b0c9673
flattenComponents=None->False
simoncozens Dec 10, 2020
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2 changes: 2 additions & 0 deletions Lib/ufo2ft/__init__.py
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Original file line number Diff line number Diff line change
Expand Up @@ -172,6 +172,7 @@ def compileTTF(
rememberCurveType=True,
removeOverlaps=False,
overlapsBackend=None,
flattenComponents=None,
inplace=False,
layerName=None,
skipExportGlyphs=None,
Expand Down Expand Up @@ -205,6 +206,7 @@ def compileTTF(
inplace=inplace,
removeOverlaps=removeOverlaps,
overlapsBackend=overlapsBackend,
flattenComponents=flattenComponents,
convertCubics=convertCubics,
conversionError=cubicConversionError,
reverseDirection=reverseDirection,
Expand Down
15 changes: 11 additions & 4 deletions Lib/ufo2ft/preProcessor.py
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Original file line number Diff line number Diff line change
Expand Up @@ -110,7 +110,9 @@ class TTFPreProcessor(OTFPreProcessor):
"""Preprocessor for building TrueType-flavored OpenType fonts.

By default, it decomposes all the glyphs with mixed component/contour
outlines.
outlines. If the ``flattenComponents`` setting is True, glyphs with
nested components are flattened so that they have at most one level of
components.

If ``removeOverlaps`` is True, it performs a union boolean operation on
all the glyphs' contours.
Expand Down Expand Up @@ -144,6 +146,7 @@ def initDefaultFilters(
self,
removeOverlaps=False,
overlapsBackend=None,
flattenComponents=False,
convertCubics=True,
conversionError=None,
reverseDirection=True,
Expand All @@ -153,9 +156,13 @@ def initDefaultFilters(

_init_explode_color_layer_glyphs_filter(self.ufo, filters)

# len(g) is the number of contours, so we include the all glyphs
# that have both components and at least one contour
filters.append(DecomposeComponentsFilter(include=lambda g: len(g)))
if flattenComponents:
from ufo2ft.filters.flattenComponents import FlattenComponentsFilter
filters.append(FlattenComponentsFilter())
else:
# len(g) is the number of contours, so we include the all glyphs
# that have both components and at least one contour
filters.append(DecomposeComponentsFilter(include=lambda g: len(g)))

if removeOverlaps:
from ufo2ft.filters.removeOverlaps import RemoveOverlapsFilter
Expand Down
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