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from fontTools.ttLib.tables import otTables as ot
from .table_builder import TableUnbuilder
def unbuildColrV1(layerList, baseGlyphList):
layers = []
if layerList:
layers = layerList.Paint
unbuilder = LayerListUnbuilder(layers)
return {
rec.BaseGlyph: unbuilder.unbuildPaint(rec.Paint)
for rec in baseGlyphList.BaseGlyphPaintRecord
}
def _flatten_layers(lst):
for paint in lst:
if paint["Format"] == ot.PaintFormat.PaintColrLayers:
yield from _flatten_layers(paint["Layers"])
else:
yield paint
class LayerListUnbuilder:
def __init__(self, layers):
self.layers = layers
callbacks = {
(
ot.Paint,
ot.PaintFormat.PaintColrLayers,
): self._unbuildPaintColrLayers,
}
self.tableUnbuilder = TableUnbuilder(callbacks)
def unbuildPaint(self, paint):
assert isinstance(paint, ot.Paint)
return self.tableUnbuilder.unbuild(paint)
def _unbuildPaintColrLayers(self, source):
assert source["Format"] == ot.PaintFormat.PaintColrLayers
layers = list(
_flatten_layers(
[
self.unbuildPaint(childPaint)
for childPaint in self.layers[
source["FirstLayerIndex"] : source["FirstLayerIndex"]
+ source["NumLayers"]
]
]
)
)
if len(layers) == 1:
return layers[0]
return {"Format": source["Format"], "Layers": layers}
if __name__ == "__main__":
from pprint import pprint
import sys
from fontTools.ttLib import TTFont
try:
fontfile = sys.argv[1]
except IndexError:
sys.exit("usage: fonttools colorLib.unbuilder FONTFILE")
font = TTFont(fontfile)
colr = font["COLR"]
if colr.version < 1:
sys.exit(f"error: No COLR table version=1 found in {fontfile}")
colorGlyphs = unbuildColrV1(
colr.table.LayerList,
colr.table.BaseGlyphList,
)
pprint(colorGlyphs)
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