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[visitor_test] Implement glyf table visiting

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This commit is contained in:
Behdad Esfahbod 2022-08-15 12:47:17 -06:00
parent a0686e8d2e
commit be7df107e2
2 changed files with 22 additions and 3 deletions
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6
Lib/fontTools/misc/visitor.py
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@ -105,10 +105,10 @@ class TTVisitor(Visitor):
@TTVisitor.register(TTFont) @TTVisitor.register(TTFont)
def visit(visitor, font): def visit(visitor, font):
if hasattr(font, "visited"): if hasattr(visitor, "font"):
return False return False
font.visited = True visitor.font = font
for tag in font.keys(): for tag in font.keys():
visitor.visit(font[tag]) visitor.visit(font[tag])
del font.visited del visitor.font
return False return False

19
Tests/misc/visitor_test.py
View File

@ -61,6 +61,25 @@ def visit(visitor, obj, attr, metrics):
metrics[g] = visitor.scale(advance), visitor.scale(lsb) metrics[g] = visitor.scale(advance), visitor.scale(lsb)
@ScalerVisitor.register_attr(ttLib.getTableClass("glyf"), "glyphs")
def visit(visitor, obj, attr, glyphs):
for g in glyphs.values():
if g.isComposite():
for component in g.components:
component.x = visitor.scale(component.x)
component.y = visitor.scale(component.y)
else:
for attr in ("xMin", "xMax", "yMin", "yMax"):
v = getattr(g, attr, None)
if v is not None:
setattr(g, attr, visitor.scale(v))
glyf = visitor.font["glyf"]
coordinates = g.getCoordinates(glyf)[0]
for i, (x, y) in enumerate(coordinates):
coordinates[i] = visitor.scale(x), visitor.scale(y)
# GPOS # GPOS