from fontTools.misc.transform import ( Transform, Identity, Offset, Scale, DecomposedTransform, ) import math import pytest class TransformTest(object): def test_examples(self): t = Transform() assert repr(t) == "" assert t.scale(2) == Transform(2, 0, 0, 2, 0, 0) assert t.scale(2.5, 5.5) == Transform(2.5, 0, 0, 5.5, 0, 0) assert t.scale(2, 3).transformPoint((100, 100)) == (200, 300) def test__init__(self): assert Transform(12) == Transform(12, 0, 0, 1, 0, 0) assert Transform(dx=12) == Transform(1, 0, 0, 1, 12, 0) assert Transform(yx=12) == Transform(1, 0, 12, 1, 0, 0) def test_transformPoints(self): t = Transform(2, 0, 0, 3, 0, 0) assert t.transformPoints([(0, 0), (0, 100), (100, 100), (100, 0)]) == [ (0, 0), (0, 300), (200, 300), (200, 0), ] def test_transformVector(self): t = Transform(2, 0, 0, 3, -10, 30) assert t.transformVector((-4, 5)) == (-8, 15) def test_transformVectors(self): t = Transform(2, 0, 0, 3, -10, 30) assert t.transformVectors([(-4, 5), (-6, 7)]) == [(-8, 15), (-12, 21)] def test_translate(self): t = Transform() assert t.translate(20, 30) == Transform(1, 0, 0, 1, 20, 30) def test_scale(self): t = Transform() assert t.scale(5) == Transform(5, 0, 0, 5, 0, 0) assert t.scale(5, 6) == Transform(5, 0, 0, 6, 0, 0) def test_rotate(self): t = Transform() assert t.rotate(math.pi / 2) == Transform(0, 1, -1, 0, 0, 0) t = Transform() assert t.rotate(-math.pi / 2) == Transform(0, -1, 1, 0, 0, 0) t = Transform() assert tuple(t.rotate(math.radians(30))) == pytest.approx( tuple(Transform(0.866025, 0.5, -0.5, 0.866025, 0, 0)) ) def test_skew(self): t = Transform().skew(math.pi / 4) assert tuple(t) == pytest.approx(tuple(Transform(1, 0, 1, 1, 0, 0))) def test_transform(self): t = Transform(2, 0, 0, 3, 1, 6) assert t.transform((4, 3, 2, 1, 5, 6)) == Transform(8, 9, 4, 3, 11, 24) def test_reverseTransform(self): t = Transform(2, 0, 0, 3, 1, 6) reverse_t = t.reverseTransform((4, 3, 2, 1, 5, 6)) assert reverse_t == Transform(8, 6, 6, 3, 21, 15) t = Transform(4, 3, 2, 1, 5, 6) reverse_t = t.transform((2, 0, 0, 3, 1, 6)) assert reverse_t == Transform(8, 6, 6, 3, 21, 15) def test_inverse(self): t = Transform().translate(2, 3).scale(4, 5) assert t.transformPoint((10, 20)) == (42, 103) it = t.inverse() assert it.transformPoint((42, 103)) == (10.0, 20.0) assert Transform().inverse() == Transform() def test_toPS(self): t = Transform().scale(2, 3).translate(4, 5) assert t.toPS() == "[2 0 0 3 8 15]" def test__ne__(self): assert Transform() != Transform(2, 0, 0, 2, 0, 0) def test__hash__(self): t = Transform(12, 0, 0, 13, 0, 0) d = {t: None} assert t in d.keys() def test__bool__(self): assert not bool(Transform()) assert Transform(2, 0, 0, 2, 0, 0) assert Transform(1, 0, 0, 1, 1, 0) def test__repr__(self): assert repr(Transform(1, 2, 3, 4, 5, 6)) == "" def test_Identity(self): assert isinstance(Identity, Transform) assert Identity == Transform(1, 0, 0, 1, 0, 0) def test_Offset(self): assert Offset() == Transform(1, 0, 0, 1, 0, 0) assert Offset(1) == Transform(1, 0, 0, 1, 1, 0) assert Offset(1, 2) == Transform(1, 0, 0, 1, 1, 2) def test_Scale(self): assert Scale(1) == Transform(1, 0, 0, 1, 0, 0) assert Scale(2) == Transform(2, 0, 0, 2, 0, 0) assert Scale(1, 2) == Transform(1, 0, 0, 2, 0, 0) def test_decompose(self): t = Transform(2, 0, 0, 3, 5, 7) d = t.toDecomposed() assert d.scaleX == 2 assert d.scaleY == 3 assert d.translateX == 5 assert d.translateY == 7 def test_decompose(self): t = Transform(-1, 0, 0, 1, 0, 0) d = t.toDecomposed() assert d.scaleX == -1 assert d.scaleY == 1 assert d.rotation == 0 t = Transform(1, 0, 0, -1, 0, 0) d = t.toDecomposed() assert d.scaleX == 1 assert d.scaleY == -1 assert d.rotation == 0 class DecomposedTransformTest(object): def test_identity(self): t = DecomposedTransform() assert ( repr(t) == "DecomposedTransform(translateX=0, translateY=0, rotation=0, scaleX=1, scaleY=1, skewX=0, skewY=0, tCenterX=0, tCenterY=0)" ) assert t == DecomposedTransform(scaleX=1.0) def test_scale(self): t = DecomposedTransform(scaleX=2, scaleY=3) assert t.scaleX == 2 assert t.scaleY == 3 def test_toTransform(self): t = DecomposedTransform(scaleX=2, scaleY=3) assert t.toTransform() == (2, 0, 0, 3, 0, 0) @pytest.mark.parametrize( "decomposed", [ DecomposedTransform(scaleX=1, scaleY=0), DecomposedTransform(scaleX=0, scaleY=1), DecomposedTransform(scaleX=1, scaleY=0, rotation=30), DecomposedTransform(scaleX=0, scaleY=1, rotation=30), DecomposedTransform(scaleX=1, scaleY=1), DecomposedTransform(scaleX=-1, scaleY=1), DecomposedTransform(scaleX=1, scaleY=-1), DecomposedTransform(scaleX=-1, scaleY=-1), DecomposedTransform(rotation=90), DecomposedTransform(rotation=-90), DecomposedTransform(skewX=45), DecomposedTransform(skewY=45), DecomposedTransform(scaleX=-1, skewX=45), DecomposedTransform(scaleX=-1, skewY=45), DecomposedTransform(scaleY=-1, skewX=45), DecomposedTransform(scaleY=-1, skewY=45), DecomposedTransform(scaleX=-1, skewX=45, rotation=30), DecomposedTransform(scaleX=-1, skewY=45, rotation=30), DecomposedTransform(scaleY=-1, skewX=45, rotation=30), DecomposedTransform(scaleY=-1, skewY=45, rotation=30), DecomposedTransform(scaleX=-1, skewX=45, rotation=-30), DecomposedTransform(scaleX=-1, skewY=45, rotation=-30), DecomposedTransform(scaleY=-1, skewX=45, rotation=-30), DecomposedTransform(scaleY=-1, skewY=45, rotation=-30), DecomposedTransform(scaleX=-2, skewX=45, rotation=30), DecomposedTransform(scaleX=-2, skewY=45, rotation=30), DecomposedTransform(scaleY=-2, skewX=45, rotation=30), DecomposedTransform(scaleY=-2, skewY=45, rotation=30), DecomposedTransform(scaleX=-2, skewX=45, rotation=-30), DecomposedTransform(scaleX=-2, skewY=45, rotation=-30), DecomposedTransform(scaleY=-2, skewX=45, rotation=-30), DecomposedTransform(scaleY=-2, skewY=45, rotation=-30), ], ) def test_roundtrip(lst, decomposed): assert decomposed.toTransform().toDecomposed().toTransform() == pytest.approx( tuple(decomposed.toTransform()) ), decomposed