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app/.venv/Lib/site-packages/weasyprint/matrix.py

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+"""Transformation matrix."""
+
+
+class Matrix(list):
+    def __init__(self, a=1, b=0, c=0, d=1, e=0, f=0, matrix=None):
+        if matrix is None:
+            matrix = [[a, b, 0], [c, d, 0], [e, f, 1]]
+        super().__init__(matrix)
+
+    def __matmul__(self, other):
+        assert len(self[0]) == len(other) == len(other[0]) == 3
+        return Matrix(matrix=[
+            [sum(self[i][k] * other[k][j] for k in range(3)) for j in range(3)]
+            for i in range(len(self))])
+
+    @property
+    def invert(self):
+        d = self.determinant
+        return Matrix(matrix=[
+            [
+                (self[1][1] * self[2][2] - self[1][2] * self[2][1]) / d,
+                (self[0][1] * self[2][2] - self[0][2] * self[2][1]) / -d,
+                (self[0][1] * self[1][2] - self[0][2] * self[1][1]) / d,
+            ],
+            [
+                (self[1][0] * self[2][2] - self[1][2] * self[2][0]) / -d,
+                (self[0][0] * self[2][2] - self[0][2] * self[2][0]) / d,
+                (self[0][0] * self[1][2] - self[0][2] * self[1][0]) / -d,
+            ],
+            [
+                (self[1][0] * self[2][1] - self[1][1] * self[2][0]) / d,
+                (self[0][0] * self[2][1] - self[0][1] * self[2][0]) / -d,
+                (self[0][0] * self[1][1] - self[0][1] * self[1][0]) / d,
+            ],
+        ])
+
+    @property
+    def determinant(self):
+        assert len(self) == len(self[0]) == 3
+        return (
+            self[0][0] * (self[1][1] * self[2][2] - self[1][2] * self[2][1]) -
+            self[1][0] * (self[0][1] * self[2][2] - self[0][2] * self[2][1]) +
+            self[2][0] * (self[0][1] * self[1][2] - self[0][2] * self[1][1]))
+
+    def transform_point(self, x, y):
+        return (Matrix(matrix=[[x, y, 1]]) @ self)[0][:2]
+
+    @property
+    def values(self):
+        (a, b), (c, d), (e, f) = [column[:2] for column in self]
+        return a, b, c, d, e, f