Add Chromium-only Blender WebEngine parity work

blender-5.2.0/scripts/freestyle/styles/anisotropic_diffusion.py

@@ -0,0 +1,41 @@
+# SPDX-FileCopyrightText: 2008-2023 Blender Authors
+#
+# SPDX-License-Identifier: GPL-2.0-or-later
+
+#  Author   : Fredo Durand
+#  Date     : 12/08/2004
+#  Purpose  : Smooth lines using an anisotropic diffusion scheme
+
+from freestyle.chainingiterators import ChainPredicateIterator
+from freestyle.predicates import (
+    AndUP1D,
+    ExternalContourUP1D,
+    NotUP1D,
+    QuantitativeInvisibilityUP1D,
+    TrueBP1D,
+    TrueUP1D,
+)
+from freestyle.shaders import (
+    ConstantThicknessShader,
+    IncreasingColorShader,
+    SamplingShader,
+    pyDiffusion2Shader,
+)
+from freestyle.types import Operators, Stroke
+
+
+# pyDiffusion2Shader parameters
+offset = 0.25
+nbIter = 30
+
+upred = AndUP1D(QuantitativeInvisibilityUP1D(0), ExternalContourUP1D())
+Operators.select(upred)
+bpred = TrueBP1D()
+Operators.bidirectional_chain(ChainPredicateIterator(upred, bpred), NotUP1D(upred))
+shaders_list = [
+    ConstantThicknessShader(4),
+    SamplingShader(2),
+    pyDiffusion2Shader(offset, nbIter),
+    IncreasingColorShader(1, 0, 0, 1, 0, 1, 0, 1),
+]
+Operators.create(TrueUP1D(), shaders_list)