Creates a free-form triangle mesh shading (Type 4) from a builder's triangles.
public PdfTriangleMeshShading CreateMeshShading(PdfFreeFormMeshBuilder mesh, PdfShadingOptions? options)
The mesh: at least one triangle; its colour space and function belong to this document.
The optional entries (not ExtendStart or ExtendEnd); null for none.
ISO 32000-2 §8.7.4.5.5, Table 81 (PDF 1.3). See PdfMeshBuilder for the data layout. Records PDF 1.3. A mutation.