:right-sidebar: True

TransformCategory
===================================================================

.. currentmodule:: gi.repository.Gsk





.. class:: TransformCategory
   :no-contents-entry:






The categories of matrices relevant for GSK and GTK.

Note that any category includes matrices of all later categories.
So if you want to for example check if a matrix is a 2D matrix,
`category >= GSK_TRANSFORM_CATEGORY_2D` is the way to do this.

Also keep in mind that rounding errors may cause matrices to not
conform to their categories. Otherwise, matrix operations done via
multiplication will not worsen categories. So for the matrix
multiplication `C = A * B`, `category(C) = MIN (category(A), category(B))`.













Fields
------

.. rst-class:: interim-class

.. class:: TransformCategory
   :no-index:
   

   .. attribute:: 2D

      The matrix is a 2D matrix. This is equivalent
      to :func:`~gi.repository.Graphene.Matrix.is_2d` returning :const:`True`. In particular, this
      means that Cairo can deal with the matrix.







   .. attribute:: 2D_AFFINE

      The matrix is a combination of 2D scale
      and 2D translation operations. In particular, this means that any
      rectangle can be transformed exactly using this matrix.







   .. attribute:: 2D_TRANSLATE

      The matrix is a 2D translation.







   .. attribute:: 3D

      The matrix is a 3D matrix. This means that
      the w column (the last column) has the values (0, 0, 0, 1).







   .. attribute:: ANY

      Analyzing the matrix concluded that it does
      not fit in any other category.







   .. attribute:: IDENTITY

      The matrix is the identity matrix.







   .. attribute:: UNKNOWN

      The category of the matrix has not been
      determined.