Define the first point of the current patch in a mesh pattern.
After this call the current point will be (x, y).
Note: If pattern is not a mesh pattern then pattern will be put
into an error status with a status of
CAIRO_STATUS_PATTERN_TYPE_MISMATCH. If pattern has no current
patch or the current patch already has at least one side, pattern
will be put into an error status with a status of
CAIRO_STATUS_INVALID_MESH_CONSTRUCTION.
Since 1.12
Define the first point of the current patch in a mesh pattern. After this call the current point will be (x, y). Note: If pattern is not a mesh pattern then pattern will be put into an error status with a status of CAIRO_STATUS_PATTERN_TYPE_MISMATCH. If pattern has no current patch or the current patch already has at least one side, pattern will be put into an error status with a status of CAIRO_STATUS_INVALID_MESH_CONSTRUCTION. Since 1.12