Pipeline color blend state (used by [RenderingDevice]).
This object is used by [RenderingDevice].
- The attachments that are blended together.
- The constant color to blend with. See also [method RenderingDevice.draw_list_set_blend_constants].
- If [code]true[/code], performs the logic operation defined in [member logic_op].
- The logic operation to perform for blending. Only effective if [member enable_logic_op] is [code]true[/code].