Cogl.PipelineAlphaFunc
Alpha testing happens before blending primitives with the framebuffer and gives an opportunity to discard fragments based on a comparison with the incoming alpha value and a reference alpha value. The Cogl.PipelineAlphaFunc determines how the comparison is done.
- PipelineAlphaFunc.NEVER
Never let the fragment through.
- PipelineAlphaFunc.LESS
Let the fragment through if the incoming alpha value is less than the reference alpha value
- PipelineAlphaFunc.EQUAL
Let the fragment through if the incoming alpha value equals the reference alpha value
- PipelineAlphaFunc.LEQUAL
Let the fragment through if the incoming alpha value is less than or equal to the reference alpha value
- PipelineAlphaFunc.GREATER
Let the fragment through if the incoming alpha value is greater than the reference alpha value
- PipelineAlphaFunc.NOTEQUAL
Let the fragment through if the incoming alpha value does not equal the reference alpha value
- PipelineAlphaFunc.GEQUAL
Let the fragment through if the incoming alpha value is greater than or equal to the reference alpha value.
- PipelineAlphaFunc.ALWAYS
Always let the fragment through.