Enumeration

CoglPipelineAlphaFunc

Declaration

enum Cogl.PipelineAlphaFunc

Description [src]

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 CoglPipelineAlphaFunc determines how the comparison is done.

Members

Name	Description
`COGL_PIPELINE_ALPHA_FUNC_NEVER`	Never let the fragment through.
`COGL_PIPELINE_ALPHA_FUNC_LESS`	Let the fragment through if the incoming alpha value is less than the reference alpha value.
`COGL_PIPELINE_ALPHA_FUNC_EQUAL`	Let the fragment through if the incoming alpha value equals the reference alpha value.
`COGL_PIPELINE_ALPHA_FUNC_LEQUAL`	Let the fragment through if the incoming alpha value is less than or equal to the reference alpha value.
`COGL_PIPELINE_ALPHA_FUNC_GREATER`	Let the fragment through if the incoming alpha value is greater than the reference alpha value.
`COGL_PIPELINE_ALPHA_FUNC_NOTEQUAL`	Let the fragment through if the incoming alpha value does not equal the reference alpha value.
`COGL_PIPELINE_ALPHA_FUNC_GEQUAL`	Let the fragment through if the incoming alpha value is greater than or equal to the reference alpha value.
`COGL_PIPELINE_ALPHA_FUNC_ALWAYS`	Always let the fragment through.