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

COGL_PIPELINE_ALPHA_FUNC_NEVER

Never let the fragment through.

  • Value: 512
  • Available since: 14
COGL_PIPELINE_ALPHA_FUNC_LESS

Let the fragment through if the incoming alpha value is less than the reference alpha value.

  • Value: 513
  • Available since: 14
COGL_PIPELINE_ALPHA_FUNC_EQUAL

Let the fragment through if the incoming alpha value equals the reference alpha value.

  • Value: 514
  • Available since: 14
COGL_PIPELINE_ALPHA_FUNC_LEQUAL

Let the fragment through if the incoming alpha value is less than or equal to the reference alpha value.

  • Value: 515
  • Available since: 14
COGL_PIPELINE_ALPHA_FUNC_GREATER

Let the fragment through if the incoming alpha value is greater than the reference alpha value.

  • Value: 516
  • Available since: 14
COGL_PIPELINE_ALPHA_FUNC_NOTEQUAL

Let the fragment through if the incoming alpha value does not equal the reference alpha value.

  • Value: 517
  • Available since: 14
COGL_PIPELINE_ALPHA_FUNC_GEQUAL

Let the fragment through if the incoming alpha value is greater than or equal to the reference alpha value.

  • Value: 518
  • Available since: 14
COGL_PIPELINE_ALPHA_FUNC_ALWAYS

Always let the fragment through.

  • Value: 519
  • Available since: 14