setBlendColor(red:green:blue:alpha:)
Configures each pixel component value, including alpha, for the render pipeline’s constant blend color.
Declaration
func setBlendColor(red: Float, green: Float, blue: Float, alpha: Float)Parameters
- red:
A value for the red component for the blend color constant.
- green:
A value for the green component for the blend color constant.
- blue:
A value for the blue component for the blend color constant.
- alpha:
A value for the alpha component for the blend color constant.
Discussion
The alpha and color values apply to all the render pass’s attachments. The red, green, and blue color parameters apply to the MTLBlendFactor.blendColor and MTLBlendFactor.oneMinusBlendColor blend factors.
The alpha parameter applies to the MTLBlendFactor.blendAlpha and MTLBlendFactor.oneMinusBlendAlpha blend factors.
The render pipeline’s default blend color value is 0.0 for each parameter, which is equivalent to MTLBlendFactor.zero. For other blending factor values, see MTLBlendFactor.