| Value | Meaning |
|---|---|
| rgbfalse | Only RGB channels will have the correct result. A(lpha) channel can contain any value. Suitable for blending into non-transparent targets (e.g. framebuffer, canvas) where the resulting alpha-channel (opacity) value does not matter. |
| rgbatrue | All RGBA channels will have the correct result. Suitable for blending into transparent targets (e.g. images) where the resulting alpha-channel (opacity) value matters. Use this mode for image manipulation. |
Alpha-blending accuracy level
This provides an optimization opportunity for use-cases that don’t require an alpha-channel on the result.