[cairo] Image Format / Pre-Multiplied Alpha Related Feature Request

[Lawrence D'Oliveiro]

On Fri, 29 Jan 2016 12:12:29 +1300, I wrote:

> Try oversampling.

I realized, this may work to some extent for gradients and other such
areas of varying pixel values, but it won’t properly handle areas of
constant colour. Averaging 4 or 16 pixels of the same truncated value is
not going to recover the original, more accurate value.

Still, it might be of use with photorealistic-type imagery...