[AGG] (no subject)

[Ivan N. <in...@pd...>]

It seems that there is a problem with bi-linear image filter(s) due to
processing of image edges as a source of alpha. This can be illustrated when
a 1 pixel image is rendered at higher zoom ratio. I would expect that the
whole zoom rectangle is solid black block, however the zoomed image shows
distorted geometry and gradient (see the attached image). The explains the
non-zero alpha problem I reported previously, and may be contributing to
background stripes appearing between images that are drawn next to each
other.

Another problem with bi-linear filter is that high-resolution images loose
quality when the image is 'zoomed out' (e.g. when creating a thumbnail). All
of this is calling for another custom filter, but I wonder if these issues
are perceived as a problem with other AGG users.

Ivan Nincic