Re: [AGG] Is it possible to perform this type of rendering?

[Vinnie <th...@ya...>]

> From: Lorne Laliberte <lo...@in...>
> You could also just render into a 32-bit buffer (RGBA,
> BGRA, or whatever suits your needs) and then blend that buffer onto
> your final output surface.

Thats exactly what I am trying to accomplish.

> I should clarify: in practical terms, the anti-aliasing
> coverage information is preserved if you output onto a 32-bit
> surface with a transparent background, i.e. a buffer that has
> been cleared with a transparent color(0,0,0,0).

So you are saying that agg already supports the feature I need? Well that will save me time. Just to be clear, I am currently using:

typedef agg::pixfmt_bgr24 pfmt_type;
typedef agg::renderer_base<pfmt_type> rbase_type;
typedef agg::renderer_scanline_aa_solid<rbase_type> rsolid_type;

So all I would need to do is switch to:
typedef agg::pixfmt_bgra32 pfmt_type;

That would be pretty sweet! You just saved me a few days of frustration!

Whats with all the "premultiply" variations? And whats the difference between regular and "plain"?