[PATCH 4/4] EXA/evergreen/ni: accelerate PictOpOver with component alpha

[Dave Airlie]

On Mon, Jul 22, 2013 at 2:06 PM, Grigori Goronzy <greg at chown.ath.cx> wrote:
> Subpixel text rendering is typically done with a solid src and a
> pixmap mask. Traditionally, this cannot be accelerated in a single
> pass and requires two passes [1]. However, we can cheat a little
> with a constant blend color.

The hw should be able to do things in one pass with dual source blending afaik.

There is code in the mesa driver to setup dual src blends.

Dave.