[cairo] Disabling antialiased shape drawing

Robert O'Callahan rocallahan at novell.com
Sun Aug 7 21:14:10 PDT 2005

On Sun, 2005-08-07 at 16:08 -0700, Bill Spitzak wrote:
> It certainly seems to me that a single API will work for this.
> It looks like people want exactly three things:
> 1. Antialiasing of some form. This is the default state of Cairo.
> 2. Supersampling for antialiasing is ok, but partial pixel coverage is 
> not. The result will look like #1 or #3 depending on the driver.
> 3. Need to emulate old graphics. No supersampling or antialiasing is wanted.
> Looks like 3 constants to me.

I don't think so. Supersampling is something you want on at most a
per-surface basis. But I want to be able to control antialiasing
per-drawing-operation; applications knowing that certain drawing
operations will not form seams can use coverage antialiasing for those
operations. For example, text glyphs will almost always fall into this
category. Rounded border corners can also fall into this category.


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