double rendering of borders ...

Michael Meeks michael.meeks at suse.com
Wed Aug 1 13:25:11 PDT 2012


Hi Ivan,

On Wed, 2012-08-01 at 22:18 +0400, Ivan Timofeev wrote:
> On 01.08.2012 20:59, Michael Meeks wrote:
> Well, now I have read about alpha compositing and cairo... :)

	Oh ! nice :-)

> We use CAIRO_FORMAT_ARGB32 and the cairo manual says[1]:
> 
>   Pre-multiplied alpha is used. (That is, 50% transparent red is 
> 0x80800000, not 0x80ff0000.)

	So you're right, and I'm wrong then :-) good.

> so cairo_data elements already multiplied by alpha.

	Lets get your patch to fix this in the - hopefully that makes
everything prettier.

	Thanks !

		Michael.

-- 
michael.meeks at suse.com  <><, Pseudo Engineer, itinerant idiot



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