[cairo] 4x4 matrices in Cairo

Behdad Esfahbod behdad at behdad.org
Thu Nov 14 12:38:47 PST 2013

On 13-11-14 03:27 PM, Uli Schlachter wrote:
> On 13.11.2013 14:15, AD wrote:
>> Hey guys,
>> Is there a way to use 4x4 matrices in cairo?
> No.

It's about time to implement this perhaps...

> Cairo has to be able to invert the transformation that it uses and
> projective transformations aren't always invertible. AFAIK / AFAIR.
>> Or alternatively a may to decompose a 4x4 matrix into several 3x3 matrices?
> Nope. I guess you will have to implement this part yourself. You could generate
> the untransformed image with cairo and then apply the transformation "by hand".
>> I'm trying to distort an image as in pic attached.
> [...]
> Uli


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