[cairo] Clipping and on-demand redraw

[Enrico Weigelt, metux IT consult]

On 09.01.2016 23:37, Lawrence D'Oliveiro wrote:
> On Sat, 9 Jan 2016 23:11:44 +0100, Enrico Weigelt, metux IT consult
> wrote:
> 
>> But I dont know yet, how to do that also w/ rotation.
> 
> You can convert the bounding rectangle of the widget to a clip path, and
> do path intersection/subtraction etc.
> 
> Or you could simplify it, and compute a bigger axis-aligned bounding
> rectangle for a rotated widget. Then you only need to do operations
> on axis-aligned rectangles.

hmm, could you perhaps give me some example ?


--mtx

--
Enrico Weigelt,
metux IT consulting
+49-151-27565287