[cairo] Fast text rendering

Oscar Lazzarino oscar.lazzarino at i-m3d.com
Tue Jul 13 09:11:23 PDT 2010

On 07/13/2010 06:09 PM, Michael Urman wrote:
> On Tue, Jul 13, 2010 at 04:49,<michael at cubic.org>  wrote:
>> It is only draw when nessesary, but the worst case makes it nessesary to
>> draw them with 30Hz.
>> This is the reason why the 30Hz:
>> http://www.grandma2.de/help/en-us/image/Ref_Window_Sheet_DMX.png
>> This can actually be drawn to an image and then be mapped to the destination.
>> And its geting even worse with lots of dynamic changes:
>> http://www.grandma2.de/help/en-us/image/Concept_Effect_2.gif
>> http://www.grandma2.de/help/en-us/image/Ref_Window_Sheet_Fixture.png
> It looks like these are almost all numbers or number pairs. Have you
> tried various caching ideas such as
>   - saving and reusing 10 digit or 100 digit-pair paths and just filling
>   - pre-rendering 10 digit or 100 digit-pair images and just compositing

I thought the font rasterizer already did some gliph caching. Is this 
not true?


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