[cairo] null stream pdf surface

[Kozhevnikov Mikhail]

Hi Behdad,

Thank for your suggestion! I think that should work great for vector surfaces, but scaling down a png would not look nice (I've tried it out -- see the results attached). The scale factor of 5 I use in the example is not quite realistic, of course, but the conclusion is that apparently we cannot avoid the loss of quality in general case. I think I'll settle with re-rendering until the real meta-surface arrives.

Cheers, 
Mikhail.

24.08.2010, 21:00, "Behdad Esfahbod" <behdad at behdad.org>:
> On 08/23/10 20:20, Kozhevnikov Mikhail wrote:
>
>>  Hi,
>>
>>  I'm trying to draw a graph with textual labels so as to fit exactly the size of the image requested by the user -- that is, the content should touch the border in at least one dimension. I thought of rendering the stuff into a metasurface, and then, knowing the size of the result, transform it and embed into the target image, which is a png, usually. However, when doing so I notice the text looks a bit worse (see example attached). Is it supposed to go like this?
>>  I can just re-render the content into he target surface directly, but that would require some more changes to the code in order to be efficient.
>
> I suggest that you always create a temp surface of the same type as your final
> target. Font settings defaults differ from surface type to surface type...
> You can create a 0x0 temp surface. Works just as well.
>
> Cheers,
> behdad
>
>>  Cheers,
>>  Mikhail.