Re: Creating a pixbuf from a Cairo image surface

[Jean Bréfort <jean brefort normalesup org>]

Le lundi 28 mai 2007 �6:39 +0300, Ari Jolma a �it :
> I'm intending to create an image surface in Cairo, draw on it, and, when 
> done, create a gdk pixbuf from the image surface. Eventually the pixbuf 
> is sent to the server side and converted into an image, or, in an 
> alternative scenario it is saved as an image on the client side.
> 
> The only problem (not really, just a drawback) I can see in this is the 
> fact that cairo formats and what gdk_pixbuf_new_from_data requires do 
> not match. AFAIK gdk requires data that is made of 24 bit RGB pixels and 
> cairo creates 32 bit ARGB or XRGB (X is unused 8 bits) pixels. So it 
> seems that I need to do a copy from one buffer to another in the last 
> step in the process.
> 
> Am I correct? Or is there something built-in that I could use for the 
> conversion.

We have conversion functions in goffice (goffice/utils/go-image.c).

Regards,
Jean