[Libpgf-devel] Progressive transmission

[Thomas S. <th...@so...>]

I notice that PGFImage::Read allows progressive loading in terms of 
levels. I'd like to know whether it would be possible, with the PGF 
format, to support spatially progressive loading as well. As I 
understand it, with JPEG 2000, it is merely a difference of reordering 
the encoded data.

For instance, I might have an image with dimensions 4096x5120, but 
initially I'd like to just load a small rectangular region of the image, 
say the rectangular region {(0,0),  (800, 600)}. In terms of API, I 
could imagine something like this:

class PGFImage {
public:
 void Read(int level = 0, const Region &region, CallbackPtr cb = NULL) 
THROW_;
};


Would that be possible?

Thomas