Re: [Openexr-devel] scanline order

[Florian Kainz]

Brian Willoughby wrote:
> 
> [  > With ZIP and PIZ compression, pixels are stored in blocks of 16 or 32
> [  > scanlines, respectively.  With RLE and ZIPS compression, pixels are 
> stored
> [  > in single-scanline blocks.
> [
> [  Anyway to alter this value in the writer to write in smaller chunks trading
> [  off compression for accessability?  32 scanlines seems like a rather huge
> [  chunk, especially for any "normal" size image?
> 
> Why not write an intermediate object (or subclass) which caches entire blocks?
>  The new object could query the block size and uncompress an entire block
> before returning an individual scan line. 

The IlmImf library already does this.