Re: [Openexr-devel] Writing tiles partially

[Larry Gritz]

Tiles (which are the data!) must be aligned to the data window origin, but the 
data window origin does not need to be (0,0).


On Jul 17, 2014, at 7:06 AM, Michel Lerenard <address@hidden> wrote:

> Hi,
> 
> I have a question regarding tiled files.
> It seems that the tiles need to be aligned on the origin (0,0) of the data 
> window to be readable.
> 
> Can anyone confirm this ?
> 
> Here's the story on how I came to ask this question:
> I want to export a file with a data window larger than the visible window. In 
> my application, tiles are aligned on the origin of the visible window:
> Exemple: If I write a 640 * 360 image with a 10% overscan on each side, my 
> visible window is {0,0,640,360}, and the data window is {-64,-36, 704, 396 }.
> Using  64x64 tiles, the image seems corrupt because the data window starts in 
> the middle of the first row of tiles.
> 

--
Larry Gritz
address@hidden