Re: [Openexr-devel] Sample image t14.exr has wrong display window?

[Brendan Bolles]

On Jun 27, 2014, at 9:04 AM, Gonzalo Garramuno wrote:

>                x    y      x2    y2   w h              x y    x2 y2   w    h
> displayWindow=(-100,-100 - -100,-100) [0-0] dataWindow=(0,0 - 399,299) 
> [399-299]
> 
> and thus no pixel or image at all.
> 
> Also t01.exr says it should have the same display window as the data window.  
> However, the display window for that image is:
> 
> displayWindow=(0,0 - 0,0) [0-0] dataWindow=(0,0 - 399,299) [399-299]


The dataWindow and displayWindow coordinates are inclusive, so to get the 
width/height you need to add a +1 to your measurements.

t14.exr actually has a displayWindow of [-100, -100, 0, 0], so that's 101x101 
pixels.  The dataWindow is 400x300 [0, 0, 399, 299], as are all the files in 
that folder.  What the README says is that the two "have only one pixel in 
common."  So you should have a 101x101 image with just one yellow pixel down in 
the lower right corner.  The exrdisplay program will show you how it's done.


In every t01.exr I've ever seen, the displayWindow matches that dataWindow.  I 
just checked the one on the GitHub repository to verify.


Brendan