Viewer zoom on large images

Help & Support
1

Hi,

I'm having an issue zooming large png/jpgs with the built in viewer,
basically zooming images above a few megabytes in size has abnormal behavior.

3 examples,

A 20mb png can zoom to 400%, but going to 800% causes the image to return to 100% zoom (while the status bar reads 800%)

A 80mb png zoomed to 150% and the entire image turns black, zooming to 200% the image is still black, zoom to 400% and the image returns at 100% zoom (with status bar reading 400%)

A 292mb png can zoom to 150%, but subsequent zoom levels all show the image at 100%

Have uploaded an 87mb png here in-case you don't have one handy

https://dl.dropboxusercontent.com/s/b7u7qfgkmg9egnr/M167966396RE.png?dl=0(image larger than 5120KB)

All these files zoom in GIMP and the Windows photo viewer (system has atleast 20gig of ram free, so thats not the issue either)

Cheers,
Rob

2

Those are all limitations of the Windows API we currently use for scaling/displaying images in the viewer.

(It's not the file size, it's the total image dimensions, possibly depending on GPU hardware as well, although I'm not sure if that makes a difference these days.)

We'll remove those limits in the future when we switch to a GPU accelerated API, which is one of our longer-term goals.

1 Like
3

Ahh,

Makes sense now

Thanks for the explanation!