imv unable to open huge images

[Ypnose]

Hi,

I tend to save full webpages using the native "Take a Screenshot" option in Firefox. However, imv-4.2.0 does not display the pictures correctly. When it's opened, the picture stays white and nothing is shown. I'm using imv in a Wayland only setup. Firefox displays the picture correctly. Same for sxiv in a virtual machine.

Here the picture details :

$ file Screenshot_2021-05-30\ lorem\ ipsum\ at\ DuckDuckGo.png
Screenshot_2021-05-30 lorem ipsum at DuckDuckGo.png: PNG image data, 1736 x 32767, 8-bit/color RGBA, non-interlaced

$ exiftool -all Screenshot_2021-05-30\ lorem\ ipsum\ at\ DuckDuckGo.png 
ExifTool Version Number         : 12.26
File Name                       : Screenshot_2021-05-30 lorem ipsum at DuckDuckGo.png
Directory                       : .
File Size                       : 4.6 MiB
File Modification Date/Time     : 2021:05:30 09:33:45+02:00
File Access Date/Time           : 2021:05:30 09:33:45+02:00
File Inode Change Date/Time     : 2021:05:30 09:33:45+02:00
File Permissions                : -rw-------
File Type                       : PNG
File Type Extension             : png
MIME Type                       : image/png
Image Width                     : 1736
Image Height                    : 32767
Bit Depth                       : 8
Color Type                      : RGB with Alpha
Compression                     : Deflate/Inflate
Filter                          : Adaptive
Interlace                       : Noninterlaced
Image Size                      : 1736x32767
Megapixels                      : 56.9

The example picture can be downloaded here (will be removed in one month).

[eXeC64]

Thanks for the report. This is a duplicate of #327, imv needs to start breaking up images into multiple OpenGL textures to handle very large images.

Closing as a duplicate.