Created attachment 117832 [details]
CS:GO tga screenshot generated by Steam

SUMMARY
I'm trying to open this TGA image -- it's an uncompressed screenshot of the game Counter-Strike: GO, and it was generated by Steam --, but Gwenview is unable to.

STEPS TO REPRODUCE
1. Try to open the image i've attached with gwenview using the command line
2. Image won't load

OBSERVED RESULT
Terminal shows me this:

QImageReader::read() using format hint "tga" failed: "Unknown error"
A bad Qt image decoder moved the buffer to 18 in a call to canRead()! Rewinding.
Image format is actually "ico" not "tga"
QImageReader::read() using format hint "tga" failed: "Unknown error"
A bad Qt image decoder moved the buffer to 18 in a call to canRead()! Rewinding.
Image format is actually "ico" not "tga"

Renaming its extension to .ico, gives me this:

QImageReader::read() using format hint "ico" failed: "Unknown error"
A bad Qt image decoder moved the buffer to 22 in a call to canRead()! Rewinding.
Image format is actually "ico" not "ico"
QImageReader::read() using format hint "tga" failed: "Unknown error"
A bad Qt image decoder moved the buffer to 18 in a call to canRead()! Rewinding.
Image format is actually "ico" not "tga"


EXPECTED RESULT
Image loads without errors


SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Arch Linux 4.20.6
KDE Plasma Version: 5.14.5
KDE Frameworks Version: 5.54.0
Qt Version: 5.12.0

ADDITIONAL INFORMATION
I have tried some different targa images from the internet [1], but upon opening them I got the same errors

[1] http://netghost.narod.ru/gff/sample/images/tga/index.htm