Copying part of image is buggy

[dexter86]

XnViewMP 1.6.3 and Windows 10

Steps to reproduce:
1. Open any image in viewer mode and select part of it, like this:

Zrzut ekranu 2023-12-26 112932.png (346.96 KiB) Viewed 3228 times

2. Press Ctrl+C or "Edit -> Copy"
3. Open Windows Paint and press Ctrl+V or click Paste, notice that it pasted correctly only that selected fragment.
4. Open https://evercoder.github.io/clipboard-inspector/ and try pasting it there. Notice that it pasted the whole image instead.

The same broken result can be achieved in Discord app when you try to paste it in conversation window, it pastes whole image instead of that fragment.

Zrzut ekranu 2023-12-26 113658.png (67.37 KiB) Viewed 3228 times

Using Clipview from http://www.peterbuettner.de/develop/tools/clipview/ you can see that XnViewMP copies some weird data do clipboard. For example, here's some image fragment copied to clipboard from IrfanView

And here's from XnViewMP

[dexter86]

Found a better software to see clipboard data:
https://www.nirsoft.net/utils/inside_clipboard.html
You can clearly see that there are multiple copy of that image in different formats

[XnTriq]

The same broken result can be achieved in Discord app when you try to paste it in conversation window, it pastes whole image instead of that fragment.

Confirmed for XnView MP v1.6.3 on Windows 10 Pro 22H2 (64-bit) and these web browsers:

• Brave v1.61.109
• Thorium v117.0.5938.157 portable

Related reports:

• Missing features (compared to XnView Classic)
• Pasting a selection into other programs works differently in XnView MP
• Copy and paste selection issues in image view, clipboard is to blame?
• Keep ratio on paste
• 0.94.2 Clipboard glitch (Essential) still there
• Paste Outside enhancement
• Pasting images into image search engines (Classic)
• How to copy the picture to powerpoint?

Freeware for analyzing clipboard content:

• Peter Johnson: Clipboard Format Spy
• Nir Sofer: InsideClipboard
• Jim Barry: Clipboard Spy (Softpedia)
• Karen Kenworthy †: Clipboard Viewer
• Comfort Software: Free Clipboard Viewer

[dexter86]

They are right. If I close XnViewMP after copying fragment, then only this is left in clipboard

[XnTriq]

Edit → Copy to clipboard → Image content (Ctrl+Shift+C) does the trick!

• What does "Image Data" (Ctrl + shift+c) is supposed to do ?
• 0.84: Copy Image does not work!
• How to copy png to clipboard properly
• How to copy paste into an email message?
• I cannot copy png file

[user0]

Edit → Copy to clipboard → Image content (Ctrl+Shift+C) does the trick!

the problem is - 'Image content' shall be copied via CTRL+C command (see other apps)
SHIFT+CTRL+C shall be the advanced one with whatever additional stuff

so far only Nomacs has similar strange behavior

also, not sure why CF_DIB/CF_DIBV5 have more data once xnviewmp is closed..

test_img_clipboard.zip

(100.64 KiB) Downloaded 120 times

[dexter86]

Ctrl+C should behave in the same manner as IrfanView, that is it should only copy selected fragment and that's it. Every other software behave that way, it's only XnViewMP that does it in this weird way.

[XnTriq]

the problem is - 'Image content' shall be copied via CTRL+C command (see other apps)
SHIFT+CTRL+C shall be the advanced one with whatever additional stuff

I'd also prefer standard behavior.

[Piotr Osada]

Steps to reproduce:
1. Open any image in viewer mode and select part of it, like this:
2. Press Ctrl+C or "Edit -> Copy"
3. Open Windows Paint and press Ctrl+V or click Paste, notice that it pasted correctly only that selected fragment.
4. Open https://evercoder.github.io/clipboard-inspector/ and try pasting it there. Notice that it pasted the whole image instead.

Related issue:
viewtopic.php?t=49064