1.8.8 - viewer - png - alpha transparency - clipboard issues
Posted: Sat May 10, 2025 4:14 pm
XnViewMP 1.8.8 64bit
Windows11 (24H2), display resolution 3840x2160, dpi scale 150%
Viewer - png - alpha transparency
few issues with copy/pasting from clipboard
To reproduce:
0. prerequisites
- have 2 test images (32bit png)
issue A
1. open 1.png in Viewer
2. press Ctrl+C, Ctrl+V
image will be pasted, but with halo on borders/partially transparent parts (similar issue)
expected behavior
eg like in mspaint/photoshop
issue B
1. open 1.png in Viewer(instance A) and 2.png in another Viewer(instance B)
2. copy 2.png to clipboard (via Ctrl+C or Ctrl+Shift+C) and insert into 1.png (Ctrl+V)
image will be pasted with artifacts (issue A)
3. press Ctrl+Z to undo pasting
4. close instance B
5. paste 2.png from clipboard into 1.png again
result will be different (it looks like 2.png lost alpha channel on app close)
Related
Windows11 (24H2), display resolution 3840x2160, dpi scale 150%
Viewer - png - alpha transparency
few issues with copy/pasting from clipboard
To reproduce:
0. prerequisites
- have 2 test images (32bit png)
issue A
1. open 1.png in Viewer
2. press Ctrl+C, Ctrl+V
image will be pasted, but with halo on borders/partially transparent parts (similar issue)
- a.png (4.09 KiB) Viewed 209 times
eg like in mspaint/photoshop
issue B
1. open 1.png in Viewer(instance A) and 2.png in another Viewer(instance B)
2. copy 2.png to clipboard (via Ctrl+C or Ctrl+Shift+C) and insert into 1.png (Ctrl+V)
image will be pasted with artifacts (issue A)
3. press Ctrl+Z to undo pasting
4. close instance B
5. paste 2.png from clipboard into 1.png again
result will be different (it looks like 2.png lost alpha channel on app close)
- b.png (3.88 KiB) Viewed 206 times
Related
- issues
1.8.2 - view - png - tRNS transparency - viewing issues
- todo -
1.8.8 - viewer - png - alpha transparency - clipboard issues (current post)
1.7.1 - viewer - high zoom quality - border at the edge of transparent png
- fixed -
1.8.0 - viewer - change color depth - 32bit result when converting 8 to 24 (1.8.1)
1.6.5 - view - transparent index visible when zooming (1.8.1)
1.7.2 - viewer - Show alpha became disabled (1.8.0)
1.4.0 - viewer / batch convert - Change color depth to 8bit + Filter = mess (feature)