1.7.2 - viewer - Show alpha became disabled

[user0]

XnViewMP 1.7.2 64bit
Windows11 (23H2), display resolution 3840x2160, win scaling 150%

Viewer - alpha channel
Show alpha channel button became disabled after pressing any of Show RGB buttons

To reproduce:
0. add buttons to the toolbar: Show red, Show green, Show blue, Show alpha
1. open test image in Viewer

test_img_32bit.png (1.36 KiB) Viewed 1410 times

2. press any button other than "Show Alpha", eg "Show Blue"

channel_blue_on_aplha_button_off.png (1.89 KiB) Viewed 1410 times

"Show alpha" button became disabled

ps: no such issue in Preview pane (Browser)




Related

• issues
  - done -
  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) current post
  1.4.0 - viewer / batch convert - Change color depth to 8bit + Filter = mess (feature)

[xnview]

Thanks to your detailed description I can reproduce the problem.

[xnview]

This problem is supposed to be fixed in XnView MP 1.8.0. Please check and confirm the bug fix here.

[user0]

fixed in 180