1.9.5: Grid doesn't scale with zoom

[Supergeek]

XnView: MP 1.9.5 64 bit
OS: Windows 10 Pro 64 bit

The Grid displays subdivisions for an image based on the zoomed virtual resolution instead of scaling to show how the grid would divide up the original image.

Effect: grid spacing is incorrect when viewing files at anything other than 100% scale.

Screenshot 2025-10-15 134938.png (1.98 KiB) Viewed 42 times

Zoomed in at 800% should show a 4x4 grid, not this.

Screenshot 2025-10-15 135015.png (9.13 KiB) Viewed 42 times

To reproduce:
1. Set a grid spacing of anything, say 16 for example.
2. Zoom in your image to 200%
3. The grid lines will appear as if you had a spacing of 8.
4. Zoom in to 400%
3. The grid lines will appear as if you had a spacing of 4.
And so on.

Actual behaviour (bug): grid spacing doesn't scale properly

Expected behaviour: grid spacing should scale with the zoom level.

[user0]

issue is that win dpi scale affects grid
eg same 20x20 image with same 10x10 grid:
1 - win dpi 100%
2 - win dpi 150%

grid_dpi_issue.png (1.02 KiB) Viewed 25 times