1.9.8: A paletted 4-bit PNG image is displayed incorrectly when zoomed in
Posted: Mon Dec 15, 2025 4:29 pm
XnView: MP 1.9.8 - 64 bit
OS: Windows 10 - 64bit
When a paletted 4-bit PNG is zoomed in, it turns into a series of stripes. Apparently, one column stretches across the entire width of the image. ImageMagick command to create such images:
Effect: A paletted 4-bit PNG display incorrectly when zoomed in.
To reproduce:
1. Open attached gradient_dither.png in XnView MP.
2. Zoom in more than 100%.
Actual behaviour (bug): The image turns into a series of stripes
Expected behaviour: The image is displayed correctly.
OS: Windows 10 - 64bit
When a paletted 4-bit PNG is zoomed in, it turns into a series of stripes. Apparently, one column stretches across the entire width of the image. ImageMagick command to create such images:
Code: Select all
magick.exe input.png -remap eink_cmap.gif output.pngTo reproduce:
1. Open attached gradient_dither.png in XnView MP.
2. Zoom in more than 100%.
Actual behaviour (bug): The image turns into a series of stripes
Expected behaviour: The image is displayed correctly.