emersion
Add min-icon-size option to enforce minimum icon dimensions
This PR adds support for a new configuration option and command-line flag: min-icon-size. This setting ensures that icons in notifications are not rendered too small, especially in cases where the icon file (e.g. .svg or low-res .png) is smaller than desired.
Previously, icons were rendered at their native size. This often led to extremely small icons in notifications (e.g. 16x16px icons on high-DPI screens), making them barely visible. Now, Mako will check the dimensions of the loaded icon and, if the largest side is smaller than min-icon-size, it will reload the image using gdk_pixbuf_new_from_file_at_scale() to upscale it to the minimum size while maintaining aspect ratio.
Was:
Became:
Changes:
-
New min-icon-size configuration key Example: min-icon-size = 32
-
New command-line override: --min-icon-size=N
-
Scaling logic: After loading the icon image (via gdk_pixbuf_new_from_file()), check if its width or height is less than min-icon-size. If so, reload the image using gdk_pixbuf_new_from_file_at_scale() with the minimum dimension. Aspect ratio is preserved.
Benefits:
- Improves visibility and aesthetics of notifications using small icons.
- Particularly useful for .svg icons or legacy bitmap icons at low resolutions.
- Works seamlessly with both old icon-path logic and new icon-theme lookup #584 (if present).
Compatibility:
- The new min-icon-size option is optional.
- If unset, Mako retains its original icon rendering behavior.
- Fully backward compatible with existing configurations.
Testing:
- Verified behavior with small PNG icons (16x16) and scalable SVG icons.
- Confirmed that large icons are unaffected.
- Checked integration with both icon lookup paths (libsfdo and legacy glob).
Closes #464 CC: @arebaka
Also useful for a color picker script. I have one that selects a 1x1 pixel on the screen and sends a notification showing the hex color code with the actual color as an icon.
This is how it shows on dunst:
and mako:
