...to WLR_INFO to avoid logging issues with .desktop files as errors, for
example:
[sfdo-desktop] 1:1: Name is unset
[sfdo-desktop] Failed to load /usr/share/applications/lxqt-panel.desktop
[sfdo-desktop] 1:1: Exec is unset while DBusActivatable is unset or false
[sfdo-desktop] Failed to load /usr/share/applications/qemu.desktop
Also make libsfdo debug/info logging depend on environment variable
LABWC_DEBUG_LIBSFDO being set to avoid disproportionately verbose logging
by default for one particular sub-system.
Add an 'ENVIRONMENT VARIABLES' section to labwc(1) to describe the above
as well as other hitherto undocumented env vars with prefix LABWC_DEBUG_.
- fix that icons for normal/hovered/rounded buttons are not placed
exactly the same position
- fix blurry window button icons in scaled outputs
This commit introduces lab_img and scaled_img_buffer and uses them for
rendering icons in the window titlebar. Now the process of rendering
button icons are split into 2 phases: loading with lab_img_load() and
creating scene-nodes for them with scaled_img_buffer_create(). This
might incur some additional overhead since we no longer preload icon
textures, but the rendering of icon only happens for the first window
as backing buffers are shared and the overhead won't be noticeable.
This commit also simplifies the process of centering icon buffer in the
button, by creating icon buffers in a fixed geometry via
lab_img_render().
