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Fix Wayland protocol error invalid stride on wl_shm with bgr888 format

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Align wl_shm buffer stride to both 4 and 3, so to 12, fixes:
https://github.com/gergo-salyi/multibg-wayland/issues/17
This commit is contained in:
Gergő Sályi 2025-06-15 21:16:14 +02:00
parent a7f456863c
commit bffb18ea66
1 changed files with 7 additions and 4 deletions
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11
src/wayland.rs
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@ -968,10 +968,13 @@ fn load_wallpapers(
let shm_stride = match shm_format {
wl_shm::Format::Xrgb8888 => width as usize * 4,
wl_shm::Format::Bgr888 => {
// Align buffer stride to both 4 and pixel format
// block size. Not being aligned to 4 caused
// https://github.com/gergo-salyi/multibg-wayland/issues/6
(width as usize * 3).next_multiple_of(4)
// Align buffer stride:
// - once to 4, because not being aligned to 4 caused
// https://github.com/gergo-salyi/multibg-wayland/issues/6
// - and to 3, because not being aligned to 3 caused
// https://github.com/gergo-salyi/multibg-wayland/issues/17
// So align stride to 4 * 3 = 12
(width as usize * 3).next_multiple_of(12)
},
_ => unreachable!(),
};