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desktop-shell: Force scale to 1 for single pixel buffer

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Now that we use single pixel buffer, we need to be careful to only use
scale of 1, as other scales are supposed to generate an INVALID_SIZE
protocol errors (because the buffer size is not an integer multiple
of the scale).

Right now a bad scale just breaks background repaints, but in the future
we'll properly validate scale, which would cause the shell client to
be disconnected.

Fixes: 6cc8f48cd ("clients: Paint desktop-shell color background with single-pixel-buffer")

Signed-off-by: Derek Foreman <derek.foreman@collabora.com>
This commit is contained in:
Derek Foreman 2025-10-14 12:01:50 -05:00
parent 52503ba9e6
commit 5a3f3c7ca7
1 changed files with 5 additions and 1 deletions
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6
clients/desktop-shell.c
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@ -806,6 +806,9 @@ background_draw(struct widget *widget, void *data)
uint32_t r8, g8, b8;
uint32_t r32, g32, b32;
/* Single pixel buffer must use scale 1 */
window_set_buffer_scale(background->window, 1);
sp_manager = display_get_single_pixel_buffer_manager(display);
assert(sp_manager);
wl_surface = widget_get_wl_surface(background->widget);
@ -1379,10 +1382,11 @@ output_handle_scale(void *data,
int32_t scale)
{
struct output *output = data;
struct background *background = output->background;
if (output->panel)
window_set_buffer_scale(output->panel->window, scale);
if (output->background)
if (background && !background->color)
window_set_buffer_scale(output->background->window, scale);
}