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[client] wayland: improve fractional scaling

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avoids the 24.8 quantisation without introducing floating-point
equality/rounding behaviour throughout the Wayland state.

Closes #1257
This commit is contained in:
Geoffrey McRae
2026-05-31 13:15:42 +10:00
parent dba2d23eb2
commit 01b8724cfe
6 changed files with 103 additions and 21 deletions
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12
client/displayservers/Wayland/window.c
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@@ -33,20 +33,20 @@
void waylandWindowUpdateScale(void)
{
wl_fixed_t maxScale = 0;
struct WaylandScale maxScale = waylandScaleFromInt(0);
struct SurfaceOutput * node;
wl_list_for_each(node, &wlWm.surfaceOutputs, link)
{
wl_fixed_t scale = waylandOutputGetScale(node->output);
if (scale > maxScale)
struct WaylandScale scale = waylandOutputGetScale(node->output);
if (waylandScaleCmp(scale, maxScale) > 0)
maxScale = scale;
}
if (maxScale)
if (waylandScaleValid(maxScale))
{
wlWm.scale = maxScale;
wlWm.fractionalScale = wl_fixed_from_int(wl_fixed_to_int(maxScale)) != maxScale;
wlWm.fractionalScale = waylandScaleIsFractional(maxScale);
wlWm.needsResize = true;
waylandCursorScaleChange();
app_invalidateWindow(true);
@@ -87,7 +87,7 @@ static const struct wl_surface_listener wlSurfaceListener = {
bool waylandWindowInit(const char * title, const char * appId, bool fullscreen, bool maximize, bool borderless, bool resizable)
{
wlWm.scale = wl_fixed_from_int(1);
wlWm.scale = waylandScaleFromInt(1);
wlWm.frameEvent = lgCreateEvent(true, 0);
if (!wlWm.frameEvent)