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wayland: surface_scale(): implement fractional scaling

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This is done by setting the surface’s viewport destination
This commit is contained in:
Daniel Eklöf 2023-06-26 17:32:01 +02:00
parent 36818459e5
commit 8ccabb7974
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1 changed files with 11 additions and 2 deletions
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13
wayland.c
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@ -1889,11 +1889,20 @@ wayl_surface_scale_explicit_width_height(
const struct wayland *wayl, const struct wayl_surface *surf,
int width, int height, float scale)
{
LOG_WARN("scaling by a factor of %.2f (legacy)", scale);
if (wayl_fractional_scaling(wayl)) {
BUG("not yet implemented");
#if defined(HAVE_FRACTIONAL_SCALE)
LOG_DBG("scaling by a factor of %.2f (fractional scaling)", scale);
wp_viewport_set_destination(
surf->viewport,
round((float)width / scale),
round((float)height / scale));
#else
BUG("wayl_fraction_scaling() returned true, "
"but fractional scaling was not available at compile time").
#endif
} else {
LOG_DBG("scaling by a factor of %.2f (legacy)", scale);
wl_surface_set_buffer_scale(surf->surf, (int)scale);
}
}