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New backends: smoothly fade blur-texture on fade-in/-out

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* Add new field `opacity_target_old` to `struct managed_win` for
tracking relevant `opacity_target` changes.
* Smoothly fade blur-texture opacity on window opacity changes (based on
window opacity), when the window was or will be fully transparent
(`w->opacity ~< 0.004`).
* Fixed alpha-clipping of the blur-texture when using `inactive-opacity` or
repeatedly setting window opacity with large fade intervals (should fix #314).
This commit is contained in:
Bernd Busse
2019-12-20 20:17:38 +01:00
committed by Yuxuan Shui
parent 32754b0262
commit ad8632b017
5 changed files with 84 additions and 25 deletions
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3
src/win.h
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@ -192,6 +192,8 @@ struct managed_win {
double opacity;
/// Target window opacity.
double opacity_target;
/// Previous window opacity.
double opacity_target_old;
/// true if window (or client window, for broken window managers
/// not transferring client window's _NET_WM_OPACITY value) has opacity prop
bool has_opacity_prop;
@ -287,6 +289,7 @@ void win_set_focused(session_t *ps, struct managed_win *w);
bool attr_pure win_should_fade(session_t *ps, const struct managed_win *w);
void win_update_prop_shadow_raw(session_t *ps, struct managed_win *w);
void win_update_prop_shadow(session_t *ps, struct managed_win *w);
void win_update_opacity_target(session_t *ps, struct managed_win *w);
void win_on_factor_change(session_t *ps, struct managed_win *w);
/**
* Update cache data in struct _win that depends on window size.