Fixing disappearing and out of place jumpy windows

src/common.h

@@ -36,9 +36,9 @@
 #include <X11/Xlib.h>
 #include <ev.h>
 #include <pixman.h>
-#include <xcb/xproto.h>
 #include <xcb/render.h>
 #include <xcb/sync.h>
+#include <xcb/xproto.h>
 
 #include "uthash_extra.h"
 #ifdef CONFIG_OPENGL
@@ -55,11 +55,11 @@
 #include "backend/driver.h"
 #include "compiler.h"
 #include "config.h"
+#include "list.h"
 #include "region.h"
+#include "render.h"
 #include "types.h"
 #include "utils.h"
-#include "list.h"
-#include "render.h"
 #include "win_defs.h"
 #include "x.h"
 
@@ -254,11 +254,11 @@ typedef struct session {
 	// Cached blur convolution kernels.
 	struct x_convolution_kernel **blur_kerns_cache;
 	/// If we should quit
-	bool quit:1;
+	bool quit : 1;
 	/// Whether there are pending updates, like window creation, etc.
 	/// TODO use separate flags for dfferent kinds of updates so we don't
 	/// waste our time.
-	bool pending_updates:1;
+	bool pending_updates : 1;
 
 	// === Expose event related ===
 	/// Pointer to an array of <code>XRectangle</code>-s of exposed region.
@@ -534,8 +534,12 @@ static inline void wintype_arr_enable(bool arr[]) {
 	}
 }
 
-
 /**
  * Get current system clock in milliseconds.
  */
 int64_t get_time_ms(void);
+
+/**
+ * Get current system clock in microseconds * 40.
+ */
+int64_t get_time_40us(void);

src/picom.c

@@ -124,6 +124,15 @@ static inline void free_xinerama_info(session_t *ps) {
  * Get current system clock in milliseconds.
  */
 int64_t get_time_ms(void) {
+	struct timespec tp;
+	clock_gettime(CLOCK_MONOTONIC, &tp);
+	return (int64_t)tp.tv_sec * 1000 + (int64_t)tp.tv_nsec / 1000000;
+}
+
+/**
+ * Get current system clock in microseconds * 40.
+ */
+int64_t get_time_40us(void) {
 	struct timespec tp;
 	clock_gettime(CLOCK_MONOTONIC, &tp);
 	//	return (int64_t)tp.tv_sec * 1000 + (int64_t)tp.tv_nsec / 1000000;
@@ -425,7 +434,7 @@ static struct managed_win *paint_preprocess(session_t *ps, bool *fade_running) {
 
 	// Fading step calculation
 	long steps = 0L;
-	auto now = get_time_ms();
+	auto now = get_time_40us();
 	if (ps->fade_time) {
 		assert(now >= ps->fade_time);
 		steps = (now - ps->fade_time) / ps->o.fade_delta;