patch 8.0.1449: slow redrawing with DirectX
Problem: Slow redrawing with DirectX.
Solution: Avoid calling gui_mch_flush() unnecessarily, especially when
updating the cursor. (Ken Takata, closes #2560)
diff --git a/src/main.c b/src/main.c
index 877adaf..9cf10bd 100644
--- a/src/main.c
+++ b/src/main.c
@@ -1242,7 +1242,11 @@
if (VIsual_active)
update_curbuf(INVERTED);/* update inverted part */
else if (must_redraw)
+ {
+ mch_disable_flush(); /* Stop issuing gui_mch_flush(). */
update_screen(0);
+ mch_enable_flush();
+ }
else if (redraw_cmdline || clear_cmdline)
showmode();
redraw_statuslines();
@@ -1283,11 +1287,13 @@
|| conceal_cursor_line(curwin)
|| need_cursor_line_redraw))
{
+ mch_disable_flush(); /* Stop issuing gui_mch_flush(). */
if (conceal_old_cursor_line != conceal_new_cursor_line
&& conceal_old_cursor_line
<= curbuf->b_ml.ml_line_count)
update_single_line(curwin, conceal_old_cursor_line);
update_single_line(curwin, conceal_new_cursor_line);
+ mch_enable_flush();
curwin->w_valid &= ~VALID_CROW;
}
# endif
@@ -4212,11 +4218,7 @@
/* A client can tell us to redraw, but not to display the cursor, so do
* that here. */
setcursor();
- out_flush();
-#ifdef FEAT_GUI
- if (gui.in_use)
- gui_update_cursor(FALSE, FALSE);
-#endif
+ out_flush_cursor(FALSE, FALSE);
return res;
}