[hackers] [st] Update XIM cursor position only if changed || Ivan Tham

From: <git_AT_suckless.org>
Date: Sun, 19 Apr 2020 19:54:55 +0200 (CEST)

commit 72e3f6c7c05b4d5b56388508bb20a863aec279f5
Author: Ivan Tham <pickfire_AT_riseup.net>
AuthorDate: Sun Apr 19 19:38:39 2020 +0200
Commit: Hiltjo Posthuma <hiltjo_AT_codemadness.org>
CommitDate: Sun Apr 19 19:39:48 2020 +0200

    Update XIM cursor position only if changed
    
    Updating XIM cursor position is expensive, so only update it when cursor
    position changed.

diff --git a/st.c b/st.c
index 9e568c6..0ce6ac2 100644
--- a/st.c
+++ b/st.c
_AT_@ -2571,6 +2571,7 @@ void
 drawregion(int x1, int y1, int x2, int y2)
 {
         int y;
+
         for (y = y1; y < y2; y++) {
                 if (!term.dirty[y])
                         continue;
_AT_@ -2583,7 +2584,7 @@ drawregion(int x1, int y1, int x2, int y2)
 void
 draw(void)
 {
- int cx = term.c.x;
+ int cx = term.c.x, ocx = term.ocx, ocy = term.ocy;
 
         if (!xstartdraw())
                 return;
_AT_@ -2599,9 +2600,11 @@ draw(void)
         drawregion(0, 0, term.col, term.row);
         xdrawcursor(cx, term.c.y, term.line[term.c.y][cx],
                         term.ocx, term.ocy, term.line[term.ocy][term.ocx]);
- term.ocx = cx, term.ocy = term.c.y;
+ term.ocx = cx;
+ term.ocy = term.c.y;
         xfinishdraw();
- xximspot(term.ocx, term.ocy);
+ if (ocx != term.ocx || ocy != term.ocy)
+ xximspot(term.ocx, term.ocy);
 }
 
 void
Received on Sun Apr 19 2020 - 19:54:55 CEST