From c063acb4a6a0ddd8a4948c844c28ee34399a6e1d Mon Sep 17 00:00:00 2001
From: Vincent Wei <vincent@minigui.org>
Date: Sun, 8 Mar 2020 19:52:40 +0800
Subject: [PATCH] fix a bug: call SyncUpdate when cursor moved; cursor surface
 lost when it was moved

---
 src/kernel/cursor-procs.c  | 3 ++-
 src/newgal/pcxvfb/pcxvfb.c | 5 +++++
 2 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/src/kernel/cursor-procs.c b/src/kernel/cursor-procs.c
index 8cef5fe5..d797507f 100644
--- a/src/kernel/cursor-procs.c
+++ b/src/kernel/cursor-procs.c
@@ -933,6 +933,7 @@ BOOL kernel_RefreshCursor (int* x, int* y, int* button)
             }
 
             showcursor ();
+            GAL_SyncUpdate (__gal_screen);
         }
 
         // GAL_SyncUpdate (__gal_screen);
@@ -944,7 +945,7 @@ BOOL kernel_RefreshCursor (int* x, int* y, int* button)
             if (csr_bmp.bmBits) {
                 hidecursor ();
                 showcursor ();
-                // GAL_SyncUpdate (__gal_screen);
+                GAL_SyncUpdate (__gal_screen);
             }
             else {
                 PCURSOR pcsr = (PCURSOR)CSR_CURRENT;
diff --git a/src/newgal/pcxvfb/pcxvfb.c b/src/newgal/pcxvfb/pcxvfb.c
index a0f5eeb8..ad18ad73 100644
--- a/src/newgal/pcxvfb/pcxvfb.c
+++ b/src/newgal/pcxvfb/pcxvfb.c
@@ -277,6 +277,7 @@ static int PCXVFB_SetCursor (_THIS, GAL_Surface *surface, int hot_x, int hot_y)
         PCXVFB_UpdateRects (this, 1, &rect);
     }
 
+    PCXVFB_SyncUpdate (this);
     return 0;
 }
 
@@ -288,6 +289,7 @@ static int PCXVFB_MoveCursor (_THIS, int x, int y)
     }
 
     if (this->hidden->cursor) {
+        GAL_Surface* tmp;
         GAL_Rect rect;
         rect.x = boxleft (this);
         rect.y = boxtop (this);
@@ -295,10 +297,12 @@ static int PCXVFB_MoveCursor (_THIS, int x, int y)
         rect.h = CURSORHEIGHT;
 
         /* update screen to hide cursor */
+        tmp = this->hidden->cursor;
         this->hidden->cursor = NULL;
         PCXVFB_UpdateRects (this, 1, &rect);
 
         /* update screen to show cursor */
+        this->hidden->cursor = tmp;
         this->hidden->csr_x = x;
         this->hidden->csr_y = y;
 
@@ -307,6 +311,7 @@ static int PCXVFB_MoveCursor (_THIS, int x, int y)
         rect.w = CURSORWIDTH;
         rect.h = CURSORHEIGHT;
         PCXVFB_UpdateRects (this, 1, &rect);
+        PCXVFB_SyncUpdate (this);
     }
     else {
         this->hidden->csr_x = x;