[reactos] 01/01: [WIN32SS:ENG] Call display mouse functions only when using hardware pointer

[Hervé Poussineau]

https://git.reactos.org/?p=reactos.git;a=commitdiff;h=162de4a0d880ef36944a8…

commit 162de4a0d880ef36944a845580d6b01ea7414f10
Author:     Hervé Poussineau <hpoussin(a)reactos.org>
AuthorDate: Tue Oct 11 18:56:04 2022 +0200
Commit:     Hervé Poussineau <hpoussin(a)reactos.org>
CommitDate: Tue Oct 11 19:04:59 2022 +0200

    [WIN32SS:ENG] Call display mouse functions only when using hardware pointer
    
    Otherwise, use software pointer functions.
    
    This fixes graphical glitches on cursor change, when the display driver
    provides accelerated pointer functions (DrvSetPointerShape/DrvMovePointer),
    but refuses to handle a certain cursor.
    
    These graphical glitches may be reproduced:
    - by using Voodoo driver SFFT 1.9
    - by using framebuf_new.dll instead of framebuf.dll
    - by using the panning driver (setting DefaultSettings.XPanning and
      DefaultSettings.YPanning in registry)
---
 win32ss/gdi/eng/mouse.c | 19 ++++++++++++++-----
 1 file changed, 14 insertions(+), 5 deletions(-)

diff --git a/win32ss/gdi/eng/mouse.c b/win32ss/gdi/eng/mouse.c
index c8de250aa1f..9cbadcd87a7 100644
--- a/win32ss/gdi/eng/mouse.c
+++ b/win32ss/gdi/eng/mouse.c
@@ -84,7 +84,10 @@ MouseSafetyOnDrawStart(
         && pgp->Exclude.top <= HazardY2)
     {
         ppdev->SafetyRemoveLevel = ppdev->SafetyRemoveCount;
-        ppdev->pfnMovePointer(&ppdev->pSurface->SurfObj, -1, -1, NULL);
+        if (ppdev->flFlags & PDEV_HARDWARE_POINTER)
+            ppdev->pfnMovePointer(&ppdev->pSurface->SurfObj, -1, -1, NULL);
+        else if (ppdev->flFlags & PDEV_SOFTWARE_POINTER)
+            EngMovePointer(&ppdev->pSurface->SurfObj, -1, -1, NULL);
     }
 
     return TRUE;
@@ -116,10 +119,16 @@ MouseSafetyOnDrawEnd(
         return FALSE;
     }
 
-    ppdev->pfnMovePointer(&ppdev->pSurface->SurfObj,
-                          gpsi->ptCursor.x,
-                          gpsi->ptCursor.y,
-                          &pgp->Exclude);
+    if (ppdev->flFlags & PDEV_HARDWARE_POINTER)
+        ppdev->pfnMovePointer(&ppdev->pSurface->SurfObj,
+                              gpsi->ptCursor.x,
+                              gpsi->ptCursor.y,
+                              &pgp->Exclude);
+    else if (ppdev->flFlags & PDEV_SOFTWARE_POINTER)
+        EngMovePointer(&ppdev->pSurface->SurfObj,
+                       gpsi->ptCursor.x,
+                       gpsi->ptCursor.y,
+                       &pgp->Exclude);
 
     ppdev->SafetyRemoveLevel = 0;