Changeset 714 for trunk/src/gui/painting/qwindowsurface_pm.cpp

Timestamp:

Apr 28, 2010, 8:41:11 PM (15 years ago)

Author:

Dmitry A. Kuminov

Message:

gui: Added a special direct Dive framebuffer access mode that hides the mouse pointer to avoid screen corruption under it that takes place when the video driver uses a software mouse pointer (activated by QT_PM_DIVE=FBSWM).

File:

• trunk/src/gui/painting/qwindowsurface_pm.cpp (modified) (6 diffs)

trunk/src/gui/painting/qwindowsurface_pm.cpp

@@ -254 +254 @@
 static HDIVE diveHandle = NULLHANDLE;
 static char *diveFrameBuf = NULL;
+static bool diveHideMouse = false;
+
+static LONG mousePtrSize = 0;
 
 ////////////////////////////////////////////////////////////////////////////////
@@ -663 +666 @@
                 // use direct framebuffer access
                 diveUseFB = true;
+            } else if (diveEnv == "FBSWM") {
+                // use direct framebuffer access, hide the mouse pointer
+                diveUseFB = true;
+                diveHideMouse = true;
             } else {
                 // disable DIVE by default due to bugs in the Panorama driver
@@ -776 +783 @@
                     }
                 }
+
+                mousePtrSize = WinQuerySysValue(HWND_DESKTOP, SV_CXPOINTER);
             }
         }
@@ -781 +790 @@
         DEBUG_VAR(diveDllOK);
         DEBUG_VAR(diveUseFB);
+        DEBUG_VAR(diveHideMouse);
     }
 
@@ -884 +894 @@
 
     const int srcBytesPerLine = d->image->bytesPerLine();
+
+    bool ptrHidden = false;
+    if (diveHideMouse) {
+        // DIVE is not able to preserve the software mouse pointer when
+        // painting over it using the direct framebuffer access. We have to
+        // hide it to avoid screen corruption underneath
+        POINTL ptrPos;
+        if (WinQueryPointerPos(HWND_DESKTOP, &ptrPos)) {
+            ptrPos.x -= d->setup.lScreenPosX;
+            ptrPos.y = diveCaps.ulVerticalResolution - ptrPos.y - 1 -
+                       d->setup.lScreenPosY;
+            // keep a safety zone around the rectangle to each direction
+            // as we don't know the exact mouse pointer configuration
+            if (ptrPos.x >= (src.left() - mousePtrSize) &&
+                ptrPos.x <= (src.right() + mousePtrSize) &&
+                ptrPos.y >= (src.top() - mousePtrSize) &&
+                ptrPos.y <= (src.bottom() + mousePtrSize))
+                ptrHidden = WinShowPointer(HWND_DESKTOP, FALSE);
+        }
+    }
 
     if (DiveAcquireFrameBuffer(d->hDive, &rclDst) == DIVE_SUCCESS) {
@@ -1031 +1061 @@
         DiveDeacquireFrameBuffer(d->hDive);
     }
+
+    if (ptrHidden)
+        WinShowPointer(HWND_DESKTOP, TRUE);
 }