Changeset 10060 for trunk/src/user32/win32wbase.cpp

Timestamp:

May 2, 2003, 5:33:17 PM (22 years ago)

Author:

sandervl

Message:

Keep track of all open DCs and query the visible region during WM_VRNENABLED to work around a PM bug

File:

• trunk/src/user32/win32wbase.cpp (modified) (3 diffs)

trunk/src/user32/win32wbase.cpp

@@ -1 @@
-/* $Id: win32wbase.cpp,v 1.369 2003-04-28 08:41:08 sandervl Exp $ */
+/* $Id: win32wbase.cpp,v 1.370 2003-05-02 15:33:16 sandervl Exp $ */
 /*
  * Win32 Window Base Class for OS/2
@@ -199 +199 @@
 
   pfnOldPMWndProc     = NULL;
+
+  memset(hdcWindow, 0, sizeof(hdcWindow));
+  nrOpenDCs           = 0;
 }
 //******************************************************************************
@@ -4078 +4081 @@
         lpVisRgnNotifyProc(getWindowHandle(), fDrawingAllowed, dwVisRgnNotifyParam);
     }
+}
+//******************************************************************************
+// Win32BaseWindow::queryOpenDCs
+//
+// Return the DCs that are currently open for this window
+//
+// Parameters:
+//    HDC *phdcWindow   - pointer to HDC array    (IN)
+//    int  chdcWindow   - size of HDC array       (IN)
+//    int *pnrdcs       - number of HDCs returned (OUT)
+// 
+// Returns:
+//    TRUE              - Success
+//    FALSE             - Failure
+//
+//******************************************************************************
+BOOL Win32BaseWindow::queryOpenDCs(HDC *phdcWindow, int  chdcWindow, int *pnrdcs)
+{
+    if(nrOpenDCs == 0) return FALSE;
+
+    if(chdcWindow < nrOpenDCs) {
+        DebugInt3();
+        return FALSE;
+    }
+
+    int j = 0;
+    for(int i=0;i<MAX_OPENDCS && j<nrOpenDCs;i++) {
+        if(hdcWindow[i] != 0) {
+            phdcWindow[j] = hdcWindow[i];
+            j++;
+        }
+    }
+    *pnrdcs = nrOpenDCs;
+    return TRUE;
+}
+//******************************************************************************
+// Win32BaseWindow::addOpenDC
+//
+// Add DC to list of open DCS
+//
+// Parameters:
+//    HDC hdc            - HDC to be added to our list of open DCs
+// 
+// Returns:
+//
+//******************************************************************************
+void Win32BaseWindow::addOpenDC(HDC hdc)
+{
+    for(int i=0;i<MAX_OPENDCS;i++) {
+        if(hdcWindow[i] == 0) {
+            hdcWindow[i] = hdc;
+            break;
+        }
+    }
+    if(i == MAX_OPENDCS) {
+        DebugInt3(); //no room!
+        return;
+    }
+
+    nrOpenDCs++;
+}
+//******************************************************************************
+// Win32BaseWindow::removeOpenDC
+//
+// Remove DC from list of open DCS
+//
+// Parameters:
+//    HDC hdc            - HDC to be removed from our list of open DCs
+// 
+// Returns:
+//
+//******************************************************************************
+void Win32BaseWindow::removeOpenDC(HDC hdc)
+{
+    if(nrOpenDCs == 0) {
+        DebugInt3();
+        return;
+    }
+    for(int i=0;i<MAX_OPENDCS;i++) {
+        if(hdcWindow[i] == hdc) {
+            hdcWindow[i] = 0;
+            break;
+        }
+    }
+    if(i == MAX_OPENDCS) {
+        DebugInt3(); //not found
+        return;
+    }
+    nrOpenDCs--;
 }
 //******************************************************************************