Some doc updates,

[wxWidgets.git] / src / msw / dcmemory.cpp

diff --git a/src/msw/dcmemory.cpp b/src/msw/dcmemory.cpp
index 64ff3c778f42183b6224a59a5f5f90d3564c0e29..a5f196584eaf365b4a78f4841a78d212ff8f3403 100644 (file)
--- a/src/msw/dcmemory.cpp
+++ b/src/msw/dcmemory.cpp
@@ -41,7 +41,7 @@
 // wxWin macros
 // ----------------------------------------------------------------------------
 
-    IMPLEMENT_DYNAMIC_CLASS(wxMemoryDC, wxDC)
+IMPLEMENT_DYNAMIC_CLASS(wxMemoryDC, wxDC)
 
 // ============================================================================
 // implementation
@@ -139,6 +139,13 @@ void wxMemoryDC::DoGetSize(int *width, int *height) const
     }
 }
 
+// the rest of this file deals with drawing rectangles workaround, disabled by
+// default
+
+#define wxUSE_MEMORY_DC_DRAW_RECTANGLE 0
+
+#if wxUSE_MEMORY_DC_DRAW_RECTANGLE
+
 // For some reason, drawing a rectangle on a memory DC has problems.
 // Use this substitute if we can.
 static void wxDrawRectangle(wxDC& dc, wxCoord x, wxCoord y, wxCoord width, wxCoord height)
@@ -167,22 +174,24 @@ static void wxDrawRectangle(wxDC& dc, wxCoord x, wxCoord y, wxCoord width, wxCoo
     }
 }
 
+#endif // wxUSE_MEMORY_DC_DRAW_RECTANGLE
+
 void wxMemoryDC::DoDrawRectangle(wxCoord x, wxCoord y, wxCoord width, wxCoord height)
 {
-// Set this to 0 to demonstrate strange rectangle behaviour in the Drawing sample.
-#if 0
+    // Set this to 1 to work around an apparent video driver bug
+    // (visible with e.g. 70x70 rectangle on a memory DC; see Drawing sample)
+#if wxUSE_MEMORY_DC_DRAW_RECTANGLE
     if (m_brush.Ok() && m_pen.Ok() &&
         (m_brush.GetStyle() == wxSOLID || m_brush.GetStyle() == wxTRANSPARENT) &&
-        (m_pen.GetStyle() == wxSOLID || m_pen.GetStyle() == wxTRANSPARENT))
+        (m_pen.GetStyle() == wxSOLID || m_pen.GetStyle() == wxTRANSPARENT) &&
+        (GetLogicalFunction() == wxCOPY))
     {
         wxDrawRectangle(* this, x, y, width, height);
     }
     else
+#endif // wxUSE_MEMORY_DC_DRAW_RECTANGLE
     {
         wxDC::DoDrawRectangle(x, y, width, height);
     }
-#else
-    wxDC::DoDrawRectangle(x, y, width, height);
-#endif
 }