X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/957ea55146a1dd3e29ea803936527344672a947f..c8f80d27586a190927d491c618f48a4253246728:/src/common/dcbufcmn.cpp

diff --git a/src/common/dcbufcmn.cpp b/src/common/dcbufcmn.cpp
index ef8b9a34e6..8c6c25b40e 100644
--- a/src/common/dcbufcmn.cpp
+++ b/src/common/dcbufcmn.cpp
@@ -59,6 +59,14 @@ public:
                     h > ms_buffer->GetHeight() )
         {
             delete ms_buffer;
+
+            // we must always return a valid bitmap but creating a bitmap of
+            // size 0 would fail, so create a 1*1 bitmap in this case
+            if ( !w )
+                w = 1;
+            if ( !h )
+                h = 1;
+
             ms_buffer = new wxBitmap(w, h);
         }
 
@@ -91,9 +99,6 @@ bool wxSharedDCBufferManager::ms_usingSharedBuffer = false;
 
 IMPLEMENT_DYNAMIC_CLASS(wxSharedDCBufferManager, wxModule)
 
-IMPLEMENT_DYNAMIC_CLASS(wxBufferedDC, wxMemoryDC)
-IMPLEMENT_ABSTRACT_CLASS(wxBufferedPaintDC, wxBufferedDC)
-
 // ============================================================================
 // wxBufferedDC
 // ============================================================================