add .cxx file for SalBitmap

And move the non-trivial virtual UpdateChecksum() there.

Change-Id: I6776a51373e375e12f1ec9588a9c49410ae5124a

1 files changed, 1 insertions, 23 deletions

diff --git a/vcl/inc/salbmp.hxx b/vcl/inc/salbmp.hxx
index bd2f061cb310..103856dfae26 100644
--- a/vcl/inc/salbmp.hxx
+++ b/vcl/inc/salbmp.hxx
@@ -101,29 +101,7 @@ protected:
     bool           mbChecksumValid;
 
 protected:
-    virtual void updateChecksum() const
-    {
-        if (mbChecksumValid)
-            return;
-
-        BitmapChecksum nCrc = 0;
-        SalBitmap* pThis = const_cast<SalBitmap*>(this);
-        BitmapBuffer* pBuf = pThis->AcquireBuffer(BitmapAccessMode::Read);
-        if (pBuf)
-        {
-            nCrc = pBuf->maPalette.GetChecksum();
-            nCrc = vcl_get_checksum(nCrc, pBuf->mpBits, pBuf->mnScanlineSize * pBuf->mnHeight);
-            pThis->ReleaseBuffer(pBuf, BitmapAccessMode::Read);
-            pThis->mnChecksum = nCrc;
-            pThis->mbChecksumValid = true;
-        }
-        else
-        {
-            pThis->mbChecksumValid = false;
-        }
-    }
-
-
+    virtual void updateChecksum() const;
 };
 
 #endif