silence more valgrind spew on scanline-extended deadspace

Change-Id: I8607d9d405a3996699ef85564938628624987385

vcl/Library_vcl.mk

@@ -429,6 +429,13 @@ vcl_headless_code=\
     vcl/headless/svptext \
     vcl/headless/svpvd
 
+$(eval $(call gb_Library_add_defs,vcl,\
+    $(if $(VALGRIND_CFLAGS), \
+        $(VALGRIND_CFLAGS) \
+        -DHAVE_MEMCHECK_H=1 \
+    ) \
+))
+
 ifeq ($(GUIBASE),unx)
 $(eval $(call gb_Library_add_defs,vcl,\
     -DSAL_DLLPREFIX=\"$(gb_Library_SYSPRE)\" \

vcl/source/gdi/bitmap2.cxx

@@ -36,6 +36,10 @@
 
 #include <utility>
 
+#if defined(HAVE_MEMCHECK_H)
+#include <memcheck.h>
+#endif
+
 
 // -----------
 // - Defines -
@@ -903,6 +907,18 @@ sal_Bool Bitmap::ImplWriteDIBPalette( SvStream& rOStm, BitmapReadAccess& rAcc )
 
 // ------------------------------------------------------------------
 
+#if defined(HAVE_MEMCHECK_H)
+namespace
+{
+    void blankExtraSpace(sal_uInt8 *pBits, long nWidth, long nScanlineSize, int nBitCount)
+    {
+        size_t nExtraSpaceInScanLine = nScanlineSize - nWidth * nBitCount / 8;
+        if (nExtraSpaceInScanLine)
+            memset(pBits + (nScanlineSize - nExtraSpaceInScanLine), 0, nExtraSpaceInScanLine);
+    }
+}
+#endif
+
 sal_Bool Bitmap::ImplWriteDIBBits( SvStream& rOStm, BitmapReadAccess& rAcc,
                                sal_uLong nCompression, sal_uInt32& rImageSize )
 {
@@ -975,6 +991,10 @@ sal_Bool Bitmap::ImplWriteDIBBits( SvStream& rOStm, BitmapReadAccess& rAcc,
             const long  nWidth = rAcc.Width();
             const long  nHeight = rAcc.Height();
             sal_uInt8*      pBuf = new sal_uInt8[ nAlignedWidth ];
+#if defined(HAVE_MEMCHECK_H)
+            if (RUNNING_ON_VALGRIND)
+                blankExtraSpace(pBuf, nWidth, nAlignedWidth, discretizeBitcount(nBitCount));
+#endif
             sal_uInt8*      pTmp;
             sal_uInt8       cTmp;
 

vcl/unx/generic/gdi/salbmp.cxx

@@ -118,15 +118,18 @@ void X11SalBitmap::ImplRemovedFromCache()
 }
 
 #if defined(HAVE_MEMCHECK_H)
-void blankExtraSpace(BitmapBuffer* pDIB)
+namespace
 {
-    size_t nExtraSpaceInScanLine = pDIB->mnScanlineSize - pDIB->mnWidth * pDIB->mnBitCount / 8;
-    if (nExtraSpaceInScanLine)
+    void blankExtraSpace(BitmapBuffer* pDIB)
     {
-        for (long i = 0; i < pDIB->mnHeight; ++i)
+        size_t nExtraSpaceInScanLine = pDIB->mnScanlineSize - pDIB->mnWidth * pDIB->mnBitCount / 8;
+        if (nExtraSpaceInScanLine)
         {
-            sal_uInt8 *pRow = pDIB->mpBits + (i * pDIB->mnScanlineSize);
-            memset(pRow + (pDIB->mnScanlineSize - nExtraSpaceInScanLine), 0, nExtraSpaceInScanLine);
+            for (long i = 0; i < pDIB->mnHeight; ++i)
+            {
+                sal_uInt8 *pRow = pDIB->mpBits + (i * pDIB->mnScanlineSize);
+                memset(pRow + (pDIB->mnScanlineSize - nExtraSpaceInScanLine), 0, nExtraSpaceInScanLine);
+            }
         }
     }
 }