expand this 1980's shift-fest, torture-by-ternery and magic '3' into human

Change-Id: Ifb18d5fd0b330dde0edc428621af417ddc836b21

include/vcl/dibtools.hxx

@@ -24,14 +24,20 @@
 #include <tools/rc.hxx>
 #include <vcl/region.hxx>
 
-
 // predefines
 
 class SvStream;
 class BitmapEx;
 class Bitmap;
 
+// - Compression defines
 
+#define COMPRESS_OWN                ('S'|('D'<<8UL))
+#define COMPRESS_NONE               ( 0UL )
+#define RLE_8                       ( 1UL )
+#define RLE_4                       ( 2UL )
+#define BITFIELDS                   ( 3UL )
+#define ZCOMPRESS                   ( COMPRESS_OWN | 0x01000000UL ) /* == 'SD01' (binary) */
 
 bool VCL_DLLPUBLIC ReadDIB( // ReadDIB(rBitmap, rIStm, true);
     Bitmap& rTarget,

vcl/source/filter/wmf/emfwr.cxx

@@ -856,15 +856,29 @@ void EMFWriter::ImplWriteBmpRecord( const Bitmap& rBmp, const Point& rPt,
         aMemStm.SeekRel( 8 );
         aMemStm.ReadUInt32( nColsUsed );
 
-        nPalCount = ( nBitCount <= 8 ) ? ( nColsUsed ? nColsUsed : ( 1 << (sal_uInt32) nBitCount ) ) :
-                                         ( ( 3 == nCompression ) ? 3 : 0 );
+        if (nBitCount <= 8)
+        {
+            if (nColsUsed)
+                nPalCount = nColsUsed;
+            else
+                nPalCount = 1 << (sal_uInt32)nBitCount;
+        }
+        else
+        {
+            if (nCompression == BITFIELDS)
+                nPalCount = 3;
+            else
+                nPalCount = 0;
+        }
+
+        sal_uInt32 nPalSize = nPalCount * 4;
 
         m_rStm.Write( aMemStm.GetData(), nDIBSize );
 
         const sal_uLong nEndPos = m_rStm.Tell();
         m_rStm.Seek( nOffPos );
-        m_rStm.WriteUInt32( 80 ).WriteUInt32( nHeaderSize + ( nPalCount << 2 ) );
-        m_rStm.WriteUInt32( 80 + ( nHeaderSize + ( nPalCount << 2 ) ) ).WriteUInt32( nImageSize );
+        m_rStm.WriteUInt32( 80 ).WriteUInt32( nHeaderSize + nPalSize );
+        m_rStm.WriteUInt32( 80 + nHeaderSize + nPalSize ).WriteUInt32( nImageSize );
         m_rStm.Seek( nEndPos );
 
         ImplEndRecord();

vcl/source/gdi/dibtools.cxx

@@ -37,15 +37,6 @@
 #define DIBINFOHEADERSIZE       ( sizeof(DIBInfoHeader) )
 #define DIBV5HEADERSIZE         ( sizeof(DIBV5Header) )
 
-// - Compression defines
-
-#define COMPRESS_OWN                ('S'|('D'<<8UL))
-#define COMPRESS_NONE               ( 0UL )
-#define RLE_8                       ( 1UL )
-#define RLE_4                       ( 2UL )
-#define BITFIELDS                   ( 3UL )
-#define ZCOMPRESS                   ( COMPRESS_OWN | 0x01000000UL ) /* == 'SD01' (binary) */
-
 // - DIBInfoHeader and DIBV5Header
 
 typedef sal_Int32 FXPT2DOT30;