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#include "fivewin.ch"

FUNCTION Main()

   LOCAL oWnd
   LOCAL oBar
   LOCAL aBitmap := Array( 2 )
   
   DEFINE WINDOW oWnd TITLE "Fivewin - Watermark Bitmap"
   DEFINE BUTTONBAR oBar OF oWnd
   
   DEFINE BUTTON OF oBar ACTION ( LoadFile( aBitmap ), oWnd:Refresh() )
   
   ACTIVATE WINDOW oWnd ;
            ON PAINT ( DrawBitmap( hDC, aBitmap[ 1 ], 25, 0 ),;
                       ABPaint( hDC, nBmpWidth( aBitmap[ 1 ] ) + 5, 25, aBitmap[ 2 ], 30 ) )
   
RETURN NIL


FUNCTION LoadFile( aBitmap )

   LOCAL cFile

   cFile = cGetFile( "*.bmp", "Select BMP File" )
   
   IF aBitmap[ 1 ] != NIL 
      DeleteObject( aBitmap[ 1 ] )
      DeleteObject( aBitmap[ 2 ] )
   ENDIF
   
   IF ! Empty( cFile )
      aBitmap[ 1 ] = ReadBitmap( 0, cFile )
      aBitmap[ 2 ] = FWWaterMark( aBitmap[ 1 ] )
   ENDIF

RETURN NIL 


#pragma BEGINDUMP

#include <windows.h>
#include <hbapi.h>

BITMAPINFOHEADER PrepareInfoHeader( WORD, WORD );


HBITMAP FWWaterMark( HBITMAP hbm )
{
   BITMAPINFOHEADER bmiS, bmiD;
   LPBITMAPINFOHEADER lpSrcBits, lpDesBits;
   DWORD dwSizeScr;
   HANDLE hDibSrc;
   HDC dc, dcDes;
   BITMAP bm;
   HBITMAP hbmDes, hbmOldDes;
   INT j,i;

   GetObject( hbm, sizeof( BITMAP ), &bm );

   // source
   bmiS = PrepareInfoHeader( ( WORD ) bm.bmWidth, ( WORD ) bm.bmHeight );

   dwSizeScr = ( ( bm.bmWidth * bmiS.biBitCount + 31 ) / 32 ) * 4 * bm.bmHeight;

   hDibSrc = GlobalAlloc( GHND, dwSizeScr + sizeof( BITMAPINFOHEADER ) ); 
   lpSrcBits = ( LPBITMAPINFOHEADER )GlobalLock( hDibSrc );    
   *lpSrcBits = bmiS;


   dc = GetDC ((HWND) NULL);

   GetDIBits( dc, hbm, 0,
            ( UINT ) bm.bmHeight, 
             lpSrcBits,
            ( LPBITMAPINFO )lpSrcBits, DIB_RGB_COLORS);      
  
   dcDes = CreateCompatibleDC( NULL );   
   bmiD = PrepareInfoHeader( ( WORD ) bm.bmWidth, ( WORD ) bm.bmHeight );

   hbmDes = CreateDIBSection ( dc, ( LPBITMAPINFO )&bmiD,
       DIB_RGB_COLORS, ( void ** )&lpDesBits, 0, 0 );

   hbmOldDes  = SelectObject( dcDes, hbmDes );   

    for( j = 0; j < bm.bmHeight; ++j )
    {
       LPBYTE pbDestRGB = ( LPBYTE )&( ( DWORD * ) lpDesBits )[ j * bm.bmWidth ];
       LPBYTE pbSrcRGB  = ( LPBYTE )&( ( DWORD * ) lpSrcBits  )[ j * bm.bmWidth ];
       
       for( i = 0; i < bm.bmWidth; ++i )
       {
          pbDestRGB[ 0 ] =  pbSrcRGB[ 0 ];
          pbDestRGB[ 1 ] =  pbSrcRGB[ 1 ];
          pbDestRGB[ 2 ] =  pbSrcRGB[ 2 ];
          pbDestRGB[ 3 ] =  255;
          pbDestRGB += 4;
          pbSrcRGB  += 4;

       }  
    }
    
    SelectObject( dcDes, hbmOldDes );

    GlobalUnlock( hDibSrc );    
    GlobalFree( hDibSrc );

    DeleteDC( dcDes );
    DeleteObject( hDibSrc );
    ReleaseDC ((HWND) NULL, dc);
    
   return hbmDes;       
}
    
HB_FUNC( FWWATERMARK )  
{
   hb_retnl( ( LONG ) FWWaterMark( ( HBITMAP ) hb_parnl( 1 ) ) ) ;
}

#include "Fivewin.ch"

#define LWA_ALPHA                  2
#define GWL_EXSTYLE -20
#define WS_EX_LAYERED 524288

Function Main()

    Local oDlg, oBrush

    Define Font oFont Name "Arial" Size 0, 18 Bold
    Define Brush oBrush File "..\bitmaps\FiveWin.bmp"

    Define Dialog oDlg Size 460, 240 Pixel ;
           Style WS_POPUP Brush oBrush

    oDlg:bLClicked := {||oDlg:End()}

    @ 110, 55 Say oSay Prompt "This must be transparent" Transparent Pixel Font oFont Color CLR_HRED

    Activate Dialog oDlg Centered On Init SetTransparent( oDlg )

    oFont:End()
    oBrush:End()

Return Nil


Static Function SetTransparent( oDlg )

    SetWindowLong( oDlg:hWnd, GWL_EXSTYLE, nOr( GetWindowLong( oDlg:hWnd, GWL_EXSTYLE ), WS_EX_LAYERED ) )
    SetLayeredWindowAttributes( oDlg:hWnd, 0, 128, LWA_ALPHA )

Return Nil

bBlend.BlendOp     = AC_SRC_OVR
bBlend.BlendFlags  = 0
bBlend.AlphaFormat = 0
bBlend.SourceConstantAlpha = nTransparency