Last FWH version. Memory leak.

[lucasdebeltran]

Yes, in my opinion it is connected with Transbmp function.

Or maybe there is a leak in Fivewin´s internals, I don´t know.

[Antonio Linares]

Lucas,

If you have a real proof of that, then I appreciate if you show it.

If not, then I appreciate if you think it twice before saying it, thanks

[Randal]

Marco & Maurizio:

Can either of you verify if you were able to measure the problem using checkres or in some other way?

Or is all we know is that toolbar icons disappear after some period of time?

Can either of you offer any other insight or feedback?

I just upgraded to FWH 1212 and then 1301 and I'm afraid to start distributing our new version.

Randal Ferguson

[lucasdebeltran]

Antonio,

Sory, the comment was not in a negative way. I do apologize for any inconvenience and thank you for your cooperation.

Yes, I did test with this function:

Code: Select all  Expand view

#pragma BEGINDUMP

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

static void TransBmp( HBITMAP hBitmap, int iXsize, int iYsize,
               COLORREF rgbTransparent, HDC hDC,
               int iXOffset, int iYOffset, int iWidth, int iHeight )
{
  HDC mDC, nDC;
  HBITMAP hMask, hBmOld1, hBmOld2;
  LPBYTE lpBits;

  mDC = CreateCompatibleDC( hDC );


  if( mDC )
  {
    hBmOld1 = ( HBITMAP ) SelectObject( mDC, hBitmap );

    lpBits = ( LPBYTE ) hb_xgrab( iXsize * iYsize * 2 );
    if( lpBits )
    {
      hMask = CreateBitmap( iXsize, iYsize, 1, 1, lpBits );
      if( hMask )
      {
        nDC = CreateCompatibleDC( hDC );
        if( nDC )
        {
          hBmOld2 = ( HBITMAP ) SelectObject( nDC, hMask );
          SetBkColor( mDC, rgbTransparent );

          BitBlt( nDC, 0, 0, iXsize, iYsize, mDC, 0, 0, SRCCOPY );

          SetStretchBltMode( hDC, COLORONCOLOR );

          StretchBlt( hDC, iXOffset, iYOffset, iWidth, iHeight,
                      mDC, 0, 0, iXsize, iYsize,
                      SRCINVERT );

          StretchBlt( hDC, iXOffset, iYOffset, iWidth, iHeight,
                      nDC, 0, 0, iXsize, iYsize,
                      SRCAND );

          StretchBlt( hDC, iXOffset, iYOffset, iWidth, iHeight,
                      mDC, 0, 0, iXsize, iYsize,
                      SRCINVERT );

          SelectObject( nDC, hBmOld2 );
          DeleteDC( nDC );
        }
        else
           MessageBox( 0, "(1) Can't create compatible DC!", "Error", 0 );

        DeleteObject( hMask );
      }
      else
        MessageBox( 0, "(2) Can't create bitmap!", "Error", 0 );

      hb_xfree( lpBits );
    }
    else
            MessageBox( 0, "(3) Can't allocate memory!", "Error", 0 );

SelectObject( mDC, hBmOld1 );
    DeleteDC( mDC );
  }
  else
     MessageBox( 0, "(4) Can't create DC!", "Error", 0 );
}

HB_FUNC( TRANSBMP )
{
   TransBmp( ( HBITMAP ) hb_parnl( 1 ), hb_parnl( 2 ), hb_parnl( 3 ), hb_parnl( 4 ),
             ( HDC ) hb_parnl( 5 ), hb_parnl( 6 ), hb_parnl( 7 ), hb_parnl( 8 ),
             hb_parnl( 9 ) );
}

#pragma ENDDUMP
 

And when the bitmap disappear I receive Error (2) Can't create bitmap!.


Hope it helps to trace the problem.


Thanks again for your attention.

[Antonio Linares]

Lucas,

Esa información si es realmente util, gracias!

hMask = CreateBitmap( iXsize, iYsize, 1, 1, lpBits );

lpBits existe y es correcto, ó no hubiese avanzado hasta ahí. Se me ocurre que los valores de iXsize ó iYsize sean erróneos (negativos) y de ahi que falle CreateBitmap()

Este error puedes reproducirlo ? Es siempre el mismo ?

[Antonio Linares]

Lucas,

Podemos interrogar por el error tan pronto como se produzca, el código a incluir es este:

Code: Select all  Expand view

  LPVOID lpMsgBuf;

   FormatMessage( FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM,
                  NULL,
                  GetLastError(),
                  MAKELANGID( LANG_NEUTRAL, SUBLANG_DEFAULT ), // Default language
                  ( LPTSTR ) &lpMsgBuf,
                  0,
                  NULL );
    MessageBox( 0, lpMsgBuf, "error", 0 );
   LocalFree( lpMsgBuf );
 

el código quedaría así:

Code: Select all  Expand view

#pragma BEGINDUMP

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

static void TransBmp( HBITMAP hBitmap, int iXsize, int iYsize,
               COLORREF rgbTransparent, HDC hDC,
               int iXOffset, int iYOffset, int iWidth, int iHeight )
{
  HDC mDC, nDC;
  HBITMAP hMask, hBmOld1, hBmOld2;
  LPBYTE lpBits;

  mDC = CreateCompatibleDC( hDC );


  if( mDC )
  {
    hBmOld1 = ( HBITMAP ) SelectObject( mDC, hBitmap );

    lpBits = ( LPBYTE ) hb_xgrab( iXsize * iYsize * 2 );
    if( lpBits )
    {
      hMask = CreateBitmap( iXsize, iYsize, 1, 1, lpBits );
      if( hMask )
      {
        nDC = CreateCompatibleDC( hDC );
        if( nDC )
        {
          hBmOld2 = ( HBITMAP ) SelectObject( nDC, hMask );
          SetBkColor( mDC, rgbTransparent );

          BitBlt( nDC, 0, 0, iXsize, iYsize, mDC, 0, 0, SRCCOPY );

          SetStretchBltMode( hDC, COLORONCOLOR );

          StretchBlt( hDC, iXOffset, iYOffset, iWidth, iHeight,
                      mDC, 0, 0, iXsize, iYsize,
                      SRCINVERT );

          StretchBlt( hDC, iXOffset, iYOffset, iWidth, iHeight,
                      nDC, 0, 0, iXsize, iYsize,
                      SRCAND );

          StretchBlt( hDC, iXOffset, iYOffset, iWidth, iHeight,
                      mDC, 0, 0, iXsize, iYsize,
                      SRCINVERT );

          SelectObject( nDC, hBmOld2 );
          DeleteDC( nDC );
        }
        else
           MessageBox( 0, "(1) Can't create compatible DC!", "Error", 0 );

        DeleteObject( hMask );
      }
      else
      {
         LPVOID lpMsgBuf;

         FormatMessage( FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM,
                  NULL,
                  GetLastError(),
                  MAKELANGID( LANG_NEUTRAL, SUBLANG_DEFAULT ), // Default language
                  ( LPTSTR ) &lpMsgBuf,
                  0,
                  NULL );
        MessageBox( 0, lpMsgBuf, "(2) Can't create bitmap!", 0 );
        LocalFree( lpMsgBuf );
      }
      hb_xfree( lpBits );
    }
    else
            MessageBox( 0, "(3) Can't allocate memory!", "Error", 0 );

SelectObject( mDC, hBmOld1 );
    DeleteDC( mDC );
  }
  else
     MessageBox( 0, "(4) Can't create DC!", "Error", 0 );
}

HB_FUNC( TRANSBMP )
{
   TransBmp( ( HBITMAP ) hb_parnl( 1 ), hb_parnl( 2 ), hb_parnl( 3 ), hb_parnl( 4 ),
             ( HDC ) hb_parnl( 5 ), hb_parnl( 6 ), hb_parnl( 7 ), hb_parnl( 8 ),
             hb_parnl( 9 ) );
}

#pragma ENDDUMP
 

[Bayron]

Colocando la función anterior, ahora al perder la imagen, obtengo este mensaje:

[Antonio Linares]

Bayron,

Por favor, prueba a cambiar esta línea asi:

static void TransBmp( HBITMAP hBitmap, unsigned int iXsize, unsigned int iYsize,

[Antonio Linares]

Otro cambio, distinto al anterior, que puede solucionar el problema:

hMask = CreateBitmap( iXsize, iYsize, 1, 1, NULL ); // lpBits );

Creo que esto solucionará el problema definitivamente

[shri_fwh]

Hi Antonio,

Would like to request to you to put the comment in english as well, as your comments are very improtant to us.

Thanks
Shridhar

[Bayron]

I have not been loosing bitmaps in the last couple of hours... so it seems to be working...

Code: Select all  Expand view

#pragma BEGINDUMP

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

static void TransBmp( HBITMAP hBitmap, unsigned int iXsize, unsigned int iYsize,
               COLORREF rgbTransparent, HDC hDC,
               int iXOffset, int iYOffset, int iWidth, int iHeight )
{
  HDC mDC, nDC;
  HBITMAP hMask, hBmOld1, hBmOld2;
  LPBYTE lpBits;

  mDC = CreateCompatibleDC( hDC );


  if( mDC )
  {
    hBmOld1 = ( HBITMAP ) SelectObject( mDC, hBitmap );

    lpBits = ( LPBYTE ) hb_xgrab( iXsize * iYsize * 2 );
    if( lpBits )
    {
      hMask = CreateBitmap( iXsize, iYsize, 1, 1, NULL ); // lpBits );
      if( hMask )
      {
        nDC = CreateCompatibleDC( hDC );
        if( nDC )
        {
          hBmOld2 = ( HBITMAP ) SelectObject( nDC, hMask );
          SetBkColor( mDC, rgbTransparent );

          BitBlt( nDC, 0, 0, iXsize, iYsize, mDC, 0, 0, SRCCOPY );

          SetStretchBltMode( hDC, COLORONCOLOR );

          StretchBlt( hDC, iXOffset, iYOffset, iWidth, iHeight,
                      mDC, 0, 0, iXsize, iYsize,
                      SRCINVERT );

          StretchBlt( hDC, iXOffset, iYOffset, iWidth, iHeight,
                      nDC, 0, 0, iXsize, iYsize,
                      SRCAND );

          StretchBlt( hDC, iXOffset, iYOffset, iWidth, iHeight,
                      mDC, 0, 0, iXsize, iYsize,
                      SRCINVERT );

          SelectObject( nDC, hBmOld2 );
          DeleteDC( nDC );
        }
        else
           MessageBox( 0, "(1) Can't create compatible DC!", "Error", 0 );

        DeleteObject( hMask );
      }
      else
      {
         LPVOID lpMsgBuf;

         FormatMessage( FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM,
                  NULL,
                  GetLastError(),
                  MAKELANGID( LANG_NEUTRAL, SUBLANG_DEFAULT ), // Default language
                  ( LPTSTR ) &lpMsgBuf,
                  0,
                  NULL );
        MessageBox( 0, lpMsgBuf, "(2) Can't create bitmap!", 0 );
        LocalFree( lpMsgBuf );
      }
      hb_xfree( lpBits );
    }
    else
            MessageBox( 0, "(3) Can't allocate memory!", "Error", 0 );

SelectObject( mDC, hBmOld1 );
    DeleteDC( mDC );
  }
  else
     MessageBox( 0, "(4) Can't create DC!", "Error", 0 );
}

HB_FUNC( TRANSBMP )
{
   TransBmp( ( HBITMAP ) hb_parnl( 1 ), hb_parnl( 2 ), hb_parnl( 3 ), hb_parnl( 4 ),
             ( HDC ) hb_parnl( 5 ), hb_parnl( 6 ), hb_parnl( 7 ), hb_parnl( 8 ),
             hb_parnl( 9 ) );
}

#pragma ENDDUMP
 

[Antonio Linares]

Bayron,

Many thanks for your tests

Shridhar,

It seems as we finally found the bug and solved it

"The mistery of the vanishing bitmaps" is over

[IBTC]

It seems as we finally found the bug and solved it

Great! Thanks to all.

[Maurizio]

Antonio,

Thank ,
I really hope that the problem it solved .

Regards Maurizio

[Antonio Linares]

Maurizio,

It was in front of our eyes all this time but we didn't see it

We were supplying a wrong buffer filled with garbage. Sometimes Windows was able to manage it, but sometimes, the memory garbish (as it was an unitialized memory block) had wrong data for WIndows. And the fact is that such buffer was not needed at all