Solved

Blitting problems on win98

Posted on 2004-04-22
6
201 Views
Last Modified: 2010-04-01
My application has a custom UI like that of winamp.  What I do is blit to a DC them flip it to the HDC of my window.  This works great on win2000/xp but when I test the program on win98 the window turns black after a minute.  I have run boundschecker and cannot find any resource leaks or errors.  I'm pretty much using the C API's and have checked them all for compatibility and they seem fine.  Is there anything I'm missing here?
0
Comment
Question by:alsmorris
  • 2
6 Comments
 
LVL 6

Expert Comment

by:Mafalda
ID: 10897914
Are you sure that the video settings of both 2000 and 98 are similar ?
Maybe the black screen is caused by a video setting difference (including extra technologies installed like directx etc.)

If the environment is similar you would need to post the code so we could take a look at what you do.
0
 

Author Comment

by:alsmorris
ID: 10902358
Mafalda,

I'm not using DX just API's  here is the code.  it's called from a timer callback.



void CApplication::DrawBG()
{

      m_BitmapDC = ::CreateCompatibleDC(m_ParentDC);
      HBITMAP hOldBit = NULL;

      //top Left

      HBITMAP hBitmapTopLeft = (HBITMAP)::LoadBitmap(hInst,(LPCTSTR)IDB_APP_TOPLEFT);
      SIZE BitmapSizeTopLeft;

      BitmapSizeTopLeft.cx = 22;
      BitmapSizeTopLeft.cy = 27;
      

      hOldBit = (HBITMAP)::SelectObject(m_BitmapDC,hBitmapTopLeft);

      RECT rDraw;
      rDraw.left = 0;
      rDraw.top =0;
      rDraw.bottom = BitmapSizeTopLeft.cy;
      rDraw.right = BitmapSizeTopLeft.cx;
      
      
      ::BitBlt(      m_hDC,//      pDC,
                        0,
                        0,
                        BitmapSizeTopLeft.cx,
                        BitmapSizeTopLeft.cy,
                        m_BitmapDC,                              
                        0, 0,
                        SRCCOPY);      
      

      ::DeleteObject((HBITMAP)::SelectObject(m_BitmapDC,hBitmapTopLeft));


      //top right

      HBITMAP hBitmapTopRight = (HBITMAP)::LoadBitmap(hInst,(LPCTSTR)IDB_APP_TOPRIGHT);
      SIZE BitmapSizeTopRight;

      BitmapSizeTopRight.cx = 36;
      BitmapSizeTopRight.cy = 27;
      

      hOldBit = (HBITMAP)::SelectObject(m_BitmapDC,hBitmapTopRight);



      ::BitBlt(      m_hDC,//      pDC,
                        m_rUI.right - BitmapSizeTopRight.cx,
                        0,
                        BitmapSizeTopRight.cx,
                        BitmapSizeTopRight.cy,
                        m_BitmapDC,                              
                        0, 0,
                        SRCCOPY);      


      ::DeleteObject((HBITMAP)::SelectObject(m_BitmapDC,hBitmapTopRight));
      //top middle

      HBITMAP hBitmapTopMiddle = (HBITMAP)::LoadBitmap(hInst,(LPCTSTR)IDB_APP_TOPMIDDLE);
      SIZE BitmapSizeTopMiddle;

      BitmapSizeTopMiddle.cx = 9;
      BitmapSizeTopMiddle.cy = 27;
      

      hOldBit = (HBITMAP)::SelectObject(m_BitmapDC,hBitmapTopMiddle);
      int StartX = m_rUI.left + BitmapSizeTopLeft.cx;
      int StartY = 0;

      int nStrWidth =  (m_rUI.right - BitmapSizeTopRight.cx) - BitmapSizeTopMiddle.cx;
      

      ::StretchBlt(      m_hDC,
                              StartX ,
                              StartY,
                              nStrWidth,
                              BitmapSizeTopMiddle.cy,
                              m_BitmapDC,                              
                              0, 0,
                              BitmapSizeTopMiddle.cx,
                              BitmapSizeTopMiddle.cy,
                              SRCCOPY);      


      ::DeleteObject((HBITMAP)::SelectObject(m_BitmapDC,hBitmapTopMiddle));

      //Bottom Right
      HBITMAP hBitmapBottomRight = (HBITMAP)::LoadBitmap(hInst,(LPCTSTR)IDB_APP_BOTTOMRIGHT);
      SIZE BitmapSizeBottomRight;

      BitmapSizeBottomRight.cx = 99;
      BitmapSizeBottomRight.cy = 157;
      

      hOldBit = (HBITMAP)::SelectObject(m_BitmapDC,hBitmapBottomRight);



      ::BitBlt(      m_hDC,//      pDC,
                        m_rUI.right - BitmapSizeBottomRight.cx ,
                        m_rUI.bottom - BitmapSizeBottomRight.cy,
                        BitmapSizeBottomRight.cx,
                        BitmapSizeBottomRight.cy,
                        m_BitmapDC,                              
                        0, 0,
                        SRCCOPY);      


      ::DeleteObject((HBITMAP)::SelectObject(m_BitmapDC,hBitmapBottomRight));

//Bottom Left
      HBITMAP hBitmapBottomLeft = (HBITMAP)::LoadBitmap(hInst,(LPCTSTR)IDB_APP_BOTTOMLEFT);
      SIZE BitmapSizeBottomLeft;

      BitmapSizeBottomLeft.cx = 98;
      BitmapSizeBottomLeft.cy = 157;
      

      hOldBit = (HBITMAP)::SelectObject(m_BitmapDC,hBitmapBottomLeft);



      ::BitBlt(m_hDC,//      pDC,
                        0,
                        m_rUI.bottom - BitmapSizeBottomLeft.cy,
                        BitmapSizeBottomLeft.cx,
                        BitmapSizeBottomLeft.cy,
                        m_BitmapDC,                              
                        0, 0,
                        SRCCOPY);      
      ::DeleteObject((HBITMAP)::SelectObject(m_BitmapDC,hBitmapBottomLeft));

//Bottom Middle
      HBITMAP hBitmapBottomMiddle = (HBITMAP)::LoadBitmap(hInst,(LPCTSTR)IDB_APP_BOTTOMMIDDLE);
      SIZE BitmapSizeBottomMiddle;

      BitmapSizeBottomMiddle.cx = 17;
      BitmapSizeBottomMiddle.cy = 157;
      

      hOldBit = (HBITMAP)::SelectObject(m_BitmapDC,hBitmapBottomMiddle);

      StartX = m_rUI.left + BitmapSizeBottomLeft.cx;
      StartY = m_rUI.bottom - BitmapSizeBottomMiddle.cy;

      nStrWidth =  ((m_rUI.right - BitmapSizeBottomRight.cx) - BitmapSizeBottomMiddle.cx);
      
      ::StretchBlt(      m_hDC,
                              StartX ,
                              StartY,
                              nStrWidth -69,
                              BitmapSizeBottomMiddle.cy,
                              m_BitmapDC,                              
                              0, 0,
                              BitmapSizeBottomMiddle.cx,
                              BitmapSizeBottomMiddle.cy,
                              SRCCOPY);      

      ::DeleteObject((HBITMAP)::SelectObject(m_BitmapDC,hBitmapBottomMiddle));

//right

      HBITMAP hBitmapRight = (HBITMAP)::LoadBitmap(hInst,(LPCTSTR)IDB_APP_RIGHT);
      SIZE BitmapSizeRight;

      BitmapSizeRight.cx = 30;
      BitmapSizeRight.cy = 3;
      

      hOldBit = (HBITMAP)::SelectObject(m_BitmapDC,hBitmapRight);


      StartX = m_rUI.right - BitmapSizeRight.cx;
      StartY = BitmapSizeTopLeft.cy;
      int      nStrHeight = (m_rUI.bottom - BitmapSizeBottomRight.cy) - BitmapSizeTopLeft.cy;
      
      ::StretchBlt(      m_hDC,//      pDC,
                              StartX ,
                              StartY,
                              BitmapSizeRight.cx,
                              nStrHeight,
                              m_BitmapDC,                              
                              0, 0,
                              BitmapSizeRight.cx,
                              BitmapSizeRight.cy,
                              SRCCOPY);      


      ::DeleteObject((HBITMAP)::SelectObject(m_BitmapDC,hBitmapRight));

//left

      HBITMAP hBitmapLeft = (HBITMAP)::LoadBitmap(hInst,(LPCTSTR)IDB_APP_LEFT);
      SIZE BitmapSizeLeft;

      BitmapSizeLeft.cx = 21;
      BitmapSizeLeft.cy = 3;
      

      hOldBit = (HBITMAP)::SelectObject(m_BitmapDC,hBitmapLeft);


      StartX = 0;
      StartY = BitmapSizeTopLeft.cy;
      nStrHeight = (m_rUI.bottom - BitmapSizeBottomRight.cy) - BitmapSizeTopLeft.cy;

      ::StretchBlt(      m_hDC,//      pDC,
                              0 ,
                              StartY,
                              BitmapSizeRight.cx,
                              nStrHeight,
                              m_BitmapDC,                              
                              0, 0,
                              BitmapSizeRight.cx,
                              BitmapSizeRight.cy,
                              SRCCOPY);      
      //Cleanup
      ::DeleteObject((HBITMAP)::SelectObject(m_BitmapDC,hBitmapLeft));



      
      if (m_BitmapDC) {
            ::DeleteDC(m_BitmapDC);
            m_BitmapDC = NULL;
      }

}

void  CApplication::FlipScreen()
{


      ::BitBlt(      m_ParentDC,
                        0,
                        0,
                        m_nAppWidth,
                        m_nAppHeight,
                        m_hDC,                              
                        0, 0,
                        SRCCOPY);
      
}

0
 

Author Comment

by:alsmorris
ID: 10931501
Ok, I figured it out .. this seems to work on 98...

hOldBit = (HBITMAP)::SelectObject(m_BitmapDC,hBitmapTopLeft);

     RECT rDraw;
     rDraw.left = 0;
     rDraw.top =0;
     rDraw.bottom = BitmapSizeTopLeft.cy;
     rDraw.right = BitmapSizeTopLeft.cx;
     
     
     ::BitBlt(     m_hDC,//     pDC,
                    0,
                    0,
                    BitmapSizeTopLeft.cx,
                    BitmapSizeTopLeft.cy,
                    m_BitmapDC,                        
                    0, 0,
                    SRCCOPY);    
     
     /* WORKS ON 98 */

     ::SelectObject(m_BitmapDC,hOldBit);
     ::DeleteObject(hBitmapTopLeft);
0
 

Accepted Solution

by:
modulo earned 0 total points
ID: 10966902
Closed, 500 points refunded.

modulo
Community Support Moderator
Experts Exchange
0

Featured Post

Highfive + Dolby Voice = No More Audio Complaints!

Poor audio quality is one of the top reasons people don’t use video conferencing. Get the crispest, clearest audio powered by Dolby Voice in every meeting. Highfive and Dolby Voice deliver the best video conferencing and audio experience for every meeting and every room.

Join & Write a Comment

In days of old, returning something by value from a function in C++ was necessarily avoided because it would, invariably, involve one or even two copies of the object being created and potentially costly calls to a copy-constructor and destructor. A…
Container Orchestration platforms empower organizations to scale their apps at an exceptional rate. This is the reason numerous innovation-driven companies are moving apps to an appropriated datacenter wide platform that empowers them to scale at a …
The viewer will learn how to clear a vector as well as how to detect empty vectors in C++.
The viewer will be introduced to the member functions push_back and pop_back of the vector class. The video will teach the difference between the two as well as how to use each one along with its functionality.

707 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

12 Experts available now in Live!

Get 1:1 Help Now