c++ - HBITMAP 内存泄漏

Question

无论我多么努力地寻找和尝试，我都找不到这段代码泄漏的原因。实际上，我不确定泄漏，但每次使用这段代码时 GDI 对象的数量都会增加。

HBITMAP hBmp;
hBmp = CreateDIBitmap(dc, &stBmpIH, CBM_INIT, m_pBitmapData, m_pBitmapInfo, DIB_RGB_COLORS) ;

Bitmap  *pBMP = NULL;
HPALETTE hPal = NULL;
Color col = 0;

pBMP = Bitmap::FromHBITMAP(hBmp, hPal);

if (m_bFlip)
{
    pBMP->RotateFlip( Rotate90FlipXY );
    pBMP->GetHBITMAP(col,&hBmp);
    m_bFlip = FALSE;
}
else
{
    pBMP->RotateFlip( RotateNoneFlipX );
    pBMP->GetHBITMAP(col,&hBmp);
}

delete pBMP;

我用工具检查了 GDI 对象，发现 HBITMAP hBmp 是泄漏的对象。我应该如何删除它？

DeleteObject 无效。

谢谢

Answer 1

来自FromHBITMAP documentation :

You are responsible for deleting the GDI bitmap and the GDI palette. However, you should not delete the GDI bitmap or the GDI palette until after the GDI+ Bitmap object is deleted or goes out of scope.

仅仅删除Bitmap对象是不够的，之后还需要在hBmp上调用DeleteObject。