void wxMemoryDC::DoSelect( const wxBitmap& bitmap)
{
// select old bitmap out of the device context
if ( m_oldBitmap )
{
::SelectObject(GetHdc(), (HBITMAP) m_oldBitmap);
if ( m_selectedBitmap.Ok() )
{
#ifdef __WXDEBUG__
m_selectedBitmap.SetSelectedInto(NULL);
#endif
m_selectedBitmap = wxNullBitmap;
}
}
// check for whether the bitmap is already selected into a device context
#ifdef __WXDEBUG__
wxASSERT_MSG( !bitmap.GetSelectedInto() ||
(bitmap.GetSelectedInto() == this),
wxT("Bitmap is selected in another wxMemoryDC, delete the first wxMemoryDC or use SelectObject(NULL)") );
#endif
m_selectedBitmap = bitmap;
WXHBITMAP hBmp = m_selectedBitmap.GetHBITMAP();
if ( !hBmp )
return;
#ifdef __WXDEBUG__
m_selectedBitmap.SetSelectedInto(this);
#endif
hBmp = (WXHBITMAP)::SelectObject(GetHdc(), (HBITMAP)hBmp);
if ( !hBmp )
{
wxLogLastError(wxT("SelectObject(memDC, bitmap)"));
wxFAIL_MSG(wxT("Couldn't select a bitmap into wxMemoryDC"));
}
else if ( !m_oldBitmap )
{
m_oldBitmap = hBmp;
}
}
void wxMemoryDCImpl::DoSelect(
const wxBitmap& rBitmap
)
{
//
// Select old bitmap out of the device context
//
if (m_hOldBitmap)
{
::GpiSetBitmap(m_hPS, NULLHANDLE);
if (m_vSelectedBitmap.IsOk())
{
m_vSelectedBitmap.SetSelectedInto(NULL);
m_vSelectedBitmap = wxNullBitmap;
}
}
//
// Check for whether the bitmap is already selected into a device context
//
wxCHECK_RET( !rBitmap.GetSelectedInto() ||
(rBitmap.GetSelectedInto() == GetOwner()),
wxT("Bitmap is selected in another wxMemoryDC, delete the first wxMemoryDC or use SelectObject(NULL)") );
WXHBITMAP hBmp = rBitmap.GetHBITMAP();
if (!hBmp)
{
//
// Bmps drawn to are upside down, so flip it before committing
//
POINTL vPoint[4] = { {0, m_vSelectedBitmap.GetHeight()}
,{m_vSelectedBitmap.GetWidth(), 0}
,{0, 0}
,{m_vSelectedBitmap.GetWidth(), m_vSelectedBitmap.GetHeight()}
};
::GpiBitBlt( m_hPS
,m_hPS
,4
,vPoint
,ROP_SRCCOPY
,BBO_IGNORE
);
m_vSelectedBitmap.SetSelectedInto(NULL);
}
m_vSelectedBitmap = rBitmap;
if (!hBmp)
{
m_hOldBitmap = (WXHBITMAP)::GpiSetBitmap(m_hPS, NULLHANDLE);
return;
}
m_vSelectedBitmap.SetSelectedInto(GetOwner());
m_hOldBitmap = (WXHBITMAP)::GpiSetBitmap(m_hPS, (HBITMAP)hBmp);
if (m_hOldBitmap == HBM_ERROR)
{
wxLogLastError(wxT("SelectObject(memDC, bitmap)"));
wxFAIL_MSG(wxT("Couldn't select a bitmap into wxMemoryDC"));
}
} // end of wxMemoryDC::SelectObject