void wxEnhMetaFileDCImpl::Create(HDC hdcRef,
const wxString& filename,
int width, int height,
const wxString& description)
{
m_width = width;
m_height = height;
RECT rect;
RECT *pRect;
if ( width && height )
{
rect.top =
rect.left = 0;
rect.right = width;
rect.bottom = height;
// CreateEnhMetaFile() wants them in HIMETRIC
PixelToHIMETRIC(&rect.right, &rect.bottom, hdcRef);
pRect = ▭
}
else
{
// GDI will try to find out the size for us (not recommended)
pRect = (LPRECT)NULL;
}
m_hDC = (WXHDC)::CreateEnhMetaFile(hdcRef, GetMetaFileName(filename),
pRect, description.wx_str());
if ( !m_hDC )
{
wxLogLastError(wxT("CreateEnhMetaFile"));
}
}
bool wxMetafileDataObject::GetDataHere(void *buf) const
{
METAFILEPICT *mfpict = (METAFILEPICT *)buf;
const wxMetafile& mf = GetMetafile();
wxCHECK_MSG( mf.GetHMETAFILE(), false, wxT("copying invalid metafile") );
// doesn't seem to work with any other mapping mode...
mfpict->mm = MM_ANISOTROPIC; //mf.GetWindowsMappingMode();
mfpict->xExt = mf.GetWidth();
mfpict->yExt = mf.GetHeight();
// transform the picture size to HIMETRIC units (0.01mm) - as we don't know
// what DC the picture will be rendered to, use the default display one
PixelToHIMETRIC(&mfpict->xExt, &mfpict->yExt);
mfpict->hMF = CopyMetaFile((HMETAFILE)mf.GetHMETAFILE(), NULL);
return true;
}
void PixelToHIMETRIC(LONG *x, LONG *y)
{
PixelToHIMETRIC(x, y, ScreenHDC());
}
bool wxEnhMetaFileDataObject::GetDataHere(const wxDataFormat& format, void *buf) const
{
wxCHECK_MSG( m_metafile.Ok(), false, _T("copying invalid enh metafile") );
HENHMETAFILE hEMF = (HENHMETAFILE)m_metafile.GetHENHMETAFILE();
if ( format == wxDF_ENHMETAFILE )
{
HENHMETAFILE hEMFCopy = ::CopyEnhMetaFile(hEMF, NULL);
if ( !hEMFCopy )
{
wxLogLastError(_T("CopyEnhMetaFile"));
return false;
}
*(HENHMETAFILE *)buf = hEMFCopy;
}
else
{
wxASSERT_MSG( format == wxDF_METAFILE, _T("unsupported format") );
// convert to WMF
ScreenHDC hdc;
// first get the buffer size and alloc memory
size_t size = ::GetWinMetaFileBits(hEMF, 0, NULL, MM_ANISOTROPIC, hdc);
wxCHECK_MSG( size, false, _T("GetWinMetaFileBits() failed") );
BYTE *bits = (BYTE *)malloc(size);
// then get the enh metafile bits
if ( !::GetWinMetaFileBits(hEMF, size, bits, MM_ANISOTROPIC, hdc) )
{
wxLogLastError(_T("GetWinMetaFileBits"));
free(bits);
return false;
}
// and finally convert them to the WMF
HMETAFILE hMF = ::SetMetaFileBitsEx(size, bits);
free(bits);
if ( !hMF )
{
wxLogLastError(_T("SetMetaFileBitsEx"));
return false;
}
METAFILEPICT *mfpict = (METAFILEPICT *)buf;
wxSize sizeMF = m_metafile.GetSize();
mfpict->hMF = hMF;
mfpict->mm = MM_ANISOTROPIC;
mfpict->xExt = sizeMF.x;
mfpict->yExt = sizeMF.y;
PixelToHIMETRIC(&mfpict->xExt, &mfpict->yExt);
}
return true;
}
