Gdiplus::Graphics::DrawString throw the error code "InvalidParameter(2)" on some Computer(window xp) why?

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Gdiplus::Graphics::DrawString throw the error code "InvalidParameter(2)" on some Computer(window xp) why?

hi,everyone

My program run on most of the computer(window xp).
but someone tell me that my progrom run on his computer can't see the text,i try to get the error code, i get the code 2(InvalidParameter),but my Parameter shall be right,Because it work well on most of the computer(window xp).

when i run my demo on his computer, i can see one line.

the key code.

C++

LRESULT CMainDlg::OnPaint(UINT /*uMsg*/, WPARAM /*wParam*/, LPARAM /*lParam*/, BOOL& /*bHandled*/)
{
	CPaintDC _dc(m_hWnd);
	RECT rc;
	GetClientRect(&rc);
	CMemoryDC _memdc(_dc,rc);
	_memdc.FillSolidRect(&rc,RGB(255,255,255));

	RECT rcText={20,20,200,40};
	std::wstring sTest=_T("this draw by DrawText!");
	_memdc.DrawText(sTest.c_str(),sTest.length(),&rcText,DT_LEFT|DT_SINGLELINE|DT_VCENTER);

	RectF gRect(20,40,200,60);
	sTest=_T("this draw by GDI+ and 255!");
	Gdiplus::Graphics grap(_memdc);
	Gdiplus::SolidBrush SolidBrush2(Color(255,51,51,51));
	Gdiplus::FontFamily fontFamily(_T("宋体"));
	Gdiplus::Font font(&fontFamily,12,Gdiplus::FontStyleRegular,Gdiplus::UnitPixel);
	grap.SetSmoothingMode( SmoothingModeHighSpeed );
	StringFormat _strformat;
	_strformat.SetTrimming(StringTrimmingEllipsisWord); 
	_strformat.SetLineAlignment(StringAlignmentCenter);
	Status sNext = grap.DrawString(sTest.c_str(),sTest.length(),&font,gRect,&_strformat,&SolidBrush2);
        //i get the error code here,sNext=2;
	if(sNext!=S_OK)
		Save(sNext);

	RectF gRect2(20,60,200,80);
	sTest=_T("this draw by GDI+ and 254!");
	SolidBrush2.SetColor(Color(120,255,0,0));
	Status sNext2 = grap.DrawString(sTest.c_str(),sTest.length(),&font,gRect2,&_strformat,&SolidBrush2);

       //i get the error code here too,sNex2t=2;
	if(sNext2!=S_OK)
		Save(sNext2);
	return TRUE;
}

Posted 5-Nov-12 21:41pm

lin98666521

Updated 6-Nov-12 2:31am

v2

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Comments

Richard MacCutchan 6-Nov-12 5:20am

Which line of code gives the error?

lin98666521 6-Nov-12 8:32am

sNext and sNext2,they all Equal to 2.

Jochen Arndt 6-Nov-12 6:33am

It's hard to guess what is wrong.

To check for errors, add GetLastStatus() calls after constructing objects. My first choice would be calling fontFamily.GetLastStatus() because the family used in your code may be not present on all systems.

lin98666521 6-Nov-12 8:39am

i think that the fontFamily maybe wrong,but i think This is a small possibility.The Function DrawText work well,it also use the fontfamily "宋体" in my code.

Jochen Arndt 6-Nov-12 8:49am

DrawText() does not use the FontFamily object. It uses the device context's selected font.

The invalid parameter error indicates that one of the DrawString() parameters is invalid. So just check them all by using GetLastStatus():
Gdiplus::FontFamily fontFamily(_T("宋体"));
if (fontFamily.GetLastStatus())
// error
and also for Font and StringFormat.

lin98666521 6-Nov-12 9:02am

thanks
i will try . It is now ten p.m. in my country,Tomorrow I will try to check them on that computer.

lin98666521 7-Nov-12 0:17am

hi,i do that as what you tell me.
you are right, fontFamily.GetLastStatus() is wrong,i make a program to test,
they all get error,such as fontFamily(_T("宋体")); fontFamily(_T("Arial"));
fontFamily(_T("微软雅黑"));.

do you have other way to make sure fontfamily to be right？

lin98666521 7-Nov-12 0:31am

FontFamilyNotFound = 14
i get the error code is 14(FontFamilyNotFound);

Jochen Arndt 7-Nov-12 3:08am

The error message is clear. You noted that the error occurs on one system only. So there must be something wrong with the fonts on that system.

An alternative may be the usage of a generic typeface:
font(Gdiplus::FontFamily::GeneriySansSerif(),12,Gdiplus::FontStyleRegular,Gdiplus::UnitPixel);
A good option is a fallback to a generic face when constructing the font family fails:
font(fontFamily.GetLastStatus() ? Gdiplus::FontFamily::GeneriySansSerif() : &fontFamily, 12);

One more note:
The construction parameter is a WCHAR string. You should use:
FontFamily fonfFamily(L"Arial");
With Unicode builds using the _T() macro does not care but should be avoided where a wide string must be passed.

lin98666521 7-Nov-12 7:53am

thanks,I knew very little about the gdiplus and I did not take effective measures to the Specific system. i think is my mistake.
Tomorrow I will try to use "Gdiplus::FontFamily::GeneriySansSerif()"
i hope it can work well.

lin98666521 7-Nov-12 21:50pm

hi,i try to use Gdiplus::FontFamily::GenericSansSerif(),when the text is english it work well and if the text is Chinese,it look like "□□□□□□□□". i think that the font do not Support Chinese. do you have another way to Other methods to solve the problem.

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Jochen Arndt · Accepted Answer · 2012-11-07T02:53:00

Using comments the problem has been clarified and I will give a summary here as solution.

The Invalid Parameter error code 2 indicates that one or more of the DrawString() parameters are invalid. So they must be checked. Many GDI+ plus objects are constructed with parameters. Because constructors does not return a value and no exceptions are thrown, GDI+ plus provides GetLastStatus() member functions that can be used after construction to check for success. So the code can be updated with error checking:

Gdiplus::SolidBrush SolidBrush2(Color(255,51,51,51));
Status st = SolidBrush2.GetLastStatus();
if (Gdiplus::Ok == st)
{
    Gdiplus::FontFamily fontFamily(L"宋体");
    st = fontFamily.GetLastStatus();
    if (Gdiplus::Ok == st)
    {
        Gdiplus::Font font(&fontFamily,12,
            Gdiplus::FontStyleRegular,Gdiplus::UnitPixel);
        st = font.GetLastStatus();
        if (Gdiplus::Ok == st)
        {
            grap.SetSmoothingMode( SmoothingModeHighSpeed );
            StringFormat _strformat;
            _strformat.SetTrimming(StringTrimmingEllipsisWord); 
            _strformat.SetLineAlignment(StringAlignmentCenter);
            st = grap.DrawString(sTest.c_str(),sTest.length(),&font,gRect,
                &_strformat,&SolidBrush2);
        }
    }
}
if (Gdiplus::Ok != st)
{
    // Insert error handling/message here
}

A potential error candidate is the FontFamily construction. The specified family may be not present on all systems. To avoid errors on such systems, a fallback using a generic type face may be used:

C++

Gdiplus::FontFamily fontFamily(L"宋体");
// If construction of font family fails fall back to a generic face.
// Provided are GenericMonoSpace, GenericSansSerif, and GenericSerif.
Gdiplus::Font font(Gdiplus::Ok == fontFamily.GetLastStatus() ?
    &fontFamily : Gdiplus::FontFamily::GenericSansSerif(),
    12,Gdiplus::FontStyleRegular,Gdiplus::UnitPixel);