C / C++ / MFC

EliottA wrote:

So you include the variable name in the function definition?

Chris Losinger wrote:

but it's really handy to people who want to use the function.

void f(int, int, double, double, int, int& );
void f(int a, int b, double aa, double bb, int g, int& r){}

EliottA wrote:

& int x;
int & x;
int &x;

void FuncRef(int &n)
{
	n = 0;
}

void FuncNormal(int n)
{
	n = 4;
}

void _tmain(int argc, _TCHAR* argv[])
{
	int i = 10;
	int &Ref = i; //Ref now refers to the variable i. If you change the value of Ref, i will change as well (and vice versa).
        //int &Ref2; //This line, if enabled, won't compile. Because Ref2 is not initialised properly.
	cout<<Ref<<endl; //Will display 10. Because Ref is a reference to i.
	Ref = 2;
	cout<<i<<endl; //Will display 2. Because Ref was changed to 2, but Ref itself is referring to i.
	FuncRef(i);
	cout<<i<<endl; //Will display 0. Because the function takes the parameter as a reference and has modified it!
	FuncNormal(i);
	cout<<i<<endl; //Will still display 0. Because FuncNormal does not take the parameter as reference.
	
}

kumar sanghvi wrote:

...how can i increase the rect size...

CString s = L"मैं हिन्दी नहीं बोल सकता हूँ।";
CRect rc;
DrawText (s, &rc, DT_CALCRECT);

Gdiplus::Bitmap *pBitmap = NULL;
Gdiplus::Graphics *pGraphics = NULL;
Gdiplus::Pen penRed(Gdiplus::Color(255, 255, 0, 0));
Gdiplus::Font gdiFont(_T("Tahoma"), 80, 0, Gdiplus::UnitPixel);
CString text = _T("मैं हिन्दी नहीं बोल सकता हूँ।");
LOGFONTW logFontW;
Status status;
CRect rectBondary1(50, 50, 1000, 1000);
CRect rectBondary2(50, 50, 1000, 1000);

pBitmap = new Gdiplus::Bitmap(1024, 1024, PixelFormat32bppARGB);
pBitmap->SetResolution(96.0F, 96.0F);

pGraphics = Graphics::FromImage(pBitmap);

pGraphics->Clear(Gdiplus::Color(255, 0, 0, 0));

status = gdiFont.GetLogFontW(pGraphics, &logFontW);

HFONT hFont = ::CreateFontIndirect((LOGFONTW *)&logFontW);

HDC hDC = pGraphics->GetHDC();

HGDIOBJ hOldObject = SelectObject(hDC, hFont);

int result = DrawText(hDC, text, -1, rectBondary1, DT_CALCRECT);

result = DrawText(hDC, text, -1, rectBondary2, 0);

SelectObject(hDC, hOldObject);

DeleteObject(hFont);

pGraphics->ReleaseHDC(hDC);

pGraphics->DrawRectangle(&penRed, rectBondary1.left, rectBondary1.top, rectBondary1.Width(), rectBondary1.Height());

CLSID pngClsid;
GetEncoderClsid(_T("image/png"), &pngClsid);
pBitmap->Save(_T("test.png"), &pngClsid, NULL);

if (pGraphics)
    delete pGraphics;

if (pBitmap)
    delete pBitmap;

int CTextRenderAnalyzeDialog::GetEncoderClsid(const WCHAR *pFormat, CLSID *pClsid)
{
	UINT uiNumber = 0;
	UINT uiSize = 0;

	ImageCodecInfo *pImageCodecInfo = NULL;

	GetImageEncodersSize(&uiNumber, &uiSize);
	if(uiSize == 0)
	{
		return -1;
	}
	pImageCodecInfo = (ImageCodecInfo *)(malloc(uiSize));
	if (pImageCodecInfo == NULL)
	{
		return -1;
	}
	GetImageEncoders(uiNumber, uiSize, pImageCodecInfo);
	for (UINT uiIndex = 0; uiIndex < uiNumber; ++uiIndex)
	{
		if (wcscmp(pImageCodecInfo[uiIndex].MimeType, pFormat) == 0)
		{
			*pClsid = pImageCodecInfo[uiIndex].Clsid;
			free(pImageCodecInfo);
			return uiIndex;
		}
	}
	free(pImageCodecInfo);
	return -1;
}