DrawText : Output letters overlaps

[khaldoun KASSEM]

Hi

I try to draw a text using gdi function DrawText, the letters overlaps when the size of the font is too small (3 points)?

//FONT
CFont font;
LOGFONT lgFont;
memset(&lgFont, 0, sizeof(LOGFONT));
lgFont.lfCharSet = DEFAULT_CHARSET;
lgFont.lfClipPrecision = CLIP_DEFAULT_PRECIS;
lgFont.lfItalic = fontStyle & FontStyleItalic;//IsItalic(m_strFontStyle);
lgFont.lfOrientation = 0;
lgFont.lfStrikeOut = FALSE;
lgFont.lfUnderline = FALSE;
lgFont.lfOutPrecision = OUT_SCREEN_OUTLINE_PRECIS;
lgFont.lfQuality = ANTIALIASED_QUALITY | PROOF_QUALITY;

strcpy(lgFont.lfFaceName ,m_strFont);
lgFont.lfHeight = -fFontSize;//MulDiv(fFontSize, pDC->GetDeviceCaps(LOGPIXELSY), 96);
lgFont.lfWeight = (fontStyle & FontStyleBold)?FW_BOLD:FW_REGULAR;//GetBoldWeightNew(m_strFontStyle);
lgFont.lfEscapement = 0;

font.CreateFontIndirect(&lgFont);

{
	int nBkMode = emfDC.SetBkMode(TRANSPARENT);
	int nGraphicMode = emfDC.SetGraphicsMode(GM_ADVANCED);
	int nMapMode = emfDC.SetMapMode( MM_TEXT);
	CFont* pOldFont = emfDC.SelectObject(&font);
	emfDC.DrawTextEx(sText,rcDest,uFormat,NULL);

	rcDest.OffsetRect(0,-nY);

	emfDC.SetTextColor(oldColor);

	emfDC.SelectObject(pOldFont);

	nGraphicMode = emfDC.SetGraphicsMode(nGraphicMode);
	nMapMode = emfDC.SetMapMode( nMapMode);
	nBkMode = emfDC.SetBkMode(nBkMode);


}

I attached a jpeg showing the output.

thank you

[khaldoun KASSEM]

After doing some tests the problem is due to the length of the string being rendered and the size of the font;
I repalced the DrawText with a TextOut and I get the same behaviour?
Any Idea

[miteshpandey]

If you are using the above code from other place other than OnPaint or OnDraw you have to first erase the previous background and then apply fresh drawing or text output. If you don't paint the background you'll see some garbage.

When OnPaint is called it previously calls another function (possibly OnEraseBkground) and thus the background is erased and then new drawing takes place in OnPaint handler. Same goes for OnDraw.

The advice: Do your drawings in the above mentioned functions.

EDIT: After re-reading the post I am not sure if what I have stated is your problem or not.

[khaldoun KASSEM]

the problem is not in erasing background or not, its really in renderring text, I have it when printing my text...

[miteshpandey]

Maybe the problem is due to this specific font (face name) that you are using. Try using other fonts (face names)

[miteshpandey]

Another thing I had in mind is:

What are u using for lfPitchAndFamily

May be FIXED_PITCH is causing all this which maybe the default (not sure) if you have not assigned the lfPitchAndFamily

[khaldoun KASSEM]

Thank you,

Maybe the problem is due to this specific font (face name) that you are using. Try using other fonts (face names)

I tried many font face, I have the same problem;

What are u using for lfPitchAndFamily

after your comment, I tested all possibilities, the output is the same

Its very strange I just have it when the font size is very small (2,3,4)points

[khaldoun KASSEM]

An exemple wich reproduce the behaviour of the DrawText function...

EDIT
Finaly the problem is in the DrawText Function, because the TextOut is working...

Thank you

[khaldoun KASSEM]

Hi
No solution for the moment

I am trying to use GetCharWidth to get char widths and ExttextOut to render the text. (Exemple found on the web from Feng Yuang).

when using the GetCharWidth(hDC,0,255,nCharWidth) we get just for 256 chars, what can i do to get unicode or multibyte chars widths?

thank you