If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register or Login before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below. I'm currently using CreateFont() to create fonts for my application. In the front-end, my application works with Twips which at SOME point needs to be converted to work with CreateFont(). The first parameter of CreateFont() is the height of the font in "logical units" which I have no idea about. Does this mean pixels? What algorithm or function can I use to convert twips to the units required by CreateFont()? Thanks.
Currently I'm using:
MulDiv( twips, GetDeviceCaps( m_mdc, LOGPIXELSY ), 1440 );
Which doesn't seem to work. The font is smaller than the size I expect.

//===================================================================================================
s32 FontData::TwipsToPixels( s32 twips )
	return MulDiv( twips, GetDeviceCaps( m_mdc, LOGPIXELSY ), 1440 );
//===================================================================================================
void FontData::ChangeSingleFont( HFONT& font, s32 size_in_twips, const std::wstring& typefaceName )
	font = CreateFontW(
		TwipsToPixels( size_in_twips ),		// Font Height
		0,									// Font Width (0 = auto)
		0,									// Escapement
		0,									// Orientation
		FW_BOLD,							// Weight
		FALSE,								// Italic
		FALSE,								// Underline
		FALSE,								// Strike-Out
		ANSI_CHARSET,						// Character Set
		OUT_DEFAULT_PRECIS,					// Output Precision
		CLIP_DEFAULT_PRECIS,				// Clip Precision
		DEFAULT_QUALITY,					// Quality
		DEFAULT_PITCH | FF_DONTCARE,		// Pitch & Family
		typefaceName.c_str()				// Face (font type)
	meassert( font );
					On second thought, it's not working like I expected. Perhaps I'm doing something else wrong?

I pass in 100 as the first parameter to CreateFontW() after setting to MM_TWIPS, however the text is EXTREMELY huge! It shouldn't be that big. Any idea what's going on? here's my code:

	
Code:
	
	int previousMapMode = SetMapMode( m_mdc, MM_TWIPS );
	font = CreateFontW(
		size_in_twips,						// Font Height
		0,									// Font Width (0 = auto)
		0,									// Escapement
		0,									// Orientation
		FW_NORMAL,							// Weight
		FALSE,								// Italic
		FALSE,								// Underline
		FALSE,								// Strike-Out
		DEFAULT_CHARSET,					// Character Set
		OUT_DEFAULT_PRECIS,					// Output Precision
		CLIP_DEFAULT_PRECIS,				// Clip Precision
		DEFAULT_QUALITY,					// Quality
		DEFAULT_PITCH | FF_DONTCARE,		// Pitch & Family
		typefaceName.c_str()				// Face (font type)
	meassert( font );
	SetMapMode( m_mdc, previousMapMode );
If there's anything else you need to see, just let me know. Thanks.
	
    HFONT HFont, previousHFont;
    int previousMapMode = SetMapMode(hdc, MM_TWIPS);
    SelectObject(hdc, GetStockObject(BLACK_PEN));
    HFont = CreateFont(
       300,	// Font Height
       0,	// Font Width (0 = auto)
       0,	// Escapement
       0,	// Orientation
       FW_NORMAL,	// Weight
       FALSE,	// Italic
       FALSE,	// Underline
       FALSE, // Strike-Out
       DEFAULT_CHARSET, // Character Set
       OUT_DEFAULT_PRECIS, // Output Precision
       CLIP_DEFAULT_PRECIS, // Clip Precision
       DEFAULT_QUALITY, // Quality
       DEFAULT_PITCH | FF_DONTCARE, // Pitch & Family
       "Verdana" // Face (font type)
    previousHFont = (HFONT) SelectObject(hdc, HFont);
    TextOut(hdc, 400, 10, "Test", 4);
    SelectObject(hdc, previousHFont);
    DeleteObject(HFont);
    SetMapMode(hdc, previousMapMode);
The size of the characters with a MM_TWIPS and a height of 300 is about the same as the size I get with MM_TEXT and a height of 15.
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