Win7和XP中不同大小的TrueType符号

Question

我用CreateFontIndirect（）和GetTextMetrics（）创建了新字体，返回不同宽度的符号。例如：

获取DC：

HDC ReferenceDC = GetDC( NULL );
SetMapMode( ReferenceDC, MM_HIMETRIC );

m_nFontHeight_HM = font.lfHeight * INCH_IN_HIMETRIC / 72 / MILLIMETER_IN_HIMETRIC;

可变字体已保存字体参数：

LOGFONT lf = font;
lf.lfHeight = -m_nFontHeight_HM;

创建并选择字体：

guards::tlGDIGuard< HFONT > fontGuard( ReferenceDC, CreateFontIndirect( &lf ) );

if ( !fontGuard.GetObject() )
{
    throw system_exception_ex( exceptions::EXCEPTION_TYPE_NT );
}

获取Textmetric： （已经有不同的XP和Win 7）

TEXTMETRIC TextMetric;

GetTextMetrics( ReferenceDC, &TextMetric );

m_nFontHeight_HM = -lf.lfHeight;


OUTLINETEXTMETRIC TextMetrics;

if ( !GetOutlineTextMetrics( ReferenceDC, sizeof( TextMetrics ), &TextMetrics ) )
{
    throw system_exception_ex( exceptions::EXCEPTION_TYPE_NT );
}

const unsigned int nFirstChar = TextMetrics.otmTextMetrics.tmFirstChar;
const unsigned int nLastChar = TextMetrics.otmTextMetrics.tmLastChar;
const unsigned int nCharsCount = nLastChar - nFirstChar + 1;

获取字符宽度：

boost::scoped_array< ABC > pCharWidths( new ABC[ nCharsCount ] );

if ( !GetCharABCWidths( ReferenceDC, nFirstChar, nLastChar, pCharWidths.get() ) )
{
    throw system_exception_ex( exceptions::EXCEPTION_TYPE_NT );
}

m_CharactersWidthsArray.resize( nLastChar + 1, 0 );

long WideCharCount = 0;
m_nTabWhidth = 0;

for ( unsigned int nChar = nFirstChar; nChar <= nLastChar; ++nChar )
{
    const int nCharWidth =   pCharWidths[ nChar - nFirstChar ].abcA + pCharWidths[ nChar - nFirstChar ].abcB + pCharWidths[ nChar - nFirstChar ].abcC;

    m_CharactersWidthsArray[ nChar ] = nCharWidth;

    if ( nCharWidth )
    {
        m_nTabWhidth += nCharWidth;
        WideCharCount++;
    }

}