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我试图在不使用 GDI api 的情况下计算直接写入中 unicode 字符的宽度。我的问题是一些字符是全角字符，有些是半角字符，因此下面的公式不起作用，因为左侧轴承和右侧轴承因差异字符而异. 我该如何解决这个问题？

const size_t cSize = strlen((const char *)&globals->def_font.name[1]) + 1;
        wchar_t* fontFamily = new wchar_t[cSize];
        mbstowcs(fontFamily, (const char *)&globals->def_font.name[1], cSize);

        const size_t size = strlen((const char *)data) + 1;
        wchar_t* textData = new wchar_t[size];
        mbstowcs(textData, (const char *)data, size);

        IDWriteFontFace* fontName = GetFontFaceName(fontFamily);
        IDWriteFontFace1* fontName1 = static_cast <IDWriteFontFace1*> (fontName);
        //UINT32 textLength = fontName1->GetGlyphCount();
        UINT32 textLength = (UINT32)wcslen(textData);



        UINT32* pCodePoints = new UINT32[textLength];
        ZeroMemory(pCodePoints, sizeof(UINT32)* textLength);

        UINT16* pGlyphIndices = new UINT16[textLength];
        ZeroMemory(pGlyphIndices, sizeof(UINT16)* textLength);
        for (unsigned int i = 0; i < textLength; ++i)
        {
            pCodePoints[i] = textData[i];
        }

        // Get text length

        HRESULT hr = fontName1->GetGlyphIndices(
            pCodePoints,
            textLength,
            pGlyphIndices
            );
        if (FAILED(hr))
        {
            MessageBox(NULL, L"Get glyph indices failed!", L"Error", 0);
            return 1;
        }

        // Create path geometry
        hr = direct2DFactory->CreatePathGeometry(&pathGeometry);
        if (FAILED(hr))
        {
            MessageBox(NULL, L"Create path geometry failed!", L"Error", 0);
            return 1;
        }

        // Open sink
        hr = pathGeometry->Open(&pGeometrySink);
        if (FAILED(hr))
        {
            MessageBox(NULL, L"Open geometry sink failed!", L"Error", 0);
            return 1;
        }

        float fontSize_ = textFormat->GetFontSize();
        // Get glyph run outline
        hr = fontName->GetGlyphRunOutline(
            fontSize_,              // font size
            pGlyphIndices,
            NULL,
            NULL,
            textLength,
            FALSE,
            FALSE,
            pGeometrySink
            );
        if (FAILED(hr))
        {
            MessageBox(NULL, L"Get glyph run outline failed!", L"Error", 0);
            return 1;
        }
        D2D1_MATRIX_3X2_F   matrix_;
        hdc->GetTransform(&matrix_);


        direct2DFactory->CreateTransformedGeometry(
            pathGeometry,
            matrix_,
            &pTransformedGeometry
            );

        // Close sink
        D2D1_RECT_F rect;

        pTransformedGeometry->GetBounds(matrix_, &rect);
        pGeometrySink->Close();

        DWRITE_GLYPH_METRICS* glyphmetrics = new DWRITE_GLYPH_METRICS[textLength];
        fontName1->GetDesignGlyphMetrics(pGlyphIndices, textLength, glyphmetrics);
        fontName1->GetMetrics(&fontMetrics);
        float boundingBox = fontMetrics.glyphBoxRight - fontMetrics.glyphBoxLeft;
        //Actual point calculation
        // fontSize = textFormat->GetFontSize();
        float fontHeight = ((fontMetrics.ascent + fontMetrics.descent )* fontSize_) / (fontMetrics.designUnitsPerEm); 

        index = *data;
        n_widths[index] = (((glyphmetrics->advanceWidth + glyphmetrics->leftSideBearing + glyphmetrics->rightSideBearing) * fontSize_) / (fontMetrics.designUnitsPerEm)) ;
        n_widths[index] = n_widths[index]* 1.33;**

        //Release the glyphmetrics
        delete[]glyphmetrics;
        //delete[]pCodePoints;
        delete[]pGlyphIndices;
        //delete[]fontFamily;
        delete[]textData;
        glyphmetrics = NULL;

        textLayout->GetMetrics(&textMetrics);
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