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我用下面的代碼創建一個IDWriteTextLayout對象,如何在DirectWrite中獲取斜體字體的正確文字寬度?
hr = g_pDWriteFactory->CreateTextLayout(text, textLength, *g_pTextFormat, 200000000, 200000000, g_pTextLayout);
然後得到通過文本的度量文本寬度,
DWRITE_TEXT_METRICS dtm;
pTextLayout->GetMetrics(&dtm);
float minHeight = dtm.height;
float minWidth = dtm.widthIncludingTrailingWhitespace;
什麼讓我困惑的是,字體的風格是否DWRITE_FONT_STYLE_OBLIQUE或DWRITE_FONT_STYLE_NORMAL ,同一個字符串的寬度是相同的值。爲什麼?我期望當字體樣式是DWRITE_FONT_STYLE_OBLIQUE時,寬度應該更大。我怎樣才能得到斜文的正確寬度?
謝謝。