CDC :: DrawText多行并旋转

Question

我正在尝试在win32中绘制旋转多行测试。我正在使用带有DT_WORDBREAK的DrawText将文本分解为边界框内的线条，并定义XFORM变换矩阵以在绘制之前操纵世界变换，以便我可以绘制旋转的文本：

/* desiredOrigin - point around which to apply the rotation (rotated text 'topleft' corner)
   textboxSize - desired horizontal textbox size (I'm assuming this should get rotated by drawtext)
   pDC is setup with a font with lfEscapement = 900 (odd that I have to do this, clearly the transform doesn't work like I expected)
*/
void DrawRotatedText(CDC* pDC, CString text, CPoint desiredOrigin, CSize textboxSize, double rotationRads)
{
    XFORM oldTransform;
    pDC->GetWorldTransform(&oldTransform);

    XFORM textTransform = oldTransform;

    float dSin = (float)sin(rotationRads);
    float dCos = (float)cos(rotationRads);

    //setup rotation components from desired angle
    textTransform.eM11 = dCos;
    textTransform.eM12 = dSin;
    textTransform.eM21 = -dSin;
    textTransform.eM22 = dCos;
    //setup translation from desiredtext origin
    textTransform.eDx = (FLOAT)desiredOrigin.x;
    textTransform.eDy = (FLOAT)desiredOrigin.y;

    pDC->SetWorldTransform(&textTransform);

    CRect bounds(CPoint(0, 0), textboxSize);
    pDC->DrawText(text, bounds, DT_TOP | DT_CENTER | DT_WORDBREAK);

    pDC->SetWorldTransform(&oldTransform);
}

这根本不起作用，我不确定是不是因为我做错了什么，或者DrawText不能用于世界变换..

我正在尝试从页面左下角（沿着左边缘）绘制一个90度旋转的文本。我得到的是正确旋转的文字，但靠近页面顶部（离开屏幕）。当我扩展窗口高度时，文本开始围绕x轴移动，并沿y轴保持静止（可见文本确实会发生变化，但应该是在不同文本框宽度处重新绘制的换行符。）

任何人都知道我可能做错了什么？如果需要，我很乐意提供更多细节。