C++ windows位图绘制文本

Question

如何在图像上绘制文本（使用设置字体和大小）并将其保存为JPEG？

例如

CBitmap bitmap; 
    bitmap.CreateBitmap(width, height, 1, 32, rgbData); 

这里我想提请位图一些文字：

CImage image; 
    image.Attach(bitmap); 

    image.Save(_T("C:\\test.bmp"), Gdiplus::ImageFormatJPEG); 

Answer 1

CBitmap bitmap; 
CBitmap *pOldBmp; 
CDC MemDC; 

CDC *pDC = GetDC(); 
MemDC.CreateCompatibleDC(pDC); 
bitmap.CreateCompatibleBitmap(pDC, width, height); 

pOldBmp = MemDC.SelectObject(&MyBmp); 

CBrush brush; 
brush.CreateSolidBrush(RGB(255,0,0)); 

CRect rect; 
rect.SetRect (0,0,40,40); 
MemDC.SelectObject(&brush); 

MemDC.DrawText("Hello",6, &rect, DT_CENTER); 
MemDC.SetTextColor(RGB(0,0,255)); 
GetDC()->BitBlt(0, 0, 50, 50, &MemDC, 0, 0, SRCCOPY); 

//When done, than: 
MemDC.SelectObject(pOldBmp); 
ReleaseDC(&MemDC); 
ReleaseDC(pDC); 

bitmap.Save(_T("C:\\test.bmp"), Gdiplus::ImageFormatJPEG); 

试试这个代码片段