MFC相关图片显示

Posted 2020-06-13

CPaintDC dc(this); 

if (!m_hBitmap) return;
image.Attach(m_hBitmap);
CRect rect;
GetClientRect(&rect);//获得控件所在的矩形区域
int width = rect.Width();
int height = rect.Height();
//......

CDC mDC;
mDC.CreateCompatibleDC(&dc);
CBitmap b;
b.CreateCompatibleBitmap(&dc, width, height);
mDC.SelectObject(&b);
mDC.SetStretchBltMode(HALFTONE);
mDC.FillSolidRect(0, 0, width, height, RGB(212, 208, 200));//设置背景颜色
image.StretchBlt(mDC.m_hDC, marginx, marginy, width-2*marginx, height-2*marginy);
BitBlt(dc.m_hDC, 0, 0, width, height, mDC.m_hDC, 0, 0, SRCCOPY);
mDC.DeleteDC();
::DeleteObject(&b);
m_hBitmap = image.Detach();