自己封装的CDrawBitmap类（用于画bmp图片）

最新推荐文章于 2023-09-22 11:10:43 发布

jacky_qiu

最新推荐文章于 2023-09-22 11:10:43 发布

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自己封装的CDrawBitmap类（用于画bmp图片）

/****************************************************************************
CDrawBitmap封装了一些画图片的函数。

调用如下：
CDrawBitmap g_bmp1("D://My Documents//My Pictures//风景图片//4244123431.bmp");
g_bmp1.Draw(m_hWnd);

CDrawBitmap g_bmp2("D://My Documents//My Pictures//风景图片//plane.bmp");
g_bmp2.DrawTransparent(m_hWnd);

CDrawBitmap g_bmp3("D://My Documents//My Pictures//风景图片//jzg2.bmp");
g_bmp3.DrawTransparent(m_hWnd);

****************************************************************************/

//使用TransparentBlt需要添加 #pragma comment(lib,"msimg32.lib")
#pragma comment(lib,"msimg32.lib")

class CDrawBitmap
{
private:
HBITMAP m_bitmap;
int m_bitmap_cx;
int m_bitmap_cy;
public:
CDrawBitmap() {}
CDrawBitmap(TCHAR * PicturePath) { LoadPicture(PicturePath); }
CDrawBitmap(WORD ResourceID) { LoadResource(ResourceID); }

~CDrawBitmap() { ::DeleteObject(m_bitmap);}

bool LoadPicture(TCHAR * PicturePath)
{
  m_bitmap=(HBITMAP)LoadImage(NULL,  //应用程序实例
   PicturePath,     //路径
   IMAGE_BITMAP,
   0,        //如果不置0,则此参数指定m_bitmap的宽(位图被拉伸)
   0,        //如果不置0,则此参数指定m_bitmap的高(位图被拉伸)
   LR_LOADFROMFILE|LR_CREATEDIBSECTION|LR_DEFAULTSIZE);

  if (!m_bitmap)
   return false;

  BITMAP bmp;
        GetObject(m_bitmap,sizeof(BITMAP),(LPSTR)&bmp);
  m_bitmap_cx=bmp.bmWidth;
  m_bitmap_cy=bmp.bmHeight;

return true;
}

bool LoadResource(WORD ResourceID)
{
m_bitmap=LoadBitmap(GetModuleHandle(NULL),MAKEINTRESOURCE (ResourceID) );

if (!m_bitmap)
return false;

  BITMAP bmp;
        GetObject(m_bitmap,sizeof(BITMAP),(LPSTR)&bmp);
  m_bitmap_cx=bmp.bmWidth;
  m_bitmap_cy=bmp.bmHeight;

return true;
}

void Draw(HWND hWnd=NULL,int x=0,int y=0,int width=100,int height=100)
{
  HDC hScrDC=GetDC(hWnd);        //创建屏幕DC
  Draw(hScrDC,x,y,width,height);
  ::ReleaseDC(hWnd,hScrDC) ;       //释放屏幕DC
}

void Draw(HDC hScrDC,int x=0,int y=0,int width=100,int height=100)
{
  HDC hMemDC=CreateCompatibleDC(hScrDC);    //创建内存DC
  ::SelectObject(hMemDC,m_bitmap);      //把位图选进内存DC
  BitBlt(hScrDC,x,y,width,height,hMemDC,0,0,SRCCOPY); //内存DC映射到屏幕DC
  ::DeleteDC(hMemDC) ;        //删除内存DC
}

void DrawTransparent(HWND hWnd=NULL,int x=0,int y=0)
{
  HDC hScrDC=GetDC(hWnd);        //创建屏幕DC
  DrawTransparent(hScrDC,x,y);
  ::ReleaseDC(hWnd,hScrDC) ;       //释放屏幕DC
}

//不进行拉伸处理，如需要，请自行修改代码TransparentBlt中的参数
//使用TransparentBlt需要添加 #pragma comment(lib,"msimg32.lib")
void DrawTransparent(HDC hScrDC,int x=0,int y=0,UINT crTransparent=RGB(255,255,255))
{
  HDC hMemDC=CreateCompatibleDC(hScrDC);    //创建内存DC
  ::SelectObject(hMemDC,m_bitmap);      //把位图选进内存DC
  ::TransparentBlt(hScrDC,x,y,m_bitmap_cx,m_bitmap_cy,hMemDC,0,0,m_bitmap_cx,m_bitmap_cy,crTransparent);
  ::DeleteDC(hMemDC) ;        //删除内存DC
}

void DrawStretch(HWND hWnd=NULL,int x=0,int y=0,int width=100,int height=100)
{
  HDC hScrDC=GetDC(hWnd);        //创建屏幕DC
  DrawStretch(hScrDC,x,y,width,height);
  ::ReleaseDC(hWnd,hScrDC) ;       //释放屏幕DC
}

void DrawStretch(HDC hScrDC=NULL,int x=0,int y=0,int width=100,int height=100)
{
  HDC hMemDC=CreateCompatibleDC(hScrDC);    //创建内存DC
  ::SelectObject(hMemDC,m_bitmap);      //把位图选进内存DC
  SetStretchBltMode(hScrDC,COLORONCOLOR);  //一定要先调用这个
  StretchBlt(hScrDC,x,y,width,height,hMemDC,0,0,m_bitmap_cx,m_bitmap_cy,SRCCOPY); //内存DC映射到屏幕DC
  ::DeleteDC(hMemDC) ;        //删除内存DC
}
};

void CDemoDlg::OnButton1()
{
CDrawBitmap g_bmp1("D://My Documents//My Pictures//风景图片//4244123431.bmp");
g_bmp1.Draw(m_hWnd);
}

void CDemoDlg::OnButton2()
{
CDrawBitmap g_bmp2("D://My Documents//My Pictures//风景图片//plane.bmp");
g_bmp2.DrawTransparent(m_hWnd);

}

void CDemoDlg::OnButton3()
{
CDrawBitmap g_bmp3("D://My Documents//My Pictures//风景图片//jzg2.bmp");
g_bmp3.DrawTransparent(m_hWnd);

}