MFC-相关总结

1.获取鼠标点击颜色

 CPoint pt;
 CString mycolor;
 GetCursorPos(&pt);//得到点位置

 HDC hDC = ::GetDC(NULL);//创建绘制空的DC
 COLORREF clr = ::GetPixel(hDC,pt.x, pt.y );//pt.x, pt.y
 CString ClrText;

 ClrText.Format("红色值:%d;",GetRValue(clr));
 mycolor="当前位置颜色值分别是=>"+ClrText;

 ClrText.Format("绿色值%d;",GetGValue(clr));
 mycolor=mycolor+ClrText;

 ClrText.Format("蓝色值%d.\n",GetBValue(clr));
 mycolor=mycolor+ClrText;

 printf(mycolor);

 ::ReleaseDC(NULL, hDC);

2 按像素处理CImage，下面是进行了一个灰度处理

CImage *image = new CImage();
 image->Load("light_color.png");
 image->SetTransparentColor(RGB(255, 252 , 253));

 int maxY = image->GetHeight(), maxX = image->GetWidth();
 byte r,g,b,avg;
 byte* pRealData;
 pRealData = (byte*)image->GetBits();

 int pit = image->GetPitch();
 int bitCount = image->GetBPP()/8;

 for (int y=0; y<maxY; y++) {
      for (int x=0; x<maxX; x++) {
           int r = (int)(*(pRealData + pit*y + x*bitCount + 2));
           int g = (int)(*(pRealData + pit*y + x*bitCount + 1));
           int b = (int)(*(pRealData + pit*y + x*bitCount + 0));

           if (!isShowColor(r, g, b))
           {
                *(pRealData + pit*y + x*bitCount) = 253;
                *(pRealData + pit*y + x*bitCount +1) = 252;
                *(pRealData + pit*y + x*bitCount +2) = 255;
           }
           //如果是8位灰度图像，直接读取一个BYTE位为灰度值

           //如果是24位RGB图像，则依次读取pixAddr,pixAddr+1,pixAddr+2为B、G、R分量值
      }
 }

 TransparentPNG(image);

 CImage *tmp = test;
 test = image;
 if(tmp != NULL) delete tmp;

}

3 特效制作-图片掉下效果

 定时调用这个部分
  
 float addDegree = 35.0;
 float addTmp = 1.05;

 if(degree < 400)
 {
      degree += 400;
      //icon_china.Draw(m_cacheDC, china_x, (china_y + china_height) * degree / 500 - china_y, china_width, china_height);
 }
 else if (degree < 600)
 {
      degree += 50;
      int x = (degree - 400) / 200.0 * china_width * addTmp / 2.0;
      int y = (degree - 400) / 200.0 * china_height * addTmp;
      icon_china.Draw(m_cacheDC, china_x + china_width / 2 - x, china_y + china_height - y,  x * 2, y);
 }
 else if(degree < 700)
 {
      degree += addDegree;
      int x = ((700 - degree) / 100.0 * (addTmp - 1) + 1) * china_width * addTmp / 2.0;
      int y = ((700 - degree) / 100.0 * (addTmp - 1) + 1) * china_height * addTmp;
      icon_china.Draw(m_cacheDC, china_x + china_width / 2 - x, china_y + china_height - y,  x * 2, y);
 }
 else
 {
      icon_china.Draw(m_cacheDC, china_x, china_y, china_width, china_height);
 }

4. 特效制作-图片弹出效果

`

定时调用这个部分
 float addDegree = 35.0;
 float addTmp = 1.05;
 if(degree < 400)
 {
      degree += 400;
      //icon_china.Draw(m_cacheDC, china_x, (china_y + china_height) * degree / 500 - china_y, china_width, china_height);
 }
 else if (degree < 600)
 {
      degree += 50;
      int x = (degree - 400) / 200.0 * china_width * addTmp / 2.0;
      int y = (degree - 400) / 200.0 * china_height * addTmp;
      icon_china.Draw(m_cacheDC, china_x + china_width / 2 - x, china_y + china_height - y,  x * 2, y);
 }
 else if(degree < 700)
 {
      degree += addDegree;
      int x = ((700 - degree) / 100.0 * (addTmp - 1) + 1) * china_width * addTmp / 2.0;
      int y = ((700 - degree) / 100.0 * (addTmp - 1) + 1) * china_height * addTmp;
      icon_china.Draw(m_cacheDC, china_x + china_width / 2 - x, china_y + china_height - y,  x * 2, y);
 }
 else
 {
      icon_china.Draw(m_cacheDC, china_x, china_y, china_width, china_height);
 }