7,655
社区成员
发帖
与我相关
我的任务
分享
//由彩色ICON生成灰色ICON
HICON CreateGrayscaleIcon(HICON hIcon)
{
HICON hGrayIcon = NULL;
HDC hMainDC = NULL, hMemDC1 = NULL, hMemDC2 = NULL;
BITMAP bmp;
HBITMAP hOldBmp1 = NULL, hOldBmp2 = NULL;
ICONINFO csII, csGrayII;
BOOL bRetValue = FALSE;
bRetValue = ::GetIconInfo(hIcon, &csII);
if (bRetValue == FALSE)
{
return NULL;
}
hMainDC = ::GetDC(NULL);
hMemDC1 = ::CreateCompatibleDC(hMainDC);
hMemDC2 = ::CreateCompatibleDC(hMainDC);
if (hMainDC == NULL || hMemDC1 == NULL || hMemDC2 == NULL)
{
return NULL;
}
if (::GetObject(csII.hbmColor, sizeof(BITMAP), &bmp))
{
DWORD dwWidth = csII.xHotspot*2;
DWORD dwHeight = csII.yHotspot*2;
csGrayII.hbmColor = ::CreateBitmap(dwWidth, dwHeight, bmp.bmPlanes, bmp.bmBitsPixel, NULL);
if (csGrayII.hbmColor)
{
hOldBmp1 = (HBITMAP)::SelectObject(hMemDC1, csII.hbmColor);
hOldBmp2 = (HBITMAP)::SelectObject(hMemDC2, csGrayII.hbmColor);
//::BitBlt(hMemDC2, 0, 0, dwWidth, dwHeight, hMemDC1, 0, 0, SRCCOPY);
DWORD dwLoopY = 0, dwLoopX = 0;
COLORREF crPixel = 0;
BYTE byNewPixel = 0;
for (dwLoopY = 0; dwLoopY < dwHeight; dwLoopY++)
{
for (dwLoopX = 0; dwLoopX < dwWidth; dwLoopX++)
{
crPixel = ::GetPixel(hMemDC1, dwLoopX, dwLoopY);
byNewPixel = (BYTE)((GetRValue(crPixel) * 0.299) + (GetGValue(crPixel) * 0.587) + (GetBValue(crPixel) * 0.114));
if (crPixel)
{
SetPixel(hMemDC2, dwLoopX, dwLoopY, RGB(byNewPixel, byNewPixel, byNewPixel));
}
}
}
::SelectObject(hMemDC1, hOldBmp1);
::SelectObject(hMemDC2, hOldBmp2);
csGrayII.hbmMask = csII.hbmMask;
csGrayII.fIcon = TRUE;
hGrayIcon = ::CreateIconIndirect(&csGrayII);
}
::DeleteObject(csGrayII.hbmColor);
//::DeleteObject(csGrayII.hbmMask);
}
::DeleteObject(csII.hbmColor);
::DeleteObject(csII.hbmMask);
::DeleteDC(hMemDC1);
::DeleteDC(hMemDC2);
::ReleaseDC(NULL, hMainDC);
return hGrayIcon;
}
//测试代码
m_hColorIcon = (HICON)::LoadImage(AfxGetInstanceHandle(), MAKEINTRESOURCE (IDI_NOTEBOOK),IMAGE_ICON, 0, 0, 0);
m_hGrayIcon = CreateGrayscaleIcon(m_hColorIcon);