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14.如何将32 x 32像素图标转换为16 x 16像素值的图标
HICON Convert32x32IconTo16x16(HICON h32x32Icon){ HDC hMainDC, hMemDC1, hMemDC2; HICON h16x16Icon; BITMAP bmp; HBITMAP hOldBmp1, hOldBmp2; ICONINFO IconInfo32x32, IconInfo16x16; GetIconInfo(h32x32Icon, &IconInfo32x32); hMainDC = ::GetDC(m_hWnd); hMemDC1 = CreateCompatibleDC(hMainDC); hMemDC2 = CreateCompatibleDC(hMainDC); GetObject(IconInfo32x32.hbmColor, sizeof(BITMAP), &bmp); IconInfo16x16.hbmColor = CreateBitmap( 16, 16, bmp.bmPlanes, bmp.bmBitsPixel, NULL); hOldBmp1 = (HBITMAP) SelectObject( hMemDC1, IconInfo32x32.hbmColor); hOldBmp2 = (HBITMAP) SelectObject( hMemDC2, IconInfo16x16.hbmColor); StretchBlt(hMemDC2, 0, 0, 16, 16, hMemDC1, 0, 0, 32, 32, SRCCOPY ); GetObject(IconInfo32x32.hbmMask, sizeof(BITMAP), &bmp); IconInfo16x16.hbmMask = CreateBitmap( 16, 16, bmp.bmPlanes, bmp.bmBitsPixel, NULL); SelectObject(hMemDC1, IconInfo32x32.hbmMask); SelectObject(hMemDC2, IconInfo16x16.hbmMask); StretchBlt(hMemDC2, 0, 0, 16, 16, hMemDC1, 0, 0, 32, 32, SRCCOPY ); SelectObject(hMemDC1, hOldBmp1); SelectObject(hMemDC2, hOldBmp2); IconInfo16x16.fIcon = TRUE; h16x16Icon = CreateIconIndirect(&IconInfo16x16); DeleteObject(IconInfo32x32.hbmColor); DeleteObject(IconInfo16x16.hbmColor); DeleteObject(IconInfo32x32.hbmMask); DeleteObject(IconInfo16x16.hbmMask); DeleteDC(hMemDC1); DeleteDC(hMemDC2); ::ReleaseDC(m_hWnd, hMainDC); return h16x16Icon;} |
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