VC2010 MFC 使用图片制作不规则外形窗口

1.新建一个MFC项目,如图所示

 

 

 

2.在设计视图右键对话框,选择属性选项并设置窗口属性,如下图所示

 

 

3.CTRL+S保存(养成良好的保存数据的习惯,能有效避免错误的发生机率)

 

4.将资源图片导入,素材图片要准备两张,一张为背景图"Background.bmp",另一张"Border.bmp"是"Background.bmp"的边框图.如下图所示

 

 

 

找到刚刚复制进去的res文件夹打开

 

 

选中第一副图,点打开按钮

 

 继续按照上述方法添加另外一张图

两张图片都导入后可以展开节点看到如下效果!

 

CTRL+S 保存,好习惯啊

 

 

5.切换到"解决方案资源管理器"选项卡,双击展开"头文件"节点,双击TestBorder.Dlg.h打开,如下图

6.在"public:"与" CTestBorderDlg(CWnd* pParent = NULL); "中间插入一行,添加如下代码:

HRGN BitmapToRegion(HBITMAP hBmp, COLORREF cTransparentColor, COLORREF cTolerance=NULL);

添加后效果如图所示,记得CTRL+S保存

7.找到"类视图"选项卡,双击打开"OnInitDialog()",在指定位置处添加如下代码并保存.

CBitmap bmp;
if(bmp.LoadBitmap(IDB_BITMAP2))
{
    HRGN rgn;
    rgn = BitmapToRegion((HBITMAP)bmp, RGB(0,0,0));
    SetWindowRgn(rgn, TRUE);
    bmp.DeleteObject();
}

.如图所示

8.双击打开"OnPaint()"在指定位置处增加如下代码,并保存

 

CClientDC dc(this);
CDC memDC;
memDC.CreateCompatibleDC(&dc);

CBitmap bmp;
bmp.LoadBitmap(IDB_BITMAP1);
CBitmap *pOldBmp;
pOldBmp = memDC.SelectObject(&bmp);

BITMAP bm;
bmp.GetBitmap(&bm);

dc.BitBlt(0, 0, bm.bmWidth, bm.bmHeight, &memDC, 0, 0, SRCCOPY);

memDC.SelectObject(pOldBmp);
bmp.DeleteObject();

 9.拖动滚动条到代码最底部,添加如下代码,并保存

HRGN CTestBorderDlg::BitmapToRegion(HBITMAP hBmp, COLORREF cTransparentColor, COLORREF cTolerance)
{
    HRGN hRgn = NULL;

    if (hBmp)
    {
        HDC hMemDC = CreateCompatibleDC(NULL);
        if (hMemDC)
        {
            BITMAP bm;
            GetObject(hBmp, sizeof(bm), &bm);

            //创建一个32位色的位图，并选进内存设备环境
            BITMAPINFOHEADER RGB32BITSBITMAPINFO = {
                        sizeof(BITMAPINFOHEADER),       // biSize
                            bm.bmWidth,                 // biWidth;
                            bm.bmHeight,                // biHeight;
                            1,                          // biPlanes;
                            32,                         // biBitCount
                            BI_RGB,                     // biCompression;
                            0,                          // biSizeImage;
                            0,                          // biXPelsPerMeter;
                            0,                          // biYPelsPerMeter;
                            0,                          // biClrUsed;
                            0                           // biClrImportant;
                                                    };
            VOID * pbits32;
            HBITMAP hbm32 = CreateDIBSection(hMemDC,(BITMAPINFO *)&RGB32BITSBITMAPINFO, DIB_RGB_COLORS, &pbits32, NULL, 0);
            if (hbm32)
            {
                HBITMAP holdBmp = (HBITMAP)SelectObject(hMemDC, hbm32);

                // Create a DC just to copy the bitmap into the memory DC
                HDC hDC = CreateCompatibleDC(hMemDC);
                if (hDC)
                {
                    // Get how many bytes per row we have for the bitmap bits (rounded up to 32 bits)
                    BITMAP bm32;
                    GetObject(hbm32, sizeof(bm32), &bm32);
                    while (bm32.bmWidthBytes % 4)
                        bm32.bmWidthBytes++;

                    // Copy the bitmap into the memory DC
                    HBITMAP holdBmp = (HBITMAP)SelectObject(hDC, hBmp);
                    BitBlt(hMemDC, 0, 0, bm.bmWidth, bm.bmHeight, hDC, 0, 0, SRCCOPY);

                    // For better performances, we will use the ExtCreateRegion() function to create the
                    // region. This function take a RGNDATA structure on entry. We will add rectangles by
                    // amount of ALLOC_UNIT number in this structure.
#define ALLOC_UNIT  100
                    DWORD maxRects = ALLOC_UNIT;
                    HANDLE hData = GlobalAlloc(GMEM_MOVEABLE, sizeof(RGNDATAHEADER) + (sizeof(RECT) * maxRects));
                    RGNDATA *pData = (RGNDATA *)GlobalLock(hData);
                    pData->rdh.dwSize = sizeof(RGNDATAHEADER);
                    pData->rdh.iType = RDH_RECTANGLES;
                    pData->rdh.nCount = pData->rdh.nRgnSize = 0;
                    SetRect(&pData->rdh.rcBound, MAXLONG, MAXLONG, 0, 0);

                    // Keep on hand highest and lowest values for the "transparent" pixels
                    BYTE lr = GetRValue(cTransparentColor);
                    BYTE lg = GetGValue(cTransparentColor);
                    BYTE lb = GetBValue(cTransparentColor);
                    BYTE hr = min(0xff, lr + GetRValue(cTolerance));
                    BYTE hg = min(0xff, lg + GetGValue(cTolerance));
                    BYTE hb = min(0xff, lb + GetBValue(cTolerance));

                    // Scan each bitmap row from bottom to top (the bitmap is inverted vertically)
                    BYTE *p32 = (BYTE *)bm32.bmBits + (bm32.bmHeight - 1) * bm32.bmWidthBytes;
                    for (int y = 0; y < bm.bmHeight; y++)
                    {
                        // Scan each bitmap pixel from left to right
                        for (int x = 0; x < bm.bmWidth; x++)
                        {
                            // Search for a continuous range of "non transparent pixels"
                            int x0 = x;
                            LONG *p = (LONG *)p32 + x;
                            while (x < bm.bmWidth)
                            {
                                BYTE b = GetRValue(*p);
                                if (b >= lr && b <= hr)
                                {
                                    b = GetGValue(*p);
                                    if (b >= lg && b <= hg)
                                    {
                                        b = GetBValue(*p);
                                        if (b >= lb && b <= hb)
                                            // This pixel is "transparent"
                                            break;
                                    }
                                }
                                p++;
                                x++;
                            }

                            if (x > x0)
                            {
                                // Add the pixels (x0, y) to (x, y+1) as a new rectangle in the region
                                if (pData->rdh.nCount >= maxRects)
                                {
                                    GlobalUnlock(hData);
                                    maxRects += ALLOC_UNIT;
                                    hData = GlobalReAlloc(hData, sizeof(RGNDATAHEADER) + (sizeof(RECT) * maxRects), GMEM_MOVEABLE);
                                    pData = (RGNDATA *)GlobalLock(hData);
                                }
                                RECT *pr = (RECT *)&pData->Buffer;
                                SetRect(&pr[pData->rdh.nCount], x0, y, x, y+1);
                                if (x0 < pData->rdh.rcBound.left)
                                    pData->rdh.rcBound.left = x0;
                                if (y < pData->rdh.rcBound.top)
                                    pData->rdh.rcBound.top = y;
                                if (x > pData->rdh.rcBound.right)
                                    pData->rdh.rcBound.right = x;
                                if (y+1 > pData->rdh.rcBound.bottom)
                                    pData->rdh.rcBound.bottom = y+1;
                                pData->rdh.nCount++;

                                // On Windows98, ExtCreateRegion() may fail if the number of rectangles is too
                                // large (ie: > 4000). Therefore, we have to create the region by multiple steps.
                                if (pData->rdh.nCount == 2000)
                                {
                                    HRGN h = ExtCreateRegion(NULL, sizeof(RGNDATAHEADER) + (sizeof(RECT) * maxRects), pData);
                                    if (hRgn)
                                    {
                                        CombineRgn(hRgn, hRgn, h, RGN_OR);
                                        DeleteObject(h);
                                    }
                                    else
                                        hRgn = h;
                                    pData->rdh.nCount = 0;
                                    SetRect(&pData->rdh.rcBound, MAXLONG, MAXLONG, 0, 0);
                                }
                            }
                        }

                        // Go to next row (remember, the bitmap is inverted vertically)
                        p32 -= bm32.bmWidthBytes;
                    }

                    // Create or extend the region with the remaining rectangles
                    HRGN h = ExtCreateRegion(NULL, sizeof(RGNDATAHEADER) + (sizeof(RECT) * maxRects), pData);
                    if (hRgn)
                    {
                        CombineRgn(hRgn, hRgn, h, RGN_OR);
                        DeleteObject(h);
                    }
                    else
                        hRgn = h;

                    // Clean up
                    GlobalFree(hData);
                    SelectObject(hDC, holdBmp);
                    DeleteDC(hDC);
                }
                DeleteObject(SelectObject(hMemDC, holdBmp));
            }
            DeleteDC(hMemDC);
        }
    }
    return hRgn;
}

10.打开"资源视图"选项卡,选择Dialog节点并双击展开,选择IDD_TESTBORDER_DIALOG并双击打开

右键->属性->"属性"选项卡中选择红色方框的按钮,下拉滚动条找到"WM_NCHITTEST"点右面的编辑区,弹出下拉列表后选择"<Add> OnNcHitTest"

 

将图1中所示代码替换为图2的代码.CTRL+S保存

图1:

 

 

图2:

再次打开"资源视图"选项卡,选择Dialog节点并双击展开,选择IDD_TESTBORDER_DIALOG并双击打开

删除对话框中的三个控件,如图所示

 调整一下对话框的尺寸,以便于完全显示图片

CTRL+S保存,F5运行即可看到如下图所示的最终效果图.(提示:此装口可直接按ESC键关闭)

 

附件为素材图片

源代码下载地址:http://www.vdisk.cn/down/index/9369459A5242