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一.BitBlt

將一幅位圖從一個設備場景復制到另一個,即復制像素,前面參數為目標,后者為源

case WM_PAINT:hdcClient = BeginPaint (hwnd, &ps) ;hdcWindow = GetWindowDC (hwnd) ;for (y = 0 ; y < cyClient ; y += cySource)for (x = 0 ; x < cxClient ; x += cxSource){BitBlt (hdcClient, x, y, cxSource, cySource,hdcWindow, 0, 0, SRCCOPY) ;}ReleaseDC (hwnd, hdcWindow) ;EndPaint (hwnd, &ps) ;return 0 ;

二.拉伸位圖(會使圖片不清晰)

使用StretchBlt函數,比BitBlt多了兩個參數

case WM_PAINT:hdcClient = BeginPaint (hwnd, &ps) ;hdcWindow = GetWindowDC (hwnd) ;StretchBlt (hdcClient, 0, 0, cxClient, cyClient,hdcWindow, 0, 0, cxSource, cySource, MERGECOPY) ;ReleaseDC (hwnd, hdcWindow) ;EndPaint (hwnd, &ps) ;return 0 ;

三.創建位圖

3.1

hBitmap = CreateCompatibleBitmap (hdc, cx, cy) ; //此函數建立了一個與設備兼容的位圖 hBitmap CreateBitmapIndirect (&bitmap) ; //通過結構體創建

先LoadBitmap 載入位圖

然后創建CreateCompatibleDC

BitBlt 拷貝像素

switch(message) { case WM_CREATE:hInstance = ((LPCREATESTRUCT) lParam)->hInstance ;hBitmap = LoadBitmap (hInstance, TEXT ("Bricks")) ;GetObject (hBitmap, sizeof (BITMAP), &bitmap) ;cxSource = bitmap.bmWidth ;cySource = bitmap.bmHeight ;return 0 ; case WM_SIZE:cxClient = LOWORD (lParam) ;cyClient = HIWORD (lParam) ;return 0 ; case WM_PAINT:hdc = BeginPaint (hwnd, &ps) ;hdcMem = CreateCompatibleDC (hdc) ;SelectObject (hdcMem, hBitmap) ;for (y = 0 ; y < cyClient ; y += cySource)for (x = 0 ; x < cxClient ; x += cxSource){BitBlt (hdc, x, y, cxSource, cySource, hdcMem, 0, 0, SRCCOPY) ;}DeleteDC (hdcMem) ;EndPaint (hwnd, &ps) ;return 0 ; case WM_DESTROY:DeleteObject (hBitmap) ;PostQuitMessage (0) ;return 0 ; }

3.2用位圖創建文字,用0和1表示,相當于畫像素點的意思.

填充BITMAP的bmBits字段

static BITMAP bitmap = { 0, 8, 8, 2, 1, 1 } ;static BYTE bits [8][2]={ 0xFF, 0, 0x0C, 0, 0x0C, 0, 0x0C, 0,0xFF, 0, 0xC0, 0, 0xC0, 0, 0xC0, 0 } ;static HBITMAP hBitmap ;static int cxClient, cyClient, cxSource, cySource ;HDC hdc, hdcMem ;int x, y ;PAINTSTRUCT ps ;switch (message){case WM_CREATE:bitmap.bmBits = bits ;hBitmap = CreateBitmapIndirect (&bitmap) ;cxSource = bitmap.bmWidth ;cySource = bitmap.bmHeight ;return 0 ;

3.3使用位圖創建筆刷

hBitmap = LoadBitmap (hInstance, TEXT ("Bricks")); hBrush = CreatePatternBrush (hBitmap); DeleteObject (hBitmap);

3.4在位圖中繪圖

用CreateCompatibleBitmap 創建一幅與設備兼容有關位圖,然后選擇位圖,SelectObject (hdcMem, hBitmap)

hdc = GetDC (hwnd) ; hdcMem = CreateCompatibleDC (hdc) ; GetTextExtentPoint32 (hdc, szText, lstrlen (szText), &size); cxBitmap = size.cx ; cyBitmap = size.cy; hBitmap = CreateCompatibleBitmap (hdc, cxBitmap, cyBitmap); ReleaseDC (hwnd, hdc) ; SelectObject (hdcMem, hBitmap) ; TextOut (hdcMem, 0, 0, szText, lstrlen (szText));

創建好以后就可以同上方法用BitBlt或者StretchBlt方法操作像素了

四.菜單插入位圖

hBitmap = StretchBitmap (LoadBitmap (hInstance, TEXT ("BitmapFont"))) ; AppendMenu (hMenu, MF_BITMAP | MF_POPUP, (int) hMenuPopup,(PTSTR) (LONG) hBitmap) ;

轉載于:https://www.cnblogs.com/Clingingboy/archive/2011/05/26/2059243.html

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