我们从Python开源项目中，提取了以下8个代码示例，用于说明如何使用win32gui.CreateCompatibleDC()。
def prep_menu_icon(self, icon): # First load the icon. ico_x = win32api.GetSystemMetrics(win32con.SM_CXSMICON) ico_y = win32api.GetSystemMetrics(win32con.SM_CYSMICON) hicon = win32gui.LoadImage(0, icon, win32con.IMAGE_ICON, ico_x, ico_y, win32con.LR_LOADFROMFILE) hdcBitmap = win32gui.CreateCompatibleDC(0) hdcScreen = win32gui.GetDC(0) hbm = win32gui.CreateCompatibleBitmap(hdcScreen, ico_x, ico_y) hbmOld = win32gui.SelectObject(hdcBitmap, hbm) # Fill the background. brush = win32gui.GetSysColorBrush(win32con.COLOR_MENU) win32gui.FillRect(hdcBitmap, (0, 0, 16, 16), brush) # unclear if brush needs to be feed. Best clue I can find is: # "GetSysColorBrush returns a cached brush instead of allocating a new # one." - implies no DeleteObject # draw the icon win32gui.DrawIconEx(hdcBitmap, 0, 0, hicon, ico_x, ico_y, 0, 0, win32con.DI_NORMAL) win32gui.SelectObject(hdcBitmap, hbmOld) win32gui.DeleteDC(hdcBitmap) return hbm
def OnPaint(self, hwnd, msg, wp, lp): dc, ps=win32gui.BeginPaint(hwnd) wndrect = win32gui.GetClientRect(hwnd) wndwidth = wndrect[2]-wndrect[0] wndheight = wndrect[3]-wndrect[1] win32clipboard.OpenClipboard() try: try: hbitmap = win32clipboard.GetClipboardData(win32clipboard.CF_BITMAP) except TypeError: font=win32gui.LOGFONT() font.lfHeight=15 #int(wndheight/20) font.lfWidth=15 #font.lfHeight # font.lfWeight=150 hf=win32gui.CreateFontIndirect(font) win32gui.SelectObject(dc,hf) win32gui.SetBkMode(dc, win32con.TRANSPARENT) win32gui.SetTextColor(dc,win32api.RGB(0,0,0)) win32gui.DrawText(dc,'No bitmaps are in the clipboard\n(try pressing the PrtScn button)', -1, (0,0, wndwidth, wndheight), win32con.DT_CENTER) else: bminfo = win32gui.GetObject(hbitmap) dcDC = win32gui.CreateCompatibleDC(None) win32gui.SelectObject(dcDC, hbitmap) win32gui.StretchBlt(dc, 0, 0, wndwidth, wndheight, dcDC, 0, 0, bminfo.bmWidth, bminfo.bmHeight, win32con.SRCCOPY) win32gui.DeleteDC(dcDC) win32gui.EndPaint(hwnd, ps) finally: win32clipboard.CloseClipboard() return 0
def __init_screen_handles(self): # opengl windows cannot get from it's hwnd, so we use the screen hwnd = win32gui.GetDesktopWindow() # get screen size and offset left, top, right, bottom = self.rect width, height = right-left, bottom-top # the device context of the window hdcwin = win32gui.GetWindowDC(hwnd) # make a temporary dc hdcmem = win32gui.CreateCompatibleDC(hdcwin) # make a temporary bitmap in memory, this is a PyHANDLE object hbmp = win32gui.CreateCompatibleBitmap(hdcwin, width, height) # select bitmap for temporary dc win32gui.SelectObject(hdcmem, hbmp) # check the bitmap object infomation bmp = win32gui.GetObject(hbmp) bi = BITMAPINFOHEADER() bi.biSize = ctypes.sizeof(BITMAPINFOHEADER) bi.biWidth = bmp.bmWidth bi.biHeight = bmp.bmHeight bi.biPlanes = bmp.bmPlanes bi.biBitCount = bmp.bmBitsPixel bi.biCompression = 0 # BI_RGB bi.biSizeImage = 0 bi.biXPelsPerMeter = 0 bi.biYPelsPerMeter = 0 bi.biClrUsed = 0 bi.biClrImportant = 0 # calculate total size for bits pixel = bmp.bmBitsPixel size = ((bmp.bmWidth * pixel + pixel - 1)/pixel) * 4 * bmp.bmHeight buf = (ctypes.c_char * size)() self._hdcwin = hdcwin self._hdcmem = hdcmem self._bi = bi self._hbmp = hbmp self._buf = buf
def screen(self): """PIL Image of current window screen. (the window must be on the top) reference: https://msdn.microsoft.com/en-us/library/dd183402(v=vs.85).aspx""" # opengl windows cannot get from it's hwnd, so we use the screen hwnd = win32gui.GetDesktopWindow() # get window size and offset left, top, right, bottom = self.rect width, height = right-left, bottom-top # the device context of the window hdcwin = win32gui.GetWindowDC(hwnd) # make a temporary dc hdcmem = win32gui.CreateCompatibleDC(hdcwin) # make a temporary bitmap in memory, this is a PyHANDLE object hbmp = win32gui.CreateCompatibleBitmap(hdcwin, width, height) # select bitmap for temporary dc win32gui.SelectObject(hdcmem, hbmp) # copy bits to temporary dc win32gui.BitBlt(hdcmem, 0, 0, width, height, hdcwin, left, top, win32con.SRCCOPY) # check the bitmap object infomation bmp = win32gui.GetObject(hbmp) bi = BITMAPINFOHEADER() bi.biSize = ctypes.sizeof(BITMAPINFOHEADER) bi.biWidth = bmp.bmWidth bi.biHeight = bmp.bmHeight bi.biPlanes = bmp.bmPlanes bi.biBitCount = bmp.bmBitsPixel bi.biCompression = 0 # BI_RGB bi.biSizeImage = 0 bi.biXPelsPerMeter = 0 bi.biYPelsPerMeter = 0 bi.biClrUsed = 0 bi.biClrImportant = 0 # calculate total size for bits pixel = bmp.bmBitsPixel size = ((bmp.bmWidth * pixel + pixel - 1)/pixel) * 4 * bmp.bmHeight buf = (ctypes.c_char * size)() # read bits into buffer windll.gdi32.GetDIBits(hdcmem, hbmp.handle, 0, bmp.bmHeight, buf, ctypes.byref(bi), win32con.DIB_RGB_COLORS) # make a PIL Image img = Image.frombuffer('RGB', (bmp.bmWidth, bmp.bmHeight), buf, 'raw', 'BGRX', 0, 1) img = img.transpose(Image.FLIP_TOP_BOTTOM) # cleanup win32gui.DeleteObject(hbmp) win32gui.DeleteObject(hdcmem) win32gui.ReleaseDC(hwnd, hdcwin) return img
