python调用C语言实现全屏截图

可以使用Python的ctypes模块来调用C语言的库函数来实现全屏截图。以下是一个示例代码：

import ctypes
import numpy as np
from PIL import Image

# Load C library
libc = ctypes.CDLL('libc.so.6', mode=ctypes.RTLD_GLOBAL)

# Define C functions
libc.XOpenDisplay.restype = ctypes.c_void_p
libc.XDefaultRootWindow.restype = ctypes.c_ulong
libc.XGetImage.restype = ctypes.c_void_p
libc.XDestroyImage.argtypes = [ctypes.c_void_p]
libc.XCloseDisplay.argtypes = [ctypes.c_void_p]

# Define constants
DISPLAY_NAME = None
ROOT_WINDOW_ID = 0
IMAGE_FORMAT = 2  # ZPixmap
PIXEL_DEPTH = 24

# Get display and root window
display = libc.XOpenDisplay(DISPLAY_NAME)
root_window = libc.XDefaultRootWindow(display)

# Get screen size
screen_width = ctypes.c_int()
screen_height = ctypes.c_int()
libc.XDisplayWidth(display, ROOT_WINDOW_ID, ctypes.byref(screen_width))
libc.XDisplayHeight(display, ROOT_WINDOW_ID, ctypes.byref(screen_height))

# Get image data
image = libc.XGetImage(display, root_window, 0, 0, screen_width.value, screen_height.value, AllPlanes, IMAGE_FORMAT)
data = np.array(image.data, dtype=np.uint8)

# Create PIL image
pil_image = Image.frombytes('RGB', (screen_width.value, screen_height.value), data, 'raw', 'BGRX', 0, 1)

# Clean up
libc.XDestroyImage(image)
libc.XCloseDisplay(display)

请注意，这个示例代码仅适用于Linux系统。在其他操作系统上，您需要使用不同的C库函数来实现全屏截图。