import numpy, cv2
import win32gui, win32api, win32con, win32ui
import time
from PIL import Image
def get_window_position(window_title):
    """
    获取指定窗口的左上角在桌面的位置
    :param window_title: 窗口标题（支持模糊匹配）
    :return: (x, y) 坐标元组，未找到返回 None
    """
    # 查找目标窗口句柄
    target_hwnd = None

    def enum_windows_callback(hwnd, _):
        nonlocal target_hwnd
        if win32gui.IsWindowVisible(hwnd):
            title = win32gui.GetWindowText(hwnd)
            if window_title.lower() in title.lower():
                # 检查是否是顶级窗口（排除子窗口）
                if win32gui.GetParent(hwnd) == 0:
                    target_hwnd = hwnd
                    return False  # 停止枚举
        return True  # 继续枚举

    # 枚举所有窗口
    win32gui.EnumWindows(enum_windows_callback, None)

    # 获取窗口位置
    if target_hwnd:
        rect = win32gui.GetWindowRect(target_hwnd)
        return rect[0], rect[1]
    return None, None
class WindowsAPI():

    def __init__(self, hwnd=None, region=None):
        # 如果传入 hwnd 则直接使用传入的句柄，否则设为 None
        self.hWnd = hwnd
        self.region = region  # region 格式为 (left, top, right, bottom)

    def setRegion(self, region):
        """设置截图区域"""
        self.region = region

    def getDesktopImg(self):
        if not self.region:
            print("请传入有效的截图区域")
            return None

        left, top, right, bottom = self.region
        width = right - left
        height = bottom - top

        # 获取桌面的设备上下文句柄
        hWndDC = win32gui.GetWindowDC(win32gui.GetDesktopWindow())
        # 创建设备描述表
        mfcDC = win32ui.CreateDCFromHandle(hWndDC)
        # 内存设备描述表
        saveDC = mfcDC.CreateCompatibleDC()
        # 创建位图对象
        saveBitMap = win32ui.CreateBitmap()
        # 分配存储空间
        saveBitMap.CreateCompatibleBitmap(mfcDC, width, height)
        # 将位图对象选入到内存设备描述表
        saveDC.SelectObject(saveBitMap)

        # 截取指定区域
        saveDC.BitBlt((0, 0), (width, height), mfcDC, (left, top), win32con.SRCCOPY)

        # 获取位图信息
        signedIntsArray = saveBitMap.GetBitmapBits(True)
        im_opencv = numpy.frombuffer(signedIntsArray, dtype='uint8')
        im_opencv.shape = (height, width, 4)

        # 内存释放
        win32gui.DeleteObject(saveBitMap.GetHandle())
        saveDC.DeleteDC()
        mfcDC.DeleteDC()
        win32gui.ReleaseDC(win32gui.GetDesktopWindow(), hWndDC)

        im_opencv = cv2.cvtColor(im_opencv, cv2.COLOR_BGR2RGB)  # rgb 修改通道数并转换图像
        # im_opencv=im_opencv[40:-1, 2:]
        im_PIL = Image.fromarray(im_opencv)  # 图像改成对象类型
        return [im_opencv,im_PIL]

    def showDesktopImg(self):
        imgs = self.getDesktopImg()

        if imgs is None:
            print("无法获取截图")
            return

        im_opencv = imgs[0]  # 取 OpenCV 图像
        cv2.imshow("Desktop Screenshot", im_opencv)
        cv2.waitKey(0)
        cv2.destroyAllWindows()


# window_title = "Torchlight:Infinite"
# left, top = get_window_position(window_title)
#
# if left is None or top is None:
#     print(f"错误: 未找到标题包含 '{window_title}' 的窗口")
#     exit(1)
#
# print(f"找到窗口 '{window_title}' 位置: ({left}, {top})")

 # 2. 设置截图区域 (左上角x, 左上角y, 右下角x, 右下角y)
# width, height = 1282, 761

custom_region  = (0, 30, 1280, 30+720)
winApi = WindowsAPI(region=custom_region)
print(winApi.region)
# winApi.showDesktopImg()