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windowcapture.py
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windowcapture.py
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import numpy as np
from win32 import win32gui
import win32ui # Ignore these warnings, pylint
import win32co
class WindowCapture:
# properties
w = 0
h = 0
hwnd = None
cropped_x = 0
cropped_y = 0
offset_x = 0
offset_y = 0
def __init__(self, window_name=None):
if window_name is None:
self.hwnd = win32gui.GetDesktopWindow()
else:
self.hwnd = win32gui.FindWindow(None, window_name)
if not self.hwnd:
raise Exception('Window not found: {}'.format(window_name))
window_rect = win32gui.GetWindowRect(self.hwnd)
self.w = window_rect[2] - window_rect[0]
self.h = window_rect[3] - window_rect[1]
border_pixels = 0
titlebar_pixels = 0
# self.w = self.w - (border_pixels * 2)
# self.h = self.h - titlebar_pixels - border_pixels
# self.cropped_x = border_pixels
# self.cropped_y = titlebar_pixels
self.offset_x = window_rect[0] + self.cropped_x
self.offset_y = window_rect[1] + self.cropped_y
def get_screenshot(self):
wDC = win32gui.GetWindowDC(self.hwnd)
dcObj = win32ui.CreateDCFromHandle(wDC)
cDC = dcObj.CreateCompatibleDC()
dataBitMap = win32ui.CreateBitmap()
dataBitMap.CreateCompatibleBitmap(dcObj, self.w, self.h)
cDC.SelectObject(dataBitMap)
cDC.BitBlt((0, 0), (self.w, self.h), dcObj, (self.cropped_x, self.cropped_y), win32con.SRCCOPY)
signedIntsArray = dataBitMap.GetBitmapBits(True)
# img = np.fromstring(signedIntsArray, dtype='uint8')
img = np.frombuffer(signedIntsArray, dtype='uint8')
img.shape = (self.h, self.w, 4)
dcObj.DeleteDC()
cDC.DeleteDC()
win32gui.ReleaseDC(self.hwnd, wDC)
win32gui.DeleteObject(dataBitMap.GetHandle())
img = img[...,:3]
img = np.ascontiguousarray(img)
return img
@staticmethod
def list_window_names():
def winEnumHandler(hwnd, ctx):
if win32gui.IsWindowVisible(hwnd):
print(hex(hwnd), win32gui.GetWindowText(hwnd))
win32gui.EnumWindows(winEnumHandler, None)
def get_screen_position(self, pos):
return (pos[0] + self.offset_x, pos[1] + self.offset_y)