[ctypes-users] Saving a Device context (DC) into a picture file

[Michael C <mys...@gm...>]

Quick Question:
I am using this code, and I have tried to find answers with google, and I
have read through MSDN.

How do I save the DC into a png file or bmp?

thanks!


import time
import ctypes
##from ctypes import *
## I don't like this. I like to import.

time.sleep(2)

# Set up the User32 and GDI32
User32 = ctypes.WinDLL('User32', use_last_error=True)
GDI32 = ctypes.WinDLL('GDI32', use_last_error=True)

# Set up Fx to be used.
GetForegroundWindow = User32.GetForegroundWindow
GetWindowDC = User32.GetWindowDC
GetPixel = GDI32.GetPixel
ReleaseDC = User32.ReleaseDC


# main code
foreground_window = GetForegroundWindow()
dc = GetWindowDC(foreground_window)

# set timer to see how fast it runs.
t0 = time.clock()

for i in range(50):
    rgb = GetPixel(dc, 10, 10)
    #print(rgb)
    r = rgb & 0xff
    g = (rgb >> 8) & 0xff
    b = (rgb >> 16) & 0xff
##    print("RGB(%d, %d, %d)" % (r, g, b))

print(time.clock() - t0)
ReleaseDC(foreground_window, dc)