Python - Take screenshot including mouse cursor

Question

I am currently trying to take a screenshot who include mouse cursor using PIL.ImageGrab.

This is my code:

import ctypes, win32gui, win32ui
from PIL import Image, ImageGrab

size = round(ctypes.windll.shcore.GetScaleFactorForDevice(0) / 100 * 32)

cursor = get_cursor()

pixdata = cursor.load()
minsize = [size, None]

width, height = cursor.size
for y in range(height):
    for x in range(width):

        if pixdata[x, y] == (0, 0, 0, 255):
            pixdata[x, y] = (0, 0, 0, 0)

        else:
            if minsize[1] == None:
                minsize[1] = y

            if x < minsize[0]:
                minsize[0] = x

ratio = ctypes.windll.shcore.GetScaleFactorForDevice(0) / 100

img = ImageGrab.grab(bbox=None, include_layered_windows=True)

pos_win = win32gui.GetCursorPos()
pos = (round(pos_win[0]*ratio), round(pos_win[1]*ratio))


img.paste(cursor, pos, cursor)

img.save("screenshot.png")

And this is my get_cursor() function:

def get_cursor():

    hcursor = win32gui.GetCursorInfo()[1]
    hdc = win32ui.CreateDCFromHandle(win32gui.GetDC(0))
    hbmp = win32ui.CreateBitmap()
    hbmp.CreateCompatibleBitmap(hdc, 36, 36)
    hdc = hdc.CreateCompatibleDC()
    hdc.SelectObject(hbmp)
    hdc.DrawIcon((0,0), hcursor)
    
    bmpinfo = hbmp.GetInfo()
    bmpbytes = hbmp.GetBitmapBits()
    bmpstr = hbmp.GetBitmapBits(True)
    cursor = Image.frombuffer('RGB', (bmpinfo['bmWidth'], bmpinfo['bmHeight']), bmpstr, 'raw', 'BGRX', 0, 1).convert("RGBA")
    
    win32gui.DestroyIcon(hcursor)    
    win32gui.DeleteObject(hbmp.GetHandle())
    hdc.DeleteDC()


    pixdata = cursor.load()
    minsize = [32, None]

    width, height = cursor.size
    for y in range(height):
        for x in range(width):

            if pixdata[x, y] == (0, 0, 0, 255):
                pixdata[x, y] = (0, 0, 0, 0)

            else:
                if minsize[1] == None:
                    minsize[1] = y

                if x < minsize[0]:
                    minsize[0] = x


    return cursor

The problem is that some cursors are not pasted at the right position because they have pixels to the left of their position like this (do not pay attention to the quality).

How can I place the cursor image correctly (or otherwise solve the problem)?

user_18072035 · Answer

Mouse cursors have a "hot spot" which is the position where the image is placed relative to the cursor position This "hot spot" can be obtained like this:

import win32gui

hcursor = win32gui.GetCursorInfo()[1]
hotspot = win32gui.GetIconInfo(hcursor)[1:3]

So the full code is:

import ctypes, win32gui, win32ui
from PIL import Image, ImageGrab


def get_cursor():
    hcursor = win32gui.GetCursorInfo()[1]
    hdc = win32ui.CreateDCFromHandle(win32gui.GetDC(0))
    hbmp = win32ui.CreateBitmap()
    hbmp.CreateCompatibleBitmap(hdc, 36, 36)
    hdc = hdc.CreateCompatibleDC()
    hdc.SelectObject(hbmp)
    hdc.DrawIcon((0,0), hcursor)
    
    bmpinfo = hbmp.GetInfo()
    bmpstr = hbmp.GetBitmapBits(True)
    cursor = Image.frombuffer('RGB', (bmpinfo['bmWidth'], bmpinfo['bmHeight']), bmpstr, 'raw', 'BGRX', 0, 1).convert("RGBA")
    
    win32gui.DestroyIcon(hcursor)    
    win32gui.DeleteObject(hbmp.GetHandle())
    hdc.DeleteDC()


    pixdata = cursor.load()


    width, height = cursor.size
    for y in range(height):
        for x in range(width):

            if pixdata[x, y] == (0, 0, 0, 255):
                pixdata[x, y] = (0, 0, 0, 0)


    hotspot = win32gui.GetIconInfo(hcursor)[1:3]

    return (cursor, hotspot)

cursor, (hotspotx, hotspoty) = get_cursor()
cursor.save("cursor.png")


ratio = ctypes.windll.shcore.GetScaleFactorForDevice(0) / 100

img = ImageGrab.grab(bbox=None, include_layered_windows=True)

pos_win = win32gui.GetCursorPos()
pos = (round(pos_win[0]*ratio - hotspotx), round(pos_win[1]*ratio - hotspoty))


img.paste(cursor, pos, cursor)

img.save("screenshot.png")

Python - Take screenshot including mouse cursor

1 Answers