iconProvider.py

from win32com.shell import shell, shellcon  # pycharm cannot find those import but it will be interpreted
from PIL import Image
import win32api
import win32con
import win32ui
import win32gui

# Import the core and GUI elements of Qt
from PyQt5.QtGui import *


def get_icon(PATH, size):
    SHGFI_ICON = 0x000000100
    SHGFI_ICONLOCATION = 0x000001000
    SHGFI_USEFILEATTRIBUTES = 0x000000010
    if size == "small":
        SHIL_SIZE = 0x00001
    elif size == "large":
        SHIL_SIZE = 0x00002
    else:
        raise TypeError("Invalid argument for 'size'. Must be equal to 'small' or 'large'")

    ret, info = shell.SHGetFileInfo(PATH, 0, SHGFI_ICONLOCATION | SHGFI_ICON | SHIL_SIZE | SHGFI_USEFILEATTRIBUTES)
    hIcon, iIcon, dwAttr, name, typeName = info
    ico_x = win32api.GetSystemMetrics(win32con.SM_CXICON)
    hdc = win32ui.CreateDCFromHandle(win32gui.GetDC(0))
    hbmp = win32ui.CreateBitmap()
    hbmp.CreateCompatibleBitmap(hdc, ico_x, ico_x)
    hdc = hdc.CreateCompatibleDC()
    hdc.SelectObject(hbmp)
    hdc.DrawIcon((0, 0), hIcon)
    win32gui.DestroyIcon(hIcon)

    bmpinfo = hbmp.GetInfo()
    bmpstr = hbmp.GetBitmapBits(True)

    img = Image.frombuffer(
        "RGBA",
        (bmpinfo["bmWidth"], bmpinfo["bmHeight"]),
        bmpstr, "raw", "BGRA", 0, 1
    )

    if size == "small":
        img = img.resize((16, 16), Image.ANTIALIAS)

    data = img.tobytes("raw", "RGBA")
    qim = QImage(data, img.size[0], img.size[1], QImage.Format_RGBA8888)

    # qim.save("test.png")

    return qim


def main():
    img = get_icon("test.png", "small")
    img.save("test.png", "png")


if __name__ == "__main__":
    main()