问如何在pysdl2中嵌入skia python曲面

EN

import skia
import sdl2 as sdl
from ctypes import byref


def sdl_event_loop():
    event = sdl.SDL_Event()
    running = True

    while running:
        pending_events = sdl.SDL_PollEvent(byref(event))
        while pending_events != 0:

            # QUIT HANDLER
            if event.type == sdl.SDL_QUIT:
                running = False
                sdl.SDL_Quit()
                break

            # UPDATE PENDING EVENTS
            pending_events = sdl.SDL_PollEvent(byref(event))


class Window:
    DEFAULT_FLAGS = sdl.SDL_WINDOW_SHOWN
    BYTE_ORDER = {
        # ---------- ->   RED        GREEN       BLUE        ALPHA
        "BIG_ENDIAN": (0xff000000, 0x00ff0000, 0x0000ff00, 0x000000ff),
        "LIL_ENDIAN": (0x000000ff, 0x0000ff00, 0x00ff0000, 0xff000000)
    }

    PIXEL_DEPTH = 32  # BITS PER PIXEL
    PIXEL_PITCH_FACTOR = 4  # Multiplied by Width to get BYTES PER ROW

    def __init__(self, title, width, height, x=None, y=None, flags=None):
        self.title = bytes(title, "utf8")
        self.width = width
        self.height = height

        # Center Window By default
        self.x, self.y = x, y
        if x is None:
            self.x = sdl.SDL_WINDOWPOS_CENTERED
        if y is None:
            self.y = sdl.SDL_WINDOWPOS_CENTERED

        # Override flags
        self.flags = flags
        if flags is None:
            self.flags = self.DEFAULT_FLAGS

        # SET RGBA MASKS BASED ON BYTE_ORDER
        is_big_endian = sdl.SDL_BYTEORDER == sdl.SDL_BIG_ENDIAN
        if is_big_endian:
            self.RGBA_MASKS = self.BYTE_ORDER["BIG_ENDIAN"]
        else:
            self.RGBA_MASKS = self.BYTE_ORDER["LIL_ENDIAN"]

        # CALCULATE PIXEL PITCH
        self.PIXEL_PITCH = self.PIXEL_PITCH_FACTOR * self.width

        # SKIA INIT
        self.skia_surface = self.__create_skia_surface()

        # SDL INIT
        sdl.SDL_Init(sdl.SDL_INIT_EVENTS)  # INITIALIZE SDL EVENTS
        self.sdl_window = self.__create_SDL_Window()
        sdl_event_loop()

    def __create_SDL_Window(self):
        window = sdl.SDL_CreateWindow(
            self.title,
            self.x, self.y,
            self.width, self.height,
            self.flags
        )
        return window

    def __create_skia_surface(self):
        surface_blueprint = skia.ImageInfo.Make(
            self.width, self.height,
            ct=skia.kRGBA_8888_ColorType,
            at=skia.kUnpremul_AlphaType
        )

        surface = skia.Surface.MakeRaster(surface_blueprint)
        return surface

    def __pixels_from_skia_surface(self):
        image = self.skia_surface.makeImageSnapshot()
        pixels = image.tobytes()
        return pixels

    def __transform_skia_surface_to_SDL_surface(self):
        pixels = self.__pixels_from_skia_surface()
        sdl_surface = sdl.SDL_CreateRGBSurfaceFrom(
            pixels,
            self.width, self.height,
            self.PIXEL_DEPTH, self.PIXEL_PITCH,
            *self.RGBA_MASKS
        )
        return sdl_surface

    def update(self):
        rect = sdl.SDL_Rect(0, 0, self.width, self.height)
        window_surface = sdl.SDL_GetWindowSurface(self.sdl_window)  # the SDL surface associated with the window
        transformed_skia_surface = self.__transform_skia_surface_to_SDL_surface()
        
        # Transfer skia surface to SDL window's surface
        sdl.SDL_BlitSurface(
            transformed_skia_surface, rect,
            window_surface, rect
        )

        # Update window with new copied data
        sdl.SDL_UpdateWindowSurface(self.sdl_window)


if __name__ == "__main__":
    window = Window("Browser Test", 500, 500, flags=sdl.SDL_WINDOW_SHOWN | sdl.SDL_WINDOW_RESIZABLE)