背景
我正在使用 pysdl2 创建一个窗口，并使用 SDL_Blit_Surface 在该窗口内嵌入一个skia-python表面，代码如下：
import skia
import sdl2 as sdl
from ctypes import byref as pointer
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, handlers=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
# Handlers
self.handlers = handlers
if self.handlers is None:
self.handlers = {}
# SET RGBA MASKS BASED ON BYTE_ORDER
is_big_endian = sdl.SDL_BYTEORDER == sdl.SDL_BIG_ENDIAN
self.RGBA_MASKS = self.BYTE_ORDER["BIG_ENDIAN" if is_big_endian else "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()
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):
"""
Initializes the main skia surface that will be drawn upon,
creates a raster surface.
"""
surface_blueprint = skia.ImageInfo.Make(
self.width, self.height,
ct=skia.kRGBA_8888_ColorType,
at=skia.kUnpremul_AlphaType
)
# noinspection PyArgumentList
surface = skia.Surface.MakeRaster(surface_blueprint)
return surface
def __pixels_from_skia_surface(self):
"""
Converts Skia Surface into a bytes object containing pixel data
"""
image = self.skia_surface.makeImageSnapshot()
pixels = image.tobytes()
return pixels
def __transform_skia_surface_to_SDL_surface(self):
"""
Converts Skia Surface to an SDL surface by first converting
Skia Surface to Pixel Data using .__pixels_from_skia_surface()
"""
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):
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, None,
window_surface, None
)
# Update window with new copied data
sdl.SDL_UpdateWindowSurface(self.sdl_window)
def event_loop(self):
handled_events = self.handlers.keys()
event = sdl.SDL_Event()
while True:
sdl.SDL_WaitEvent(pointer(event))
if event.type == sdl.SDL_QUIT:
break
elif event.type in handled_events:
self.handlers[event.type](event)
if __name__ == "__main__":
skiaSDLWindow = Window("Browser Test", 500, 500, flags=sdl.SDL_WINDOW_SHOWN | sdl.SDL_WINDOW_RESIZABLE)
skiaSDLWindow.event_loop()
我监控上面代码的 CPU 使用率，它保持在 20% 以下，RAM 使用率几乎没有任何变化。
问题
问题是，只要我制作一个大于 690 x 549 的窗口（或宽度和高度产品相同的任何其他尺寸），我的segfault (core dumped)CPU 使用率就会上升到 100%，而 RAM 使用率没有变化。
我已经尝试过/知道的
我知道故障是SDL_BlitSurface由faulthandlerpython中的模块和经典print("here")线路报告的。
我不熟悉像 c 这样的语言，所以根据我对段错误的基本理解，我尝试将 with 返回的字节字符串的大小Window.__pixels_from_skia_surface与sys.getsizeofC 数据类型相匹配，以查看它是否接近任何大小，因为我怀疑存在溢出。（如果这是你见过的最愚蠢的调试方法，请原谅我）。但是大小并没有接近任何 c 数据类型。