我用python 3.3和PySDL2 0.5运行win7。在创建曲面时(无论采用何种方法),我得到的是LP_SDL_Surface而不是SDL_Surface。 LP_SDL_Surface缺少您期望它拥有的任何方法和属性。以下是使用documentation中的示例代码的问题:
import os
os.environ["PYSDL2_DLL_PATH"] = os.path.dirname(os.path.abspath(__file__))
import sys
import ctypes
from sdl2 import *
def main():
SDL_Init(SDL_INIT_VIDEO)
window = SDL_CreateWindow(b"Hello World",
SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED,
592, 460, SDL_WINDOW_SHOWN)
windowsurface = SDL_GetWindowSurface(window)
image = SDL_LoadBMP(b"exampleimage.bmp")
SDL_BlitSurface(image, None, windowsurface, None)
print(image.h)
SDL_UpdateWindowSurface(window)
SDL_FreeSurface(image)
running = True
event = SDL_Event()
while running:
while SDL_PollEvent(ctypes.byref(event)) != 0:
if event.type == SDL_QUIT:
running = False
break
SDL_DestroyWindow(window)
SDL_Quit()
return 0
if __name__ == "__main__":
sys.exit(main())
并且追溯是:
Traceback (most recent call last):
File "C:/.../test.py", line 35, in <module>
sys.exit(main())
File "C:/.../test.py", line 17, in main
print(image.h)
AttributeError: 'LP_SDL_Surface' object has no attribute 'h'
谷歌搜索“LP_SDL_Surface”会带来0(!)结果。
答案 0 :(得分:2)
如果使用较低级别的SDL方法(例如sdl2.SDL_LoadBMP
),则必须处理ctypes转换,引用(byref
)和解除引用指针(.contents
,{{ 1}})。
对于具体问题,正如您已经评论过的那样,使用.value
就足够了。
pysdl2(print(image.contents.h)
)提供了一些更高级别的类和方法,但是,如果需要,可以为您完成大部分转换。下面的代码实现了相同的目标,而无需触及ctypes:
sdl2.ext
它还使用纹理渲染,使用硬件加速,而不是表面blitting(基于软件)。
最后,使用更高级别import os
os.environ["PYSDL2_DLL_PATH"] = os.path.dirname(os.path.abspath(__file__))
import sys
import sdl2
import sdl2.ext
def main():
sdl2.ext.init()
window = sdl2.ext.Window(
title="Hello World!", size=(592, 460), flags=sdl2.SDL_WINDOW_SHOWN,
position=(sdl2.SDL_WINDOWPOS_CENTERED, sdl2.SDL_WINDOWPOS_CENTERED))
window.show()
renderer = sdl2.ext.Renderer(window)
factory = sdl2.ext.SpriteFactory(sdl2.ext.TEXTURE, renderer=renderer)
spriterenderer = factory.create_sprite_render_system(window)
image = factory.from_image("exampleimage.bmp")
print(image.size[1]) # image.size = (w, h)
running = True
while running:
for event in sdl2.ext.get_events():
if event.type == sdl2.SDL_QUIT:
running = False
break
spriterenderer.render(image)
sdl2.ext.quit()
return 0
if __name__ == '__main__':
sys.exit(main())
,您还可以实例化类(而不必自己编写一个全新的精灵类),如sdl2.ext
,并实现sdl2.ext.sprite.TextureSprite
属性:< / p>
h