如何使用 PySDL2 将SDL_Surface传递给SDL_LockTexture

Question

我正在尝试将SDL_Surface成员传递给SDL_LockTexture：

texture = SDL_CreateTexture(renderer, SDL_PIXELFORMAT_ARGB8888, SDL_TEXTUREACCESS_STREAMING, width, height)
surface = SDL_CreateRGBSurface(0, width, height, 32, 0x00FF0000, 0x0000FF00, 0x000000FF, 0xFF000000)
SDL_LockTexture(texture, 0, ctypes.byref(surface.contents.pixels), ctypes.byref(surface.contents.pitch))
TypeError: byref() argument must be a ctypes instance, not 'int'

SDL_Surface定义如下：surface.py

...
class SDL_Surface(Structure):
_fields_ = [
            ...
            ("pitch", c_int),
            ("pixels", c_void_p),
            ...
...

SDL_LockTexture定义如下：render.py

SDL_LockTexture = _bind("SDL_LockTexture", [POINTER(SDL_Texture), POINTER(SDL_Rect), POINTER(c_void_p), POINTER(c_int)], c_int)

调用SDL_CreateRGBSurface后，调试器说图面的像素和间距成员都是 int 类型。我做错了什么？

Answer 1

我遇到了同样的问题，试图将像素传递到PyOpenGL函数中。由于某种原因，该字段存储为 int 。您需要将其转换为void pointer。尝试：

SDL_LockTexture(texture, 0, ctypes.byref(ctypes.c_void_p(surface.contents.pixels)), ctypes.byref(ctypes.c_int(surface.contents.pitch))