Function SDL_LockTexture 

pub unsafe extern "C" fn SDL_LockTexture(
    texture: *mut SDL_Texture,
    rect: *const SDL_Rect,
    pixels: *mut *mut c_void,
    pitch: *mut c_int,
) -> bool

Lock a portion of the texture for write-only pixel access.

As an optimization, the pixels made available for editing don’t necessarily contain the old texture data. This is a write-only operation, and if you need to keep a copy of the texture data you should do that at the application level.

You must use SDL_UnlockTexture() to unlock the pixels and apply any changes.

Parameter: texture the texture to lock for access, which was created with SDL_TEXTUREACCESS_STREAMING. Parameter: rect an SDL_Rect structure representing the area to lock for access; NULL to lock the entire texture. Parameter: pixels this is filled in with a pointer to the locked pixels, appropriately offset by the locked area. Parameter: pitch this is filled in with the pitch of the locked pixels; the pitch is the length of one row in bytes. Returns: true on success or false if the texture is not valid or was not created with SDL_TEXTUREACCESS_STREAMING; call SDL_GetError() for more information.

Thread Safety: This function should only be called on the main thread.

Available Since: This function is available since SDL 3.2.0.

See Also: SDL_LockTextureToSurface See Also: SDL_UnlockTexture