Blocks the thread until a swapchain texture is available to be acquired.
Defined in <SDL3/SDL_gpu.h>
bool SDL_WaitForGPUSwapchain(
    SDL_GPUDevice *device,
    SDL_Window *window);| SDL_GPUDevice * | device | a GPU context. | 
| SDL_Window * | window | a window that has been claimed. | 
(bool) Returns true on success, false on failure; call SDL_GetError() for more information.
This function should only be called from the thread that created the window.
This function is available since SDL 3.2.0.