Performs a buffer-to-buffer copy.
Defined in <SDL3/SDL_gpu.h>
void SDL_CopyGPUBufferToBuffer(
    SDL_GPUCopyPass *copy_pass,
    const SDL_GPUBufferLocation *source,
    const SDL_GPUBufferLocation *destination,
    Uint32 size,
    bool cycle);| SDL_GPUCopyPass * | copy_pass | a copy pass handle. | 
| const SDL_GPUBufferLocation * | source | the buffer and offset to copy from. | 
| const SDL_GPUBufferLocation * | destination | the buffer and offset to copy to. | 
| Uint32 | size | the length of the buffer to copy. | 
| bool | cycle | if true, cycles the destination buffer if it is already bound, otherwise overwrites the data. | 
This copy occurs on the GPU timeline. You may assume the copy has finished in subsequent commands.
This function is available since SDL 3.2.0.