SDL_SetGPUAllowedFramesInFlight - Man Page

Defined in SDL3/SDL_gpu.h

#include "SDL3/SDL.h"

bool SDL_SetGPUAllowedFramesInFlight(
    SDL_GPUDevice *device,
    Uint32 allowed_frames_in_flight);

The default value when the device is created is 2. This means that after you have submitted 2 frames for presentation, if the GPU has not finished working on the first frame,

SDL_AcquireGPUSwapchainTexture () will fill the swapchain texture pointer with NULL, and

SDL_WaitAndAcquireGPUSwapchainTexture () will block.

Higher values increase throughput at the expense of visual latency. Lower values decrease visual latency at the expense of throughput.

Note that calling this function will stall and flush the command queue to prevent synchronization issues.

The minimum value of allowed frames in flight is 1, and the maximum is 3.

device

a GPU context.

allowed_frames_in_flight

the maximum number of frames that can be pending on the GPU.

Returns true if successful, false on error; call

SDL_GetError () for more information.

This function is available since SDL 3.2.0.

SDL_AcquireGPUSwapchainTexture(3), SDL_WaitForGPUSwapchain(3).