bgfx::init() freezes application on MacOS

[MHDtA-dev]

I use SDL2 with bgfx, but on the initialization line (bgfx::init()) my program just freezes and does not work further. This happens with Metal, but if I specify Vulkan, initialization will take place, but the content will not be rendered, and the console will be spammed with such an error:

[mvk-error] VK_NOT_READY: Command buffer cannot accept commands before vkBeginCommandBuffer() is called.

Before that, I tried to use SFML 3.0, but as it turned out, it does not support MoltenVK, and I switched to SDL2. Unfortunately I ran into the same problem. My code:

int windowWidth = 1920;
    int windowHeight = 1080;

    SDL_Init(SDL_INIT_VIDEO);


    SDL_Window* window = SDL_CreateWindow(
            "Renderer",
            SDL_WINDOWPOS_UNDEFINED,
            SDL_WINDOWPOS_UNDEFINED,
            windowWidth,
            windowHeight,
            0
    );

    SDL_SetWindowResizable(window, SDL_TRUE);

    SDL_SysWMinfo wmInfo;
    SDL_VERSION(&wmInfo.version);
    SDL_GetWindowWMInfo(window, &wmInfo);

    bgfx::PlatformData pd;
    pd.nwh = wmInfo.info.cocoa.window;
    bgfx::setPlatformData(pd);

    bgfx::Init bgfxInit;
    bgfxInit.type = bgfx::RendererType::Metal;        //If I put Vulkan, it starts but does not work
    bgfxInit.resolution.width = windowWidth;
    bgfxInit.resolution.height = windowHeight;
    bgfxInit.resolution.reset = BGFX_RESET_VSYNC;
    bgfx::init(bgfxInit);

    bgfx::setViewClear(0, BGFX_CLEAR_COLOR | BGFX_CLEAR_DEPTH, 0x443355FF, 1.0f, 0);
    bgfx::setViewRect(0, 0, 0, windowWidth, windowHeight);

    unsigned int counter = 0;
    SDL_Event e;
    bool bQuit = false;

    while (!bQuit)
    {
        while (SDL_PollEvent(&e) != 0)
        {
            if (e.type == SDL_QUIT) bQuit = true;
        }

        bgfx::frame();
        counter++;
    }

I use Intel Mac, MacOS Monterey

P.S. Before that, I had already written with this problem, but apparently I wrote it in the wrong place. Sorry for that

[bkaradzic]

See how bgfx::Init structure is initialized in examples:

bgfx/examples/01-cubes/cubes.cpp

Lines 147 to 155 in a93a714

	bgfx::Init init;
	init.type = args.m_type;
	init.vendorId = args.m_pciId;
	init.platformData.nwh = entry::getNativeWindowHandle(entry::kDefaultWindowHandle);
	init.platformData.ndt = entry::getNativeDisplayHandle();
	init.resolution.width = m_width;
	init.resolution.height = m_height;
	init.resolution.reset = m_reset;
	bgfx::init(init);

[MHDtA-dev]

I rewrote my Init structure, but unfortunately it didn't have any effect. The program still hangs on the line bgfx::init:

bgfx::Init bgfxInit;
bgfxInit.type = bgfx::RendererType::Count;
bgfxInit.vendorId = BGFX_PCI_ID_NONE;
bgfxInit.platformData.nwh = wmInfo.info.cocoa.window;
bgfxInit.platformData.ndt = NULL;
bgfxInit.resolution.width = windowWidth;
bgfxInit.resolution.height = windowHeight;
bgfxInit.resolution.reset = BGFX_RESET_VSYNC;
bgfx::init(bgfxInit);

[bkaradzic]

Build example, and then verify that examples work fine. If examples work fine on your machine use it as reference, and analyze what example harness does, and compare it with what you do.

[bkaradzic]

It's here: https://github.com/bkaradzic/bgfx/tree/master/examples/common/entry

[MHDtA-dev]

Partially solved. I put bgfx::renderFrame() before bgfx::init(), swapped bgfx::setViewRect() and bgfx::setViewClear() and put bgfx::touch(0) before the main loop, and it worked for Metal. But if I use Vulkan, the error still spams into the console, and the content is rendered.