acquire_next_image()

std::optional< uint32_t > MayaFlux::Core::VKSwapchain::acquire_next_image	(	vk::Semaphore	signal_semaphore,
		uint64_t	timeout_ns = UINT64_MAX
	)

Acquire next image from swapchain.

Parameters

signal_semaphore	Semaphore to signal when image is acquired
timeout_ns	Timeout in nanoseconds (UINT64_MAX = no timeout)

Returns

Image index, or empty if acquisition failed

Definition at line 187 of file VKSwapchain.cpp.

{
    if (!m_context) {
        MF_RT_ERROR(Journal::Component::Core, Journal::Context::GraphicsBackend,
            "Cannot acquire image: no context set");
        return std::nullopt;
    }
 
    vk::Device device = m_context->get_device();
 
    try {
        auto result = device.acquireNextImageKHR(
            m_swapchain,
            timeout_ns,
            signal_semaphore,
            nullptr);
 
        if (result.result == vk::Result::eErrorOutOfDateKHR) {
            return std::nullopt;
        }
 
        if (result.result != vk::Result::eSuccess && result.result != vk::Result::eSuboptimalKHR) {
            MF_RT_ERROR(Journal::Component::Core, Journal::Context::GraphicsBackend,
                "Failed to acquire swapchain image");
            return std::nullopt;
        }
 
        return result.value;
 
    } catch (const vk::SystemError& e) {
        MF_RT_ERROR(Journal::Component::Core, Journal::Context::GraphicsBackend,
            "Exception acquiring swapchain image: {}", e.what());
        return std::nullopt;
    }
}

References MayaFlux::Journal::Core, MayaFlux::Core::VKContext::get_device(), MayaFlux::Journal::GraphicsBackend, m_context, m_swapchain, and MF_RT_ERROR.

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