present()

bool MayaFlux::Core::VKSwapchain::present	(	uint32_t	image_index,
		vk::Semaphore	wait_semaphore,
		vk::Queue	present_queue = nullptr
	)

Present image to screen.

Parameters

image_index	Index of image to present
wait_semaphore	Semaphore to wait on before presenting
present_queue	Queue to submit present operation to (optional, uses context's graphics queue if null)

Returns

True if present succeeded, false if swapchain out of date

Definition at line 218 of file VKSwapchain.cpp.

{
    if (!m_context) {
        MF_RT_ERROR(Journal::Component::Core, Journal::Context::GraphicsBackend,
            "Cannot present: no context set");
        return false;
    }
 
    vk::Queue queue = present_queue ? present_queue : m_context->get_graphics_queue();
 
    vk::PresentInfoKHR present_info {};
    present_info.waitSemaphoreCount = 1;
    present_info.pWaitSemaphores = &wait_semaphore;
 
    present_info.swapchainCount = 1;
    present_info.pSwapchains = &m_swapchain;
    present_info.pImageIndices = &image_index;
    present_info.pResults = nullptr;
 
    try {
        auto result = queue.presentKHR(present_info);
 
        if (result == vk::Result::eErrorOutOfDateKHR || result == vk::Result::eSuboptimalKHR) {
            return false;
        }
 
        if (result != vk::Result::eSuccess) {
            MF_RT_ERROR(Journal::Component::Core, Journal::Context::GraphicsBackend,
                "Failed to present swapchain image");
            return false;
        }
 
        return true;
 
    } catch (const vk::SystemError& e) {
        MF_RT_ERROR(Journal::Component::Core, Journal::Context::GraphicsBackend,
            "Exception presenting swapchain image: {}", e.what());
        return false;
    }
}

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

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