ensure_capture_state()

void MayaFlux::Core::BackendWindowHandler::ensure_capture_state ( WindowRenderContext &  ctx )

private

Ensure capture state is initialized for a window context.

Parameters

ctx	Window render context to initialize capture state for

If the context does not already have capture state and the associated window has capture enabled, this initializes the capture state including allocating command buffers and synchronization objects for readback.

Definition at line 888 of file BackendWindowHandler.cpp.

{
    if (ctx.capture || !ctx.swapchain || !ctx.window->is_capture_enabled())
        return;
 
    auto dev = m_context.get_device();
    const vk::Format fmt = ctx.swapchain->get_image_format();
    const uint32_t bpp = Core::vk_format_bytes_per_pixel(fmt);
 
    ctx.capture = std::make_unique<CaptureState>();
    ctx.capture->format = fmt;
    ctx.capture->bpp = bpp;
 
    const uint32_t count = ctx.swapchain->get_image_count();
    ctx.capture->slots.reserve(count);
    for (uint32_t i = 0; i < count; ++i) {
        auto slot = std::make_unique<CaptureSlot>();
        slot->cmd = m_command_manager.allocate_command_buffer(
            vk::CommandBufferLevel::ePrimary);
        slot->fence = dev.createFence({});
        ctx.capture->slots.push_back(std::move(slot));
    }
 
    start_readback_thread(*ctx.capture, dev);
}

References MayaFlux::Core::WindowRenderContext::capture, count, MayaFlux::Core::WindowRenderContext::swapchain, MayaFlux::Core::vk_format_bytes_per_pixel(), and MayaFlux::Core::WindowRenderContext::window.

Referenced by setup_backend_service().

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