dxvk/src/dxgi/dxgi_swapchain.cpp

#include "dxgi_factory.h"
#include "dxgi_resource.h"
#include "dxgi_swapchain.h"

namespace dxvk {
  
  DxgiSwapChain::DxgiSwapChain(
          DxgiFactory*          factory,
          IUnknown*             pDevice,
          DXGI_SWAP_CHAIN_DESC* pDesc)
  : m_factory (factory),
    m_desc    (*pDesc) {
    
    // Retrieve a device pointer that allows us to
    // communicate with the underlying D3D device
    if (FAILED(pDevice->QueryInterface(__uuidof(IDXGIPresentDevicePrivate),
        reinterpret_cast<void**>(&m_presentDevice))))
      throw DxvkError("DxgiSwapChain::DxgiSwapChain: Invalid device");
    
    // Retrieve the adapter, which is going
    // to be used to enumerate displays.
    Com<IDXGIAdapter> adapter;
    
    if (FAILED(pDevice->QueryInterface(__uuidof(IDXGIDevicePrivate),
        reinterpret_cast<void**>(&m_device))))
      throw DxvkError("DxgiSwapChain::DxgiSwapChain: Invalid device");
    
    if (FAILED(m_device->GetAdapter(&adapter))
     || FAILED(adapter->QueryInterface(__uuidof(IDXGIAdapterPrivate),
        reinterpret_cast<void**>(&m_adapter))))
      throw DxvkError("DxgiSwapChain::DxgiSwapChain: Failed to retrieve adapter");
    
    // Initialize frame statistics
    m_stats.PresentCount         = 0;
    m_stats.PresentRefreshCount  = 0;
    m_stats.SyncRefreshCount     = 0;
    m_stats.SyncQPCTime.QuadPart = 0;
    m_stats.SyncGPUTime.QuadPart = 0;
    
    // Adjust initial back buffer size. If zero, these
    // shall be set to the current window size.
    VkExtent2D windowSize = this->getWindowSize();
    
    if (m_desc.BufferDesc.Width  == 0) m_desc.BufferDesc.Width  = windowSize.width;
    if (m_desc.BufferDesc.Height == 0) m_desc.BufferDesc.Height = windowSize.height;
    
    // Set initial window mode and fullscreen state
//     if (FAILED(this->SetFullscreenState(!pDesc->Windowed, nullptr)))
//       throw DxvkError("DxgiSwapChain::DxgiSwapChain: Failed to set initial fullscreen state");
    
    this->createPresenter();
    this->createBackBuffer();
  }
  
  
  DxgiSwapChain::~DxgiSwapChain() {
    // We do not release the SDL window handle here since
    // that would destroy the underlying window as well.
  }
  
  
  HRESULT DxgiSwapChain::QueryInterface(REFIID riid, void** ppvObject) {
    COM_QUERY_IFACE(riid, ppvObject, IUnknown);
    COM_QUERY_IFACE(riid, ppvObject, IDXGIObject);
    COM_QUERY_IFACE(riid, ppvObject, IDXGIDeviceSubObject);
    COM_QUERY_IFACE(riid, ppvObject, IDXGISwapChain);
    
    Logger::warn("DxgiSwapChain::QueryInterface: Unknown interface query");
    return E_NOINTERFACE;
  }
  
  
  HRESULT DxgiSwapChain::GetParent(REFIID riid, void** ppParent) {
    return m_factory->QueryInterface(riid, ppParent);
  }
  
  
  HRESULT DxgiSwapChain::GetDevice(REFIID riid, void** ppDevice) {
    return m_device->QueryInterface(riid, ppDevice);
  }
  
  
  HRESULT DxgiSwapChain::GetBuffer(UINT Buffer, REFIID riid, void** ppSurface) {
    std::lock_guard<std::mutex> lock(m_mutex);
    
    if (Buffer > 0) {
      Logger::err("DxgiSwapChain::GetBuffer: Buffer > 0 not supported");
      return DXGI_ERROR_INVALID_CALL;
    }
    
    return m_backBufferIface->QueryInterface(riid, ppSurface);
  }
  
  
  HRESULT DxgiSwapChain::GetContainingOutput(IDXGIOutput** ppOutput) {
    if (ppOutput != nullptr)
      return DXGI_ERROR_INVALID_CALL;
    
    std::lock_guard<std::mutex> lock(m_mutex);
    Logger::err("DxgiSwapChain::GetContainingOutput: Not implemented yet");
    return E_NOTIMPL;
  }
  
  
  HRESULT DxgiSwapChain::GetDesc(DXGI_SWAP_CHAIN_DESC* pDesc) {
    if (pDesc == nullptr)
      return DXGI_ERROR_INVALID_CALL;
    
    std::lock_guard<std::mutex> lock(m_mutex);
    *pDesc = m_desc;
    return S_OK;
  }
  
  
  HRESULT DxgiSwapChain::GetFrameStatistics(DXGI_FRAME_STATISTICS* pStats) {
    if (pStats == nullptr)
      return DXGI_ERROR_INVALID_CALL;
    
    std::lock_guard<std::mutex> lock(m_mutex);
    *pStats = m_stats;
    return S_OK;
  }
  
  
  HRESULT DxgiSwapChain::GetFullscreenState(
          BOOL*         pFullscreen,
          IDXGIOutput** ppTarget) {
    std::lock_guard<std::mutex> lock(m_mutex);
    
    HRESULT hr = S_OK;
    
    if (pFullscreen != nullptr)
      *pFullscreen = !m_desc.Windowed;
    
    if ((ppTarget != nullptr) && !m_desc.Windowed)
      hr = this->GetContainingOutput(ppTarget);
    
    return hr;
  }
  
  
  HRESULT DxgiSwapChain::GetLastPresentCount(UINT* pLastPresentCount) {
    if (pLastPresentCount == nullptr)
      return DXGI_ERROR_INVALID_CALL;
    
    std::lock_guard<std::mutex> lock(m_mutex);
    *pLastPresentCount = m_stats.PresentCount;
    return S_OK;
  }
  
  
  HRESULT DxgiSwapChain::Present(UINT SyncInterval, UINT Flags) {
    std::lock_guard<std::mutex> lock(m_mutex);
    
    try {
      // Submit pending rendering commands
      // before recording the present code.
      m_presentDevice->FlushRenderingCommands();
    
      // TODO implement sync interval
      // TODO implement flags
      m_presenter->presentImage(m_backBufferView);
      return S_OK;
    } catch (const DxvkError& err) {
      Logger::err(err.message());
      return DXGI_ERROR_DRIVER_INTERNAL_ERROR;
    }
  }
  
  
  HRESULT DxgiSwapChain::ResizeBuffers(
          UINT        BufferCount,
          UINT        Width,
          UINT        Height,
          DXGI_FORMAT NewFormat,
          UINT        SwapChainFlags) {
    std::lock_guard<std::mutex> lock(m_mutex);
    
    VkExtent2D windowSize = this->getWindowSize();
    
    m_desc.BufferDesc.Width = Width != 0 ? Width : windowSize.width;
    m_desc.BufferDesc.Height = Height != 0 ? Height : windowSize.height;
    
    m_desc.Flags = SwapChainFlags;
    
    if (BufferCount != 0)
      m_desc.BufferCount = BufferCount;
    
    if (NewFormat != DXGI_FORMAT_UNKNOWN)
      m_desc.BufferDesc.Format = NewFormat;
    
    try {
      m_presenter->recreateSwapchain(
        m_desc.BufferDesc.Width,
        m_desc.BufferDesc.Height,
        m_desc.BufferDesc.Format);
      this->createBackBuffer();
      return S_OK;
    } catch (const DxvkError& err) {
      Logger::err(err.message());
      return DXGI_ERROR_DRIVER_INTERNAL_ERROR;
    }
  }
  
  
  HRESULT DxgiSwapChain::ResizeTarget(const DXGI_MODE_DESC* pNewTargetParameters) {
    if (pNewTargetParameters == nullptr)
      return DXGI_ERROR_INVALID_CALL;
    
    std::lock_guard<std::mutex> lock(m_mutex);
    
    // Applies to windowed mode
    RECT newRect;
    RECT oldRect;
    
    ::SetRect(&newRect, 0, 0,
      pNewTargetParameters->Width,
      pNewTargetParameters->Height);
    ::AdjustWindowRectEx(&newRect,
      GetWindowLongW(m_desc.OutputWindow, GWL_STYLE), FALSE,
      GetWindowLongW(m_desc.OutputWindow, GWL_EXSTYLE));
    ::SetRect(&newRect, 0, 0,
      newRect.right - newRect.left,
      newRect.bottom - newRect.top);
    ::GetWindowRect(m_desc.OutputWindow, &oldRect);
    ::OffsetRect(&newRect, oldRect.left, oldRect.top);
    
    // TODO implement fullscreen mode
    
    ::MoveWindow(m_desc.OutputWindow,
      newRect.left, newRect.top,
      newRect.right - newRect.left,
      newRect.bottom - newRect.top, TRUE);
    
    try {
      m_presenter->recreateSwapchain(
        m_desc.BufferDesc.Width,
        m_desc.BufferDesc.Height,
        m_desc.BufferDesc.Format);
      return S_OK;
    } catch (const DxvkError& e) {
      Logger::err(e.message());
      return DXGI_ERROR_DRIVER_INTERNAL_ERROR;
    }
  }
  
  
  HRESULT DxgiSwapChain::SetFullscreenState(
          BOOL          Fullscreen,
          IDXGIOutput*  pTarget) {
    std::lock_guard<std::mutex> lock(m_mutex);
    
    Logger::err("DxgiSwapChain::SetFullscreenState: Not implemented yet");
    return E_NOTIMPL;
  }
  
  
  void DxgiSwapChain::createPresenter() {
    m_presenter = new DxgiPresenter(
      m_device->GetDXVKDevice(),
      m_desc.OutputWindow,
      m_desc.BufferDesc.Width,
      m_desc.BufferDesc.Height,
      m_desc.BufferDesc.Format);
  }
  
  
  void DxgiSwapChain::createBackBuffer() {
    // Pick the back buffer format based on the requested swap chain format
    DxgiFormatPair bufferFormat = m_adapter->LookupFormat(m_desc.BufferDesc.Format);
    Logger::info(str::format("DxgiSwapChain: Creating back buffer with ", bufferFormat.actual));
    
    // TODO support proper multi-sampling
    const Rc<DxvkDevice> dxvkDevice = m_device->GetDXVKDevice();
    
    // Create an image that can be rendered to
    // and that can be used as a sampled texture.
    Com<IDXGIImageResourcePrivate> resource;
    
    DxvkImageCreateInfo imageInfo;
    imageInfo.type          = VK_IMAGE_TYPE_2D;
    imageInfo.format        = bufferFormat.actual;
    imageInfo.flags         = VK_IMAGE_CREATE_MUTABLE_FORMAT_BIT;
    imageInfo.sampleCount   = VK_SAMPLE_COUNT_1_BIT;
    imageInfo.extent.width  = m_desc.BufferDesc.Width;
    imageInfo.extent.height = m_desc.BufferDesc.Height;
    imageInfo.extent.depth  = 1;
    imageInfo.numLayers     = 1;
    imageInfo.mipLevels     = 1;
    imageInfo.usage         = VK_IMAGE_USAGE_COLOR_ATTACHMENT_BIT
                            | VK_IMAGE_USAGE_SAMPLED_BIT
                            | VK_IMAGE_USAGE_TRANSFER_DST_BIT
                            | VK_IMAGE_USAGE_TRANSFER_SRC_BIT;
    imageInfo.stages        = VK_PIPELINE_STAGE_VERTEX_SHADER_BIT
                            | VK_PIPELINE_STAGE_FRAGMENT_SHADER_BIT
                            | VK_PIPELINE_STAGE_COMPUTE_SHADER_BIT
                            | VK_PIPELINE_STAGE_COLOR_ATTACHMENT_OUTPUT_BIT
                            | VK_PIPELINE_STAGE_TRANSFER_BIT;
    imageInfo.access        = VK_ACCESS_COLOR_ATTACHMENT_WRITE_BIT
                            | VK_ACCESS_COLOR_ATTACHMENT_READ_BIT
                            | VK_ACCESS_TRANSFER_WRITE_BIT
                            | VK_ACCESS_TRANSFER_READ_BIT
                            | VK_ACCESS_SHADER_READ_BIT;
    imageInfo.tiling        = VK_IMAGE_TILING_OPTIMAL;
    imageInfo.layout        = VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL;
    
    if (dxvkDevice->features().geometryShader)
      imageInfo.stages      |= VK_PIPELINE_STAGE_GEOMETRY_SHADER_BIT;
    
    if (dxvkDevice->features().tessellationShader) {
      imageInfo.stages      |= VK_PIPELINE_STAGE_TESSELLATION_CONTROL_SHADER_BIT
                            |  VK_PIPELINE_STAGE_TESSELLATION_EVALUATION_SHADER_BIT;
    }
    
    if (FAILED(DXGICreateImageResourcePrivate(m_device.ptr(), &imageInfo,
          VK_MEMORY_PROPERTY_DEVICE_LOCAL_BIT, DXGI_USAGE_BACK_BUFFER | m_desc.BufferUsage,
          &resource)))
      throw DxvkError("DxgiSwapChain::createBackBuffer: Failed to create back buffer");
      
    m_backBuffer = resource->GetDXVKImage();
    
    // Create an image view that allows the
    // image to be bound as a shader resource.
    DxvkImageViewCreateInfo viewInfo;
    viewInfo.type       = VK_IMAGE_VIEW_TYPE_2D;
    viewInfo.format     = imageInfo.format;
    viewInfo.aspect     = VK_IMAGE_ASPECT_COLOR_BIT;
    viewInfo.minLevel   = 0;
    viewInfo.numLevels  = 1;
    viewInfo.minLayer   = 0;
    viewInfo.numLayers  = 1;
    
    m_backBufferView = dxvkDevice->createImageView(m_backBuffer, viewInfo);
    
    // Wrap the back buffer image into an interface
    // that the device can use to access the image.
    if (FAILED(m_presentDevice->WrapSwapChainBackBuffer(resource.ptr(), &m_desc, &m_backBufferIface)))
      throw DxvkError("DxgiSwapChain::createBackBuffer: Failed to create back buffer interface");
    
    // Initialize the image properly so that
    // it can be used in a DXVK context
    m_presenter->initBackBuffer(m_backBuffer);
  }
  
  
  VkExtent2D DxgiSwapChain::getWindowSize() const {
    RECT rect;
    
    if (::GetClientRect(m_desc.OutputWindow, &rect)) {
      VkExtent2D result;
      result.width  = rect.right - rect.left;
      result.height = rect.bottom - rect.top;
      return result;
    }
    
    throw DxvkError("DxgiSwapChain::getWindowSize: Failed to get window rect");
  }
  
}