Add D3DCommon (shared code between D3D11 and D3D12)

1 files changed, 232 insertions, 0 deletions

diff --git a/Source/Core/VideoBackends/D3DCommon/SwapChain.cpp b/Source/Core/VideoBackends/D3DCommon/SwapChain.cpp
new file mode 100644
index 0000000000..376f891a96
--- /dev/null
+++ b/Source/Core/VideoBackends/D3DCommon/SwapChain.cpp
@@ -0,0 +1,232 @@
+// Copyright 2019 Dolphin Emulator Project
+// Licensed under GPLv2+
+// Refer to the license.txt file included.
+
+#include "VideoBackends/D3DCommon/SwapChain.h"
+
+#include <algorithm>
+#include <cstdint>
+
+#include "Common/Assert.h"
+#include "Common/CommonFuncs.h"
+#include "Common/Logging/Log.h"
+#include "Common/MsgHandler.h"
+#include "VideoCommon/VideoConfig.h"
+
+static bool IsTearingSupported(IDXGIFactory2* dxgi_factory)
+{
+  Microsoft::WRL::ComPtr<IDXGIFactory5> factory5;
+  if (FAILED(dxgi_factory->QueryInterface(IID_PPV_ARGS(&factory5))))
+    return false;
+
+  UINT allow_tearing = 0;
+  return SUCCEEDED(factory5->CheckFeatureSupport(DXGI_FEATURE_PRESENT_ALLOW_TEARING, &allow_tearing,
+                                                 sizeof(allow_tearing))) &&
+         allow_tearing != 0;
+}
+
+static bool GetFullscreenState(IDXGISwapChain1* swap_chain)
+{
+  BOOL fs = FALSE;
+  return SUCCEEDED(swap_chain->GetFullscreenState(&fs, nullptr)) && fs;
+}
+
+namespace D3DCommon
+{
+SwapChain::SwapChain(const WindowSystemInfo& wsi, IDXGIFactory2* dxgi_factory, IUnknown* d3d_device)
+    : m_wsi(wsi), m_dxgi_factory(dxgi_factory), m_d3d_device(d3d_device),
+      m_allow_tearing_supported(IsTearingSupported(dxgi_factory))
+{
+}
+
+SwapChain::~SwapChain()
+{
+  // Can't destroy swap chain while it's fullscreen.
+  if (m_swap_chain && GetFullscreenState(m_swap_chain.Get()))
+    m_swap_chain->SetFullscreenState(FALSE, nullptr);
+}
+
+bool SwapChain::WantsStereo()
+{
+  return g_ActiveConfig.stereo_mode == StereoMode::QuadBuffer;
+}
+
+u32 SwapChain::GetSwapChainFlags() const
+{
+  // This flag is necessary if we want to use a flip-model swapchain without locking the framerate
+  return m_allow_tearing_supported ? DXGI_SWAP_CHAIN_FLAG_ALLOW_TEARING : 0;
+}
+
+bool SwapChain::CreateSwapChain(bool stereo)
+{
+  RECT client_rc;
+  if (GetClientRect(static_cast<HWND>(m_wsi.render_surface), &client_rc))
+  {
+    m_width = client_rc.right - client_rc.left;
+    m_height = client_rc.bottom - client_rc.top;
+  }
+
+  DXGI_SWAP_CHAIN_DESC1 swap_chain_desc = {};
+  swap_chain_desc.Width = m_width;
+  swap_chain_desc.Height = m_height;
+  swap_chain_desc.BufferCount = SWAP_CHAIN_BUFFER_COUNT;
+  swap_chain_desc.BufferUsage = DXGI_USAGE_RENDER_TARGET_OUTPUT;
+  swap_chain_desc.SampleDesc.Count = 1;
+  swap_chain_desc.SampleDesc.Quality = 0;
+  swap_chain_desc.Format = GetDXGIFormatForAbstractFormat(m_texture_format, false);
+  swap_chain_desc.Scaling = DXGI_SCALING_STRETCH;
+  swap_chain_desc.SwapEffect = DXGI_SWAP_EFFECT_FLIP_DISCARD;
+  swap_chain_desc.Stereo = stereo;
+  swap_chain_desc.Flags = GetSwapChainFlags();
+
+  HRESULT hr = m_dxgi_factory->CreateSwapChainForHwnd(
+      m_d3d_device.Get(), static_cast<HWND>(m_wsi.render_surface), &swap_chain_desc, nullptr,
+      nullptr, &m_swap_chain);
+  if (FAILED(hr))
+  {
+    // Flip-model discard swapchains aren't supported on Windows 8, so here we fall back to
+    // a sequential swapchain
+    swap_chain_desc.SwapEffect = DXGI_SWAP_EFFECT_FLIP_SEQUENTIAL;
+    hr = m_dxgi_factory->CreateSwapChainForHwnd(m_d3d_device.Get(),
+                                                static_cast<HWND>(m_wsi.render_surface),
+                                                &swap_chain_desc, nullptr, nullptr, &m_swap_chain);
+  }
+
+  if (FAILED(hr))
+  {
+    // Flip-model swapchains aren't supported on Windows 7, so here we fall back to a legacy
+    // BitBlt-model swapchain
+    swap_chain_desc.SwapEffect = DXGI_SWAP_EFFECT_DISCARD;
+    hr = m_dxgi_factory->CreateSwapChainForHwnd(m_d3d_device.Get(),
+                                                static_cast<HWND>(m_wsi.render_surface),
+                                                &swap_chain_desc, nullptr, nullptr, &m_swap_chain);
+  }
+
+  if (FAILED(hr))
+  {
+    PanicAlert("Failed to create swap chain with HRESULT %08X", hr);
+    return false;
+  }
+
+  // We handle fullscreen ourselves.
+  hr = m_dxgi_factory->MakeWindowAssociation(static_cast<HWND>(m_wsi.render_surface),
+                                             DXGI_MWA_NO_WINDOW_CHANGES | DXGI_MWA_NO_ALT_ENTER);
+  if (FAILED(hr))
+    WARN_LOG(VIDEO, "MakeWindowAssociation() failed with HRESULT %08X", hr);
+
+  m_stereo = stereo;
+  if (!CreateSwapChainBuffers())
+  {
+    PanicAlert("Failed to create swap chain buffers");
+    DestroySwapChainBuffers();
+    m_swap_chain.Reset();
+    return false;
+  }
+
+  return true;
+}
+
+void SwapChain::DestroySwapChain()
+{
+  DestroySwapChainBuffers();
+
+  // Can't destroy swap chain while it's fullscreen.
+  if (m_swap_chain && GetFullscreenState(m_swap_chain.Get()))
+    m_swap_chain->SetFullscreenState(FALSE, nullptr);
+
+  m_swap_chain.Reset();
+}
+
+bool SwapChain::ResizeSwapChain()
+{
+  DestroySwapChainBuffers();
+
+  HRESULT hr = m_swap_chain->ResizeBuffers(SWAP_CHAIN_BUFFER_COUNT, 0, 0,
+                                           GetDXGIFormatForAbstractFormat(m_texture_format, false),
+                                           GetSwapChainFlags());
+  if (FAILED(hr))
+    WARN_LOG(VIDEO, "ResizeBuffers() failed with HRESULT %08X", hr);
+
+  DXGI_SWAP_CHAIN_DESC1 desc;
+  if (SUCCEEDED(m_swap_chain->GetDesc1(&desc)))
+  {
+    m_width = desc.Width;
+    m_height = desc.Height;
+  }
+
+  return CreateSwapChainBuffers();
+}
+
+void SwapChain::SetStereo(bool stereo)
+{
+  if (m_stereo == stereo)
+    return;
+
+  DestroySwapChain();
+  if (!CreateSwapChain(stereo))
+  {
+    PanicAlert("Failed to switch swap chain stereo mode");
+    CreateSwapChain(false);
+  }
+}
+
+bool SwapChain::GetFullscreen() const
+{
+  return GetFullscreenState(m_swap_chain.Get());
+}
+
+void SwapChain::SetFullscreen(bool request)
+{
+  m_swap_chain->SetFullscreenState(request, nullptr);
+}
+
+bool SwapChain::CheckForFullscreenChange()
+{
+  if (m_fullscreen_request != m_has_fullscreen)
+  {
+    HRESULT hr = m_swap_chain->SetFullscreenState(m_fullscreen_request, nullptr);
+    if (SUCCEEDED(hr))
+    {
+      m_has_fullscreen = m_fullscreen_request;
+      return true;
+    }
+  }
+
+  const bool new_fullscreen_state = GetFullscreenState(m_swap_chain.Get());
+  if (new_fullscreen_state != m_has_fullscreen)
+  {
+    m_has_fullscreen = new_fullscreen_state;
+    m_fullscreen_request = new_fullscreen_state;
+    return true;
+  }
+
+  return false;
+}
+
+bool SwapChain::Present()
+{
+  // When using sync interval 0, it is recommended to always pass the tearing flag when it is
+  // supported, even when presenting in windowed mode. However, this flag cannot be used if the app
+  // is in fullscreen mode as a result of calling SetFullscreenState.
+  UINT present_flags = 0;
+  if (m_allow_tearing_supported && !g_ActiveConfig.bVSyncActive && !m_has_fullscreen)
+    present_flags |= DXGI_PRESENT_ALLOW_TEARING;
+
+  HRESULT hr = m_swap_chain->Present(static_cast<UINT>(g_ActiveConfig.bVSyncActive), present_flags);
+  if (FAILED(hr))
+  {
+    WARN_LOG(VIDEO, "Swap chain present failed with HRESULT %08X", hr);
+    return false;
+  }
+
+  return true;
+}
+
+bool SwapChain::ChangeSurface(void* native_handle)
+{
+  DestroySwapChain();
+  m_wsi.render_surface = native_handle;
+  return CreateSwapChain(m_stereo);
+}
+
+}  // namespace D3DCommon