[D3D12] D3D12Context initialization

src/xenia/gpu/d3d12/d3d12_command_processor.h

@@ -21,8 +21,8 @@ namespace d3d12 {
 
 class D3D12CommandProcessor : public CommandProcessor {
  public:
-  D3D12CommandProcessor(D3D12GraphicsSystem* graphics_system,
-                        kernel::KernelState* kernel_state);
+  explicit D3D12CommandProcessor(D3D12GraphicsSystem* graphics_system,
+                                 kernel::KernelState* kernel_state);
   ~D3D12CommandProcessor();
 
  private:

src/xenia/ui/d3d12/d3d12_api.h

@@ -10,6 +10,9 @@
 #ifndef XENIA_UI_D3D12_D3D12_API_H_
 #define XENIA_UI_D3D12_D3D12_API_H_
 
+// This must be included before D3D and DXGI for things like NOMINMAX.
+#include "xenia/base/platform_win.h"
+
 #include <dxgi1_4.h>
 #include <d3d12.h>
 

src/xenia/ui/d3d12/d3d12_context.cc

@@ -0,0 +1,146 @@
+/**
+ ******************************************************************************
+ * Xenia : Xbox 360 Emulator Research Project                                 *
+ ******************************************************************************
+ * Copyright 2018 Ben Vanik. All rights reserved.                             *
+ * Released under the BSD license - see LICENSE in the root for more details. *
+ ******************************************************************************
+ */
+
+#include "xenia/ui/d3d12/d3d12_context.h"
+
+#include "xenia/base/logging.h"
+#include "xenia/base/math.h"
+#include "xenia/ui/d3d12/d3d12_provider.h"
+#include "xenia/ui/window.h"
+
+namespace xe {
+namespace ui {
+namespace d3d12 {
+
+D3D12Context::D3D12Context(D3D12Provider* provider, Window* target_window)
+    : GraphicsContext(provider, target_window) {}
+
+D3D12Context::~D3D12Context() { Shutdown(); }
+
+bool D3D12Context::Initialize() {
+  auto provider = static_cast<D3D12Provider*>(provider_);
+  auto dxgi_factory = provider->get_dxgi_factory();
+  auto device = provider->get_device();
+
+  context_lost_ = false;
+
+  // Create fences for synchronization of reuse and destruction of transient
+  // objects (like command lists) and for global shutdown.
+  for (uint32_t i = 0; i < kFrameQueueLength; ++i) {
+    auto& fence = fences_[i];
+    if (FAILED(device->CreateFence(0, D3D12_FENCE_FLAG_NONE,
+                                   IID_PPV_ARGS(&fence.fence)))) {
+      XELOGE("Failed to create a frame completion fence");
+      Shutdown();
+      return false;
+    }
+    fence.completion_event = CreateEvent(nullptr, false, false, nullptr);
+    if (fence.completion_event == nullptr) {
+      XELOGE("Failed to create a frame completion event");
+      Shutdown();
+      return false;
+    }
+    fence.queued_value = 0;
+  }
+
+  if (target_window_) {
+    DXGI_SWAP_CHAIN_DESC1 swap_chain_desc;
+    swap_chain_desc.Width = 1280;
+    swap_chain_desc.Height = 720;
+    swap_chain_desc.Format = DXGI_FORMAT_R8G8B8A8_UNORM;
+    swap_chain_desc.Stereo = FALSE;
+    swap_chain_desc.SampleDesc.Count = 1;
+    swap_chain_desc.SampleDesc.Quality = 0;
+    swap_chain_desc.BufferUsage = DXGI_USAGE_RENDER_TARGET_OUTPUT;
+    swap_chain_desc.BufferCount = kSwapChainBufferCount;
+    swap_chain_desc.Scaling = DXGI_SCALING_STRETCH;
+    swap_chain_desc.SwapEffect = DXGI_SWAP_EFFECT_FLIP_DISCARD;
+    swap_chain_desc.AlphaMode = DXGI_ALPHA_MODE_IGNORE;
+    swap_chain_desc.Flags = 0;
+    IDXGISwapChain1* swap_chain_1;
+    if (FAILED(dxgi_factory->CreateSwapChainForHwnd(
+        provider->get_direct_queue(),
+        static_cast<HWND>(target_window_->native_handle()), &swap_chain_desc,
+        nullptr, nullptr, &swap_chain_1))) {
+      XELOGE("Failed to create a DXGI swap chain");
+      Shutdown();
+      return false;
+    }
+    if (FAILED(swap_chain_1->QueryInterface(IID_PPV_ARGS(&swap_chain_)))) {
+      XELOGE("Failed to get version 3 of the DXGI swap chain interface");
+      swap_chain_1->Release();
+      Shutdown();
+      return false;
+    }
+    swap_chain_1->Release();
+    for (uint32_t i = 0; i < kSwapChainBufferCount; ++i) {
+      if (FAILED(swap_chain_->GetBuffer(i,
+          IID_PPV_ARGS(&swap_chain_buffers_[i])))) {
+        XELOGE("Failed to get buffer %u of the swap chain", i);
+        Shutdown();
+        return false;
+      }
+    }
+  }
+
+  initialized_fully_ = true;
+}
+
+void D3D12Context::Shutdown() {
+  if (initialized_fully_) {
+    // TODO(Triang3l): Wait for submitted frame completion.
+  }
+
+  initialized_fully_ = false;
+
+  immediate_drawer_.reset();
+
+  if (swap_chain_ != nullptr) {
+    for (uint32_t i = 0; i < kSwapChainBufferCount; ++i) {
+      auto& buffer = swap_chain_buffers_[i];
+      if (buffer == nullptr) {
+        break;
+      }
+      buffer->Release();
+      buffer = nullptr;
+    }
+    swap_chain_->Release();
+  }
+
+  for (uint32_t i = 0; i < kFrameQueueLength; ++i) {
+    auto& fence = fences_[i];
+    if (fence.fence != nullptr) {
+      fence.fence->Release();
+      fence.fence = nullptr;
+    }
+    if (fence.completion_event != nullptr) {
+      CloseHandle(fence.completion_event);
+      fence.completion_event = nullptr;
+    }
+  }
+}
+
+ImmediateDrawer* D3D12Context::immediate_drawer() {
+  return immediate_drawer_.get();
+}
+
+bool D3D12Context::is_current() { return false; }
+
+bool D3D12Context::MakeCurrent() { return true; }
+
+void D3D12Context::ClearCurrent() {}
+
+std::unique_ptr<RawImage> D3D12Context::Capture() {
+  // TODO(Triang3l): Read back swap chain front buffer.
+  return nullptr;
+}
+
+}  // namespace d3d12
+}  // namespace ui
+}  // namespace xe

src/xenia/ui/d3d12/d3d12_context.h

@@ -0,0 +1,70 @@
+/**
+ ******************************************************************************
+ * Xenia : Xbox 360 Emulator Research Project                                 *
+ ******************************************************************************
+ * Copyright 2018 Ben Vanik. All rights reserved.                             *
+ * Released under the BSD license - see LICENSE in the root for more details. *
+ ******************************************************************************
+ */
+
+#ifndef XENIA_UI_D3D12_D3D12_CONTEXT_H_
+#define XENIA_UI_D3D12_D3D12_CONTEXT_H_
+
+#include "xenia/ui/d3d12/d3d12_api.h"
+#include "xenia/ui/graphics_context.h"
+
+namespace xe {
+namespace ui {
+namespace d3d12 {
+
+class D3D12Context : public GraphicsContext {
+ public:
+  ~D3D12Context() override;
+
+  ImmediateDrawer* immediate_drawer() override;
+
+  bool is_current() override;
+  bool MakeCurrent() override;
+  void ClearCurrent() override;
+
+  bool WasLost() override { return context_lost_; }
+
+  std::unique_ptr<RawImage> Capture() override;
+
+  // The count of copies of transient objects (like command lists, dynamic
+  // descriptor heaps) that must be kept when rendering with this context.
+  static constexpr uint32_t kFrameQueueLength = 3;
+
+ private:
+  friend class D3D12Provider;
+
+  explicit D3D12Context(D3D12Provider* provider, Window* target_window);
+
+ private:
+  bool Initialize();
+  void Shutdown();
+
+  bool initialized_fully_ = false;
+
+  bool context_lost_ = false;
+
+  struct Fence {
+    ID3D12Fence* fence = nullptr;
+    HANDLE completion_event = nullptr;
+    // 0 means the fence signal command hasn't been submitted at all yet.
+    uint64_t queued_value = 0;
+  };
+  Fence fences_[kFrameQueueLength];
+
+  static constexpr uint32_t kSwapChainBufferCount = 3;
+  IDXGISwapChain3* swap_chain_ = nullptr;
+  ID3D12Resource* swap_chain_buffers_[kSwapChainBufferCount] = {};
+
+  std::unique_ptr<D3D12ImmediateDrawer> immediate_drawer_ = nullptr;
+};
+
+}  // namespace d3d12
+}  // namespace ui
+}  // namespace xe
+
+#endif  // XENIA_UI_D3D12_D3D12_CONTEXT_H_

src/xenia/ui/d3d12/d3d12_provider.cc

@@ -11,9 +11,8 @@
 
 #include <gflags/gflags.h>
 
-#include <algorithm>
-
 #include "xenia/base/logging.h"
+#include "xenia/ui/d3d12/d3d12_context.h"
 
 DEFINE_bool(d3d12_debug, false, "Enable Direct3D 12 and DXGI debug layer.");
 DEFINE_int32(d3d12_adapter_index, -1, "Index of the DXGI adapter to use. "
@@ -160,6 +159,25 @@ bool D3D12Provider::IsDeviceSupported(ID3D12Device* device) {
   return !!options.TypedUAVLoadAdditionalFormats;
 }
 
+std::unique_ptr<GraphicsContext> D3D12Provider::CreateContext(
+    Window* target_window) {
+  auto new_context =
+      std::unique_ptr<D3D12Context>(new D3D12Context(this, target_window));
+  if (!new_context->Initialize()) {
+    return nullptr;
+  }
+  return std::unique_ptr<GraphicsContext>(new_context.release());
+}
+
+std::unique_ptr<GraphicsContext> D3D12Provider::CreateOffscreenContext() {
+  auto new_context =
+      std::unique_ptr<D3D12Context>(new D3D12Context(this, nullptr));
+  if (!new_context->Initialize()) {
+    return nullptr;
+  }
+  return std::unique_ptr<GraphicsContext>(new_context.release());
+}
+
 }  // namespace d3d12
 }  // namespace ui
 }  // namespace xe

src/xenia/ui/d3d12/d3d12_provider.h

@@ -25,6 +25,10 @@ class D3D12Provider : public GraphicsProvider {
 
   static std::unique_ptr<D3D12Provider> Create(Window* main_window);
 
+  std::unique_ptr<GraphicsContext> CreateContext(
+      Window* target_window) override;
+  std::unique_ptr<GraphicsContext> CreateOffscreenContext() override;
+
   IDXGIFactory2* get_dxgi_factory() const { return dxgi_factory_; }
   ID3D12Device* get_device() const { return device_; }
   ID3D12CommandQueue* get_direct_queue() const { return direct_queue_; }