From 5d7e98c4be398b1a36a883efcffc6c15d53bdf56 Mon Sep 17 00:00:00 2001
From: Joshua Goins <josh@redstrate.com>
Date: Mon, 21 Feb 2022 16:32:05 -0500
Subject: [PATCH] Enumerate devices on DX12

---
 engine/gfx/dx12/CMakeLists.txt       |  2 +-
 engine/gfx/dx12/include/gfx_dx12.hpp | 12 ++++++++++++
 engine/gfx/dx12/src/gfx_dx12.cpp     | 25 +++++++++++++++++++++++--
 3 files changed, 36 insertions(+), 3 deletions(-)

diff --git a/engine/gfx/dx12/CMakeLists.txt b/engine/gfx/dx12/CMakeLists.txt
index d2f0fe5..d11cd05 100755
--- a/engine/gfx/dx12/CMakeLists.txt
+++ b/engine/gfx/dx12/CMakeLists.txt
@@ -1,3 +1,3 @@
 add_library(GFXDX12 STATIC src/gfx_dx12.cpp)
 target_include_directories(GFXDX12 PUBLIC include)
-target_link_libraries(GFXDX12 PUBLIC GFX)
\ No newline at end of file
+target_link_libraries(GFXDX12 PUBLIC GFX d3d12.lib dxgi.lib)
\ No newline at end of file
diff --git a/engine/gfx/dx12/include/gfx_dx12.hpp b/engine/gfx/dx12/include/gfx_dx12.hpp
index 64f7e89..26b7ff2 100755
--- a/engine/gfx/dx12/include/gfx_dx12.hpp
+++ b/engine/gfx/dx12/include/gfx_dx12.hpp
@@ -1,7 +1,14 @@
 #pragma once
 
+#include <d3d12.h>
+#include <dxgi1_6.h>
+#include <d3dcompiler.h>
+#include <wrl.h>
+
 #include "gfx.hpp"
 
+using namespace Microsoft::WRL;
+
 class gfx_dx12 : public GFX {
 public:
     bool is_supported() override { return true; }
@@ -10,4 +17,9 @@ public:
     bool initialize(const GFXCreateInfo& info) override;
     
     const char* get_name() override;
+
+private:
+    void get_device();
+
+    ComPtr<ID3D12Device> device;
 };
diff --git a/engine/gfx/dx12/src/gfx_dx12.cpp b/engine/gfx/dx12/src/gfx_dx12.cpp
index 5b57a8f..5b54f8e 100755
--- a/engine/gfx/dx12/src/gfx_dx12.cpp
+++ b/engine/gfx/dx12/src/gfx_dx12.cpp
@@ -6,14 +6,35 @@
 
 #include <wrl.h>
 
-using namespace Microsoft::WRL;
+// from https://stackoverflow.com/a/18374698
+std::string ws2s(const std::wstring& wstr) {
+    using convert_typeX = std::codecvt_utf8<wchar_t>;
+    std::wstring_convert<convert_typeX, wchar_t> converterX;
 
-ComPtr<ID3D12Device> g_Device;
+    return converterX.to_bytes(wstr);
+}
 
 bool gfx_dx12::initialize(const GFXCreateInfo& info) {
+    get_device();
+
 	return true;
 }
 
+void gfx_dx12::get_device() {
+    ComPtr<IDXGIFactory4> dxgiFactory;
+    UINT createFactoryFlags = DXGI_CREATE_FACTORY_DEBUG;
+
+    CreateDXGIFactory2(createFactoryFlags, IID_PPV_ARGS(&dxgiFactory));
+
+    ComPtr<IDXGIAdapter1> adapter;
+    for (UINT i = 0; dxgiFactory->EnumAdapters1(i, &adapter) != DXGI_ERROR_NOT_FOUND; i++) {
+        DXGI_ADAPTER_DESC1 dxgiAdapterDesc1;
+        adapter->GetDesc1(&dxgiAdapterDesc1);
+
+        prism::log("GPU: {}", ws2s(dxgiAdapterDesc1.Description));
+    }
+}
+
 const char* gfx_dx12::get_name() {
     return "DX12";
 }