From 0b5491e0a2f1a9a4023e2c4eb171287bede41388 Mon Sep 17 00:00:00 2001
From: Marc Sunet <marc.sunet@amd.com>
Date: Fri, 21 Nov 2025 09:41:06 -0800
Subject: Switch to plain C

---
 dxg/CMakeLists.txt         | 23 ++++++++++---------
 dxg/dxcommon.h             | 17 --------------
 dxg/dxcommon.ixx           | 53 --------------------------------------------
 dxg/include/dxg/dxcommon.h | 55 ++++++++++++++++++++++++++++++++++++++++++++++
 dxg/src/dxg.c              |  1 +
 5 files changed, 69 insertions(+), 80 deletions(-)
 delete mode 100644 dxg/dxcommon.h
 delete mode 100644 dxg/dxcommon.ixx
 create mode 100644 dxg/include/dxg/dxcommon.h
 create mode 100644 dxg/src/dxg.c

(limited to 'dxg')

diff --git a/dxg/CMakeLists.txt b/dxg/CMakeLists.txt
index 6fa5401..b7607c0 100644
--- a/dxg/CMakeLists.txt
+++ b/dxg/CMakeLists.txt
@@ -1,20 +1,23 @@
-cmake_minimum_required(VERSION 3.25)
+cmake_minimum_required(VERSION 3.20)
 
 project(dxg)
 
-add_library(dxg)
+add_library(dxg
+    include/dxg/dxcommon.h
+    src/dxg.c)
 
-target_sources(dxg PUBLIC
-    dxcommon.h)
-
-target_sources(dxg PUBLIC
-    FILE_SET cxx_modules TYPE CXX_MODULES FILES
-    dxcommon.ixx)
+# target_sources(dxg PUBLIC
+#     FILE_SET cxx_modules TYPE CXX_MODULES FILES
+#     asset.ixx
+#     dxcommon.ixx
+#     dxg.ixx
+#     imm.ixx)
 
 target_include_directories(dxg PUBLIC
-    .)
+    include)
 
 target_link_libraries(dxg PUBLIC
     DirectX-Headers
     D3D12.lib
-    DXGI.lib)
+    DXGI.lib
+    DXGUID.lib) # For IID_Xyz symbols
diff --git a/dxg/dxcommon.h b/dxg/dxcommon.h
deleted file mode 100644
index addb8c3..0000000
--- a/dxg/dxcommon.h
+++ /dev/null
@@ -1,17 +0,0 @@
-#pragma once
-
-#include <d3d12.h>
-#include <dxgi1_4.h>
-#include <directx/d3dx12.h>
-
-#define THROW(error) throw exception(error, __FILE__, __LINE__)
-
-#define ThrowIfFailed(result) \
-{\
-    if (result != S_OK) \
-    {\
-        THROW(result);\
-    }\
-}
-
-//#define IID_PPV_ARGS(ppType) __uuidof(**(ppType)), static_cast<void**>(ppType)
diff --git a/dxg/dxcommon.ixx b/dxg/dxcommon.ixx
deleted file mode 100644
index b06ae95..0000000
--- a/dxg/dxcommon.ixx
+++ /dev/null
@@ -1,53 +0,0 @@
-module;
-
-#include <wrl.h>
-#include <stdexcept>
-
-export module dxcommon;
-
-using Microsoft::WRL::ComPtr;
-
-namespace dx {
-
-export {
-
-class exception : public std::exception
-{
-public:
-    exception() noexcept = default;
-
-    exception(HRESULT result, const char* file, int line) noexcept
-    {
-        sprintf_s(m_error, sizeof(m_error), "%s:%d Failed with HRESULT = %08X",
-            file, line, static_cast<unsigned int>(result));
-    }
-
-    exception(const char* error, const char* file, int line) noexcept
-    {
-        sprintf_s(m_error, sizeof(m_error), "%s:%d %s", file, line, error);
-    }
-
-    [[nodiscard]] const char* what() const noexcept final
-    {
-        return m_error;
-    }
-
-private:
-    static thread_local char m_error[1024];
-};
-
-template <typename T>
-void SafeRelease(ComPtr<T>& ptr)
-{
-    if (ptr)
-    {
-        ptr->Release();
-        ptr = nullptr;
-    }
-}
-
-} // export
-
-thread_local char exception::m_error[1024];
-
-} // dx
diff --git a/dxg/include/dxg/dxcommon.h b/dxg/include/dxg/dxcommon.h
new file mode 100644
index 0000000..bfcdbe8
--- /dev/null
+++ b/dxg/include/dxg/dxcommon.h
@@ -0,0 +1,55 @@
+#pragma once
+
+#include <d3d12.h>
+#include <dxgi1_4.h>
+#include <directx/d3dx12.h>
+
+#include <assert.h>
+#include <stdio.h>
+
+#define TRAP(ERROR) { \
+    fprintf(stderr, "Error in file:[%s] line:%d: %s", __FILE__, __LINE__, ERROR);\
+    assert(false);\
+    __debugbreak();\
+}
+
+#define TRAP_HRESULT(RESULT) { \
+    fprintf(stderr, "HRESULT: %u", RESULT);\
+    TRAP("API call failed")\
+}
+
+#define TrapIfFailed(RESULT) {\
+    if (RESULT != S_OK) {\
+        TRAP_HRESULT(RESULT);\
+    }\
+}
+
+#define SafeRelease(PTR) {\
+    if (PTR) {\
+        PTR->lpVtbl->Release(PTR);\
+        PTR = 0;\
+    }\
+}
+
+#define CD3DX12_CPU_DESCRIPTOR_HANDLE(HANDLE, INDEX, SIZE) \
+    (D3D12_CPU_DESCRIPTOR_HANDLE){HANDLE.ptr + (INDEX * SIZE)}
+
+#define OFFSET_HANDLE(HANDLE, OFFSET, SIZE) \
+    (D3D12_CPU_DESCRIPTOR_HANDLE){HANDLE.ptr + (OFFSET * SIZE)}
+
+static inline D3D12_RESOURCE_BARRIER CD3DX12_RESOURCE_BARRIER_Transition(
+    _In_ ID3D12Resource*  pResource,
+    D3D12_RESOURCE_STATES stateBefore,
+    D3D12_RESOURCE_STATES stateAfter) {
+    return (D3D12_RESOURCE_BARRIER){
+        .Type                   = D3D12_RESOURCE_BARRIER_TYPE_TRANSITION,
+        .Flags                  = D3D12_RESOURCE_BARRIER_FLAG_NONE,
+        .Transition.pResource   = pResource,
+        .Transition.StateBefore = stateBefore,
+        .Transition.StateAfter  = stateAfter,
+        .Transition.Subresource = D3D12_RESOURCE_BARRIER_ALL_SUBRESOURCES};
+}
+
+typedef enum SampleMask {
+    PointSampling = 0xffffffff
+} SampleMask;
diff --git a/dxg/src/dxg.c b/dxg/src/dxg.c
new file mode 100644
index 0000000..e985d3d
--- /dev/null
+++ b/dxg/src/dxg.c
@@ -0,0 +1 @@
+int x = 2;
-- 
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