From 1ecccf3c9929aa4c64b0054a5ba0798ba5e0e48f Mon Sep 17 00:00:00 2001
From: Nigel Barink <nigelbarink@hotmail.com>
Date: Wed, 10 May 2023 17:28:36 +0200
Subject: [PATCH] First steps

Rendering a blue background using DirectX9
---
 premake5.lua |  2 +-
 src/main.cpp | 58 ++++++++++++++++++++++++++++++++++++++++++++++++----
 2 files changed, 55 insertions(+), 5 deletions(-)

diff --git a/premake5.lua b/premake5.lua
index cab7973..ecc92a8 100644
--- a/premake5.lua
+++ b/premake5.lua
@@ -7,7 +7,7 @@ project "LearnDirectX"
     targetdir "bin/%{cfg.buildcfg}"
     architecture "x64"
 
-    links {"glfw3"}
+    links {"glfw3", "d3d9"}
 
     libdirs{ "vendor/GLFW/lib"}
     includedirs {"vendor/GLFW/include"}
diff --git a/src/main.cpp b/src/main.cpp
index 0602213..176edab 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -1,5 +1,47 @@
 #include <iostream>
+#include <Windows.h>
+#define GLFW_EXPOSE_NATIVE_WIN32
 #include "GLFW/glfw3.h"
+#include "GLFW/glfw3native.h"
+#include <d3d9.h>
+LPDIRECT3D9 d3d; // pointer to our Direct3D interface 
+LPDIRECT3DDEVICE9 d3ddev; // pointer to the device class
+
+void initD3D(HWND hWnd) {
+    d3d = Direct3DCreate9(D3D_SDK_VERSION); // create the Direct3D interface 
+
+    D3DPRESENT_PARAMETERS d3dpp; // create the strcut to hold device info
+
+    ZeroMemory(&d3dpp, sizeof(d3dpp)); // clear the struct
+    d3dpp.Windowed = TRUE;
+    d3dpp.SwapEffect = D3DSWAPEFFECT_DISCARD;
+    d3dpp.hDeviceWindow = hWnd;
+
+    // create a device class using the information gathered
+    d3d->CreateDevice(D3DADAPTER_DEFAULT,
+        D3DDEVTYPE_HAL,
+        hWnd,
+        D3DCREATE_SOFTWARE_VERTEXPROCESSING,
+        &d3dpp,
+        &d3ddev);
+}
+
+
+void render_frame() {
+    d3ddev->Clear(0, nullptr, D3DCLEAR_TARGET, D3DCOLOR_XRGB(0, 40, 100), 1.0f, 0);
+    d3ddev->BeginScene();
+    // do 3D rendering
+    d3ddev->EndScene();
+
+    d3ddev->Present(NULL, NULL, NULL, NULL);
+}
+
+void cleanD3D() {
+    d3ddev->Release();
+    d3d->Release();
+}
+
+
 
 void error_callback(int code , const char* description) {
     std::cerr << description << std::endl;
@@ -19,20 +61,28 @@ int main ( int argc , char** argv){
     glfwWindowHint(GLFW_CLIENT_API, GLFW_NO_API);
 
     window = glfwCreateWindow(640, 480, "LearnDirectX", nullptr, nullptr);
-
-
-    
     if (!window) {
         std::cout << "Failed to create window!" << std::endl;
         glfwTerminate();
         return -1;
     }
 
+
+    HWND NativeWindowHandle = glfwGetWin32Window(window);
+    
+
+    initD3D(NativeWindowHandle);
+
+
+
+
     while (!glfwWindowShouldClose(window)) {
-        
+        render_frame();
+
         glfwPollEvents();
     }
 
+    cleanD3D();
 
     glfwTerminate();