几乎所有的D3D例子都是用COM和C++写的。C语言可以用D3D吗，StackOverflow上给出了答案：directx-programming-in-c。
1 hr = IDirect3D9_GetDeviceCaps(d3d, D3DADAPTER_DEFAULT, D3DDEVTYPE_HAL, &d3dcaps9); 2 hr = IDirect3D9_GetAdapterDisplayMode(d3d, D3DADAPTER_DEFAULT, &d3ddm); 3 hr = IDirect3D9_CreateDevice(d3d, D3DADAPTER_DEFAULT, D3DDEVTYPE_HAL, game_window, D3DCREATE_HARDWARE_VERTEXPROCESSING | D3DCREATE_MULTITHREADED, &d3dpp, &d3d_dev);
按照这种格式，可以用C语言写出Direct3D的Demo:
1 #include<d3d9.h>
2
3 #pragma comment(lib, "d3d9.lib")
4
5 #define WINDOW_CLASS "UGPDX"
6 #define WINDOW_NAME "Drawing Lines"
7
8 // Function Prototypes...
9 BOOL InitializeD3D(HWND hWnd, BOOL fullscreen);
10 BOOL InitializeObjects();
11 void RenderScene();
12 void Shutdown();
13
14
15 // Direct3D object and device.
16 LPDIRECT3D9 g_D3D = NULL;
17 LPDIRECT3DDEVICE9 g_D3DDevice = NULL;
18
19 // Vertex buffer to hold the geometry.
20 LPDIRECT3DVERTEXBUFFER9 g_VertexBuffer = NULL;
21
22
23 // A structure for our custom vertex type
24 typedef struct
25 {
26 float x, y, z, rhw;
27 unsigned long color;
28 }stD3DVertex;
29
30 // Our custom FVF, which describes our custom vertex structure.
31 #define D3DFVF_VERTEX (D3DFVF_XYZRHW | D3DFVF_DIFFUSE)
32
33
34 LRESULT WINAPI MsgProc(HWND hWnd, UINT msg, WPARAM wp, LPARAM lp)
35 {
36 switch (msg)
37 {
38 case WM_DESTROY:
39 PostQuitMessage(0);
40 return 0;
41 break;
42
43 case WM_KEYUP:
44 if (wp == VK_ESCAPE) PostQuitMessage(0);
45 break;
46 }
47
48 return DefWindowProc(hWnd, msg, wp, lp);
49 }
50
51
52 int WINAPI WinMain(HINSTANCE hInst, HINSTANCE prevhInst,
53 LPSTR cmdLine, int show)
54 {
55 // Register the window class
56 WNDCLASSEX wc = { sizeof(WNDCLASSEX), CS_CLASSDC, MsgProc,
57 0, 0, GetModuleHandle(NULL), NULL, LoadCursor(NULL,IDC_ARROW),
58 NULL, NULL, WINDOW_CLASS, NULL };
59 RegisterClassEx(&wc);
60
61 // Create the application‘s window
62 HWND hWnd = CreateWindow(WINDOW_CLASS, WINDOW_NAME,
63 WS_OVERLAPPEDWINDOW, 100, 100,
64 640, 480, GetDesktopWindow(), NULL,
65 wc.hInstance, NULL);
66
67 // Initialize Direct3D
68 if (InitializeD3D(hWnd, FALSE))
69 {
70 // Show the window
71 ShowWindow(hWnd, SW_SHOWDEFAULT);
72 UpdateWindow(hWnd);
73
74 // Enter the message loop
75 MSG msg;
76 ZeroMemory(&msg, sizeof(msg));
77
78 while (msg.message != WM_QUIT)
79 {
80 if (PeekMessage(&msg, NULL, 0U, 0U, PM_REMOVE))
81 {
82 TranslateMessage(&msg);
83 DispatchMessage(&msg);
84 }
85 else
86 RenderScene();
87 }
88 }
89
90 // Release any and all resources.
91 Shutdown();
92
93 // Unregister our window.
94 UnregisterClass(WINDOW_CLASS, wc.hInstance);
95 return 0;
96 }
97
98
99 BOOL InitializeD3D(HWND hWnd, BOOL fullscreen)
100 {
101 D3DDISPLAYMODE displayMode;
102
103 // Create the D3D object.
104 g_D3D = Direct3DCreate9(D3D_SDK_VERSION);
105 if (g_D3D == NULL) return FALSE;
106
107
108 // Get the desktop display mode.
109 if (FAILED(IDirect3D9_GetAdapterDisplayMode(g_D3D,D3DADAPTER_DEFAULT,
110 &displayMode))) return FALSE;
111
112
113 // Set up the structure used to create the D3DDevice
114 D3DPRESENT_PARAMETERS d3dpp;
115 ZeroMemory(&d3dpp, sizeof(d3dpp));
116
117
118 if (fullscreen)
119 {
120 d3dpp.Windowed = FALSE;
121 d3dpp.BackBufferWidth = 640;
122 d3dpp.BackBufferHeight = 480;
123 }
124 else
125 d3dpp.Windowed = TRUE;
126 d3dpp.SwapEffect = D3DSWAPEFFECT_DISCARD;
127 d3dpp.BackBufferFormat = displayMode.Format;
128
129
130 // Create the D3DDevice
131 if (FAILED(IDirect3D9_CreateDevice(g_D3D,D3DADAPTER_DEFAULT,
132 D3DDEVTYPE_HAL, hWnd, D3DCREATE_HARDWARE_VERTEXPROCESSING,
133 &d3dpp, &g_D3DDevice))) return FALSE;
134
135
136 // Initialize any objects we will be displaying.
137 if (!InitializeObjects()) return FALSE;
138
139 return TRUE;
140 }
141
142
143 BOOL InitializeObjects()
144 {
145 unsigned long col = D3DCOLOR_XRGB(255, 255, 255);
146
147 // Fill in our structure to draw an object.
148 // x, y, z, rhw, color.
149 stD3DVertex objData[] =
150 {
151 { 420.0f, 150.0f, 0.5f, 1.0f, col, },
152 { 420.0f, 350.0f, 0.5f, 1.0f, col, },
153 { 220.0f, 150.0f, 0.5f, 1.0f, col, },
154 { 220.0f, 350.0f, 0.5f, 1.0f, col, },
155 };
156
157 // Create the vertex buffer.
158 if (FAILED(IDirect3DDevice9_CreateVertexBuffer(g_D3DDevice,sizeof(objData), 0,
159 D3DFVF_VERTEX, D3DPOOL_DEFAULT, &g_VertexBuffer,
160 NULL))) return FALSE;
161
162 // Fill the vertex buffer.
163 void *ptr;
164
165 if (FAILED(IDirect3DVertexBuffer9_Lock(g_VertexBuffer,0, sizeof(objData),
166 (void**)&ptr, 0))) return FALSE;
167
168 memcpy(ptr, objData, sizeof(objData));
169
170
171 IDirect3DVertexBuffer9_Unlock(g_VertexBuffer);
172
173 return TRUE;
174 }
175
176
177 void RenderScene()
178 {
179 // Clear the backbuffer.
180 IDirect3DDevice9_Clear(g_D3DDevice,0, NULL, D3DCLEAR_TARGET,
181 D3DCOLOR_XRGB(0, 0, 0), 1.0f, 0);
182
183 // Begin the scene. Start rendering.
184 IDirect3DDevice9_BeginScene(g_D3DDevice);
185
186 // Render object.
187 IDirect3DDevice9_SetStreamSource(g_D3DDevice,0, g_VertexBuffer, 0,
188 sizeof(stD3DVertex));
189 IDirect3DDevice9_SetFVF(g_D3DDevice,D3DFVF_VERTEX);
190 IDirect3DDevice9_DrawPrimitive(g_D3DDevice,D3DPT_LINELIST, 0, 2);
191
192 // End the scene. Stop rendering.
193 IDirect3DDevice9_EndScene(g_D3DDevice);
194
195 // Display the scene.
196 IDirect3DDevice9_Present(g_D3DDevice,NULL, NULL, NULL, NULL);
197 }
198
199 void Shutdown()
200 {
201 if (g_D3DDevice != NULL) IDirect3DDevice9_Release(g_D3DDevice);
202 if (g_D3D != NULL) IDirect3D9_Release(g_D3D);
203 if (g_VertexBuffer != NULL) IDirect3DVertexBuffer9_Release(g_VertexBuffer);
204
205 g_D3DDevice = NULL;
206 g_D3D = NULL;
207 g_VertexBuffer = NULL;
208 }
这里只是画了两条平行的线段，作为一个例子：
时间： 2024-08-17 19:20:42