SlimDX和WPF的合作应用
2024-04-21 01:44:25
1.首先定义一个DX操作类
1 using System;
2 using SlimDX;
3 using SlimDX.Direct3D9;
4 using System.Windows.Interop;
5 using System.Windows.Media;
6
7 public class DX
8 {
9 private enum DirectXStatus
10 {
11 Available,
12 Unavailable_RemoteSession,
13 Unavailable_LowTier,
14 Unavailable_MissingDirectX,
15 Unavailable_Unknown
16 };
17
18 public static Device Device { get; private set; }
19 public static bool Available { get { return DX.Device != null; } }// = false;
20
21 private static DX _dx;
22 private static DirectXStatus _status = DirectXStatus.Unavailable_Unknown;
23 private static string _statusMessage = "";
24
25 [System.Runtime.InteropServices.DllImport("user32")]
26 private static extern int GetSystemMetrics(int smIndex);
27 private const int SM_REMOTESESSION = 0x1000;
28
29 // device settings
30 private const Format _adapterFormat = Format.X8R8G8B8;
31 private const Format _backbufferFormat = Format.A8R8G8B8;
32 private const Format _depthStencilFormat = Format.D16;
33 private static CreateFlags _createFlags = CreateFlags.Multithreaded | CreateFlags.FpuPreserve;
34
35 private Direct3D _d3d;
36
37
38 private DX()
39 {
40 initD3D();
41 if (_d3d != null)
42 initDevice();
43 //if (!DX.Available)
44 // MessageBox.Show("DirectX硬件加速不可用！\n\n" + _statusMessage, "", MessageBoxButton.OK, MessageBoxImage.Warning);
45 }
46
47 ~DX()
48 {
49 if (DX.Device != null)
50 if (!DX.Device.Disposed)
51 DX.Device.Dispose();
52 if (_d3d != null)
53 if (!_d3d.Disposed)
54 _d3d.Dispose();
55 }
56
57 public static void Init()
58 {
59 if (_dx == null)
60 _dx = new DX();
61 }
62
63 private void initD3D()
64 {
65 if (_d3d != null)
66 return;
67
68 _status = DirectXStatus.Unavailable_Unknown;
69
70 //// assume that we can't run at all under terminal services
71 if (GetSystemMetrics(SM_REMOTESESSION) != 0)
72 {
73 _status = DirectXStatus.Unavailable_RemoteSession;
74 return;
75 }
76
77 int renderingTier = (RenderCapability.Tier >> 16);
78 if (renderingTier < 2)
79 {
80 _status = DirectXStatus.Unavailable_LowTier;
81 _statusMessage = "low tier";
82 return;//注意：发现某些集成显卡，在这里出去！！
83 }
84
85 try
86 {
87 _d3d = new Direct3DEx();
88 }
89 catch
90 {
91 try
92 {
93 _d3d = new Direct3D();
94 }
95 catch (Direct3DX9NotFoundException dfe)
96 {
97 _status = DirectXStatus.Unavailable_MissingDirectX;
98 _statusMessage = "Direct3DX9 Not Found\n" + dfe.Message;
99 return;
100 }
101 catch (Exception e)
102 {
103 _status = DirectXStatus.Unavailable_Unknown;
104 _statusMessage = e.Message;
105 return;
106 }
107 }
108
109 bool ok;
110 Result result;
111
112 ok = _d3d.CheckDeviceType(0, DeviceType.Hardware, _adapterFormat, _backbufferFormat, true, out result);
113 if (!ok)
114 {
115 //Debug.WriteLine("*** failed to CheckDeviceType");
116 //MessageBox.Show("Failed to CheckDeviceType");
117 return;
118 }
119
120 ok = _d3d.CheckDepthStencilMatch(0, DeviceType.Hardware, _adapterFormat, _backbufferFormat, _depthStencilFormat, out result);
121 if (!ok)
122 {
123 //Debug.WriteLine("*** failed to CheckDepthStencilMatch");
124 _statusMessage = "Failed to CheckDepthStencilMatch";
125 return;
126 }
127
128 Capabilities deviceCaps = _d3d.GetDeviceCaps(0, DeviceType.Hardware);
129 if ((deviceCaps.DeviceCaps & DeviceCaps.HWTransformAndLight) != 0)
130 _createFlags |= CreateFlags.HardwareVertexProcessing;
131 else
132 _createFlags |= CreateFlags.SoftwareVertexProcessing;
133
134 _status = DirectXStatus.Available;
135 }
136
137 private void initDevice()
138 {
139 if (_status != DirectXStatus.Available)
140 return;
141
142 HwndSource hwnd = new HwndSource(0, 0, 0, 0, 0, 0, 0, "SlimDX_Wnd", IntPtr.Zero);
143 PresentParameters pp = new PresentParameters();
144 //pp.SwapEffect = SwapEffect.Copy;
145 //pp.DeviceWindowHandle = hwnd.Handle;
146 pp.Windowed = true;
147 pp.PresentFlags = PresentFlags.Video;
148 pp.SwapEffect = SwapEffect.Discard;
149 //pp.BackBufferCount = 1;
150 //pp.BackBufferWidth = 320;
151 //pp.BackBufferHeight = 240;
152 //pp.BackBufferFormat = _backbufferFormat;
153 //pp.AutoDepthStencilFormat = _depthStencilFormat;
154 try
155 {
156 DeviceType deviceType = DeviceType.Hardware;
157 if (_d3d is Direct3DEx)
158 DX.Device = new DeviceEx((Direct3DEx)_d3d, 0, deviceType, hwnd.Handle, _createFlags, pp);
159 else
160 DX.Device = new Device(_d3d, 0, deviceType, hwnd.Handle, _createFlags, pp);
161 }
162 catch (Exception ex)
163 {
164 //Debug.WriteLine("Exception in Direct3DReset " + ex.StackTrace);
165 //Debug.WriteLine("Exception in Direct3DReset " + ex.Message);
166 }
167 }
168 }2.定义准备显卡硬件，和释放显卡硬件方法
定义一些变量
/// <summary>/// 离屏表面/// </summary>private Surface _offscrn;/// <summary>/// 交换链/// </summary>private SwapChain _swapChain;private D3DImage _d3dImage = null;
1 /// <summary>
2 /// 准备DirectX显卡硬件
3 /// </summary>
4 private bool prepareHardware(VideoFormat videoFormat, int videoWidth, int videoHeight)//, VideoFormat videoFormat)
5 {
6 if (!DX.Available)
7 return true;
8
9 try
10 {
11 SlimDX.Direct3D9.Format format = SlimDX.Direct3D9.Format.A8R8G8B8;
12 if (videoFormat == VideoFormat.Yuv420)
13 format = (SlimDX.Direct3D9.Format)0x32315659;
14 if (_offscrn != null)
15 if (videoWidth == _offscrn.Description.Width && videoHeight == _offscrn.Description.Height && _offscrn.Description.Format == format)
16 return true;
17
18 releaseHardware();
19 _offscrn = Surface.CreateOffscreenPlain(DX.Device, videoWidth, videoHeight, format, Pool.Default);
20 PresentParameters pp = new PresentParameters();
21 pp.Windowed = true;
22 pp.PresentFlags = PresentFlags.Video;
23 pp.SwapEffect = SwapEffect.Discard;
24 pp.BackBufferCount = 1;
25 pp.BackBufferWidth = videoWidth;
26 pp.BackBufferHeight = videoHeight;
27 _swapChain = new SwapChain(DX.Device, pp);
28 return true;
29 }
30 catch
31 {
32 return false;
33 }
34 }
35 /// <summary>
36 /// 释放DirectX显卡硬件
37 /// </summary>
38 private void releaseHardware()
39 {
40 if (!DX.Available)
41 return;
42 if (_offscrn != null)
43 if (!_offscrn.Disposed)
44 _offscrn.Dispose();
45 _offscrn = null;
46 if (_swapChain != null)
47 if (!_swapChain.Disposed)
48 _swapChain.Dispose();
49 _swapChain = null;
50 }3.
private void drawFrame(VideoFormat videoFormat, int width, int height, IntPtr Y, IntPtr U, IntPtr V){if (!prepareHardware(videoFormat, width, height))return;if (_swapChain == null)return;DataRectangle dr = _offscrn.LockRectangle(LockFlags.None);//在离屏表面上锁定一个矩形drawYuv420(width, height, Y, U, V, dr.Data.DataPointer, dr.Pitch);//DataPointer 内部指针指向当前流的存储备份; Pitch 两个连续的行之间的数据的字节数_offscrn.UnlockRectangle();//解锁矩形using (Surface bb = _swapChain.GetBackBuffer(0))//从交换链中检索一个后台缓冲区
{System.Drawing.Rectangle rect = new System.Drawing.Rectangle(0, 0, bb.Description.Width, bb.Description.Height);_swapChain.Device.StretchRectangle(_offscrn, rect, bb, rect, TextureFilter.None);//将后台缓冲区的内容交换到前台缓冲区_swapChain.Device.Present();//呈现后台缓冲区序列中下一个后台缓冲区的内容
_d3dImage.Lock();_d3dImage.SetBackBuffer(D3DResourceType.IDirect3DSurface9, bb.ComPointer);_d3dImage.AddDirtyRect(new Int32Rect(0, 0, _d3dImage.PixelWidth, _d3dImage.PixelHeight));_d3dImage.Unlock();}}private void drawYuv420(int width, int height, IntPtr Y, IntPtr U, IntPtr V, IntPtr dest, int pitch){IntPtr py = dest;IntPtr pv = py + (pitch * height);IntPtr pu = pv + ((pitch * height) / 4);int w2 = width / 2, pitch2 = pitch / 2;for (int y = 0; y < height; y++){CopyMemory(py, Y + y * width, (uint)width);py += pitch;if ((y & 1) != 0)continue;int offset = y / 2 * w2;CopyMemory(pu, U + offset, (uint)w2);CopyMemory(pv, V + offset, (uint)w2);pu += pitch2;pv += pitch2;}}
[DllImport("kernel32.dll", EntryPoint = "RtlMoveMemory")]private static extern void CopyMemory(IntPtr Destination, IntPtr Source, uint Length);转载于:https://www.cnblogs.com/smartsensor/p/4815381.html
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