我打算开发一个应用程序来从文件中获取图像并用Directx9
. 我已经使用了这段代码,但我在SetBackBuffer
方法上遇到了错误!!
System.AccessViolationException: 'Attempted to read or write protected memory. This is often an indication that other memory is corrupt.
private void d3dImage_IsFrontBufferAvailableChanged(object sender, DependencyPropertyChangedEventArgs e)
{
if (d3dImage.IsFrontBufferAvailable)
{
// (Re)initialization:
Bitmap b = new Bitmap(@"C:\Users\newuser\Desktop\3.jpg");
IntPtr Mysurface = b.GetHbitmap();
if (Mysurface != IntPtr.Zero)
{
d3dImage.Lock();
//Error occurred this line
d3dImage.SetBackBuffer(D3DResourceType.IDirect3DSurface9, Mysurface);
d3dImage.Unlock();
CompositionTarget.Rendering += CompositionTarget_Rendering;
}
}
else
{
// Cleanup:
CompositionTarget.Rendering -= CompositionTarget_Rendering;
//Sample.Cleanup();
}
}
protected override void OnSourceInitialized(EventArgs e)
{
base.OnSourceInitialized(e);
// Now that we can get an HWND for the Window, force the initialization
// that is otherwise done when the front buffer becomes available:
d3dImage_IsFrontBufferAvailableChanged(this,
new DependencyPropertyChangedEventArgs());
}
private void CompositionTarget_Rendering(object sender, EventArgs e)
{
if (d3dImage.IsFrontBufferAvailable)
{
d3dImage.Lock();
//Sample.Render();
// Invalidate the whole area:
d3dImage.AddDirtyRect(new Int32Rect(0, 0,
d3dImage.PixelWidth, d3dImage.PixelHeight));
d3dImage.Unlock();
}
}
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实际上我想d3dimage
在WPF
项目中显示图像。谁能帮我?我找不到关于Directx
和 C# 的好资源!!!
使用编辑Sharpdx
并出现新错误 "' HRESULT: [0x8876086C], Module: [SharpDX.Direct3D9], ApiCode: [D3DERR_INVALIDCALL/InvalidCall]
, "
s = new SharpDX.Direct3D9.Surface(IntPtr.Zero);
SharpDX.Direct3D9.Surface.FromFile(s, @"C:\Users\newuser\Desktop\3.jpg", SharpDX.Direct3D9.Filter.None, 1);
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您将后台缓冲区设置为Bitmap
. 你不可以做这个。后台缓冲区必须是 类型IDirect3DSurface9
。SetBackBuffer方法的文档中对此进行了说明。
为了DirectX9
从 C#(托管)使用(非托管),您需要使用包装库。你在用一个吗?如果没有,有几个可用。SlimDX和SharpDX似乎是最受欢迎的。使用任何包装器库,您可以创建使用IDirect3DSurface9
渲染的IDirect3DDevice9
,并将该表面附加到您的 WPF 控件。然后您呈现的内容将出现在控件中。
我认为使用DirectX
对于您需要的东西可能有点过分,但我不确定您的项目的整个范围是什么。
我整理了一个工作示例,该示例使用 SharpDX 在D3DImage
. 这是非常基本的,不包括正确的错误处理。它只是为了让你朝着正确的方向前进。
要创建必要的表面,您将需要一个 Direct3D 9 Device
。以下代码将Device
使用 SharpDX创建一个。
//Create the d3d interface.
Direct3D d3d = new Direct3D();
//Get a handle to the WPF window. This is required to create a device.
IntPtr windowHandle = new WindowInteropHelper(this).Handle;
//Create a device. Using standard creation param.
//Width and height have been set to 1 because we wont be using the backbuffer.
//Adapter 0 = default adapter.
PresentParameters presentationParams = new PresentParameters(1,1);
Device d3dDevice = new Device(d3d, 0, DeviceType.Hardware, windowHandle, CreateFlags.HardwareVertexProcessing, presentationParams);
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创建一个表面来保存图像数据。
//Create an empty offscreen surface. Use SystemMemory to allow for surface copying.
Surface imageSurface = Surface.CreateOffscreenPlain(d3dDevice, ImageWidthPixels, ImageHeightPixels, Format.A8R8G8B8, Pool.SystemMemory);
//Fill the surface with the image data.
Surface.FromFile(imageSurface, "dx.jpg", Filter.None, 0);
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创建充当渲染目标的表面。这是 所需的表面类型D3DImage
。
//Create the surface that will act as the render target.
//Set as lockable (required for D3DImage)
Surface target = Surface.CreateRenderTarget(d3dDevice, ImageWidthPixels, ImageHeightPixels, Format.A8R8G8B8, MultisampleType.None, 0, true);
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可以使用该Device.UpdateSurfaces
方法将图像表面复制到渲染目标表面中。请注意,在前面的步骤中,两个曲面都是使用相同的格式 (A8R8G8B) 创建的。当心这个。这对于表面副本是必要的。
//Copy the image surface contents into the target surface.
d3dDevice.UpdateSurface(imageSurface, target);
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您现在有一个包含图像的表面,可以与“D3DImage”一起使用。确保使用目标表面,而不是图像源表面。
this.wpfImageSource.Lock();
this.wpfImageSource.SetBackBuffer(D3DResourceType.IDirect3DSurface9, target.NativePointer);
this.wpfImageSource.AddDirtyRect(new Int32Rect(0, 0, wpfImageSource.PixelWidth, wpfImageSource.PixelHeight));
this.wpfImageSource.Unlock();
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图像出现!
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