我打算开发一个应用程序来从文件中获取图像并使用Directx9
显示它。我已经使用了这段代码,但我在SetBackBuffer
方法!!
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();
}
}
实际上我想在d3dimage
项目的WPF
中显示图片。谁能帮我?我找不到关于Directx
和C#!!!
使用Sharpdx
编辑并获得新错误“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);
答案 0 :(得分:1)
您正在将后台缓冲区设置为Bitmap
。你不能做这个。后台缓冲区必须是IDirect3DSurface9
类型。这在SetBackBuffer方法的文档中有说明。
为了使用C#(托管)中的DirectX9
(非托管),您需要使用包装器库。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
呈现的IDirect3DDevice9
,并将该表面附加到WPF控件。然后,您呈现的内容将出现在控件中。
我认为使用DirectX
对您所需要的内容可能过度,但我不确定您项目的整个范围是什么。
我整理了一个使用SharpDX在D3DImage
内显示图像的工作示例。这是非常基本的,并没有包含正确的错误处理。它只是为了让你朝着正确的方向前进。
要创建必要的曲面,您需要一个Direct3D 9 Device
。以下代码将使用SharpDX创建Device
。
//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);
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);
创建充当渲染目标的曲面。这是D3DImage
所需的表面类型。
//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);
可以使用Device.UpdateSurfaces
方法将图像表面复制到渲染目标表面。请注意,在前面的步骤中,两个曲面都使用相同的格式创建(A8R8G8B)。当心这个。这是表面复印所必需的。
//Copy the image surface contents into the target surface.
d3dDevice.UpdateSurface(imageSurface, target);
现在你有一个包含你的图像的表面,可以用于' D3DImage`。确保使用目标曲面,而不是图像源曲面。
this.wpfImageSource.Lock();
this.wpfImageSource.SetBackBuffer(D3DResourceType.IDirect3DSurface9, target.NativePointer);
this.wpfImageSource.AddDirtyRect(new Int32Rect(0, 0, wpfImageSource.PixelWidth, wpfImageSource.PixelHeight));
this.wpfImageSource.Unlock();
图像出现!