I尝试使用CUDA计算和Direct3D 9图形实现WPF应用程序。因此,我采用以下方法:
- 我使用MSDN“漫游指南:在WPF中托管Direct3D9内容”创建WPF应用程序。
- 然后,我使用MSDN“漫游指南:为WPF创建Direct3D9内容”创建DLL。
- 它有效,我可以看到一个旋转的三角形。
- 然后我按照“NVIDIA CUDA C编程指南”第3.2.11.2部分的说明实现了Direct3D 9交互操作。但是cudaGraphicsD3D9RegisterResource函数返回错误。
我在类中声明了CUDA图形资源变量:
#pragma once
class CTriangleRenderer : public CRenderer
{
public:
static HRESULT Create(IDirect3D9 *pD3D, IDirect3D9Ex *pD3DEx, HWND hwnd, UINT uAdapter, CRenderer **ppRenderer);
~CTriangleRenderer();
HRESULT Render();
protected:
HRESULT Init(IDirect3D9 *pD3D, IDirect3D9Ex *pD3DEx, HWND hwnd, UINT uAdapter);
private:
CTriangleRenderer();
IDirect3DVertexBuffer9 *m_pd3dVB;
struct cudaGraphicsResource* positionsVB_CUDA;
};
cudaGraphicsD3D9RegisterResource函数调用是这个类成员:
HRESULT
CTriangleRenderer::Init(IDirect3D9 *pD3D, IDirect3D9Ex *pD3DEx, HWND hwnd, UINT uAdapter)
{
HRESULT hr = S_OK;
D3DXMATRIXA16 matView, matProj;
D3DXVECTOR3 vEyePt(0.0f, 0.0f,-5.0f);
D3DXVECTOR3 vLookatPt(0.0f, 0.0f, 0.0f);
D3DXVECTOR3 vUpVec(0.0f, 1.0f, 0.0f);
// Call base to create the device and render target
IFC(CRenderer::Init(pD3D, pD3DEx, hwnd, uAdapter));
// Set up the VB
CUSTOMVERTEX vertices[] =
{
{ -1.0f, -1.0f, 0.0f, 0xffff0000, }, // x, y, z, color
{ 1.0f, -1.0f, 0.0f, 0xff00ff00, },
{ 0.0f, 1.0f, 0.0f, 0xff00ffff, },
};
IFC(m_pd3dDevice->CreateVertexBuffer(sizeof(vertices), 0, D3DFVF_CUSTOMVERTEX, D3DPOOL_DEFAULT, &m_pd3dVB, NULL));
cudaGraphicsD3D9RegisterResource(&positionsVB_CUDA, m_pd3dVB, cudaGraphicsRegisterFlagsNone);
cutilCheckMsg("cudaGraphicsD3D9RegisterResource failed");
cudaGraphicsResourceSetMapFlags(positionsVB_CUDA, cudaGraphicsMapFlagsWriteDiscard);
void *pVertices;
IFC(m_pd3dVB->Lock(0, sizeof(vertices), &pVertices, 0));
memcpy(pVertices, vertices, sizeof(vertices));
m_pd3dVB->Unlock();
// Set up the camera
D3DXMatrixLookAtLH(&matView, &vEyePt, &vLookatPt, &vUpVec);
IFC(m_pd3dDevice->SetTransform(D3DTS_VIEW, &matView));
D3DXMatrixPerspectiveFovLH(&matProj, D3DX_PI / 4, 1.0f, 1.0f, 100.0f);
IFC(m_pd3dDevice->SetTransform(D3DTS_PROJECTION, &matProj));
// Set up the global state
IFC(m_pd3dDevice->SetRenderState(D3DRS_CULLMODE, D3DCULL_NONE));
IFC(m_pd3dDevice->SetRenderState(D3DRS_LIGHTING, FALSE));
IFC(m_pd3dDevice->SetStreamSource(0, m_pd3dVB, 0, sizeof(CUSTOMVERTEX)));
IFC(m_pd3dDevice->SetFVF(D3DFVF_CUSTOMVERTEX));
Cleanup:
return hr;
}
调用 cudaGraphicsD3D9RegisterResource 前, positionsVB_CUDA 变量的值为 0xcdcdcdcd,在调用后仍然相同。
我的问题出在哪里?CUDA SDK 中的 Direct3D 9 互操作示例可以正常工作。我的配置:
- NVIDIA GTX 260 800 MB
- NVIDIA GTX 460 2 GB
- CUDA 4.0
- Windows 7 64-bit
- 8GB RAM
- Visual Studio 2010