Directx9 surface to texture

Question

I want to capture my Backbuffer into my LPDIRECT3DSURFACE9 and then copy the surface into my IDirect3DTexture9 finally use that texture as my object skin. I wrote the codes but just received black pixels.

IDirect3DTexture9* texture;
LPDIRECT3DSURFACE9 pd3dsBack = NULL;

void init()//init point
{

    D3DXCreateTexture(g_pd3dDevice, 640, 480, D3DUSAGE_DYNAMIC,
        0, D3DFMT_X8R8G8B8, D3DPOOL_DEFAULT, &texture);

}

void render()//render point
{

    g_pd3dDevice->BeginScene();

    g_pd3dDevice->Clear(0, NULL, D3DCLEAR_TARGET | D3DCLEAR_ZBUFFER,
        D3DCOLOR_COLORVALUE(0.0f, 1.0f, 0.0f, 1.0f), 1.0f, 0);

    //my scene (1) 3d objects codes for draw.

    g_pd3dDevice->EndScene();

    //now try to get back-buffer into surface

    g_pd3dDevice->GetBackBuffer(0, 0, D3DBACKBUFFER_TYPE_MONO, &pd3dsBack);


    //i add this Save section to ensure the backbuffer data received complete and work.(it was ok and save complete true picture of Scene(1) ).

    D3DXSaveSurfaceToFileA("BackbufferImage.BMP", D3DXIFF_BMP, pd3dsBack, NULL, NULL);


    //this line put surface into my texture ; if u think this way is false please give me a simple code to fill texture by surface.

    texture->GetSurfaceLevel(0, &pd3dsBack);

    pd3dsBack->Release();//release my surface


                         //scene(2)
    g_pd3dDevice->BeginScene();

    g_pd3dDevice->Clear(0, NULL, D3DCLEAR_TARGET | D3DCLEAR_ZBUFFER,
        D3DCOLOR_COLORVALUE(1.0f, 0.0f, 0.0f, 1.0f), 1.0f, 0);

    //now render my scene(2) and useing the texture object for draw it as skin of my 3d     object
    g_pd3dDevice->SetTexture(0, texture);

    g_pd3dDevice->EndScene();


    g_pd3dDevice->Present(NULL, NULL, NULL, NULL);

}

Answer 1

You can try something like this

LPDIRECT3DDEVICE9 l_Device= RenderManager()->GetDirectXDevice();
LPDIRECT3DSURFACE9 l_RenderTarget, l_Surface;

m_Texture->GetSurfaceLevel(0,&l_Surface);
l_Device->GetRenderTarget(IdStage,&l_RenderTarget);
l_Device->StretchRect(l_RenderTarget,NULL, l_Surface,NULL,D3DTEXF_NONE);
l_RenderTarget->Release();

Where IdStage is current render target you want to copy, in your case it will be 0

m_Texture is a DirectX Texture that you want to receive the copy from the backbuffer