// setup shadow map objects
V_RETURN(m_pd3dDevice->CreateTexture(
SHADOW_RESULT_MAP_SIZE_WIDTH,
SHADOW_RESULT_MAP_SIZE_HEIGHT,
1,
D3DUSAGE_RENDERTARGET,//<====render target
SHADOW_MAP_FORMAT,
D3DPOOL_DEFAULT,
&m_pShadowMapTex,
NULL
));
V_RETURN(m_pShadowMapTex->GetSurfaceLevel(0, &m_pShadowMapSurf));
V_RETURN(m_pd3dDevice->CreateDepthStencilSurface(
SHADOW_RESULT_MAP_SIZE_WIDTH,
SHADOW_RESULT_MAP_SIZE_HEIGHT,
D3DFMT_D24S8,
D3DMULTISAMPLE_NONE,
0,
TRUE,
&m_pShadowMapZ,
NULL
));
//lock surface and get color
D3DLOCKED_RECT lrect;
D3DSURFACE_DESC Desc;
m_pShadowMapSurf->GetDesc(&Desc);
hr=m_pShadowMapSurf->LockRect(&lrect,NULL,D3DLOCK_DONOTWAIT|D3DLOCK_READONLY );//<==hr=-2005530516 D3DERR_INVALIDCALL
for (int y=0;y<Desc.Height;y++)
{
for (int x=0;Desc.Width;x++)
{
float dwColor = ((float*)lrect.pBits)[y*(lrect.Pitch/sizeof(float))+x];//Y*Width+X
int r=(int)(dwColor*255.0f);
if (dwColor<0.3f)
{
nPixel++;
}
}
}
m_pShadowMapSurf->UnlockRect();
How to get the pixel color in surface (RenderTarget)
Author
I create a rendertarget texture and draw some object in its surface.
Now I want to get each pixel color in the surface.
But LockRect function always returns -2005530516 (D3DERR_INVALIDCALL).
How do I get the pixel color in surface (rendertarget texture)?
You can't lock textures created in D3DPOOL_DEFAULT, you have to copy the data to a texture in system memory. See the remarks section of the documentation for IDirect3DTexture9::LockRect for more details.
Author
Quote:Original post by MJP
You can't lock textures created in D3DPOOL_DEFAULT, you have to copy the data to a texture in system memory. See the remarks section of the documentation for IDirect3DTexture9::LockRect for more details.
Thank you,MJP. Are you the MJP in XNA Create Club?
int nPixel=0; D3DLOCKED_RECT lrect; D3DSURFACE_DESC Desc; m_pShadowMapSurf->GetDesc(&Desc); LPDIRECT3DSURFACE9 pDestSurface; m_pd3dDevice->CreateOffscreenPlainSurface(Desc.Width,Desc.Height,Desc.Format,D3DPOOL_SYSTEMMEM,&pDestSurface,NULL);//Must be D3DPOOL_SYSTEMMEM for MSDN m_pd3dDevice->GetRenderTargetData(m_pShadowMapSurf,pDestSurface); hr=pDestSurface->LockRect(&lrect,NULL,D3DLOCK_NO_DIRTY_UPDATE|D3DLOCK_READONLY ); for (int y=0;y<Desc.Height;y++) { for (int x=0;x<Desc.Width;x++) { float dwColor = ((float*)lrect.pBits)[y*(lrect.Pitch/sizeof(float))+x];//Y*Width+X int r=(int)(dwColor*255.0f); if (dwColor<0.3f) { nPixel++; } } } pDestSurface->UnlockRect(); SAFE_RELEASE(pDestSurface);[Edited by - akira32 on March 20, 2008 8:29:05 AM]
Quote:Original post by akira32
Thank you,MVP. Are you the MVP in XNA Create Club?
No sir, I am not. I haven't actually done any work with XNA yet (my past few projects have used straight C++ and Direct3D9), but I've been learning C# in preparation for doing my next project in XNA through the Creators Club.
This topic is closed to new replies.
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