Creating a fetchable texture from our zbuffer snapshot

Author: Redotix

src/Layers/xrRender/HW.h

@@ -64,6 +64,9 @@ class CHW
 	ID3D11RenderTargetView*	pBaseRT;	//	combine with DX9 pBaseRT via typedef
 	ID3D11DepthStencilView*	pBaseZB;
 
+	D3D_TEXTURE2D_DESC*		pBaseZBTexDesc;
+	D3D_DEPTH_STENCIL_VIEW_DESC* pBaseZBDesc;
+
 	CHWCaps					Caps;
 
 	D3D_DRIVER_TYPE		m_DriverType;	//	DevT equivalent

src/Layers/xrRender/r__dsgraph_render.cpp

@@ -531,6 +531,21 @@ void R_dsgraph_structure::r_dsgraph_render_hud(bool NoPS)
 	Device.mFullTransform.mul(Device.mProject, Device.mView);
 	RCache.set_xform_project(Device.mProject);
 
+	ID3D11Texture2D* pRt_tempzbTexture = nullptr;
+	HW.pDevice->CreateTexture2D(HW.pBaseZBTexDesc, nullptr, &pRt_tempzbTexture);
+	RImplementation.Target->rt_tempzb->pSurface = pRt_tempzbTexture;
+
+	ID3D11Resource* pResource = nullptr;
+	ID3D11Texture2D* pTexture2D = nullptr;
+
+	HW.pBaseZB->GetResource(&pResource);
+
+	pResource->QueryInterface(__uuidof(ID3D11Texture2D), (void**)&pTexture2D);
+
+	HW.pContext->CopyResource(pTexture2D, RImplementation.Target->rt_tempzb->pTexture->surface_get());
+
+	pResource->Release();
+
 	// Rendering
 	rmNear();
 	if (!NoPS)

src/Layers/xrRenderDX10/dx10HW.cpp

@@ -451,6 +451,9 @@ void CHW::DestroyDevice()
 
 	_SHOW_REF("refCount:pBaseRT", pBaseRT);
 	_RELEASE(pBaseRT);
+
+	pBaseTEXZB->Release();
+
 	//#ifdef DEBUG
 	//	_SHOW_REF				("refCount:dwDebugSB",dwDebugSB);
 	//	_RELEASE				(dwDebugSB);
@@ -516,6 +519,8 @@ void CHW::Reset(HWND hwnd)
 	_RELEASE(pBaseZB);
 	_RELEASE(pBaseRT);
 
+	pBaseTEXZB->Release();
+
 	CHK_DX(m_pSwapChain->ResizeBuffers(
 		cd.BufferCount,
 		desc.Width,
@@ -1029,31 +1034,31 @@ void CHW::UpdateViews()
 	pBuffer->Release();
 	R_CHK(R);
 
-	//	Create Depth/stencil buffer
-	//	HACK: DX10: hard depth buffer format
-	//R_CHK	(pDevice->GetDepthStencilSurface	(&pBaseZB));
-	ID3DTexture2D* pDepthStencil = NULL;
-	D3D_TEXTURE2D_DESC descDepth;
-	descDepth.Width = sd.BufferDesc.Width;
-	descDepth.Height = sd.BufferDesc.Height;
-	descDepth.MipLevels = 1;
-	descDepth.ArraySize = 1;
-	descDepth.Format = DXGI_FORMAT_D24_UNORM_S8_UINT;
-	descDepth.SampleDesc.Count = 1;
-	descDepth.SampleDesc.Quality = 0;
-	descDepth.Usage = D3D_USAGE_DEFAULT;
-	descDepth.BindFlags = D3D_BIND_DEPTH_STENCIL;
-	descDepth.CPUAccessFlags = 0;
-	descDepth.MiscFlags = 0;
-	R = pDevice->CreateTexture2D(&descDepth, // Texture desc
-	                             NULL, // Initial data
-	                             &pDepthStencil); // [out] Texture
-	R_CHK(R);
-
-	//	Create Depth/stencil view
-	R = pDevice->CreateDepthStencilView(pDepthStencil, NULL, &pBaseZB);
-	R_CHK(R);
+	//Create texture resource
+	ID3D11Texture2D* pBaseTEXZB;
+	D3D_TEXTURE2D_DESC texDesc;
+	texDesc.Width = sd.BufferDesc.Width;
+	texDesc.Height = sd.BufferDesc.Height;
+	texDesc.MipLevels = 1;
+	texDesc.ArraySize = 1;
+	texDesc.Format = DXGI_FORMAT_R24G8_TYPELESS;
+	texDesc.SampleDesc.Count = 1;
+	texDesc.SampleDesc.Quality = 0;
+	texDesc.Usage = D3D_USAGE_DEFAULT;
+	texDesc.BindFlags = D3D_BIND_DEPTH_STENCIL | D3D_BIND_SHADER_RESOURCE | D3D_BIND_RENDER_TARGET;
+	texDesc.CPUAccessFlags = 0;
+	texDesc.MiscFlags = 0;
+
+	//Create DSV
+	D3D_DEPTH_STENCIL_VIEW_DESC dsvDesc;
+#if defined(USE_DX11) //dirty hack so it doesnt crash DX10
+	dsvDesc.Flags = 0;
+#endif
+	dsvDesc.Format = DXGI_FORMAT_D24_UNORM_S8_UINT;
+	dsvDesc.ViewDimension = D3D_DSV_DIMENSION_TEXTURE2D;
+	dsvDesc.Texture2D.MipSlice = 0;
 
-	pDepthStencil->Release();
+	R_CHK(pDevice->CreateTexture2D(&texDesc, NULL, &pBaseTEXZB));
+    R_CHK(pDevice->CreateDepthStencilView(pBaseTEXZB, &dsvDesc, &pBaseZB));
 }
 #endif

src/Layers/xrRenderPC_R4/r4_rendertarget.cpp

@@ -419,6 +419,8 @@ CRenderTarget::CRenderTarget()
 		u32 w = Device.dwWidth, h = Device.dwHeight;
 		rt_Position.create(r2_RT_P, w, h, D3DFMT_A16B16G16R16F, SampleCount);
 
+		rt_tempzb.create("$user$temp_zb", w, h, D3DFMT_D24S8);
+
 		if (RImplementation.o.dx10_msaa)
 			rt_MSAADepth.create(r2_RT_MSAAdepth, w, h, D3DFMT_D24S8, SampleCount);
 

src/Layers/xrRenderPC_R4/r4_rendertarget.h

@@ -154,6 +154,8 @@ class CRenderTarget : public IRender_Target
 	ref_rt rt_ssfx_accum;
 	ref_rt rt_ssfx_hud;
 
+	ref_rt rt_tempzb;
+
 	ref_shader s_ssfx_dumb;
 
 	//	Igor: for async screenshots