Jump to content
  • Advertisement
Sign in to follow this  
Migi0027

DX11 DX11 - Swap Chain - Slow Engine

This topic is 1865 days old which is more than the 365 day threshold we allow for new replies. Please post a new topic.

If you intended to correct an error in the post then please contact us.

Recommended Posts

Hi guys,

 

PS. FPS I GOT IN MY ENGINE: 50 - 70 fps, res: 1080x1920, system can run Crysis 3 at high settings, so that's not the problem.

 

Scene:

2zdx0ck.png

 

right now I'm facing another issue, which is the performance of my Engine. Now the problem is not my architecture, well at least I don't think so, so I tried running a Profiler.

 

Most of the performance was taken off in the initialization of course, but then later on in the render loop then rendering of the depth, normal, diffuse maps are quite fast, relatively to other things. Now the real problem comes when the swapchain->present(0,0) is called. As i understand it takes a long time because it's waiting for the previous frame to finish, right?

 

I have head some rumors about that if statements in a shader are quite weird, because even though it is a negative statement, false, it will still semi-run/check all the contents inside the if statement, which makes it quite slow, is this true or just some rubbish?

 

Also my FPS is NOT affected if I change my regular shader for all the objects (tried to remove all so only the positions were calculated in world space and then returned a white color), but then if I changed my Post Processing shader to a very simple version which ONLY returns the diffuse map, my FPS is boosted 2x - 3x times! But why? (Shader is below if you're interested, but there are still errors).

 

Texture2D t_dffmap : register(t0);
Texture2D t_depthmap : register(t1);
Texture2D t_normalmap : register(t2);
Texture2D t_random : register(t3);
Texture2D t_blmextract : register(t4);
Texture2D t_megaparticles : register(t5);
Texture2D t_fractalnoise : register(t6);
Texture2D t_softp : register(t7);
Texture2D t_softp_depth : register(t8);
Texture2D t_shadowmap : register(t9);
Texture2D t_glowmap : register(t10);
SamplerState ss;

cbuffer PARAMSBUFFER : register(b0)
{
	float time;
	float blur;
	float bloomExtract;
	float bloom;
	float pixelDisortion;
	float pixelDisorterAmount;
	float ssao;
	float bluramount;
	float megaparticles;
	float radialblur;
	float radial_start;
	float radial_width;
	float2 radial_center;
	float fractalNoise;
	float glowmap;

	matrix view;
};

cbuffer BloomBuffer : register(b1)
{
	float BloomThreshold;
	float BloomSaturation;
	float BaseSaturation;
	float BloomIntensity;
	float BaseIntensity;
};

cbuffer SSAOBuffer : register(b2)
{
	float g_scale;
	float g_bias;
	float g_sample_rad;
	float g_intensity;
	float ssaoIterations;
	float3 pppspace;
};

cbuffer GODRAYBuffer : register(b3)
{
	float3 LightPosition;
	float pad;
	matrix WorldViewProjection;
	
	float GOD_Density;
	float GOD_Weight;
	float GOD_Decay;
	float GOD_Exposure;
	float GOD_NUM_SAMPLES;
	float GodRays;
	float2 ppad;
};

struct VS_Output
{  
    float4 Pos : SV_POSITION;              
    float2 Tex : TEXCOORD0;
	float2 LightPos : TEXCOORD1;	
};
 
VS_Output VShader(uint id : SV_VertexID)
{
    VS_Output Output;
    Output.Tex = float2((id << 1) & 2, id & 2);
    Output.Pos = float4(Output.Tex * float2(2,-2) + float2(-1,1), 0, 1);
	
    return Output;
}

// Helper for modifying the saturation of a color.
float4 AdjustSaturation(float4 color, float saturation)
{
    // The constants 0.3, 0.59, and 0.11 are chosen because the
    // human eye is more sensitive to green light, and less to blue.
    float grey = dot(color, float3(0.3, 0.59, 0.11));

    return lerp(grey, color, saturation);
}

// Ambient Occlusion Stuff --------------------------------------------------

float3 getPosition(in float2 uv)
{
	return mul( t_depthmap.Sample(ss, uv).xyz, view);
}

float3 getNormal(in float2 uv)
{
	return normalize(t_normalmap.Sample(ss, uv).xyz * 2.0f - 1.0f);
}

float2 getRandom(in float2 uv)
{
	return normalize( mul(t_random.Sample(ss, float2(800, 600) * uv / float2(64, 64)).xy * 2.0f - 1.0f, view) );
}

float doAmbientOcclusion(in float2 tcoord,in float2 uv, in float3 p, in float3 cnorm)
{
	float3 diff = getPosition(tcoord + uv) - p;
	const float3 v = normalize(diff);
	const float d = length(diff)*g_scale;
	return max(0.0,dot(cnorm,v)-g_bias)*(1.0/(1.0+d))*g_intensity;
}

// End

float4 PShader(VS_Output input) : SV_TARGET
{
	if (bloomExtract == 1)
	{
		// Look up the original image color.
		float4 c = t_dffmap.Sample(ss, input.Tex);

		// Adjust it to keep only values brighter than the specified threshold.
		return saturate((c - BloomThreshold) / (1 - BloomThreshold));
	}

	float4 color = float4(1.0f, 1.0f, 1.0f, 1.0f);
	
	if (pixelDisortion == 1)
	{
		// Distortion factor
		float NoiseX = pixelDisorterAmount * (time/1000) * sin(input.Tex.x * input.Tex.y+time/1000);
		NoiseX=fmod(NoiseX,8) * fmod(NoiseX,4); 

		// Use our distortion factor to compute how much it will affect each
		// texture coordinate
		float DistortX = fmod(NoiseX,5);
		float DistortY = fmod(NoiseX,5+0.002);
 
		// Create our new texture coordinate based on our distortion factor
		input.Tex = float2(DistortX,DistortY);
	}

	if (fractalNoise == 1)
	{
		float offset = saturate((t_fractalnoise.Sample(ss, input.Tex) / 10.0f));

		input.Tex += 1 * (t_fractalnoise.Sample(ss, input.Tex).xy - 0.5)/15;
	}

	float4 dffMAP = t_dffmap.Sample(ss, input.Tex);

	if (megaparticles == 1)
	{
		dffMAP.a = 0.0f;

		dffMAP += t_megaparticles.Sample(ss, input.Tex);
	}

	color = dffMAP;

	if(bloom == 1)
	{
		// Look up the bloom and original base image colors.
		float4 cbloom = t_blmextract.Sample(ss, input.Tex);
		float4 base = color;
    
		// Adjust color saturation and intensity.
		cbloom = AdjustSaturation(cbloom, BloomSaturation) * BloomIntensity;
		base = AdjustSaturation(base, BaseSaturation) * BaseIntensity;
    
		// Darken down the base image in areas where there is a lot of bloom,
		// to prevent things looking excessively burned-out.
		base *= (1 - saturate(cbloom));
    
		// Combine the two images.
		color = base + cbloom;
	}

	if (blur == 1)
	{
		float hblur[17] = {0, -1, 2, -3, 4, -5, 6, -7, 8, -9, 10, -11, 12, -13, 14, -15, 16};

		int i = 0;
		for(;i < bluramount;)
		{
			color += t_dffmap.Sample(ss, input.Tex + float2(0.002f * hblur[i+1],0.002f * hblur));

			i++;
		}

		i++;
		color = color / i;
	}
	else if (radialblur == 1)
	{
		const int nsamples = 16;

		input.Tex -= 0.5;
    
		for(int i=0; i<nsamples; i++) 
		{
    		float scale = radial_start + radial_width*(i/(float) (nsamples-1));
    		color += t_dffmap.Sample(ss, input.Tex.xy*scale + radial_center );
   		}
   		color /= nsamples;
	}
	
	if (ssao == 1)
	{
		// Apply SSAO

		const float2 vec[4] = {float2(1,0),float2(-1,0),
				float2(0,1),float2(0,-1)};

		float3 p = getPosition(input.Tex);
		float3 n = getNormal(input.Tex);
		float2 rand = getRandom(input.Tex);

		float ao = 0.0f;
		float rad = g_sample_rad/p.z; // g_s_r

		//**SSAO Calculation**//
		int iterations = ssaoIterations;
		for (int j = 0; j < iterations; ++j)
		{
		  float2 coord1 = reflect(vec[j],rand)*rad;
		  float2 coord2 = float2(coord1.x*0.707 - coord1.y*0.707,
					  coord1.x*0.707 + coord1.y*0.707);
  
		  ao += doAmbientOcclusion(input.Tex,coord1*0.25, p, n);
		  ao += doAmbientOcclusion(input.Tex,coord2*0.5, p, n);
		  ao += doAmbientOcclusion(input.Tex,coord1*0.75, p, n);
		  ao += doAmbientOcclusion(input.Tex,coord2, p, n);
		}
		ao/=(float)iterations*4.0;
		color.rgb *= ao;
	}

	// Soft Particles
	float pDepth = t_softp_depth.Sample(ss, input.Tex);
	float wDepth = t_depthmap.Sample(ss, input.Tex);
	float twD = t_depthmap.Sample(ss, input.Tex);

	if ((wDepth < pDepth) || twD == 0)
	{
		float4 pColor = t_softp.Sample(ss, input.Tex);

		if (twD != 0)
			pColor.a = saturate((wDepth - pDepth) * 1);

		color += pColor;
	}
	// End

	if (glowmap == 1)
	{
		color += t_glowmap.Sample(ss, input.Tex);
	}

	if (GodRays == 1)
	{
		float2 deltaTexCoord = (input.Tex - input.LightPos.xy);  
		deltaTexCoord *= GOD_Density / GOD_NUM_SAMPLES;  
		//float4 color = t_dffmap.Sample(ss, input.Tex);
		float illuminationDecay = 1.0f;  
		for (int i = 0; i < GOD_NUM_SAMPLES; i++)  
		{  
			input.Tex -= deltaTexCoord;  
			float4 sample = t_dffmap.Sample(ss, input.Tex);
			sample *= illuminationDecay * GOD_Weight;  
			color += sample;  
			illuminationDecay *= GOD_Decay;  
		}  

		return color * GOD_Exposure;  
	}

	return color;
}

 

 

Now I understand that in GameDev there are many experienced programmers in graphics, so now I ask them/you, what can speed up an engine, what should I avoid? Tricks?

 

And that's basically it, thanks for taking interest! happy.png

Share this post


Link to post
Share on other sites
Advertisement

1. You are most obviously fillrate-bound. Post the FPS in lower resolutions (e.g. 640x480).

 

2. You took a shorter / simpler route and created an uber-shader. That's great during debugging/development, but as you noticed, it has a negative impact.

 

3. It is very easy to check the impact of conditions. Just create a separate technique/shader pair that will have only single codepath (say - just bloom), without any conditions whatsoever.

 

4. Make sure VSync is off.  With 52 , it doesn't look like VSync is On, but better safe than sorry...

 

Of course, as always, there will be 10 other things that impact FPS (many of them on the CPU side - AI, pathfinding, ...) , but let's first address those that have biggest impact.

Share this post


Link to post
Share on other sites

You can put them in the same hlsl file, as long as you're willing to compile it more than once.

 

You simply swap tests like "if (blur == 1) { ... }" for "#if defined(BLUR) ... #endif" and compile once with "/D BLUR" on the command line, once with "/D SSAO", etc. You can also set the defines in code if you're compiling shaders at runtime.

 

You then pick the correct shader to use, instead of setting a constant.

Share this post


Link to post
Share on other sites

SSAO and god rays can be very pixel heavy effects and I'm guessing you're doing them at full resolution (1920x1080).  Even full screen blurs can put a fair amount of pressure on fill rate at high resolutions.  When you take into account that more than likely every one of your branches is being evaluated even if the conditions are false, this could be adding up to make a very expensive shader.

 

A lot of these effects are rendered to smaller render targets, such as something like 1/4 size of the backbuffer (experiment with the size to get a good image quality vs. performance trade off).  And as mentioned above, even though it's 2013 we still really need to be using the preprocessor for our branches rather than if statements.  My recommendation would be render SSAO to a small target by itself, then god rays to another small target by themselves, then have your big post process shader at the end composite those effects along with blurs and distortion etc. using #defines to turn effects on and off as needed.

Share this post


Link to post
Share on other sites

So I need to compile individual shaders for texturing, bump, parallax mapping?

 

How would I blend these together?

Share this post


Link to post
Share on other sites

If statements can be cheap in hlsl, if there's no branch involved and the code you execute is simple. For example this if statement is a cheap one:

 

if (x > 7) x = 7;

 

They are also free if the condition can be evaluated at compile time.

 

They get expensive when the extra code that gets executed is significant, because the compiler will generally execute the code anyway and multiply the result by either 0 or 1 depending on the result of the if.

 

You can also ask the compiler to [branch] instead of evaluating the whole thing and throw away the result. The expense of that depends on things like what pattern of pixels goes down each path, but it can be beneficial if you avoid executing the extra code a lot of the time. While the compiler will sometimes automatically decide to do a real branch, you're best off specifying it yourself as you get extra errors back if if it can't do a branch due to texturing issues (i.e. tex2D vs tex2Dlod).

 

Your best option when optimizing is to use a tool like GPU Shader Analyzer to see what instructions get generated, as well as profiling the performance yourself, because if statement performance depends on the input data.

Share this post


Link to post
Share on other sites

Ok, now I've improved the frame rate a bit, so basically what I do is that I have an individual material for each mesh, (a shader) which can be modified by the user on creation. So this also helped me to escape the fixed shadings. Now the only problem is that I need to write a class that can parse any kind of shader with it's needs, because some shaders needs a specific input and some don't, and the class needs to detect that.

 

And a funny note, whilst doing this I lost some shader data, basically my whole post processing shader, because I closed Visual Studio without undoing, but then I realized that I had a copy here in this forum ohmy.png

Share this post


Link to post
Share on other sites
Sign in to follow this  

  • Advertisement
  • Advertisement
  • Popular Tags

  • Similar Content

    • By Void
      Hi, I'm trying to do a comparision with DirectInput GUID e.g GUID_XAxis, GUID_YAxis from a value I get from GetProperty
      eg
      DIPROPRANGE propRange;

      DIJoystick->GetProperty (DIPROP_RANGE, &propRange.diph);
      // This will crash
      if (GUID_XAxis == MAKEDIPROP (propRange.diph.dwObj))
        ;

      How should I be comparing the GUID from GetProperty?
    • By MikhailGorobets
      I have a problem with SSAO. On left hand black area.
      Code shader:
      Texture2D<uint> texGBufferNormal : register(t0); Texture2D<float> texGBufferDepth : register(t1); Texture2D<float4> texSSAONoise : register(t2); float3 GetUV(float3 position) { float4 vp = mul(float4(position, 1.0), ViewProject); vp.xy = float2(0.5, 0.5) + float2(0.5, -0.5) * vp.xy / vp.w; return float3(vp.xy, vp.z / vp.w); } float3 GetNormal(in Texture2D<uint> texNormal, in int3 coord) { return normalize(2.0 * UnpackNormalSphermap(texNormal.Load(coord)) - 1.0); } float3 GetPosition(in Texture2D<float> texDepth, in int3 coord) { float4 position = 1.0; float2 size; texDepth.GetDimensions(size.x, size.y); position.x = 2.0 * (coord.x / size.x) - 1.0; position.y = -(2.0 * (coord.y / size.y) - 1.0); position.z = texDepth.Load(coord); position = mul(position, ViewProjectInverse); position /= position.w; return position.xyz; } float3 GetPosition(in float2 coord, float depth) { float4 position = 1.0; position.x = 2.0 * coord.x - 1.0; position.y = -(2.0 * coord.y - 1.0); position.z = depth; position = mul(position, ViewProjectInverse); position /= position.w; return position.xyz; } float DepthInvSqrt(float nonLinearDepth) { return 1 / sqrt(1.0 - nonLinearDepth); } float GetDepth(in Texture2D<float> texDepth, float2 uv) { return texGBufferDepth.Sample(samplerPoint, uv); } float GetDepth(in Texture2D<float> texDepth, int3 screenPos) { return texGBufferDepth.Load(screenPos); } float CalculateOcclusion(in float3 position, in float3 direction, in float radius, in float pixelDepth) { float3 uv = GetUV(position + radius * direction); float d1 = DepthInvSqrt(GetDepth(texGBufferDepth, uv.xy)); float d2 = DepthInvSqrt(uv.z); return step(d1 - d2, 0) * min(1.0, radius / abs(d2 - pixelDepth)); } float GetRNDTexFactor(float2 texSize) { float width; float height; texGBufferDepth.GetDimensions(width, height); return float2(width, height) / texSize; } float main(FullScreenPSIn input) : SV_TARGET0 { int3 screenPos = int3(input.Position.xy, 0); float depth = DepthInvSqrt(GetDepth(texGBufferDepth, screenPos)); float3 normal = GetNormal(texGBufferNormal, screenPos); float3 position = GetPosition(texGBufferDepth, screenPos) + normal * SSAO_NORMAL_BIAS; float3 random = normalize(2.0 * texSSAONoise.Sample(samplerNoise, input.Texcoord * GetRNDTexFactor(SSAO_RND_TEX_SIZE)).rgb - 1.0); float SSAO = 0; [unroll] for (int index = 0; index < SSAO_KERNEL_SIZE; index++) { float3 dir = reflect(SamplesKernel[index].xyz, random); SSAO += CalculateOcclusion(position, dir * sign(dot(dir, normal)), SSAO_RADIUS, depth); } return 1.0 - SSAO / SSAO_KERNEL_SIZE; }  



    • By MarcusAseth
      I've been following this tutorial -> https://www.3dgep.com/introduction-to-directx-11/#The_Main_Function , did all the steps,and I ended up with the main.cpp you can see below.
      The problem is the call at line 516 
      g_d3dDeviceContext->UpdateSubresource(g_d3dConstantBuffers[CB_Frame], 0, nullptr, &g_ViewMatrix, 0, 0); which is crashing the program, and the very odd thing is that the first time trough it works fine, it crash the app the second time it is called...
      Can someone help me understand why? 😕    I have no idea...
      #include <Direct3D_11PCH.h> //Shaders using namespace DirectX; // Globals //Window const unsigned g_WindowWidth = 1024; const unsigned g_WindowHeight = 768; const char* g_WindowClassName = "DirectXWindowClass"; const char* g_WindowName = "DirectX 11"; HWND g_WinHnd = nullptr; const bool g_EnableVSync = true; //Device and SwapChain ID3D11Device* g_d3dDevice = nullptr; ID3D11DeviceContext* g_d3dDeviceContext = nullptr; IDXGISwapChain* g_d3dSwapChain = nullptr; //RenderTarget view ID3D11RenderTargetView* g_d3dRenderTargerView = nullptr; //DepthStencil view ID3D11DepthStencilView* g_d3dDepthStencilView = nullptr; //Depth Buffer Texture ID3D11Texture2D* g_d3dDepthStencilBuffer = nullptr; // Define the functionality of the depth/stencil stages ID3D11DepthStencilState* g_d3dDepthStencilState = nullptr; // Define the functionality of the rasterizer stage ID3D11RasterizerState* g_d3dRasterizerState = nullptr; D3D11_VIEWPORT g_Viewport{}; //Vertex Buffer data ID3D11InputLayout* g_d3dInputLayout = nullptr; ID3D11Buffer* g_d3dVertexBuffer = nullptr; ID3D11Buffer* g_d3dIndexBuffer = nullptr; //Shader Data ID3D11VertexShader* g_d3dVertexShader = nullptr; ID3D11PixelShader* g_d3dPixelShader = nullptr; //Shader Resources enum ConstantBuffer { CB_Application, CB_Frame, CB_Object, NumConstantBuffers }; ID3D11Buffer* g_d3dConstantBuffers[ConstantBuffer::NumConstantBuffers]; //Demo parameter XMMATRIX g_WorldMatrix; XMMATRIX g_ViewMatrix; XMMATRIX g_ProjectionMatrix; // Vertex data for a colored cube. struct VertexPosColor { XMFLOAT3 Position; XMFLOAT3 Color; }; VertexPosColor g_Vertices[8] = { { XMFLOAT3(-1.0f, -1.0f, -1.0f), XMFLOAT3(0.0f, 0.0f, 0.0f) }, // 0 { XMFLOAT3(-1.0f, 1.0f, -1.0f), XMFLOAT3(0.0f, 1.0f, 0.0f) }, // 1 { XMFLOAT3(1.0f, 1.0f, -1.0f), XMFLOAT3(1.0f, 1.0f, 0.0f) }, // 2 { XMFLOAT3(1.0f, -1.0f, -1.0f), XMFLOAT3(1.0f, 0.0f, 0.0f) }, // 3 { XMFLOAT3(-1.0f, -1.0f, 1.0f), XMFLOAT3(0.0f, 0.0f, 1.0f) }, // 4 { XMFLOAT3(-1.0f, 1.0f, 1.0f), XMFLOAT3(0.0f, 1.0f, 1.0f) }, // 5 { XMFLOAT3(1.0f, 1.0f, 1.0f), XMFLOAT3(1.0f, 1.0f, 1.0f) }, // 6 { XMFLOAT3(1.0f, -1.0f, 1.0f), XMFLOAT3(1.0f, 0.0f, 1.0f) } // 7 }; WORD g_Indicies[36] = { 0, 1, 2, 0, 2, 3, 4, 6, 5, 4, 7, 6, 4, 5, 1, 4, 1, 0, 3, 2, 6, 3, 6, 7, 1, 5, 6, 1, 6, 2, 4, 0, 3, 4, 3, 7 }; //Forward Declaration LRESULT CALLBACK WindowProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam); bool LoadContent(); int Run(); void Update(float deltaTime); void Clear(const FLOAT clearColor[4], FLOAT clearDepth, UINT8 clearStencil); void Present(bool vSync); void Render(); void CleanUp(); int InitApplication(HINSTANCE hInstance, int cmdShow); int InitDirectX(HINSTANCE hInstance, BOOL vsync); int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR cmd, int cmdShow) { UNREFERENCED_PARAMETER(hPrevInstance); UNREFERENCED_PARAMETER(cmd); // Check for DirectX Math library support. if (!XMVerifyCPUSupport()) { MessageBox(nullptr, TEXT("Failed to verify DirectX Math library support."), nullptr, MB_OK); return -1; } if (InitApplication(hInstance, cmdShow) != 0) { MessageBox(nullptr, TEXT("Failed to create applicaiton window."), nullptr, MB_OK); return -1; } if (InitDirectX(hInstance, g_EnableVSync) != 0) { MessageBox(nullptr, TEXT("Failed to initialize DirectX."), nullptr, MB_OK); CleanUp(); return -1; } if (!LoadContent()) { MessageBox(nullptr, TEXT("Failed to load content."), nullptr, MB_OK); CleanUp(); return -1; } int returnCode = Run(); CleanUp(); return returnCode; } int Run() { MSG msg{}; static DWORD previousTime = timeGetTime(); static const float targetFramerate = 30.0f; static const float maxTimeStep = 1.0f / targetFramerate; while (msg.message != WM_QUIT) { if (PeekMessage(&msg, 0, 0, 0, PM_REMOVE)) { TranslateMessage(&msg); DispatchMessage(&msg); } else { DWORD currentTime = timeGetTime(); float deltaTime = (currentTime - previousTime) / 1000.0f; previousTime = currentTime; deltaTime = std::min<float>(deltaTime, maxTimeStep); Update(deltaTime); Render(); } } return static_cast<int>(msg.wParam); } LRESULT CALLBACK WindowProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam) { PAINTSTRUCT paintstruct; HDC hDC; switch (msg) { case WM_PAINT: { hDC = BeginPaint(hwnd, &paintstruct); EndPaint(hwnd, &paintstruct); }break; case WM_DESTROY: { PostQuitMessage(0); }break; default: return DefWindowProc(hwnd, msg, wParam, lParam); break; } return 0; } int InitApplication(HINSTANCE hInstance, int cmdShow) { //Register Window class WNDCLASSEX mainWindow{}; mainWindow.cbSize = sizeof(WNDCLASSEX); mainWindow.style = CS_HREDRAW | CS_VREDRAW; mainWindow.lpfnWndProc = &WindowProc; mainWindow.hInstance = hInstance; mainWindow.hCursor = LoadCursor(NULL, IDC_ARROW); mainWindow.hbrBackground = (HBRUSH)(COLOR_WINDOW + 1); mainWindow.lpszMenuName = nullptr; mainWindow.lpszClassName = g_WindowClassName; if (!RegisterClassEx(&mainWindow)) { return -1; } RECT client{ 0,0,g_WindowWidth,g_WindowHeight }; AdjustWindowRect(&client, WS_OVERLAPPEDWINDOW, false); // Create Window g_WinHnd = CreateWindowEx(NULL, g_WindowClassName, g_WindowName, WS_OVERLAPPEDWINDOW | WS_VISIBLE, CW_USEDEFAULT, CW_USEDEFAULT, client.right - client.left, client.bottom - client.top, nullptr, nullptr, hInstance, nullptr); if (!g_WinHnd) { return -1; } UpdateWindow(g_WinHnd); return 0; } int InitDirectX(HINSTANCE hInstance, BOOL vsync) { assert(g_WinHnd != nullptr); RECT client{}; GetClientRect(g_WinHnd, &client); unsigned int clientWidth = client.right - client.left; unsigned int clientHeight = client.bottom - client.top; //Direct3D Initialization HRESULT hr{}; //SwapChainDesc DXGI_RATIONAL refreshRate = vsync ? DXGI_RATIONAL{ 1, 60 } : DXGI_RATIONAL{ 0, 1 }; DXGI_SWAP_CHAIN_DESC swapChainDesc{}; swapChainDesc.BufferDesc.Width = clientWidth; swapChainDesc.BufferDesc.Height = clientHeight; swapChainDesc.BufferDesc.RefreshRate = refreshRate; swapChainDesc.BufferDesc.Format = DXGI_FORMAT_R8G8B8A8_UNORM; swapChainDesc.BufferDesc.Scaling = DXGI_MODE_SCALING_CENTERED; swapChainDesc.SampleDesc.Count = 1; swapChainDesc.SampleDesc.Quality = 0; swapChainDesc.BufferUsage = DXGI_USAGE_RENDER_TARGET_OUTPUT; swapChainDesc.BufferCount = 1; swapChainDesc.OutputWindow = g_WinHnd; swapChainDesc.Windowed = true; swapChainDesc.SwapEffect = DXGI_SWAP_EFFECT_DISCARD; UINT createDeviceFlags{}; #if _DEBUG createDeviceFlags = D3D11_CREATE_DEVICE_DEBUG; #endif //Feature levels const D3D_FEATURE_LEVEL features[]{ D3D_FEATURE_LEVEL_11_0 }; D3D_FEATURE_LEVEL featureLevel; hr = D3D11CreateDeviceAndSwapChain( nullptr, D3D_DRIVER_TYPE_HARDWARE, nullptr, createDeviceFlags, features, _countof(features), D3D11_SDK_VERSION, &swapChainDesc, &g_d3dSwapChain, &g_d3dDevice, &featureLevel, &g_d3dDeviceContext ); if (FAILED(hr)) { return -1; } //Render Target View ID3D11Texture2D* backBuffer; hr = g_d3dSwapChain->GetBuffer(0, __uuidof(ID3D11Texture2D), reinterpret_cast<void**>(&backBuffer)); if (FAILED(hr)) { return -1; } hr = g_d3dDevice->CreateRenderTargetView(backBuffer, nullptr, &g_d3dRenderTargerView); if (FAILED(hr)) { return -1; } SafeRelease(backBuffer); //Depth Stencil View D3D11_TEXTURE2D_DESC depthStencilBufferDesc{}; depthStencilBufferDesc.Width = clientWidth; depthStencilBufferDesc.Height = clientHeight; depthStencilBufferDesc.MipLevels = 1; depthStencilBufferDesc.ArraySize = 1; depthStencilBufferDesc.Format = DXGI_FORMAT_D24_UNORM_S8_UINT; depthStencilBufferDesc.SampleDesc.Count = 1; depthStencilBufferDesc.SampleDesc.Quality = 0; depthStencilBufferDesc.Usage = D3D11_USAGE_DEFAULT; depthStencilBufferDesc.BindFlags = D3D11_BIND_DEPTH_STENCIL; hr = g_d3dDevice->CreateTexture2D(&depthStencilBufferDesc, nullptr, &g_d3dDepthStencilBuffer); if (FAILED(hr)) { return -1; } hr = g_d3dDevice->CreateDepthStencilView(g_d3dDepthStencilBuffer, nullptr, &g_d3dDepthStencilView); if (FAILED(hr)) { return -1; } //Set States D3D11_DEPTH_STENCIL_DESC depthStencilStateDesc{}; depthStencilStateDesc.DepthEnable = true; depthStencilStateDesc.DepthWriteMask = D3D11_DEPTH_WRITE_MASK_ALL; depthStencilStateDesc.DepthFunc = D3D11_COMPARISON_LESS; depthStencilStateDesc.StencilEnable = false; hr = g_d3dDevice->CreateDepthStencilState(&depthStencilStateDesc, &g_d3dDepthStencilState); if (FAILED(hr)) { return -1; } D3D11_RASTERIZER_DESC rasterizerStateDesc{}; rasterizerStateDesc.FillMode = D3D11_FILL_SOLID; rasterizerStateDesc.CullMode = D3D11_CULL_BACK; rasterizerStateDesc.FrontCounterClockwise = FALSE; rasterizerStateDesc.DepthClipEnable = TRUE; rasterizerStateDesc.ScissorEnable = FALSE;; rasterizerStateDesc.MultisampleEnable = FALSE; hr = g_d3dDevice->CreateRasterizerState(&rasterizerStateDesc, &g_d3dRasterizerState); if (FAILED(hr)) { return -1; } //Set Viewport g_Viewport.Width = static_cast<float>(clientWidth); g_Viewport.Height = static_cast<float>(clientHeight); g_Viewport.TopLeftX = 0.0f; g_Viewport.TopLeftY = 0.0f; g_Viewport.MinDepth = 0.0f; g_Viewport.MaxDepth = 1.0f; return 0; } bool LoadContent() { //Load Shaders HRESULT hr; assert(g_d3dDevice); //VS ID3DBlob* vsBlob = nullptr; D3DReadFileToBlob(L"../Shaders/SimpleVertexShader.cso", &vsBlob); assert(vsBlob); hr = g_d3dDevice->CreateVertexShader(vsBlob->GetBufferPointer(), vsBlob->GetBufferSize(), nullptr, &g_d3dVertexShader); if (FAILED(hr)) { SafeRelease(vsBlob); return false; } //Create VS Input Layout D3D11_INPUT_ELEMENT_DESC vertexLayoutDesc[] = { { "POSITION", 0, DXGI_FORMAT_R32G32B32A32_FLOAT, 0, offsetof(VertexPosColor, Position), D3D11_INPUT_PER_VERTEX_DATA ,0 }, { "COLOR", 0, DXGI_FORMAT_R32G32B32A32_FLOAT, 0, offsetof(VertexPosColor, Color), D3D11_INPUT_PER_VERTEX_DATA ,0 } }; hr = g_d3dDevice->CreateInputLayout(vertexLayoutDesc, _countof(vertexLayoutDesc), vsBlob->GetBufferPointer(), vsBlob->GetBufferSize(), &g_d3dInputLayout); if (FAILED(hr)) { SafeRelease(vsBlob); return false; } SafeRelease(vsBlob); //PS ID3DBlob* psBlob = nullptr; D3DReadFileToBlob(L"../Shaders/SimplePixelShader.cso", &psBlob); assert(psBlob); hr = g_d3dDevice->CreatePixelShader(psBlob->GetBufferPointer(), psBlob->GetBufferSize(), nullptr, &g_d3dPixelShader); SafeRelease(psBlob); if (FAILED(hr)) { return false; } //Load Vertex Buffer D3D11_BUFFER_DESC vertexBufferDesc{}; vertexBufferDesc.ByteWidth = sizeof(VertexPosColor) * _countof(g_Vertices); vertexBufferDesc.Usage = D3D11_USAGE_DEFAULT; vertexBufferDesc.BindFlags = D3D11_BIND_VERTEX_BUFFER; D3D11_SUBRESOURCE_DATA resourceData{}; resourceData.pSysMem = g_Vertices; hr = g_d3dDevice->CreateBuffer(&vertexBufferDesc, &resourceData, &g_d3dVertexBuffer); if (FAILED(hr)) { return false; } //Load Index Buffer D3D11_BUFFER_DESC indexBufferDesc{}; indexBufferDesc.ByteWidth = sizeof(WORD) * _countof(g_Indicies); indexBufferDesc.Usage = D3D11_USAGE_DEFAULT; indexBufferDesc.BindFlags = D3D11_BIND_INDEX_BUFFER; resourceData.pSysMem = g_Indicies; hr = g_d3dDevice->CreateBuffer(&indexBufferDesc, &resourceData, &g_d3dIndexBuffer); if (FAILED(hr)) { return false; } //Load Constant Buffers D3D11_BUFFER_DESC cBufferDesc{}; cBufferDesc.ByteWidth = sizeof(XMMATRIX); cBufferDesc.Usage = D3D11_USAGE_DEFAULT; cBufferDesc.BindFlags = D3D11_BIND_CONSTANT_BUFFER; for (size_t bufferID = 0; bufferID < NumConstantBuffers; bufferID++) { hr = g_d3dDevice->CreateBuffer(&cBufferDesc, nullptr, &g_d3dConstantBuffers[bufferID]); if (FAILED(hr)) { return false; } } //Setup Projection Matrix RECT client{}; GetClientRect(g_WinHnd, &client); float clientWidth = static_cast<float>(client.right - client.left); float clientHeight = static_cast<float>(client.bottom - client.top); g_ProjectionMatrix = DirectX::XMMatrixPerspectiveFovLH(XMConvertToRadians(45.0f), clientWidth / clientHeight, 0.1f, 100.0f); g_d3dDeviceContext->UpdateSubresource(g_d3dConstantBuffers[CB_Application], 0, nullptr, &g_ProjectionMatrix, 0, 0); return true; } void Update(float deltaTime) { XMVECTOR eyePosition = XMVectorSet(0, 0, -10, 1); XMVECTOR focusPoint = XMVectorSet(0, 0, 0, 1); XMVECTOR upDirection = XMVectorSet(0, 1, 0, 0); g_ViewMatrix = DirectX::XMMatrixLookAtLH(eyePosition, focusPoint, upDirection); g_d3dDeviceContext->UpdateSubresource(g_d3dConstantBuffers[CB_Frame], 0, nullptr, &g_ViewMatrix, 0, 0); static float angle = 0.0f; angle += 90.0f * deltaTime; XMVECTOR rotationAxis = XMVectorSet(0, 1, 1, 0); g_WorldMatrix = DirectX::XMMatrixRotationAxis(rotationAxis, XMConvertToRadians(angle)); g_d3dDeviceContext->UpdateSubresource(g_d3dConstantBuffers[CB_Object], 0, nullptr, &g_WorldMatrix, 0, 0); } void Clear(const FLOAT clearColor[4], FLOAT clearDepth, UINT8 clearStencil) { g_d3dDeviceContext->ClearRenderTargetView(g_d3dRenderTargerView, clearColor); g_d3dDeviceContext->ClearDepthStencilView(g_d3dDepthStencilView, D3D11_CLEAR_DEPTH | D3D11_CLEAR_STENCIL, clearDepth, clearStencil); } void Present(bool vSync) { if (vSync) { g_d3dSwapChain->Present(1, 0); } else { g_d3dSwapChain->Present(0, 0); } } void Render() { assert(g_d3dDevice); assert(g_d3dDeviceContext); Clear(Colors::CornflowerBlue, 1.0f, 0); //IA const UINT vertexStride = sizeof(VertexPosColor); const UINT offset = 0; g_d3dDeviceContext->IASetVertexBuffers(0, 1, &g_d3dVertexBuffer, &vertexStride, &offset); g_d3dDeviceContext->IASetInputLayout(g_d3dInputLayout); g_d3dDeviceContext->IASetIndexBuffer(g_d3dIndexBuffer, DXGI_FORMAT_R16_UINT, 0); g_d3dDeviceContext->IASetPrimitiveTopology(D3D11_PRIMITIVE_TOPOLOGY_TRIANGLELIST); //VS g_d3dDeviceContext->VSSetShader(g_d3dVertexShader, nullptr, 0); g_d3dDeviceContext->VSGetConstantBuffers(0, NumConstantBuffers, g_d3dConstantBuffers); //RS g_d3dDeviceContext->RSSetState(g_d3dRasterizerState); g_d3dDeviceContext->RSSetViewports(1, &g_Viewport); //PS g_d3dDeviceContext->PSSetShader(g_d3dPixelShader, nullptr, 0); //OM g_d3dDeviceContext->OMSetRenderTargets(1, &g_d3dRenderTargerView, g_d3dDepthStencilView); g_d3dDeviceContext->OMSetDepthStencilState(g_d3dDepthStencilState, 1); //draw g_d3dDeviceContext->DrawIndexed(_countof(g_Indicies), 0, 0); Present(g_EnableVSync); } void CleanUp() { SafeRelease(g_d3dVertexShader); SafeRelease(g_d3dPixelShader); SafeRelease(g_d3dVertexBuffer); SafeRelease(g_d3dIndexBuffer); SafeRelease(g_d3dInputLayout); SafeRelease(g_d3dDepthStencilBuffer); for (size_t bufferID = 0; bufferID < NumConstantBuffers; bufferID++) { SafeRelease(g_d3dConstantBuffers[bufferID]); } SafeRelease(g_d3dDepthStencilState); SafeRelease(g_d3dRasterizerState); SafeRelease(g_d3dRenderTargerView); SafeRelease(g_d3dDepthStencilView); SafeRelease(g_d3dSwapChain); SafeRelease(g_d3dDeviceContext); SafeRelease(g_d3dDevice); }  
    • By MarcusAseth
      Hi guys, I'm trying to learn this stuff but running into some problems 😕
      I've compiled my .hlsl into a header file which contains the global variable with the precompiled shader data:
      //... // Approximately 83 instruction slots used #endif const BYTE g_vs[] = { 68, 88, 66, 67, 143, 82, 13, 236, 152, 133, 219, 113, 173, 135, 18, 87, 122, 208, 124, 76, 1, 0, 0, 0, 16, 76, 0, 0, 6, 0, //.... And now following the "Compiling at build time to header files" example at this msdn link , I've included the header files in my main.cpp and I'm trying to create the vertex shader like this:
      hr = g_d3dDevice->CreateVertexShader(g_vs, sizeof(g_vs), nullptr, &g_d3dVertexShader); if (FAILED(hr)) { return -1; } and this is failing, entering the if and returing -1.
      Can someone point out what I'm doing wrong? 😕 
    • By Toastmastern
      Hello everyone,
      After a few years of break from coding and my planet render game I'm giving it a go again from a different angle. What I'm struggling with now is that I have created a Frustum that works fine for now atleast, it does what it's supose to do alltho not perfect. But with the frustum came very low FPS, since what I'm doing right now just to see if the Frustum worked is to recreate the vertex buffer every frame that the camera detected movement. This is of course very costly and not the way to do it. Thats why I'm now trying to learn how to create a dynamic vertexbuffer instead and to map and unmap the vertexes, in the end my goal is to update only part of the vertexbuffer that is needed, but one step at a time ^^

      So below is my code which I use to create the Dynamic buffer. The issue is that I want the size of the vertex buffer to be big enough to handle bigger vertex buffers then just mPlanetMesh.vertices.size() due to more vertices being added later when I start to do LOD and stuff, the first render isn't the biggest one I will need.
      vertexBufferDesc.Usage = D3D11_USAGE_DYNAMIC; vertexBufferDesc.ByteWidth = mPlanetMesh.vertices.size(); vertexBufferDesc.BindFlags = D3D11_BIND_VERTEX_BUFFER; vertexBufferDesc.CPUAccessFlags = D3D11_CPU_ACCESS_WRITE; vertexBufferDesc.MiscFlags = 0; vertexBufferDesc.StructureByteStride = 0; vertexData.pSysMem = &mPlanetMesh.vertices[0]; vertexData.SysMemPitch = 0; vertexData.SysMemSlicePitch = 0; result = device->CreateBuffer(&vertexBufferDesc, &vertexData, &mVertexBuffer); if (FAILED(result)) { return false; } What happens is that the 
      result = device->CreateBuffer(&vertexBufferDesc, &vertexData, &mVertexBuffer); Makes it crash due to Access Violation. When I put the vertices.size() in it works without issues, but when I try to set it to like vertices.size() * 2 it crashes.
      I googled my eyes dry tonight but doesn't seem to find people with the same kind of issue, I've read that the vertex buffer can be bigger if needed. What I'm I doing wrong here?
       
      Best Regards and Thanks in advance
      Toastmastern
    • By yonisi
      Hi,
      I have a terrain engine where the terrain and water are on different grids. So I'm trying to render planar reflections of the terrain into the water grid. After reading some web pages and docs and also trying to learn from the RasterTek reflections demo and the small water bodies demo as well. What I do is as follows:
      1. Create a Reflection view matrix  - Technically I ONLY flip the camera position in the Y direction (Positive Y is up) and add to it 2 * waterLevel. Then I update the View matrix and I save that matrix for later. The code:
      void Camera::UpdateReflectionViewMatrix( float waterLevel ) { mBackupPosition = mPosition; mBackupLook = mLook; mPosition.y = -mPosition.y + 2.0f * waterLevel; //mLook.y = -mLook.y + 2.0f * waterLevel; UpdateViewMatrix(); mReflectionView = View(); } 2. I render the Terrain geometry to a 512x512 sized Render target by using the Reflection view matrix and an opposite culling (My Terrain is using front culling by nature so I'm using back culling for the Reflction render pass). Let me say that I checked with the Graphics debugger and the Reflection Render target looks "OK" at this stage (Picture attached). I don't know if the fact that the terrain is shown only at the top are of the texture is expected or not, but it seems OK.

      3. Render the Reflection texture into the water using projective texturing - I hope this step is OK code wise. Basically I'm sending to the shader the WorldReflectionViewProj matrix that was created at step 1 in order to use it for the projective texture coordinates, I then convert the position in the DS (Water and terrain are drawn with Tessellation) to the projective tex coords using that WorldReflectionViewProj matrix, then I sample the reflection texture after setting up the coordinates in the PS. Here is the code:
      //Send the ReflectionWorldViewProj matrix to the shader: XMStoreFloat4x4(&mPerFrameCB.Data.ReflectionWorldViewProj, XMMatrixTranspose( ( mWorld * pCam->GetReflectedView() ) * mProj )); //Setting up the Projective tex coords in the DS: Output.projTexPosition = mul(float4(worldPos.xyz, 1), g_ReflectionWorldViewProj); //Setting up the coords in the PS and sampling the reflection texture: float2 projTexCoords; projTexCoords.x = input.projTexPosition.x / input.projTexPosition.w / 2.0 + 0.5; projTexCoords.y = -input.projTexPosition.y / input.projTexPosition.w / 2.0 + 0.5; projTexCoords += normal.xz * 0.025; float4 reflectionColor = gReflectionMap.SampleLevel(SamplerClampLinear, projTexCoords, 0); texColor += reflectionColor * 0.25; I'll add that when compiling the PS I'm getting a warning on those dividing by input.projTexPosition.w for a possible float division by 0, I tried to add some offset or some minimum to the dividing term but that still not solved my issue.
      Here is the problem itself. At relatively flat view angles I'm seeing correct reflections (Or at least so it seems), but as I pitch the camera down, I'm seeing those artifacts which I have no idea where are coming from. I'm culling the terrain in the reflection render pass when it's lower than water height (I have heightmaps for that).
       
      Any help will be appreciated because I don't know what is wrong or where else to look.
    • By thmfrnk
      Hi,
      I am looking for a usefull commandline based texture compression tool with the rights to be able to ship with my application. It should have following caps:
      Supports all major image format as source files (jpeg, png, tga, bmp) Export as DDS Compression Formats BC1, BC2, BC3, BC4, BC7 I am actually using the nvdxt tool from Nvidia, but it does not support BC4 (which I need for one-channel 8bit textures). Everything else which I found wasn't really useful.
      Any suggestions?
      Thx
       
    • By trojanfoe
      I have been trying to create a BlendState for my UI text sprites so that they are both alpha-blended (so you can see them) and invert the pixel they are rendered over (again, so you can see them).
      In order to get alpha blending you would need:
      SrcBlend = SRC_ALPHA DestBlend = INV_SRC_ALPHA and in order to have inverted colours you would need something like:
      SrcBlend = INV_DEST_COLOR DestBlend = INV_SRC_COLOR and you can't have both.
      So I have come to the conclusion that it's not possible; am I right?
    • By Royma
      In traditional way, it needs 6 passes for a point light and many passes for cascaded shadow mapping to generate shadow maps. Recently I learnt a method that using a geometry shader to generate all the shadow maps in one pass.I specify a render target and a depth-stencil buffer which are both Texture2dArray in DirectX11.It looks much better than the traditional way I think.But after I implemented it, I found cascaded shadow mapping runs much slower than the traditional way.The fps slow down from 60 to 35.I don't know why.I guess may be I should do some culling or maybe the geometry shader is not efficient.
      I want to know the reason that I reduced the drawcalls from 8 to 1, but it runs slow down.Should I abandon this method or is there any way to optimize this method to run more efficiently than multi-pass rendering?
      Here is the gs code:

      [maxvertexcount(24)]
      void main(
          triangle DepthGsIn input[3] : SV_POSITION,
          inout TriangleStream< DepthPsIn > output
      )
      {
          for (uint k = 0; k < 8; ++k)
          {
              DepthPsIn element;
              element.RTIndex = k;
              for (uint i = 0; i < 3; ++i)
              {
                  float2 shadowSlopeBias = calculateShadowSlopeBias(input.normal, -g_cameras[k].world[1]);
                  float shadowBias = shadowSlopeBias.y * g_cameras[k].shadowMapParameters.x + g_cameras[k].shadowMapParameters.y;
                  element.position = input.position + shadowBias * g_cameras[k].world[1];
                  element.position = mul(element.position, g_cameras[k].viewProjection);
                  element.depth = element.position.z / element.position.w;
                  
                  output.Append(element);
              }
              output.RestartStrip();
          }
      }
       
    • By savail
      Hey,
      There are a few things which confuse me regarding DirectX 11 and HLSL shaders in general. I would be very grateful for your advice!
      1. Let's take for example a scene which invokes 2 totally separate pipeline render passes interchangeably. I understand I need to bind correct shaders for each of the render pass and potentially blend/depth or rasterizer state but what about resources such as Constant Buffers, Shader Resource Views and Unordered Access Views? Assuming that the second render pass uses none of the resources used by the first pass, do I still need to unbind the resources and clean pipeline state after first pass? Or is it ok to leave pipeline with unbound garbage since anything I'd need to bind for second pass would overwrite contents in the appropriate register slots anyway?
      2. Is it a good practice to assign register slots manually to all resources in HLSL?
      3. I thought about assigning manually register slots for every distinct render pass up to the maximum slot limit if neccessary. For example in 1 render pass I invoke 3 CS's, 2 VS's and 2 PS's and for all resources used by those shaders I try to fill as many register slots as neccessary and potentially reuse many times the same slot in shaders sharing the same resource. I was wondering if there is any performance penalty or gain when I bind all of my needed resources at the start of render pass and never gonna have to do it again until next render pass? - this means potentially binding a lot of registers and having excessive number of bound resources for every shader that is run.
      4. Is it a good practice to create a separate include file for every resource that occurs in >= 2 shader files or is it better to duplicate the declarations? In first case, the code is imo easier to maintain and edit but might be harder to read if there's too many includes. I've come up with a compromise between these 2 like this: create a separate include file for every CB that occurs in >= 2 shader files and a separate include file for every sampler I ever need to use. All other resources like srvs and uavs I prefer to duplicate in multiple shaders because they take much less space than CB for example... I'm not sure however if that's a good practice
  • Advertisement
  • Popular Now

  • Forum Statistics

    • Total Topics
      631395
    • Total Posts
      2999758
×

Important Information

By using GameDev.net, you agree to our community Guidelines, Terms of Use, and Privacy Policy.

Participate in the game development conversation and more when you create an account on GameDev.net!

Sign me up!