mirror of
https://github.com/ncblakely/GiantsTools
synced 2024-11-22 14:15:37 +01:00
607 lines
18 KiB
C++
607 lines
18 KiB
C++
//--------------------------------------------------------------------------------------
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// File: BasicPostProcess.cpp
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//
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// Copyright (c) Microsoft Corporation. All rights reserved.
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// Licensed under the MIT License.
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//
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// http://go.microsoft.com/fwlink/?LinkId=248929
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//--------------------------------------------------------------------------------------
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#include "pch.h"
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#include "PostProcess.h"
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#include "BufferHelpers.h"
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#include "CommonStates.h"
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#include "DirectXHelpers.h"
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#include "AlignedNew.h"
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#include "DemandCreate.h"
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#include "SharedResourcePool.h"
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using namespace DirectX;
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using Microsoft::WRL::ComPtr;
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namespace
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{
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constexpr int c_MaxSamples = 16;
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constexpr int Dirty_ConstantBuffer = 0x01;
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constexpr int Dirty_Parameters = 0x02;
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// Constant buffer layout. Must match the shader!
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__declspec(align(16)) struct PostProcessConstants
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{
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XMVECTOR sampleOffsets[c_MaxSamples];
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XMVECTOR sampleWeights[c_MaxSamples];
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};
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static_assert((sizeof(PostProcessConstants) % 16) == 0, "CB size not padded correctly");
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// 2-parameter Gaussian distribution given standard deviation (rho)
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inline float GaussianDistribution(float x, float y, float rho) noexcept
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{
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return expf(-(x * x + y * y) / (2 * rho * rho)) / sqrtf(2 * XM_PI * rho * rho);
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}
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}
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// Include the precompiled shader code.
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namespace
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{
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#if defined(_XBOX_ONE) && defined(_TITLE)
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#include "Shaders/Compiled/XboxOnePostProcess_VSQuad.inc"
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#include "Shaders/Compiled/XboxOnePostProcess_PSCopy.inc"
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#include "Shaders/Compiled/XboxOnePostProcess_PSMonochrome.inc"
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#include "Shaders/Compiled/XboxOnePostProcess_PSSepia.inc"
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#include "Shaders/Compiled/XboxOnePostProcess_PSDownScale2x2.inc"
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#include "Shaders/Compiled/XboxOnePostProcess_PSDownScale4x4.inc"
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#include "Shaders/Compiled/XboxOnePostProcess_PSGaussianBlur5x5.inc"
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#include "Shaders/Compiled/XboxOnePostProcess_PSBloomExtract.inc"
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#include "Shaders/Compiled/XboxOnePostProcess_PSBloomBlur.inc"
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#else
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#include "Shaders/Compiled/PostProcess_VSQuad.inc"
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#include "Shaders/Compiled/PostProcess_PSCopy.inc"
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#include "Shaders/Compiled/PostProcess_PSMonochrome.inc"
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#include "Shaders/Compiled/PostProcess_PSSepia.inc"
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#include "Shaders/Compiled/PostProcess_PSDownScale2x2.inc"
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#include "Shaders/Compiled/PostProcess_PSDownScale4x4.inc"
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#include "Shaders/Compiled/PostProcess_PSGaussianBlur5x5.inc"
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#include "Shaders/Compiled/PostProcess_PSBloomExtract.inc"
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#include "Shaders/Compiled/PostProcess_PSBloomBlur.inc"
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#endif
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}
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namespace
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{
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struct ShaderBytecode
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{
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void const* code;
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size_t length;
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};
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const ShaderBytecode pixelShaders[] =
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{
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{ PostProcess_PSCopy, sizeof(PostProcess_PSCopy) },
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{ PostProcess_PSMonochrome, sizeof(PostProcess_PSMonochrome) },
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{ PostProcess_PSSepia, sizeof(PostProcess_PSSepia) },
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{ PostProcess_PSDownScale2x2, sizeof(PostProcess_PSDownScale2x2) },
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{ PostProcess_PSDownScale4x4, sizeof(PostProcess_PSDownScale4x4) },
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{ PostProcess_PSGaussianBlur5x5, sizeof(PostProcess_PSGaussianBlur5x5) },
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{ PostProcess_PSBloomExtract, sizeof(PostProcess_PSBloomExtract) },
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{ PostProcess_PSBloomBlur, sizeof(PostProcess_PSBloomBlur) },
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};
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static_assert(_countof(pixelShaders) == BasicPostProcess::Effect_Max, "array/max mismatch");
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// Factory for lazily instantiating shaders.
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class DeviceResources
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{
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public:
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DeviceResources(_In_ ID3D11Device* device)
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: stateObjects(device),
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mDevice(device),
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mVertexShader{},
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mPixelShaders{},
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mMutex{}
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{ }
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// Gets or lazily creates the vertex shader.
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ID3D11VertexShader* GetVertexShader()
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{
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return DemandCreate(mVertexShader, mMutex, [&](ID3D11VertexShader** pResult) -> HRESULT
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{
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HRESULT hr = mDevice->CreateVertexShader(PostProcess_VSQuad, sizeof(PostProcess_VSQuad), nullptr, pResult);
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if (SUCCEEDED(hr))
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SetDebugObjectName(*pResult, "BasicPostProcess");
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return hr;
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});
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}
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// Gets or lazily creates the specified pixel shader.
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ID3D11PixelShader* GetPixelShader(unsigned int shaderIndex)
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{
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assert(shaderIndex < BasicPostProcess::Effect_Max);
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_Analysis_assume_(shaderIndex < BasicPostProcess::Effect_Max);
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return DemandCreate(mPixelShaders[shaderIndex], mMutex, [&](ID3D11PixelShader** pResult) -> HRESULT
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{
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HRESULT hr = mDevice->CreatePixelShader(pixelShaders[shaderIndex].code, pixelShaders[shaderIndex].length, nullptr, pResult);
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if (SUCCEEDED(hr))
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SetDebugObjectName(*pResult, "BasicPostProcess");
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return hr;
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});
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}
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CommonStates stateObjects;
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protected:
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ComPtr<ID3D11Device> mDevice;
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ComPtr<ID3D11VertexShader> mVertexShader;
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ComPtr<ID3D11PixelShader> mPixelShaders[BasicPostProcess::Effect_Max];
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std::mutex mMutex;
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};
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}
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class BasicPostProcess::Impl : public AlignedNew<PostProcessConstants>
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{
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public:
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Impl(_In_ ID3D11Device* device);
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void Process(_In_ ID3D11DeviceContext* deviceContext, std::function<void __cdecl()>& setCustomState);
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void SetConstants(bool value = true) noexcept { mUseConstants = value; mDirtyFlags = INT_MAX; }
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void SetDirtyFlag() noexcept { mDirtyFlags = INT_MAX; }
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// Fields.
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PostProcessConstants constants;
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BasicPostProcess::Effect fx;
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ComPtr<ID3D11ShaderResourceView> texture;
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unsigned texWidth;
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unsigned texHeight;
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float guassianMultiplier;
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float bloomSize;
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float bloomBrightness;
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float bloomThreshold;
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bool bloomHorizontal;
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private:
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bool mUseConstants;
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int mDirtyFlags;
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void DownScale2x2();
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void DownScale4x4();
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void GaussianBlur5x5(float multiplier);
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void Bloom(bool horizontal, float size, float brightness);
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ConstantBuffer<PostProcessConstants> mConstantBuffer;
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// Per-device resources.
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std::shared_ptr<DeviceResources> mDeviceResources;
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static SharedResourcePool<ID3D11Device*, DeviceResources> deviceResourcesPool;
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};
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// Global pool of per-device BasicPostProcess resources.
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SharedResourcePool<ID3D11Device*, DeviceResources> BasicPostProcess::Impl::deviceResourcesPool;
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// Constructor.
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BasicPostProcess::Impl::Impl(_In_ ID3D11Device* device)
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: constants{},
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fx(BasicPostProcess::Copy),
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texWidth(0),
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texHeight(0),
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guassianMultiplier(1.f),
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bloomSize(1.f),
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bloomBrightness(1.f),
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bloomThreshold(0.25f),
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bloomHorizontal(true),
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mUseConstants(false),
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mDirtyFlags(INT_MAX),
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mConstantBuffer(device),
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mDeviceResources(deviceResourcesPool.DemandCreate(device))
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{
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if (device->GetFeatureLevel() < D3D_FEATURE_LEVEL_10_0)
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{
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throw std::exception("BasicPostProcess requires Feature Level 10.0 or later");
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}
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SetDebugObjectName(mConstantBuffer.GetBuffer(), "BasicPostProcess");
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}
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// Sets our state onto the D3D device.
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void BasicPostProcess::Impl::Process(
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_In_ ID3D11DeviceContext* deviceContext,
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std::function<void __cdecl()>& setCustomState)
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{
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// Set the texture.
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ID3D11ShaderResourceView* textures[1] = { texture.Get() };
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deviceContext->PSSetShaderResources(0, 1, textures);
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auto sampler = mDeviceResources->stateObjects.LinearClamp();
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deviceContext->PSSetSamplers(0, 1, &sampler);
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// Set state objects.
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deviceContext->OMSetBlendState(mDeviceResources->stateObjects.Opaque(), nullptr, 0xffffffff);
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deviceContext->OMSetDepthStencilState(mDeviceResources->stateObjects.DepthNone(), 0);
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deviceContext->RSSetState(mDeviceResources->stateObjects.CullNone());
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// Set shaders.
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auto vertexShader = mDeviceResources->GetVertexShader();
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auto pixelShader = mDeviceResources->GetPixelShader(fx);
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deviceContext->VSSetShader(vertexShader, nullptr, 0);
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deviceContext->PSSetShader(pixelShader, nullptr, 0);
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// Set constants.
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if (mUseConstants)
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{
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if (mDirtyFlags & Dirty_Parameters)
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{
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mDirtyFlags &= ~Dirty_Parameters;
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mDirtyFlags |= Dirty_ConstantBuffer;
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switch (fx)
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{
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case DownScale_2x2:
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DownScale2x2();
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break;
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case DownScale_4x4:
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DownScale4x4();
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break;
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case GaussianBlur_5x5:
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GaussianBlur5x5(guassianMultiplier);
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break;
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case BloomExtract:
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constants.sampleWeights[0] = XMVectorReplicate(bloomThreshold);
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break;
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case BloomBlur:
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Bloom(bloomHorizontal, bloomSize, bloomBrightness);
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break;
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default:
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break;
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}
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}
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#if defined(_XBOX_ONE) && defined(_TITLE)
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void *grfxMemory;
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mConstantBuffer.SetData(deviceContext, constants, &grfxMemory);
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Microsoft::WRL::ComPtr<ID3D11DeviceContextX> deviceContextX;
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ThrowIfFailed(deviceContext->QueryInterface(IID_GRAPHICS_PPV_ARGS(deviceContextX.GetAddressOf())));
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auto buffer = mConstantBuffer.GetBuffer();
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deviceContextX->PSSetPlacementConstantBuffer(0, buffer, grfxMemory);
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#else
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if (mDirtyFlags & Dirty_ConstantBuffer)
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{
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mDirtyFlags &= ~Dirty_ConstantBuffer;
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mConstantBuffer.SetData(deviceContext, constants);
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}
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// Set the constant buffer.
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auto buffer = mConstantBuffer.GetBuffer();
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deviceContext->PSSetConstantBuffers(0, 1, &buffer);
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#endif
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}
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if (setCustomState)
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{
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setCustomState();
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}
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// Draw quad.
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deviceContext->IASetInputLayout(nullptr);
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deviceContext->IASetPrimitiveTopology(D3D11_PRIMITIVE_TOPOLOGY_TRIANGLELIST);
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deviceContext->Draw(3, 0);
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}
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void BasicPostProcess::Impl::DownScale2x2()
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{
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mUseConstants = true;
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if (!texWidth || !texHeight)
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{
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throw std::exception("Call SetSourceTexture before setting post-process effect");
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}
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float tu = 1.0f / float(texWidth);
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float tv = 1.0f / float(texHeight);
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// Sample from the 4 surrounding points. Since the center point will be in the exact
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// center of 4 texels, a 0.5f offset is needed to specify a texel center.
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auto ptr = reinterpret_cast<XMFLOAT4*>(constants.sampleOffsets);
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for (int y = 0; y < 2; ++y)
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{
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for (int x = 0; x < 2; ++x)
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{
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ptr->x = (float(x) - 0.5f) * tu;
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ptr->y = (float(y) - 0.5f) * tv;
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++ptr;
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}
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}
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}
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void BasicPostProcess::Impl::DownScale4x4()
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{
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mUseConstants = true;
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if (!texWidth || !texHeight)
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{
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throw std::exception("Call SetSourceTexture before setting post-process effect");
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}
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float tu = 1.0f / float(texWidth);
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float tv = 1.0f / float(texHeight);
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// Sample from the 16 surrounding points. Since the center point will be in the
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// exact center of 16 texels, a 1.5f offset is needed to specify a texel center.
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auto ptr = reinterpret_cast<XMFLOAT4*>(constants.sampleOffsets);
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for (int y = 0; y < 4; ++y)
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{
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for (int x = 0; x < 4; ++x)
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{
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ptr->x = (float(x) - 1.5f) * tu;
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ptr->y = (float(y) - 1.5f) * tv;
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++ptr;
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}
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}
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}
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void BasicPostProcess::Impl::GaussianBlur5x5(float multiplier)
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{
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mUseConstants = true;
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if (!texWidth || !texHeight)
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{
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throw std::exception("Call SetSourceTexture before setting post-process effect");
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}
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float tu = 1.0f / float(texWidth);
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float tv = 1.0f / float(texHeight);
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float totalWeight = 0.0f;
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size_t index = 0;
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auto offsets = reinterpret_cast<XMFLOAT4*>(constants.sampleOffsets);
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auto weights = constants.sampleWeights;
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for (int x = -2; x <= 2; ++x)
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{
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for (int y = -2; y <= 2; ++y)
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{
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// Exclude pixels with a block distance greater than 2. This will
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// create a kernel which approximates a 5x5 kernel using only 13
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// sample points instead of 25; this is necessary since 2.0 shaders
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// only support 16 texture grabs.
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if (fabsf(float(x)) + fabsf(float(y)) > 2.0f)
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continue;
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// Get the unscaled Gaussian intensity for this offset
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offsets[index].x = float(x) * tu;
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offsets[index].y = float(y) * tv;
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offsets[index].z = 0.0f;
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offsets[index].w = 0.0f;
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float g = GaussianDistribution(float(x), float(y), 1.0f);
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weights[index] = XMVectorReplicate(g);
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totalWeight += XMVectorGetX(weights[index]);
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++index;
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}
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}
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// Divide the current weight by the total weight of all the samples; Gaussian
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// blur kernels add to 1.0f to ensure that the intensity of the image isn't
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// changed when the blur occurs. An optional multiplier variable is used to
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// add or remove image intensity during the blur.
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XMVECTOR vtw = XMVectorReplicate(totalWeight);
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XMVECTOR vm = XMVectorReplicate(multiplier);
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for (size_t i = 0; i < index; ++i)
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{
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weights[i] = XMVectorDivide(weights[i], vtw);
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weights[i] = XMVectorMultiply(weights[i], vm);
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}
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}
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void BasicPostProcess::Impl::Bloom(bool horizontal, float size, float brightness)
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{
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mUseConstants = true;
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if (!texWidth || !texHeight)
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{
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throw std::exception("Call SetSourceTexture before setting post-process effect");
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}
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float tu = 0.f;
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float tv = 0.f;
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if (horizontal)
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{
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tu = 1.f / float(texWidth);
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}
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else
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{
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tv = 1.f / float(texHeight);
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}
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auto weights = reinterpret_cast<XMFLOAT4*>(constants.sampleWeights);
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auto offsets = reinterpret_cast<XMFLOAT4*>(constants.sampleOffsets);
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// Fill the center texel
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float weight = brightness * GaussianDistribution(0, 0, size);
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weights[0] = XMFLOAT4(weight, weight, weight, 1.0f);
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offsets[0].x = offsets[0].y = offsets[0].z = offsets[0].w = 0.f;
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// Fill the first half
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for (int i = 1; i < 8; ++i)
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{
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// Get the Gaussian intensity for this offset
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weight = brightness * GaussianDistribution(float(i), 0, size);
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weights[i] = XMFLOAT4(weight, weight, weight, 1.0f);
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offsets[i] = XMFLOAT4(float(i) * tu, float(i) * tv, 0.f, 0.f);
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}
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// Mirror to the second half
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for (int i = 8; i < 15; i++)
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{
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weights[i] = weights[i - 7];
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offsets[i] = XMFLOAT4(-offsets[i - 7].x, -offsets[i - 7].y, 0.f, 0.f);
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}
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}
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// Public constructor.
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BasicPostProcess::BasicPostProcess(_In_ ID3D11Device* device)
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: pImpl(std::make_unique<Impl>(device))
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{
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}
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// Move constructor.
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BasicPostProcess::BasicPostProcess(BasicPostProcess&& moveFrom) noexcept
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: pImpl(std::move(moveFrom.pImpl))
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{
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}
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// Move assignment.
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BasicPostProcess& BasicPostProcess::operator= (BasicPostProcess&& moveFrom) noexcept
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{
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pImpl = std::move(moveFrom.pImpl);
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return *this;
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}
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// Public destructor.
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BasicPostProcess::~BasicPostProcess()
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{
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}
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// IPostProcess methods.
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void BasicPostProcess::Process(
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_In_ ID3D11DeviceContext* deviceContext,
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_In_opt_ std::function<void __cdecl()> setCustomState)
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{
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pImpl->Process(deviceContext, setCustomState);
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}
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// Shader control.
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void BasicPostProcess::SetEffect(Effect fx)
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{
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if (fx >= Effect_Max)
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throw std::out_of_range("Effect not defined");
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pImpl->fx = fx;
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switch (fx)
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{
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case Copy:
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case Monochrome:
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case Sepia:
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// These shaders don't use the constant buffer
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pImpl->SetConstants(false);
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break;
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default:
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pImpl->SetConstants(true);
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break;
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}
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}
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// Properties
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void BasicPostProcess::SetSourceTexture(_In_opt_ ID3D11ShaderResourceView* value)
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{
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pImpl->texture = value;
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if (value)
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{
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ComPtr<ID3D11Resource> res;
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value->GetResource(res.GetAddressOf());
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D3D11_RESOURCE_DIMENSION resType = D3D11_RESOURCE_DIMENSION_UNKNOWN;
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res->GetType(&resType);
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switch (resType)
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{
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case D3D11_RESOURCE_DIMENSION_TEXTURE1D:
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{
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ComPtr<ID3D11Texture1D> tex;
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ThrowIfFailed(res.As(&tex));
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D3D11_TEXTURE1D_DESC desc = {};
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tex->GetDesc(&desc);
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pImpl->texWidth = desc.Width;
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pImpl->texHeight = 1;
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break;
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}
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case D3D11_RESOURCE_DIMENSION_TEXTURE2D:
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{
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ComPtr<ID3D11Texture2D> tex;
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ThrowIfFailed(res.As(&tex));
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D3D11_TEXTURE2D_DESC desc = {};
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tex->GetDesc(&desc);
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pImpl->texWidth = desc.Width;
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pImpl->texHeight = desc.Height;
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break;
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}
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case D3D11_RESOURCE_DIMENSION_UNKNOWN:
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case D3D11_RESOURCE_DIMENSION_BUFFER:
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case D3D11_RESOURCE_DIMENSION_TEXTURE3D:
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default:
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throw std::exception("Unsupported texture type");
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}
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}
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else
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{
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pImpl->texWidth = pImpl->texHeight = 0;
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}
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}
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void BasicPostProcess::SetGaussianParameter(float multiplier)
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{
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pImpl->guassianMultiplier = multiplier;
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pImpl->SetDirtyFlag();
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}
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void BasicPostProcess::SetBloomExtractParameter(float threshold)
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{
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pImpl->bloomThreshold = threshold;
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pImpl->SetDirtyFlag();
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}
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void BasicPostProcess::SetBloomBlurParameters(bool horizontal, float size, float brightness)
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{
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pImpl->bloomSize = size;
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pImpl->bloomBrightness = brightness;
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pImpl->bloomHorizontal = horizontal;
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pImpl->SetDirtyFlag();
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}
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