DirectXの話 第146回

// PSOを作成

{

D3D12_INPUT_ELEMENT_DESC elementDescs[] = {

{ "POSITION", 0, DXGI_FORMAT_R32G32B32_FLOAT, 0, 0, D3D12_INPUT_CLASSIFICATION_PER_VERTEX_DATA, 0 },

{ "COLOR", 0, DXGI_FORMAT_R32G32B32A32_FLOAT, 1, 0, D3D12_INPUT_CLASSIFICATION_PER_VERTEX_DATA, 0 },

};

D3D12_RASTERIZER_DESC rasterDesc = {};

rasterDesc.FillMode = D3D12_FILL_MODE_SOLID;

rasterDesc.CullMode = D3D12_CULL_MODE_NONE;

rasterDesc.FrontCounterClockwise = false;

rasterDesc.DepthBias = D3D12_DEFAULT_DEPTH_BIAS;

rasterDesc.DepthBiasClamp = D3D12_DEFAULT_DEPTH_BIAS_CLAMP;

rasterDesc.SlopeScaledDepthBias = D3D12_DEFAULT_SLOPE_SCALED_DEPTH_BIAS;

rasterDesc.DepthClipEnable = true;

rasterDesc.MultisampleEnable = false;

rasterDesc.AntialiasedLineEnable = false;

rasterDesc.ForcedSampleCount = 0;

rasterDesc.ConservativeRaster = D3D12_CONSERVATIVE_RASTERIZATION_MODE_OFF;

D3D12_BLEND_DESC blendDesc = {};

blendDesc.AlphaToCoverageEnable = false;

blendDesc.IndependentBlendEnable = false;

blendDesc.RenderTarget[0].BlendEnable = false;

blendDesc.RenderTarget[0].LogicOpEnable = false;

blendDesc.RenderTarget[0].SrcBlend = D3D12_BLEND_ONE;

blendDesc.RenderTarget[0].DestBlend = D3D12_BLEND_ZERO;

blendDesc.RenderTarget[0].BlendOp = D3D12_BLEND_OP_ADD;

blendDesc.RenderTarget[0].SrcBlendAlpha = D3D12_BLEND_ONE;

blendDesc.RenderTarget[0].DestBlendAlpha = D3D12_BLEND_ZERO;

blendDesc.RenderTarget[0].BlendOpAlpha = D3D12_BLEND_OP_ADD;

blendDesc.RenderTarget[0].LogicOp = D3D12_LOGIC_OP_NOOP;

blendDesc.RenderTarget[0].RenderTargetWriteMask = D3D12_COLOR_WRITE_ENABLE_ALL;

D3D12_GRAPHICS_PIPELINE_STATE_DESC desc = {};

desc.InputLayout = { elementDescs, _countof(elementDescs) };

desc.pRootSignature = g_pRootSignature;

desc.VS = { reinterpret_cast<UINT8*>(g_binVS.GetBin()), g_binVS.GetBinSize() };

desc.PS = { reinterpret_cast<UINT8*>(g_binPS.GetBin()), g_binPS.GetBinSize() };

desc.RasterizerState = rasterDesc;

desc.BlendState = blendDesc;

desc.DepthStencilState.DepthEnable = FALSE;

desc.DepthStencilState.StencilEnable = FALSE;

desc.SampleMask = UINT_MAX;

desc.PrimitiveTopologyType = D3D12_PRIMITIVE_TOPOLOGY_TYPE_TRIANGLE;

desc.NumRenderTargets = 1;

desc.RTVFormats[0] = DXGI_FORMAT_R8G8B8A8_UNORM;

desc.SampleDesc.Count = 1;

hr = g_pDevice->CreateGraphicsPipelineState(&desc, IID_PPV_ARGS(&g_pPipelineState));

assert(SUCCEEDED(hr));

}

// 頂点座標を作成する

{

float positions[] = {

0.0f, 0.5f, 0.0f,

-0.5f, -0.5f, 0.0f,

0.5f, -0.5f, 0.0f,

};

D3D12_HEAP_PROPERTIES prop = {};

prop.Type = D3D12_HEAP_TYPE_UPLOAD;

prop.CPUPageProperty = D3D12_CPU_PAGE_PROPERTY_UNKNOWN;

prop.MemoryPoolPreference = D3D12_MEMORY_POOL_UNKNOWN;

prop.CreationNodeMask = 1;

prop.VisibleNodeMask = 1;

D3D12_RESOURCE_DESC desc = {};

desc.Dimension = D3D12_RESOURCE_DIMENSION_BUFFER;

desc.Alignment = 0;

desc.Width = sizeof(positions);

desc.Height = 1;

desc.DepthOrArraySize = 1;

desc.MipLevels = 1;

desc.Format = DXGI_FORMAT_UNKNOWN;

desc.SampleDesc.Count = 1;

desc.Layout = D3D12_TEXTURE_LAYOUT_ROW_MAJOR;

desc.Flags = D3D12_RESOURCE_FLAG_NONE;

hr = g_pDevice->CreateCommittedResource(

&prop, D3D12_HEAP_FLAG_NONE, &desc, D3D12_RESOURCE_STATE_GENERIC_READ, nullptr, IID_PPV_ARGS(&g_pVBPosition));

assert(SUCCEEDED(hr));

// バッファにコピー

UINT8* p;

hr = g_pVBPosition->Map(0, nullptr, reinterpret_cast<void**>(&p));

assert(SUCCEEDED(hr));

memcpy(p, positions, sizeof(positions));

g_pVBPosition->Unmap(0, nullptr);

// Viewの初期化

g_vbPositionView.BufferLocation = g_pVBPosition->GetGPUVirtualAddress();

g_vbPositionView.SizeInBytes = sizeof(positions);

g_vbPositionView.StrideInBytes = sizeof(float) * 3;

}