SimpleTexture12.cpp

//--------------------------------------------------------------------------------------
// SimpleTexture12.cpp
//
// Advanced Technology Group (ATG)
// Copyright (C) Microsoft Corporation. All rights reserved.
//--------------------------------------------------------------------------------------

#include "pch.h"
#include "SimpleTexture12.h"

#include "ATGColors.h"
#include "ReadData.h"

extern void ExitSample() noexcept;

using namespace DirectX;

using Microsoft::WRL::ComPtr;

namespace
{
    struct Vertex
    {
        XMFLOAT4 position;
        XMFLOAT2 texcoord;
    };

    std::vector<uint8_t> LoadBGRAImage(const wchar_t* filename, uint32_t& width, uint32_t& height)
    {
        ComPtr<IWICImagingFactory> wicFactory;
        DX::ThrowIfFailed(CoCreateInstance(CLSID_WICImagingFactory2, nullptr, CLSCTX_INPROC_SERVER, IID_PPV_ARGS(&wicFactory)));

        ComPtr<IWICBitmapDecoder> decoder;
        DX::ThrowIfFailed(wicFactory->CreateDecoderFromFilename(filename, nullptr, GENERIC_READ, WICDecodeMetadataCacheOnDemand, decoder.GetAddressOf()));

        ComPtr<IWICBitmapFrameDecode> frame;
        DX::ThrowIfFailed(decoder->GetFrame(0, frame.GetAddressOf()));

        DX::ThrowIfFailed(frame->GetSize(&width, &height));

        WICPixelFormatGUID pixelFormat;
        DX::ThrowIfFailed(frame->GetPixelFormat(&pixelFormat));

        uint32_t rowPitch = width * sizeof(uint32_t);
        uint32_t imageSize = rowPitch * height;

        std::vector<uint8_t> image;
        image.resize(size_t(imageSize));

        if (memcmp(&pixelFormat, &GUID_WICPixelFormat32bppBGRA, sizeof(GUID)) == 0)
        {
            DX::ThrowIfFailed(frame->CopyPixels(nullptr, rowPitch, imageSize, reinterpret_cast<BYTE*>(image.data())));
        }
        else
        {
            ComPtr<IWICFormatConverter> formatConverter;
            DX::ThrowIfFailed(wicFactory->CreateFormatConverter(formatConverter.GetAddressOf()));

            BOOL canConvert = FALSE;
            DX::ThrowIfFailed(formatConverter->CanConvert(pixelFormat, GUID_WICPixelFormat32bppBGRA, &canConvert));
            if (!canConvert)
            {
                throw std::exception("CanConvert");
            }

            DX::ThrowIfFailed(formatConverter->Initialize(frame.Get(), GUID_WICPixelFormat32bppBGRA,
                WICBitmapDitherTypeErrorDiffusion, nullptr, 0, WICBitmapPaletteTypeMedianCut));

            DX::ThrowIfFailed(formatConverter->CopyPixels(nullptr, rowPitch, imageSize, reinterpret_cast<BYTE*>(image.data())));
        }

        return image;
    }
}

Sample::Sample() :
    m_frame(0)
{
    // Use gamma-correct rendering.
    m_deviceResources = std::make_unique<DX::DeviceResources>(DXGI_FORMAT_B8G8R8A8_UNORM_SRGB, DXGI_FORMAT_D32_FLOAT, 2,
        DX::DeviceResources::c_Enable4K_UHD);
}

// Initialize the Direct3D resources required to run.
void Sample::Initialize(IUnknown* window)
{
    m_gamePad = std::make_unique<GamePad>();

    m_deviceResources->SetWindow(window);

    m_deviceResources->CreateDeviceResources();  
    CreateDeviceDependentResources();

    m_deviceResources->CreateWindowSizeDependentResources();
    CreateWindowSizeDependentResources();
}

#pragma region Frame Update
// Executes basic render loop.
void Sample::Tick()
{
    PIXBeginEvent(PIX_COLOR_DEFAULT, L"Frame %llu", m_frame);

    m_timer.Tick([&]()
    {
        Update(m_timer);
    });

    Render();

    PIXEndEvent();
    m_frame++;
}

// Updates the world.
void Sample::Update(DX::StepTimer const&)
{
    PIXBeginEvent(PIX_COLOR_DEFAULT, L"Update");

    auto pad = m_gamePad->GetState(0);
    if (pad.IsConnected())
    {
        if (pad.IsViewPressed())
        {
            ExitSample();
        }
    }

    PIXEndEvent();
}
#pragma endregion

#pragma region Frame Render
// Draws the scene.
void Sample::Render()
{
    // Don't try to render anything before the first Update.
    if (m_timer.GetFrameCount() == 0)
    {
        return;
    }

    // Prepare the command list to render a new frame.
    m_deviceResources->Prepare();
    Clear();

    auto commandList = m_deviceResources->GetCommandList();
    PIXBeginEvent(commandList, PIX_COLOR_DEFAULT, L"Render");

    commandList->SetGraphicsRootSignature(m_rootSignature.Get());
    commandList->SetPipelineState(m_pipelineState.Get());

    auto heap = m_srvHeap.Get();
    commandList->SetDescriptorHeaps(1, &heap);

    commandList->SetGraphicsRootDescriptorTable(0, m_srvHeap->GetGPUDescriptorHandleForHeapStart());

    // Set necessary state.
    commandList->IASetPrimitiveTopology(D3D_PRIMITIVE_TOPOLOGY_TRIANGLELIST);
    commandList->IASetVertexBuffers(0, 1, &m_vertexBufferView);
    commandList->IASetIndexBuffer(&m_indexBufferView);

    // Draw quad.
    commandList->DrawIndexedInstanced(6, 1, 0, 0, 0);

    PIXEndEvent(commandList);

    // Show the new frame.
    PIXBeginEvent(PIX_COLOR_DEFAULT, L"Present");
    m_deviceResources->Present();
    m_graphicsMemory->Commit(m_deviceResources->GetCommandQueue());
    PIXEndEvent();
}

// Helper method to clear the back buffers.
void Sample::Clear()
{
    auto commandList = m_deviceResources->GetCommandList();
    PIXBeginEvent(commandList, PIX_COLOR_DEFAULT, L"Clear");

    // Clear the views.
    auto rtvDescriptor = m_deviceResources->GetRenderTargetView();
    auto dsvDescriptor = m_deviceResources->GetDepthStencilView();

    commandList->OMSetRenderTargets(1, &rtvDescriptor, FALSE, &dsvDescriptor);

    // Use linear clear color for gamma-correct rendering.
    commandList->ClearRenderTargetView(rtvDescriptor, ATG::ColorsLinear::Background, 0, nullptr);

    commandList->ClearDepthStencilView(dsvDescriptor, D3D12_CLEAR_FLAG_DEPTH, 1.0f, 0, 0, nullptr);

    // Set the viewport and scissor rect.
    auto viewport = m_deviceResources->GetScreenViewport();
    auto scissorRect = m_deviceResources->GetScissorRect();
    commandList->RSSetViewports(1, &viewport);
    commandList->RSSetScissorRects(1, &scissorRect);

    PIXEndEvent(commandList);
}
#pragma endregion

#pragma region Message Handlers
// Message handlers
void Sample::OnSuspending()
{
    auto queue = m_deviceResources->GetCommandQueue();
    queue->SuspendX(0);
}

void Sample::OnResuming()
{
    auto queue = m_deviceResources->GetCommandQueue();
    queue->ResumeX();
    m_timer.ResetElapsedTime();
}
#pragma endregion

#pragma region Direct3D Resources
// These are the resources that depend on the device.
void Sample::CreateDeviceDependentResources()
{
    auto device = m_deviceResources->GetD3DDevice();

    m_graphicsMemory = std::make_unique<GraphicsMemory>(device);

    // Create descriptor heaps.
    {
        // Describe and create a shader resource view (SRV) heap for the texture.
        D3D12_DESCRIPTOR_HEAP_DESC srvHeapDesc = {};
        srvHeapDesc.NumDescriptors = 1;
        srvHeapDesc.Type = D3D12_DESCRIPTOR_HEAP_TYPE_CBV_SRV_UAV;
        srvHeapDesc.Flags = D3D12_DESCRIPTOR_HEAP_FLAG_SHADER_VISIBLE;
        DX::ThrowIfFailed(
            device->CreateDescriptorHeap(&srvHeapDesc, IID_GRAPHICS_PPV_ARGS(m_srvHeap.ReleaseAndGetAddressOf())));
    }

    // Create root signature.
    auto vertexShaderBlob = DX::ReadData(L"VertexShader.cso");

    // Xbox One best practice is to use HLSL-based root signatures to support shader precompilation.

    DX::ThrowIfFailed(
        device->CreateRootSignature(0, vertexShaderBlob.data(), vertexShaderBlob.size(),
            IID_GRAPHICS_PPV_ARGS(m_rootSignature.ReleaseAndGetAddressOf())));

    // Create the pipeline state, which includes loading shaders.
    auto pixelShaderBlob = DX::ReadData(L"PixelShader.cso");

    static const D3D12_INPUT_ELEMENT_DESC s_inputElementDesc[2] =
    {
        { "SV_Position", 0, DXGI_FORMAT_R32G32B32A32_FLOAT, 0, 0,  D3D12_INPUT_CLASSIFICATION_PER_VERTEX_DATA,  0 },
        { "TEXCOORD",    0, DXGI_FORMAT_R32G32_FLOAT,       0, 16, D3D12_INPUT_CLASSIFICATION_PER_VERTEX_DATA,  0 },
    };

    // Describe and create the graphics pipeline state object (PSO).
    D3D12_GRAPHICS_PIPELINE_STATE_DESC psoDesc = {};
    psoDesc.InputLayout = { s_inputElementDesc, _countof(s_inputElementDesc) };
    psoDesc.pRootSignature = m_rootSignature.Get();
    psoDesc.VS = { vertexShaderBlob.data(), vertexShaderBlob.size() };
    psoDesc.PS = { pixelShaderBlob.data(), pixelShaderBlob.size() };
    psoDesc.RasterizerState = CD3DX12_RASTERIZER_DESC(D3D12_DEFAULT);
    psoDesc.BlendState = CD3DX12_BLEND_DESC(D3D12_DEFAULT);
    psoDesc.DepthStencilState.DepthEnable = FALSE;
    psoDesc.DepthStencilState.StencilEnable = FALSE;
    psoDesc.DSVFormat = m_deviceResources->GetDepthBufferFormat();
    psoDesc.SampleMask = UINT_MAX;
    psoDesc.PrimitiveTopologyType = D3D12_PRIMITIVE_TOPOLOGY_TYPE_TRIANGLE;
    psoDesc.NumRenderTargets = 1;
    psoDesc.RTVFormats[0] = m_deviceResources->GetBackBufferFormat();
    psoDesc.SampleDesc.Count = 1;
    DX::ThrowIfFailed(
        device->CreateGraphicsPipelineState(&psoDesc,
            IID_GRAPHICS_PPV_ARGS(m_pipelineState.ReleaseAndGetAddressOf())));

    CD3DX12_HEAP_PROPERTIES heapUpload(D3D12_HEAP_TYPE_UPLOAD);

    // Create vertex buffer.
    {
        static const Vertex s_vertexData[4] =
        {
            { { -0.5f, -0.5f, 0.5f, 1.0f },{ 0.f, 1.f } },
            { { 0.5f, -0.5f, 0.5f, 1.0f },{ 1.f, 1.f } },
            { { 0.5f,  0.5f, 0.5f, 1.0f },{ 1.f, 0.f } },
            { { -0.5f,  0.5f, 0.5f, 1.0f },{ 0.f, 0.f } },
        };

        // Note: using upload heaps to transfer static data like vert buffers is not 
        // recommended. Every time the GPU needs it, the upload heap will be marshalled 
        // over. Please read up on Default Heap usage. An upload heap is used here for 
        // code simplicity and because there are very few verts to actually transfer.
        auto resDesc = CD3DX12_RESOURCE_DESC::Buffer(sizeof(s_vertexData));

        DX::ThrowIfFailed(
            device->CreateCommittedResource(&heapUpload,
                D3D12_HEAP_FLAG_NONE,
                &resDesc,
                D3D12_RESOURCE_STATE_GENERIC_READ,
                nullptr,
                IID_GRAPHICS_PPV_ARGS(m_vertexBuffer.ReleaseAndGetAddressOf())));

        // Copy the quad data to the vertex buffer.
        UINT8* pVertexDataBegin;
        CD3DX12_RANGE readRange(0, 0);		// We do not intend to read from this resource on the CPU.
        DX::ThrowIfFailed(
            m_vertexBuffer->Map(0, &readRange, reinterpret_cast<void**>(&pVertexDataBegin)));
        memcpy(pVertexDataBegin, s_vertexData, sizeof(s_vertexData));
        m_vertexBuffer->Unmap(0, nullptr);

        // Initialize the vertex buffer view.
        m_vertexBufferView.BufferLocation = m_vertexBuffer->GetGPUVirtualAddress();
        m_vertexBufferView.StrideInBytes = sizeof(Vertex);
        m_vertexBufferView.SizeInBytes = sizeof(s_vertexData);
    }

    // Create index buffer.
    {
        static const uint16_t s_indexData[6] =
        {
            3,1,0,
            2,1,3,
        };

        // See note above
        auto resDesc = CD3DX12_RESOURCE_DESC::Buffer(sizeof(s_indexData));

        DX::ThrowIfFailed(
            device->CreateCommittedResource(&heapUpload,
                D3D12_HEAP_FLAG_NONE,
                &resDesc,
                D3D12_RESOURCE_STATE_GENERIC_READ,
                nullptr,
                IID_GRAPHICS_PPV_ARGS(m_indexBuffer.ReleaseAndGetAddressOf())));

        // Copy the data to the index buffer.
        UINT8* pVertexDataBegin;
        CD3DX12_RANGE readRange(0, 0);		// We do not intend to read from this resource on the CPU.
        DX::ThrowIfFailed(
            m_indexBuffer->Map(0, &readRange, reinterpret_cast<void**>(&pVertexDataBegin)));
        memcpy(pVertexDataBegin, s_indexData, sizeof(s_indexData));
        m_indexBuffer->Unmap(0, nullptr);

        // Initialize the index buffer view.
        m_indexBufferView.BufferLocation = m_indexBuffer->GetGPUVirtualAddress();
        m_indexBufferView.Format = DXGI_FORMAT_R16_UINT;
        m_indexBufferView.SizeInBytes = sizeof(s_indexData);
    }

    // Create texture.
    auto commandList = m_deviceResources->GetCommandList();
    commandList->Reset(m_deviceResources->GetCommandAllocator(), nullptr);

    ComPtr<ID3D12Resource> textureUploadHeap;
    {
        D3D12_RESOURCE_DESC txtDesc = {};
        txtDesc.MipLevels = txtDesc.DepthOrArraySize = 1;
        txtDesc.Format = DXGI_FORMAT_B8G8R8A8_UNORM_SRGB; // sunset.jpg is in sRGB colorspace
        txtDesc.SampleDesc.Count = 1;
        txtDesc.Dimension = D3D12_RESOURCE_DIMENSION_TEXTURE2D;

        UINT width, height;
        auto image = LoadBGRAImage(L"sunset.jpg", width, height);
        txtDesc.Width = width;
        txtDesc.Height = height;

        CD3DX12_HEAP_PROPERTIES heapDefault(D3D12_HEAP_TYPE_DEFAULT);

        DX::ThrowIfFailed(
            device->CreateCommittedResource(
                &heapDefault,
                D3D12_HEAP_FLAG_NONE,
                &txtDesc,
                D3D12_RESOURCE_STATE_COPY_DEST,
                nullptr,
                IID_GRAPHICS_PPV_ARGS(m_texture.ReleaseAndGetAddressOf())));

        const UINT64 uploadBufferSize = GetRequiredIntermediateSize(m_texture.Get(), 0, 1);

        // Create the GPU upload buffer.
        auto resDesc = CD3DX12_RESOURCE_DESC::Buffer(uploadBufferSize);

        DX::ThrowIfFailed(
            device->CreateCommittedResource(
                &heapUpload,
                D3D12_HEAP_FLAG_NONE,
                &resDesc,
                D3D12_RESOURCE_STATE_GENERIC_READ,
                nullptr,
                IID_GRAPHICS_PPV_ARGS(textureUploadHeap.GetAddressOf())));

        D3D12_SUBRESOURCE_DATA textureData = {};
        textureData.pData = image.data();
        textureData.RowPitch = static_cast<LONG_PTR>(txtDesc.Width * sizeof(uint32_t));
        textureData.SlicePitch = image.size();

        UpdateSubresources(commandList, m_texture.Get(), textureUploadHeap.Get(), 0, 0, 1, &textureData);

        auto barrier = CD3DX12_RESOURCE_BARRIER::Transition(m_texture.Get(), D3D12_RESOURCE_STATE_COPY_DEST, D3D12_RESOURCE_STATE_PIXEL_SHADER_RESOURCE);
        commandList->ResourceBarrier(1, &barrier);

        // Describe and create a SRV for the texture.
        D3D12_SHADER_RESOURCE_VIEW_DESC srvDesc = {};
        srvDesc.Shader4ComponentMapping = D3D12_DEFAULT_SHADER_4_COMPONENT_MAPPING;
        srvDesc.Format = txtDesc.Format;
        srvDesc.ViewDimension = D3D12_SRV_DIMENSION_TEXTURE2D;
        srvDesc.Texture2D.MipLevels = 1;
        device->CreateShaderResourceView(m_texture.Get(), &srvDesc, m_srvHeap->GetCPUDescriptorHandleForHeapStart());
    }

    DX::ThrowIfFailed(commandList->Close());
    m_deviceResources->GetCommandQueue()->ExecuteCommandLists(1, CommandListCast(&commandList));

    // Wait until assets have been uploaded to the GPU.
    m_deviceResources->WaitForGpu();
}

// Allocate all memory resources that change on a window SizeChanged event.
void Sample::CreateWindowSizeDependentResources()
{
}
#pragma endregion