【DirectX11】2D纹理映射演示demo

#include"Texture2DDemo.h" #include<xnamath.h> struct VertexPos //结构体 { XMFLOAT3 pos; XMFLOAT2 tex0; }; TextureDemo::TextureDemo( ) : solidColorVS_( 0 ), solidColorPS_( 0 ), //构造函数 inputLayout_( 0 ), vertexBuffer_( 0 ), colorMap_( 0 ), colorMapSampler_( 0 ) { } TextureDemo::~TextureDemo( ) { } bool TextureDemo::LoadContent( ) { ID3DBlob* vsBuffer = 0; bool compileResult = CompileD3DShader( "TextureMap.fx", "VS_Main", "vs_4_0", &vsBuffer ); if( compileResult == false ) { DXTRACE_MSG( "编译顶点着色器失败!" ); return false; } HRESULT d3dResult; d3dResult = d3dDevice_->CreateVertexShader( vsBuffer->GetBufferPointer( ), vsBuffer->GetBufferSize( ), 0, &solidColorVS_ ); if( FAILED( d3dResult ) ) { DXTRACE_MSG( "创建顶点着色器失败!" ); if( vsBuffer ) vsBuffer->Release( ); return false; } D3D11_INPUT_ELEMENT_DESC solidColorLayout[] = { { "POSITION", 0, DXGI_FORMAT_R32G32B32_FLOAT, 0, 0, D3D11_INPUT_PER_VERTEX_DATA, 0 }, { "TEXCOORD", 0, DXGI_FORMAT_R32G32_FLOAT, 0, 12, D3D11_INPUT_PER_VERTEX_DATA, 0 } }; unsigned int totalLayoutElements = ARRAYSIZE( solidColorLayout ); d3dResult = d3dDevice_->CreateInputLayout( solidColorLayout, totalLayoutElements, vsBuffer->GetBufferPointer( ), vsBuffer->GetBufferSize( ), &inputLayout_ ); vsBuffer->Release( ); if( FAILED( d3dResult ) ) { DXTRACE_MSG( "创建输入布局失败!" ); return false; } ID3DBlob* psBuffer = 0; compileResult = CompileD3DShader( "TextureMap.fx", "PS_Main", "ps_4_0", &psBuffer ); if( compileResult == false ) { DXTRACE_MSG( "像素着色器编译失败!" ); return false; } d3dResult = d3dDevice_->CreatePixelShader( psBuffer->GetBufferPointer( ), psBuffer->GetBufferSize( ), 0, &solidColorPS_ ); psBuffer->Release( ); if( FAILED( d3dResult ) ) { DXTRACE_MSG( "创建像素着色器失败!" ); return false; } VertexPos vertices[] = { { XMFLOAT3( 1.0f, 1.0f, 1.0f ), XMFLOAT2( 1.0f, 1.0f ) }, { XMFLOAT3( 1.0f, -1.0f, 1.0f ), XMFLOAT2( 1.0f, 0.0f ) }, { XMFLOAT3( -1.0f, -1.0f, 1.0f ), XMFLOAT2( 0.0f, 0.0f ) }, { XMFLOAT3( -1.0f, -1.0f, 1.0f ), XMFLOAT2( 0.0f, 0.0f ) }, { XMFLOAT3( -1.0f, 1.0f, 1.0f ), XMFLOAT2( 0.0f, 1.0f ) }, { XMFLOAT3( 1.0f, 1.0f, 1.0f ), XMFLOAT2( 1.0f, 1.0f ) }, }; D3D11_BUFFER_DESC vertexDesc; ZeroMemory( &vertexDesc, sizeof( vertexDesc ) ); vertexDesc.Usage = D3D11_USAGE_DEFAULT; vertexDesc.BindFlags = D3D11_BIND_VERTEX_BUFFER; vertexDesc.ByteWidth = sizeof( VertexPos ) * 6; D3D11_SUBRESOURCE_DATA resourceData; ZeroMemory( &resourceData, sizeof( resourceData ) ); resourceData.pSysMem = vertices; d3dResult = d3dDevice_->CreateBuffer( &vertexDesc, &resourceData, &vertexBuffer_ ); if( FAILED( d3dResult ) ) { DXTRACE_MSG( "创建顶点缓存失败!" ); return false; } d3dResult = D3DX11CreateShaderResourceViewFromFile( d3dDevice_, "decal.dds", 0, 0, &colorMap_, 0 ); if( FAILED( d3dResult ) ) { DXTRACE_MSG( "读取纹理图像失败!" ); return false; } D3D11_SAMPLER_DESC colorMapDesc; ZeroMemory( &colorMapDesc, sizeof( colorMapDesc ) ); colorMapDesc.AddressU = D3D11_TEXTURE_ADDRESS_WRAP; colorMapDesc.AddressV = D3D11_TEXTURE_ADDRESS_WRAP; colorMapDesc.AddressW = D3D11_TEXTURE_ADDRESS_WRAP; colorMapDesc.ComparisonFunc = D3D11_COMPARISON_NEVER; colorMapDesc.Filter = D3D11_FILTER_MIN_MAG_MIP_LINEAR; colorMapDesc.MaxLOD = D3D11_FLOAT32_MAX; d3dResult = d3dDevice_->CreateSamplerState( &colorMapDesc, &colorMapSampler_ ); if( FAILED( d3dResult ) ) { DXTRACE_MSG( "创建颜色映射采样器声明失败!" ); return false; } return true; } void TextureDemo::UnloadContent( ) //UnloadContent函数的书写 { if( colorMapSampler_ ) colorMapSampler_->Release( ); if( colorMap_ ) colorMap_->Release( ); if( solidColorVS_ ) solidColorVS_->Release( ); if( solidColorPS_ ) solidColorPS_->Release( ); if( inputLayout_ ) inputLayout_->Release( ); if( vertexBuffer_ ) vertexBuffer_->Release( ); colorMapSampler_ = 0; colorMap_ = 0; solidColorVS_ = 0; solidColorPS_ = 0; inputLayout_ = 0; vertexBuffer_ = 0; } void TextureDemo::Update( float dt ) { // 无需进行更新 } void TextureDemo::Render( ) //Render函数的书写 { if( d3dContext_ == 0 ) return; float clearColor[4] = { 0.0f, 0.0f, 0.25f, 1.0f }; d3dContext_->ClearRenderTargetView( backBufferTarget_, clearColor ); unsigned int stride = sizeof( VertexPos ); unsigned int offset = 0; d3dContext_->IASetInputLayout( inputLayout_ ); d3dContext_->IASetVertexBuffers( 0, 1, &vertexBuffer_, &stride, &offset ); d3dContext_->IASetPrimitiveTopology( D3D11_PRIMITIVE_TOPOLOGY_TRIANGLELIST ); d3dContext_->VSSetShader( solidColorVS_, 0, 0 ); d3dContext_->PSSetShader( solidColorPS_, 0, 0 ); d3dContext_->PSSetShaderResources( 0, 1, &colorMap_ ); d3dContext_->PSSetSamplers( 0, 1, &colorMapSampler_ ); d3dContext_->Draw( 6, 0 ); swapChain_->Present( 0, 0 ); }