背景: - Directx 11 プログラミングを学ぶために過去 6 週間を費やしてきました。
それ自体が 2D スプライトでもある 2D 背景に 2D スプライトを描画しようとしています。問題は、これらの2行
d3dDevice_->CreateBlendState( &blendDesc, &alphaBlendState_ );
d3dContext_->OMSetBlendState( alphaBlendState_, blendFactor, 0xFFFFFFFF );
dds 画像のアルファ透明度を有効にします。スプライトをブレンドするオプションが欲しいのですが、現在、すべてのスプライトが青色の背景とブレンドされているため、青いロゴやアイコンなどが作成されています.
DirectX 11 でアルファ ブレンディングが特定の画像を無視するようにするにはどうすればよいですか?
バックグラウンド スプライトが最初に描画されるため、すべてのスプライトが青にならずに他のスプライトをレンダリングするときに、コードの後半で Blending をアクティブにすることはできません。
前もって感謝します ：）
編集: 私は過去 3 週間、この問題に取り組んできましたが、まだ解決策がありません。DeviceContext でブレンド状態が有効になるたびに、レンダリングの順序に関係なく、画面に描画されるすべてのテクスチャに適用されるようです。
ヘッダー ファイルのソース コードは次のとおりです。
class GameSpriteDemo : public Dx11DemoBase
{
public:
GameSpriteDemo( );
virtual ~GameSpriteDemo( );
bool LoadContent( );
void UnloadContent( );
void Update( float dt );
void Render( );
void DisableBlending();
ID3D11ShaderResourceView* getColorMap(int);
int UniqSpriteAmount();
// text rendering system
private:
bool DrawString( char* message, float startX, float startY );
private:
ID3D11VertexShader* solidColorVS_;
ID3D11VertexShader* solidColorVS_2;
ID3DX11Effect* effect_;
vector<ID3D11VertexShader*> solidColorVShaders;
ID3D11PixelShader* solidColorPS_;
ID3D11PixelShader* solidColorPS_2;
ID3D11InputLayout* inputLayout_;
ID3D11InputLayout* inputLayout2;
ID3D11Buffer* vertexBuffer_;
vector<ID3D11Buffer*> vertexBuffers;
ID3D11ShaderResourceView* colorMap_;
vector<ID3D11ShaderResourceView*> colorMaps;
ID3D11SamplerState* colorMapSampler_;
vector<ID3D11SamplerState*> colorSamplers;
ID3D11BlendState* alphaBlendState_;
ID3D11BlendState* alphaBlendStateOff;
vector<LPCTSTR> elements2D;
vector<GameSprite> sprites_;
ID3D11Buffer* mvpCB_;
XMMATRIX vpMatrix_;
};
#endif
cpp ファイルのソース コードは次のとおりです (基本クラス DxD11DemoClass は SwapChain と D3DContext のみを設定するため、必要ありません)。
bool GameSpriteDemo::LoadContent( )
{
// add sprite textures to the engine, giving them index 0, 1, 2... etc.
elements2D.push_back("placeholder3.dds");
elements2D.push_back("cav.dds");
elements2D.push_back("Stats.dds");
// create sprites
XMFLOAT2 sprite1Pos( 0.0f, 500.0f);
GameSprite sprite1(getDevice(), "placeholder3.dds", 0, sprite1Pos, 0.0f);
XMFLOAT2 sprite1Scale( 0.5f, 0.5f );
XMFLOAT2 mini(0.8f, 0.6f);
sprite1.SetScale(mini);
sprites_.push_back(sprite1);
XMFLOAT2 sprite2Pos( 200.0f, 100.0f );
GameSprite sprite2(getDevice(), "Stats.dds", 2, sprite2Pos, 2.0f);
// sprites_.push_back(sprite2);
XMFLOAT2 sprite3Pos( 290.0f, 300.0f );
GameSprite sprite3(getDevice(), "cav.dds", 1, sprite3Pos, 2.0f);
sprite3.SetScale(sprite1Scale);
sprites_.push_back(sprite3);
// create vertex buffers, colorMaps and colorSamplers
for (int i = 0; i <= elements2D.size(); i++) {
solidColorVShaders.push_back(solidColorVS_);
colorMaps.push_back(colorMap_);
colorSamplers.push_back(colorMapSampler_);
vertexBuffers.push_back(vertexBuffer_);
}
// continue
ID3DBlob* vsBuffer = 0;
bool compileResult = CompileD3DShader( "TextureMap.fx", "VS_Main", "vs_4_0", &vsBuffer );
if( compileResult == false )
{
DXTRACE_MSG( "Error compiling the vertex shader!" );
return false;
}
HRESULT d3dResult;
d3dResult = d3dDevice_->CreateVertexShader( vsBuffer->GetBufferPointer( ),
vsBuffer->GetBufferSize( ), 0, &solidColorVShaders[0] );
if( FAILED( d3dResult ) )
{
DXTRACE_MSG( "Error creating the vertex shader!" );
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( "Error creating the input layout!" );
return false;
}
ID3DBlob* psBuffer = 0;
compileResult = CompileD3DShader( "TextureMap.fx", "PS_Main", "ps_4_0", &psBuffer );
if( compileResult == false )
{
DXTRACE_MSG( "Error compiling pixel shader!" );
return false;
}
d3dResult = d3dDevice_->CreatePixelShader( psBuffer->GetBufferPointer( ),
psBuffer->GetBufferSize( ), 0, &solidColorPS_ );
psBuffer->Release( );
if( FAILED( d3dResult ) )
{
DXTRACE_MSG( "Error creating pixel shader!" );
return false;
}
// create ColorMap, ColorSampler and VertexBuffer for each unique sprite
D3D11_SAMPLER_DESC colorMapDesc;
D3D11_BUFFER_DESC vertexDesc;
D3D11_SUBRESOURCE_DATA resourceData;
for (int j = 0; j < elements2D.size(); j++) {
d3dResult = D3DX11CreateShaderResourceViewFromFile( d3dDevice_,
elements2D[j], 0, 0, &colorMaps[j], 0 );
if( FAILED( d3dResult ) )
{
DXTRACE_MSG( "Failed to load the texture image!" );
return false;
}
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, &colorSamplers[j] );
if( FAILED( d3dResult ) )
{
DXTRACE_MSG( "Failed to create color map sampler state!" );
return false;
}
float Width = sprites_[j].getWidth();
float Height = sprites_[j].getHeight();
VertexPos vertices[] =
{
{ XMFLOAT3( Width, Height, 1.0f ), XMFLOAT2( 1.0f, 0.0f ) },
{ XMFLOAT3( Width, -Height, 1.0f ), XMFLOAT2( 1.0f, 1.0f ) },
{ XMFLOAT3( -Width, -Height, 1.0f ), XMFLOAT2( 0.0f, 1.0f ) },
{ XMFLOAT3( -Width, -Height, 1.0f ), XMFLOAT2( 0.0f, 1.0f ) },
{ XMFLOAT3( -Width, Height, 1.0f ), XMFLOAT2( 0.0f, 0.0f ) },
{ XMFLOAT3( Width, Height, 1.0f ), XMFLOAT2( 1.0f, 0.0f ) },
};
ZeroMemory( &vertexDesc, sizeof( vertexDesc ) );
vertexDesc.Usage = D3D11_USAGE_DEFAULT;
vertexDesc.BindFlags = D3D11_BIND_VERTEX_BUFFER;
vertexDesc.ByteWidth = sizeof( VertexPos ) * 6;
ZeroMemory( &resourceData, sizeof( resourceData ) );
resourceData.pSysMem = vertices;
d3dResult = d3dDevice_->CreateBuffer( &vertexDesc, &resourceData, &vertexBuffers[j] );
if( FAILED( d3dResult ) )
{
DXTRACE_MSG( "Failed to create vertex buffer!" );
return false;
}
}
// end of foor loop
// create text fonts
d3dResult = D3DX11CreateShaderResourceViewFromFile( d3dDevice_,
"font.dds", 0, 0, &colorMap_, 0 );
if( FAILED( d3dResult ) )
{
DXTRACE_MSG( "Failed to load the texture image!" );
return false;
}
D3D11_SAMPLER_DESC colorMapDesc2;
ZeroMemory( &colorMapDesc2, sizeof( colorMapDesc2 ) );
colorMapDesc2.AddressU = D3D11_TEXTURE_ADDRESS_WRAP;
colorMapDesc2.AddressV = D3D11_TEXTURE_ADDRESS_WRAP;
colorMapDesc2.AddressW = D3D11_TEXTURE_ADDRESS_WRAP;
colorMapDesc2.ComparisonFunc = D3D11_COMPARISON_NEVER;
colorMapDesc2.Filter = D3D11_FILTER_MIN_MAG_MIP_LINEAR;
colorMapDesc2.MaxLOD = D3D11_FLOAT32_MAX;
d3dResult = d3dDevice_->CreateSamplerState( &colorMapDesc2, &colorMapSampler_ );
if( FAILED( d3dResult ) )
{
DXTRACE_MSG( "Failed to create color map sampler state!" );
return false;
}
D3D11_BUFFER_DESC vertexDesc2;
ZeroMemory( &vertexDesc2, sizeof( vertexDesc2 ) );
vertexDesc2.Usage = D3D11_USAGE_DYNAMIC;
vertexDesc2.CPUAccessFlags = D3D11_CPU_ACCESS_WRITE;
vertexDesc2.BindFlags = D3D11_BIND_VERTEX_BUFFER;
const int sizeOfSprite = sizeof( VertexPos ) * 6;
const int maxLetters = 24;
vertexDesc2.ByteWidth = sizeOfSprite * maxLetters;
d3dResult = d3dDevice_->CreateBuffer( &vertexDesc2, 0, &vertexBuffer_ );
if( FAILED( d3dResult ) )
{
DXTRACE_MSG( "Failed to create vertex buffer!" );
return false;
}
// end of font creation
D3D11_BUFFER_DESC constDesc;
ZeroMemory( &constDesc, sizeof( constDesc ) );
constDesc.BindFlags = D3D11_BIND_CONSTANT_BUFFER;
constDesc.ByteWidth = sizeof( XMMATRIX );
constDesc.Usage = D3D11_USAGE_DEFAULT;
d3dResult = d3dDevice_->CreateBuffer( &constDesc, 0, &mvpCB_ );
if( FAILED( d3dResult ) )
{
return false;
}
XMMATRIX view = XMMatrixIdentity( );
XMMATRIX projection = XMMatrixOrthographicOffCenterLH( 0.0f, 1366.0f, 0.0f, 768.0f, 0.1f, 100.0f );
vpMatrix_ = XMMatrixMultiply( view, projection );
D3D11_BLEND_DESC blendDesc;
ZeroMemory( &blendDesc, sizeof( blendDesc ) );
blendDesc.RenderTarget[0].BlendEnable = TRUE;
blendDesc.RenderTarget[0].BlendOp = D3D11_BLEND_OP_ADD;
blendDesc.RenderTarget[0].SrcBlend = D3D11_BLEND_SRC_ALPHA;
blendDesc.RenderTarget[0].DestBlend = D3D11_BLEND_ONE;
blendDesc.RenderTarget[0].BlendOpAlpha = D3D11_BLEND_OP_ADD;
blendDesc.RenderTarget[0].SrcBlendAlpha = D3D11_BLEND_ZERO;
blendDesc.RenderTarget[0].DestBlendAlpha = D3D11_BLEND_ZERO;
blendDesc.RenderTarget[0].RenderTargetWriteMask = D3D11_COLOR_WRITE_ENABLE_ALL;
float blendFactor[4] = { 0.0f, 0.0f, 0.0f, 0.0f };
d3dDevice_->CreateBlendState( &blendDesc, &alphaBlendState_ );
// create the disabled blend state
blendDesc.RenderTarget[0].BlendEnable = FALSE;
d3dDevice_->CreateBlendState( &blendDesc, &alphaBlendStateOff );
d3dContext_->OMSetBlendState( alphaBlendState_, blendFactor, 0xFFFFFFFF );
// holy shit here we go again
ID3DBlob* vsBuffer2 = 0;
compileResult = CompileD3DShader( "TextMap.fx", "VS_Main", "vs_4_0", &vsBuffer2 );
if( compileResult == false )
{
DXTRACE_MSG( "Error compiling the vertex shader!" );
return false;
}
d3dResult = d3dDevice_->CreateVertexShader( vsBuffer2->GetBufferPointer( ),
vsBuffer2->GetBufferSize( ), 0, &solidColorVS_2 );
ID3DBlob* psBuffer2 = 0;
compileResult = CompileD3DShader( "TextureMap.fx", "PS_Main", "ps_4_0", &psBuffer2 );
if( compileResult == false )
{
DXTRACE_MSG( "Error compiling pixel shader!" );
return false;
}
d3dResult = d3dDevice_->CreatePixelShader( psBuffer2->GetBufferPointer( ),
psBuffer2->GetBufferSize( ), 0, &solidColorPS_2 );
psBuffer2->Release( );
return true;
}
void GameSpriteDemo::UnloadContent( )
{
if( colorMapSampler_ ) colorMapSampler_->Release( );
if( colorMap_ ) colorMap_->Release( );
if( solidColorVShaders[0] ) solidColorVShaders[0]->Release( );
if( solidColorPS_ ) solidColorPS_->Release( );
if( inputLayout_ ) inputLayout_->Release( );
if( vertexBuffer_ ) vertexBuffer_->Release( );
if( mvpCB_ ) mvpCB_->Release( );
if( alphaBlendState_ ) alphaBlendState_->Release( );
if( alphaBlendStateOff ) alphaBlendStateOff->Release( );
colorMapSampler_ = 0;
colorMap_ = 0;
solidColorVShaders[0] = 0;
solidColorPS_ = 0;
inputLayout_ = 0;
vertexBuffer_ = 0;
mvpCB_ = 0;
alphaBlendState_ = 0;
alphaBlendStateOff = 0;
}
void GameSpriteDemo::Update( float dt )
{
// Nothing to update
}
bool GameSpriteDemo::DrawString( char* message, float startX, float startY )
{
// Size in bytes for a single sprite.
const int sizeOfSprite = sizeof( VertexPos ) * 6;
// Demo's dynamic buffer setup for max of 24 letters.
const int maxLetters = 24;
int length = strlen( message );
// Clamp for strings too long.
if( length > maxLetters )
length = maxLetters;
// Char's width on screen.
float charWidth = 32.0f / (1366.0f*1.0f);
// Char's height on screen.
float charHeight = 32.0f / (768.0f*1.0f);
// Char's texel width.
float texelWidth = 32.0f / 896.0f;
// verts per-triangle (3) * total triangles (2) = 6.
const int verticesPerLetter = 6;
D3D11_MAPPED_SUBRESOURCE mapResource;
HRESULT d3dResult = d3dContext_->Map( vertexBuffer_, 0, D3D11_MAP_WRITE_DISCARD, 0, &mapResource );
if( FAILED( d3dResult ) )
{
DXTRACE_MSG( "Failed to map resource!" );
return false;
}
// Point to our vertex buffer's internal data.
VertexPos *spritePtr = ( VertexPos* )mapResource.pData;
const int indexA = static_cast<char>( 'A' );
const int indexZ = static_cast<char>( 'Z' );
const int index_a = static_cast<char>( 'a' );
for( int i = 0; i < length; ++i )
{
float thisStartX = startX + ( charWidth * static_cast<float>( i ) );
float thisEndX = thisStartX + charWidth;
float thisEndY = startY + charHeight;
spritePtr[0].pos = XMFLOAT3( thisEndX, thisEndY, 1.0f );
spritePtr[1].pos = XMFLOAT3( thisEndX, startY, 1.0f );
spritePtr[2].pos = XMFLOAT3( thisStartX, startY, 1.0f );
spritePtr[3].pos = XMFLOAT3( thisStartX, startY, 1.0f );
spritePtr[4].pos = XMFLOAT3( thisStartX, thisEndY, 1.0f );
spritePtr[5].pos = XMFLOAT3( thisEndX, thisEndY, 1.0f );
int texLookup = 0;
int letter = static_cast<char>( message[i] );
if (letter == index_a) {
texLookup = (indexZ - indexA) + 2;
}
else if( letter < indexA || letter > indexZ )
{
// Grab one index past Z, which is a blank space in the texture.
texLookup = ( indexZ - indexA ) + 1;
}
else
{
// A = 0, B = 1, Z = 25, etc.
texLookup = ( letter - indexA );
}
float tuStart = 0.0f + ( texelWidth * static_cast<float>( texLookup ) );
float tuEnd = tuStart + texelWidth;
spritePtr[0].tex0 = XMFLOAT2( tuEnd, 0.0f );
spritePtr[1].tex0 = XMFLOAT2( tuEnd, 1.0f );
spritePtr[2].tex0 = XMFLOAT2( tuStart, 1.0f );
spritePtr[3].tex0 = XMFLOAT2( tuStart, 1.0f );
spritePtr[4].tex0 = XMFLOAT2( tuStart, 0.0f );
spritePtr[5].tex0 = XMFLOAT2( tuEnd, 0.0f );
spritePtr += 6;
}
d3dContext_->Unmap( vertexBuffer_, 0 );
d3dContext_->Draw( 6 * length, 0 );
return true;
}
void GameSpriteDemo::Render( )
{
if( d3dContext_ == 0 )
return;
float clearColor[4] = { 0.0f, 0.0f, 0.0f, 1.0f };
d3dContext_->ClearRenderTargetView( backBufferTarget_, clearColor );
unsigned int stride = sizeof( VertexPos );
unsigned int offset = 0;
d3dContext_->IASetInputLayout( inputLayout_ );
d3dContext_->IASetPrimitiveTopology( D3D11_PRIMITIVE_TOPOLOGY_TRIANGLELIST );
d3dContext_->VSSetShader( solidColorVShaders[0], 0, 0 );
d3dContext_->PSSetShader( solidColorPS_, 0, 0 );
XMMATRIX world;
XMMATRIX mvp;
int index;
for (int k = 0; k < sprites_.size(); k++) {
index = sprites_[k].getIndex();
d3dContext_->IASetVertexBuffers( 0, 1, &vertexBuffers[index], &stride, &offset );
d3dContext_->PSSetShaderResources( 0, 1, &colorMaps[index] );
d3dContext_->PSSetSamplers( 0, 1, &colorSamplers[index] );
world = sprites_[k].GetWorldMatrix();
mvp = XMMatrixMultiply( world, vpMatrix_ );
mvp = XMMatrixTranspose( mvp );
d3dContext_->UpdateSubresource( mvpCB_, 0, 0, &mvp, 0, 0 );
d3dContext_->VSSetConstantBuffers( 0, 1, &mvpCB_ );
d3dContext_->Draw( 6, 0 );
}
// render text
DisableBlending();
d3dContext_->IASetVertexBuffers( 0, 1, &vertexBuffer_, &stride, &offset );
d3dContext_->PSSetShaderResources( 0, 1, &colorMap_ );
d3dContext_->PSSetSamplers( 0, 1, &colorMapSampler_ );
d3dContext_->VSSetShader( solidColorVS_2, 0, 0 );
d3dContext_->PSSetShader( solidColorPS_2, 0, 0 );
DrawString( "PROTOTYPE TEXT", -0.2f, 0.0f );
swapChain_->Present( 0, 0 );
}
ID3D11ShaderResourceView* GameSpriteDemo::getColorMap(int index) {
return colorMaps[index];
}
// this functions disables the alpha blending
void GameSpriteDemo::DisableBlending() {
float blendFactor[4] = { 0.0f, 0.0f, 0.0f, 0.0f };
d3dContext_->OMSetBlendState( alphaBlendStateOff, blendFactor, 0xFFFFFFFF );
}
ブレンディング有効で描画した結果の画面 http://i49.tinypic.com/33kao9v.jpg
ここに、私が使用している 2 つの FX ファイルの HLSL コードがあります (1 つ目はスプライト用、2 つ目はテキスト用)。
TextureMap.fx
cbuffer cbChangesPerFrame : register( b0 )
{
matrix mvp_;
};
Texture2D colorMap_ : register( t0 );
SamplerState colorSampler_ : register( s0 );
struct VS_Input
{
float4 pos : POSITION;
float2 tex0 : TEXCOORD0;
};
struct PS_Input
{
float4 pos : SV_POSITION;
float2 tex0 : TEXCOORD0;
};
PS_Input VS_Main( VS_Input vertex )
{
PS_Input vsOut = ( PS_Input )0;
vsOut.pos = mul( vertex.pos, mvp_ );
vsOut.tex0 = vertex.tex0;
return vsOut;
}
float4 PS_Main( PS_Input frag ) : SV_TARGET
{
return colorMap_.Sample( colorSampler_, frag.tex0 );
}
TextMap.fx
Texture2D colorMap_ : register( t0 );
SamplerState colorSampler_ : register( s0 );
struct VS_Input
{
float4 pos : POSITION;
float2 tex0 : TEXCOORD0;
};
struct PS_Input
{
float4 pos : SV_POSITION;
float2 tex0 : TEXCOORD0;
};
PS_Input VS_Main( VS_Input vertex )
{
PS_Input vsOut = ( PS_Input )0;
vsOut.pos = vertex.pos;
vsOut.tex0 = vertex.tex0;
return vsOut;
}
float4 PS_Main( PS_Input frag ) : SV_TARGET
{
return colorMap_.Sample( colorSampler_, frag.tex0 );
}
ピクセル シェーダーを使用して特定の 2D 画像のアルファ ブレンディングを実行することを考えていましたが、最初の試みはまったく機能しませんでした。
誰かが何とか解決策を見つけてくれることを願っています:)
そして助けてくれてありがとう。