//--------------------------------------------------------------------------------------
// Name: Downsample2x2Texture()
// Desc: Scale down pSrcTexture by 1/2 x 1/2 and place the result in pDstTexture
//--------------------------------------------------------------------------------------
VOID PostProcess::Downsample2x2Texture( LPDIRECT3DTEXTURE9 pSrcTexture,
LPDIRECT3DTEXTURE9 pDstTexture,
DWORD dwEdramOffset )
{
// Make sure that the required shaders and objects exist
assert( m_pDownScale2x2PS );
assert( pSrcTexture && pDstTexture );
XGTEXTURE_DESC SrcDesc;
XGGetTextureDesc( pSrcTexture, 0, &SrcDesc );
// Create and set a render target
D3DSURFACE_PARAMETERS surfaceParams = { 0 };
surfaceParams.Base = dwEdramOffset;
PushRenderTarget( 0L, CreateRenderTarget( pDstTexture, &surfaceParams ) );
XMVECTOR avSampleOffsets[MAX_SAMPLES];
GetSampleOffsets_DownScale2x2( SrcDesc.Width, SrcDesc.Height, avSampleOffsets );
g_pd3dDevice->SetPixelShaderConstantF( PSCONST_avSampleOffsets, ( FLOAT* )avSampleOffsets, MAX_SAMPLES );
// Create an exact 1/2 x 1/2 copy of the source texture
g_pd3dDevice->SetPixelShader( m_pDownScale2x2PS );
g_pd3dDevice->SetTexture( 0, pSrcTexture );
g_pd3dDevice->SetSamplerState( 0, D3DSAMP_MINFILTER, D3DTEXF_POINT );
g_pd3dDevice->SetSamplerState( 0, D3DSAMP_ADDRESSU, D3DTADDRESS_CLAMP );
g_pd3dDevice->SetSamplerState( 0, D3DSAMP_ADDRESSV, D3DTADDRESS_CLAMP );
// TODO: This should use border addressing with a black border!
//m_pStarSourceTexture->Format.ClampX = GPUCLAMP_CLAMP_TO_BORDER;
//m_pStarSourceTexture->Format.ClampY = GPUCLAMP_CLAMP_TO_BORDER;
//m_pStarSourceTexture->Format.BorderColor = GPUBORDERCOLOR_ABGR_BLACK;
//g_pd3dDevice->SetSamplerState( 0, D3DSAMP_ADDRESSU, D3DTADDRESS_BORDER );
//g_pd3dDevice->SetSamplerState( 0, D3DSAMP_ADDRESSV, D3DTADDRESS_BORDER );
// Draw a fullscreen quad to sample the RT
DrawFullScreenQuad();
g_pd3dDevice->Resolve( D3DRESOLVE_RENDERTARGET0, NULL, pDstTexture, NULL,
0, 0, NULL, 1.0f, 0L, NULL );
// Cleanup and return
PopRenderTarget( 0L )->Release();
g_pd3dDevice->SetPixelShader( NULL );
}
void HDRLight::_brightSource_ToBloomSource()
{
D3DXVECTOR2 avSampleOffsets[MAX_SAMPLES];
// Get the new render target surface
PDIRECT3DSURFACE9 pSurfBloomSource;
g_pTexBloomSource->GetSurfaceLevel( 0, &pSurfBloomSource );
// Get the rectangle describing the sampled portion of the source texture.
// Decrease the rectangle to adjust for the single pixel black border.
RECT rectSrc;
GetTextureRect( g_pTexBrightPass, &rectSrc );
InflateRect( &rectSrc, -1, -1 );
// Get the destination rectangle.
// Decrease the rectangle to adjust for the single pixel black border.
RECT rectDest;
GetTextureRect( g_pTexBloomSource, &rectDest );
InflateRect( &rectDest, -1, -1 );
// Get the correct texture coordinates to apply to the rendered quad in order
// to sample from the source rectangle and render into the destination rectangle
CoordRect coords;
GetTextureCoords( g_pTexBrightPass, &rectSrc, g_pTexBloomSource, &rectDest, &coords );
// Get the sample offsets used within the pixel shader
D3DSURFACE_DESC desc;
g_pTexBrightPass->GetLevelDesc( 0, &desc );
GetSampleOffsets_DownScale2x2( desc.Width, desc.Height, avSampleOffsets );
g_HDREffect->SetValue( "g_avSampleOffsets", avSampleOffsets, sizeof( avSampleOffsets ) );
// Create an exact 1/2 x 1/2 copy of the source texture
g_HDREffect->SetTechnique( "DownScale2x2" );
g_pd3dDevice->SetRenderTarget( 0, pSurfBloomSource );
g_pd3dDevice->SetTexture( 0, g_pTexBrightPass );
g_pd3dDevice->SetScissorRect( &rectDest );
g_pd3dDevice->SetRenderState( D3DRS_SCISSORTESTENABLE, TRUE );
g_pd3dDevice->SetSamplerState( 0, D3DSAMP_MINFILTER, D3DTEXF_POINT );
g_pd3dDevice->SetSamplerState( 0, D3DSAMP_ADDRESSU, D3DTADDRESS_CLAMP );
g_pd3dDevice->SetSamplerState( 0, D3DSAMP_ADDRESSV, D3DTADDRESS_CLAMP );
UINT uiPassCount, uiPass;
g_HDREffect->Begin( &uiPassCount, 0 );
for( uiPass = 0; uiPass < uiPassCount; uiPass++ )
{
g_HDREffect->BeginPass( uiPass );
// Draw a fullscreen quad
DrawFullScreenQuad(g_pd3dDevice, coords.fLeftU,coords.fTopV,coords.fRightU,coords.fBottomV );
g_HDREffect->EndPass();
}
g_HDREffect->End();
g_pd3dDevice->SetRenderState( D3DRS_SCISSORTESTENABLE, FALSE );
SAFE_RELEASE( pSurfBloomSource );
}
