349 lines
11 KiB
C++
349 lines
11 KiB
C++
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///////////////////////////////////////////////////////////////////////////////
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// Copyright (C) Microsoft Corporation, 2000.
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//
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// rtarget.hpp
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//
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// Direct3D Reference Device - Render Target Methods
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//
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///////////////////////////////////////////////////////////////////////////////
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#include "pch.cpp"
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#pragma hdrstop
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//-----------------------------------------------------------------------------
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//
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// Constructor/Destructor
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//
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//-----------------------------------------------------------------------------
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RDRenderTarget::RDRenderTarget( void )
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{
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memset( this, 0, sizeof(*this) );
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}
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//-----------------------------------------------------------------------------
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RDRenderTarget::~RDRenderTarget( void )
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{
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if( m_bPreDX7DDI )
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{
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if( m_pColor ) delete m_pColor;
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if( m_pDepth ) delete m_pDepth;
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}
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return;
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}
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//-----------------------------------------------------------------------------
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//
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// ReadPixelColor - Reads color buffer bits and expands out into an RDColor
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// value. Buffer types without alpha return a 1.0 value for alpha. Low
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// bits of <8 bit colors are returned as zero.
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//
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//-----------------------------------------------------------------------------
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void
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RDRenderTarget::ReadPixelColor(
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INT32 iX, INT32 iY, UINT Sample,
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RDColor& Color)
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{
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if ( NULL == m_pColor->GetBits() ) return;
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char* pSurfaceBits = PixelAddress( iX, iY, 0, Sample, m_pColor );
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Color.ConvertFrom( m_pColor->GetSurfaceFormat(), pSurfaceBits );
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}
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//-----------------------------------------------------------------------------
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//
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// WritePixelColor - Takes an RDColor value, formats it for the color buffer
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// format, and writes the value into buffer.
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//
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// Dithering is applied here, when enabled, for <8 bits/channel surfaces.
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//
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//-----------------------------------------------------------------------------
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void
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RDRenderTarget::WritePixelColor(
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INT32 iX, INT32 iY, UINT Sample,
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const RDColor& Color, BOOL bDither)
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{
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if ( NULL == m_pColor->GetBits() ) return;
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// default to round to nearest
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FLOAT fRoundOffset = .5F;
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if ( bDither )
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{
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static FLOAT fDitherTable[16] =
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{
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.03125f, .53125f, .15625f, .65625f,
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.78125f, .28125f, .90625f, .40625f,
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.21875f, .71875f, .09375f, .59375f,
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.96875f, .46875f, .84375f, .34375f
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};
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// form 4 bit offset into dither table (2 LSB's of x and y) and get offset
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unsigned uDitherOffset = ( ( iX << 2) & 0xc ) | (iY & 0x3 );
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fRoundOffset = fDitherTable[uDitherOffset];
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}
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char* pSurfaceBits = PixelAddress( iX, iY, 0, Sample, m_pColor );
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Color.ConvertTo( m_pColor->GetSurfaceFormat(), fRoundOffset, pSurfaceBits );
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}
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void
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RDRenderTarget::WritePixelColor(
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INT32 iX, INT32 iY,
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const RDColor& Color, BOOL bDither)
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{
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for (int i=0; i<m_pColor->GetSamples(); i++)
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{
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WritePixelColor( iX, iY, i, Color, bDither );
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}
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}
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//-----------------------------------------------------------------------------
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//
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// Read/WritePixelDepth - Read/write depth buffer
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//
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//-----------------------------------------------------------------------------
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void
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RDRenderTarget::WritePixelDepth(
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INT32 iX, INT32 iY, UINT Sample,
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const RDDepth& Depth )
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{
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// don't write if no Z buffer
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if ( NULL == m_pDepth ) { return; }
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char* pSurfaceBits = PixelAddress( iX, iY, 0, Sample, m_pDepth );
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switch (m_pDepth->GetSurfaceFormat())
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{
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case RD_SF_Z16S0:
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*((UINT16*)pSurfaceBits) = UINT16(Depth);
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break;
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case RD_SF_Z24S8:
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case RD_SF_Z24X8:
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case RD_SF_Z24X4S4:
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{
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// need to do read-modify-write to not step on stencil
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UINT32 uBufferBits = *((UINT32*)pSurfaceBits);
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uBufferBits &= ~(0xffffff00);
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uBufferBits |= (UINT32(Depth) << 8);
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*((UINT32*)pSurfaceBits) = uBufferBits;
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}
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break;
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case RD_SF_S8Z24:
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case RD_SF_X8Z24:
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case RD_SF_X4S4Z24:
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{
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// need to do read-modify-write to not step on stencil
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UINT32 uBufferBits = *((UINT32*)pSurfaceBits);
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uBufferBits &= ~(0x00ffffff);
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uBufferBits |= (UINT32(Depth) & 0x00ffffff);
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*((UINT32*)pSurfaceBits) = uBufferBits;
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}
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break;
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case RD_SF_Z15S1:
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{
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// need to do read-modify-write to not step on stencil
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UINT16 uBufferBits = *((UINT16*)pSurfaceBits);
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uBufferBits &= ~(0xfffe);
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uBufferBits |= (UINT16(Depth) << 1);
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*((UINT16*)pSurfaceBits) = uBufferBits;
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}
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break;
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case RD_SF_S1Z15:
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{
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// need to do read-modify-write to not step on stencil
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UINT16 uBufferBits = *((UINT16*)pSurfaceBits);
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uBufferBits &= ~(0x7fff);
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uBufferBits |= (UINT16(Depth) & 0x7fff);
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*((UINT16*)pSurfaceBits) = uBufferBits;
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}
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break;
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case RD_SF_Z32S0:
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*((UINT32*)pSurfaceBits) = UINT32(Depth);
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break;
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}
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}
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void
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RDRenderTarget::WritePixelDepth(
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INT32 iX, INT32 iY,
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const RDDepth& Depth )
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{
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if ( NULL == m_pDepth ) { return; }
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for (int i=0; i<m_pDepth->GetSamples(); i++)
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{
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WritePixelDepth( iX, iY, i, Depth );
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}
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}
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//-----------------------------------------------------------------------------
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void
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RDRenderTarget::ReadPixelDepth(
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INT32 iX, INT32 iY, UINT Sample,
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RDDepth& Depth )
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{
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// don't read if no Z buffer
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if ( NULL == m_pDepth ) { return; }
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char* pSurfaceBits = PixelAddress( iX, iY, 0, Sample, m_pDepth );
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switch (m_pDepth->GetSurfaceFormat())
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{
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case RD_SF_Z16S0:
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Depth = *((UINT16*)pSurfaceBits);
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break;
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case RD_SF_Z24S8:
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case RD_SF_Z24X8:
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case RD_SF_Z24X4S4:
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// take upper 24 bits aligned to LSB
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Depth = ( *((UINT32*)pSurfaceBits) ) >> 8;
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break;
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case RD_SF_S8Z24:
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case RD_SF_X8Z24:
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case RD_SF_X4S4Z24:
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// take lower 24 bits
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Depth = ( *((UINT32*)pSurfaceBits) ) & 0x00ffffff;
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break;
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case RD_SF_Z15S1:
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// take upper 15 bits aligned to LSB
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Depth = (UINT16)(( *((UINT16*)pSurfaceBits) ) >> 1);
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break;
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case RD_SF_S1Z15:
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// take lower 15 bits
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Depth = (UINT16)(( *((UINT16*)pSurfaceBits) ) & 0x7fff);
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break;
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case RD_SF_Z32S0:
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Depth = *((UINT32*)pSurfaceBits);
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break;
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}
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}
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//-----------------------------------------------------------------------------
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//
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// Read/WritePixelStencil - Read/Write of stencil bits within depth buffer
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// surface; write is done with read-modify-write so depth bits are not disturbed;
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// stencil mask is applied outside
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//
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//-----------------------------------------------------------------------------
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void
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RDRenderTarget::WritePixelStencil(
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INT32 iX, INT32 iY, UINT Sample,
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UINT8 uStencil)
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{
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// don't write if no Z/Stencil buffer or no stencil in Z buffer
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if ( (NULL == m_pDepth ) ||
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((RD_SF_Z24S8 != m_pDepth->GetSurfaceFormat()) &&
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(RD_SF_S8Z24 != m_pDepth->GetSurfaceFormat()) &&
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(RD_SF_S1Z15 != m_pDepth->GetSurfaceFormat()) &&
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(RD_SF_Z15S1 != m_pDepth->GetSurfaceFormat()) &&
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(RD_SF_Z24X4S4 != m_pDepth->GetSurfaceFormat()) &&
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(RD_SF_X4S4Z24 != m_pDepth->GetSurfaceFormat())) ) { return; }
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char* pSurfaceBits = PixelAddress( iX, iY, 0, Sample, m_pDepth );
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// need to do read-modify-write to not step on Z
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switch(m_pDepth->GetSurfaceFormat())
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{
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case RD_SF_Z24S8:
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{
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UINT32 uBufferBits = *((UINT32*)pSurfaceBits);
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uBufferBits &= ~(0x000000ff);
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uBufferBits |= uStencil;
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*((UINT32*)pSurfaceBits) = uBufferBits;
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}
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break;
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case RD_SF_S8Z24:
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{
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UINT32 uBufferBits = *((UINT32*)pSurfaceBits);
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uBufferBits &= ~(0xff000000);
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uBufferBits |= (uStencil << 24);
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*((UINT32*)pSurfaceBits) = uBufferBits;
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}
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break;
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case RD_SF_Z24X4S4:
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{
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UINT32 uBufferBits = *((UINT32*)pSurfaceBits);
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uBufferBits &= ~(0x000000ff);
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uBufferBits |= (uStencil & 0xf);
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*((UINT32*)pSurfaceBits) = uBufferBits;
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}
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break;
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case RD_SF_X4S4Z24:
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{
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UINT32 uBufferBits = *((UINT32*)pSurfaceBits);
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uBufferBits &= ~(0xff000000);
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uBufferBits |= ((uStencil & 0xf) << 24);
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*((UINT32*)pSurfaceBits) = uBufferBits;
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}
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break;
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case RD_SF_Z15S1:
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{
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UINT16 uBufferBits = *((UINT16*)pSurfaceBits);
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uBufferBits &= ~(0x0001);
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uBufferBits |= uStencil & 0x1;
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*((UINT16*)pSurfaceBits) = uBufferBits;
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}
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break;
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case RD_SF_S1Z15:
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{
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UINT16 uBufferBits = *((UINT16*)pSurfaceBits);
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uBufferBits &= ~(0x8000);
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uBufferBits |= uStencil << 15;
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*((UINT16*)pSurfaceBits) = uBufferBits;
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}
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break;
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}
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}
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void
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RDRenderTarget::WritePixelStencil(
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INT32 iX, INT32 iY,
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UINT8 uStencil)
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{
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if ( NULL == m_pDepth ) { return; }
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for (int i=0; i<m_pDepth->GetSamples(); i++)
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{
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WritePixelStencil( iX, iY, i, uStencil );
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}
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}
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//-----------------------------------------------------------------------------
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void
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RDRenderTarget::ReadPixelStencil(
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INT32 iX, INT32 iY, UINT Sample,
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UINT8& uStencil)
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{
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// don't read if no Z/Stencil buffer or no stencil in Z buffer
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if ( ( NULL == m_pDepth ) ||
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((RD_SF_Z24S8 != m_pDepth->GetSurfaceFormat()) &&
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(RD_SF_S8Z24 != m_pDepth->GetSurfaceFormat()) &&
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(RD_SF_S1Z15 != m_pDepth->GetSurfaceFormat()) &&
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(RD_SF_Z15S1 != m_pDepth->GetSurfaceFormat()) &&
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(RD_SF_Z24X4S4 != m_pDepth->GetSurfaceFormat()) &&
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(RD_SF_X4S4Z24 != m_pDepth->GetSurfaceFormat()) ) ) { return; }
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char* pSurfaceBits = PixelAddress( iX, iY, 0, Sample, m_pDepth );
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switch(m_pDepth->GetSurfaceFormat())
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{
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case RD_SF_Z24S8:
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uStencil = (UINT8)( ( *((UINT32*)pSurfaceBits) ) & 0xff );
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break;
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case RD_SF_S8Z24:
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uStencil = (UINT8)( ( *((UINT32*)pSurfaceBits) ) >> 24 );
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break;
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case RD_SF_Z15S1:
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uStencil = (UINT8)( ( *((UINT16*)pSurfaceBits) ) & 0x1 );
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break;
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case RD_SF_S1Z15:
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uStencil = (UINT8)( ( *((UINT16*)pSurfaceBits) ) >> 15 );
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break;
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case RD_SF_Z24X4S4:
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uStencil = (UINT8)( ( *((UINT32*)pSurfaceBits) ) & 0xf );
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break;
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case RD_SF_X4S4Z24:
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uStencil = (UINT8)( ( ( *((UINT32*)pSurfaceBits) ) >> 24 ) & 0xf);
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break;
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}
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}
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///////////////////////////////////////////////////////////////////////////////
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// end
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