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296 lines
7.8 KiB
296 lines
7.8 KiB
//----------------------------------------------------------------------------
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//
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// point.cpp
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//
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// Point processing.
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//
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// Copyright (C) Microsoft Corporation, 1997.
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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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DBG_DECLARE_FILE();
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void
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PrimProcessor::FillPointSpan(LPD3DTLVERTEX pV0, PD3DI_RASTSPAN pSpan)
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{
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FLOAT fZ;
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FLOAT fZScale;
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pSpan->uPix = 1;
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pSpan->uX = (UINT16)m_StpCtx.iX;
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pSpan->uY = (UINT16)m_StpCtx.iY;
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pSpan->pSurface = m_StpCtx.pCtx->pSurfaceBits +
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m_StpCtx.iX * m_StpCtx.pCtx->iSurfaceStep +
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m_StpCtx.iY * m_StpCtx.pCtx->iSurfaceStride;
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if (m_StpCtx.uFlags & PRIMSF_Z_USED)
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{
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pSpan->pZ = m_StpCtx.pCtx->pZBits +
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m_StpCtx.iX * m_StpCtx.pCtx->iZStep +
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m_StpCtx.iY * m_StpCtx.pCtx->iZStride;
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if (m_StpCtx.pCtx->iZBitCount == 16)
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{
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fZScale = Z16_SCALE;
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}
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else
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{
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fZScale = Z32_SCALE;
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}
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// fZ may be used later so set if from the vertex Z.
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fZ = pV0->dvSZ;
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pSpan->uZ = FTOI(fZ * fZScale);
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}
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if (m_StpCtx.uFlags & PRIMSF_TEX_USED)
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{
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FLOAT fW;
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FLOAT fUoW, fVoW;
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// Mipmapping doesn't have any meaning.
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RSASSERT((m_StpCtx.uFlags & PRIMSF_LOD_USED) == 0);
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if (m_StpCtx.uFlags & PRIMSF_PERSP_USED)
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{
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if (FLOAT_EQZ(pV0->dvRHW))
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{
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fW = g_fZero;
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}
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else
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{
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fW = g_fOne / pV0->dvRHW;
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}
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pSpan->iW = FTOI(fW * W_SCALE);
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fUoW = pV0->dvTU * pV0->dvRHW;
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fVoW = pV0->dvTV * pV0->dvRHW;
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pSpan->iOoW = FTOI(pV0->dvRHW * OOW_SCALE);
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}
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else
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{
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fUoW = pV0->dvTU;
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fVoW = pV0->dvTV;
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}
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pSpan->iLOD = 0;
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pSpan->iDLOD = 0;
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pSpan->iUoW1 = FTOI(fUoW * TEX_SCALE);
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pSpan->iVoW1 = FTOI(fVoW * TEX_SCALE);
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}
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if (m_StpCtx.uFlags & PRIMSF_TEX2_USED)
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{
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if (m_StpCtx.uFlags & PRIMSF_PERSP_USED)
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{
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pSpan->iUoW2 =
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FTOI(((PRAST_GENERIC_VERTEX)pV0)->dvTU2 *
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pV0->dvRHW * TEX_SCALE);
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pSpan->iVoW2 =
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FTOI(((PRAST_GENERIC_VERTEX)pV0)->dvTV2 *
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pV0->dvRHW * TEX_SCALE);
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}
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else
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{
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pSpan->iUoW2 =
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FTOI(((PRAST_GENERIC_VERTEX)pV0)->dvTU2 * TEX_SCALE);
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pSpan->iVoW2 =
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FTOI(((PRAST_GENERIC_VERTEX)pV0)->dvTV2 * TEX_SCALE);
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}
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}
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if (m_StpCtx.uFlags & PRIMSF_DIFF_USED)
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{
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pSpan->uB = (UINT)RGBA_GETBLUE(m_StpCtx.pFlatVtx->dcColor) <<
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COLOR_SHIFT;
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pSpan->uG = (UINT)RGBA_GETGREEN(m_StpCtx.pFlatVtx->dcColor) <<
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COLOR_SHIFT;
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pSpan->uR = (UINT)RGBA_GETRED(m_StpCtx.pFlatVtx->dcColor) <<
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COLOR_SHIFT;
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pSpan->uA = (UINT)RGBA_GETALPHA(m_StpCtx.pFlatVtx->dcColor) <<
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COLOR_SHIFT;
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}
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else if (m_StpCtx.uFlags & PRIMSF_DIDX_USED)
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{
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pSpan->iIdx = (INT32)CI_MASKALPHA(m_StpCtx.pFlatVtx->dcColor) <<
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INDEX_COLOR_FIXED_SHIFT;
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pSpan->iIdxA = (INT32)CI_GETALPHA(m_StpCtx.pFlatVtx->dcColor) <<
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INDEX_COLOR_SHIFT;
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}
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if (m_StpCtx.uFlags & PRIMSF_SPEC_USED)
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{
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pSpan->uBS = (UINT)RGBA_GETBLUE(m_StpCtx.pFlatVtx->dcSpecular) <<
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COLOR_SHIFT;
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pSpan->uGS = (UINT)RGBA_GETGREEN(m_StpCtx.pFlatVtx->dcSpecular) <<
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COLOR_SHIFT;
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pSpan->uRS = (UINT)RGBA_GETRED(m_StpCtx.pFlatVtx->dcSpecular) <<
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COLOR_SHIFT;
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}
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if (m_StpCtx.uFlags & PRIMSF_LOCAL_FOG_USED)
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{
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if (m_StpCtx.uFlags & PRIMSF_GLOBAL_FOG_USED)
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{
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// Make sure that fZ has been set.
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RSASSERT(m_StpCtx.uFlags & PRIMSF_Z_USED);
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pSpan->uFog = (UINT16)ComputeTableFog(m_StpCtx.pCtx->pdwRenderState, fZ);
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}
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else
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{
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pSpan->uFog = (INT16)
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FTOI((FLOAT)RGBA_GETALPHA(pV0->dcSpecular) *
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FOG_255_SCALE);
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}
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}
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}
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// Determine whether any of the given values are less than zero or greater
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// than one. Negative zero counts as less than zero so this check will
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// produce some false positives but that's OK.
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#define NEEDS_NORMALIZE1(fV0) \
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(ASUINT32(fV0) > INT32_FLOAT_ONE)
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//----------------------------------------------------------------------------
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//
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// PrimProcessor::NormalizePointRHW
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//
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// D3DTLVERTEX.dvRHW can be anything, but our internal structures only
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// allow for it being in the range [0, 1]. This function clamps
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// the RHW to the proper range.
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//
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//----------------------------------------------------------------------------
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void
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PrimProcessor::NormalizePointRHW(LPD3DTLVERTEX pV0)
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{
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// Save original value.
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m_dvV0RHW = pV0->dvRHW;
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// Produce a warning when a value is out of the desired range.
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#if DBG
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if (FLOAT_LTZ(pV0->dvRHW))
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{
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RSDPF(("Point RHW out of range %f,%f",
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pV0->dvRHW));
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}
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#endif
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if (pV0->dvRHW < NORMALIZED_RHW_MIN)
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{
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pV0->dvRHW = NORMALIZED_RHW_MIN;
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}
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else if (pV0->dvRHW > NORMALIZED_RHW_MAX)
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{
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pV0->dvRHW = NORMALIZED_RHW_MAX;
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}
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}
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//----------------------------------------------------------------------------
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//
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// PrimProcessor::Point
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//
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// Provides a point for processing.
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//
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//----------------------------------------------------------------------------
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HRESULT
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PrimProcessor::Point(LPD3DTLVERTEX pV0,
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LPD3DTLVERTEX pFlatVtx)
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{
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HRESULT hr;
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hr = D3D_OK;
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#if DBG
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hr = ValidateVertex(pV0);
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if (hr != D3D_OK)
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{
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return hr;
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}
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#endif
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// Clear per-point flags.
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m_StpCtx.uFlags &= ~(PRIMF_ALL | PTF_ALL);
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RSDPFM((RSM_FLAGS, "m_uPpFlags: 0x%08X, m_StpCtx.uFlags: 0x%08X",
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m_uPpFlags, m_StpCtx.uFlags));
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// Round coordinates to integer.
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m_StpCtx.iX = IFLOORF(pV0->dvSX + g_fHalf);
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m_StpCtx.iY = IFLOORF(pV0->dvSY + g_fHalf);
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RSDPFM((RSM_POINTS, "Point\n"));
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RSDPFM((RSM_POINTS, " V0 (%f,%f,%f) (%d,%d)\n",
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pV0->dvSX, pV0->dvSY, pV0->dvSZ,
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m_StpCtx.iX, m_StpCtx.iY));
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// Clip test.
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if (m_StpCtx.iX < m_StpCtx.pCtx->Clip.left ||
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m_StpCtx.iX >= m_StpCtx.pCtx->Clip.right ||
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m_StpCtx.iY < m_StpCtx.pCtx->Clip.top ||
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m_StpCtx.iY >= m_StpCtx.pCtx->Clip.bottom)
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{
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return D3D_OK;
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}
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//
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// Fill out a one-pixel span for the point.
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// Since the prim deltas are irrelevant for the span,
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// the span is appended to whatever primitive happens
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// to be available in the buffer.
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//
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PD3DI_RASTSPAN pSpan;
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UINT cSpans = 1;
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hr = AppendPrim();
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if (hr != D3D_OK)
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{
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return hr;
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}
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hr = AllocSpans(&cSpans, &pSpan);
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if (hr != D3D_OK)
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{
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return hr;
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}
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m_StpCtx.pPrim->uSpans++;
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BOOL bNorm;
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// USED checks cannot be combined since TEX_USED is a multibit check.
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if ((m_StpCtx.uFlags & PRIMSF_TEX_USED) &&
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(m_StpCtx.uFlags & PRIMSF_PERSP_USED) &&
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(m_uPpFlags & PPF_NORMALIZE_RHW) &&
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NEEDS_NORMALIZE1(pV0->dvRHW))
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{
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NormalizePointRHW(pV0);
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bNorm = TRUE;
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}
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else
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{
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bNorm = FALSE;
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}
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// Remember flat color controlling vertex for setup.
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m_StpCtx.pFlatVtx = pFlatVtx;
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FillPointSpan(pV0, pSpan);
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if (bNorm)
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{
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pV0->dvRHW = m_dvV0RHW;
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}
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return D3D_OK;
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}
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