431 lines
12 KiB
C++
431 lines
12 KiB
C++
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//----------------------------------------------------------------------------
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//
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// drawprim.cpp
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//
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// Implements DrawOnePrimitive, DrawOneIndexedPrimitive and
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// DrawPrimitives.
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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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HRESULT
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RefDev::DrawOnePrimitive( GArrayT<RDVertex>& VtxArray,
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DWORD dwStartVertex,
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D3DPRIMITIVETYPE PrimType,
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UINT cVertices )
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{
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INT i;
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RDVertex* pV0;
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RDVertex* pV1;
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RDVertex* pV2;
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HRESULT hr;
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DWORD dwCurrVtx = dwStartVertex;
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switch( PrimType )
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{
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case D3DPT_POINTLIST:
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for (i = (INT)cVertices; i > 0; i--)
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{
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DrawPoint(&VtxArray[dwCurrVtx++]);
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}
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break;
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case D3DPT_LINELIST:
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for (i = (INT)cVertices / 2; i > 0; i--)
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{
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pV0 = &VtxArray[dwCurrVtx++];
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pV1 = &VtxArray[dwCurrVtx++];
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DrawLine(pV0, pV1);
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}
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break;
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case D3DPT_LINESTRIP:
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{
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pV1 = &VtxArray[dwCurrVtx];
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// Disable last-pixel setting for shared verties and store prestate.
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StoreLastPixelState(TRUE);
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// Initial pV0.
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for (i = (INT)cVertices - 1; i > 1; i--)
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{
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pV0 = pV1;
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dwCurrVtx++;
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pV1 = &VtxArray[dwCurrVtx];
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DrawLine(pV0, pV1);
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}
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// Restore last-pixel setting.
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StoreLastPixelState(FALSE);
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// Draw last line with last-pixel setting from state.
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if (i == 1)
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{
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pV0 = &VtxArray[++dwCurrVtx];
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DrawLine(pV1, pV0);
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}
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}
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break;
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case D3DPT_TRIANGLELIST:
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for (i = (INT)cVertices; i > 0; i -= 3)
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{
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pV0 = &VtxArray[dwCurrVtx++];
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pV1 = &VtxArray[dwCurrVtx++];
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pV2 = &VtxArray[dwCurrVtx++];
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DrawTriangle(pV0, pV1, pV2);
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}
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break;
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case D3DPT_TRIANGLESTRIP:
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{
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// Get initial vertex values.
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pV1 = &VtxArray[dwCurrVtx++];
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pV2 = &VtxArray[dwCurrVtx++];
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for (i = (INT)cVertices - 2; i > 1; i -= 2)
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{
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pV0 = pV1;
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pV1 = pV2;
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pV2 = &VtxArray[dwCurrVtx++];
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DrawTriangle(pV0, pV1, pV2);
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pV0 = pV1;
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pV1 = pV2;
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pV2 = &VtxArray[dwCurrVtx++];
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DrawTriangle(pV0, pV2, pV1);
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}
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if (i > 0)
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{
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pV0 = pV1;
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pV1 = pV2;
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pV2 = &VtxArray[dwCurrVtx];
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DrawTriangle(pV0, pV1, pV2);
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}
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}
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break;
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case D3DPT_TRIANGLEFAN:
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{
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pV2 = &VtxArray[dwCurrVtx++];
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// Preload initial pV0.
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pV1 = &VtxArray[dwCurrVtx++];
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for (i = (INT)cVertices - 2; i > 0; i--)
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{
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pV0 = pV1;
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pV1 = &VtxArray[dwCurrVtx++];
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DrawTriangle(pV0, pV1, pV2);
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}
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}
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break;
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default:
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DPFERR( "Refrast Error: Unknown or unsupported primitive type "
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"requested of DrawOnePrimitive" );
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return DDERR_INVALIDPARAMS;
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}
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return D3D_OK;
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}
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HRESULT
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RefDev::DrawOneIndexedPrimitive( GArrayT<RDVertex>& VtxArray,
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int StartVertexIndex,
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LPWORD puIndices,
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DWORD StartIndex,
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UINT cIndices,
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D3DPRIMITIVETYPE PrimType )
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{
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INT i;
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RDVertex* pV0;
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RDVertex* pV1;
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RDVertex* pV2;
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HRESULT hr;
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LPWORD pIndices = puIndices + StartIndex;
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switch( PrimType )
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{
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case D3DPT_POINTLIST:
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for (i = (INT)cIndices; i > 0; i--)
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{
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pV0 = &VtxArray[StartVertexIndex + (*pIndices++)];
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DrawPoint(pV0);
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}
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break;
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case D3DPT_LINELIST:
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for (i = (INT)cIndices / 2; i > 0; i--)
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{
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pV0 = &VtxArray[StartVertexIndex + (*pIndices++)];
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pV1 = &VtxArray[StartVertexIndex + (*pIndices++)];
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DrawLine(pV0, pV1);
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}
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break;
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case D3DPT_LINESTRIP:
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{
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// Disable last-pixel setting for shared verties and store prestate.
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StoreLastPixelState(TRUE);
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// Initial pV1.
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pV1 = &VtxArray[StartVertexIndex + (*pIndices++)];
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for (i = (INT)cIndices - 1; i > 1; i--)
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{
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pV0 = pV1;
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pV1 = &VtxArray[StartVertexIndex + (*pIndices++)];
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DrawLine(pV0, pV1);
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}
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// Restore last-pixel setting.
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StoreLastPixelState(FALSE);
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// Draw last line with last-pixel setting from state.
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if (i == 1)
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{
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pV0 = &VtxArray[StartVertexIndex + (*pIndices)];
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DrawLine(pV1, pV0);
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}
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}
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break;
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case D3DPT_TRIANGLELIST:
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for (i = (INT)cIndices; i > 0; i -= 3)
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{
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pV0 = &VtxArray[StartVertexIndex + (*pIndices++)];
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pV1 = &VtxArray[StartVertexIndex + (*pIndices++)];
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pV2 = &VtxArray[StartVertexIndex + (*pIndices++)];
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DrawTriangle(pV0, pV1, pV2);
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}
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break;
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case D3DPT_TRIANGLESTRIP:
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{
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// Get initial vertex values.
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pV1 = &VtxArray[StartVertexIndex + (*pIndices++)];
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pV2 = &VtxArray[StartVertexIndex + (*pIndices++)];
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for (i = (INT)cIndices - 2; i > 1; i -= 2)
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{
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pV0 = pV1;
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pV1 = pV2;
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pV2 = &VtxArray[StartVertexIndex + (*pIndices++)];
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DrawTriangle(pV0, pV1, pV2);
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pV0 = pV1;
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pV1 = pV2;
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pV2 = &VtxArray[StartVertexIndex + (*pIndices++)];
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DrawTriangle(pV0, pV2, pV1);
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}
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if (i > 0)
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{
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pV0 = pV1;
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pV1 = pV2;
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pV2 = &VtxArray[StartVertexIndex + (*pIndices++)];
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DrawTriangle(pV0, pV1, pV2);
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}
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}
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break;
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case D3DPT_TRIANGLEFAN:
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{
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pV2 = &VtxArray[StartVertexIndex + (*pIndices++)];
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// Preload initial pV0.
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pV1 = &VtxArray[StartVertexIndex + (*pIndices++)];
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for (i = (INT)cIndices - 2; i > 0; i--)
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{
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pV0 = pV1;
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pV1 = &VtxArray[StartVertexIndex + (*pIndices++)];
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DrawTriangle(pV0, pV1, pV2);
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}
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}
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break;
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default:
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DPFERR( "Refrast Error: Unknown or unsupported primitive type "
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"requested of DrawOneIndexedPrimitive" );
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return DDERR_INVALIDPARAMS;
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}
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return D3D_OK;
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}
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// DWORD index version
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HRESULT
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RefDev::DrawOneIndexedPrimitive( GArrayT<RDVertex>& VtxArray,
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int StartVertexIndex,
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LPDWORD puIndices,
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DWORD StartIndex,
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UINT cIndices,
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D3DPRIMITIVETYPE PrimType )
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{
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INT i;
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RDVertex* pV0;
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RDVertex* pV1;
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RDVertex* pV2;
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HRESULT hr;
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LPDWORD pIndices = puIndices + StartIndex;
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switch( PrimType )
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{
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case D3DPT_POINTLIST:
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for (i = (INT)cIndices; i > 0; i--)
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{
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pV0 = &VtxArray[StartVertexIndex + (*pIndices++)];
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DrawPoint(pV0);
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}
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break;
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case D3DPT_LINELIST:
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for (i = (INT)cIndices / 2; i > 0; i--)
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{
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pV0 = &VtxArray[StartVertexIndex + (*pIndices++)];
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pV1 = &VtxArray[StartVertexIndex + (*pIndices++)];
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DrawLine(pV0, pV1);
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}
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break;
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case D3DPT_LINESTRIP:
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{
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// Disable last-pixel setting for shared verties and store prestate.
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StoreLastPixelState(TRUE);
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// Initial pV1.
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pV1 = &VtxArray[StartVertexIndex + (*pIndices++)];
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for (i = (INT)cIndices - 1; i > 1; i--)
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{
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pV0 = pV1;
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pV1 = &VtxArray[StartVertexIndex + (*pIndices++)];
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DrawLine(pV0, pV1);
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}
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// Restore last-pixel setting.
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StoreLastPixelState(FALSE);
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// Draw last line with last-pixel setting from state.
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if (i == 1)
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{
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pV0 = &VtxArray[StartVertexIndex + (*pIndices)];
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DrawLine(pV1, pV0);
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}
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}
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break;
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case D3DPT_TRIANGLELIST:
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for (i = (INT)cIndices; i > 0; i -= 3)
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{
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pV0 = &VtxArray[StartVertexIndex + (*pIndices++)];
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pV1 = &VtxArray[StartVertexIndex + (*pIndices++)];
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pV2 = &VtxArray[StartVertexIndex + (*pIndices++)];
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DrawTriangle(pV0, pV1, pV2);
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}
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break;
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case D3DPT_TRIANGLESTRIP:
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{
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// Get initial vertex values.
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pV1 = &VtxArray[StartVertexIndex + (*pIndices++)];
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pV2 = &VtxArray[StartVertexIndex + (*pIndices++)];
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for (i = (INT)cIndices - 2; i > 1; i -= 2)
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{
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pV0 = pV1;
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pV1 = pV2;
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pV2 = &VtxArray[StartVertexIndex + (*pIndices++)];
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DrawTriangle(pV0, pV1, pV2);
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pV0 = pV1;
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pV1 = pV2;
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pV2 = &VtxArray[StartVertexIndex + (*pIndices++)];
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DrawTriangle(pV0, pV2, pV1);
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}
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if (i > 0)
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{
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pV0 = pV1;
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pV1 = pV2;
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pV2 = &VtxArray[StartVertexIndex + (*pIndices++)];
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DrawTriangle(pV0, pV1, pV2);
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}
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}
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break;
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case D3DPT_TRIANGLEFAN:
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{
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pV2 = &VtxArray[StartVertexIndex + (*pIndices++)];
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// Preload initial pV0.
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pV1 = &VtxArray[StartVertexIndex + (*pIndices++)];
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for (i = (INT)cIndices - 2; i > 0; i--)
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{
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pV0 = pV1;
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pV1 = &VtxArray[StartVertexIndex + (*pIndices++)];
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DrawTriangle(pV0, pV1, pV2);
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}
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}
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break;
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default:
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DPFERR( "Refrast Error: Unknown or unsupported primitive type "
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"requested of DrawOneIndexedPrimitive" );
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return DDERR_INVALIDPARAMS;
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}
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return D3D_OK;
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}
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//----------------------------------------------------------------------------
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//
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// DoDrawOneEdgeFlagTriangleFan
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//
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// Draw one list of triangle fans. It's called by both RastDrawOnePrimitive and
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// RastDrawPrimitives.
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//
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//----------------------------------------------------------------------------
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HRESULT
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RefDev::DrawOneEdgeFlagTriangleFan( GArrayT<RDVertex>& VtxArray,
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UINT cVertices,
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UINT32 dwEdgeFlags )
|
||
|
|
{
|
||
|
|
INT i;
|
||
|
|
RDVertex* pV0;
|
||
|
|
RDVertex* pV1;
|
||
|
|
RDVertex* pV2;
|
||
|
|
HRESULT hr;
|
||
|
|
DWORD dwCurrVtx = 0;
|
||
|
|
|
||
|
|
pV2 = &VtxArray[dwCurrVtx++];
|
||
|
|
pV0 = &VtxArray[dwCurrVtx++];
|
||
|
|
pV1 = &VtxArray[dwCurrVtx++];
|
||
|
|
WORD wFlags = 0;
|
||
|
|
if(dwEdgeFlags & 0x2)
|
||
|
|
wFlags |= D3DTRIFLAG_EDGEENABLE1;
|
||
|
|
if(dwEdgeFlags & 0x1)
|
||
|
|
wFlags |= D3DTRIFLAG_EDGEENABLE3;
|
||
|
|
if(cVertices == 3) {
|
||
|
|
if(dwEdgeFlags & 0x4)
|
||
|
|
wFlags |= D3DTRIFLAG_EDGEENABLE2;
|
||
|
|
DrawTriangle(pV0, pV1, pV2, wFlags);
|
||
|
|
return D3D_OK;
|
||
|
|
}
|
||
|
|
DrawTriangle(pV0, pV1, pV2, wFlags);
|
||
|
|
UINT32 dwMask = 0x4;
|
||
|
|
for (i = (INT)cVertices - 4; i > 0; i--)
|
||
|
|
{
|
||
|
|
pV0 = pV1;
|
||
|
|
pV1 = &VtxArray[dwCurrVtx++];
|
||
|
|
if(dwEdgeFlags & dwMask)
|
||
|
|
{
|
||
|
|
DrawTriangle(pV0, pV1, pV2, D3DTRIFLAG_EDGEENABLE1);
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
DrawTriangle(pV0, pV1, pV2, 0);
|
||
|
|
}
|
||
|
|
dwMask <<= 1;
|
||
|
|
}
|
||
|
|
pV0 = pV1;
|
||
|
|
pV1 = &VtxArray[dwCurrVtx++];
|
||
|
|
wFlags = 0;
|
||
|
|
if(dwEdgeFlags & dwMask)
|
||
|
|
wFlags |= D3DTRIFLAG_EDGEENABLE1;
|
||
|
|
dwMask <<= 1;
|
||
|
|
if(dwEdgeFlags & dwMask)
|
||
|
|
wFlags |= D3DTRIFLAG_EDGEENABLE2;
|
||
|
|
DrawTriangle(pV0, pV1, pV2, wFlags);
|
||
|
|
|
||
|
|
return D3D_OK;
|
||
|
|
}
|
||
|
|
|