91 lines
2.9 KiB
C
91 lines
2.9 KiB
C
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/*==========================================================================;
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*
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* Copyright (C) 1997 Microsoft Corporation. All Rights Reserved.
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*
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* File: clipfunc.h
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* Content: Clipper functions
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*
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***************************************************************************/
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#ifndef _CLIPFUNC_H_
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#define _CLIPFUNC_H_
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#include "clipper.h"
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#include "ddibase.h"
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DWORD D3DFE_GenClipFlags(D3DFE_PROCESSVERTICES *pv);
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//---------------------------------------------------------------------
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// This function is called by the clipper to draw unclipped part of a primitive
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//
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inline HRESULT DRAW_PRIM(D3DFE_PROCESSVERTICES *pv,
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D3DPRIMITIVETYPE primitiveType,
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LPVOID startVertex, DWORD vertexCount, DWORD numPrim)
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{
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pv->lpvOut = startVertex;
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pv->primType = primitiveType;
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pv->dwNumVertices = vertexCount;
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pv->dwNumPrimitives = numPrim;
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try
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{
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pv->pDDI->DrawPrim(pv);
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}
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catch( HRESULT hr )
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{
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return hr;
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}
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return D3D_OK;
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}
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//---------------------------------------------------------------------
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// This function is called by the clipper to draw clipped part of a primitive
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//
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inline HRESULT DRAW_CLIPPED_PRIM(D3DFE_PROCESSVERTICES *pv,
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D3DPRIMITIVETYPE primitiveType,
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LPVOID startVertex, DWORD vertexCount, DWORD numPrim)
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{
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pv->lpvOut = startVertex;
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pv->primType = primitiveType;
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pv->dwNumVertices = vertexCount;
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pv->dwNumPrimitives = numPrim;
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try
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{
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pv->pDDI->DrawClippedPrim(pv);
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}
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catch( HRESULT hr )
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{
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return hr;
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}
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return D3D_OK;
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}
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//---------------------------------------------------------------------
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// This function is called by the clipper to draw unclipped part of an
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// indexed primitive
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//
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inline HRESULT DRAW_INDEX_PRIM(D3DFE_PROCESSVERTICES *pv,
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D3DPRIMITIVETYPE primitiveType,
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LPWORD startIndex, DWORD vertexCount, DWORD numPrim)
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{
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pv->lpwIndices = startIndex;
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pv->primType = primitiveType;
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pv->dwNumIndices = vertexCount;
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pv->dwNumPrimitives = numPrim;
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try
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{
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pv->pDDI->DrawIndexPrim(pv);
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}
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catch( HRESULT hr )
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{
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return hr;
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}
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return D3D_OK;
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}
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//----------------------------------------------------------------------
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// Clip a triangle made by 3 vertices
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// bCanModifyVertices is set to TRUE, if the function can modify the original
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// vertices
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//
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HRESULT Clip(D3DFE_PROCESSVERTICES *pv, ClipVertex *cv1, ClipVertex *cv2, ClipVertex *cv3);
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HRESULT ClipLine(D3DFE_PROCESSVERTICES *pv, ClipVertex *cv1, ClipVertex *cv2);
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#endif // _CLIPFUNC_H_
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