95 lines
3.2 KiB
C++
95 lines
3.2 KiB
C++
/******************************Module*Header*******************************\
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*
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* Copyright (c) 1999 Microsoft Corporation
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*
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* Module Name:
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*
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* Region to Path Conversion Class
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*
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* Abstract:
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*
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* Converts an arbitrary GpRegion to GpPath equivalent. It first
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* analyzes the GpRegion for simple conversion cases which it handles.
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* If the region is complex, then it invokes Kirk Olynyk's region to
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* path conversion routine.
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*
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* Notes:
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*
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*
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* Created:
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*
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* 10/29/1999 ericvan
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*
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\**************************************************************************/
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/*********************************Class************************************\
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* class RTP_EPATHOBJ : publci EPATHOBJ *
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* *
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* Adds diagonalization. *
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* *
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* Public Interface: *
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* *
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* History: *
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* Wed 15-Sep-1993 10:06:05 by Kirk Olynyk [kirko] *
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* Wrote it. *
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\**************************************************************************/
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/**************************************************************************\
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* class RTP_PATHMEMOBJ : public PATHMEMOBJ *
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* *
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* This class is for converting regions to paths *
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* *
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\**************************************************************************/
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const FLONG LastPointFlag = 1;
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const UINT MAX_ENUMERATERECTS = 20;
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class RegionToPath
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{
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private:
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BOOL bMoreToEnum;
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const DpRegion *region;
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DynByteArray *types;
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DynByteArray inTypes; // accumulated types
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DynPointArray *points;
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DynPointArray inPoints; // accumulated points
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GpPoint* curPoint;
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BYTE* curType;
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GpPoint* firstPoint; // first point in current subpath
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GpPoint* lastPoint;
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BOOL endSubpath;
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INT outPts; // number of points in output buffer
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GpPoint writePts[2]; // output buffer
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GpPoint AB; // aptfx[1] - aptfx[0]
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INT curIndex; // start of circular buffer (current corner)
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INT lastCount; //
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INT numPts;
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FLONG flags[3];
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GpPoint pts[3];
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FLONG afl[3]; // array of flags for the vertices
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UINT aptfx[3]; // array of vertex positions
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public:
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RegionToPath() {}
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~RegionToPath() {}
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BOOL ConvertRegionToPath(const DpRegion* region,
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DynPointArray& newPoints,
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DynByteArray& newTypes);
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private:
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BOOL DiagonalizePath();
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BOOL FetchNextPoint();
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BOOL WritePoint();
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};
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