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# Rasterizer.h

    00001 /*
    00002  *      Copyright (C) 2003-2005 Gabest
    00003  *      http://www.gabest.org
    00004  *
    00005  *  This Program is free software; you can redistribute it and/or modify
    00006  *  it under the terms of the GNU General Public License as published by
    00007  *  the Free Software Foundation; either version 2, or (at your option)
    00008  *  any later version.
    00009  *
    00010  *  This Program is distributed in the hope that it will be useful,
    00011  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
    00012  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
    00013  *  GNU General Public License for more details.
    00014  *
    00015  *  You should have received a copy of the GNU General Public License
    00016  *  along with GNU Make; see the file COPYING.  If not, write to
    00017  *  the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
    00018  *  http://www.gnu.org/copyleft/gpl.html
    00019  *
    00020  */
    00021
    00022 #pragma once
    00023
    00024 #include <vector>
    00025 #include "..\SubPic\ISubPic.h"
    00026
    00027 #define PT_MOVETONC 0xfe
    00028 #define PT_BSPLINETO 0xfc
    00029 #define PT_BSPLINEPATCHTO 0xfa
    00030
    00031 class Rasterizer
    00032 {
    00033         bool fFirstSet;
    00034         CPoint firstp, lastp;
    00035
    00036 protected:
    00037         BYTE* mpPathTypes;
    00038         POINT* mpPathPoints;
    00039         int mPathPoints;
    00040
    00041 private:
    00042         int mWidth, mHeight;
    00043
    00044         typedef std::pair<unsigned __int64, unsigned __int64> tSpan;
    00045         typedef std::vector<tSpan> tSpanBuffer;
    00046
    00047         tSpanBuffer mOutline;
    00048         tSpanBuffer mWideOutline;
    00049         int mWideBorder;
    00050
    00051         struct Edge {
    00052                 int next;
    00053                 int posandflag;
    00054         } *mpEdgeBuffer;
    00055         unsigned mEdgeHeapSize;
    00056         unsigned mEdgeNext;
    00057
    00058         unsigned int* mpScanBuffer;
    00059
    00060         typedef unsigned char byte;
    00061
    00062 protected:
    00063         byte *mpOverlayBuffer;
    00064         int mOverlayWidth, mOverlayHeight;
    00065         int mPathOffsetX, mPathOffsetY;
    00066         int mOffsetX, mOffsetY;
    00067
    00068 private:
    00069         void _TrashPath();
    00070         void _TrashOverlay();
    00071         void _ReallocEdgeBuffer(int edges);
    00072         void _EvaluateBezier(int ptbase, bool fBSpline);
    00073         void _EvaluateLine(int pt1idx, int pt2idx);
    00074         void _EvaluateLine(int x0, int y0, int x1, int y1);
    00075         static void _OverlapRegion(tSpanBuffer& dst, tSpanBuffer& src, int dx, int dy);
    00076
    00077 public:
    00078         Rasterizer();
    00079         virtual ~Rasterizer();
    00080
    00081         bool BeginPath(HDC hdc);
    00082         bool EndPath(HDC hdc);
    00083         bool PartialBeginPath(HDC hdc, bool bClearPath);
    00084         bool PartialEndPath(HDC hdc, long dx, long dy);
    00085         bool ScanConvert();
    00086         bool CreateWidenedRegion(int border);
    00087         void DeleteOutlines();
    00088         bool Rasterize(int xsub, int ysub, bool fBlur);
    00089         CRect Draw(SubPicDesc& spd, CRect& clipRect, byte* pAlphaMask, int xsub, int ysub, const long* switchpts, bool fBody, bool fBorder);
    00090 };
    00091