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/*
Copyright (C) 2000, S.R.Haque <shaheedhaque@hotmail.com>.
This file is part of the KDE project
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public License
aS32 with this library; see the file COPYING.LIB. If not, write to
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
DESCRIPTION
This is a generic parser for Windows MetaFiles (WMFs). The output is
a series of callbacks (a.k.a. virtual functions) which the caller can
override as required.
This is based on code originally written by Stefan Taferner
(taferner@kde.org).
*/
#ifndef KWMF_H
#define KWMF_H
#include <tqvaluestack.h>
#include <koffice_export.h>
class TQDataStream;
class TQPointArray;
class KOWMF_EXPORT KWmf
{
public:
// Construction.
KWmf(
unsigned dpi);
virtual ~KWmf();
// Called to parse the given file.
bool parse(
const TQString &file);
bool parse(
TQDataStream &stream,
unsigned size);
class KOWMF_EXPORT DrawContext
{
public:
DrawContext();
bool m_winding;
unsigned m_brushColour;
unsigned m_brushStyle;
unsigned m_penColour;
unsigned m_penStyle;
unsigned m_penWidth;
};
// Should be protected...
void brushSet(
unsigned colour,
unsigned style);
void penSet(
unsigned colour,
unsigned style,
unsigned width);
protected:
// Override to get results of parsing.
virtual void gotEllipse(
const DrawContext &dc,
TQString type,
TQPoint topLeft,
TQSize halfAxes,
unsigned startAngle,
unsigned stopAngle) = 0;
virtual void gotPolygon(
const DrawContext &dc,
const TQPointArray &points) = 0;
virtual void gotPolyline(
const DrawContext &dc,
const TQPointArray &points) = 0;
virtual void gotRectangle(
const DrawContext &dc,
const TQPointArray &points) = 0;
private:
// Debug support.
static const int s_area;
// Use unambiguous names for Microsoft types.
typedef short S16;
typedef int S32;
typedef unsigned int U32;
int m_dpi;
int m_windowOrgX;
int m_windowOrgY;
int m_windowFlipX;
int m_windowFlipY;
DrawContext m_dc;
TQValueStack<DrawContext> m_savedDcs;
TQPoint m_lineFrom;
// Windows handle management.
class WinObjHandle
{
public:
virtual ~WinObjHandle () {}
virtual void apply(KWmf &p) = 0;
};
class WinObjBrushHandle: public WinObjHandle
{
public:
virtual void apply(KWmf &p);
unsigned m_colour;
unsigned m_style;
};
class WinObjPenHandle: public WinObjHandle
{
public:
virtual void apply(KWmf &p);
unsigned m_colour;
unsigned m_style;
unsigned m_width;
};
int handleIndex(void) const;
WinObjPenHandle *handleCreatePen(void);
WinObjBrushHandle *handleCreateBrush(void);
void handleDelete(int idx);
static const int s_maxHandles;
WinObjHandle **m_objectHandles;
unsigned getColour(S32 colour);
TQPoint normalisePoint(
TQDataStream &operands);
TQSize normaliseSize(
TQDataStream &operands);
void genericArc(
TQString type,
TQDataStream &operands);
// Opcode handling and painter methods.
void walk(
U32 words,
TQDataStream &stream);
void skip(
U32 words,
TQDataStream &operands);
void invokeHandler(
S16 opcode,
U32 words,
TQDataStream &operands);
/*
// draw multiple polygons
void opPolypolygon(U32 words, TQDataStream &operands);
*/
void opArc(U32 words, TQDataStream &operands);
// create a logical brush
void opBrushCreateIndirect(U32 words, TQDataStream &operands);
void opEllipse(U32 words, TQDataStream &operands);
// draw line to coord
void opLineTo(U32 words, TQDataStream &operands);
// move pen to coord
void opMoveTo(U32 words, TQDataStream &operands);
// do nothing
void opNoop(U32 words, TQDataStream &operands);
// Free object handle
void opObjectDelete(U32 words, TQDataStream &operands);
// Activate object handle
void opObjectSelect(U32 words, TQDataStream &operands);
// create a logical pen
void opPenCreateIndirect(U32 words, TQDataStream &operands);
void opPie(U32 words, TQDataStream &operands);
// draw polygon
void opPolygon(U32 words, TQDataStream &operands);
// set polygon fill mode
void opPolygonSetFillMode(U32 words, TQDataStream &operands);
// draw series of lines
void opPolyline(U32 words, TQDataStream &operands);
void opRectangle(U32 words, TQDataStream &operands);
// restore drawing context
void opRestoreDc(U32 words, TQDataStream &operands);
// save drawing context
void opSaveDc(U32 words, TQDataStream &operands);
// set window origin
void opWindowSetOrg(U32 words, TQDataStream &operands);
// set window extents
void opWindowSetExt(U32 words, TQDataStream &operands);
/*
// set background pen color
void opsetBkColor(U32 words, TQDataStream &operands);
// set background pen mode
void opsetBkMode(U32 words, TQDataStream &operands);
// Set raster operation mode
void opsetRop(U32 words, TQDataStream &operands);
// Escape (enhanced command set)
void opescape(U32 words, TQDataStream &operands);
*/
};
#endif
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