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/* Windows Meta File Loader
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*
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* Copyright ( C ) 1998 Stefan Taferner
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* Modified 2002 thierry lorthiois
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or ( at your
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* option ) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABLILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details. You should have received a copy
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* of the GNU General Public License along with this program; if not, write
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* to the Free Software Foundation, Inc, 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#ifndef qwmf_h
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#define qwmf_h
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#include <tqstring.h>
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#include <tqpainter.h>
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#include <tqwmatrix.h>
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#include <tqpointarray.h>
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#include <tqpen.h>
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#include <tqcolor.h>
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#include <tqimage.h>
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#include <tqrect.h>
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class TQBuffer;
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class TQString;
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class WmfCmd;
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class WinObjHandle;
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class WinObjPenHandle;
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class WinObjBrushHandle;
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struct WmfPlaceableHeader;
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/**
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* QWinMetaFile is a WMF viewer based on TQt toolkit
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* How to use QWinMetaFile :
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* <pre>
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* #include "qwmf.h"
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* QWinMetaFile wmf;
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* TQPicture pic; // or TQImage pic;
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* if ( wmf.load( filename )
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* wmf.paint( &pic );
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* </pre>
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*/
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class QWinMetaFile
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{
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public:
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QWinMetaFile();
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virtual ~QWinMetaFile();
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/**
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* Load WMF file.
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* @return true on success.
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*/
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virtual bool load( const TQString &fileName );
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virtual bool load( TQBuffer &buffer );
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/**
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* Paint metafile to given paint-device using absolute or relative coordinate.
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* - absolute coord. Reset the world transfomation Matrix
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* - relative coord. Use the existing world transfomation Matrix
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*
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* @return true on success.
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*/
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virtual bool paint( const TQPaintDevice* target, bool absolute=false );
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/**
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* @return true if the metafile is placeable.
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*/
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bool isPlaceable( void ) const { return mIsPlaceable; }
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/**
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* @return true if the metafile is enhanced.
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*/
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bool isEnhanced( void ) const { return mIsEnhanced; }
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/**
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* @return bounding rectangle
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*/
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TQRect bbox( void ) const { return mBBox; }
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public: // should be protected but cannot
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/* Metafile painter methods */
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/** set window origin */
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void setWindowOrg( long num, short* parms );
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/** set window extents */
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void setWindowExt( long num, short* parms );
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/****************** Drawing *******************/
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/** draw line to coord */
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void lineTo( long num, short* parms );
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/** move pen to coord */
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void moveTo( long num, short* parms );
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/** draw ellipse */
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void ellipse( long num, short* parms );
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/** draw polygon */
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void polygon( long num, short* parms );
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/** draw a list of polygons */
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void polyPolygon( long num, short* parms );
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/** draw series of lines */
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void polyline( long num, short* parms );
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/** draw a rectangle */
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void rectangle( long num, short* parms );
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/** draw round rectangle */
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void roundRect( long num, short* parms );
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/** draw arc */
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void arc( long num, short* parms );
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/** draw chord */
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void chord( long num, short* parms );
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/** draw pie */
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void pie( long num, short* parms );
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/** set polygon fill mode */
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void setPolyFillMode( long num, short* parms );
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/** set background pen color */
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void setBkColor( long num, short* parms );
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/** set background pen mode */
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void setBkMode( long num, short* parms );
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/** set a pixel */
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void setPixel( long num, short* parms );
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/** Set raster operation mode */
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void setRop( long num, short* parms );
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/** save device context */
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void saveDC( long num, short* parms );
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/** restore device context */
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void restoreDC( long num, short* parms );
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/** clipping region is the intersection of this region and the original region */
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void intersectClipRect( long num, short* parms );
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/** delete a clipping rectangle of the original region */
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void excludeClipRect( long num, short* parms );
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/****************** Text *******************/
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/** set text color */
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void setTextColor( long num, short* parms );
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/** set text alignment */
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void setTextAlign( long num, short* parms );
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/** draw text */
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void textOut( long num, short* parms );
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void extTextOut( long num, short* parms );
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/****************** Bitmap *******************/
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/** copies a DIB into a dest location */
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void dibBitBlt( long num, short* parms );
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/** stretches a DIB into a dest location */
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void dibStretchBlt( long num, short* parms );
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void stretchDib( long num, short* parms );
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/** create a pattern brush */
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void dibCreatePatternBrush( long num, short* parms );
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/****************** Object handle *******************/
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/** Activate object handle */
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void selectObject( long num, short* parms );
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/** Free object handle */
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void deleteObject( long num, short* parms );
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/** create an empty object in the object list */
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void createEmptyObject( long num, short* parms );
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/** create a logical brush */
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void createBrushIndirect( long num, short* parms );
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/** create a logical pen */
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void createPenIndirect( long num, short* parms );
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/** create a logical font */
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void createFontIndirect( long num, short* parms );
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/****************** misc *******************/
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/** nothing to do */
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void noop( long , short* );
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/** end of meta file */
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void end( long /*num*/, short* /*parms*/ );
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/** Resolution of the image in dots per inch */
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int dpi( void ) const { return mDpi; }
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protected:
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/** Calculate header checksum */
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unsigned short calcCheckSum( WmfPlaceableHeader* );
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/** Find function in metafunc table by metafile-function.
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Returns index or -1 if not found. */
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virtual int findFunc( unsigned short aFunc ) const;
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/** Fills given parms into mPoints. */
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TQPointArray* pointArray( short num, short* parms );
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/** Returns color given by the two parameters */
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TQColor color( short* parm );
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/** Converts two parameters to long */
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unsigned int toDWord( short* parm );
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/** Convert (x1,y1) and (x2, y2) positions in angle and angleLength */
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void xyToAngle( int xStart, int yStart, int xEnd, int yEnd, int& angle, int& aLength );
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/** Handle win-object-handles */
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void addHandle( WinObjHandle* );
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void deleteHandle( int );
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/** Convert windows rasterOp in TQt rasterOp */
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TQt::RasterOp winToTQtRaster( short parm ) const;
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TQt::RasterOp winToTQtRaster( long parm ) const;
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/** Converts DIB to BMP */
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bool dibToBmp( TQImage& bmp, const char* dib, long size);
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protected:
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TQPainter mPainter;
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bool mIsPlaceable, mIsEnhanced, mValid;
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// coordinate system
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bool mAbsoluteCoord;
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TQWMatrix mInternalWorldMatrix; // memorisation of WMF matrix transformation
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TQRect mHeaderBoundingBox;
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TQRect mBBox;
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// information shared between Metafile Functions
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TQColor mTextColor;
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int mTextAlign, mRotation;
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bool mWinding;
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WmfCmd* mFirstCmd;
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WinObjHandle** mObjHandleTab;
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TQPointArray mPoints;
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int mDpi;
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};
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#endif /*qwmf_h*/
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