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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, Boston, MA 02110-1301,
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* USA.
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*/
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#ifndef qwmf_h
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#define qwmf_h
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#include <qstring.h>
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#include <qpainter.h>
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#include <qwmatrix.h>
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#include <qpointarray.h>
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#include <qpen.h>
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#include <qcolor.h>
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#include <qimage.h>
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#include <qrect.h>
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class QBuffer;
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class QString;
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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 QT toolkit
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* How to use QWinMetaFile :
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* #include "qwmf.h"
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* QWinMetaFile wmf;
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* QPicture pic; // or QImage pic;
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* if ( wmf.load( filename )
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* wmf.paint( &pic );
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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. Returns true on success.
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*/
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virtual bool load( const QString &fileName );
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virtual bool load( QBuffer &buffer );
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/**
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* Paint metafile to given paint-device using absolute or relative coordinate.
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* abosute coord. reset the world transfomation Matrix
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* relative coord. use the existing world transfomation Matrix
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* Returns true on success.
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*/
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virtual bool paint( const QPaintDevice* target, bool absolute=false );
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/**
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* Returns 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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* Returns 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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* Returns bounding rectangle
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*/
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QRect bbox( void ) const { return mBBox; }
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void setBbox( QRect r ) { mBBox = r; }
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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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QPointArray* pointArray( short num, short* parms );
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/** Returns color given by the two parameters */
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QColor 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 QT rasterOp */
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Qt::RasterOp winToQtRaster( short parm ) const;
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Qt::RasterOp winToQtRaster( long parm ) const;
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/** Converts DIB to BMP */
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bool dibToBmp( QImage& bmp, const char* dib, long size);
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protected:
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QPainter 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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QWMatrix mInternalWorldMatrix; // memorisation of WMF matrix transformation
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QRect mHeaderBoundingBox;
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QRect mBBox;
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// informtion shared between Metafile Functions
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QColor 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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QPointArray mPoints;
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int mDpi;
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};
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#endif /*qwmf_h*/
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