QOutputDev.h

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//========================================================================
//
// XOutputDev.h
//
// Copyright 1996 Derek B. Noonburg
//
//========================================================================

#ifndef QOUTPUTDEV_H
#define QOUTPUTDEV_H

#ifdef __GNUC__
#pragma interface
#endif

#include "aconf.h"
#include <stddef.h>

#include <qscrollview.h>

class Object;

#include "config.h"
#include "CharTypes.h"
#include "GlobalParams.h"
#include "OutputDev.h"

class GString;
class GList;
struct GfxRGB;
class GfxFont;
class GfxSubpath;
class TextPage;
class XOutputFontCache;
class Link;
class Catalog;
class DisplayFontParam;
class UnicodeMap;
class CharCodeToUnicode;


class QPainter;
class QPixmap;
class QPointArray;


typedef fouble fp_t;

//------------------------------------------------------------------------
// Constants
//------------------------------------------------------------------------


//------------------------------------------------------------------------
// Misc types
//------------------------------------------------------------------------


//------------------------------------------------------------------------
// XOutputDev
//------------------------------------------------------------------------

class QOutputDev : public QScrollView, public OutputDev {
        Q_OBJECT

public:

        // Constructor.
        QOutputDev( QWidget *parent = 0, const char *name = 0, int flags = 0 );

        // Destructor.
        virtual ~QOutputDev();

        //---- get info about output device

        // Does this device use upside-down coordinates?
        // (Upside-down means (0,0) is the top left corner of the page.)
        virtual GBool upsideDown() { return gTrue; }

        // Does this device use drawChar() or drawString()?
        virtual GBool useDrawChar() { return gTrue; }

        // Does this device use beginType3Char/endType3Char?  Otherwise,
        // text in Type 3 fonts will be drawn with drawChar/drawString.
        virtual GBool interpretType3Chars() { return gFalse; }
       
        // Does this device need non-text content?
        virtual GBool needNonText() { return gFalse; }

        //----- initialization and control

        // Start a page.
        virtual void startPage(int pageNum, GfxState *state);

        // End a page.
        virtual void endPage();

        //----- link borders
        virtual void drawLink(Link *link, Catalog *catalog);

        //----- save/restore graphics state
        virtual void saveState(GfxState *state);
        virtual void restoreState(GfxState *state);

        //----- update graphics state
        virtual void updateAll(GfxState *state);
        virtual void updateCTM(GfxState *state, fp_t m11, fp_t m12,
                         fp_t m21, fp_t m22, fp_t m31, fp_t m32);
        virtual void updateLineDash(GfxState *state);
        virtual void updateFlatness(GfxState *state);
        virtual void updateLineJoin(GfxState *state);
        virtual void updateLineCap(GfxState *state);
        virtual void updateMiterLimit(GfxState *state);
        virtual void updateLineWidth(GfxState *state);
        virtual void updateFillColor(GfxState *state);
        virtual void updateStrokeColor(GfxState *state);

        //----- update text state
        virtual void updateFont(GfxState *state);

        //----- path painting
        virtual void stroke(GfxState *state);
        virtual void fill(GfxState *state);
        virtual void eoFill(GfxState *state);

        //----- path clipping
        virtual void clip(GfxState *state);
        virtual void eoClip(GfxState *state);

        //----- text drawing
        virtual void beginString(GfxState *state, GString *s);
        virtual void endString(GfxState *state);
        virtual void drawChar(GfxState *state, fp_t x, fp_t y,
                              fp_t dx, fp_t dy,
                              fp_t originX, fp_t originY,
                              CharCode code, Unicode *u, int uLen);

        //----- image drawing
        virtual void drawImageMask(GfxState *state, Object *ref, Stream *str,
                                  int width, int height, GBool invert,
                                  GBool inlineImg);
        virtual void drawImage(GfxState *state, Object *ref, Stream *str,
                               int width, int height, GfxImageColorMap *colorMap,
                               int *maskColors, GBool inlineImg);

        // Find a string.  If <top> is true, starts looking at <l>,<t>;
        // otherwise starts looking at top of page.  If <bottom> is true,
        // stops looking at <l+w-1>,<t+h-1>; otherwise stops looking at bottom
        // of page.  If found, sets the text bounding rectange and returns
        // true; otherwise returns false.
        GBool findText ( Unicode *s, int len, GBool top, GBool bottom, int *xMin, int *yMin, int *xMax, int *yMax );
        
        //----- special QT access

        bool findText ( const QString &str, int &l, int &t, int &w, int &h, bool top = 0, bool bottom = 0 );
        bool findText ( const QString &str, QRect &r, bool top = 0, bool bottom = 0 );

        // Get the text which is inside the specified rectangle.
        QString getText ( int left, int top, int width, int height );
        QString getText ( const QRect &r );

protected:
        virtual void drawContents ( QPainter *p, int, int, int, int );

private:
        QPixmap *m_pixmap;              // pixmap to draw into
        QPainter *m_painter;

        TextPage *m_text;               // text from the current page

private:        
        QFont matchFont ( GfxFont *, fp_t m11, fp_t m12, fp_t m21, fp_t m22 );

        void updateLineAttrs ( GfxState *state, GBool updateDash );
        void doFill ( GfxState *state, bool winding );
        void doClip ( GfxState *state, bool winding );
        int convertPath ( GfxState *state, QPointArray &points, QArray<int> &lengths );
        int convertSubpath ( GfxState *state, GfxSubpath *subpath, QPointArray &points );
};

#endif

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