gprint.cpp

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                                    XLOG2DEV(x),YLOG2DEV(y + height - rad),
                                    XLOG2DEV(x),YLOG2DEV(y + height),
                                    XLOG2DEV(x + rad),YLOG2DEV(y + height));
        gs_lgp->gnome_print_lineto(m_gpc,XLOG2DEV(x + width - rad),YLOG2DEV(y + height));
        gs_lgp->gnome_print_curveto(m_gpc,
                                    XLOG2DEV(x + width - rad),YLOG2DEV(y + height),
                                    XLOG2DEV(x + width),YLOG2DEV(y + height),
                                    XLOG2DEV(x + width),YLOG2DEV(y + height - rad));
        gs_lgp->gnome_print_lineto(m_gpc,XLOG2DEV(x + width),YLOG2DEV(y + rad));
        gs_lgp->gnome_print_curveto(m_gpc,
                                    XLOG2DEV(x + width),YLOG2DEV(y + rad),
                                    XLOG2DEV(x + width),YLOG2DEV(y),
                                    XLOG2DEV(x + width - rad),YLOG2DEV(y));
        gs_lgp->gnome_print_lineto(m_gpc,XLOG2DEV(x + rad),YLOG2DEV(y));
        gs_lgp->gnome_print_closepath(m_gpc);
        gs_lgp->gnome_print_stroke(m_gpc);

        CalcBoundingBox(x,y);
        CalcBoundingBox(x+width,y+height);
    }
}

void wxGnomePrintDC::makeEllipticalPath(wxCoord x, wxCoord y,
                                        wxCoord width, wxCoord height)
{
    double r = 4 * (sqrt (2) - 1) / 3;
    double  halfW = 0.5 * width,
            halfH = 0.5 * height,
            halfWR = r * halfW,
            halfHR = r * halfH;
    wxCoord halfWI = (wxCoord) halfW,
            halfHI = (wxCoord) halfH;

    gs_lgp->gnome_print_newpath( m_gpc );

    // Approximate an ellipse using four cubic splines, clockwise from 0 deg */
    gs_lgp->gnome_print_moveto( m_gpc,
                XLOG2DEV(x + width),
                YLOG2DEV(y + halfHI) );
    gs_lgp->gnome_print_curveto( m_gpc,
                XLOG2DEV(x + width),
                YLOG2DEV(y + (wxCoord) rint (halfH + halfHR)),
                XLOG2DEV(x + (wxCoord) rint(halfW + halfWR)),
                YLOG2DEV(y + height),
                XLOG2DEV(x + halfWI),
                YLOG2DEV(y + height) );
    gs_lgp->gnome_print_curveto( m_gpc,
                XLOG2DEV(x + (wxCoord) rint(halfW - halfWR)),
                YLOG2DEV(y + height),
                XLOG2DEV(x),
                YLOG2DEV(y + (wxCoord) rint (halfH + halfHR)),
                XLOG2DEV(x), YLOG2DEV(y+halfHI) );
    gs_lgp->gnome_print_curveto( m_gpc,
                XLOG2DEV(x),
                YLOG2DEV(y + (wxCoord) rint (halfH - halfHR)),
                XLOG2DEV(x + (wxCoord) rint (halfW - halfWR)),
                YLOG2DEV(y),
                XLOG2DEV(x+halfWI), YLOG2DEV(y) );
    gs_lgp->gnome_print_curveto( m_gpc,
                XLOG2DEV(x + (wxCoord) rint(halfW + halfWR)),
                YLOG2DEV(y),
                XLOG2DEV(x + width),
                YLOG2DEV(y + (wxCoord) rint(halfH - halfHR)),
                XLOG2DEV(x + width), YLOG2DEV(y + halfHI) );

    gs_lgp->gnome_print_closepath(m_gpc);
}

void wxGnomePrintDC::DoDrawEllipse(wxCoord x, wxCoord y, wxCoord width, wxCoord height)
{
    if (m_brush.GetStyle () != wxTRANSPARENT)
    {
        SetBrush( m_brush );
        makeEllipticalPath( x, y, width, height );
        gs_lgp->gnome_print_fill( m_gpc );
        CalcBoundingBox( x, y );
        CalcBoundingBox( x + width, y + height );
    }

    if (m_pen.GetStyle () != wxTRANSPARENT)
    {
        SetPen (m_pen);
        makeEllipticalPath( x, y, width, height );
        gs_lgp->gnome_print_stroke( m_gpc );
        CalcBoundingBox( x, y );
        CalcBoundingBox( x + width, y + height );
    }
}

#if wxUSE_SPLINES
void wxGnomePrintDC::DoDrawSpline(wxList *points)
{
    SetPen (m_pen);

    double c, d, x1, y1, x2, y2, x3, y3;
    wxPoint *p, *q;

    wxList::compatibility_iterator node = points->GetFirst();
    p = (wxPoint *)node->GetData();
    x1 = p->x;
    y1 = p->y;

    node = node->GetNext();
    p = (wxPoint *)node->GetData();
    c = p->x;
    d = p->y;
    x3 =
         (double)(x1 + c) / 2;
    y3 =
         (double)(y1 + d) / 2;

    gs_lgp->gnome_print_newpath( m_gpc );
    gs_lgp->gnome_print_moveto( m_gpc, XLOG2DEV((wxCoord)x1), YLOG2DEV((wxCoord)y1) );
    gs_lgp->gnome_print_lineto( m_gpc, XLOG2DEV((wxCoord)x3), YLOG2DEV((wxCoord)y3) );

    CalcBoundingBox( (wxCoord)x1, (wxCoord)y1 );
    CalcBoundingBox( (wxCoord)x3, (wxCoord)y3 );

    node = node->GetNext();
    while (node)
    {
        q = (wxPoint *)node->GetData();

        x1 = x3;
        y1 = y3;
        x2 = c;
        y2 = d;
        c = q->x;
        d = q->y;
        x3 = (double)(x2 + c) / 2;
        y3 = (double)(y2 + d) / 2;

        gs_lgp->gnome_print_curveto(m_gpc,
            XLOG2DEV((wxCoord)x1), YLOG2DEV((wxCoord)y1),
            XLOG2DEV((wxCoord)x2), YLOG2DEV((wxCoord)y2),
            XLOG2DEV((wxCoord)x3), YLOG2DEV((wxCoord)y3) );

        CalcBoundingBox( (wxCoord)x1, (wxCoord)y1 );
        CalcBoundingBox( (wxCoord)x3, (wxCoord)y3 );

        node = node->GetNext();
    }

    gs_lgp->gnome_print_lineto ( m_gpc, XLOG2DEV((wxCoord)c), YLOG2DEV((wxCoord)d) );

    gs_lgp->gnome_print_stroke( m_gpc );
}
#endif // wxUSE_SPLINES

bool wxGnomePrintDC::DoBlit(wxCoord xdest, wxCoord ydest, wxCoord width, wxCoord height,
            wxDC *source, wxCoord xsrc, wxCoord ysrc, int rop, bool useMask,
            wxCoord xsrcMask, wxCoord ysrcMask)
{
    wxCHECK_MSG( source, false, wxT("invalid source dc") );

    // blit into a bitmap
    wxBitmap bitmap( width, height );
    wxMemoryDC memDC;
    memDC.SelectObject(bitmap);
    memDC.Blit(0, 0, width, height, source, xsrc, ysrc, rop); /* TODO: Blit transparently? */
    memDC.SelectObject(wxNullBitmap);

    // draw bitmap. scaling and positioning is done there
    DrawBitmap( bitmap, xdest, ydest );

    return true;
}

void wxGnomePrintDC::DoDrawIcon( const wxIcon& icon, wxCoord x, wxCoord y )
{
    DoDrawBitmap( icon, x, y, true );
}

void wxGnomePrintDC::DoDrawBitmap( const wxBitmap& bitmap, wxCoord x, wxCoord y, bool useMask )
{
    if (!bitmap.Ok()) return;

    if (bitmap.HasPixbuf())
    {
        GdkPixbuf *pixbuf = bitmap.GetPixbuf();
        guchar *raw_image = gdk_pixbuf_get_pixels( pixbuf );
        bool has_alpha = gdk_pixbuf_get_has_alpha( pixbuf );
        int rowstride = gdk_pixbuf_get_rowstride( pixbuf );
        int height = gdk_pixbuf_get_height( pixbuf );
        int width = gdk_pixbuf_get_width( pixbuf );

        gs_lgp->gnome_print_gsave( m_gpc );
        double matrix[6];
        matrix[0] = XLOG2DEVREL(width);
        matrix[1] = 0;
        matrix[2] = 0;
        matrix[3] = YLOG2DEVREL(height);
        matrix[4] = XLOG2DEV(x);
        matrix[5] = YLOG2DEV(y+height);
        gs_lgp->gnome_print_concat( m_gpc, matrix );
        gs_lgp->gnome_print_moveto(  m_gpc, 0, 0 );
        if (has_alpha)
            gs_lgp->gnome_print_rgbaimage( m_gpc, (guchar *)raw_image, width, height, rowstride );
        else
            gs_lgp->gnome_print_rgbimage( m_gpc, (guchar *)raw_image, width, height, rowstride );
        gs_lgp->gnome_print_grestore( m_gpc );
    }
    else
    {
        wxImage image = bitmap.ConvertToImage();

        if (!image.Ok()) return;

        gs_lgp->gnome_print_gsave( m_gpc );
        double matrix[6];
        matrix[0] = XLOG2DEVREL(image.GetWidth());
        matrix[1] = 0;
        matrix[2] = 0;
        matrix[3] = YLOG2DEVREL(image.GetHeight());
        matrix[4] = XLOG2DEV(x);
        matrix[5] = YLOG2DEV(y+image.GetHeight());
        gs_lgp->gnome_print_concat( m_gpc, matrix );
        gs_lgp->gnome_print_moveto(  m_gpc, 0, 0 );
        gs_lgp->gnome_print_rgbimage( m_gpc, (guchar*) image.GetData(), image.GetWidth(), image.GetHeight(), image.GetWidth()*3 );
        gs_lgp->gnome_print_grestore( m_gpc );
    }
}

void wxGnomePrintDC::DoDrawText(const wxString& text, wxCoord x, wxCoord y )
{
    DoDrawRotatedText( text, x, y, 0.0 );
}

void wxGnomePrintDC::DoDrawRotatedText(const wxString& text, wxCoord x, wxCoord y, double angle)
{
    x = XLOG2DEV(x);
    y = YLOG2DEV(y);

    bool underlined = m_font.Ok() && m_font.GetUnderlined();

#if wxUSE_UNICODE
    const wxCharBuffer data = wxConvUTF8.cWC2MB( text );
#else
    const wxWCharBuffer wdata = wxConvLocal.cMB2WC( text );
    if ( !wdata )
        return;
    const wxCharBuffer data = wxConvUTF8.cWC2MB( wdata );
#endif

    size_t datalen = strlen((const char*)data);
    pango_layout_set_text( m_layout, (const char*) data, datalen);

    if (underlined)
    {
        PangoAttrList *attrs = pango_attr_list_new();
        PangoAttribute *a = pango_attr_underline_new(PANGO_UNDERLINE_SINGLE);
        a->start_index = 0;
        a->end_index = datalen;
        pango_attr_list_insert(attrs, a);
        pango_layout_set_attributes(m_layout, attrs);
        pango_attr_list_unref(attrs);
    }

    if (m_textForegroundColour.Ok())
    {
        unsigned char red = m_textForegroundColour.Red();
        unsigned char blue = m_textForegroundColour.Blue();
        unsigned char green = m_textForegroundColour.Green();

        if (!(red == m_currentRed && green == m_currentGreen && blue == m_currentBlue))
        {
            double redPS = (double)(red) / 255.0;
            double bluePS = (double)(blue) / 255.0;
            double greenPS = (double)(green) / 255.0;

            gs_lgp->gnome_print_setrgbcolor( m_gpc, redPS, greenPS, bluePS );

            m_currentRed = red;
            m_currentBlue = blue;
            m_currentGreen = green;
        }
    }

    int w,h;

    if (fabs(m_scaleY - 1.0) > 0.00001)
    {
        // If there is a user or actually any scale applied to
        // the device context, scale the font.

        // scale font description
        gint oldSize = pango_font_description_get_size( m_fontdesc );
        double size = oldSize;
        size = size * m_scaleY;
        pango_font_description_set_size( m_fontdesc, (gint)size );

        // actually apply scaled font
        pango_layout_set_font_description( m_layout, m_fontdesc );

        pango_layout_get_pixel_size( m_layout, &w, &h );
#if 0
        if ( m_backgroundMode == wxSOLID )
        {
            gdk_gc_set_foreground(m_textGC, m_textBackgroundColour.GetColor());
            gdk_draw_rectangle(m_window, m_textGC, TRUE, x, y, w, h);
            gdk_gc_set_foreground(m_textGC, m_textForegroundColour.GetColor());
        }
#endif
        // Draw layout.
        gs_lgp->gnome_print_moveto (m_gpc, x, y);
        if (fabs(angle) > 0.00001)
        {
            gs_lgp->gnome_print_gsave( m_gpc );
            gs_lgp->gnome_print_rotate( m_gpc, angle );
            gs_lgp->gnome_print_pango_layout( m_gpc, m_layout );
            gs_lgp->gnome_print_grestore( m_gpc );
        }
        else
        {
            gs_lgp->gnome_print_pango_layout( m_gpc, m_layout );
        }

        // reset unscaled size
        pango_font_description_set_size( m_fontdesc, oldSize );

        // actually apply unscaled font
        pango_layout_set_font_description( m_layout, m_fontdesc );
    }
    else
    {
        pango_layout_get_pixel_size( m_layout, &w, &h );
#if 0
        if ( m_backgroundMode == wxSOLID )
        {
            gdk_gc_set_foreground(m_textGC, m_textBackgroundColour.GetColor());
            gdk_draw_rectangle(m_window, m_textGC, TRUE, x, y, w, h);
            gdk_gc_set_foreground(m_textGC, m_textForegroundColour.GetColor());
        }
#endif
        // Draw layout.
        gs_lgp->gnome_print_moveto (m_gpc, x, y);
        if (fabs(angle) > 0.00001)
        {
            gs_lgp->gnome_print_gsave( m_gpc );
            gs_lgp->gnome_print_rotate( m_gpc, angle );
            gs_lgp->gnome_print_pango_layout( m_gpc, m_layout );
            gs_lgp->gnome_print_grestore( m_gpc );
        }
        else
        {
            gs_lgp->gnome_print_pango_layout( m_gpc, m_layout );
        }
    }

    if (underlined)
    {
        // undo underline attributes setting:
        pango_layout_set_attributes(m_layout, NULL);
    }

    CalcBoundingBox (x + w, y + h);
}

void wxGnomePrintDC::Clear()
{
}

void wxGnomePrintDC::SetFont( const wxFont& font )
{
    m_font = font;

    if (m_font.Ok())
    {
        if (m_fontdesc)
            pango_font_description_free( m_fontdesc );

        m_fontdesc = pango_font_description_copy( m_font.GetNativeFontInfo()->description );

        pango_layout_set_font_description( m_layout, m_fontdesc );
    }
}

void wxGnomePrintDC::SetPen( const wxPen& pen )
{
    if (!pen.Ok()) return;

    m_pen = pen;

    gs_lgp->gnome_print_setlinewidth( m_gpc, XLOG2DEVREL( 1000 * m_pen.GetWidth() ) / 1000.0f );

    static const double dotted[] =  {2.0, 5.0};
    static const double short_dashed[] = {4.0, 4.0};
    static const double wxCoord_dashed[] = {4.0, 8.0};
    static const double dotted_dashed[] = {6.0, 6.0, 2.0, 6.0};

    switch (m_pen.GetStyle())
    {
        case wxDOT:           gs_lgp->gnome_print_setdash( m_gpc, 2, dotted, 0 ); break;
        case wxSHORT_DASH:    gs_lgp->gnome_print_setdash( m_gpc, 2, short_dashed, 0 ); break;
        case wxLONG_DASH:     gs_lgp->gnome_print_setdash( m_gpc, 2, wxCoord_dashed, 0 ); break;