X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/af58e08750f3e406772139a0a0964ef6a5241f2c..cc4d5638c66a409e421420ed7110917755a66788:/src/common/dcsvg.cpp

diff --git a/src/common/dcsvg.cpp b/src/common/dcsvg.cpp
index 3da7f5090d..6fd0c2a46f 100644
--- a/src/common/dcsvg.cpp
+++ b/src/common/dcsvg.cpp
@@ -3,7 +3,6 @@
 // Purpose:     SVG sample
 // Author:      Chris Elliott
 // Modified by:
-// RCS-ID:      $Id$
 // Licence:     wxWindows licence
 /////////////////////////////////////////////////////////////////////////////
 
@@ -46,55 +45,63 @@ inline wxString NumStr(double f)
     return wxString::FromCDouble(f, 2);
 }
 
-wxString wxPenString(wxColour c, int style = wxPENSTYLE_SOLID)
+// Return the colour representation as HTML-like "#rrggbb" string and also
+// returns its alpha as opacity number in 0..1 range.
+wxString Col2SVG(wxColour c, float *opacity)
 {
-    wxString s = wxT("stroke:") + c.GetAsString(wxC2S_HTML_SYNTAX)  + wxT("; ");
-    // Use the color's alpha value (if not opaque) for the opacity.
-    // Note that a transparent pen will override the alpha value.
-    if (c.Alpha() != wxALPHA_OPAQUE && style != wxPENSTYLE_TRANSPARENT)
+    if ( c.Alpha() != wxALPHA_OPAQUE )
     {
-        s += wxString::Format(wxT("stroke-opacity:%s; "), NumStr(c.Alpha()/255.));
+        *opacity = c.Alpha()/255.;
+
+        // Remove the alpha before using GetAsString(wxC2S_HTML_SYNTAX) as it
+        // doesn't support colours with alpha channel.
+        c = wxColour(c.GetRGB());
     }
-    else
+    else // No alpha.
     {
-        switch ( style )
-        {
-            case wxPENSTYLE_SOLID:
-                s += wxT("stroke-opacity:1.0; ");
-                break;
-            case wxPENSTYLE_TRANSPARENT:
-                s += wxT("stroke-opacity:0.0; ");
-                break;
-            default :
-                wxASSERT_MSG(false, wxT("wxSVGFileDC::Requested Pen Style not available"));
-        }
+        *opacity = 1.;
     }
-    return s;
+
+    return c.GetAsString(wxC2S_HTML_SYNTAX);
 }
 
-wxString wxBrushString(wxColour c, int style = wxBRUSHSTYLE_SOLID)
+wxString wxPenString(wxColour c, int style = wxPENSTYLE_SOLID)
 {
-    wxString s = wxT("fill:") + c.GetAsString(wxC2S_HTML_SYNTAX)  + wxT("; ");
-    // Use the color's alpha value (if not opaque) for the opacity.
-    // Note that a transparent brush will override the alpha value.
-    if (c.Alpha() != wxALPHA_OPAQUE && style != wxBRUSHSTYLE_TRANSPARENT)
+    float opacity;
+    wxString s = wxT("stroke:") + Col2SVG(c, &opacity)  + wxT("; ");
+
+    switch ( style )
     {
-        s += wxString::Format(wxT("fill-opacity:%s; "), NumStr(c.Alpha()/255.));
+        case wxPENSTYLE_SOLID:
+            s += wxString::Format(wxT("stroke-opacity:%s; "), NumStr(opacity));
+            break;
+        case wxPENSTYLE_TRANSPARENT:
+            s += wxT("stroke-opacity:0.0; ");
+            break;
+        default :
+            wxASSERT_MSG(false, wxT("wxSVGFileDC::Requested Pen Style not available"));
     }
-    else
+
+    return s;
+}
+
+wxString wxBrushString(wxColour c, int style = wxBRUSHSTYLE_SOLID)
+{
+    float opacity;
+    wxString s = wxT("fill:") + Col2SVG(c, &opacity)  + wxT("; ");
+
+    switch ( style )
     {
-        switch ( style )
-        {
-            case wxBRUSHSTYLE_SOLID:
-                s += wxT("fill-opacity:1.0; ");
-                break;
-            case wxBRUSHSTYLE_TRANSPARENT:
-                s += wxT("fill-opacity:0.0; ");
-                break;
-            default :
-                wxASSERT_MSG(false, wxT("wxSVGFileDC::Requested Brush Style not available"));
-        }
+        case wxBRUSHSTYLE_SOLID:
+            s += wxString::Format(wxT("fill-opacity:%s; "), NumStr(opacity));
+            break;
+        case wxBRUSHSTYLE_TRANSPARENT:
+            s += wxT("fill-opacity:0.0; ");
+            break;
+        default :
+            wxASSERT_MSG(false, wxT("wxSVGFileDC::Requested Brush Style not available"));
     }
+
     return s;
 }
 
@@ -122,6 +129,9 @@ void wxSVGFileDCImpl::Init (const wxString &filename, int Width, int Height, dou
 
     m_OK = true;
 
+    m_clipUniqueId = 0;
+    m_clipNestingLevel = 0;
+
     m_mm_to_pix_x = dpi/25.4;
     m_mm_to_pix_y = dpi/25.4;
 
@@ -139,27 +149,27 @@ void wxSVGFileDCImpl::Init (const wxString &filename, int Width, int Height, dou
     ////////////////////code here
 
     m_outfile = new wxFileOutputStream(filename);
-    m_OK = m_outfile->Ok ();
+    m_OK = m_outfile->IsOk();
     if (m_OK)
     {
         m_filename = filename;
         m_sub_images = 0;
         wxString s;
-        s = wxT("<?xml version=\"1.0\" standalone=\"no\"?>") + wxString(wxT("\n"));
+        s = wxT("<?xml version=\"1.0\" standalone=\"no\"?>\n");
         write(s);
-        s = wxT("<!DOCTYPE svg PUBLIC \"-//W3C//DTD SVG 20010904//EN\" ") + wxString(wxT("\n"));
+        s = wxT("<!DOCTYPE svg PUBLIC \"-//W3C//DTD SVG 20010904//EN\"\n");
         write(s);
-        s = wxT("\"http://www.w3.org/TR/2001/REC-SVG-20010904/DTD/svg10.dtd\"> ") + wxString(wxT("\n"));
+        s = wxT("\"http://www.w3.org/TR/2001/REC-SVG-20010904/DTD/svg10.dtd\">\n");
         write(s);
-        s = wxT("<svg xmlns=\"http://www.w3.org/2000/svg\" xmlns:xlink=\"http://www.w3.org/1999/xlink\" ") + wxString(wxT("\n"));
+        s = wxT("<svg xmlns=\"http://www.w3.org/2000/svg\" xmlns:xlink=\"http://www.w3.org/1999/xlink\"\n");
         write(s);
-        s.Printf( wxT("    width=\"%scm\" height=\"%scm\" viewBox=\"0 0 %d %d \"> \n"), NumStr(float(Width)/dpi*2.54), NumStr(float(Height)/dpi*2.54), Width, Height );
+        s.Printf( wxT("    width=\"%scm\" height=\"%scm\" viewBox=\"0 0 %d %d \">\n"), NumStr(float(Width)/dpi*2.54), NumStr(float(Height)/dpi*2.54), Width, Height );
         write(s);
-        s = wxT("<title>SVG Picture created as ") + wxFileName(filename).GetFullName() + wxT(" </title>") + wxT("\n");
+        s = wxT("<title>SVG Picture created as ") + wxFileName(filename).GetFullName() + wxT(" </title>\n");
         write(s);
-        s = wxString (wxT("<desc>Picture generated by wxSVG ")) + wxSVGVersion + wxT(" </desc>")+ wxT("\n");
+        s = wxString (wxT("<desc>Picture generated by wxSVG ")) + wxSVGVersion + wxT(" </desc>\n");
         write(s);
-        s =  wxT("<g style=\"fill:black; stroke:black; stroke-width:1\">") + wxString(wxT("\n"));
+        s =  wxT("<g style=\"fill:black; stroke:black; stroke-width:1\">\n");
         write(s);
     }
 }
@@ -187,7 +197,7 @@ wxSize wxSVGFileDCImpl::GetPPI() const
 
 void wxSVGFileDCImpl::DoDrawLine (wxCoord x1, wxCoord y1, wxCoord x2, wxCoord y2)
 {
-    if (m_graphics_changed) NewGraphics ();
+    NewGraphicsIfNeeded();
     wxString s;
     s.Printf ( wxT("<path d=\"M%d %d L%d %d\" /> \n"), x1,y1,x2,y2 );
     if (m_OK)
@@ -196,10 +206,9 @@ void wxSVGFileDCImpl::DoDrawLine (wxCoord x1, wxCoord y1, wxCoord x2, wxCoord y2
     }
     CalcBoundingBox(x1, y1);
     CalcBoundingBox(x2, y2);
-    return;
 }
 
-void wxSVGFileDCImpl::DoDrawLines(int n, wxPoint points[], wxCoord xoffset , wxCoord yoffset )
+void wxSVGFileDCImpl::DoDrawLines(int n, const wxPoint points[], wxCoord xoffset , wxCoord yoffset )
 {
     for ( int i = 1; i < n; i++ )
     {
@@ -211,8 +220,8 @@ void wxSVGFileDCImpl::DoDrawLines(int n, wxPoint points[], wxCoord xoffset , wxC
 void wxSVGFileDCImpl::DoDrawPoint (wxCoord x1, wxCoord y1)
 {
     wxString s;
-    if (m_graphics_changed) NewGraphics ();
-    s = wxT("<g style = \"stroke-linecap:round;\" > ") + wxString(wxT("\n"));
+    NewGraphicsIfNeeded();
+    s = wxT("<g style = \"stroke-linecap:round;\" > \n");
     write(s);
     DoDrawLine ( x1,y1,x1,y1 );
     s = wxT("</g>");
@@ -232,7 +241,7 @@ void wxSVGFileDCImpl::DoDrawText(const wxString& text, wxCoord x1, wxCoord y1)
 void wxSVGFileDCImpl::DoDrawRotatedText(const wxString& sText, wxCoord x, wxCoord y, double angle)
 {
     //known bug; if the font is drawn in a scaled DC, it will not behave exactly as wxMSW
-    if (m_graphics_changed) NewGraphics ();
+    NewGraphicsIfNeeded();
     wxString s, sTmp;
 
     // calculate bounding box
@@ -246,28 +255,31 @@ void wxSVGFileDCImpl::DoDrawRotatedText(const wxString& sText, wxCoord x, wxCoor
     CalcBoundingBox((wxCoord)(x + w*cos(rad)), (wxCoord)(y - h*sin(rad)));
 
     // wxT("bottom left") and wxT("bottom right")
-    x += (wxCoord)(h*sin(rad));
-    y += (wxCoord)(h*cos(rad));
-    CalcBoundingBox(x, y);
     CalcBoundingBox((wxCoord)(x + h*sin(rad)), (wxCoord)(y + h*cos(rad)));
+    CalcBoundingBox((wxCoord)(x + h*sin(rad) + w*cos(rad)), (wxCoord)(y + h*cos(rad) - w*sin(rad)));
 
     if (m_backgroundMode == wxBRUSHSTYLE_SOLID)
     {
         // draw background first
         // just like DoDrawRectangle except we pass the text color to it and set the border to a 1 pixel wide text background
 
-        sTmp.Printf ( wxT(" <rect x=\"%d\" y=\"%d\" width=\"%d\" height=\"%d\" "), x,y+desc-h, w, h );
+        sTmp.Printf ( wxT(" <rect x=\"%d\" y=\"%d\" width=\"%d\" height=\"%d\" "), x, y, w, h );
         s = sTmp + wxT("style=\"") + wxBrushString(m_textBackgroundColour);
         s += wxT("stroke-width:1; ") + wxPenString(m_textBackgroundColour);
         sTmp.Printf ( wxT("\" transform=\"rotate( %s %d %d )  \" />"), NumStr(-angle), x,y );
         s += sTmp + wxT("\n");
         write(s);
     }
+
+    // convert x,y to SVG text x,y (the coordinates of the text baseline)
+    x = (wxCoord)(x + (h-desc)*sin(rad));
+    y = (wxCoord)(y + (h-desc)*cos(rad));
+
     //now do the text itself
     s.Printf (wxT(" <text x=\"%d\" y=\"%d\" "),x,y );
 
-    sTmp = m_font.GetFaceName ();
-    if (sTmp.Len () > 0)  s += wxT("style=\"font-family:") + sTmp + wxT("; ");
+    sTmp = m_font.GetFaceName();
+    if (sTmp.Len() > 0)  s += wxT("style=\"font-family:") + sTmp + wxT("; ");
     else s += wxT("style=\" ");
 
     wxString fontweights [3] = { wxT("normal"), wxT("lighter"), wxT("bold") };
@@ -276,7 +288,7 @@ void wxSVGFileDCImpl::DoDrawRotatedText(const wxString& sText, wxCoord x, wxCoor
     wxString fontstyles [5] = { wxT("normal"), wxT("style error"), wxT("style error"), wxT("italic"), wxT("oblique") };
     s += wxT("font-style:") + fontstyles[m_font.GetStyle() - wxNORMAL] + wxT("; ");
 
-    sTmp.Printf (wxT("font-size:%dpt; "), m_font.GetPointSize () );
+    sTmp.Printf (wxT("font-size:%dpt; "), m_font.GetPointSize() );
     s += sTmp;
     //text will be solid, unless alpha value isn't opaque in the foreground colour
     s += wxBrushString(m_textForegroundColour) + wxPenString(m_textForegroundColour);
@@ -296,7 +308,7 @@ void wxSVGFileDCImpl::DoDrawRectangle(wxCoord x, wxCoord y, wxCoord width, wxCoo
 void wxSVGFileDCImpl::DoDrawRoundedRectangle(wxCoord x, wxCoord y, wxCoord width, wxCoord height, double radius )
 
 {
-    if (m_graphics_changed) NewGraphics ();
+    NewGraphicsIfNeeded();
     wxString s;
 
     s.Printf ( wxT(" <rect x=\"%d\" y=\"%d\" width=\"%d\" height=\"%d\" rx=\"%s\" "),
@@ -309,11 +321,11 @@ void wxSVGFileDCImpl::DoDrawRoundedRectangle(wxCoord x, wxCoord y, wxCoord width
     CalcBoundingBox(x + width, y + height);
 }
 
-void wxSVGFileDCImpl::DoDrawPolygon(int n, wxPoint points[],
+void wxSVGFileDCImpl::DoDrawPolygon(int n, const wxPoint points[],
                                     wxCoord xoffset, wxCoord yoffset,
                                     wxPolygonFillMode fillStyle)
 {
-    if (m_graphics_changed) NewGraphics ();
+    NewGraphicsIfNeeded();
     wxString s, sTmp;
     s = wxT("<polygon style=\"");
     if ( fillStyle == wxODDEVEN_RULE )
@@ -336,7 +348,7 @@ void wxSVGFileDCImpl::DoDrawPolygon(int n, wxPoint points[],
 void wxSVGFileDCImpl::DoDrawEllipse (wxCoord x, wxCoord y, wxCoord width, wxCoord height)
 
 {
-    if (m_graphics_changed) NewGraphics ();
+    NewGraphicsIfNeeded();
 
     int rh = height /2;
     int rw = width  /2;
@@ -362,7 +374,7 @@ void wxSVGFileDCImpl::DoDrawArc(wxCoord x1, wxCoord y1, wxCoord x2, wxCoord y2,
 
     Might be better described as Pie drawing */
 
-    if (m_graphics_changed) NewGraphics ();
+    NewGraphicsIfNeeded();
     wxString s;
 
     // we need the radius of the circle which has two estimates
@@ -421,7 +433,7 @@ void wxSVGFileDCImpl::DoDrawEllipticArc(wxCoord x,wxCoord y,wxCoord w,wxCoord h,
 
     //known bug: SVG draws with the current pen along the radii, but this does not happen in wxMSW
 
-    if (m_graphics_changed) NewGraphics ();
+    NewGraphicsIfNeeded();
 
     wxString s;
     //radius
@@ -460,6 +472,59 @@ void wxSVGFileDCImpl::DoDrawEllipticArc(wxCoord x,wxCoord y,wxCoord w,wxCoord h,
     }
 }
 
+void wxSVGFileDCImpl::DoSetClippingRegion( int x,  int y, int width, int height )
+{
+    wxString svg;
+
+    // End current graphics group to ensure proper xml nesting (e.g. so that
+    // graphics can be subsequently changed inside the clipping region)
+    svg << "</g>\n"
+           "<defs>\n"
+           "<clipPath id=\"clip" << m_clipNestingLevel << "\">\n"
+           "<rect id=\"cliprect" << m_clipNestingLevel << "\" "
+                "x=\"" << x << "\" "
+                "y=\"" << y << "\" "
+                "width=\"" << width << "\" "
+                "height=\"" << height << "\" "
+                "style=\"stroke: gray; fill: none;\"/>\n"
+           "</clipPath>\n"
+           "</defs>\n"
+           "<g style=\"clip-path: url(#clip" << m_clipNestingLevel << ");\">\n";
+
+    write(svg);
+
+    // Re-apply current graphics to ensure proper xml nesting
+    DoStartNewGraphics();
+
+    m_clipUniqueId++;
+    m_clipNestingLevel++;
+}
+
+void wxSVGFileDCImpl::DestroyClippingRegion()
+{
+    wxString svg;
+
+    // End current graphics element to ensure proper xml nesting (e.g. graphics
+    // might have been changed inside the clipping region)
+    svg << "</g>\n";
+
+    // Close clipping group elements
+    for ( size_t i = 0; i < m_clipUniqueId; i++ )
+    {
+        svg << "</g>";
+    }
+    svg << "\n";
+
+    write(svg);
+
+    // Re-apply current graphics (e.g. brush may have been changed inside one
+    // of the clipped regions - that change will have been lost after xml
+    // elements for the clipped region have been closed).
+    DoStartNewGraphics();
+
+    m_clipUniqueId = 0;
+}
+
 void wxSVGFileDCImpl::DoGetTextExtent(const wxString& string, wxCoord *w, wxCoord *h, wxCoord *descent , wxCoord *externalLeading , const wxFont *font) const
 
 {
@@ -471,12 +536,11 @@ void wxSVGFileDCImpl::DoGetTextExtent(const wxString& string, wxCoord *w, wxCoor
 }
 
 wxCoord wxSVGFileDCImpl::GetCharHeight() const
-
 {
     wxScreenDC sDC;
     sDC.SetFont (m_font);
 
-    return ( sDC.GetCharHeight() );
+    return sDC.GetCharHeight();
 
 }
 
@@ -485,8 +549,7 @@ wxCoord wxSVGFileDCImpl::GetCharWidth() const
     wxScreenDC sDC;
     sDC.SetFont (m_font);
 
-    return ( sDC.GetCharWidth() );
-
+    return sDC.GetCharWidth();
 }
 
 
@@ -496,21 +559,17 @@ wxCoord wxSVGFileDCImpl::GetCharWidth() const
 
 void wxSVGFileDCImpl::SetBackground( const wxBrush &brush )
 {
-
     m_backgroundBrush = brush;
-    return;
 }
 
 
 void wxSVGFileDCImpl::SetBackgroundMode( int mode )
 {
     m_backgroundMode = mode;
-    return;
 }
 
 
 void wxSVGFileDCImpl::SetBrush(const wxBrush& brush)
-
 {
     m_brush = brush;
 
@@ -527,14 +586,26 @@ void wxSVGFileDCImpl::SetPen(const wxPen& pen)
     m_graphics_changed = true;
 }
 
-void wxSVGFileDCImpl::NewGraphics ()
+void wxSVGFileDCImpl::NewGraphicsIfNeeded()
 {
-    wxString s, sBrush, sPenCap, sPenJoin, sPenStyle, sLast, sWarn;
+    if ( !m_graphics_changed )
+        return;
+
+    m_graphics_changed = false;
+
+    write(wxS("</g>\n"));
+
+    DoStartNewGraphics();
+}
 
-    sBrush = wxT("</g>\n<g style=\"") + wxBrushString ( m_brush.GetColour (), m_brush.GetStyle () )
+void wxSVGFileDCImpl::DoStartNewGraphics()
+{
+    wxString s, sBrush, sPenCap, sPenJoin, sPenStyle, sLast;
+
+    sBrush = wxS("<g style=\"") + wxBrushString ( m_brush.GetColour(), m_brush.GetStyle() )
             + wxPenString(m_pen.GetColour(), m_pen.GetStyle());
 
-    switch ( m_pen.GetCap () )
+    switch ( m_pen.GetCap() )
     {
         case  wxCAP_PROJECTING :
             sPenCap = wxT("stroke-linecap:square; ");
@@ -545,8 +616,9 @@ void wxSVGFileDCImpl::NewGraphics ()
         case    wxCAP_ROUND :
         default :
             sPenCap = wxT("stroke-linecap:round; ");
-    };
-    switch ( m_pen.GetJoin () )
+    }
+
+    switch ( m_pen.GetJoin() )
     {
         case  wxJOIN_BEVEL :
             sPenJoin = wxT("stroke-linejoin:bevel; ");
@@ -557,14 +629,13 @@ void wxSVGFileDCImpl::NewGraphics ()
         case    wxJOIN_ROUND :
         default :
             sPenJoin = wxT("stroke-linejoin:round; ");
-    };
+    }
 
     sLast.Printf( wxT("stroke-width:%d\" \n   transform=\"translate(%s %s) scale(%s %s)\">"),
                 m_pen.GetWidth(), NumStr(m_logicalOriginX), NumStr(m_logicalOriginY), NumStr(m_scaleX), NumStr(m_scaleY)  );
 
-    s = sBrush + sPenCap + sPenJoin + sPenStyle + sLast + wxT("\n") + sWarn;
+    s = sBrush + sPenCap + sPenJoin + sPenStyle + sLast + wxT("\n");
     write(s);
-    m_graphics_changed = false;
 }
 
 
@@ -607,12 +678,11 @@ void wxSVGFileDCImpl::DoDrawIcon(const class wxIcon & myIcon, wxCoord x, wxCoord
     memDC.DrawIcon(myIcon,0,0);
     memDC.SelectObject( wxNullBitmap );
     DoDrawBitmap(myBitmap, x, y);
-    return;
 }
 
 void wxSVGFileDCImpl::DoDrawBitmap(const class wxBitmap & bmp, wxCoord x, wxCoord y , bool  WXUNUSED(bTransparent) /*=0*/ )
 {
-    if (m_graphics_changed) NewGraphics ();
+    NewGraphicsIfNeeded();
 
     wxString sTmp, s, sPNG;
     if ( wxImage::FindHandler(wxBITMAP_TYPE_PNG) == NULL )
@@ -649,16 +719,14 @@ void wxSVGFileDCImpl::DoDrawBitmap(const class wxBitmap & bmp, wxCoord x, wxCoor
     {
         write(s);
     }
-    m_OK = m_outfile->Ok () && bPNG_OK;
-
-    return;
+    m_OK = m_outfile->IsOk() && bPNG_OK;
 }
 
 void wxSVGFileDCImpl::write(const wxString &s)
 {
     const wxCharBuffer buf = s.utf8_str();
     m_outfile->Write(buf, strlen((const char *)buf));
-    m_OK = m_outfile->Ok();
+    m_OK = m_outfile->IsOk();
 }