X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/12bdd77c85888f29ed94e23ba28d31d99a522598..82eda5ecd0f9e37acc8ed27451000ae58152226d:/src/common/dcbase.cpp

diff --git a/src/common/dcbase.cpp b/src/common/dcbase.cpp
index 73653ffc7d..d7ffb61948 100644
--- a/src/common/dcbase.cpp
+++ b/src/common/dcbase.cpp
@@ -106,6 +106,49 @@ void wxDCBase::DrawPolygon(const wxList *list,
     delete [] points;
 }
 
+void
+wxDCBase::DoDrawPolyPolygon(int n,
+                            int count[],
+                            wxPoint points[],
+                            wxCoord xoffset, wxCoord yoffset,
+                            int fillStyle)
+{
+    if ( n == 1 )
+    {
+        DoDrawPolygon(count[0], points, xoffset, yoffset, fillStyle);
+        return;
+    }
+
+    int      i, j, lastOfs;
+    wxPoint* pts;
+    wxPen    pen;
+
+    for (i = j = lastOfs = 0; i < n; i++)
+    {
+        lastOfs = j;
+        j      += count[i];
+    }
+    pts = new wxPoint[j+n-1];
+    for (i = 0; i < j; i++)
+        pts[i] = points[i];
+    for (i = 2; i <= n; i++)
+    {
+        lastOfs -= count[n-i];
+        pts[j++] = pts[lastOfs];
+    }
+
+    pen = GetPen();
+    SetPen(wxPen(*wxBLACK, 0, wxTRANSPARENT));
+    DoDrawPolygon(j, pts, xoffset, yoffset, fillStyle);
+    SetPen(pen);
+    for (i = j = 0; i < n; i++)
+    {
+        DoDrawLines(count[i], pts+j, xoffset, yoffset);
+        j += count[i];
+    }
+    delete[] pts;
+}
+
 // ----------------------------------------------------------------------------
 // splines
 // ----------------------------------------------------------------------------
@@ -322,6 +365,85 @@ void wxDCBase::DoDrawSpline( wxList *points )
 
 #endif // wxUSE_SPLINES
 
+// ----------------------------------------------------------------------------
+// Partial Text Extents
+// ----------------------------------------------------------------------------
+
+
+// Each element of the widths array will be the width of the string up to and
+// including the coresoponding character in text.  This is the generic
+// implementation, the port-specific classes should do this with native APIs
+// if available and if faster.  Note: pango_layout_index_to_pos is much slower
+// than calling GetTextExtent!!
+
+#define FWC_SIZE 128
+
+class FontWidthCache
+{
+public:
+    FontWidthCache() : m_scaleX(1), m_widths(NULL) { }
+    ~FontWidthCache() { delete []m_widths; }
+    
+    void Reset() 
+    { 
+        if (!m_widths) 
+	    m_widths = new int[FWC_SIZE];
+	    
+        memset(m_widths, 0, sizeof(int)*FWC_SIZE); 
+    } 
+    
+    wxFont m_font;
+    double m_scaleX;
+    int *m_widths;
+};
+
+static FontWidthCache s_fontWidthCache;
+
+bool wxDCBase::DoGetPartialTextExtents(const wxString& text, wxArrayInt& widths) const
+{
+    int totalWidth = 0;
+
+    size_t i, len = text.Length();
+    widths.Empty();
+    widths.Add(0, len);
+    int w, h;
+    
+    // reset the cache if font or horizontal scale have changed
+    if (!s_fontWidthCache.m_widths ||
+        (s_fontWidthCache.m_scaleX != m_scaleX) ||
+        (s_fontWidthCache.m_font != GetFont()))
+    {
+        s_fontWidthCache.Reset();
+        s_fontWidthCache.m_font = GetFont();
+        s_fontWidthCache.m_scaleX = m_scaleX;
+    }
+
+    // Calculate the position of each character based on the widths of
+    // the previous characters
+    for (i=0; i<len; i++) 
+    {
+        const wxChar c = text[i];
+        unsigned int c_int = (unsigned int)c;
+
+        if ((c_int < FWC_SIZE) && (s_fontWidthCache.m_widths[c_int] != 0)) 
+        {
+            w = s_fontWidthCache.m_widths[c_int];
+        }
+        else 
+        {
+            GetTextExtent(c, &w, &h);
+            if (c_int < FWC_SIZE)
+                s_fontWidthCache.m_widths[c_int] = w;
+        }
+
+        totalWidth += w;
+        widths[i] = totalWidth;
+    }
+    
+    return true;
+}
+
+
 // ----------------------------------------------------------------------------
 // enhanced text drawing
 // ----------------------------------------------------------------------------
@@ -617,7 +739,7 @@ void wxDCBase::DoDrawEllipticArcRot( wxCoord x, wxCoord y,
     }
 
     // first draw the pie without pen, if necessary
-	if( GetBrush() != *wxTRANSPARENT_BRUSH )
+    if( GetBrush() != *wxTRANSPARENT_BRUSH )
     {
         wxPen tempPen( GetPen() );
         SetPen( *wxTRANSPARENT_PEN );
@@ -626,7 +748,7 @@ void wxDCBase::DoDrawEllipticArcRot( wxCoord x, wxCoord y,
     }
 
     // then draw the arc without brush, if necessary
-	if( GetPen() != *wxTRANSPARENT_PEN )
+    if( GetPen() != *wxTRANSPARENT_PEN )
     {
         // without center
         DoDrawLines( n-1, points, 0, 0 );