Splines sample.

[wxWidgets.git] / src / gtk / gnome / gprint.cpp

diff --git a/src/gtk/gnome/gprint.cpp b/src/gtk/gnome/gprint.cpp
index 765df86c4e86a984fca60f4f91462a7ee9ee126b..abb1c7db73cd0f53b0e317b572d6f9b04bd6ebc5 100644 (file)
--- a/src/gtk/gnome/gprint.cpp
+++ b/src/gtk/gnome/gprint.cpp
@@ -37,6 +37,7 @@
 #include <libgnomeprintui/gnome-print-job-preview.h>
 #include <libgnomeprintui/gnome-print-paper-selector.h>
 
+static const double RAD2DEG  = 180.0 / M_PI;
 
 #include "wx/html/forcelnk.h"
 FORCE_LINK_ME(gnome_print)
@@ -878,6 +879,58 @@ void wxGnomePrintDC::DoCrossHair(wxCoord x, wxCoord y)
 
 void wxGnomePrintDC::DoDrawArc(wxCoord x1,wxCoord y1,wxCoord x2,wxCoord y2,wxCoord xc,wxCoord yc)
 {
+    double dx = x1 - xc;
+    double dy = y1 - yc;
+    double radius = sqrt((double)(dx*dx+dy*dy));
+    double alpha1, alpha2;
+    if (x1 == x2 && y1 == y2)
+    {
+        alpha1 = 0.0;
+        alpha2 = 360.0;
+    }
+    else
+    if (radius == 0.0)
+    {
+        alpha1 = alpha2 = 0.0;
+    }
+    else
+    {
+        alpha1 = (x1 - xc == 0) ?
+            (y1 - yc < 0) ? 90.0 : -90.0 :
+            -atan2(double(y1-yc), double(x1-xc)) * RAD2DEG;
+        alpha2 = (x2 - xc == 0) ?
+            (y2 - yc < 0) ? 90.0 : -90.0 :
+            -atan2(double(y2-yc), double(x2-xc)) * RAD2DEG;
+            
+        while (alpha1 <= 0)   alpha1 += 360;
+        while (alpha2 <= 0)   alpha2 += 360; // adjust angles to be between
+        while (alpha1 > 360)  alpha1 -= 360; // 0 and 360 degree
+        while (alpha2 > 360)  alpha2 -= 360;
+    }
+
+        if (m_brush.GetStyle() != wxTRANSPARENT)
+        {
+            SetBrush( m_brush );
+            gs_lgp->gnome_print_moveto ( m_gpc, XLOG2DEV(xc), YLOG2DEV(yc) );
+            gs_lgp->gnome_print_arcto( m_gpc, XLOG2DEV(xc), YLOG2DEV(yc), XLOG2DEVREL((int)radius), alpha1, alpha2, 0 );
+        
+            gs_lgp->gnome_print_fill( m_gpc );
+        }
+
+        if (m_pen.GetStyle() != wxTRANSPARENT)
+        {
+            SetPen (m_pen);
+            gs_lgp->gnome_print_newpath( m_gpc );
+            gs_lgp->gnome_print_moveto ( m_gpc, XLOG2DEV(xc), YLOG2DEV(yc) );
+            gs_lgp->gnome_print_arcto( m_gpc, XLOG2DEV(xc), YLOG2DEV(yc), XLOG2DEVREL((int)radius), alpha1, alpha2, 0 );
+            gs_lgp->gnome_print_closepath( m_gpc );
+            
+            gs_lgp->gnome_print_stroke( m_gpc );
+        }
+
+    CalcBoundingBox (x1, y1);
+    CalcBoundingBox (x2, y2);
+    CalcBoundingBox (xc, yc);
 }
 
 void wxGnomePrintDC::DoDrawEllipticArc(wxCoord x,wxCoord y,wxCoord w,wxCoord h,double sa,double ea)
@@ -1161,13 +1214,79 @@ void wxGnomePrintDC::DoDrawEllipse(wxCoord x, wxCoord y, wxCoord width, wxCoord
 
 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 );
 }
 
 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)
 {
-    return false;
+    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 )