Vincent Povirk : gdiplus: Implement LineCapSquare in GdipWidenPath.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: 47c433de8ce9fd894b83a0b96d1963b2ce7ffc16
URL:    http://source.winehq.org/git/wine.git/?a=commit;h=47c433de8ce9fd894b83a0b96d1963b2ce7ffc16

Author: Vincent Povirk <vincent at codeweavers.com>
Date:   Thu Sep 20 15:16:58 2012 -0500

gdiplus: Implement LineCapSquare in GdipWidenPath.

---

 dlls/gdiplus/graphicspath.c |   29 +++++++++++++++++++++++++++--
 1 files changed, 27 insertions(+), 2 deletions(-)

diff --git a/dlls/gdiplus/graphicspath.c b/dlls/gdiplus/graphicspath.c
index 16f5e2d..0515175 100644
--- a/dlls/gdiplus/graphicspath.c
+++ b/dlls/gdiplus/graphicspath.c
@@ -1774,6 +1774,31 @@ static void widen_cap(const GpPointF *endpoint, const GpPointF *nextpoint,
         if (add_last_point)
             add_bevel_point(endpoint, nextpoint, pen, 0, last_point);
         break;
+    case LineCapSquare:
+    {
+        REAL segment_dy = nextpoint->Y-endpoint->Y;
+        REAL segment_dx = nextpoint->X-endpoint->X;
+        REAL segment_length = sqrtf(segment_dy*segment_dy + segment_dx*segment_dx);
+        REAL distance = pen->width/2.0;
+        REAL bevel_dx, bevel_dy;
+        REAL extend_dx, extend_dy;
+
+        extend_dx = -distance * segment_dx / segment_length;
+        extend_dy = -distance * segment_dy / segment_length;
+
+        bevel_dx = -distance * segment_dy / segment_length;
+        bevel_dy = distance * segment_dx / segment_length;
+
+        if (add_first_points)
+            *last_point = add_path_list_node(*last_point, endpoint->X + extend_dx + bevel_dx,
+                endpoint->Y + extend_dy + bevel_dy, PathPointTypeLine);
+
+        if (add_last_point)
+            *last_point = add_path_list_node(*last_point, endpoint->X + extend_dx - bevel_dx,
+                endpoint->Y + extend_dy - bevel_dy, PathPointTypeLine);
+
+        break;
+    }
     }
 }
 
@@ -1878,10 +1903,10 @@ GpStatus WINGDIPAPI GdipWidenPath(GpPath *path, GpPen *pen, GpMatrix *matrix,
     {
         last_point = points;
 
-        if (pen->endcap != LineCapFlat)
+        if (pen->endcap > LineCapSquare)
             FIXME("unimplemented end cap %x\n", pen->endcap);
 
-        if (pen->startcap != LineCapFlat)
+        if (pen->startcap > LineCapSquare)
             FIXME("unimplemented start cap %x\n", pen->startcap);
 
         if (pen->dashcap != DashCapFlat)