gdiplus: Avoid infinite recursion in flatten_bezier().

If either of the recursive calls would have the same x2, y2, x3, and y3 arguments as the current call, the path is as flat as the precision of floats allows. Signed-off-by: Ken Thomases <ken@codeweavers.com> Signed-off-by: Vincent Povirk <vincent@codeweavers.com> Signed-off-by: Alexandre Julliard <julliard@winehq.org>

gdiplus: Avoid infinite recursion in flatten_bezier().
a3f0a591 · Ken Thomases · Alexandre Julliard · 5ff2fdc4 · a3f0a591
Commit a3f0a591 authored Apr 24, 2017 by Ken Thomases Committed by Alexandre Julliard Apr 25, 2017
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graphicspath.c dlls/gdiplus/graphicspath.c +4 -0

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--- a/dlls/gdiplus/graphicspath.c
+++ b/dlls/gdiplus/graphicspath.c
@@ -142,6 +142,10 @@ static BOOL flatten_bezier(path_list_node_t *start, REAL x2, REAL y2, REAL x3, R
    mp[2].X = (mp[1].X + mp[3].X) / 2.0;
    mp[2].Y = (mp[1].Y + mp[3].Y) / 2.0;

+    if ((x2 == mp[0].X && y2 == mp[0].Y && x3 == mp[1].X && y3 == mp[1].Y) ||
+        (x2 == mp[3].X && y2 == mp[3].Y && x3 == mp[4].X && y3 == mp[4].Y))
+        return TRUE;
+
    pt = end->pt;
    pt_st = start->pt;
    /* check flatness as a half of distance between middle point and a linearized path */