Esme Povirk : gdiplus: Fix signs on custom line cap rotation in add_anchor.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: 0400ed7ec7a8b180bf3eef01be54b8a3dc68cbd1
URL:    https://gitlab.winehq.org/wine/wine/-/commit/0400ed7ec7a8b180bf3eef01be54b8a...

Author: Esme Povirk 
Date:   Mon May  6 15:22:50 2024 -0500

gdiplus: Fix signs on custom line cap rotation in add_anchor.

---

dlls/gdiplus/graphicspath.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/dlls/gdiplus/graphicspath.c b/dlls/gdiplus/graphicspath.c
index 94fae70ad88..44077950a87 100644
--- a/dlls/gdiplus/graphicspath.c
+++ b/dlls/gdiplus/graphicspath.c
@@ -2260,8 +2260,8 @@ static void add_anchor(const GpPointF *endpoint, const GpPointF *nextpoint,
             TRACE("GpCustomLineCap fill: %d basecap: %d inset: %f join: %d scale: %f pen_width:%f\n",
                 custom->fill, custom->basecap, custom->inset, custom->join, custom->scale, pen_width);

-        sina = -pen_width * custom->scale * segment_dx / segment_length;
-        cosa = pen_width * custom->scale * segment_dy / segment_length;
+        sina = pen_width * custom->scale * segment_dx / segment_length;
+        cosa = -pen_width * custom->scale * segment_dy / segment_length;

/* Coordination where cap needs to be drawn */
         posx = endpoint->X;
@@ -2277,8 +2277,8 @@ static void add_anchor(const GpPointF *endpoint, const GpPointF *nextpoint,

for (INT i = 0; i < custom->pathdata.Count; i++)
             {
-                tmp_points[i].X = posx + custom->pathdata.Points[i].X * cosa + custom->pathdata.Points[i].Y * sina;
-                tmp_points[i].Y = posy + custom->pathdata.Points[i].X * sina - custom->pathdata.Points[i].Y * cosa;
+                tmp_points[i].X = posx + custom->pathdata.Points[i].X * cosa - custom->pathdata.Points[i].Y * sina;
+                tmp_points[i].Y = posy + custom->pathdata.Points[i].X * sina + custom->pathdata.Points[i].Y * cosa;
             }
             if ((custom->pathdata.Types[custom->pathdata.Count - 1] & PathPointTypeCloseSubpath) == PathPointTypeCloseSubpath)
                 widen_closed_figure(tmp_points, 0, custom->pathdata.Count - 1, pen, pen_width, last_point);
@@ -2291,8 +2291,8 @@ static void add_anchor(const GpPointF *endpoint, const GpPointF *nextpoint,
             for (INT i = 0; i < custom->pathdata.Count; i++)
             {
                 /* rotation of CustomCap according to line */
-                perp_dx = custom->pathdata.Points[i].X * cosa + custom->pathdata.Points[i].Y * sina;
-                perp_dy = custom->pathdata.Points[i].X * sina - custom->pathdata.Points[i].Y * cosa;
+                perp_dx = custom->pathdata.Points[i].X * cosa - custom->pathdata.Points[i].Y * sina;
+                perp_dy = custom->pathdata.Points[i].X * sina + custom->pathdata.Points[i].Y * cosa;
                 *last_point = add_path_list_node(*last_point, posx + perp_dx,
                     posy + perp_dy, custom->pathdata.Types[i]);
             }