gdiplus: Move some Beziers helpers to gdiplus.c to use them for graphicspath.

dlls/gdiplus/gdiplus.c

@@ -285,3 +285,29 @@ REAL convert_unit(HDC hdc, GpUnit unit)
             return 1.0;
     }
 }
+
+/* Calculates Bezier points from cardinal spline points. */
+void calc_curve_bezier(CONST GpPointF *pts, REAL tension, REAL *x1,
+    REAL *y1, REAL *x2, REAL *y2)
+{
+    REAL xdiff, ydiff;
+
+    /* calculate tangent */
+    xdiff = pts[2].X - pts[0].X;
+    ydiff = pts[2].Y - pts[0].Y;
+
+    /* apply tangent to get control points */
+    *x1 = pts[1].X - tension * xdiff;
+    *y1 = pts[1].Y - tension * ydiff;
+    *x2 = pts[1].X + tension * xdiff;
+    *y2 = pts[1].Y + tension * ydiff;
+}
+
+/* Calculates Bezier points from cardinal spline endpoints. */
+void calc_curve_bezier_endp(REAL xend, REAL yend, REAL xadj, REAL yadj,
+    REAL tension, REAL *x, REAL *y)
+{
+    /* tangent at endpoints is the line from the endpoint to the adjacent point */
+    *x = roundr(tension * (xadj - xend) + xend);
+    *y = roundr(tension * (yadj - yend) + yend);
+}

dlls/gdiplus/gdiplus_private.h

@@ -38,6 +38,7 @@
 #define INCH_HIMETRIC (2540)
 
 #define VERSION_MAGIC 0xdbc01001
+#define TENSION_CONST (0.3)
 
 COLORREF ARGB2COLORREF(ARGB color);
 extern INT arc2polybezier(GpPointF * points, REAL x1, REAL y1, REAL x2, REAL y2,
@@ -46,6 +47,11 @@ extern REAL gdiplus_atan2(REAL dy, REAL dx);
 extern GpStatus hresult_to_status(HRESULT res);
 extern REAL convert_unit(HDC hdc, GpUnit unit);
 
+extern void calc_curve_bezier(CONST GpPointF *pts, REAL tension, REAL *x1,
+    REAL *y1, REAL *x2, REAL *y2);
+extern void calc_curve_bezier_endp(REAL xend, REAL yend, REAL xadj, REAL yadj,
+    REAL tension, REAL *x, REAL *y);
+
 static inline INT roundr(REAL x)
 {
     return (INT) floorf(x + 0.5);

dlls/gdiplus/graphics.c

@@ -42,7 +42,6 @@
 WINE_DEFAULT_DEBUG_CHANNEL(gdiplus);
 
 /* looks-right constants */
-#define TENSION_CONST (0.3)
 #define ANCHOR_WIDTH (2.0)
 #define MAX_ITERS (50)
 
@@ -194,34 +193,6 @@ static void draw_pie(GpGraphics *graphics, REAL x, REAL y, REAL width,
         pti[2].y, pti[3].x, pti[3].y);
 }
 
-/* GdipDrawCurve helper function.
- * Calculates Bezier points from cardinal spline points. */
-static void calc_curve_bezier(CONST GpPointF *pts, REAL tension, REAL *x1,
-    REAL *y1, REAL *x2, REAL *y2)
-{
-    REAL xdiff, ydiff;
-
-    /* calculate tangent */
-    xdiff = pts[2].X - pts[0].X;
-    ydiff = pts[2].Y - pts[0].Y;
-
-    /* apply tangent to get control points */
-    *x1 = pts[1].X - tension * xdiff;
-    *y1 = pts[1].Y - tension * ydiff;
-    *x2 = pts[1].X + tension * xdiff;
-    *y2 = pts[1].Y + tension * ydiff;
-}
-
-/* GdipDrawCurve helper function.
- * Calculates Bezier points from cardinal spline endpoints. */
-static void calc_curve_bezier_endp(REAL xend, REAL yend, REAL xadj, REAL yadj,
-    REAL tension, REAL *x, REAL *y)
-{
-    /* tangent at endpoints is the line from the endpoint to the adjacent point */
-    *x = roundr(tension * (xadj - xend) + xend);
-    *y = roundr(tension * (yadj - yend) + yend);
-}
-
 /* Draws the linecap the specified color and size on the hdc.  The linecap is in
  * direction of the line from x1, y1 to x2, y2 and is anchored on x2, y2. Probably
  * should not be called on an hdc that has a path you care about. */