From 5a35e6babcff11280aac48c697a339d449388662 Mon Sep 17 00:00:00 2001
From: Wonki Kim <wonki_.kim@samsung.com>
Date: Wed, 8 Jun 2016 17:46:55 +0900
Subject: [PATCH] efl_gfx_shape: Improve coordinate cacluation of vector
 graphic

Improvements have been already applied in Tizen 2.4 to resolve
the problem that the renderer don't draw a circle properly,
when a radius of the circle is odd.
Then this commit will resolve the same problem in Tizen 3.0.

Change-Id: Ibf856375c97ea811d4946fad0a1fad6d1f818451
Signed-off-by: Wonki Kim <wonki_.kim@samsung.com>
---
 src/lib/efl/interfaces/efl_gfx_shape.c | 64 ++++++++++++----------------------
 1 file changed, 23 insertions(+), 41 deletions(-)

diff --git a/src/lib/efl/interfaces/efl_gfx_shape.c b/src/lib/efl/interfaces/efl_gfx_shape.c
index 184f39e..09b4bb4 100644
--- a/src/lib/efl/interfaces/efl_gfx_shape.c
+++ b/src/lib/efl/interfaces/efl_gfx_shape.c
@@ -823,8 +823,8 @@ typedef struct _Bezier
 
 typedef struct _Point
 {
-   int x;
-   int y;
+   double x;
+   double y;
 }Point;
 
 static
@@ -938,8 +938,8 @@ _efl_gfx_t_for_arc_angle(double angle)
 }
 
 static void
-_find_ellipse_coords(int x, int y, int w, int h, double angle, double length,
-                            Point* start_point, Point *end_point)
+_find_ellipse_coords(double x, double y, double w, double h, double angle, double length,
+                     Point* start_point, Point *end_point)
 {
    if (!w || !h )
      {
@@ -950,8 +950,8 @@ _find_ellipse_coords(int x, int y, int w, int h, double angle, double length,
         return;
      }
 
-   int w2 = w / 2;
-   int h2 = h / 2;
+   double w2 = w / 2;
+   double h2 = h / 2;
 
    double angles[2] = { angle, angle + length };
    Point *points[2] = { start_point, end_point };
@@ -985,8 +985,8 @@ _find_ellipse_coords(int x, int y, int w, int h, double angle, double length,
         // top quadrants
         if (quadrant == 0 || quadrant == 1)
           py = -py;
-        int cx = x+w/2;
-        int cy = y+h/2;
+        double cx = x+w/2;
+        double cy = y+h/2;
         points[i]->x = cx + w2 * px;
         points[i]->y = cy + h2 * py;
      }
@@ -994,16 +994,16 @@ _find_ellipse_coords(int x, int y, int w, int h, double angle, double length,
 
 //// The return value is the starting point of the arc
 static
-Point _curves_for_arc(int x, int y, int w, int h,
+Point _curves_for_arc(double x, double y, double w, double h,
                       double start_angle, double sweep_length,
                       Point *curves, int *point_count)
 {
    *point_count = 0;
-   int w2 = w / 2;
-   int w2k = w2 * PATH_KAPPA;
+   double w2 = w / 2;
+   double w2k = w2 * PATH_KAPPA;
 
-   int h2 = h / 2;
-   int h2k = h2 * PATH_KAPPA;
+   double h2 = h / 2;
+   double h2k = h2 * PATH_KAPPA;
 
    Point points[16] =
    {
@@ -1147,11 +1147,6 @@ _efl_gfx_shape_append_arc(Eo *obj, Efl_Gfx_Shape_Data *pd,
 {
    int point_count;
    Point pts[15];
-   // FIXME: make the radius even, as the default
-   // renderer unable to generate a perfect arc in case of odd radius.
-   // remove the below line once the rle generation is fixed for the same.
-   if (((int)w & 1)) w = w-1;
-   if (((int)h & 1)) h = h-1;
 
    Point curve_start = _curves_for_arc(x, y, w, h, start_angle, sweep_length, pts, &point_count);
    int i;
@@ -1186,11 +1181,6 @@ _efl_gfx_shape_append_circle(Eo *obj, Efl_Gfx_Shape_Data *pd,
                              double xc, double yc, double radius)
 {
    _efl_gfx_shape_append_arc(obj, pd, xc - radius, yc - radius, 2*radius, 2*radius, 0, 360);
-#if 0
-   _efl_gfx_shape_append_move_to(obj, pd, xc - radius, yc);
-   _efl_gfx_shape_append_arc_to(obj, pd, xc + radius, yc, radius, radius, 0, EINA_TRUE, EINA_TRUE);
-   _efl_gfx_shape_append_arc_to(obj, pd, xc - radius, yc, radius, radius, 0, EINA_TRUE, EINA_TRUE);
-#endif
 }
 
 static void
@@ -1198,6 +1188,16 @@ _efl_gfx_shape_append_rect(Eo *obj, Efl_Gfx_Shape_Data *pd,
                            double x, double y, double w, double h,
                            double rx, double ry)
 {
+   if (!rx || !ry)
+     {
+         _efl_gfx_shape_append_move_to(obj, pd, x, y);
+         _efl_gfx_shape_append_line_to(obj, pd, x + w, y);
+         _efl_gfx_shape_append_line_to(obj, pd, x + w, y + h);
+         _efl_gfx_shape_append_line_to(obj, pd, x, y + h);
+         _efl_gfx_shape_append_close(obj, pd);
+
+         return;
+     }
    // clamp the rx and ry radius value.
    rx = 2*rx;
    ry = 2*ry;
@@ -1209,24 +1209,6 @@ _efl_gfx_shape_append_rect(Eo *obj, Efl_Gfx_Shape_Data *pd,
    _efl_gfx_shape_append_arc(obj, pd, x + w - rx, y, rx, ry, 90, -90);
    _efl_gfx_shape_append_arc(obj, pd, x + w - rx, y + h - ry, rx, ry, 0, -90);
    _efl_gfx_shape_append_arc(obj, pd, x, y + h - ry, rx, ry, 270, -90);
-#if 0
-   // clamp the x and y radius value.
-   if (rx > w/2) rx = w/2;
-   if (ry > h/2) ry = h/2;
-
-   _efl_gfx_shape_append_move_to(obj, pd, x, y + ry);
-   // Top left corner
-   _efl_gfx_shape_append_arc_to(obj, pd, x + rx, y, rx, ry, 0, EINA_FALSE, EINA_TRUE);
-   _efl_gfx_shape_append_line_to(obj, pd, x + w - rx, y);
-   // Top right corner
-   _efl_gfx_shape_append_arc_to(obj, pd, x + w, y + ry, rx, ry, 0, EINA_FALSE, EINA_TRUE);
-   _efl_gfx_shape_append_line_to(obj, pd, x + w, y + h - ry);
-   // Bottom right corner
-   _efl_gfx_shape_append_arc_to(obj, pd, x + w - rx, y + h, rx, ry, 0, EINA_FALSE, EINA_TRUE);
-   _efl_gfx_shape_append_line_to(obj, pd, x + rx, y + h);
-   // Bottom left corner
-   _efl_gfx_shape_append_arc_to(obj, pd, x, y + h - ry, rx, ry, 0, EINA_FALSE, EINA_TRUE);
-#endif
    _efl_gfx_shape_append_close(obj, pd);
 }
 
-- 
2.7.4