butterbur: Fixes for Dot

- Fixed broken round dot
- Default dot to size 10, round cap
- Also fixed seeing dot with size of 1 or 0

Author: jerstlouis

butterbur/src/GraphicalElement.ec

@@ -426,6 +426,8 @@ public class Arc : Shape
 
    shpType = arc;
    innerRadius = 0;
+   stroke.cap = round;
+   stroke.width = 10;
 
 public:
    property Pointf center

butterbur/src/tesselation/shapesTesselation.ec

@@ -57,6 +57,8 @@ struct TesselatedShape
       bool partialSector = false, fullSector = false;
       uint count = 0;
       Array<Array<Pointf>> inner = null;
+      Stroke stroke = shp.stroke;
+      LineCap cap = stroke.cap;
 
       switch(shp.shpType)
       {
@@ -67,6 +69,7 @@ struct TesselatedShape
             nodes = tmpNodes.array;
             nodes[0] = dot.point;
             count = 1;
+            if(cap == flat) cap = square;
             break;
          }
          case ShapeType::path:
@@ -196,8 +199,6 @@ struct TesselatedShape
       }
 
       {
-         Stroke stroke = shp.stroke;
-         LineCap cap = stroke.cap;
          LineJoin join = stroke.join;
          uint i, tc = count;
 
@@ -221,6 +222,8 @@ struct TesselatedShape
             int inc = flip ? -1 : 1;
             uint ni = flip ? tc-1 : 0;
 
+            if(tc == 1 && lineWidth < 2) lineWidth = 2;
+
             vCount = closed ? (tc * (rCount+1)) : (2*(capCount+1) + ((tc > 2) ? (tc-2) * (rCount+1) : 0));
             points = this.points = renew this.points Pointf[vCount];
 
@@ -251,8 +254,6 @@ struct TesselatedShape
 
                if(i == tc + (tc == 1) - 1)
                   end = true;
-               if(i == tc)
-                  i = 0;
 
                {
                   bool thisFlip = false, isCap = false;

butterbur/tests/graphics/butterbur.ec

@@ -370,8 +370,11 @@ class ButterburTest : Window
    Dot dot
    {
       //mge,
-      point = { 300, 300 };
-      stroke = { black, width = 20, cap = square };
+      point = { 250, 300 };
+      stroke = { black, width = 20,
+         cap = round
+         //cap = square
+         };
    };
    GraphicalPresentation dotPresentation {/*gSurface*/ scene, graphic = dot };