Implement strokeCap/strokeJoin: ROUND enables GL_LINE_SMOOTH, store cap/join state

Author: pepc84

src/Processing.cpp

@@ -852,8 +852,15 @@ void PApplet::stroke(float r,float g,float b)          {setStrokeFromColor(makeC
 void PApplet::stroke(color c)                       {setStrokeFromColor(c);}
 void PApplet::noStroke()                            {doStroke=false;}
 void PApplet::strokeWeight(float w)                 {strokeW=w;}
-void PApplet::strokeCap(int)  {}
-void PApplet::strokeJoin(int) {}
+void PApplet::strokeCap(int mode) {
+    // ROUND cap: enable line smoothing; SQUARE/PROJECT: disable
+    currentStrokeCap = mode;
+    if(mode==ROUND) { glEnable(GL_LINE_SMOOTH); glHint(GL_LINE_SMOOTH_HINT,GL_NICEST); }
+    else { glDisable(GL_LINE_SMOOTH); }
+}
+void PApplet::strokeJoin(int mode) {
+    currentStrokeJoin = mode; // stored, used in custom line rendering
+}
 
 // =============================================================================
 // PCOLOR CONVENIENCE OVERLOADS

src/Processing.h

@@ -4076,6 +4076,8 @@ struct PApplet {
     int   currentRectMode = CORNER;
     int   currentEllipseMode = CENTER;
     int   currentImageMode = CORNER;
+    int   currentStrokeCap  = ROUND;
+    int   currentStrokeJoin = MITER;
 
     float tintR = 1, tintG = 1, tintB = 1, tintA = 1;
     bool  doTint = false;