Add handling of anti-aliasing for Circular images in IG

Reviewed By: oprisnik

Differential Revision: D50793891

fbshipit-source-id: 106aba2e3706e0262f50b374c0981213025431a6

vito/core-impl/src/main/java/com/facebook/fresco/vito/core/impl/ShapeCalculator.kt

@@ -27,7 +27,11 @@ class ShapeCalculator {
       return when {
         roundingOptions == null -> RectShape(bounds)
         roundingOptions.isCircular -> {
-          CircleShape(bounds.centerX(), bounds.centerY(), min(bounds.width(), bounds.height()) / 2f)
+          CircleShape(
+              bounds.centerX(),
+              bounds.centerY(),
+              min(bounds.width(), bounds.height()) / 2f,
+              roundingOptions.isAntiAliased)
         }
         roundingOptions.hasRoundedCorners() -> {
           when {

vito/renderer/src/main/java/com/facebook/fresco/vito/renderer/Shape.kt

@@ -20,8 +20,25 @@ class RectShape(val rect: RectF) : Shape() {
   override fun draw(canvas: Canvas, paint: Paint) = canvas.drawRect(rect, paint)
 }
 
-class CircleShape(val cx: Float, val cy: Float, val radius: Float) : Shape() {
-  override fun draw(canvas: Canvas, paint: Paint) = canvas.drawCircle(cx, cy, radius, paint)
+class CircleShape(
+    private val cx: Float,
+    private val cy: Float,
+    private val radius: Float,
+    private val antiAliased: Boolean? = null
+) : Shape() {
+  override fun draw(canvas: Canvas, paint: Paint) {
+    if (antiAliased != null) {
+      // Store the value for the anti-alias property this paint has
+      val paintAntiAliasValue = paint.isAntiAlias
+      // Temporarily apply anti-alias property for circle
+      paint.isAntiAlias = antiAliased
+      canvas.drawCircle(cx, cy, radius, paint)
+      // Restore previous value on the paint object to avoid collateral unexpected behaviours
+      paint.isAntiAlias = paintAntiAliasValue
+    } else {
+      canvas.drawCircle(cx, cy, radius, paint)
+    }
+  }
 }
 
 class RoundedRectShape(val rect: RectF, val rx: Float, val ry: Float) : Shape() {