Improving drawing performnace

airk2012 · Sep 21, 2015 · 7173558 · 7173558
1 parent d973ebc
commit 7173558
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Showing 3 changed files with 30 additions and 0 deletions.
diff --git a/Cosmos/CosmosView.swift b/Cosmos/CosmosView.swift
@@ -74,11 +74,24 @@ Shows: ★★★★☆ (132)
     super.init(frame: frame)
     update()
     self.frame.size = intrinsicContentSize()
+
+    improvePerformance()
   }
 
   /// Initializes and returns a newly allocated cosmos view object.
   required public init?(coder aDecoder: NSCoder) {
     super.init(coder: aDecoder)
+
+    improvePerformance()
+  }
+
+  /// Change view settings for faster drawing
+  private func improvePerformance() {
+    /// Cache the view into a bitmap instead of redrawing the stars each time
+    layer.shouldRasterize = true
+    layer.rasterizationScale = UIScreen.mainScreen().scale
+
+    opaque = true
   }
 
   /**

diff --git a/Cosmos/StarLayer.swift b/Cosmos/StarLayer.swift
@@ -64,6 +64,7 @@ struct StarLayer {
     layer.bounds.size = CGSize(width: size, height: size)
     layer.masksToBounds = true
     layer.path = path
+    layer.opaque = true
     return layer
   }
 
@@ -80,6 +81,7 @@ struct StarLayer {
     layer.anchorPoint = CGPoint()
     layer.masksToBounds = true
     layer.bounds.size = CGSize(width: size, height: size)
+    layer.opaque = true
     return layer
   }
 

diff --git a/Distrib/CosmosDistrib.swift b/Distrib/CosmosDistrib.swift
@@ -883,11 +883,24 @@ Shows: ★★★★☆ (132)
     super.init(frame: frame)
     update()
     self.frame.size = intrinsicContentSize()
+
+    improvePerformance()
   }
 
   /// Initializes and returns a newly allocated cosmos view object.
   required public init?(coder aDecoder: NSCoder) {
     super.init(coder: aDecoder)
+
+    improvePerformance()
+  }
+
+  /// Change view settings for faster drawing
+  private func improvePerformance() {
+    /// Cache the view into a bitmap instead of redrawing the stars each time
+    layer.shouldRasterize = true
+    layer.rasterizationScale = UIScreen.mainScreen().scale
+
+    opaque = true
   }
 
   /**
@@ -1272,6 +1285,7 @@ struct StarLayer {
     layer.bounds.size = CGSize(width: size, height: size)
     layer.masksToBounds = true
     layer.path = path
+    layer.opaque = true
     return layer
   }
 
@@ -1288,6 +1302,7 @@ struct StarLayer {
     layer.anchorPoint = CGPoint()
     layer.masksToBounds = true
     layer.bounds.size = CGSize(width: size, height: size)
+    layer.opaque = true
     return layer
   }