Lots of updates

- Add unlock
- Update Sorting menu
- Prepare to load multiple tile images
- New logging
- Calculate thumbnails and colors before schowing grid

CapCollector/Extensions/UIColor+Extensions.swift

@@ -10,13 +10,13 @@ import UIKit
 
 extension UIColor {
     
-    var rgb: (red: Int, green: Int, blue: Int) {
+    var rgb: (red: Double, green: Double, blue: Double) {
         var fRed: CGFloat = 0
         var fGreen: CGFloat = 0
         var fBlue: CGFloat = 0
         var fAlpha: CGFloat = 0
         getRed(&fRed, green: &fGreen, blue: &fBlue, alpha: &fAlpha)
-        return (Int(fRed * 255.0), Int(fGreen * 255.0), Int(fBlue * 255.0))
+        return (Double(fRed), Double(fGreen), Double(fBlue))
     }
 }
 

CapCollector/Extensions/UIImage+Extensions.swift

@@ -89,6 +89,35 @@ extension UIImage {
 
 extension CIImage {
     
+    func averageColor(context: CIContext) -> UIColor? {
+        let extentVector = CIVector(
+            x: extent.origin.x,
+            y: extent.origin.y,
+            z: extent.size.width,
+            w: extent.size.height)
+        
+        guard let filter = CIFilter(name: "CIAreaAverage", parameters: [kCIInputImageKey: self, kCIInputExtentKey: extentVector]) else {
+            log("Failed to create filter")
+            return nil
+        }
+        guard let outputImage = filter.outputImage else {
+            log("Failed get filter output")
+            return nil
+        }
+        
+        var bitmap = [UInt8](repeating: 0, count: 4)
+        
+        context.render(outputImage, toBitmap: &bitmap, rowBytes: 4,
+                       bounds: CGRect(x: 0, y: 0, width: 1, height: 1),
+                       format: .RGBA8, colorSpace: nil)
+        
+        return UIColor(
+            red: saturate(bitmap[0]),
+            green: saturate(bitmap[1]),
+            blue: saturate(bitmap[2]),
+            alpha: CGFloat(bitmap[3]) / 255)
+    }
+    
     var averageColor: UIColor? {
         let extentVector = CIVector(
             x: extent.origin.x,
@@ -106,8 +135,13 @@ extension CIImage {
         }
         
         var bitmap = [UInt8](repeating: 0, count: 4)
-        let context = CIContext(options: [.workingColorSpace: kCFNull!])
-        context.render(outputImage, toBitmap: &bitmap, rowBytes: 4, bounds: CGRect(x: 0, y: 0, width: 1, height: 1), format: .RGBA8, colorSpace: nil)
+        guard let null = kCFNull else {
+            return nil
+        }
+        let context = CIContext(options: [.workingColorSpace: null])
+        context.render(outputImage, toBitmap: &bitmap, rowBytes: 4,
+                       bounds: CGRect(x: 0, y: 0, width: 1, height: 1),
+                       format: .RGBA8, colorSpace: nil)
         
         let color = UIColor(
             red: saturate(bitmap[0]),