Added RCDrawer

Sources/Internal/RCDrawer.swift

@@ -0,0 +1,99 @@
+//  MIT License
+
+//  Copyright (c) 2020 Haik Aslanyan
+
+//  Permission is hereby granted, free of charge, to any person obtaining a copy
+//  of this software and associated documentation files (the "Software"), to deal
+//  in the Software without restriction, including without limitation the rights
+//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+//  copies of the Software, and to permit persons to whom the Software is
+//  furnished to do so, subject to the following conditions:
+
+//  The above copyright notice and this permission notice shall be included in all
+//  copies or substantial portions of the Software.
+
+//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+//  SOFTWARE.
+
+import UIKit
+
+class RCDrawer {
+  
+  let image: RCImage
+  
+  init(image: RCImage) {
+    self.image = image
+  }
+  
+  func draw() -> UIImage {
+    let rect = CGRect(origin: .zero, size: CGSize(width: image.size, height: image.size))
+    let renderer = UIGraphicsImageRenderer(bounds: rect, format: .default())
+    let image = renderer.image { context in
+      let cgContext = context.cgContext
+      if !self.image.isTransparent {
+        UIColor.white.setFill()
+        context.fill(rect)
+      }
+      self.image.tintColor.setFill()
+      let size = self.image.size - self.image.size * 0.15
+      let halfSize = size / 2
+      [(halfSize, 0), (size, halfSize), (halfSize, size), (0, halfSize)].map({CGPoint(x: $0.0, y: $0.1)}).forEach { point in
+        cgContext.saveGState()
+        cgContext.translateBy(x: point.x, y: point.y)
+        drawDot()
+        cgContext.restoreGState()
+      }
+      cgContext.saveGState()
+      cgContext.translateBy(x: rect.size.height / 4, y:  rect.size.height / 4)
+      cgContext.scaleBy(x: 0.5, y: 0.5)
+      drawImage()
+      cgContext.restoreGState()
+      for value in self.image.bits.enumerated() {
+        cgContext.saveGState()
+        cgContext.translateBy(x: self.image.size / 2, y: self.image.size / 2)
+        cgContext.rotate(by: CGFloat(value.offset) * CGFloat.pi / 2)
+        drawMessage(row: value.element)
+        cgContext.restoreGState()
+      }
+    }
+    return image
+  }
+}
+
+private extension RCDrawer {
+  func drawDot() {
+    let dot = UIBezierPath()
+    let patternSingleSize = image.size * 0.15 / 6.5
+    let patternSizes = [6.5, 4.5, 2.5].map({$0 * patternSingleSize})
+    for value in patternSizes.enumerated() {
+      let path = UIBezierPath(ovalIn: CGRect(x: (patternSizes[0] - value.element) / 2, y: (patternSizes[0] - value.element) / 2, width: value.element, height: value.element))
+      path.close()
+      value.element != patternSizes.last! ? dot.append(path) : path.fill()
+    }
+    dot.usesEvenOddFillRule = true
+    dot.fill()
+  }
+  
+  func drawImage() {
+    guard let image = self.image.attachmentImage else { return }
+    let rect = CGRect(origin: .zero, size: CGSize(width: self.image.size, height: self.image.size))
+    let path = UIBezierPath(ovalIn: rect)
+    path.addClip()
+    let aspectRatio = max(self.image.size / image.size.width, self.image.size / image.size.height)
+    let scaledImageRect = CGRect(
+      x: (self.image.size - image.size.width * aspectRatio) / 2,
+      y: (self.image.size - image.size.height * aspectRatio) / 2,
+      width: image.size.width * aspectRatio,
+      height: image.size.height * aspectRatio)
+    image.draw(in: scaledImageRect, blendMode: .normal, alpha: 1)
+  }
+  
+  func drawMessage() {
+    
+  }
+}