Fix canvas creation for true color image

onevcat · May 8, 2022 · cec727c · cec727c
1 parent f074bac
commit cec727c
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Showing 3 changed files with 20 additions and 2 deletions.
diff --git a/Demo/Demo.xcodeproj/project.xcworkspace/xcshareddata/swiftpm/Package.resolved b/Demo/Demo.xcodeproj/project.xcworkspace/xcshareddata/swiftpm/Package.resolved
@@ -0,0 +1,16 @@
+{
+  "object": {
+    "pins": [
+      {
+        "package": "Delegate",
+        "repositoryURL": "https://github.com/onevcat/Delegate.git",
+        "state": {
+          "branch": null,
+          "revision": "45c5ec58d5a9656a9cc729506e0ed3093ca8f772",
+          "version": "1.1.1"
+        }
+      }
+    ]
+  },
+  "version": 1
+}
diff --git a/Source/APNGKit/APNGImageRenderer.swift b/Source/APNGKit/APNGImageRenderer.swift
@@ -491,8 +491,10 @@ extension IHDR {
 
     var bitmapInfo: CGBitmapInfo {
         switch colorType {
-        case .greyscale, .trueColor:
+        case .greyscale:
             return CGBitmapInfo(rawValue: CGImageAlphaInfo.none.rawValue)
+        case .trueColor:
+            return CGBitmapInfo(rawValue: CGImageAlphaInfo.noneSkipLast.rawValue)
         case .greyscaleWithAlpha, .trueColorWithAlpha, .indexedColor:
             return CGBitmapInfo(rawValue: CGImageAlphaInfo.premultipliedLast.rawValue)
         }

diff --git a/Source/APNGKit/Chunk.swift b/Source/APNGKit/Chunk.swift
@@ -81,7 +81,7 @@ struct IHDR: Chunk {
         var componentsPerPixel: Int {
             switch self {
             case .greyscale: return 1
-            case .trueColor: return 3
+            case .trueColor: return 4
             case .indexedColor: return 1
             case .greyscaleWithAlpha: return 2
             case .trueColorWithAlpha: return 4