Adopt the current requirement, change ImageIO coder's canDeocdeFromHEIC to actual implementation

@@ -17,8 +17,11 @@
  For a full GIF support, we recommend `FLAnimatedImage` or our less performant `SDWebImageGIFCoder`
  
  HEIC
- This coder also supports HEIC format because ImageIO supports it natively. But it depends on the system capabilities, so it won't work on all devices.
- Hardware works if:  (iOS 11 || macOS 10.13) && (isMac || isIPhoneAndA10FusionChipAbove) && (!Simulator)
+ This coder also supports HEIC format because ImageIO supports it natively. But it depends on the system capabilities, so it won't work on all devices, see: https://devstreaming-cdn.apple.com/videos/wwdc/2017/511tj33587vdhds/511/511_working_with_heif_and_hevc.pdf
+ Decode(Software): !Simulator && (iOS 11 || tvOS 11 || macOS 10.13)
+ Decode(Hardware): !Simulator && ((iOS 11 && A9Chip) || (macOS 10.13 && 6thGenerationIntelCPU))
+ Encode(Software): macOS 10.13
+ Encode(Hardware): !Simulator && ((iOS 11 && A10FusionChip) || (macOS 10.13 && 6thGenerationIntelCPU))
  */
 @interface SDWebImageImageIOCoder : NSObject <SDWebImageProgressiveCoder>
 

@@ -70,6 +70,9 @@ static const CGFloat kDestSeemOverlap = 2.0f;   // the numbers of pixels to over
         case SDImageFormatWebP:
             // Do not support WebP decoding
             return NO;
+        case SDImageFormatHEIC:
+            // Check HEIC decoding compatibility
+            return [[self class] canDecodeFromHEICFormat];
         default:
             return YES;
     }
@@ -80,6 +83,9 @@ static const CGFloat kDestSeemOverlap = 2.0f;   // the numbers of pixels to over
         case SDImageFormatWebP:
             // Do not support WebP progressive decoding
             return NO;
+        case SDImageFormatHEIC:
+            // Check HEIC decoding compatibility
+            return [[self class] canDecodeFromHEICFormat];
         default:
             return YES;
     }
@@ -470,6 +476,33 @@ static const CGFloat kDestSeemOverlap = 2.0f;   // the numbers of pixels to over
     return YES;
 }
 
++ (BOOL)canDecodeFromHEICFormat {
+    static BOOL canDecode = NO;
+    static dispatch_once_t onceToken;
+    dispatch_once(&onceToken, ^{
+#if TARGET_OS_SIMULATOR || SD_WATCH
+        canDecode = NO;
+#elif SD_MAC
+        NSProcessInfo *processInfo = [NSProcessInfo processInfo];
+        if ([processInfo respondsToSelector:@selector(operatingSystemVersion)]) {
+            // macOS 10.13+
+            canDecode = processInfo.operatingSystemVersion.minorVersion >= 13;
+        } else {
+            canDecode = NO;
+        }
+#elif SD_UIKIT
+        NSProcessInfo *processInfo = [NSProcessInfo processInfo];
+        if ([processInfo respondsToSelector:@selector(operatingSystemVersion)]) {
+            // iOS 11+ && tvOS 11+
+            canDecode = processInfo.operatingSystemVersion.majorVersion >= 11;
+        } else {
+            canDecode = NO;
+        }
+#endif
+    });
+    return canDecode;
+}
+
 + (BOOL)canEncodeToHEICFormat {
     static BOOL canEncode = NO;
     static dispatch_once_t onceToken;