[NoCopyRendering] In non-VM case, use calloc to get a zerod buffer. (T…

…extureGroup#869)
kakadee · Apr 4, 2018 · e90ba47 · e90ba47
1 parent e748d05
commit e90ba47
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Showing 2 changed files with 2 additions and 1 deletion.
diff --git a/Source/ASCGImageBuffer.h b/Source/ASCGImageBuffer.h
@@ -19,6 +19,7 @@ NS_ASSUME_NONNULL_BEGIN
 AS_SUBCLASSING_RESTRICTED
 @interface ASCGImageBuffer : NSObject
 
+/// Init a zero-filled buffer with the given length.
 - (instancetype)initWithLength:(NSUInteger)length;
 
 @property (readonly) void *mutableBytes NS_RETURNS_INNER_POINTER;

diff --git a/Source/ASCGImageBuffer.m b/Source/ASCGImageBuffer.m
@@ -47,7 +47,7 @@ - (instancetype)initWithLength:(NSUInteger)length
 
     // Check the VM flag again because we may have failed above.
     if (!_isVM) {
-      _mutableBytes = malloc(length);
+      _mutableBytes = calloc(1, length);
     }
   }
   return self;