Metal tvOS 12.0 Beta 3 to Beta 4 API Differences

MTLArgument.h

Modified MTLArgument.bufferStructType

	Declaration
From	@property (readonly, nonnull) MTLStructType *bufferStructType
To	@property (readonly, nullable) MTLStructType *bufferStructType

MTLArgumentEncoder.h

Modified -[MTLArgumentEncoder setArgumentBuffer:offset:]

	Declaration
From	- (void)setArgumentBuffer:(nonnull id<MTLBuffer>)argumentBuffer offset:(NSUInteger)offset
To	- (void)setArgumentBuffer:(nullable id<MTLBuffer>)argumentBuffer offset:(NSUInteger)offset

MTLHeap.h

Modified -[MTLHeap newBufferWithLength:options:]

	Declaration
From	- (nonnull id<MTLBuffer>)newBufferWithLength:(NSUInteger)length options:(MTLResourceOptions)options
To	- (nullable id<MTLBuffer>)newBufferWithLength:(NSUInteger)length options:(MTLResourceOptions)options

Modified -[MTLHeap newTextureWithDescriptor:]

	Declaration
From	- (nonnull id<MTLTexture>)newTextureWithDescriptor:(nonnull MTLTextureDescriptor *)desc
To	- (nullable id<MTLTexture>)newTextureWithDescriptor:(nonnull MTLTextureDescriptor *)desc

MTLIndirectCommandBuffer.h

Modified -[MTLIndirectCommandBuffer indirectRenderCommandAtIndex:]

	Declaration
From	- (id<MTLIndirectRenderCommand>)indirectRenderCommandAtIndex:(NSUInteger)commandIndex
To	- (nonnull id<MTLIndirectRenderCommand>)indirectRenderCommandAtIndex:(NSUInteger)commandIndex

MTLLibrary.h

Modified MTLVertexAttribute.name

	Declaration
From	@property (readonly, nullable) NSString *name
To	@property (readonly, nonnull) NSString *name

Modified MTLAttribute.name

	Declaration
From	@property (readonly, nullable) NSString *name
To	@property (readonly, nonnull) NSString *name