Cleanup.

src/renderer_mtl.h

@@ -23,7 +23,7 @@ namespace bgfx { namespace mtl
 		// objects with creation functions starting with 'new' has a refcount 1 after creation, object must be destroyed with release.
 		// commandBuffer, commandEncoders are autoreleased objects. Needs AutoreleasePool!
 
-#define MTL_CLASS(name)	\
+#define MTL_CLASS(name) \
 	class name \
 	{ \
 	public: \
@@ -37,8 +37,15 @@ namespace bgfx { namespace mtl
 
 		//TODO: ??MTLBlitCommandEncoder??
 	MTL_CLASS(Buffer)
-		void* contents() { return m_obj.contents; }
+		void* contents()
-		uint32_t length() { return (uint32_t)m_obj.length; }
+		{
+			return m_obj.contents;
+		}
+
+		uint32_t length()
+		{
+			return (uint32_t)m_obj.length;
+		}
 	MTL_CLASS_END
 
 	MTL_CLASS(CommandBuffer)
@@ -80,52 +87,104 @@ namespace bgfx { namespace mtl
 	MTL_CLASS_END
 
 	MTL_CLASS(CommandQueue)
-		id<MTLCommandBuffer> commandBuffer() { return [m_obj commandBuffer]; }
+		id<MTLCommandBuffer> commandBuffer()
-		id<MTLCommandBuffer> commandBufferWithUnretainedReferences() { return [m_obj commandBufferWithUnretainedReferences]; }
+		{
+			return [m_obj commandBuffer];
+		}
+
+		id<MTLCommandBuffer> commandBufferWithUnretainedReferences()
+		{
+			return [m_obj commandBufferWithUnretainedReferences];
+		}
 	MTL_CLASS_END
 
 	MTL_CLASS(ComputeCommandEncoder)
-		void setComputePipelineState(id<MTLComputePipelineState> _state) { [m_obj setComputePipelineState:_state]; }
+		void setComputePipelineState(id<MTLComputePipelineState> _state)
+		{
+			[m_obj setComputePipelineState:_state];
+		}
 
-		void setBuffer(id<MTLBuffer> _buffer, NSUInteger _offset, NSUInteger _index) { [m_obj setBuffer:_buffer offset:_offset atIndex:_index]; }
+		void setBuffer(id<MTLBuffer> _buffer, NSUInteger _offset, NSUInteger _index)
+		{
+			[m_obj setBuffer:_buffer offset:_offset atIndex:_index];
+		}
 
-		void setTexture(id<MTLTexture> _texture, NSUInteger _index) { [m_obj setTexture:_texture atIndex:_index]; }
+		void setTexture(id<MTLTexture> _texture, NSUInteger _index)
+		{
+			[m_obj setTexture:_texture atIndex:_index];
+		}
 
-		void setSamplerState(id<MTLSamplerState> _sampler, NSUInteger _index) { [m_obj setSamplerState:_sampler atIndex:_index]; }
+		void setSamplerState(id<MTLSamplerState> _sampler, NSUInteger _index)
+		{
+			[m_obj setSamplerState:_sampler atIndex:_index];
+		}
 
-		void endEncoding() {[m_obj endEncoding] ;}
+		void endEncoding()
+		{
+			[m_obj endEncoding];
+		}
 	MTL_CLASS_END
 
 	MTL_CLASS(Device)
-		bool supportsFeatureSet(MTLFeatureSet _featureSet) { return [m_obj supportsFeatureSet:_featureSet]; }
+		bool supportsFeatureSet(MTLFeatureSet _featureSet)
+		{
+			return [m_obj supportsFeatureSet:_featureSet];
+		}
 
-		id<MTLLibrary> newLibraryWithData(const void* _data) {
+		id<MTLLibrary> newLibraryWithData(const void* _data)
+		{
 			NSError* error;
 			id<MTLLibrary> lib =  [m_obj newLibraryWithData:(dispatch_data_t)_data error:&error];
 			BX_WARN(error==NULL,"newLibraryWithData failed:%s", [error.localizedDescription UTF8String] );
 			return lib;
 		}
-		id<MTLLibrary> newLibraryWithSource(const char* _source) {
+
+		id<MTLLibrary> newLibraryWithSource(const char* _source)
+		{
 			NSError* error;
 			id<MTLLibrary> lib = [m_obj newLibraryWithSource:@(_source) options:nil error:&error];
 			if (error!=nil) NSLog(@"Shader compilation failed:%@", error.localizedDescription);
 			//TODO: sometimes prints null as paremeter. string is too large
- 			BX_WARN(error==NULL,"Shader compilation failed:%s", [error.localizedDescription UTF8String]);
+			BX_WARN(error==NULL,"Shader compilation failed:%s", [error.localizedDescription UTF8String]);
 			return lib;
 		}
 
-		id<MTLCommandQueue> newCommandQueue() { return [m_obj newCommandQueue]; }
+		id<MTLCommandQueue> newCommandQueue()
-		id<MTLCommandQueue> newCommandQueueWithMaxCommandBufferCount(NSUInteger _maxCommandBufferCount) { return [m_obj newCommandQueueWithMaxCommandBufferCount:_maxCommandBufferCount]; }
+		{
+			return [m_obj newCommandQueue];
+		}
+
+		id<MTLCommandQueue> newCommandQueueWithMaxCommandBufferCount(NSUInteger _maxCommandBufferCount)
+		{
+			return [m_obj newCommandQueueWithMaxCommandBufferCount:_maxCommandBufferCount];
+		}
 
 		// Creating Resources
-		id<MTLBuffer> newBufferWithLength(unsigned int _length, MTLResourceOptions _options) { return [m_obj newBufferWithLength:_length options:_options ]; }
+		id<MTLBuffer> newBufferWithLength(unsigned int _length, MTLResourceOptions _options)
-		id<MTLBuffer> newBufferWithBytes(const void *_pointer, NSUInteger _length, MTLResourceOptions _options) { return [m_obj newBufferWithBytes:_pointer length:_length options:_options]; }
+		{
+			return [m_obj newBufferWithLength:_length options:_options ];
+		}
 
-		id<MTLTexture> newTextureWithDescriptor(MTLTextureDescriptor * _descriptor) { return [m_obj newTextureWithDescriptor:_descriptor]; }
+		id<MTLBuffer> newBufferWithBytes(const void *_pointer, NSUInteger _length, MTLResourceOptions _options)
-		id<MTLSamplerState> newSamplerStateWithDescriptor(MTLSamplerDescriptor * _descriptor) { return [m_obj newSamplerStateWithDescriptor:_descriptor]; }
+		{
+			return [m_obj newBufferWithBytes:_pointer length:_length options:_options];
+		}
+
+		id<MTLTexture> newTextureWithDescriptor(MTLTextureDescriptor * _descriptor)
+		{
+			return [m_obj newTextureWithDescriptor:_descriptor];
+		}
+
+		id<MTLSamplerState> newSamplerStateWithDescriptor(MTLSamplerDescriptor * _descriptor)
+		{
+			return [m_obj newSamplerStateWithDescriptor:_descriptor];
+		}
 
 		// Creating Command Objects Needed to Render Graphics
-		id<MTLDepthStencilState> newDepthStencilStateWithDescriptor(MTLDepthStencilDescriptor * _descriptor) { return [m_obj newDepthStencilStateWithDescriptor:_descriptor]; }
+		id<MTLDepthStencilState> newDepthStencilStateWithDescriptor(MTLDepthStencilDescriptor * _descriptor)
+		{
+			return [m_obj newDepthStencilStateWithDescriptor:_descriptor];
+		}
 
 		id <MTLRenderPipelineState> newRenderPipelineStateWithDescriptor(MTLRenderPipelineDescriptor *_descriptor)
 		{
@@ -164,27 +223,92 @@ namespace bgfx { namespace mtl
 
 	MTL_CLASS(RenderCommandEncoder)
 		// Setting Graphics Rendering State
-		void setBlendColor(float _red, float _green, float _blue, float _alpha) { [m_obj setBlendColorRed:_red green:_green blue:_blue alpha:_alpha]; }
+		void setBlendColor(float _red, float _green, float _blue, float _alpha)
-		void setCullMode(MTLCullMode _cullMode) { [m_obj setCullMode:_cullMode]; }
+		{
-		void setDepthBias(float _depthBias, float _slopeScale, float _clamp) { [m_obj setDepthBias:_depthBias slopeScale:_slopeScale clamp:_clamp]; }
+			[m_obj setBlendColorRed:_red green:_green blue:_blue alpha:_alpha];
-		void setDepthStencilState(id<MTLDepthStencilState> _depthStencilState) { [m_obj setDepthStencilState:_depthStencilState];}
+		}
-		void setFrontFacingWinding(MTLWinding _frontFacingWinding) { [m_obj setFrontFacingWinding:_frontFacingWinding]; }
+
-		void setRenderPipelineState(id<MTLRenderPipelineState> _pipelineState) { [m_obj setRenderPipelineState:_pipelineState]; }
+		void setCullMode(MTLCullMode _cullMode)
-		void setScissorRect(MTLScissorRect _rect) { [m_obj setScissorRect:_rect]; }
+		{
-		void setStencilReferenceValue(uint32_t _ref) { [m_obj setStencilReferenceValue:_ref]; }
+			[m_obj setCullMode:_cullMode];
-		void setTriangleFillMode(MTLTriangleFillMode _fillMode) { [m_obj setTriangleFillMode:_fillMode]; }
+		}
-		void setViewport(MTLViewport _viewport) { [m_obj setViewport:_viewport]; }
+
-		void setVisibilityResultMode(MTLVisibilityResultMode _mode, NSUInteger _offset) { [m_obj setVisibilityResultMode:_mode offset:_offset]; }
+		void setDepthBias(float _depthBias, float _slopeScale, float _clamp)
+		{
+			[m_obj setDepthBias:_depthBias slopeScale:_slopeScale clamp:_clamp];
+		}
+
+		void setDepthStencilState(id<MTLDepthStencilState> _depthStencilState)
+		{
+			[m_obj setDepthStencilState:_depthStencilState];
+		}
+
+		void setFrontFacingWinding(MTLWinding _frontFacingWinding)
+		{
+			[m_obj setFrontFacingWinding:_frontFacingWinding];
+		}
+
+		void setRenderPipelineState(id<MTLRenderPipelineState> _pipelineState)
+		{
+			[m_obj setRenderPipelineState:_pipelineState];
+		}
+
+		void setScissorRect(MTLScissorRect _rect)
+		{
+			[m_obj setScissorRect:_rect];
+		}
+
+		void setStencilReferenceValue(uint32_t _ref)
+		{
+			[m_obj setStencilReferenceValue:_ref];
+		}
+
+		void setTriangleFillMode(MTLTriangleFillMode _fillMode)
+		{
+			[m_obj setTriangleFillMode:_fillMode];
+		}
+
+		void setViewport(MTLViewport _viewport)
+		{
+			[m_obj setViewport:_viewport];
+		}
+
+		void setVisibilityResultMode(MTLVisibilityResultMode _mode, NSUInteger _offset)
+		{
+			[m_obj setVisibilityResultMode:_mode offset:_offset];
+		}
 
 		// Specifying Resources for a Vertex Function
-		void setVertexBuffer(id<MTLBuffer> _buffer, NSUInteger _offset, NSUInteger _index) { [m_obj setVertexBuffer:_buffer offset:_offset atIndex:_index]; }
+		void setVertexBuffer(id<MTLBuffer> _buffer, NSUInteger _offset, NSUInteger _index)
-		void setVertexSamplerState(id<MTLSamplerState> _sampler, NSUInteger _index) { [m_obj setVertexSamplerState:_sampler atIndex:_index]; }
+		{
-		void setVertexTexture(id<MTLTexture> _texture, NSUInteger _index) { [m_obj setVertexTexture:_texture atIndex:_index]; }
+			[m_obj setVertexBuffer:_buffer offset:_offset atIndex:_index];
+		}
+
+		void setVertexSamplerState(id<MTLSamplerState> _sampler, NSUInteger _index)
+		{
+			[m_obj setVertexSamplerState:_sampler atIndex:_index];
+		}
+
+		void setVertexTexture(id<MTLTexture> _texture, NSUInteger _index)
+		{
+			[m_obj setVertexTexture:_texture atIndex:_index];
+		}
 
 		// Specifying Resources for a Fragment Function
-		void setFragmentBuffer(id<MTLBuffer> _buffer, NSUInteger _offset, NSUInteger _index) { [m_obj setFragmentBuffer:_buffer offset:_offset atIndex:_index]; }
+		void setFragmentBuffer(id<MTLBuffer> _buffer, NSUInteger _offset, NSUInteger _index)
-		void setFragmentSamplerState(id<MTLSamplerState> _sampler, NSUInteger _index) { [m_obj setFragmentSamplerState:_sampler atIndex:_index]; }
+		{
-		void setFragmentTexture(id<MTLTexture> _texture, NSUInteger _index) { [m_obj setFragmentTexture:_texture atIndex:_index]; }
+			[m_obj setFragmentBuffer:_buffer offset:_offset atIndex:_index];
+		}
+
+		void setFragmentSamplerState(id<MTLSamplerState> _sampler, NSUInteger _index)
+		{
+			[m_obj setFragmentSamplerState:_sampler atIndex:_index];
+		}
+
+		void setFragmentTexture(id<MTLTexture> _texture, NSUInteger _index)
+		{
+			[m_obj setFragmentTexture:_texture atIndex:_index];
+		}
 
 		//Drawing Geometric Primitives
 		//NOTE: not exposing functions without instanceCount, it seems they are just wrappers
@@ -193,29 +317,66 @@ namespace bgfx { namespace mtl
 			[m_obj drawIndexedPrimitives:_primitiveType indexCount:_indexCount indexType:_indexType indexBuffer:_indexBuffer indexBufferOffset:_indexBufferOffset instanceCount:_instanceCount];
 		}
 
-		void drawPrimitives(MTLPrimitiveType _primitiveType, NSUInteger _vertexStart, NSUInteger _vertexCount, NSUInteger _instanceCount) {
+		void drawPrimitives(MTLPrimitiveType _primitiveType, NSUInteger _vertexStart, NSUInteger _vertexCount, NSUInteger _instanceCount)
-			[m_obj drawPrimitives:_primitiveType vertexStart:_vertexStart vertexCount:_vertexCount instanceCount:_instanceCount];}
+		{
+			[m_obj drawPrimitives:_primitiveType vertexStart:_vertexStart vertexCount:_vertexCount instanceCount:_instanceCount];
+		}
 
-		void insertDebugSignpost(const char* _string) { [m_obj insertDebugSignpost:@(_string)]; }
+		void insertDebugSignpost(const char* _string)
-		void pushDebugGroup(const char* _string) { [m_obj pushDebugGroup:@(_string)]; }
+		{
-		void popDebugGroup() { [m_obj popDebugGroup]; }
+			[m_obj insertDebugSignpost:@(_string)];
+		}
 
-		void endEncoding() { [m_obj endEncoding]; }
+		void pushDebugGroup(const char* _string)
+		{
+			[m_obj pushDebugGroup:@(_string)];
+		}
+
+		void popDebugGroup()
+		{
+			[m_obj popDebugGroup];
+		}
+
+		void endEncoding()
+		{
+			[m_obj endEncoding];
+		}
 	MTL_CLASS_END
 
 	MTL_CLASS(Texture)
 		// Copying Data into a Texture Image
-		void replaceRegion(MTLRegion _region, NSUInteger _level, NSUInteger _slice, const void *_pixelBytes, NSUInteger _bytesPerRow, NSUInteger _bytesPerImage) { [m_obj replaceRegion:_region mipmapLevel:_level slice:_slice withBytes:_pixelBytes bytesPerRow:_bytesPerRow		bytesPerImage:_bytesPerImage]; }
+		void replaceRegion(MTLRegion _region, NSUInteger _level, NSUInteger _slice, const void *_pixelBytes, NSUInteger _bytesPerRow, NSUInteger _bytesPerImage)
+		{
+			[m_obj replaceRegion:_region mipmapLevel:_level slice:_slice withBytes:_pixelBytes bytesPerRow:_bytesPerRow bytesPerImage:_bytesPerImage];
+		}
 
 		// Copying Data from a Texture Image
-		void getBytes(void *_pixelBytes, NSUInteger _bytesPerRow, NSUInteger _bytesPerImage, MTLRegion _region, NSUInteger _mipmapLevel, NSUInteger _slice) { [m_obj getBytes:_pixelBytes bytesPerRow:_bytesPerRow bytesPerImage:_bytesPerImage fromRegion:_region mipmapLevel:_mipmapLevel slice:_slice]; }
+		void getBytes(void *_pixelBytes, NSUInteger _bytesPerRow, NSUInteger _bytesPerImage, MTLRegion _region, NSUInteger _mipmapLevel, NSUInteger _slice)
+		{
+			[m_obj getBytes:_pixelBytes bytesPerRow:_bytesPerRow bytesPerImage:_bytesPerImage fromRegion:_region mipmapLevel:_mipmapLevel slice:_slice];
+		}
 
 		// Creating Textures by Reusing Image Data
-		id<MTLTexture> newTextureViewWithPixelFormat(MTLPixelFormat _pixelFormat) { return [m_obj newTextureViewWithPixelFormat:_pixelFormat]; }
+		id<MTLTexture> newTextureViewWithPixelFormat(MTLPixelFormat _pixelFormat)
+		{
+			return [m_obj newTextureViewWithPixelFormat:_pixelFormat];
+		}
+
 		//properties
-		uint32_t width() { return (uint32_t)m_obj.width; }
+		uint32_t width()
-		uint32_t height() { return (uint32_t)m_obj.height; }
+		{
-		MTLPixelFormat pixelFormat() const { return m_obj.pixelFormat; }
+			return (uint32_t)m_obj.width;
+		}
+
+		uint32_t height()
+		{
+			return (uint32_t)m_obj.height;
+		}
+
+		MTLPixelFormat pixelFormat() const
+		{
+			return m_obj.pixelFormat;
+		}
 	MTL_CLASS_END
 
 	typedef id<MTLComputePipelineState> ComputePipelineState;
@@ -226,47 +387,90 @@ namespace bgfx { namespace mtl
 		//descriptors
 	//NOTE: [class new] is same as [[class alloc] init]
 	typedef MTLRenderPipelineDescriptor* RenderPipelineDescriptor;
-	RenderPipelineDescriptor newRenderPipelineDescriptor() { return [MTLRenderPipelineDescriptor new]; }
+	RenderPipelineDescriptor newRenderPipelineDescriptor()
-	void reset(RenderPipelineDescriptor _desc) { [_desc reset]; };
+	{
+		return [MTLRenderPipelineDescriptor new];
+	}
+
+	void reset(RenderPipelineDescriptor _desc)
+	{
+		[_desc reset];
+	}
 
 	typedef MTLRenderPipelineColorAttachmentDescriptor* RenderPipelineColorAttachmentDescriptor;
 
 	typedef MTLDepthStencilDescriptor* DepthStencilDescriptor;
-	MTLDepthStencilDescriptor* newDepthStencilDescriptor() { return [MTLDepthStencilDescriptor new]; }
+	MTLDepthStencilDescriptor* newDepthStencilDescriptor()
+	{
+		return [MTLDepthStencilDescriptor new];
+	}
 
 	typedef MTLStencilDescriptor* StencilDescriptor;
-	MTLStencilDescriptor* newStencilDescriptor() { return [MTLStencilDescriptor new]; }
+	MTLStencilDescriptor* newStencilDescriptor()
+	{
+		return [MTLStencilDescriptor new];
+	}
 
 	typedef MTLRenderPassColorAttachmentDescriptor* RenderPassColorAttachmentDescriptor;
 	typedef MTLRenderPassDepthAttachmentDescriptor* RenderPassDepthAttachmentDescriptor;
 	typedef MTLRenderPassStencilAttachmentDescriptor* RenderPassStencilAttachmentDescriptor;
 
 	typedef MTLRenderPassDescriptor* RenderPassDescriptor;
-	MTLRenderPassDescriptor* newRenderPassDescriptor() { return [MTLRenderPassDescriptor new]; }
+	MTLRenderPassDescriptor* newRenderPassDescriptor()
+	{
+		return [MTLRenderPassDescriptor new];
+	}
 
 	typedef MTLVertexDescriptor* VertexDescriptor;
-	MTLVertexDescriptor* newVertexDescriptor() { return [MTLVertexDescriptor new]; }
+	MTLVertexDescriptor* newVertexDescriptor()
-	void reset(VertexDescriptor _desc) { [_desc reset]; };
+	{
+		return [MTLVertexDescriptor new];
+	}
+
+	void reset(VertexDescriptor _desc)
+	{
+		[_desc reset];
+	}
 
 	typedef MTLSamplerDescriptor* SamplerDescriptor;
-	MTLSamplerDescriptor* newSamplerDescriptor() { return [MTLSamplerDescriptor new]; }
+	MTLSamplerDescriptor* newSamplerDescriptor()
+	{
+		return [MTLSamplerDescriptor new];
+	}
 
 	typedef MTLTextureDescriptor* TextureDescriptor;
-	MTLTextureDescriptor* newTextureDescriptor() { return [MTLTextureDescriptor new]; }
+	MTLTextureDescriptor* newTextureDescriptor()
+	{
+		return [MTLTextureDescriptor new];
+	}
 
 	typedef MTLRenderPipelineReflection* RenderPipelineReflection;
 
-		//helper functions
+	//helper functions
-	void release(NSObject* _obj) { [_obj release]; }
+	void release(NSObject* _obj)
-	void retain(NSObject* _obj) { [_obj retain]; }
+	{
-	const char* utf8String(NSString* _str) { return [_str UTF8String]; }
+		[_obj release];
+	}
+
+	void retain(NSObject* _obj)
+	{
+		[_obj retain];
+	}
+
+	const char* utf8String(NSString* _str)
+	{
+		return [_str UTF8String];
+	}
 
 #define MTL_RELEASE(_obj)	\
 	[_obj release]; \
 	_obj = nil;
 
 #if BX_PLATFORM_IOS
-	bool OsVersionEqualOrGreater(const char* _version) { return ([[[UIDevice currentDevice] systemVersion] compare:@(_version) options:NSNumericSearch] != NSOrderedAscending); }
+	bool OsVersionEqualOrGreater(const char* _version)
+	{
+		return ([[[UIDevice currentDevice] systemVersion] compare:@(_version) options:NSNumericSearch] != NSOrderedAscending);
+	}
 	//TODO: this could be in bx ?
 #endif //
 
@@ -481,9 +685,8 @@ namespace bgfx { namespace mtl
 		uint8_t m_num; // number of color handles
 	};
 
-
-#endif
-
 } /* namespace metal */ } // namespace bgfx
 
+#endif // BGFX_CONFIG_RENDERER_METAL
+
 #endif // BGFX_RENDERER_METAL_H_HEADER_GUARD

src/renderer_mtl.mm

@@ -348,7 +348,8 @@ namespace bgfx { namespace mtl
 				//on iOS we need the layer as CAmetalLayer
 #if BX_PLATFORM_IOS
 				CAMetalLayer* metalLayer = (CAMetalLayer*)g_platformData.nwh;
-				if (metalLayer == nil || ![metalLayer isKindOfClass:NSClassFromString(@"CAMetalLayer")])
+				if (NULL == metalLayer
+				|| ![metalLayer isKindOfClass:NSClassFromString(@"CAMetalLayer")])
 				{
 					BX_WARN(NULL != m_device, "Unable to create Metal device. Please set platform data window to a CAMetalLayer");
 					return false;
@@ -378,7 +379,8 @@ namespace bgfx { namespace mtl
 				return false;
 			}
 
-			m_metalLayer.device = m_device;
+			m_metalLayer.device      = m_device;
+			m_metalLayer.pixelFormat = MTLPixelFormatBGRA8Unorm;
 
 			m_commandQueue = m_device.newCommandQueue();
 			BGFX_FATAL(NULL != m_commandQueue, Fatal::UnableToInitialize, "Unable to create Metal device.");
@@ -410,7 +412,7 @@ namespace bgfx { namespace mtl
 								 );
 
 			g_caps.maxTextureSize = 2048; //ASK: real caps width/height: 4096, but max depth(3D) size is only: 2048
-				//TODO: OSX
+			//TODO: OSX
 #if BX_PLATFORM_IOS
 			g_caps.maxFBAttachments = uint8_t(bx::uint32_min(m_device.supportsFeatureSet(MTLFeatureSet_iOS_GPUFamily2_v1) ? 8 :4, BGFX_CONFIG_MAX_FRAME_BUFFER_ATTACHMENTS));
 #endif // BX_PLATFORM_*
@@ -448,7 +450,6 @@ namespace bgfx { namespace mtl
 				bx::snprintf(s_viewName[ii], BGFX_CONFIG_MAX_VIEW_NAME_RESERVED+1, "%3d   ", ii);
 			}
 
-			BX_TRACE("x");
 			return true;
 		}
 
@@ -675,8 +676,11 @@ namespace bgfx { namespace mtl
 
 	void saveScreenShot(const char* _filePath) BX_OVERRIDE
 	{
-		if ( NULL == m_drawable || NULL == m_drawable.texture)
+		if (NULL == m_drawable
+		||  NULL == m_drawable.texture)
+		{
 			return;
+		}
 
 		//TODO: we should wait for completion of pending commandBuffers
 		//TODO: implement this with saveScreenshotBegin/End
@@ -804,8 +808,11 @@ namespace bgfx { namespace mtl
 
 	void flip(HMD& /*_hmd*/) BX_OVERRIDE
 	{
-		if ( m_drawable == nil || m_commandBuffer == nil) //there was no draw call, cannot flip
+		if (NULL == m_drawable
+		||  NULL == m_commandBuffer)
+		{
 			return;
+		}
 
 		// Present and commit the command buffer
 		m_commandBuffer.presentDrawable(m_drawable);