#pragma once

#include "IUnityInterface.h"

#ifndef __OBJC__

#error metal plugin is objc code.

#endif

#ifndef __clang__

#error only clang compiler is supported.

#endif

@class NSBundle;

@protocol MTLDevice;

@protocol MTLCommandBuffer;

@protocol MTLCommandEncoder;

@protocol MTLTexture;

UNITY_DECLARE_INTERFACE(IUnityGraphicsMetal)

{

NSBundle* (UNITY_INTERFACE_API * MetalBundle)();

id<MTLDevice>(UNITY_INTERFACE_API * MetalDevice)();

id<MTLCommandBuffer>(UNITY_INTERFACE_API * CurrentCommandBuffer)();

// for custom rendering support there are two scenarios:

// you want to use current in-flight MTLCommandEncoder (NB: it might be nil)

id<MTLCommandEncoder>(UNITY_INTERFACE_API * CurrentCommandEncoder)();

// or you might want to create your own encoder.

// In that case you should end unity's encoder before creating your own and end yours before returning control to unity

void(UNITY_INTERFACE_API * EndCurrentCommandEncoder)();

// converting trampoline UnityRenderBufferHandle into native RenderBuffer

UnityRenderBuffer(UNITY_INTERFACE_API * RenderBufferFromHandle)(void* bufferHandle);

// access to RenderBuffer's texure

// NB: you pass here *native* RenderBuffer, acquired by calling (C#) RenderBuffer.GetNativeRenderBufferPtr

// AAResolvedTextureFromRenderBuffer will return nil in case of non-AA RenderBuffer or if called for depth RenderBuffer

// StencilTextureFromRenderBuffer will return nil in case of no-stencil RenderBuffer or if called for color RenderBuffer

id<MTLTexture>(UNITY_INTERFACE_API * TextureFromRenderBuffer)(UnityRenderBuffer buffer);

id<MTLTexture>(UNITY_INTERFACE_API * AAResolvedTextureFromRenderBuffer)(UnityRenderBuffer buffer);

id<MTLTexture>(UNITY_INTERFACE_API * StencilTextureFromRenderBuffer)(UnityRenderBuffer buffer);

};

UNITY_REGISTER_INTERFACE_GUID(0x992C8EAEA95811E5ULL, 0x9A62C4B5B9876117ULL, IUnityGraphicsMetal)