324 lines
13 KiB
C
324 lines
13 KiB
C
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#pragma once
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#include <stdint.h>
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#ifdef __OBJC__
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@class CAEAGLLayer;
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@class EAGLContext;
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#else
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typedef struct objc_object CAEAGLLayer;
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typedef struct objc_object EAGLContext;
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#endif
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#ifdef __OBJC__
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@class CAMetalLayer;
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@protocol CAMetalDrawable;
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@protocol MTLDrawable;
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@protocol MTLDevice;
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@protocol MTLTexture;
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@protocol MTLCommandBuffer;
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@protocol MTLCommandQueue;
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@protocol MTLCommandEncoder;
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typedef id<CAMetalDrawable> CAMetalDrawableRef;
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typedef id<MTLDevice> MTLDeviceRef;
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typedef id<MTLTexture> MTLTextureRef;
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typedef id<MTLCommandBuffer> MTLCommandBufferRef;
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typedef id<MTLCommandQueue> MTLCommandQueueRef;
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typedef id<MTLCommandEncoder> MTLCommandEncoderRef;
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#else
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typedef struct objc_object CAMetalLayer;
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typedef struct objc_object* CAMetalDrawableRef;
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typedef struct objc_object* MTLDeviceRef;
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typedef struct objc_object* MTLTextureRef;
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typedef struct objc_object* MTLCommandBufferRef;
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typedef struct objc_object* MTLCommandQueueRef;
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typedef struct objc_object* MTLCommandEncoderRef;
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#endif
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// unity internal native render buffer struct (the one you acquire in C# with RenderBuffer.GetNativeRenderBufferPtr())
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struct RenderSurfaceBase;
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typedef struct RenderSurfaceBase* UnityRenderBufferHandle;
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// be aware that this struct is shared with unity implementation so you should absolutely not change it
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typedef struct UnityRenderBufferDesc
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{
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unsigned width, height, depth;
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unsigned samples;
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int backbuffer;
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} UnityRenderBufferDesc;
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// trick to make structure inheritance work transparently between c/cpp
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// for c we use "anonymous struct"
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#ifdef __cplusplus
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#define START_STRUCT(T, Base) struct T : Base {
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#define END_STRUCT(T) };
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#else
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#define START_STRUCT(T, Base) typedef struct T { struct Base;
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#define END_STRUCT(T) } T;
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#endif
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// we will keep objc objects in struct, so we need to explicitely mark references as strong to not confuse ARC
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// please note that actual object lifetime is managed in objc++ code, so __unsafe_unretained is good enough for objc code
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// DO NOT assign objects to UnityDisplaySurface* members in objc code.
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// DO NOT store objects from UnityDisplaySurface* members in objc code, as this wont be caught by ARC
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#ifdef __OBJC__
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#ifdef __cplusplus
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#define OBJC_OBJECT_PTR __strong
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#else
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#define OBJC_OBJECT_PTR __unsafe_unretained
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#endif
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#else
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#define OBJC_OBJECT_PTR
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#endif
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// unity common rendering (display) surface
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typedef struct UnityDisplaySurfaceBase
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{
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UnityRenderBufferHandle unityColorBuffer;
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UnityRenderBufferHandle unityDepthBuffer;
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UnityRenderBufferHandle systemColorBuffer;
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UnityRenderBufferHandle systemDepthBuffer;
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void* cvTextureCache; // CVMetalTextureCacheRef
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void* cvTextureCacheTexture; // CVMetalTextureRef
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void* cvPixelBuffer; // CVPixelBufferRef
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unsigned targetW, targetH;
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unsigned systemW, systemH;
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int msaaSamples;
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int useCVTextureCache; // [bool]
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int srgb; // [bool]
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int wideColor; // [bool]
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int hdr; // [bool]
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int disableDepthAndStencil; // [bool]
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int allowScreenshot; // [bool] currently we allow screenshots (from script) only on main display
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int memorylessDepth; // [bool]
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int api; // [UnityRenderingAPI]
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} UnityDisplaySurfaceBase;
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// START_STRUCT confuse clang c compiler (though it is idiomatic c code that works)
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#pragma clang diagnostic push
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#pragma clang diagnostic ignored "-Wmissing-declarations"
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// on iOS/tvOS: we render to the drawable directly
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// and we need proxy only to delay acquiring drawable until we actually want to render to the "backbuffer"
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// thus just one proxy and it will be marked as "empty" (we only need it to query texture params, like extents)
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// on macOS: we render to the offscreen RT and blit to the drawable, thus we need several proxy RT
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// and all of them will be full blown textures (with GPU backing)
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#if PLATFORM_OSX
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#define kUnityNumOffscreenSurfaces 2
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#else
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#define kUnityNumOffscreenSurfaces 1
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#endif
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// Metal display surface
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START_STRUCT(UnityDisplaySurfaceMTL, UnityDisplaySurfaceBase)
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OBJC_OBJECT_PTR CAMetalLayer * layer;
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OBJC_OBJECT_PTR MTLDeviceRef device;
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OBJC_OBJECT_PTR MTLCommandQueueRef commandQueue;
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OBJC_OBJECT_PTR MTLCommandQueueRef drawableCommandQueue;
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OBJC_OBJECT_PTR MTLCommandBufferRef presentCB;
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OBJC_OBJECT_PTR CAMetalDrawableRef drawable;
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OBJC_OBJECT_PTR MTLTextureRef drawableProxyRT[kUnityNumOffscreenSurfaces];
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int drawableProxyNeedsClear[kUnityNumOffscreenSurfaces]; // [bool] Tracks whether the drawableProxy requires a clear after initial creation
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// This is used on a Mac with drawableProxyRT when off-screen rendering is used
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int proxySwaps; // Counts times proxy RTs have swapped since surface recreated
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int proxyReady; // [bool] Proxy RT has swapped since last present; frame ended
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OBJC_OBJECT_PTR MTLTextureRef systemColorRB;
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OBJC_OBJECT_PTR MTLTextureRef targetColorRT;
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OBJC_OBJECT_PTR MTLTextureRef targetAAColorRT;
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OBJC_OBJECT_PTR MTLTextureRef depthRB;
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OBJC_OBJECT_PTR MTLTextureRef stencilRB;
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unsigned colorFormat; // [MTLPixelFormat]
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unsigned depthFormat; // [MTLPixelFormat]
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int framebufferOnly;
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END_STRUCT(UnityDisplaySurfaceMTL)
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// START_STRUCT confuse clang c compiler (though it is idiomatic c code that works)
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#pragma clang diagnostic pop
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// be aware that this enum is shared with unity implementation so you should absolutely not change it
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typedef enum UnityRenderingAPI
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{
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apiMetal = 4,
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// command line argument: -nographics
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// does not initialize real graphics device and bypass all the rendering
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// currently supported only on simulators
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apiNoGraphics = -1,
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} UnityRenderingAPI;
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typedef struct RenderingSurfaceParams
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{
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// rendering setup
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int msaaSampleCount;
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int renderW;
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int renderH;
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int srgb;
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int wideColor;
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int hdr;
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int metalFramebufferOnly;
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int metalMemorylessDepth;
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// unity setup
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int disableDepthAndStencil;
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int useCVTextureCache;
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} RenderingSurfaceParams;
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#ifdef __cplusplus
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extern "C" {
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#endif
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int UnitySelectedRenderingAPI(void);
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#ifdef __cplusplus
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} // extern "C"
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#endif
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// metal
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#ifdef __cplusplus
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extern "C" {
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#endif
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void InitRenderingMTL(void);
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void CreateSystemRenderingSurfaceMTL(UnityDisplaySurfaceMTL* surface);
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void DestroySystemRenderingSurfaceMTL(UnityDisplaySurfaceMTL* surface);
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void CreateRenderingSurfaceMTL(UnityDisplaySurfaceMTL* surface);
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void DestroyRenderingSurfaceMTL(UnityDisplaySurfaceMTL* surface);
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void CreateSharedDepthbufferMTL(UnityDisplaySurfaceMTL* surface);
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void DestroySharedDepthbufferMTL(UnityDisplaySurfaceMTL* surface);
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void CreateUnityRenderBuffersMTL(UnityDisplaySurfaceMTL* surface);
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void DestroyUnityRenderBuffersMTL(UnityDisplaySurfaceMTL* surface);
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void StartFrameRenderingMTL(UnityDisplaySurfaceMTL* surface);
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void EndFrameRenderingMTL(UnityDisplaySurfaceMTL* surface);
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void PreparePresentMTL(UnityDisplaySurfaceMTL* surface);
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void PresentMTL(UnityDisplaySurfaceMTL* surface);
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// Acquires CAMetalDrawable resource for the surface and returns the drawable texture
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MTLTextureRef AcquireDrawableMTL(UnityDisplaySurfaceMTL* surface);
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unsigned UnityHDRSurfaceDepth(void);
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// starting with ios11 apple insists on having just one presentDrawable per command buffer
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// hence we keep normal processing for main screen, but when airplay is used we will create extra command buffers
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void PreparePresentNonMainScreenMTL(UnityDisplaySurfaceMTL* surface);
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void SetDrawableSizeMTL(UnityDisplaySurfaceMTL* surface, int width, int height);
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#ifdef __cplusplus
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} // extern "C"
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#endif
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// no graphics
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#ifdef __cplusplus
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extern "C" {
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#endif
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void InitRenderingNULL(void);
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void CreateSystemRenderingSurfaceNULL(UnityDisplaySurfaceBase* surface);
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void CreateRenderingSurfaceNULL(UnityDisplaySurfaceBase* surface);
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void DestroyRenderingSurfaceNULL(UnityDisplaySurfaceBase* surface);
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void CreateSharedDepthbufferNULL(UnityDisplaySurfaceBase* surface);
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void DestroySharedDepthbufferNULL(UnityDisplaySurfaceBase* surface);
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void CreateUnityRenderBuffersNULL(UnityDisplaySurfaceBase* surface);
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void DestroySystemRenderingSurfaceNULL(UnityDisplaySurfaceBase* surface);
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void DestroyUnityRenderBuffersNULL(UnityDisplaySurfaceBase* surface);
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void StartFrameRenderingNULL(UnityDisplaySurfaceBase* surface);
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void EndFrameRenderingNULL(UnityDisplaySurfaceBase* surface);
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void PreparePresentNULL(UnityDisplaySurfaceBase* surface);
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void PresentNULL(UnityDisplaySurfaceBase* surface);
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#ifdef __cplusplus
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} // extern "C"
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#endif
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#ifdef __cplusplus
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extern "C" {
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#endif
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// for Create* functions if surf is null we will actuially create new one, otherwise we update the one provided
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// metal: resolveTex should be non-nil only if tex have AA
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UnityRenderBufferHandle UnityCreateExternalSurfaceMTL(UnityRenderBufferHandle surf, int isColor, MTLTextureRef tex, const UnityRenderBufferDesc* desc);
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// Passing non-nil displaySurface will mark render surface as proxy and will do a delayed drawable acquisition when setting up framebuffer
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UnityRenderBufferHandle UnityCreateExternalColorSurfaceMTL(UnityRenderBufferHandle surf, MTLTextureRef tex, MTLTextureRef resolveTex, const UnityRenderBufferDesc* desc, UnityDisplaySurfaceMTL* displaySurface);
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UnityRenderBufferHandle UnityCreateExternalDepthSurfaceMTL(UnityRenderBufferHandle surf, MTLTextureRef tex, MTLTextureRef stencilTex, const UnityRenderBufferDesc* desc);
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// creates "dummy" surface - will indicate "missing" buffer (e.g. depth-only RT will have color as dummy)
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UnityRenderBufferHandle UnityCreateDummySurface(UnityRenderBufferHandle surf, int isColor, const UnityRenderBufferDesc* desc);
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// disable rendering to render buffers (all Cameras that were rendering to one of buffers would be reset to use backbuffer)
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void UnityDisableRenderBuffers(UnityRenderBufferHandle color, UnityRenderBufferHandle depth);
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// destroys render buffer
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void UnityDestroyExternalSurface(UnityRenderBufferHandle surf);
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// sets current render target
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void UnitySetRenderTarget(UnityRenderBufferHandle color, UnityRenderBufferHandle depth);
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// final blit to backbuffer
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void UnityBlitToBackbuffer(UnityRenderBufferHandle srcColor, UnityRenderBufferHandle dstColor, UnityRenderBufferHandle dstDepth);
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// get native renderbuffer from handle
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// sets vSync on OSX 10.13 and up
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#if PLATFORM_OSX
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void MetalUpdateDisplaySync(void);
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#endif
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UnityRenderBufferHandle UnityNativeRenderBufferFromHandle(void *rb);
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MTLCommandBufferRef UnityCurrentMTLCommandBuffer(void);
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void UnityUpdateDrawableSize(UnityDisplaySurfaceMTL* surface);
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#ifdef __cplusplus
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} // extern "C"
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#endif
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// metal/gles unification
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#define GLES_METAL_COMMON_IMPL_SURF(f) \
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inline void f(UnityDisplaySurfaceBase* surface) \
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{ \
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switch(surface->api) { \
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case apiMetal: f ## MTL((UnityDisplaySurfaceMTL*)surface); break; \
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case apiNoGraphics: f ## NULL(surface); break; \
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} \
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} \
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#define GLES_METAL_COMMON_IMPL(f) \
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inline void f() \
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{ \
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switch(UnitySelectedRenderingAPI()) { \
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case apiMetal: f ## MTL(); break; \
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case apiNoGraphics: f ## NULL(); break; \
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} \
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} \
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GLES_METAL_COMMON_IMPL(InitRendering);
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GLES_METAL_COMMON_IMPL_SURF(CreateSystemRenderingSurface);
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GLES_METAL_COMMON_IMPL_SURF(DestroySystemRenderingSurface);
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GLES_METAL_COMMON_IMPL_SURF(CreateRenderingSurface);
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GLES_METAL_COMMON_IMPL_SURF(DestroyRenderingSurface);
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GLES_METAL_COMMON_IMPL_SURF(CreateSharedDepthbuffer);
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GLES_METAL_COMMON_IMPL_SURF(DestroySharedDepthbuffer);
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GLES_METAL_COMMON_IMPL_SURF(CreateUnityRenderBuffers);
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GLES_METAL_COMMON_IMPL_SURF(DestroyUnityRenderBuffers);
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GLES_METAL_COMMON_IMPL_SURF(StartFrameRendering);
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GLES_METAL_COMMON_IMPL_SURF(EndFrameRendering);
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GLES_METAL_COMMON_IMPL_SURF(PreparePresent);
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GLES_METAL_COMMON_IMPL_SURF(Present);
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#undef GLES_METAL_COMMON_IMPL_SURF
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#undef GLES_METAL_COMMON_IMPL
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