metal_excluded.h

#if TARGET_OS_SIMULATOR

#import <Metal/Metal.h>
#import <CoreVideo/CoreVideo.h>

/// CAMetalLayer

@class CAMetalLayer;
@protocol CAMetalDrawable <MTLDrawable>
@property(readonly) id <MTLTexture> texture;
@property(readonly) CAMetalLayer *layer;
@end

@interface CAMetalLayer : CALayer
@property(nullable, retain) id <MTLDevice> device;
@property MTLPixelFormat pixelFormat;
@property BOOL framebufferOnly;
@property CGSize drawableSize;
@property NSUInteger maximumDrawableCount;
@property BOOL presentsWithTransaction;
@property BOOL allowsNextDrawableTimeout;
- (nullable id <CAMetalDrawable>)nextDrawable;
@end

/// CVImageBuffer

@protocol MTLTexture;
typedef CVImageBufferRef CVMetalTextureRef;

CV_EXPORT CFTypeID CVMetalTextureGetTypeID(void);
CV_EXPORT id <MTLTexture> CV_NULLABLE CVMetalTextureGetTexture( CVMetalTextureRef CV_NONNULL image );
CV_EXPORT Boolean CVMetalTextureIsFlipped( CVMetalTextureRef CV_NONNULL image );
CV_EXPORT void CVMetalTextureGetCleanTexCoords( CVMetalTextureRef CV_NONNULL image,
                                               float lowerLeft[2],
                                               float lowerRight[2],
                                               float upperRight[2],
                                               float upperLeft[2] );
CV_EXPORT const CFStringRef CV_NONNULL kCVMetalTextureUsage;

/// CVMetalTextureCache

CV_EXPORT const CFStringRef CV_NONNULL kCVMetalTextureCacheMaximumTextureAgeKey;

@protocol MTLDevice;
typedef struct CV_BRIDGED_TYPE(id) __CVMetalTextureCache *CVMetalTextureCacheRef;
CV_EXPORT CFTypeID CVMetalTextureCacheGetTypeID(void);
CV_EXPORT CVReturn CVMetalTextureCacheCreate(CFAllocatorRef CV_NULLABLE allocator,
                                             CFDictionaryRef CV_NULLABLE cacheAttributes,
                                             id <MTLDevice> CV_NONNULL metalDevice,
                                             CFDictionaryRef CV_NULLABLE textureAttributes,
                                             CV_RETURNS_RETAINED_PARAMETER CVMetalTextureCacheRef CV_NULLABLE * CV_NONNULL cacheOut );
CV_EXPORT CVReturn CVMetalTextureCacheCreateTextureFromImage(
                                                             CFAllocatorRef CV_NULLABLE allocator,
                                                             CVMetalTextureCacheRef CV_NONNULL textureCache,
                                                             CVImageBufferRef CV_NONNULL sourceImage,
                                                             CFDictionaryRef CV_NULLABLE textureAttributes,
                                                             MTLPixelFormat pixelFormat,
                                                             size_t width,
                                                             size_t height,
                                                             size_t planeIndex,
                                                             CV_RETURNS_RETAINED_PARAMETER CVMetalTextureRef CV_NULLABLE * CV_NONNULL textureOut );
CV_EXPORT void CVMetalTextureCacheFlush(CVMetalTextureCacheRef CV_NONNULL textureCache, CVOptionFlags options);

#endif