46 lines
1.4 KiB
C
46 lines
1.4 KiB
C
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// SkiaRenderer.h
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// VisionCamera
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//
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// Created by Marc Rousavy on 19.07.23.
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// Copyright © 2023 mrousavy. All rights reserved.
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//
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#pragma once
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#import <Foundation/Foundation.h>
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#import <AVFoundation/AVFoundation.h>
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#import <Metal/Metal.h>
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typedef void* SkiaCanvas;
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typedef void(^draw_callback_t)(SkiaCanvas _Nonnull);
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/**
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A Camera Frame Renderer powered by Skia.
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It provides two Contexts, one offscreen and one onscreen.
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- Offscreen Context: Allows you to render a Frame into a Skia Canvas and draw onto it using Skia commands
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- Onscreen Context: Allows you to render a Frame from the offscreen context onto a Layer allowing it to be displayed for Preview.
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The two contexts may run at different Frame Rates.
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*/
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@interface SkiaRenderer : NSObject
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/**
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Renders the given Camera Frame to the offscreen Skia Canvas.
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The given callback will be executed with a reference to the Skia Canvas
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for the user to perform draw operations on (in this case, through a JS Frame Processor)
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*/
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- (void)renderCameraFrameToOffscreenCanvas:(CMSampleBufferRef _Nonnull)sampleBuffer withDrawCallback:(draw_callback_t _Nonnull)callback;
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/**
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Renders the latest Frame to the onscreen Layer.
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This should be called everytime you want the UI to update, e.g. for 60 FPS; every 16.66ms.
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*/
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- (void)renderLatestFrameToLayer:(CALayer* _Nonnull)layer;
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/**
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The Metal Device used for Rendering to the Layer
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*/
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@property (nonatomic, readonly) id<MTLDevice> _Nonnull metalDevice;
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@end
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