/*
     File: RosyWriterOpenGLRenderer.h
 Abstract: The RosyWriter OpenGL effect renderer
  Version: 2.1
 
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 */

#import <Foundation/Foundation.h>
#import <AVFoundation/AVFoundation.h>
#import "MGOpenGLConfig.h"

@class MGFaceModelArray;



@interface MGOpenGLRenderer : NSObject

/* Format/Processing Requirements */
@property(nonatomic, readonly) BOOL operatesInPlace; // When YES the input pixel buffer is written to by the renderer instead of writing the result to a new pixel buffer.
@property(nonatomic, readonly) FourCharCode inputPixelFormat; // One of 420f, 420v, or BGRA

/* Resource Lifecycle */
// Prepare and destroy expensive resources inside these callbacks.
// The outputRetainedBufferCountHint tells out of place renderers how many of their output buffers will be held onto by the downstream pipeline at one time.
// This can be used by the renderer to size and preallocate their pools.
- (void)prepareForInputWithFormatDescription:(CMFormatDescriptionRef)inputFormatDescription
               outputRetainedBufferCountHint:(size_t)outputRetainedBufferCountHint;

- (void)reset;

/* Rendering */
// Renderers which operate in place should return the input pixel buffer with a +1 retain count.
// Renderers which operate out of place should create a pixel buffer to return from a pool they own.
// When rendering to a pixel buffer with the GPU it is not necessary to block until rendering has completed before returning.
// It is sufficient to call glFlush() to ensure that the commands have been flushed to the GPU.
//- (CVPixelBufferRef )copyRenderedPixelBuffer:(CMSampleBufferRef)sampleBufferRef faceModelArray:(MGFaceModelArray *)modelArray drawLandmark:(BOOL)drawLandmark;

@property(nonatomic, assign) BOOL show3DView;

// This property must be implemented if operatesInPlace is NO and the output pixel buffers have a different format description than the input.
// If implemented a non-NULL value must be returned once the renderer has been prepared (can be NULL after being reset).
@property(nonatomic, readonly) CMFormatDescriptionRef __attribute__((NSObject)) outputFormatDescription;

- (void)setUpOutSampleBuffer:(CGSize)outSize devicePosition:(AVCaptureDevicePosition)devicePosition;


- (CVPixelBufferRef )drawPixelBuffer:(CMSampleBufferRef)sampleBufferRef custumDrawing:(void (^)(void))draw;

- (void)drawFaceLandMark:(MGFaceModelArray *)faces;

- (void)drawRect:(CGRect)rect;

- (void)drawFaceWithRect:(CGRect)rect;

@end