/*

 Copyright (C) 2014 Apple Inc. All Rights Reserved.

 See LICENSE.txt for this sample’s licensing information

 Abstract:

  Metal Renderer for Metal Basic 3D. Acts as the update and render delegate for the view controller and performs rendering. In MetalBasic3D, the renderer draws N cubes, whos color values change every update.

 */

#import "AAPLView.h"

#import "AAPLViewController.h"

#import <Metal/Metal.h>

@interface AAPLRenderer : NSObject <AAPLViewControllerDelegate, AAPLViewDelegate>

// renderer will create a default device at init time.

@property (nonatomic, readonly) id <MTLDevice> device;

// this value will cycle from 0 to g_max_inflight_buffers whenever a display completes ensuring renderer clients

// can synchronize between g_max_inflight_buffers count buffers, and thus avoiding a constant buffer from being overwritten between draws

@property (nonatomic, readonly) NSUInteger constantDataBufferIndex;

//  These queries exist so the View can initialize a framebuffer that matches the expectations of the renderer

@property (nonatomic, readonly) MTLPixelFormat depthPixelFormat;

@property (nonatomic, readonly) MTLPixelFormat stencilPixelFormat;

@property (nonatomic, readonly) NSUInteger sampleCount;

// load all assets before triggering rendering

- (void)configure:(AAPLView *)view;

- (void)cleanup;

@end