nuclear@0: //
nuclear@0: //  EAGLView.m
nuclear@0: //  istereo
nuclear@0: //
nuclear@0: //  Created by nuclear on 9/6/11.
nuclear@0: //  Copyright __MyCompanyName__ 2011. All rights reserved.
nuclear@0: //
nuclear@0: 
nuclear@0: #import "EAGLView.h"
nuclear@0: 
nuclear@0: #import "ES1Renderer.h"
nuclear@0: #import "ES2Renderer.h"
nuclear@0: 
nuclear@0: @implementation EAGLView
nuclear@0: 
nuclear@0: @synthesize animating;
nuclear@0: @dynamic animationFrameInterval;
nuclear@0: 
nuclear@0: // You must implement this method
nuclear@0: + (Class)layerClass
nuclear@0: {
nuclear@0:     return [CAEAGLLayer class];
nuclear@0: }
nuclear@0: 
nuclear@0: //The EAGL view is stored in the nib file. When it's unarchived it's sent -initWithCoder:
nuclear@0: - (id)initWithCoder:(NSCoder*)coder
nuclear@0: {    
nuclear@0:     if ((self = [super initWithCoder:coder]))
nuclear@0:     {
nuclear@0:         // Get the layer
nuclear@0:         CAEAGLLayer *eaglLayer = (CAEAGLLayer *)self.layer;
nuclear@0: 
nuclear@0:         eaglLayer.opaque = TRUE;
nuclear@0:         eaglLayer.drawableProperties = [NSDictionary dictionaryWithObjectsAndKeys:
nuclear@0:                                         [NSNumber numberWithBool:FALSE], kEAGLDrawablePropertyRetainedBacking, kEAGLColorFormatRGBA8, kEAGLDrawablePropertyColorFormat, nil];
nuclear@0: 
nuclear@0:         renderer = [[ES2Renderer alloc] init];
nuclear@0: 
nuclear@0:         if (!renderer)
nuclear@0:         {
nuclear@0:             renderer = [[ES1Renderer alloc] init];
nuclear@0: 
nuclear@0:             if (!renderer)
nuclear@0:             {
nuclear@0:                 [self release];
nuclear@0:                 return nil;
nuclear@0:             }
nuclear@0:         }
nuclear@0: 
nuclear@0:         animating = FALSE;
nuclear@0:         displayLinkSupported = FALSE;
nuclear@0:         animationFrameInterval = 1;
nuclear@0:         displayLink = nil;
nuclear@0:         animationTimer = nil;
nuclear@0: 
nuclear@0:         // A system version of 3.1 or greater is required to use CADisplayLink. The NSTimer
nuclear@0:         // class is used as fallback when it isn't available.
nuclear@0:         NSString *reqSysVer = @"3.1";
nuclear@0:         NSString *currSysVer = [[UIDevice currentDevice] systemVersion];
nuclear@0:         if ([currSysVer compare:reqSysVer options:NSNumericSearch] != NSOrderedAscending)
nuclear@0:             displayLinkSupported = TRUE;
nuclear@0:     }
nuclear@0: 
nuclear@0:     return self;
nuclear@0: }
nuclear@0: 
nuclear@0: - (void)drawView:(id)sender
nuclear@0: {
nuclear@0:     [renderer render];
nuclear@0: }
nuclear@0: 
nuclear@0: - (void)layoutSubviews
nuclear@0: {
nuclear@0:     [renderer resizeFromLayer:(CAEAGLLayer*)self.layer];
nuclear@0:     [self drawView:nil];
nuclear@0: }
nuclear@0: 
nuclear@0: - (NSInteger)animationFrameInterval
nuclear@0: {
nuclear@0:     return animationFrameInterval;
nuclear@0: }
nuclear@0: 
nuclear@0: - (void)setAnimationFrameInterval:(NSInteger)frameInterval
nuclear@0: {
nuclear@0:     // Frame interval defines how many display frames must pass between each time the
nuclear@0:     // display link fires. The display link will only fire 30 times a second when the
nuclear@0:     // frame internal is two on a display that refreshes 60 times a second. The default
nuclear@0:     // frame interval setting of one will fire 60 times a second when the display refreshes
nuclear@0:     // at 60 times a second. A frame interval setting of less than one results in undefined
nuclear@0:     // behavior.
nuclear@0:     if (frameInterval >= 1)
nuclear@0:     {
nuclear@0:         animationFrameInterval = frameInterval;
nuclear@0: 
nuclear@0:         if (animating)
nuclear@0:         {
nuclear@0:             [self stopAnimation];
nuclear@0:             [self startAnimation];
nuclear@0:         }
nuclear@0:     }
nuclear@0: }
nuclear@0: 
nuclear@0: - (void)startAnimation
nuclear@0: {
nuclear@0:     if (!animating)
nuclear@0:     {
nuclear@0:         if (displayLinkSupported)
nuclear@0:         {
nuclear@0:             // CADisplayLink is API new to iPhone SDK 3.1. Compiling against earlier versions will result in a warning, but can be dismissed
nuclear@0:             // if the system version runtime check for CADisplayLink exists in -initWithCoder:. The runtime check ensures this code will
nuclear@0:             // not be called in system versions earlier than 3.1.
nuclear@0: 
nuclear@0:             displayLink = [NSClassFromString(@"CADisplayLink") displayLinkWithTarget:self selector:@selector(drawView:)];
nuclear@0:             [displayLink setFrameInterval:animationFrameInterval];
nuclear@0:             [displayLink addToRunLoop:[NSRunLoop currentRunLoop] forMode:NSDefaultRunLoopMode];
nuclear@0:         }
nuclear@0:         else
nuclear@0:             animationTimer = [NSTimer scheduledTimerWithTimeInterval:(NSTimeInterval)((1.0 / 60.0) * animationFrameInterval) target:self selector:@selector(drawView:) userInfo:nil repeats:TRUE];
nuclear@0: 
nuclear@0:         animating = TRUE;
nuclear@0:     }
nuclear@0: }
nuclear@0: 
nuclear@0: - (void)stopAnimation
nuclear@0: {
nuclear@0:     if (animating)
nuclear@0:     {
nuclear@0:         if (displayLinkSupported)
nuclear@0:         {
nuclear@0:             [displayLink invalidate];
nuclear@0:             displayLink = nil;
nuclear@0:         }
nuclear@0:         else
nuclear@0:         {
nuclear@0:             [animationTimer invalidate];
nuclear@0:             animationTimer = nil;
nuclear@0:         }
nuclear@0: 
nuclear@0:         animating = FALSE;
nuclear@0:     }
nuclear@0: }
nuclear@0: 
nuclear@0: - (void)dealloc
nuclear@0: {
nuclear@0:     [renderer release];
nuclear@0: 
nuclear@0:     [super dealloc];
nuclear@0: }
nuclear@0: 
nuclear@0: @end