Sources/Main/Classes/OpenGLController.m
//--------------------------------------------------------------------------- |
// |
// File: OpenGLController.m |
// |
// Abstract: Controller for passing data to the filter and updating |
// the OpenGL view with the results of the computation |
// |
// Disclaimer: IMPORTANT: This Apple software is supplied to you by Apple |
// Computer, Inc. ("Apple") in consideration of your agreement to the |
// following terms, and your use, installation, modification or |
// redistribution of this Apple software constitutes acceptance of these |
// terms. If you do not agree with these terms, please do not use, |
// install, modify or redistribute this Apple software. |
// |
// In consideration of your agreement to abide by the following terms, and |
// subject to these terms, Apple grants you a personal, non-exclusive |
// license, under Apple's copyrights in this original Apple software (the |
// "Apple Software"), to use, reproduce, modify and redistribute the Apple |
// Software, with or without modifications, in source and/or binary forms; |
// provided that if you redistribute the Apple Software in its entirety and |
// without modifications, you must retain this notice and the following |
// text and disclaimers in all such redistributions of the Apple Software. |
// Neither the name, trademarks, service marks or logos of Apple Computer, |
// Inc. may be used to endorse or promote products derived from the Apple |
// Software without specific prior written permission from Apple. Except |
// as expressly stated in this notice, no other rights or licenses, express |
// or implied, are granted by Apple herein, including but not limited to |
// any patent rights that may be infringed by your derivative works or by |
// other works in which the Apple Software may be incorporated. |
// |
// The Apple Software is provided by Apple on an "AS IS" basis. APPLE |
// MAKES NO WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION |
// THE IMPLIED WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY AND FITNESS |
// FOR A PARTICULAR PURPOSE, REGARDING THE APPLE SOFTWARE OR ITS USE AND |
// OPERATION ALONE OR IN COMBINATION WITH YOUR PRODUCTS. |
// |
// IN NO EVENT SHALL APPLE BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL |
// OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
// INTERRUPTION) ARISING IN ANY WAY OUT OF THE USE, REPRODUCTION, |
// MODIFICATION AND/OR DISTRIBUTION OF THE APPLE SOFTWARE, HOWEVER CAUSED |
// AND WHETHER UNDER THEORY OF CONTRACT, TORT (INCLUDING NEGLIGENCE), |
// STRICT LIABILITY OR OTHERWISE, EVEN IF APPLE HAS BEEN ADVISED OF THE |
// POSSIBILITY OF SUCH DAMAGE. |
// |
// Copyright (c) 2008 Apple Inc., All rights reserved. |
// |
//--------------------------------------------------------------------------- |
//------------------------------------------------------------------------ |
#import "OpenGLController.h" |
//------------------------------------------------------------------------ |
//------------------------------------------------------------------------ |
@implementation OpenGLController |
//------------------------------------------------------------------------ |
- (void) initFilter |
{ |
self = [super init]; |
textureSize = NSMakeSize( 1024, 1024 ); // Texture size = array size = 1024 x 1024 |
dataBounds = NSMakeRect( -1, -1, 1, 1 ); // Data bounds = orthographic projection 2D range |
// Dictionary for the uniform(s) associated with our fragment shader |
NSArray *theUniformKeys = [NSArray arrayWithObjects: @"textureUnit", nil]; |
NSArray *theUniformValues = [NSArray arrayWithObjects: [NSNumber numberWithInt:0], nil]; |
NSDictionary *theUniformDictionary = [NSDictionary dictionaryWithObjects:theUniformValues forKeys:theUniformKeys]; |
// Instantiate a filter with the fragment shader, uniforms, data domain, |
// and data capacity the size of our texture |
filter = [[OpenGLFilterUtilityToolKit alloc] initWithFilterInAppBundle:@"LaplacianEdgeDetectionFilter" |
uniformDictionary:theUniformDictionary |
bounds:dataBounds |
size:textureSize]; |
} // initFilter |
//------------------------------------------------------------------------ |
- (id) init |
{ |
// Initialize the Laplacian edge detection filter and its uniforms |
[self initFilter]; |
// To demonstrate the capabilities of our filter, instantiate a rotating model |
// object so that we can continously generate and feed data into our filter |
models = [[OpenGLRotateModels alloc] init]; |
return self; |
} // initWithTimerAttributes |
//------------------------------------------------------------------------ |
- (void) dealloc |
{ |
// The models are no longer needed |
[models dealloc]; |
// The filter is no longer needed |
[filter dealloc]; |
// Notify the superclass |
[super dealloc]; |
} // dealloc |
//------------------------------------------------------------------------ |
#pragma mark -- Reshaping & updating the state -- |
//------------------------------------------------------------------------ |
- (void) reshape:(NSRect)theBounds |
{ |
[filter resize:theBounds]; |
} // reshape |
//------------------------------------------------------------------------ |
#pragma mark -- Updating & Rendering textures -- |
//------------------------------------------------------------------------ |
// |
// This method updates the texture by rendering the models (a rotating |
// Stanford Bunny and 3 tori) and copying the image to a texture. Further- |
// more in a second pass we render again by using the generated texture |
// as input to the installed filter. The results produced by the filter |
// are then copied to the allocated texture. The resulting texture is |
// then used for visualizing the results of our computation. |
// |
//------------------------------------------------------------------------ |
- (void) update |
{ |
[filter prepare]; |
[models rotate]; |
[filter run]; |
} // update |
//------------------------------------------------------------------------ |
@end |
//------------------------------------------------------------------------ |
//------------------------------------------------------------------------ |
Copyright © 2008 Apple Inc. All Rights Reserved. Terms of Use | Privacy Policy | Updated: 2008-02-06