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<h2>/Classes/OpenGL/Shaders/Units/Sky/GLSLSkyUnit.m</h2>
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<pre class="sourcecodebox">//---------------------------------------------------------------------------
//
// File: GLSLSkyUnit.m
//
// Abstract: Utility toolkit for GLSL sky shader
//
// Disclaimer: IMPORTANT: This Apple software is supplied to you by
// 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 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) 2004-2007 Apple Inc., All rights reserved.
//
//---------------------------------------------------------------------------
//------------------------------------------------------------------------
#import "GLSLUnitDictConsts.h"
#import "GLSLSkyUnit.h"
//------------------------------------------------------------------------
//------------------------------------------------------------------------
static const GLfloat kBlueFactorMax = 10.0f;
//------------------------------------------------------------------------
//------------------------------------------------------------------------
@implementation GLSLSkyUnit
//------------------------------------------------------------------------
#pragma mark -- initializer --
//------------------------------------------------------------------------
- (id) initShaderWithSize:(const NSSize *)theSize
{
NSNumber *uniformSamplerId = [NSNumber numberWithInt:0];
NSDictionary *uniformSamplerDict = [NSDictionary dictionaryWithObject:uniformSamplerId forKey:@"tex"];
self = [super initWithShadersInAppBundleAndSamplers:@"sky" size:theSize samplers:uniformSamplerDict];
if ( self )
{
uniformLoc = [self uniformLocation:@"blueFactor"];
} // if
return self;
} // initShaderWithSize
//------------------------------------------------------------------------
#pragma mark -- Deallocating Resources --
//------------------------------------------------------------------------
- (void) dealloc
{
//Dealloc the superclass
[super dealloc];
} // dealloc
//------------------------------------------------------------------------
#pragma mark -- Utilities --
//---------------------------------------------------------------------------
- (void) executeWithFloatUniform:(CVOpenGLTextureRef)theVideoFrame
value:(const GLfloat *)theUniformValue
{
GLfloat uniformValue[1];
uniformValue[0] = kBlueFactorMax * theUniformValue[0];
[self uniform1fv:uniformLoc count:1 values:uniformValue];
[self excuteWithCVTexture:theVideoFrame];
} // executeWithFloatUsingUniform
//------------------------------------------------------------------------
@end
//------------------------------------------------------------------------
//------------------------------------------------------------------------
</pre>
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