/*

     File: APLOpenGLRenderer.h

 Abstract:  OpenGL base class renderer setups a CGLContextObj for rendering, it also loads, compiles and links the vertex and fragment shaders. 

  Version: 1.1

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#import <Foundation/Foundation.h>

#import <OpenGL/OpenGL.h>

#import <OpenGL/gl.h>

#import <OpenGL/glext.h>

#import <OpenGL/glu.h>

enum

{

    UNIFORM_RGB,

    UNIFORM_RENDER_TRANSFORM,

    NUM_UNIFORMS

};

GLint uniforms[NUM_UNIFORMS];

enum

{

    ATTRIB_VERTEX,

    ATTRIB_TEXCOORD,

    NUM_ATTRIBUTES

};

@interface APLOpenGLRenderer : NSObject

{

    CGLContextObj _previousContext;

    CGLContextObj _currentContext;

}

@property GLuint program;

@property CGAffineTransform renderTransform;

@property CVOpenGLTextureCacheRef videoTextureCache;

@property GLuint offscreenBufferHandle;

- (CVOpenGLTextureRef)textureForPixelBuffer:(CVPixelBufferRef)pixelBuffer;

- (void)renderPixelBuffer:(CVPixelBufferRef)destinationPixelBuffer usingForegroundSourceBuffer:(CVPixelBufferRef)foregroundPixelBuffer andBackgroundSourceBuffer:(CVPixelBufferRef)backgroundPixelBuffer forTweenFactor:(float)tween;

@end