/*

 Copyright (C) 2017 Apple Inc. All Rights Reserved.

 See LICENSE.txt for this sample’s licensing information

 Abstract:

 OpenGL base class renderer sets up an EAGLContext for rendering, it also loads, compiles and links the vertex and fragment shaders for both the Y and UV planes.

 */

#import <Foundation/Foundation.h>

#import <OpenGLES/EAGL.h>

#import <OpenGLES/ES2/gl.h>

#import <OpenGLES/ES2/glext.h>

enum

{

    UNIFORM_Y,

    UNIFORM_UV,

    UNIFORM_RENDER_TRANSFORM_Y,

    UNIFORM_RENDER_TRANSFORM_UV,

    NUM_UNIFORMS

};

extern GLint uniforms[NUM_UNIFORMS];

enum

{

    ATTRIB_VERTEX_Y,

    ATTRIB_TEXCOORD_Y,

    ATTRIB_VERTEX_UV,

    ATTRIB_TEXCOORD_UV,

    NUM_ATTRIBUTES

};

@interface APLOpenGLRenderer : NSObject

@property GLuint programY;

@property GLuint programUV;

@property CGAffineTransform renderTransform;

@property CVOpenGLESTextureCacheRef videoTextureCache;

@property EAGLContext *currentContext;

@property GLuint offscreenBufferHandle;

- (CVOpenGLESTextureRef)lumaTextureForPixelBuffer:(CVPixelBufferRef)pixelBuffer;

- (CVOpenGLESTextureRef)chromaTextureForPixelBuffer:(CVPixelBufferRef)pixelBuffer;

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

@end