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GPUImageRemap_2.m
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GPUImageRemap_2.m
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//
// GPUImageRemap_2.m
// PhotoFX
//
// Created by dli on 10/24/15.
// Copyright (c) 2015 Mobiletuts. All rights reserved.
//
#import "GPUImageRemap_2.h"
NSString *const kGPUImageRemap_2ShaderString = SHADER_STRING
(
precision lowp float;
varying highp vec2 textureCoordinate;
uniform sampler2D inputImageTexture;
uniform sampler2D inputImageTexture2;
void main()
{
vec4 texel = texture2D(inputImageTexture, textureCoordinate);
vec4 mapped;
mapped.r = texture2D(inputImageTexture2, vec2(texel.r, .16666)).r;
mapped.g = texture2D(inputImageTexture2, vec2(texel.g, .5)).g;
mapped.b = texture2D(inputImageTexture2, vec2(texel.b, .83333)).b;
mapped.a = 1.0;
gl_FragColor = mapped;
}
);
@implementation GPUImageRemap_2
- (id)init;
{
if (!(self = [super initWithFragmentShaderFromString:kGPUImageRemap_2ShaderString]))
{
return nil;
}
return self;
}
@end