precision highp float;varying highp vec2 textureCoordinate;varying highp vec2 leftTextureCoordinate;varying highp vec2 rightTextureCoordinate; varying highp vec2 topTextureCoordinate;varying highp vec2 bottomTextureCoordinate;varying highp float centerMultiplier;varying highp float edgeMultiplier;uniform sampler2D inputImageTexture;void main(){mediump vec3 textureColor = texture2D(inputImageTexture, textureCoordinate).rgb;mediump vec3 leftTextureColor = texture2D(inputImageTexture, leftTextureCoordinate).rgb;mediump vec3 rightTextureColor = texture2D(inputImageTexture, rightTextureCoordinate).rgb;mediump vec3 topTextureColor = texture2D(inputImageTexture, topTextureCoordinate).rgb;mediump vec3 bottomTextureColor = texture2D(inputImageTexture, bottomTextureCoordinate).rgb;gl_FragColor = vec4((textureColor * centerMultiplier - (leftTextureColor * edgeMultiplier + rightTextureColor * edgeMultiplier + topTextureColor * edgeMultiplier + bottomTextureColor * edgeMultiplier)), texture2D(inputImageTexture, bottomTextureCoordinate).w);}

+ (UIImage *)changeValueForSharpenilter:(float)value image:(UIImage *)image
{GPUImageSharpenFilter *filter = [[GPUImageSharpenFilter alloc] init];filter.sharpness = value;[filter forceProcessingAtSize:image.size];GPUImagePicture *pic = [[GPUImagePicture alloc] initWithImage:image];[pic addTarget:filter];[pic processImage];[filter useNextFrameForImageCapture];return [filter imageFromCurrentFramebuffer];
}