text: #if __has_include(<GPUImage/GPUImageFramework.h>)
  #import <GPUImage/GPUImage3x3ConvolutionFilter.h>
  #else
  #import "GPUImage3x3ConvolutionFilter.h"
  #endif
  
  @interface GPUImageEmbossFilter : GPUImage3x3ConvolutionFilter
  
  // The strength of the embossing, from  0.0 to 4.0, with 1.0 as the normal level
  @property(readwrite, nonatomic) CGFloat intensity; 
  
  @end
  