text: #import "GPUImageFilter.h"
  
  /** Transforms the colors of an image by applying a matrix to them
   */
  @interface GPUImageColorMatrixFilter : GPUImageFilter
  {
      GLint colorMatrixUniform;
      GLint intensityUniform;
  }
  
  /** A 4x4 matrix used to transform each color in an image
   */
  @property(readwrite, nonatomic) GPUMatrix4x4 colorMatrix;
  
  /** The degree to which the new transformed color replaces the original color for each pixel
   */
  @property(readwrite, nonatomic) GLfloat intensity;
  
  @end
  