text: /*
   * Copyright (c) 2020, the SerenityOS developers.
   * All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions are met:
   *
   * 1. Redistributions of source code must retain the above copyright notice, this
   *    list of conditions and the following disclaimer.
   *
   * 2. Redistributions in binary form must reproduce the above copyright notice,
   *    this list of conditions and the following disclaimer in the documentation
   *    and/or other materials provided with the distribution.
   *
   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
   * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
   * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
   * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
   * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
   * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
   * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
   * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   */
  
  #pragma once
  
  #include <LibGUI/Event.h>
  #include <LibGUI/Forward.h>
  #include <LibGfx/Forward.h>
  
  namespace PixelPaint {
  
  class Filter {
  public:
      class Parameters {
      public:
          Parameters(Gfx::Bitmap& bitmap, const Gfx::IntRect& rect)
              : m_target_bitmap(bitmap)
              , m_target_rect(rect)
  
          {
          }
  
          Gfx::Bitmap& bitmap() const { return m_target_bitmap; }
          const Gfx::IntRect& rect() const { return m_target_rect; }
          virtual bool is_generic_convolution_filter() const { return false; }
  
          virtual ~Parameters() { }
  
      private:
          Gfx::Bitmap& m_target_bitmap;
          Gfx::IntRect m_target_rect;
      };
      virtual ~Filter();
  
      virtual const char* class_name() const = 0;
  
      virtual void apply(const Parameters&) = 0;
  
  protected:
      Filter();
  };
  
  }
  