text: /*
   * Copyright (C) 2012 Adobe Systems Incorporated. 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 HOLDER “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 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.
   */
  
  #ifndef CustomFilterOperation_h
  #define CustomFilterOperation_h
  
  #if ENABLE(CSS_SHADERS)
  #include "CustomFilterConstants.h"
  #include "CustomFilterParameterList.h"
  #include "CustomFilterProgram.h"
  #include "FilterOperation.h"
  #include "LayoutSize.h"
  
  namespace WebCore {
  
  // CSS Shaders
  
  class CustomFilterOperation : public FilterOperation {
  public:
      static PassRefPtr<CustomFilterOperation> create(PassRefPtr<CustomFilterProgram> program, const CustomFilterParameterList& sortedParameters, unsigned meshRows, unsigned meshColumns)
      {
          return adoptRef(new CustomFilterOperation(program, sortedParameters, meshRows, meshColumns));
      }
      
      CustomFilterProgram* program() const { return m_program.get(); }
      void setProgram(PassRefPtr<CustomFilterProgram> program) { m_program = program; }
      
      const CustomFilterParameterList& parameters() const { return m_parameters; }
      
      unsigned meshRows() const { return m_meshRows; }
      unsigned meshColumns() const { return m_meshColumns; }
  
      CustomFilterMeshType meshType() const { return program() ? program()->meshType() : MeshTypeAttached; }
      
      virtual ~CustomFilterOperation();
      
      virtual bool affectsOpacity() const { return true; }
      virtual bool movesPixels() const { return true; }
      virtual bool blendingNeedsRendererSize() const { return true; }
      
      virtual PassRefPtr<FilterOperation> blend(const FilterOperation* from, double progress, const LayoutSize&, bool blendToPassthrough = false);
  
  protected:
      CustomFilterOperation(PassRefPtr<CustomFilterProgram>, const CustomFilterParameterList&, unsigned meshRows, unsigned meshColumns);
      
  private:
      virtual bool operator==(const FilterOperation& o) const
      {
          if (!isSameType(o))
              return false;
  
          const CustomFilterOperation* other = static_cast<const CustomFilterOperation*>(&o);
          return m_program.get() == other->m_program.get()
              && m_meshRows == other->m_meshRows
              && m_meshColumns == other->m_meshColumns
              && m_parameters == other->m_parameters;
      }
  
      RefPtr<CustomFilterProgram> m_program;
      CustomFilterParameterList m_parameters;
      
      unsigned m_meshRows;
      unsigned m_meshColumns;
  };
  
  } // namespace WebCore
  
  #endif // ENABLE(CSS_SHADERS)
  
  #endif // CustomFilterOperation_h
  