text: /*
   * Copyright (C) Research In Motion Limited 2009-2010. All rights reserved.
   *
   * This library is free software; you can redistribute it and/or
   * modify it under the terms of the GNU Library General Public
   * License as published by the Free Software Foundation; either
   * version 2 of the License, or (at your option) any later version.
   *
   * This library is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   * Library General Public License for more details.
   *
   * You should have received a copy of the GNU Library General Public License
   * along with this library; see the file COPYING.LIB.  If not, write to
   * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
   * Boston, MA 02110-1301, USA.
   */
  
  #ifndef RenderSVGResource_h
  #define RenderSVGResource_h
  
  #include "core/rendering/svg/RenderSVGShape.h"
  #include "core/svg/SVGDocumentExtensions.h"
  
  namespace WebCore {
  
  enum RenderSVGResourceType {
      MaskerResourceType,
      MarkerResourceType,
      PatternResourceType,
      LinearGradientResourceType,
      RadialGradientResourceType,
      SolidColorResourceType,
      FilterResourceType,
      ClipperResourceType
  };
  
  // If this enum changes change the unsigned bitfields using it.
  enum RenderSVGResourceMode {
      ApplyToDefaultMode = 1 << 0, // used for all resources except gradient/pattern
      ApplyToFillMode    = 1 << 1,
      ApplyToStrokeMode  = 1 << 2,
      ApplyToTextMode    = 1 << 3 // used in combination with ApplyTo{Fill|Stroke}Mode
  };
  typedef unsigned RenderSVGResourceModeFlags;
  
  class GraphicsContext;
  class Path;
  class RenderObject;
  class RenderStyle;
  class RenderSVGResourceSolidColor;
  
  class RenderSVGResource {
  public:
      RenderSVGResource() { }
      virtual ~RenderSVGResource() { }
  
      virtual void removeAllClientsFromCache(bool markForInvalidation = true) = 0;
      virtual void removeClientFromCache(RenderObject*, bool markForInvalidation = true) = 0;
  
      virtual bool applyResource(RenderObject*, RenderStyle*, GraphicsContext*&, unsigned short resourceMode) = 0;
      virtual void postApplyResource(RenderObject*, GraphicsContext*&, unsigned short, const Path*, const RenderSVGShape*) { }
  
      virtual RenderSVGResourceType resourceType() const = 0;
  
      template<class Renderer>
      Renderer* cast()
      {
          if (Renderer::s_resourceType == resourceType())
              return static_cast<Renderer*>(this);
  
          return 0;
      }
  
      // Helper utilities used in the render tree to access resources used for painting shapes/text (gradients & patterns & solid colors only)
      // If hasFallback gets set to true, the sharedSolidPaintingResource is set to a fallback color.
      static RenderSVGResource* fillPaintingResource(RenderObject*, const RenderStyle*, bool& hasFallback);
      static RenderSVGResource* strokePaintingResource(RenderObject*, const RenderStyle*, bool& hasFallback);
      static RenderSVGResourceSolidColor* sharedSolidPaintingResource();
  
      static void markForLayoutAndParentResourceInvalidation(RenderObject*, bool needsLayout = true);
  };
  
  #define DEFINE_RENDER_SVG_RESOURCE_TYPE_CASTS(thisType, typeName) \
      DEFINE_TYPE_CASTS(thisType, RenderSVGResource, resource, resource->resourceType() == typeName, resource.resourceType() == typeName)
  
  }
  
  #endif
  